Mining flame-proof and intrinsic safety type high-voltage vacuum power distribution device

Abstract

The utility model provides a mining flame-proof and intrinsic safety type high-voltage vacuum power distribution device, and belongs to the technical field of mining power supply systems. The technical problems that a mining power supply system is poor in power supply automation and does not have economical efficiency are solved. In order to solve the technical problem, the technical scheme adopted by the utility model is as follows: the device comprises a shell, a wire inlet cavity is arranged in the shell, a three-phase power supply introduced by the wire inlet cavity is connected with a piezoresistor RV and a high-voltage fuse in parallel, the high-voltage fuse is electrically connected with a three-phase five-column voltage transformer TV, the primary side of the three-phase five-column voltage transformer TV is electrically connected with a primary resonance eliminator, and the secondary side of the three-phase five-column voltage transformer TV is electrically connected with a secondary resonance eliminator. The primary resonance eliminator is grounded, the secondary side of the three-phase five-column voltage transformer TV is electrically connected with a comprehensive protector ZB and a three-phase rectifier bridge ZLQ, the comprehensive protector is provided with a power distribution handcart monitoring signal end and a standby terminal, and the comprehensive protector is electrically connected with a display device and an external direct-current power supply; the utility model is applied to the mining power distribution system.

Description

Technical Field

[0001] The utility model provides a mine-used flameproof and intrinsically safe high-voltage vacuum power distribution device, belonging to the technical field of mine power supply systems. Background Art

[0002] In the underground power supply system of coal mines, three-phase five-column voltage transformers are used as measuring elements for three-phase voltage and zero-sequence voltage. They are widely used in a variety of products with 10kV and 6kV voltage levels, providing control power, measurement voltage signals and protection voltage signals for integrated protection devices.

[0003] With the development of the coal industry and the upgrading and transformation of the intelligent power supply integrated control system of coal mines, underground substations in coal mines have gradually realized unmanned operation, forming an integrated control mode based on a comprehensive control platform. At present, each existing high-voltage distribution cabinet is equipped with a three-phase five-column voltage transformer to provide control power to the equipment separately. When power is turned on, the distribution trolley needs to be manually moved into the working position, which has poor automation. In addition, installing a voltage transformer in each high-voltage cabinet is also a burden for the enterprise and is not economical. Utility Model Content

[0004] In order to solve the technical problems of poor power supply automation and lack of economy in mine power supply systems, the utility model proposes a mine flameproof and intrinsically safe high-voltage vacuum power distribution device, and aims to improve the automation of mine power distribution and save costs by improving the hardware structure of the mine flameproof and intrinsically safe high-voltage vacuum power distribution voltage transformer and / or the combined connection of circuits.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a mine flameproof and intrinsically safe high-voltage vacuum power distribution device, including a shell, a line inlet cavity is arranged in the shell, a three-phase power supply introduced by the line inlet cavity is connected with a varistor RV and a high-voltage fuse, the high-voltage fuse is electrically connected with a three-phase five-column voltage transformer TV, the primary side of the three-phase five-column voltage transformer TV is electrically connected with a primary harmonic eliminator, the primary harmonic eliminator is grounded, the secondary side of the three-phase five-column voltage transformer TV is electrically connected to the 204 terminal of the comprehensive protector ZB and then grounded, and the 204 terminal of the comprehensive protector ZB is short-circuited with the 206 terminal of the comprehensive protector ZB;

[0006] The secondary side of the three-phase five-column voltage transformer TV is also electrically connected to a circuit breaker QF1, which has four outgoing terminals, namely, terminal A601, terminal B601, terminal C601 and terminal L601;

[0007] The A601 terminal is connected in parallel with one end of the fuse FU4 and the input end of the three-phase rectifier bridge ZLQ, the B601 terminal is connected in parallel with one end of the fuse FU5 and the input end of the three-phase rectifier bridge ZLQ, the C601 terminal is connected in parallel with one end of the fuse FU6 and the input end of the three-phase rectifier bridge ZLQ, the L601 terminal is connected in series with the fuse FU7 and then electrically connected to the 205 terminal of the integrated protector ZB, and the other end of the FU4, the other end of the FU5 and the other end of the FU6 are connected to the voltage signal end of the integrated protector ZB;

[0008] The output end of the three-phase rectifier bridge ZLQ is connected in series with the normally closed contact of the circuit breaker QF3 and the relay ZJ2, and is connected to the power supply end of the integrated protector ZB, the power module KGDY1 and the power module KGDY2. The power module KGDY1 is connected to the detection equipment, the lighting equipment and the display equipment. The power module KGDY2 is electrically connected to the isolation safety gate GL; the 303 terminal of the integrated protector and the 304 terminal of the integrated protector are electrically connected to the isolation safety gate GL, and the isolation safety gate GL is electrically connected to the intrinsic safety circuit;

[0009] The DC power source introduced by the incoming line cavity is connected in series with the switch SA2, the circuit breaker QF2, the coil of the relay ZJ2, the normally open contact of the circuit breaker QF2, and then connected to the power module KGDY1, the power module KGDY2 and the power supply end of the integrated protector ZB;

[0010] The display device includes a common terminal and a plurality of power distribution cart signal terminals, each of which is electrically connected to a button and then connected to the common terminal;

[0011] The 311 terminal of the integrated protector ZB is electrically connected to the trolley entry switch S9 and then connected to the common end. The 310 terminal of the integrated protector ZB is electrically connected to the trolley entry switch S9 and the circuit breaker QF2 and then connected to the common end. The 412 terminal of the integrated protector ZB and the 413 terminal of the integrated protector ZB are electrically connected to the distribution trolley.

[0012] The integrated protector ZB is provided with a spare terminal, and the spare terminal is electrically connected to the high-voltage distribution cabinet.

[0013] Furthermore, the terminal 314 of the integrated protector ZB is electrically connected to the normally open contact of the relay ZJ1 and then connected to the common terminal.

[0014] The terminal 404 of the integrated protector ZB, the terminal 405 of the integrated protector ZB, the terminal 407 of the integrated protector ZB and the terminal 408 of the integrated protector ZB are electrically connected to the local opening circuit;

[0015] The 406 terminal of the integrated protector ZB is connected in series with a button SB8 and then connected to the remote control switch, and the 407 terminal of the integrated protector ZB is connected in parallel to the local opening circuit and the coil of the relay ZJ1;

[0016] The A601 terminal, the B601 terminal, the C601 terminal and the L601 terminal are electrically connected to the normally open switch of the relay ZJ1 and are connected to a plurality of high open voltage signals.

[0017] Furthermore, the terminal 306 of the integrated protector ZB is electrically connected to the remote closing switch and connected to the common end, the terminal 307 of the integrated protector ZB is electrically connected to the remote opening switch and connected to the common end, the terminal 308 of the integrated protector ZB is electrically connected to the wind power input switch and connected to the common end, the terminal 309 of the integrated protector ZB is electrically connected to the gas input switch and connected to the common end, and the terminal 312 of the integrated protector ZB is electrically connected to the trolley retreat switch and connected to the common end.

[0018] Furthermore, the distribution trolley signal terminal includes a trolley forward signal terminal, a trolley backward signal terminal, a trolley downward signal terminal, a trolley upward signal terminal, a confirmation signal terminal and a reset signal terminal.

[0019] Furthermore, the varistor RV is grounded.

[0020] Furthermore, the model of the high-voltage fuse is RN2 series.

[0021] Furthermore, the model of the primary detuning device is LXQ series.

[0022] Furthermore, the model of the integrated protector ZB is ZBT series.

[0023] The beneficial effects of the present invention compared with the prior art are as follows:

[0024] 1. A primary detuning device is provided in the utility model, which can effectively eliminate the ferromagnetic resonance generated by the three-phase five-column voltage transformer during operation, protect the stable operation of the three-phase five-column voltage transformer, reduce the loss of the three-phase five-column voltage transformer, and improve the measurement accuracy of the utility model;

[0025] 2. The utility model can be connected to an external DC power supply to power the power module, integrated protection device, camera and other monitoring equipment in the utility model, which is more economical than three-phase AC power supply;

[0026] 3. Multiple high-voltage distribution cabinets can be electrically connected through the spare terminals of the utility model, so that one utility model can control multiple high-voltage distribution cabinets;

[0027] 4. The utility model can realize local control and remote control of the power distribution trolley, and enhance the automation level of the power distribution system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The utility model is further described below in conjunction with the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the electrical principle structure of the utility model;

[0030] Figure 2 This is the wiring schematic diagram of the utility model. DETAILED DESCRIPTION

[0031] like Figure 1 to Figure 2 As shown, the utility model provides a mining explosion-proof and intrinsically safe high-voltage vacuum power distribution device, including a shell, the shell includes an equipment cavity, an incoming line cavity, an outgoing line cavity and a bracket, the three-phase power supply introduced by the incoming line cavity is connected with a varistor RV and a high-voltage fuse, the varistor RV is grounded, the high-voltage fuse is electrically connected with a three-phase five-column voltage transformer TV, the neutral point of the primary side of the three-phase five-column voltage transformer TV is electrically connected with a primary harmonic eliminator, the primary harmonic eliminator is grounded, two coils on the secondary side of the three-phase five-column voltage transformer TV are electrically connected to the 204 terminal of the integrated protector ZB and then grounded, the 204 terminal of the integrated protector ZB is short-circuited with the 206 terminal of the integrated protector ZB; the primary harmonic eliminator can eliminate the ferromagnetic resonance generated by the three-phase five-column voltage transformer during work, protect the three-phase five-column voltage transformer for stable operation, and at the same time can also improve the measurement accuracy of the voltage transformer.

[0032] The two coils on the secondary side of the three-phase five-column voltage transformer TV are also electrically connected to the circuit breaker QF1, which has four output terminals, namely A601 terminal, B601 terminal, C601 terminal and L601 terminal; the A601 terminal is connected in parallel with one end of the fuse FU4 and the input end of the three-phase rectifier bridge ZLQ, the B601 terminal is connected in parallel with one end of the fuse FU5 and the input end of the three-phase rectifier bridge ZLQ, the C601 terminal is connected in parallel with one end of the fuse FU6 and the input end of the three-phase rectifier bridge ZLQ, the L601 terminal is connected to the 205 terminal of the integrated protector ZB through the fuse FU7, and the other end of FU4, the other end of FU5 and the other end of FU6 are connected to the voltage signal end of the integrated protector ZB;

[0033] The output end of the three-phase rectifier bridge ZLQ is connected in series with the circuit breaker QF3 and the normally closed contact of the relay ZJ2, and is connected to the power supply end of the integrated protector ZB and the power module KGDY1. The power module KGDY1 is connected to the monitoring equipment (a camera is used in this embodiment), lighting equipment and display equipment. The power module power supply KGDY1 converts the DC100V power supply into a DC12V power supply to provide power for the camera SXT and the lighting HR1; the display device in this embodiment adopts a large-screen LCD Chinese display screen, including several distribution trolley signal terminals, each of which is also externally connected to a button and then connected to the common terminal. The operator can control the distribution trolley through the menu instructions on the display screen XSP, or through the external button. The distribution trolley signal terminal includes a trolley forward signal terminal and a trolley reverse signal terminal. The display screen XSP is equipped with authorization protection to effectively prevent misoperation. The display screen XSP is connected to the integrated protector ZB through a serial port line, and can display the parameters and videos in the integrated protector ZB. The relevant parameters in the display screen XSP can be modified or viewed through buttons to achieve friendly human-computer interaction. The power supply end of the integrated protector ZB is also connected to the power module KGDY2. The output end of the power module KGDY2 is electrically connected to the isolated safety barrier GL. The power module KGDY2 converts DC110V electricity into DC24V to provide power to the isolated safety barrier GL. The 303 terminal of the integrated protector and the 304 terminal of the integrated protector are connected to the isolated safety barrier GL, and the isolated safety barrier GL is electrically connected to the intrinsically safe circuit.

[0034] The DC power introduced from the incoming line cavity passes through the switch SA2, the circuit breaker QF2, the coil of the relay ZJ2, the normally open contact of the circuit breaker QF2, and is connected to the power module KGDY1 and the power module KGDY2, and then connected to the power supply end of the comprehensive protector ZB; the 306 terminal of the comprehensive protector ZB is electrically connected to the remote closing switch and then connected to the common end, the 307 terminal of the comprehensive protector ZB is electrically connected to the remote opening switch and then connected to the common end, the 308 terminal of the comprehensive protector ZB is electrically connected to the wind power input switch and then connected to the common end, the 309 terminal of the comprehensive protector ZB is electrically connected to the gas input switch and then connected to the common end, the 311 terminal of the comprehensive protector ZB is electrically connected to the trolley entry position switch S9 and then connected to the common end, the 312 terminal of the comprehensive protector ZB is electrically connected to the trolley retreat position switch and then connected to the common end, and the comprehensive protector Terminal 310 of ZB is electrically connected to the trolley entry switch S9 and circuit breaker QF2 and then connected to the common terminal; terminal 314 of integrated protector ZB is electrically connected to the normally open contact of relay ZJ1 and then connected to the common terminal; terminal 404 of integrated protector ZB, terminal 405 of integrated protector ZB, terminal 407 of integrated protector ZB and terminal 408 of integrated protector ZB are electrically connected to the local tripping circuit; terminal 406 of integrated protector ZB is connected to the remote control switch through button SB8; terminal 407 of integrated protector ZB is connected to the local tripping circuit and the coil of relay ZJ1 and then connected to the power supply; terminal A601, terminal B601, terminal C601 and terminal L601 are electrically connected to the normally open switch of relay ZJ1 and then connected to several high open voltage signals;

[0035] Terminal 412 of the integrated protector ZB and terminal 413 of the integrated protector ZB are electrically connected with a distribution cart;

[0036] The integrated protector ZB is provided with spare terminals, which are electrically connected to the high-voltage distribution cabinet to enable one three-phase five-column voltage transformer to control multiple high-voltage distribution cabinets.

[0037] The utility model is provided with RS485 communication, CAN communication, Ethernet communication and optical fiber communication equipment to realize communication with external equipment.

[0038] The model of high voltage fuse is RN2 series.

[0039] The model of the primary detuning device is LXQ series.

[0040] The model of the integrated protector ZB is the ZBT series.

[0041] The working principle of the utility model is:

[0042] Close the circuit breakers QF1, QF2 and QF3, press the SA2 switch button, the coil of relay ZJ2 is energized, the normally open switch of relay ZJ2 is closed, the camera and display equipment are started, press the trolley push-in button SB1, the distribution trolley enters the working position, when the camera detects that the distribution trolley is in place, the switch S9 is closed, the power supply equipment starts working, and the distribution trolley is automatically powered. At this time, the high-voltage three-phase power supply is connected in series with the high-voltage fuse and then converted into a low-voltage AC100V through the three-phase five-column voltage transformer TV. The low voltage converted by the three-phase five-column voltage transformer TV is used to power three circuits. The first circuit is connected to the integrated protector ZB through the small circuit breaker QF1. The utility model provides a voltage signal for the integrated protector ZB; the second route is to convert the low voltage AC100V into DC110V voltage through the three-phase rectifier bridge ZLQ, and then provide working power and measurement voltage signals to the integrated protector ZB, the power module KGDY1 and the power module KGDY2 through the normally closed contacts of the small circuit breaker QF3 and the contactor relay ZJ2; the third route is to provide a three-phase AC100V voltage to the outside through the outlet cavity on the shell through the contactor relay ZJ1. When there is an external power supply contact in the power distribution environment, the external DC110V of the utility model is connected to power the power module KGDY1, the power module KGDY2 and the integrated protector ZB of the utility model, which can save power supply costs.

[0043] The spare terminals of the utility model are connected to different high-voltage distribution cabinets, so that one three-phase five-column voltage transformer can control multiple high-voltage distribution cabinets, which solves the problem that each high-voltage distribution cabinet needs to be equipped with a three-phase five-column voltage transformer, and greatly saves economic costs.

[0044] Regarding the specific structure of the utility model, it should be explained that the connection relationship between the various component modules adopted in the utility model is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring corresponding technical effects and solve the technical problems raised by the utility model without relying on the execution of corresponding software programs. The components, modules, models of specific components and the connection methods between each other appearing in the utility model, as well as the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A flameproof and intrinsically safe high-voltage vacuum power distribution device for mining, characterized in that: It comprises a shell, wherein an inlet cavity is arranged in the shell, a three-phase power supply introduced by the inlet cavity is connected to a varistor RV and a high-voltage fuse, the high-voltage fuse is electrically connected to a three-phase five-column voltage transformer TV, a primary side of the three-phase five-column voltage transformer TV is electrically connected to a primary harmonic eliminator, the primary harmonic eliminator is grounded, a secondary side of the three-phase five-column voltage transformer TV is electrically connected to a 204 terminal of a comprehensive protector ZB and then grounded, and the 204 terminal of the comprehensive protector ZB is short-circuited with a 206 terminal of the comprehensive protector ZB; The secondary side of the three-phase five-column voltage transformer TV is also electrically connected to a circuit breaker QF1, which has four outgoing terminals, namely, terminal A601, terminal B601, terminal C601 and terminal L601; The A601 terminal is connected in parallel with one end of the fuse FU4 and the input end of the three-phase rectifier bridge ZLQ, the B601 terminal is connected in parallel with one end of the fuse FU5 and the input end of the three-phase rectifier bridge ZLQ, the C601 terminal is connected in parallel with one end of the fuse FU6 and the input end of the three-phase rectifier bridge ZLQ, the L601 terminal is connected in series with the fuse FU7 and then electrically connected to the 205 terminal of the integrated protector ZB, and the other end of the FU4, the other end of the FU5 and the other end of the FU6 are connected to the voltage signal end of the integrated protector ZB; The output end of the three-phase rectifier bridge ZLQ is connected in series with the normally closed contact of the circuit breaker QF3 and the relay ZJ2, and is connected to the power supply end of the integrated protector ZB, the power module KGDY1 and the power module KGDY2. The power module KGDY1 is connected to the detection equipment, the lighting equipment and the display equipment. The power module KGDY2 is electrically connected to the isolation safety gate GL; the 303 terminal of the integrated protector and the 304 terminal of the integrated protector are electrically connected to the isolation safety gate GL, and the isolation safety gate GL is electrically connected to the intrinsic safety circuit; The DC power source introduced by the incoming line cavity is connected in series with the switch SA2, the circuit breaker QF2, the coil of the relay ZJ2, the normally open contact of the circuit breaker QF2, and then connected to the power module KGDY1, the power module KGDY2 and the power supply end of the integrated protector ZB; The display device includes a common terminal and a plurality of power distribution cart signal terminals, each of which is electrically connected to a button and then connected to the common terminal; The 311 terminal of the integrated protector ZB is electrically connected to the trolley entry switch S9 and then connected to the common end. The 310 terminal of the integrated protector ZB is electrically connected to the trolley entry switch S9 and the circuit breaker QF2 and then connected to the common end. The 412 terminal of the integrated protector ZB and the 413 terminal of the integrated protector ZB are electrically connected to the distribution trolley. The integrated protector ZB is provided with a spare terminal, and the spare terminal is electrically connected to the high-voltage distribution cabinet.

2. A mine flameproof and intrinsically safe high-voltage vacuum power distribution device according to claim 1, characterized in that: Terminal 314 of the integrated protector ZB is electrically connected to the normally open contact of relay ZJ1 and then connected to the common terminal, and terminals 404, 405, 407 and 408 of the integrated protector ZB are electrically connected to the local opening circuit; The 406 terminal of the integrated protector ZB is connected in series with a button SB8 and then connected to the remote control switch, and the 407 terminal of the integrated protector ZB is connected in parallel to the local opening circuit and the coil of the relay ZJ1; The A601 terminal, the B601 terminal, the C601 terminal and the L601 terminal are electrically connected to the normally open switch of the relay ZJ1 and are connected to a plurality of high open voltage signals.

3. The flameproof and intrinsically safe high-voltage vacuum power distribution device for mining according to claim 1 is characterized in that: The terminal 306 of the integrated protector ZB is electrically connected to the remote closing switch and connected to the common end, the terminal 307 of the integrated protector ZB is electrically connected to the remote opening switch and connected to the common end, the terminal 308 of the integrated protector ZB is electrically connected to the wind power input switch and connected to the common end, the terminal 309 of the integrated protector ZB is electrically connected to the gas input switch and connected to the common end, and the terminal 312 of the integrated protector ZB is electrically connected to the trolley retreat switch and connected to the common end.

4. The flameproof and intrinsically safe high-voltage vacuum power distribution device for mining according to claim 1 is characterized in that: The distribution trolley signal terminal includes the trolley forward signal terminal, the trolley backward signal terminal, the trolley downward signal terminal, the trolley upward signal terminal, the confirmation signal terminal and the reset signal terminal.

5. The flameproof and intrinsically safe high-voltage vacuum power distribution device for mining according to claim 1 is characterized in that: The varistor RV is grounded.

6. The flameproof and intrinsically safe high-voltage vacuum power distribution device for mining according to claim 1 is characterized in that: The model of the high voltage fuse is RN2 series.

7. The flameproof and intrinsically safe high-voltage vacuum power distribution device for mining according to claim 1 is characterized in that: The model of the primary detuning device is LXQ series.

8. The flameproof and intrinsically safe high-voltage vacuum power distribution device for mining according to claim 1 is characterized in that: The model of the comprehensive protector ZB is ZBT series.

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