CN210898273U - Mining explosion-proof mobile substation - Google Patents

Mining explosion-proof mobile substation Download PDF

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Publication number
CN210898273U
CN210898273U CN201922075634.4U CN201922075634U CN210898273U CN 210898273 U CN210898273 U CN 210898273U CN 201922075634 U CN201922075634 U CN 201922075634U CN 210898273 U CN210898273 U CN 210898273U
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voltage
low
vacuum switch
switch box
box
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侯宪清
王海滨
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Fushun Special Transformer Manufacturing Co ltd
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Fushun Special Transformer Manufacturing Co ltd
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Abstract

The utility model discloses a mining flame-proof type mobile substation, including taking gyro wheel dry-type transformer, high-pressure vacuum switch box, low pressure guard box, flange, wherein take gyro wheel dry-type transformer to include case shell, case lid, voltage transformer, high-voltage wiring terminal, low pressure binding post, rail wheel, low voltage coil, high-voltage coil winding are on the iron core, and high-pressure vacuum switch box leads to with power frequency three-phase rated voltage, and high-voltage coil medium current produces alternating magnetic field in unshakable in one's determination, and alternating magnetic field induces out the co-frequency electric potential in low voltage coil, produces the electric potential among the low voltage coil alright supply to the load through low pressure guard box. The beneficial effects of the utility model reside in that: the mining explosion-proof mobile substation can move on the track in a mining area by arranging the dry type transformer with the rollers, the high-voltage vacuum switch box and the low-voltage protection box, so that the length of a power supply cable is greatly shortened, the loss on a voltage line is greatly reduced, and the power supply quality is improved.

Description

Mining explosion-proof mobile substation
Technical Field
The utility model relates to a coal mine equipment technical field especially relates to a mining flame-proof type mobile substation.
Background
The equipment consisting of the flameproof movable dry-type transformer, the high-voltage vacuum switch and the low-voltage protection box is generally called as a mining flameproof movable transformer substation.
The mining explosion-proof mobile substation is traditionally provided with a quartz-filled type shell, a radiating fin type shell, a plug tube type shell and the like at home and abroad, which is unfavorable for the mechanical strength of a coil, has the defects of small radiating area of the top part and two side parts, low mechanical strength, more faults and large maintenance and repair amount, so that the equipment has high operation temperature for a long time and short service life; the equipment is easy to burn to cause accidents; the occupation and maintenance of the underground roadway and the use cost of equipment are increased, the operation is inconvenient, and many unsafe factors of complexity exist.
SUMMERY OF THE UTILITY MODEL
The utility model provides a mining flame-proof type mobile substation solves the problem that mining flame-proof type mobile substation performance is low, the trouble is many, the maintenance volume is big, life is short.
The technical scheme of the utility model is that: a mining explosion-proof mobile substation comprises a dry-type transformer with rollers, a high-voltage vacuum switch box, a low-voltage protection box and a connecting flange, wherein the dry-type transformer with rollers is connected with the high-voltage vacuum switch box and the low-voltage protection box through the connecting flange respectively; the high-voltage vacuum switch box is connected with a power frequency three-phase rated voltage, the current in the high-voltage coil generates an alternating magnetic field in the iron core, the alternating magnetic field induces a same-frequency potential in the low-voltage coil, and the potential generated in the low-voltage coil can supply power to a load through the low-voltage protection box.
In the structure, the high-voltage vacuum switch box comprises a high-voltage vacuum switch box explosion-proof box body and an intelligent high-voltage power grid comprehensive protector, the high-voltage vacuum switch box explosion-proof box body comprises a high-voltage vacuum switch box body, a high-voltage vacuum switch box front door, a high-voltage vacuum switch box isolation knife cavity, a high-voltage vacuum switch box wire inlet cavity and a high-voltage vacuum switch box wiring cavity, two high-voltage vacuum switch box cable leading-in devices are respectively arranged on the left side and the right side of the high-voltage vacuum switch box wiring cavity, a high-voltage vacuum switch box locking switch opening and closing interlocking device is arranged on the right side plate of the high-voltage vacuum switch box body, the intelligent high-voltage vacuum switch box comprehensive protector is installed on the inner side of the front door, and a high-voltage vacuum switch box liquid crystal display screen, a high-voltage vacuum, The intelligent comprehensive protector of the high-voltage vacuum switch box is connected with a liquid crystal display screen of the high-voltage vacuum switch box and a voltage transformer circuit of the high-voltage vacuum switch box, a high-voltage cable is connected from a cable leading-in device on one side, passes through the high-voltage vacuum switch of the high-voltage vacuum switch box and a high-voltage vacuum circuit breaker of a permanent magnet mechanism of the high-voltage vacuum switch box, reaches a cable leading-in device on the other side and is led to a high-voltage wiring terminal of the dry type transformer with the roller wheels.
In the structure, after a power supply of the high-voltage vacuum switch box is introduced into a wiring cavity of the high-voltage vacuum switch box, the separation and the combination of the isolation pin shaft and the electrification and the loss of the upper static contact of the voltage transformer and the high-voltage vacuum switch box permanent magnet mechanism high-voltage vacuum circuit breaker are realized through the high-voltage vacuum switch box permanent magnet mechanism high-voltage vacuum circuit breaker, and after the switch is closed, the voltage output by the secondary side of the high-voltage vacuum switch box voltage transformer connected with the high-voltage vacuum switch is set as the control voltage of a high-voltage vacuum switch box system and is used as a working power supply of a high-voltage intelligent protector of the high-voltage vacuum switch box, the;
when the power supply of the high-voltage vacuum switch box is in voltage loss, the voltage loss coil of the high-voltage vacuum circuit breaker of the permanent magnet mechanism of the high-voltage vacuum switch box is released, and the high-voltage vacuum circuit breaker of the permanent magnet mechanism is switched off or can not be switched on; when the isolation bolt of the high-voltage vacuum circuit breaker of the permanent magnet mechanism is closed, the intelligent comprehensive protector of the high-voltage vacuum switch box firstly performs self-checking on the whole system of the high-voltage vacuum switch box, after the high-voltage vacuum switch box system performs self-checking normally, the intelligent comprehensive protector of the high-voltage vacuum switch box protects the high-voltage vacuum switch box to be put into operation, the intelligent comprehensive protector of the high-voltage vacuum switch box outputs control and protection signals to an execution unit to control the unhooking action of the high-voltage vacuum circuit breaker of the permanent magnet mechanism according to the logic relation set by various programs and further ensures that the high-voltage vacuum circuit breaker of the permanent magnet mechanism is separated, thereby realizing overload protection, short-circuit protection, overvoltage protection and undervoltage protection, phase failure protection, overtemperature protection and upper-level power supply emergency stop protection, and simultaneously, a liquid crystal display screen of the high-voltage vacuum switch box displays the fault state, and the system fault of the high-voltage vacuum switch box is monitored in real time.
In the structure, a high-pressure vacuum switch box energy storage shaft, a high-pressure vacuum switch box energy storage handle, a high-pressure vacuum switch box energy storage label, a high-pressure vacuum switch box connection separation shaft, a high-pressure vacuum switch box isolation handle, a high-pressure vacuum switch box pressing plate, a high-pressure vacuum switch box separation and combination label, a high-pressure vacuum switch box locking bolt support, a high-pressure vacuum switch box electric locking device and a high-pressure vacuum switch box locking bolt are arranged on the right side plate of the high-pressure vacuum switch box body, and a high-pressure vacuum switch box elbow, a high-pressure vacuum switch box line pressing cavity assembly, a high-pressure vacuum switch box warning label, a high-pressure vacuum switch box grounding label and a high-pressure vacuum switch box wiring port cover plate are arranged on.
In the structure, the low-voltage protection box comprises a low-voltage protection box body, a low-voltage protection box door and a low-voltage protection box cover plate, wherein the low-voltage protection box body is a cuboid, hinge mechanisms are arranged on the low-voltage protection box body and the low-voltage protection box door, the low-voltage protection box body is hinged with the low-voltage protection box door, the low-voltage protection box body is provided with a low-voltage protection box intermediate partition plate, the low-voltage protection box intermediate partition plate partitions the whole low-voltage protection box body into a low-voltage protection box wiring cavity and a low-voltage protection box explosion-proof cavity, two cable leading-in devices are respectively arranged on the left side and the right side of the low-voltage protection box wiring cavity, the low-voltage protection box explosion-proof cavity is provided with a signal sampling unit, the signal sampling unit comprises a voltage transformer and a current transformer, and a low-voltage, the intelligent comprehensive protector is characterized in that a low-voltage protection device is arranged in a box door of the low-voltage protection box, a low-voltage protection box intelligent comprehensive protector is arranged on the inner side of a box door panel of the low-voltage protection box, a low-voltage protection box liquid crystal display used for displaying the operation state and various fault states of the protection box is arranged on the box door panel of the low-voltage protection box, and a low-voltage protection box functional operation button and a low-voltage protection box parameter setting button used for realizing overload, short circuit, electric leakage, reset and electric separation of the low-voltage protection box are arranged, a high-voltage cable is connected from a high-voltage side cable leading-in device and is led out from the low-voltage side cable leading-in device through a high-voltage vacuum switch, a voltage;
the high-voltage vacuum switch box voltage transformer connected with the high-voltage vacuum switch provides power to be input to the low-voltage side through a transformer four-core wiring terminal and used as a working power supply of the intelligent low-voltage protection device of the low-voltage protection box;
the intelligent comprehensive protector of the low-voltage protection box monitors and displays states of a main loop, control loop voltage, current, insulation and the like of the low-voltage protection box in real time, outputs and displays faults according to logic relations set by various programs, transmits protection signals to a protection module of a high-voltage vacuum switch at the same time, drives a vacuum circuit breaker to trip, and implements overload protection, short-circuit protection, leakage locking, overvoltage protection and undervoltage protection on a low-voltage protection box system.
In the above structure, the low voltage protection device includes high voltage side circuit breaker, protective relay, high voltage switch, vacuum circuit breaker, the low voltage protection device sets up to: when the switching-on and switching-off handle of the low-voltage protection box rotates to the 'off' position, the high-voltage side circuit breaker is controlled to trip through the signal line and is locked through the protection relay, so that the non-voltage release coil of the vacuum circuit breaker cannot be attracted, and the high-voltage switch is guaranteed to be switched on only when the low-voltage protection box is in a normal operation state.
In the structure, the overload protection of the low-voltage protection box is that the intelligent comprehensive protector of the low-voltage protection box processes the signal sent by the current transformer and compares the processed signal with a set protection value, when the protection value is reached, the power is cut off in a delayed mode according to the corresponding time, and meanwhile, the liquid crystal display screen of the low-voltage protection box displays an overload fault; the short-circuit protection of the low-voltage protection box is that the intelligent comprehensive protector of the low-voltage protection box compares a set short-circuit current protection value after processing and calculation according to a signal sent by a current transformer, and immediately protects power failure when the short-circuit current protection value is greater than the short-circuit current value, and simultaneously, a liquid crystal display screen of the low-voltage protection box displays a short-circuit fault; the low-voltage protection box overvoltage protection and undervoltage protection is that the low-voltage protection box intelligent comprehensive protector samples the voltage of AC12V output by the secondary side of a voltage transformer and transmits the voltage as a voltage signal to the low-voltage protection box intelligent comprehensive protector, the voltage signal is compared with the set voltage after signal processing, when the sampled voltage is lower than 75% of the rated voltage or higher than 115% of the rated voltage, the low-voltage protection box intelligent comprehensive protector outputs a signal to control the disconnection of the high-voltage vacuum circuit breaker after the set time delay, and meanwhile, a liquid crystal display screen of the low-voltage protection box displays 'overvoltage fault' or 'undervoltage fault'.
In the above structure, the leakage protection and the leakage locking of the low-voltage protection box are realized by the intelligent integrated protector of the low-voltage protection box by adopting an additional direct-current power supply, when the system leakage or the insulation value of the low-voltage protection box is reduced, the current of the additional direct-current power supply of the intelligent integrated protector of the low-voltage protection box returns to the intelligent integrated protector of the low-voltage protection box through the equipment shell, the earth, the cable, the three-phase reactor and the zero-sequence reactor, when the leakage signal is greater than the internal leakage protection or leakage locking regulation, the intelligent integrated protector of the low-voltage protection box performs the protection action, the output signal is sent to the high-voltage side, and meanwhile, the liquid crystal display screen of the low-voltage protection box displays the leakage protection or the leakage locking.
In the structure, the case lid is provided with the rings that are used for overhauing and lift the case lid when assembling, the lower part of case shell is equipped with the rings that lift by crane whole usefulness, is used for the earth bolt who switches on with ground, the case shell both sides are equipped with flange, rail wheel's gauge is 900/600 mm.
The beneficial effects of the utility model reside in that: through setting up and taking gyro wheel dry-type transformer, high-pressure vacuum switch box, low pressure guard box, make this kind of mining flame-proof type mobile substation can track removal in the mining area, greatly ensured the length that has shortened supply cable, reduce the loss on the reduction voltage circuit by a wide margin, improve the power supply quality, specifically have following several:
1. because the mobile substation has explosion-proof and moisture-proof properties, the mobile substation is suitable for places with humid environment, gas and coal dust and explosion risks.
2. The mobile substation is arranged at a position 50-300 m away from the coal mining surface, so that the power supply cable is greatly shortened, the voltage loss can be greatly reduced, and the power supply quality is improved.
3. The mobile substation is integrally arranged on the trolley or on the track, and is convenient to detach, move and install underground.
4. The temperature of the mobile substation and the matched dry-type mobile transformer has perfect overload, short circuit and leakage protection, and an electric appliance interlocking and mechanical interlocking device is arranged between the high-voltage switch and the low-voltage switch and between the high-voltage switch and the upper-stage circuit breaker.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a front view of the present invention;
FIG. 2 is a front view of a high voltage vacuum switch cabinet;
FIG. 3 is a cross-sectional view of a high voltage vacuum switch box;
FIG. 4 is a left side view of the high voltage vacuum switch box;
FIG. 5 is a front view of the low pressure protective case;
FIG. 6 is a cross-sectional view of the low pressure protection tank;
FIG. 7 is a left side view of the low pressure protection tank;
FIG. 8 is a front view of the track transformer;
FIG. 9 is a left side view of the track transformer;
fig. 10 is a right side view of the track transformer.
In the figure: 1-rail transformer, 2-low voltage protection box, 3-high voltage vacuum switch box, 4-rail wheel, 5-connecting flange, 6-high voltage connecting terminal, 7-low voltage connecting terminal, 8-high voltage vacuum switch box hinge mechanism, 9-high voltage vacuum switch box nameplate, 10-high voltage vacuum switch box parameter setting button, 11-high voltage vacuum switch box liquid crystal display screen, 12-high voltage vacuum switch box function operating button, 13-high voltage vacuum switch box isolating handle, 14-high voltage vacuum switch box energy storage handle, 15-static contact, 16-high voltage vacuum switch box energy storage label, 17-high voltage vacuum switch box deciliter label, 18-high voltage vacuum switch box buckle ring, 19-high voltage vacuum switch box buckle cap, 20-high voltage permanent magnet switch box mechanism high voltage vacuum circuit breaker, 21-front door of high-voltage vacuum switch box, 22-box body of high-voltage vacuum switch box, 23-low-voltage protection box low-voltage side cable leading-in device, 24-high-voltage side cable leading-in device of low-voltage protection box, 25-liquid crystal display screen of low-voltage protection box, 26-parameter setting button of low-voltage protection box, 27-functional operation button of low-voltage protection box, 28-hinge mechanism of low-voltage protection box, 29-explosion-proof cavity of low-voltage protection box, 30-interlocking screw rod of low-voltage protection box, 31-opening and closing handle of low-voltage protection box, 32-opening and closing of low-voltage protection box, 33-wiring cavity of low-voltage protection box, 34-current transformer, 35-signal sampling unit of low-voltage protection box, 36-snap ring of low-voltage protection box, 37-snap cap of low, 40-ground bolt.
Detailed Description
The invention is further described with reference to the following figures and examples.
Referring to the attached drawings, the utility model discloses a mining flame-proof type mobile substation, including taking gyro wheel dry-type transformer 1, high-pressure vacuum switch box 3, low pressure guard box 2, flange 5, wherein gyro wheel dry-type transformer 1 is connected through flange 5 with high-pressure vacuum switch box 3, low pressure guard box 2 respectively, take gyro wheel dry-type transformer 1 including case shell 38, case lid 39, voltage transformer, high-pressure binding post, low pressure binding post, rail wheel, the iron core is the cold rolling orientation lamination silicon steel of multistage marching type full-oblique seam, low pressure coil, high pressure coil winding are on the iron core, high pressure vacuum switch box 3 is connected with high pressure coil after being connected with high pressure binding post, low pressure guard box 2 is connected with low pressure coil after being connected with low pressure binding post; the high-voltage vacuum switch box 3 is connected with a power frequency three-phase rated voltage, the current in the high-voltage coil generates an alternating magnetic field in the iron core, the alternating magnetic field induces a same-frequency potential in the low-voltage coil, and the potential generated in the low-voltage coil can supply power to a load through the low-voltage protection box 2.
Preferably, the high-voltage vacuum switch box 3 comprises a high-voltage vacuum switch box explosion-proof box body and a high-voltage vacuum switch box intelligent high-voltage power grid comprehensive protector, the high-voltage vacuum switch box explosion-proof box body comprises a high-voltage vacuum switch box body 22, a high-voltage vacuum switch box front door 21, a high-voltage vacuum switch box isolation knife cavity, a high-voltage vacuum switch box wire inlet cavity and a high-voltage vacuum switch box wiring cavity, the left side and the right side of the high-voltage vacuum switch box wiring cavity are respectively provided with two high-voltage vacuum switch box cable leading-in devices, a high-voltage vacuum switch box locking switch opening-closing interlocking device is arranged on the right side plate of the high-voltage vacuum switch box body 22, the high-voltage vacuum switch box intelligent comprehensive protector is installed on the inner side of the front door, and the high-voltage vacuum switch box liquid crystal display screen 11, the intelligent comprehensive protector is characterized by further comprising a high-voltage vacuum switch box function operating button 12 and a high-voltage vacuum switch box parameter setting button 10, wherein the high-voltage vacuum switch box function operating button 12 and the high-voltage vacuum switch box parameter setting button 10 are used for realizing overload, short circuit, reset, emergency stop, electric connection, electric separation and manual separation, the intelligent comprehensive protector of the high-voltage vacuum switch box is in circuit connection with a high-voltage vacuum switch box liquid crystal display screen 11 and a high-voltage vacuum switch box voltage transformer, and a high-voltage cable is connected from a cable leading-in device on one side, passes through a high-voltage vacuum switch of the high-voltage vacuum switch box and a high-voltage vacuum switch box permanent.
Preferably, after a power supply of the high-voltage vacuum switch box 3 is introduced into a wiring cavity of the high-voltage vacuum switch box, the separation and combination of an isolation pin shaft and the electrification and the loss of the upper static contact 15 of the voltage transformer and the high-voltage vacuum switch box permanent magnet mechanism high-voltage vacuum circuit breaker 20 are realized through the high-voltage vacuum switch box permanent magnet mechanism high-voltage vacuum circuit breaker 20, and after the switch is closed, the voltage output by the secondary side of the high-voltage transformer connected with the high-voltage vacuum switch is set as the control voltage of a high-voltage vacuum switch box system and is used as a working power supply of a high-voltage intelligent protector of the high-voltage vacuum switch box, the high-voltage;
when the power supply of the high-voltage vacuum switch box 3 loses voltage, the high-voltage vacuum circuit breaker 20 of the permanent magnet mechanism of the high-voltage vacuum switch box releases a voltage loss coil, and the high-voltage vacuum circuit breaker of the permanent magnet mechanism is switched off or can not be switched on; when the isolation bolt of the high-voltage vacuum circuit breaker of the permanent magnet mechanism is closed, the intelligent comprehensive protector of the high-voltage vacuum switch box firstly performs self-checking on the whole system of the high-voltage vacuum switch box, after the high-voltage vacuum switch box system performs self-checking normally, the intelligent comprehensive protector of the high-voltage vacuum switch box protects the high-voltage vacuum switch box to be put into operation, the intelligent comprehensive protector of the high-voltage vacuum switch box outputs control and protection signals to an execution unit to control the unhooking action of the high-voltage vacuum circuit breaker of the permanent magnet mechanism according to the logic relation set by various programs and further ensures that the high-voltage vacuum circuit breaker of the permanent magnet mechanism is separated, thereby realizing overload protection, short-circuit protection, overvoltage protection and undervoltage protection, phase failure protection, overtemperature protection and upper-level power supply emergency stop protection, and simultaneously, a liquid crystal display screen of the high-voltage vacuum switch box displays the fault state, and the system fault of the high-voltage vacuum switch box is monitored in real time.
The high-pressure vacuum switch box comprises a high-pressure vacuum switch box body 22 and is characterized in that a right side plate of the high-pressure vacuum switch box body 22 is provided with a high-pressure vacuum switch box energy storage shaft, a high-pressure vacuum switch box energy storage handle 14, a high-pressure vacuum switch box energy storage label 16, a high-pressure vacuum switch box connection isolation shaft, a high-pressure vacuum switch box isolation handle 13, a high-pressure vacuum switch box pressing plate, a high-pressure vacuum switch box split label 17, a high-pressure vacuum switch box locking bolt support, a high-pressure vacuum switch box electric locking device and a high-pressure vacuum switch box locking bolt, a left side plate of the high-pressure vacuum switch box body 22 is provided with a high-pressure vacuum switch box elbow, a high-pressure vacuum switch box line cavity assembly, a high-pressure vacuum switch box warning label, a high-pressure vacuum switch box grounding label.
Preferably, the low-voltage protection box comprises a low-voltage protection box body, a low-voltage protection box door and a low-voltage protection box cover plate, the low-voltage protection box body is a cuboid, the low-voltage protection box body and the low-voltage protection box door are provided with hinge mechanisms, the low-voltage protection box body is hinged with a front door of the low-voltage protection box, the low-voltage protection box body is provided with a low-voltage protection box intermediate partition plate, the low-voltage protection box intermediate partition plate partitions the whole low-voltage protection box body into a low-voltage protection box wiring cavity 33 and a low-voltage protection box explosion-proof cavity 29, the left side and the right side of the low-voltage protection box wiring cavity 33 are respectively provided with two cable lead-in devices, the low-voltage protection box explosion-proof cavity 29 is provided with a signal sampling unit 35, the signal sampling unit 35 comprises a voltage transformer and a current transformer 34, and a low-, the intelligent low-voltage protection box comprises a low-voltage protection box door, a low-voltage protection box intelligent comprehensive protector, a low-voltage protection box liquid crystal display 25, a low-voltage protection box functional operation button 27 and a low-voltage protection box parameter setting button 26, wherein the low-voltage protection box intelligent comprehensive protector is arranged in the low-voltage protection box door, the low-voltage protection box intelligent comprehensive protector is used for displaying the operation state and various fault states of the protection box, the low-voltage protection box liquid crystal display 25 is arranged on the low-voltage protection box door, the low-voltage protection box liquid crystal display 27 is used for realizing overload, short circuit, electric leakage, reset and electric distribution of low-voltage protection box functional operation buttons 27 and the low-voltage protection box parameter setting button 26 are arranged on the low-voltage protection box door, a high-voltage cable is connected;
the voltage transformer connected with the high-voltage vacuum switch provides power to be input to the low-voltage side through a four-core wiring terminal of the transformer, and the power is used as a working power supply of the intelligent low-voltage protector of the low-voltage protection box;
the intelligent comprehensive protector of the low-voltage protection box monitors and displays states of a main loop, control loop voltage, current, insulation and the like of the low-voltage protection box in real time, outputs and displays faults according to logic relations set by various programs, transmits protection signals to a protection module of a high-voltage vacuum switch at the same time, drives a vacuum circuit breaker to trip, and implements overload protection, short-circuit protection, leakage locking, overvoltage protection and undervoltage protection on a low-voltage protection box system.
Preferably, the low-voltage protection box locking switch on-off device comprises a low-voltage protection box interlocking screw 30, a low-voltage protection box door and a low-voltage protection box on-off switch 32, the low-voltage protection box interlocking screw 30 is connected with the low-voltage protection box on-off switch 32, the low-voltage protection box interlocking screw 30 is connected with a bolt of the low-voltage protection box door, and the low-voltage protection box locking switch on-off device is set as follows: when the high-voltage vacuum switch is in a switching-on position, the door of the low-voltage protection box cannot be opened; when the door of the low-voltage protection box is opened, the high-voltage vacuum switch cannot be switched on.
Preferably, the low-voltage protection device comprises a high-voltage side circuit breaker, a protection relay, a high-voltage switch and a vacuum circuit breaker, and the low-voltage protection device is set as follows: when the low-voltage protection box opening and closing handle 31 rotates to the 'separating' position, the high-voltage side circuit breaker is controlled to trip through the signal line and is locked through the protection relay, so that the non-voltage release coil of the vacuum circuit breaker cannot be attracted, and the high-voltage switch is guaranteed to be closed only when the low-voltage protection box is in a normal operation state.
Preferably, the overload protection of the low-voltage protection box is that the intelligent comprehensive protector of the low-voltage protection box processes a signal sent by the current transformer and compares the processed signal with a set protection value, when the protection value is reached, the power is delayed and cut off according to corresponding time, and simultaneously, the liquid crystal display screen 25 of the low-voltage protection box displays an overload fault; the short-circuit protection of the low-voltage protection box is that the intelligent comprehensive protector of the low-voltage protection box compares a set short-circuit current protection value after processing and calculation according to a signal sent by a current transformer, and immediately protects power failure when the short-circuit current protection value is larger than the short-circuit current value, and simultaneously, a liquid crystal display screen 25 of the low-voltage protection box displays a short-circuit fault; the low-voltage protection box overvoltage protection and undervoltage protection is that the low-voltage protection box intelligent comprehensive protector samples the voltage of AC12V output by the secondary side of the voltage transformer and transmits the voltage signal to the low-voltage protection box intelligent comprehensive protector, the voltage signal is compared with the set voltage after signal processing, when the sampled voltage is lower than 75% of the rated voltage or higher than 115% of the rated voltage, the low-voltage protection box intelligent comprehensive protector outputs a signal to control the disconnection of the high-voltage vacuum circuit breaker after the set time delay, and meanwhile, the low-voltage protection box liquid crystal display screen 25 displays 'overvoltage fault' or 'undervoltage fault'. The leakage protection and leakage locking of the low-voltage protection box are realized by the intelligent comprehensive protector of the low-voltage protection box by adopting an additional direct-current power supply, when the system leakage or insulation value of the low-voltage protection box is reduced, the current of the additional direct-current power supply of the intelligent comprehensive protector of the low-voltage protection box returns to the intelligent comprehensive protector of the low-voltage protection box through an equipment shell, the earth, a cable, a three-phase reactor and a zero-sequence reactor, when a leakage signal is greater than the internal leakage protection or leakage locking regulation, the intelligent comprehensive protector of the low-voltage protection box performs protection action, outputs a signal to a high-voltage side, and simultaneously, a liquid crystal display 25 of the low-voltage protection box displays leakage protection or leakage locking.
Preferably, the intelligent comprehensive protector of the low-voltage protection box comprises a DSP chip for acquiring signals and processing interruption, a high-voltage vacuum circuit breaker for interrupting electric leakage and short-circuit protection and an RS485 chip with a communication function, wherein the DSP chip is in circuit connection with the high-voltage vacuum circuit breaker and the RS485 chip and is used for monitoring and displaying the voltage and current insulation state in a main protection loop in real time by adopting an advanced PLC; the control button is directly received on the DI point that adopts advanced PLC, realizes text picture's switching and parameter setting through PLC's DI point, and the product can more freely set up the button trompil position on the explosion-proof switch casing door, and it is more convenient to expand than other products can not freely set up button trompil position.
Preferably, the box cover is provided with a lifting ring for lifting the box cover during maintenance and assembly, the lower part of the box shell is provided with a lifting ring for lifting the whole body and a grounding bolt 40 for communicating with the ground, and two sides of the box shell are provided with connecting flanges 5.
Preferably, the side wall of the box housing 38 is a corrugated steel plate, the cover 39 and the bottom plate of the box housing 38 are circular arc-shaped thick steel plates, and a plurality of positions of the box housing 38 are provided with reinforcing belts, reinforcing ribs and reinforcing angle steels.
Preferably, the voltage transformer is provided with a temperature monitoring element, and the voltage transformer is provided with a hanging core structure design for preventing the product from generating internal looseness in the transportation process.
Preferably, the high-voltage wiring terminal 6 is led out by adopting a cable, and the low-voltage wiring terminal 7 is led out by adopting a cable or a copper bus.
Preferably, the surfaces of the low-voltage coil and the high-voltage coil are wrapped and insulated by Nomex paper with C-level insulation and fixed by adopting press nails and porcelain press blocks.
Preferably, the notch of the iron core is coated with antirust liquid, and the surface of the iron core is coated with high-temperature-resistant antirust moisture-proof paint.
Preferably, the gauge of the rail wheel is 900/600 mm.
The utility model discloses structural design has been done in the place that needs vacuum flame proof: the rough surface processing illumination of the explosion-proof joint surfaces of the explosion-proof flanges and parts reaches a value of 6.3 or 3.2, the size gaps of the explosion-proof joint surfaces are smaller than 0.35mm, an explosion-proof vacuum cavity (chamber) is formed, and the explosion-proof performance of the explosion-proof joint surfaces meets the national standard GB 8286-2010.
In one implementation, the track gauge of the rail wheel is a standard rail gauge, such that the mobile transformer is able to travel on a railroad in a mine.
In one embodiment, the intelligent comprehensive protector for the low-voltage protection box and the intelligent comprehensive protector for the high-voltage vacuum switch box can be combined into an intelligent comprehensive protector.
The above description is only the preferred embodiment of the present invention, but not limiting the scope of the present invention, and all the equivalent structures or equivalent flow transformations made by using the contents of the specification and the drawings are directly or indirectly applied to other related technical fields, and all belong to the protection scope of the present invention.

Claims (5)

1. A mining flame-proof type mobile substation is characterized in that: the high-voltage transformer comprises a dry transformer with rollers, a high-voltage vacuum switch box, a low-voltage protection box and a connecting flange, wherein the dry transformer with rollers is connected with the high-voltage vacuum switch box and the low-voltage protection box through the connecting flange respectively; the high-voltage vacuum switch box is connected with a power frequency three-phase rated voltage, the current in the high-voltage coil generates an alternating magnetic field in the iron core, the alternating magnetic field induces a same-frequency potential in the low-voltage coil, and the potential generated in the low-voltage coil can supply power to a load through the low-voltage protection box.
2. The mining flameproof mobile substation according to claim 1, characterized in that: the high-voltage vacuum switch box comprises a high-voltage vacuum switch box explosion-proof box body and an intelligent high-voltage power grid comprehensive protector, the high-voltage vacuum switch box explosion-proof box body comprises a high-voltage vacuum switch box body, a high-voltage vacuum switch box front door, a high-voltage vacuum switch box isolation knife cavity, a high-voltage vacuum switch box wire inlet cavity and a high-voltage vacuum switch box wiring cavity, two high-voltage vacuum switch box cable leading-in devices are respectively arranged on the left side and the right side of the high-voltage vacuum switch box wiring cavity, a high-voltage vacuum switch box locking switch opening and closing interlocking device is arranged on the right side plate of the high-voltage vacuum switch box body, the intelligent high-voltage vacuum switch box comprehensive protector is installed on the inner side of the front door, a high-voltage vacuum switch box liquid crystal display screen for displaying the operation state and various fault states of the high-voltage, The intelligent comprehensive protector of the high-voltage vacuum switch box is connected with a liquid crystal display screen of the high-voltage vacuum switch box and a voltage transformer circuit of the high-voltage vacuum switch box, a high-voltage cable is connected from a cable leading-in device on one side, passes through the high-voltage vacuum switch of the high-voltage vacuum switch box and a high-voltage vacuum circuit breaker of a permanent magnet mechanism of the high-voltage vacuum switch box, reaches the high-voltage vacuum circuit breaker on the other side, and is led to a high-voltage wiring terminal of the dry type transformer with the roller.
3. The mining flameproof mobile substation according to claim 1, characterized in that: the case lid is provided with the rings that lift by crane the case lid when being used for overhauing and assembling, the lower part of case shell is equipped with rings, the earth bolt that is used for switching on with ground that lifts by crane holistic usefulness, the case shell both sides are equipped with flange, rail wheel's gauge is 900/600 mm.
4. The mining flameproof mobile substation according to claim 2, characterized in that: the high-pressure vacuum switch box comprises a high-pressure vacuum switch box body and is characterized in that a right side plate of the high-pressure vacuum switch box body is provided with a high-pressure vacuum switch box energy storage shaft, a high-pressure vacuum switch box energy storage handle, a high-pressure vacuum switch box energy storage label, a high-pressure vacuum switch box connection separation shaft, a high-pressure vacuum switch box isolation handle, a high-pressure vacuum switch box pressing plate, a high-pressure vacuum switch box separation label, a high-pressure vacuum switch box locking bolt support, a high-pressure vacuum switch box electric locking device and a high-pressure vacuum switch box locking bolt, and a left side plate of the high-pressure vacuum switch box body is provided with a high-pressure vacuum switch box elbow, a high-pressure vacuum switch box line pressing cavity assembly.
5. The mining flameproof mobile substation according to claim 1, characterized in that: the low-voltage protection box comprises a low-voltage protection box body, a low-voltage protection box door and a low-voltage protection box cover plate, wherein the low-voltage protection box body is a cuboid, the low-voltage protection box body and the low-voltage protection box door are provided with hinge mechanisms, the low-voltage protection box body is hinged with the low-voltage protection box door, the low-voltage protection box body is provided with a low-voltage protection box intermediate partition plate, the low-voltage protection box intermediate partition plate partitions the whole low-voltage protection box body into a low-voltage protection box wiring cavity and a low-voltage protection box explosion-proof cavity, the left side and the right side of the low-voltage protection box wiring cavity are respectively provided with two cable leading-in devices, the low-voltage protection box explosion-proof cavity is provided with a signal sampling unit, the signal sampling unit comprises a voltage transformer and a current transformer, and a low-voltage, the intelligent integrated protector is characterized in that a low-voltage protection device is arranged in a low-voltage protection box door, an intelligent integrated protector of the low-voltage protection box is installed on the inner side of a panel of the low-voltage protection box door, a low-voltage protection box liquid crystal display screen used for displaying the running state and various fault states of the protection box is arranged on the panel of the low-voltage protection box door, and the intelligent integrated protector is provided with a low-voltage protection box functional operation button and a low-voltage protection box parameter setting button for realizing overload, short circuit, electric leakage, reset and electric distribution, wherein a high-voltage cable is connected from a high-voltage side cable leading-in device and is led out from the low-voltage side cable leading-in device through a high-voltage vacuum switch, a voltage transformer and a.
CN201922075634.4U 2019-11-27 2019-11-27 Mining explosion-proof mobile substation Active CN210898273U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112366581A (en) * 2020-12-02 2021-02-12 盐城奇林电气有限公司 Intelligent coal mine explosion-proof protective transformer substation
CN112448303A (en) * 2020-11-13 2021-03-05 盐城威达变压器制造有限公司 Mining explosion-proof mobile substation
CN112466613A (en) * 2020-11-13 2021-03-09 盐城威达变压器制造有限公司 Mining explosion-proof dry-type transformer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112448303A (en) * 2020-11-13 2021-03-05 盐城威达变压器制造有限公司 Mining explosion-proof mobile substation
CN112466613A (en) * 2020-11-13 2021-03-09 盐城威达变压器制造有限公司 Mining explosion-proof dry-type transformer
CN112366581A (en) * 2020-12-02 2021-02-12 盐城奇林电气有限公司 Intelligent coal mine explosion-proof protective transformer substation

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