Double Power Miner

2. Campus network multi-purpose IPv6 ecation network or LAN access, the upper layer without operator equipment filtering, few firewalls, almost all ports exposed in the WAN environment, easy to attack

3. In Guangming New District of Shenzhen, there is a company named McKenzie, which is a manufacturer of 6U al power mining machine
box. They have been working as chassis for many years
recommend this brand to the owner. I hope you like it.

4. It can be realized by means of equipment and technology. Now there are practical examples of integrated power supply of wind power generation, solar power generation and diesel power generation
however, an unstable power supply can not directly supply power to the load, so it must be stabilized first (energy storage, inverter, etc.)
power supply switching is very simple, with al power automatic switch, switching time is only a few milliseconds, which will not cause power interruption. You can also set a power priority
if al power supply is needed at the same time, it needs to be connected to the grid

it is simpler to switch the DC side of al power supply than the AC side.

5. Electromechanical Safety Quality Standardization standard and assessment score table
total score of mine:
serial number Inspection items Assessment and scoring method Standard
score Actual score The reasons for dection
total one hundred
one Equipment and index thirty < br />1 The mechanical and electrical equipment must have the proct certificate, the coal mine proct safety mark, and the explosion-proof equipment must have the explosion-proof certificate On site inspection, if one is found unqualified, no score will be given five < br />2 The intact rate of mechanical and electrical equipment in the whole mine is 90% For on-site inspection, 0.5 points will be dected for every 1% rection five < br />3 The large fixed equipment in use is in good condition 1.5 points will be dected if one is not in good condition ring on-site inspection three < br />4 Explosion proof rate of explosion-proof electrical equipment and small electrical appliances is 100% No score will be given if one set (piece) is found to be lost ring on-site inspection five < br />5 The qualified rate of small electrical appliances is 95% For on-site inspection, 0.5 points will be dected for every 1% rection two < br />6 The qualified rate of cable hanging is 95% For on-site inspection, 0.5 points will be dected for every 1% rection two < br />7 The intact rate of miner's lamp is 95%, and there is no red light or off light for miner's lamp in use underground On site inspection, no score below 95%, spot check no less than 50, 0.5 points dected if a red light is found underground; One point will be dected if the lights are off two < br />8 5% of equipment to be repaired For on-site inspection, 1 point will be dected for every 1% increase two < br />9 Electromechanical accident rate 1% Check the report and record, accumulate by month, no score if it is more than 2%, no score if it is inconsistent with the record two < br />10 No non-standard and obsolete equipment 0.5 points will be dected if one is found one < br />11 Have the equipment overhaul plan issued by the company (bureau), and can complete 90% or more If there is no overhaul plan or the completion rate of the plan is less than 90%, if it is less than 25% in the first half of the year, no score will be given one
two Electromechanical Safety thirty < br /> The safety protection device is complete and reliable, and the qualified rate is 100% < br />1 Main lifting system five < br /> The vertical shaft (inclined shaft) hoisting system should be equipped with: (1) under voltage protection 2) Over current protection 3) Over winding protection 4) Gate gap protection 5) Over speed protection 6) Speed limit protection 7) Loose rope protection 8) The signal and control circuit are locked 9) Single rope cage lifting with anti falling device 10) The communication signals are perfect and meet the requirements 11) Depth indicator failure protection 12) Full bin protection device 13) Deceleration function protection 14) The function protection against over winding, over speed, speed limit and deceleration is set as independent double line type 15) Auxiliary shaft and negative lifting system are equipped with electric braking 16) If the braking deceleration degree of inclined shaft lifting can not meet the requirements, secondary braking device shall be set 17) Lifting winch height One point will be dected if one site inspection fails. three
inspector: professional team leader: inspection time:
Electromechanical Safety Quality Standardization standard and assessment score table (continued Table 1)
total score of mine:
serial number Inspection items Assessment and scoring method Standard
score Actual score The reasons for dection
Low voltage double circuit 18) Shaft wellhead facilities interlocking 19) Anti collision beam and can supporting device of shaft hoisting system 20) The overwinding height and overwinding distance of shaft hoisting system meet the requirements 21) the skip of main shaft is loaded with fixed weight 22) install instrial TV monitor at upper and lower wellhead < br /> Main lifting belt conveyor
installation of wire rope traction belt: ① under voltage protection; ②; Over current protection; ③ De grooving protection; ④ Over speed protection; ⑤ Local overload protection of conveyor belt; ⑥ When the wire rope tensioning car reaches the terminal point and the tensioning heavy hammer falls to the ground for protection; ⑦ There should be an emergency stop device that can be operated by passengers or other personnel at any place of the whole length of the conveyor; ⑧ Sound and light signal and automatic stop device for dismounting place; ⑨ Installation of steel cord belt: ① under voltage protection; 2; ② Over current protection; ③ Coal storage protection; ④ Anti skid protection; ⑤ Anti deviation device; ⑥ Temperature protection; ⑦ Smoke protection; ⑧ Automatic sprinkler; ⑨ Belt tension drop protection; ⑩ Tear protection; (11) anti reversing device and braking device shall be set up ring up running, and braking device shall be set up ring down running; (12) belt break protection device. One disqualification is not scored two < br />2 Mine ventilation system has:
(1) 2) . anti wind facilities 3) Explosion proof door 4) The motor has over-current protection and no voltage release device 5) Bearing has over temperature indication and alarm signal 6) . there is a private phone If one item is missing or one place is unqualified, no score will be given one < br />3 The compressed air system has over temperature protection, water and oil cut-off protection or signal, motor over-current protection, safety valve and pressure relief valve reliable action If one item is missing or one place is unqualified, no score will be given. one < br />4 The main drainage system includes: closed door; The distribution gate is complete and flexible; Reliable water diversion device; Short circuit protection; The motor protection is complete; The safe passage is unblocked; Under voltage protection If one item is missing or one place is unqualified, no score will be given one < br />5 The steam boiler of heating system (instrial boiler system with evaporation capacity of 2T / h and above) is equipped with two-color water level gauge or two independent water level gauges, with high and low water level alarm device, and the action of safety valve and blowdown valve is reliable. The hot water boiler shall be equipped with thermometer, safety valve, overtemperature protection and automatic water supply device, with reliable action, pressure recing valve, overpressure alarm and interlock protection in the system. If one item is missing or one place is unqualified, no score will be given one
inspector: professional team leader: inspection time:
Electromechanical Safety Quality Standardization standard and assessment score table (continued Table 2)
total score of mine:
serial number Inspection items Assessment and scoring method Standard
score Actual score Reasons for dection
6 The ground power supply system has: (1) special double circuits for main equipment 2) Direct supply motor or switch with capacitor has under voltage protection 3) Over current protection 4) Switch cabinet "five prevention" function 5) The switch cabinet with reverse power transmission shall be locked and clearly marked 6) The substation shall have reliable tripping power supply 7) The high voltage distribution board is equipped with selective grounding protection 8) The single-phase grounding capacitive current meets the requirements 9) The main operation mode meets the requirements 10) Electrical work order and operation order meet the requirements 11) There is a private phone On site inspection, one less item or one unqualified item: (1) no score; (2) ~ (11) dect 1 point three < br />7 Underground power supply system twelve < br />1 Qualified power supply system design and protection setting verification 0.5 points will be dected if one of them fails to pass the on-site inspection and data checking two < br />2 High voltage flameproof switch should be installed: (1) under voltage release protection 2) Short circuit protection 3) Overload protection 4) Selective grounding protection device 5) The vacuum high voltage explosion-proof switch should also be equipped with overvoltage protection
the general high voltage switch for mining should be installed with: (1) under voltage protection 2) Short circuit protection 0.5 points will be dected if one part is not installed or unqualified (1) ~ (2) ring on-site inspection or data checking 3) Dect 0.2 point for (5) one point five < br />3 Low voltage motors are equipped with short circuit, overload, single-phase disconnection, leakage blocking protection and remote control devices. If one part is not installed or unqualified, no score will be given one < br />4 The motor of 40kW and above shall be controlled by vacuum electromagnetic force starter, and the motor shall be protected comprehensively If one part is not installed or unqualified, no score will be given. one < br />5 Comprehensive protection for 127V power supply system (including signal lighting, electric coal drill, etc.) 0.5 points will be dected if one part is not installed or unqualified ring on-site inspection or data checking one < br />6 Local fans and electrical equipment in heading face must be equipped with wind power locking device If one part is not installed or unqualified, no score will be given. one < br />7 Wind power locking device and gas power locking device must be installed in coal roadway driving face If one part is not installed or unqualified, no score will be given. one point five < br />8 Four small wires and power cables use flame retardant cables 0.5 points will be dected if one cable is unqualified, 0.5 points will be dected if one cable joint of intrinsically safe system is unqualified, and the unqualified cable joint of non intrinsically safe system will be punished as loss of explosion one < br />9 Low voltage power supply system must be equipped with leakage detection protection or selective leakage protection device. 0.5 points will be dected if one non conformity is found ring on-site inspection or data checking one < br />10 The grounding protection meets the requirements of "detailed rules for installation, inspection and measurement of underground protective grounding devices in coal mines" If one disqualification is found ring on-site inspection, no score will be given one
inspector: professional team leader: inspection time:
Electromechanical Safety Quality Standardization standard and assessment score table (continued Table 3)
total score of mine:
serial number Inspection items Assessment and scoring method Standard
score Actual score Reasons for dection
8 Mining and transportation equipment six < br />1 The shearer is equipped with locking device for emergency stop scraper conveyor, and the fully mechanized working face is equipped with communication and lighting. The working face with inclination of 15 degrees and above must be equipped with anti-skid device. The working face of coal plough shall be equipped with devices that can stop the plough head and scraper conveyor at any time or send signals to the driver of coal plough at least every 30 m. The plough head position indicator shall be provided. When the inclination angle of working face is more than 12 degrees, the scraper conveyor must be equipped with anti-skid and anchoring devices. The loader shall be equipped with rail clamping device, brake, protective railings and lighting. The buzzer, lighting and emergency stop switch of roadheader are complete. 0.5 points will be dected if one item is missing or one place is unqualified in on-site inspection or inspection data three < br />2 Scraper conveyor, belt conveyor
hydraulic coupling of scraper conveyor, using water (or fire-resistant liquid) medium, using qualified fusible plug and explosion-proof sheet
flame retardant belt is used for belt conveyor, with anti-skid, coal stacking, anti deviation, temperature and smoke protection, automatic sprinkling device, protective barrier at the head, shield at the tail, and crossing bridge at pedestrian crossing The head and tail of the conveyor are fixed firmly 0.5 points will be dected if one non conformity is found ring on-site inspection or data checking two < br />3 The hydraulic system
has complete parts and components, the pipeline and valve group are not connected and leaking, and the pump station pressure meets the requirements 0.1 point will be dected for one disqualification ring on-site inspection one
three Mechanical and electrical management, civilized proction forty < br />1 There are mechanical and electrical departments and electrical, cable, small electrical appliances, explosion-proof inspection, equipment, accessories, grease, tape professional management team five < br />1 Mechanical and electrical department in charge and play a leading role in charge of business There is no department in charge or it doesn't work, no score one < br />2 Business flow chart suitable for integrated management No, no, No one < br />3 ( 1) Electrical management 2) Cable management 3) Small electrical equipment management 4) Explosion proof inspection 5) Equipment management 6) Spare parts management 7) Oil management (including emulsion Management) If one item is found to be unmanaged or mismanaged, 1 point will be dected three < br />2 Carry out comprehensive management of equipment eight < br />1 Participate in the overall planning of major equipment Check information, no planning or implementation is not good score one < br />2 Reasonable selection Check the equipment, find one does not meet the requirements, no score one < br />3 Timely installation 0.5 points will be dected if one of the equipment is found not to meet the requirements one
inspector: professional team leader: inspection time:

Electromechanical Safety and quality standardization standards and assessment

6. Qinxiu company Electromechanical Safety Quality Standardization standards and assessment scoring method (instry standard)
serial number project Standard score Assessment and scoring method Remarks
total 1 Equipment and index 30
1、 Mechanical and electrical equipment must have proct certificate, coal mine proct safety signs, explosion-proof equipment must have explosion-proof certificate five If one is found to be unqualified ring on-site inspection, the score will not be
2 The intact rate of mechanical and electrical equipment in the whole mine is 90% five For on-site inspection, 0.5 points will be dected for every 1% rection
3 The large fixed equipment in use is in good condition three 1.5 points will be dected if one is not in good condition ring on-site inspection
4 Explosion proof rate of explosion-proof electrical equipment and small electrical appliances is 100% five In the field inspection, if one unit (piece) is found to be missing, no score will be given
5 The qualified rate of small electrical appliances is 95% two For on-site inspection, 0.5 points will be dected for every 1% rection
6 The qualified rate of cable hanging is 95% two For on-site inspection, 0.5 points will be dected for every 1% rection
7 The intact rate of miner's lamp is 95%. There is no red light, off light and unqualified miner's lamp in use underground two For on-site inspection, no score less than 95%, no score less than 50, 0.5 point dected if a red light is found underground, 1 point dected if the light is off
8 5% of equipment to be repaired two For on-site inspection, 1 point will be dected for every 1% increase
9 Electromechanical accident rate 1% two Check the reports and records, if the monthly cumulative score is more than 2%, the score is not consistent with the records
10 Plan and implement the equipment renovation one If there is no annual plan or the project cannot be completed, the score will not be
11 Have the equipment overhaul plan issued by the company (bureau), and can complete more than 90% one If there is no overhaul plan or the completion rate of the plan is less than 90%, and it is less than 25% in the first half of the year, there is no score
2 Electromechanical Safety 30
the safety protection devices are complete and reliable, and the qualified rate is 100%
1 Main lifting system 5
the hoisting system of vertical shaft (inclined shaft) should be equipped with: (1) under voltage protection 2) Over current protection 3) Over winding protection 4) Over speed protection 5) Speed limit protection 6) Gate gap protection 7) Loose rope protection 8) The signal and control circuit are locked 9) The single rope cage lifting shall be equipped with protective device 10) The communication signals are perfect and meet the requirements 11) Depth indicator failure protection 12) Full bin protection device 13) Deceleration function protection 14) The function protection against over winding, over speed, speed limit and deceleration is set as independent double line type 15) Auxiliary shaft and negative lifting system are equipped with electric braking 16) If the braking deceleration degree of inclined shaft lifting can not meet the requirements, secondary braking device shall be set 17) High and low pressure double circuit of lifting winch 18) The shaft wellhead is equipped with interlock 19) Anti collision beam and can supporting device of shaft hoisting system 20) The overwinding height and overwinding distance of shaft hoisting system meet the requirements 21) the main shaft skip adopts weight fixing device 22) install instrial TV monitor at upper and lower wellhead three After on-site inspection, 1 point will be dected for one disqualification 2) Over current protection 3) De grooving protection 4) Over speed protection 5) Local overload protection of conveyor belt 6) When the wire rope tension car reaches the terminal point and the tension hammer falls to the ground for protection 7) There should be an emergency stop device that can be operated by passengers or other personnel at any place of the whole length of the conveyor 8) Sound and light signal and automatic stop device for dismounting place 9) Coal unloading port to prevent people from falling into the facilities (7-9 refers to part-time passenger conveyor). Installation of steel cord belt: (1) under voltage protection 2) Over current protection 3) Coal storage protection 4) Anti skid protection 5) Anti deviation device 6) Temperature protection 7) Smoke protection 8) Automatic sprinkler 9) Belt tension drop protection 10) Tear protection 11) Anti reversing device and braking device are set up when transporting upward, and braking device is set up when transporting downward 12) Belt break protection device two No score for one disqualification
2 The mine main ventilation system should have: (1) reliable al power supply 2) Anti wind facilities 3) Explosion proof door 4) The motor has over-current protection and no voltage release device 5) Bearing has over temperature indication and alarm signal 6) There is a private phone one If one item is missing or one place is unqualified, the score will not be
3 The compressed air system shall have: over temperature protection, water and oil cut-off protection (or signal), over-current protection for motor, and reliable action of safety valve and pressure relief valve one If one item is missing or one place is unqualified, the score will not be
4 The main drainage system should have: (1) closed door 2) The distribution gate is complete and flexible 3) Reliable water diversion device 4) Short circuit protection 5) Under voltage protection 6) The motor protection is complete 7) The safe passage is unblocked one If one item is missing or one place is unqualified, the score will not be
5 The steam boiler of heating system (instrial boiler system with evaporation capacity of 2T / h and above) is equipped with two-color water level gauge or two independent water level gauges, with high and low water level alarm device, and the action of safety valve and blowdown valve is reliable. The hot water boiler shall be equipped with thermometer, safety valve, over temperature protection and automatic water supply device, with reliable action, pressure recing valve, over pressure alarm and interlock protection in the system one If one item is missing or one place is unqualified, the score will not be
6 The ground power supply system shall have: (1) special double circuits for main equipment 2) Direct supply motor or switch with capacitor has under voltage protection 3) Over current protection 4) The switch cabinet has "five prevention" function 5) The switch cabinet with reverse power transmission shall be locked and clearly marked 6) The substation shall have reliable tripping power supply 7) The high voltage distribution board is equipped with selective grounding protection 8) The single grounding capacitance current meets the requirements 9) The main operation mode meets the requirements 10) Electrical work order and operation order meet the requirements 11) There is a private phone three On site inspection, one item is missing or one item is unqualified: (1) no score, (2) - (11) 1 point is dected
7 Underground power supply system 12
1 Qualified power supply system design and protection setting verification two 0.5 points will be dected for one disqualification in on-site inspection or data checking
(2) & quot; High voltage flameproof switch should be installed: (1) under voltage release protection (2) short circuit protection (3) overload protection (4) selective grounding protection device (5) vacuum high voltage flameproof switch should be installed with over-voltage protection
mine general high voltage switch should be installed: (1) under voltage protection (2) short circuit protection; one point five If one part is found not installed or unqualified ring on-site inspection or data checking, 0.5 points will be dected for (1) and (2), and 0.2 points will be dected for (3) - (5).
(3) Low voltage motor shall be equipped with short circuit, overload, single-phase disconnection, leakage blocking protection and remote control device one If one part is not installed or unqualified, the score is not
(4) The motor of 40kW and above shall be controlled by vacuum electromagnetic super actuator, and comprehensive protection of motor shall be used one If one part is not installed or unqualified, the score is not
(5) Comprehensive protection for 127V power supply system (including signal lighting, electric coal drill, etc.) one 0.5 points will be dected if one part is not installed or unqualified after on-site inspection or data checking
(6) Local fans and electrical equipment in heading face must be equipped with wind power locking device one If one part is not installed or unqualified, the score will not be
(7) Wind power locking device and gas power locking device must be installed in coal roadway driving face one point five If one part is not installed or unqualified, the score will not be
(8) Four small wires and power cables use flame retardant cables one 0.5 points will be dected if one cable is unqualified, 0.5 points will be dected if one cable joint of intrinsically safe system is unqualified, and the unqualified cable joint of non intrinsically safe system will be treated as loss of explosion
(9) Low voltage power supply system must be equipped with leakage detection protection or selective leakage protection device one 0.5 points will be dected in case of one disqualification found in on-site inspection or data checking
(10) The grounding protection meets the requirements of installation inspection and measurement details of underground protective grounding device in coal mine one After on-site inspection, one disqualification was found, with no score
8 Mining and transportation equipment 6
1 The shearer is equipped with locking device for emergency stop scraper conveyor, and the fully mechanized working face is equipped with communication and lighting. The working face with inclination of 15 degrees and above must be equipped with anti-skid device. The loader shall be equipped with rail clamping device, brake, protective railings and lighting. The buzzer, lighting and emergency stop switch of roadheader are complete three 0.5 points will be dected if one item is missing or one item is unqualified ring on-site inspection or data checking< br />2 Scraper conveyor, belt conveyor, scraper conveyor hydraulic coupling, using water (or fire-resistant liquid) medium, using qualified fusible plug and explosion-proof sheet, the flame-retardant belt used in belt conveyor includes anti-skid, coal stacking, anti deviation, temperature, smoke protection, automatic sprinkler, conveyor head with protective fence, tail with shield, pedestrian need to cross the place to set up a bridge The tail and head of the conveyor are fixed firmly two 0.5 points will be dected if one item is missing or one item is unqualified ring on-site inspection or data checking< br />3 Hydraulic system parts are complete, pipeline, valve group is not string, leakage, pump station pressure meet the requirements one 0.1 point will be dected if one site inspection is unqualified
3 Mechanical and electrical management, civilized proction 42
1、 There are mechanical and electrical departments and electrical, cable, small electrical appliances, explosion-proof inspection, equipment, accessories, grease, tape professional management personnel 5
1 Mechanical and electrical department in charge and play a leading role in charge of business one There is no department in charge or it doesn't work, no score
(2) Have a business flow chart suitable for mechanical and electrical integrated management, and clarify the responsibilities of personnel at all levels one If there is no implementation or assessment method, 0.2 point will be dected for one place that fails to implement the method
(3) Strengthen professional management (1) electrical management 2) Cable management 3) Small electrical equipment management 4) Explosion proof inspection management 5) Equipment management 6) Spare parts management 7) Oil management (including emulsion) 8) Tape management three 0.5 points will be dected if one item is found to be unclear or mismanaged
2 Carry out comprehensive management of equipment 8
1 Participate in the overall planning of major equipment two The score of no plan or no implementation is not good after checking the data
(2) Reasonable selection one Check the equipment, one does not meet the requirements, no score
(3) Timely installation one If one equipment fails to meet the requirements, 0.5 points will be dected
(4) Correct use one Check whether the equipment or one does not meet the requirements, and do not score
(5) Careful maintenance one Mechanical and electrical accidents caused by inadequate equipment maintenance are not scored
(6) Scientific maintenance one If there is no shutdown maintenance plan or the annual shutdown maintenance is less than 12 days, no score
(7) Large scale fixed equipment with high energy consumption and low efficiency should be renewed and reformed in time one 0.2 points will be dected if one machine is not updated in time
(8) Scrap according to regulations one No score for incomplete scrapping proceres
3.3 Mechanical and electrical basic work 29
1 The staff shall be trained according to the plan and work with certificates 6
(1) 2-year rotation training plan for mechanical and electrical workers one (2) the annual technical competition and unified examination plan for various types of organic power instry were implemented according to the plan one point five (3) the annual technical training plan of organic power and the training assessment according to the plan one point five (4) all kinds of drivers and maintenance workers must undergo technical training, pass the examination, work with certificates, and be assessed once a year, and register their scores on the certificates and seal them two On site inspection, examination paper review (oral test), one person

7. 2 Responsibilities of underground electrical management team

1. Participate in the review of power supply design of new mining area and handover acceptance before operation

2. Participate in the approval of underground power supply system changes and power transmission applications, and timely adjust the power supply system diagram according to the system changes. Report the high-voltage power supply system diagram of the whole mine and the low-voltage power supply system diagram of the whole mine and the layout diagram of underground electrical equipment to the mine every quarter, and report a monthly cable comprehensive report and underground electrical management comprehensive report every month

3. Responsible for all kinds of electrical equipment, protection system, seasonal test and daily test in the whole mine, as well as telemetry of underground protection grounding system, and timely put forward treatment suggestions for problems. In accordance with the requirements of "coal mine safety regulations" and "coal mine three major protection rules", be responsible for supervising the safe operation of the three major electrical protections. The following records shall be collected and kept for reference for one year

leakage protection: test once a day, remote test once a month, and maintenance record once a year

grounding protection: measure the resistance of main grounding electrode (grid) once a quarter and record the resistance of grounding electrode one by one once a year

over current short circuit protection: check the setting protection of high and low voltage disconnectors one by one every 6 months, and verify the records

4. Strictly control the entry of electrical equipment, cables and small electrical appliances into the well. Those with incomplete "three certificates" are not allowed to enter the well. Those meeting the requirements can enter the well only after passing the explosion-proof performance inspection and sticking certificates

5. For gas accumulation accidents caused by unplanned power failure, immediately send people to participate in the investigation and verify the causes; Monthly statistics report unplanned outage, power down times and tracking situation< (3) the responsibilities of the electric control personnel

1. The electric control personnel must receive safety proction ecation and pass the training before they can work with certificates

2. Power management personnel should often go deep into the site, timely and accurately grasp the changes of underground power supply system, and provide accurate power supply system diagram. Check and understand the situation, participate in the quality standardization and safety inspection organized by the mine, summarize and analyze the underground electrical management problems existing in the inspection, and be responsible for tracing and supervising the rectification of the hidden dangers found in the inspection

3. Take full responsibility for the rationality of underground power supply under its jurisdiction, have correction opinions for unreasonable power supply system, and issue business contact letter. The unit that does not accept business contact or delay action has the right to punish or stop the power supply of the system until it is reasonable

4. Supervise and inspect the implementation of the system of the electrical equipment of the user, and ensure the correct use, sensitivity and reliability of the "three protections"

5. Responsible for all kinds of electrical equipment, protection system, seasonal test and daily test in the mine, as well as telemetry of underground protection grounding system, and timely put forward treatment suggestions for problems. Toys

6. Fill in all kinds of inspection records carefully and regularly to ensure that the records are perfect, timely and accurate< (4) responsibilities of explosion-proof inspector: 1. The electric control personnel must receive safety proction ecation and pass the training before they can work with certificates

2. Conct a monthly patrol inspection on the explosion-proof performance and integrity of the explosion-proof electrical equipment and small electrical appliances under the jurisdiction of the whole mine (no less than twice for the high biogas head and no less than once for the low biogas head), contact the responsible unit in time if any problem is found, and track and implement the rectification of the responsible unit

3. For the explosion-proof electrical equipment and small explosion-proof electrical appliances in use underground, the certificate shall be signed once a month, and the certificate shall be renewed once a quarter, and the record of explosion-proof certificate shall be filled in. Supervise and urge the on-site rectification of the equipment that has lost the explosion-proof performance, and have the right to stop using the equipment that refuses to rectify< (1) electrical explosion-proof management

1. Electrical explosion-proof management should have three passes:

(1) shut in: electrical explosion-proof inspector must check the explosion-proof performance of electrical equipment before entering the well, and stick the certificate to enter the well after passing the inspection

(2) daily inspection: the maintenance personnel of the electrical equipment in use must be identified, and the appearance inspection shall be concted once a day, and the problems found shall be handled in time

(3) monthly inspection: the explosion-proof inspector shall inspect the explosion-proof situation of the electrical equipment in the area he is responsible for inspecting once a month, and replace the explosion-proof label once a quarter

2. When repairing electrical equipment, field maintenance electricians should take good care of the attached certificates, and no one is allowed to tear or alter them at will

3. The repaired and newly purchased explosion-proof electrical equipment and small explosion-proof electrical appliances must pass the inspection and acceptance by the explosion-proof inspector, and can only be used in the well after being pasted with certificates

4. The explosion-proof electrical equipment (including small electrical appliances) installed and used in the mine, if one of the following problems occurs, is classified as loss of explosion

(1) the explosion-proof enclosure has cracks, open welding or the thickness is less than 80% of the original design; Cutting and welding the shell; The porous cavity is in collusion; The arc is open; Live without baffle; Lack of explosion-proof suture screw

(2) there is serious corrosion on the explosion-proof joint surface, and there is still obvious rust after being removed with cotton yarn, or there is paint and debris

(3) the clearance of joint surface exceeds the specified value< (4) sand holes with diameter up to 1 mm and depth up to 2 mm appeared on the joint surface of 40 mm, 25 mm and 15 mm; More than 5 per square centimeter; More than two per square centimeter on a 10 mm joint

(5) the width of mechanical scar is up to 0.5 mm, and the length of non damage joint surface is less than 2 / 3 of the specified length< (6) the inner diameter of the sealing ring is 1 mm larger than the outer diameter of the cable; The outer diameter is less than 2mm of the inner diameter of the incoming device (connecting joint); The thickness of the sealing ring is less than 0.7 times of the outer diameter of the cable or the minimum width is less than 10 mm; The sealing thickness is less than 0.3 times of the outer diameter of the cable (except for 70 square mm cable) or the minimum thickness is less than 4 mm

(7) the sealing ring is aged, deteriorated and lost elasticity, or the sleeve is cut and placed on the cable; The sealing ring is broken, but the width and thickness of the broken part can not meet the specified requirements compared with the outer diameter of the cable; It's used for large and small sealing sleeves

(8) the idle inlet nozzle is lack of qualified sealing ring and metal baffle; The thickness of metal baffle is less than 2mm, and the difference between baffle diameter and inner diameter of incoming device is more than 2mm; The sealing ring, baffle and anti ring are placed in reverse order

(9) the contact between the inner edge of the inlet nozzle and the outer end of the sealing ring is not solid; The inner end of the sealing ring is not in solid contact with the vessel wall; The cable and sealing ring can be easily pulled after the inlet nozzle is compacted

(10) the pressure plate type inlet is lack of fixed screws; (11) the control equipment is lack of power failure locking, or the locking device is damaged and does not work

(12) the miner's lamp head is broken and lacks isolation rubber gasket; Lack of locking screw or locking screw does not work; The lamp wire damages the exposed copper wire; The incoming and outgoing lines are not sheathed or sealed< (2) management of the three major protections

1. The electrical administrator shall regularly check, calibrate, test and test the three major protections, and timely notify and handle the problems found

2. For underground short-circuit and over-current protection devices, the electric control personnel shall be responsible for providing the setting value, and send the protection setting value contact list or setting card to the maintenance unit for setting by the full-time electrician, without override trip

3. The underground power supply should have qualified and reliable over-current, grounding and leakage protection devices. When the power supply system is changed, the over-current setting value and leakage detection compensation value should be calculated and adjusted in time. The electric controller shall verify the setting condition and timely modify the relevant contents in the power supply system diagram

4. The switch shall not be hung with open fuse, without fuse tube, and the fuse shall not be hung with copper wire or iron wire

5. With the cooperation of the gas inspector, the maintenance worker and the electrical administrator shall conct a remote test on the leakage protection device in operation or newly installed, and the electrical administrator shall record it for future reference in the first week of each month or before the first power supply

6. The electrical tester of the electric management team shall test the resistance of each local grounding electrode, and record and archive it. If it is found that it does not meet the requirements, it is necessary to contact the responsible unit for rectification in time

7. The main and auxiliary grounding electrodes and connecting wires shall be installed according to regulations, and the total grounding resistance measured from any local grounding device shall not exceed 2 ohm

8. Comprehensive protection device must be used for coal drill and lighting signal; The high voltage feeder of underground central substation must be equipped with selective single-phase grounding protection device; The high-voltage feeder of mobile substation must be equipped with single-phase grounding protection device which selectively acts on tripping< (3) underground power supply management

1. Underground power supply system is reasonable, safe and reliable. The power supply design for the new mining face shall be prepared and approved by the electrical management team of the mechanical and electrical section and the Electrical Assistant mine engineer of the mine. After the installation of the system, the mine dispatching office shall organize the acceptance, and the system can be put into operation only after it is qualified

2. The underground electrical equipment (including cables and small electrical appliances) must be numbered and consistent with the reported power supply system diagram and electrical equipment layout diagram

3. The application permission system must be strictly implemented for the installation and removal of underground electrical equipment and the change of power supply line, that is, the construction unit shall fill in the underground electrical construction application report in triplicate; The content should include: application for construction unit; Person in charge of construction site; Person in charge of site safety; Power off and transmission time, construction project, safety measures; Involving and affecting the scope of power supply. The application can only be implemented after being reviewed by the electric power management team and approved by the general ty officer of the mine<

4. Underground power supply should be three no, four have, two Qi, three complete, one insist:

three no: No "chicken claw", no "sheep tail", no open joint< There are four parts: qualified over-current and leakage protection, screw and spring gasket, sealing ring and baffle, and grounding device<

two Qi: the cable suspension is neat, and the equipment chamber is clean and tidy

three complete: complete protection devices, complete insulation appliances, complete drawings and data< First, insist on the use of electric coal drill, comprehensive protection of lighting and signal

5. Underground explosion-proof switches and transformers should be placed neatly and put on the platform

6. The underground local ventilation supply should achieve "double power supply, double local fans, three special fans and three locking", and the main and standby local fans should be switched automatically

al power supply: special power supply for main local fan; Special power supply for standby local fan or power equipment, standby local fan power supply<

double local fan: special local fan, standby local fan (with the same capacity as special local fan)

three special local fans: special local fan must be powered by special high and low voltage switch, special transformer and special power supply line

three locks: gas and power electrical lock: when the gas exceeds the limit, the power supply of power equipment in the local ventilation area should be cut off immediately; Wind power locking: the special local fan does not work, and the power supply of the power equipment in the local ventilation area cannot be powered on; Local fan locking: the standby local fan power supply shall be connected to the power supply side of the power supply locking switch of the control power equipment. When the special local fan is shut down e to power failure, the local fan can be opened automatically to prevent gas accumulation exceeding the limit