Mining pilot plug-in

Abstract

The utility model relates to a mining pilot plug-in, and belongs to the field of explosion-proof switch control. The technical problems that the output voltage is unstable and the circuit is not safe when the explosion-proof switch is controlled to start and stop by a mining pilot plug-in are solved. In order to solve the technical problem, the technical scheme adopted is that the mining pilot plug-in comprises a P2 plug-in and a toggle switch, and each port of the P2 plug-in is electrically connected with one terminal of the toggle switch; the toggle switch comprises three output terminals which are respectively a first output terminal, a second output terminal and a third output terminal, a DZ0 voltage-regulator tube and a fuse F2 are arranged between the first output terminal and the photoelectric coupler U3, the photoelectric coupler U3 is connected to the plug-in P1 through a triode V3 and a relay K3, a fuse F1 is arranged between the plug-in P1 and the isolation transformer T1, and the relay K3 is connected to the plug-in P1 through a triode V3 and a relay K3. The input end of the isolation transformer T1 is provided with a bidirectional voltage-regulator tube, and a DZ1 voltage-regulator tube and a fuse F3 are arranged between the second output terminal and the photoelectric coupler U1; the explosion-proof switch is applied to explosion-proof switches.

Description

Technical Field

[0001] The utility model provides a pilot plug-in unit for mining, belonging to the technical field of explosion-proof switch control. Background Art

[0002] With the continuous improvement of the degree of modernization of coal mines, safe, green, intelligent and efficient mining has become the mainstream. At present, most coal mines use remote operation to achieve remote control of equipment. The distance for remote control of electrical equipment underground is long, and it is easy to have short circuits or leakage, which makes it impossible to achieve remote control of equipment. In addition, the output voltage of the existing mine pilot plug-in is unstable when realizing remote control and local control, and it cannot cooperate well with the explosion-proof switch to achieve safe, reliable and stable remote control or local control of equipment. Utility Model Content

[0003] In order to solve the technical problem of realizing safe, reliable and stable remote control or local control of explosion-proof switches by intrinsically safe plug-ins and explosion-proof switches for mines, the utility model proposes a pilot plug-in for mines, the purpose of which is to realize safe and stable control of equipment by improving the circuit structure of the intrinsically safe plug-in.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pilot plug-in for mining, comprising a P2 plug-in and a toggle switch, wherein the P2 plug-in comprises a plurality of ports, the toggle switch comprises a plurality of terminals, each port of the P2 plug-in is electrically connected to a terminal of the toggle switch; the toggle switch comprises three output terminals, namely a first output terminal, a second output terminal and a third output terminal;

[0005] The first output terminal is connected in parallel to the positive electrode of the capacitor C2, the negative electrodes of several first diodes and one end of the resistor R8, the negative electrode of the capacitor C2 is connected in parallel to the positive electrode of the power supply and one end of the resistor R7, the positive electrode of the first diode is connected in parallel to the other end of the resistor R7, the positive electrodes of several DZ0 voltage regulator tubes and the 2nd pin of the photoelectric coupler U3, the other end of the resistor R8 is connected in series with the fuse F2 and then connected to the negative electrode of the DZ0 voltage regulator tube and the 1st pin of the photoelectric coupler U3, the 4th pin of the photoelectric coupler U3 is connected in parallel to one end of the resistor R3 and one end of the resistor R6 , the other end of the resistor R3 is connected to the power supply, the other end of the resistor R6 is grounded, the 3rd pin of the photocoupler U3 is electrically connected to the base of the transistor V3, the emitter of the transistor V3 is grounded, the collector of the transistor V3 is connected in parallel with one end of the diode D3 and the 1st terminal of the coil of the relay K3, the other end of the diode D3 and the 2nd terminal of the coil of the relay K3 are connected to the power supply, the 3rd terminal of a normally open contact of the relay K3 is electrically connected to the 12th port of the P1 plug-in, and the 4th terminal of a normally open contact of the relay K3 is connected to the 11th port of the P1 plug-in;

[0006] The second output terminal is connected in parallel to the positive electrode of the capacitor C3, the negative electrodes of the plurality of second diodes, and one end of the resistor R10; the negative electrode of the capacitor C3 is connected in parallel to the positive electrode of the power supply and one end of the resistor R9; the positive electrode of the second diode is connected in parallel to the other end of the resistor R9, the positive electrodes of the plurality of DZ1 voltage regulator tubes, and the 2nd pin of the photoelectric coupler U1; the other end of the resistor R8 is connected in series with the fuse F3 and connected to the negative electrode of the DZ1 voltage regulator tube and the 1st pin of the photoelectric coupler U1; the 4th pin of the photoelectric coupler U1 is connected in parallel to one end of the resistor R1 and one end of the resistor R4. end, the other end of the resistor R1 is connected to the power supply, the other end of the resistor R4 is grounded, the 3rd pin of the photocoupler U1 is electrically connected to the base of the transistor V1, the emitter of the transistor V1 is grounded, the collector of the transistor V1 is connected in parallel with one end of the diode D1 and the 1st terminal of the coil of the relay K1, the other end of the diode D1 and the 2nd terminal of the coil of the relay K1 are connected to the power supply, the 3rd terminal of a normally open contact of the relay K1 is electrically connected to the 10th port of the P1 plug-in, and the 4th terminal of a normally open contact of the relay K1 is connected to the 9th port of the P1 plug-in;

[0007] The 15th port of the P1 plug-in is connected to the 1st pin of the bridge rectifier chip U4 and then connected in series with the fuse F1 and the output end of the isolation transformer T1. The 14th port of the P1 plug-in is connected in parallel with the 2nd pin of the bridge rectifier chip U4 and the output end of the isolation transformer T1. The 4th pin of the bridge rectifier chip U4 is grounded. The 3rd pin of the bridge rectifier chip U4 is connected in series with the fuse F11 and then connected in parallel with several voltage regulator diodes and capacitor C1. The positive pole of the capacitor C1 is connected to the power supply. The negative pole is grounded; the input terminal 6 of the isolation transformer T1 is connected in parallel with the positive pole of the Zener diode D4, the positive pole of D24 and the resistor R14, the negative pole of the Zener diode D4 is electrically connected to the negative pole of the Zener diode D5, the negative pole of the Zener diode D24 is electrically connected to the negative pole of the Zener diode D25, the positive pole of the Zener diode D5 and the positive pole of the Zener diode D25 are connected in parallel with the input terminal 7 of the isolation transformer T1 and the positive pole of the power supply; the 13 port of the P1 plug-in is electrically connected to the center tap of the isolation transformer T1.

[0008] Further, port 1 of the P2 plug-in is electrically connected to one end of the remote control stop switch of the explosion-proof switch, port 2 of the P2 plug-in is electrically connected to one end of the local control stop switch of the explosion-proof switch, port 4 of the P2 plug-in is electrically connected to one end of the remote control start switch of the explosion-proof switch, the other end of the remote control stop switch of the explosion-proof switch is connected in parallel with the other end of the remote control start switch of the explosion-proof switch, and then connected to port 7 of the P2 plug-in through a diode D in series; port 5 of the P2 plug-in is electrically connected to one end of the local control start switch of the explosion-proof switch, the other end of the local control stop switch of the explosion-proof switch is connected in parallel with the other end of the local control start switch of the explosion-proof switch, and then connected to port 8 of the P2 plug-in;

[0009] Port 9 of the P1 plug-in is electrically connected to the closing signal terminal of the permanent magnetic switch controller, port 11 of the P1 plug-in is electrically connected to the opening signal terminal of the permanent magnetic switch controller, port 13 of the P1 plug-in is connected to the neutral line, ports 14 and 15 of the P1 plug-in are connected to the three-phase power supply, and the coil of the relay K1 and the button LS are connected in parallel between port 14 of the P1 plug-in and port 15 of the P1 plug-in.

[0010] Furthermore, a diode D15 is connected in series between the 8-port of the P2 plug-in and the terminal electrically connected to the toggle switch.

[0011] Furthermore, the third output terminal of the toggle switch is electrically connected to the negative electrode of the power supply.

[0012] Furthermore, a K01 normally open switch is connected in parallel between the 9th port of the P1 plug-in and the 10th port of the P1 plug-in, and the 10th port of the P1 plug-in is connected in parallel with the K01 normally open switch and then electrically connected to one end of the K02 normally open switch, and the other end of the K02 normally open switch is connected in parallel with the DC end of the permanent magnetic switch controller and the 12th port of the P1 plug-in, and the K02 normally closed switch is connected in parallel between the 12th port of the P1 plug-in and the 11th port of the P1 plug-in and then connected to the opening signal end of the permanent magnetic switch controller. Furthermore, the models of the voltage regulator D4, voltage regulator D5, voltage regulator D24, and voltage regulator D25 are 1N5352B.

[0013] Furthermore, the model of the voltage regulator tube DZ0 and the voltage regulator tube DZ1 is DDZ9678-7.

[0014] Furthermore, the models of the fuse F11 and the fuse F1 are 0451 series.

[0015] Furthermore, the models of the fuse F2 and the fuse F3 are 0154 series.

[0016] Furthermore, the models of the photocoupler U1 and the photocoupler U3 are PC817.

[0017] The beneficial effects of the present invention compared with the prior art are as follows:

[0018] 1. The utility model realizes the generation of pilot plug-in signals and the processing of intrinsically safe signals, so that the sparks generated by the utility model under normal operation, or the sparks generated when an open circuit, grounding or other faults occur, will not ignite the explosive mixture (the short circuit and on-off tests under normal or fault conditions will not ignite the explosive mixture), which complies with the safety regulations of coal mines;

[0019] 2. The utility model has a simple circuit structure, safe operation, stable output voltage, low cost, and is easy to use with an explosion-proof switch to control the start and stop of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] Figure 1 This is a circuit structure diagram of the utility model;

[0022] Figure 2 for Figure 1 Circuit structure diagram of the ib part. DETAILED DESCRIPTION

[0023] like Figure 1-Figure 2 As shown, the utility model provides a pilot plug-in for mining, including a P2 plug-in and a toggle switch, wherein the P2 plug-in includes a plurality of ports, the toggle switch includes a plurality of terminals, and each port of the P2 plug-in is electrically connected to a terminal of the toggle switch; the toggle switch includes three output terminals, namely a first output terminal, a second output terminal and a third output terminal;

[0024] The first output terminal is connected in parallel to the positive electrode of the capacitor C2, the negative electrodes of several first diodes and one end of the resistor R8, the negative electrode of the capacitor C2 is connected in parallel to the positive electrode of the power supply and one end of the resistor R7, the positive electrode of the first diode is connected in parallel to the other end of the resistor R7, the positive electrodes of several DZ0 voltage regulator tubes and the 2nd pin of the photoelectric coupler U3, the other end of the resistor R8 is connected in series with the fuse F2 and then connected to the negative electrode of the DZ0 voltage regulator tube and the 1st pin of the photoelectric coupler U3, the 4th pin of the photoelectric coupler U3 is connected in parallel to one end of the resistor R3 and one end of the resistor R6 , the other end of the resistor R3 is connected to the power supply, the other end of the resistor R6 is grounded, the 3rd pin of the photocoupler U3 is electrically connected to the base of the transistor V3, the emitter of the transistor V3 is grounded, the collector of the transistor V3 is connected in parallel with one end of the diode D3 and the 1st terminal of the coil of the relay K3, the other end of the diode D3 and the 2nd terminal of the coil of the relay K3 are connected to the power supply, the 3rd terminal of a normally open contact of the relay K3 is electrically connected to the 12th port of the P1 plug-in, and the 4th terminal of a normally open contact of the relay K3 is connected to the 11th port of the P1 plug-in;

[0025] The second output terminal is connected in parallel to the positive electrode of the capacitor C3, the negative electrodes of the plurality of second diodes, and one end of the resistor R10; the negative electrode of the capacitor C3 is connected in parallel to the positive electrode of the power supply and one end of the resistor R9; the positive electrode of the second diode is connected in parallel to the other end of the resistor R9, the positive electrodes of the plurality of DZ1 voltage regulator tubes, and the 2nd pin of the photoelectric coupler U1; the other end of the resistor R8 is connected in series with the fuse F3 and connected to the negative electrode of the DZ1 voltage regulator tube and the 1st pin of the photoelectric coupler U1; the 4th pin of the photoelectric coupler U1 is connected in parallel to one end of the resistor R1 and one end of the resistor R4. end, the other end of the resistor R1 is connected to the power supply, the other end of the resistor R4 is grounded, the 3rd pin of the photocoupler U1 is electrically connected to the base of the transistor V1, the emitter of the transistor V1 is grounded, the collector of the transistor V1 is connected in parallel with one end of the diode D1 and the 1st terminal of the coil of the relay K1, the other end of the diode D1 and the 2nd terminal of the coil of the relay K1 are connected to the power supply, the 3rd terminal of a normally open contact of the relay K1 is electrically connected to the 10th port of the P1 plug-in, and the 4th terminal of a normally open contact of the relay K1 is connected to the 9th port of the P1 plug-in;

[0026] The 15th port of the P1 plug-in is connected to the 1st pin of the bridge rectifier chip U4 and then connected in series with the fuse F1 and the output end of the isolation transformer T1. The 14th port of the P1 plug-in is connected in parallel with the 2nd pin of the bridge rectifier chip U4 and the output end of the isolation transformer T1. The 4th pin of the bridge rectifier chip U4 is grounded. The 3rd pin of the bridge rectifier chip U4 is connected in series with the fuse F11 and then connected in parallel with several voltage regulator diodes and capacitor C1. The positive pole of the capacitor C1 is connected to the power supply. The negative pole is grounded; the input terminal 6 of the isolation transformer T1 is connected in parallel with the positive pole of the Zener diode D4, the positive pole of D24 and the resistor R14, the negative pole of the Zener diode D4 is electrically connected to the negative pole of the Zener diode D5, the negative pole of the Zener diode D24 is electrically connected to the negative pole of the Zener diode D25, the positive pole of the Zener diode D5 and the positive pole of the Zener diode D25 are connected in parallel with the input terminal 7 of the isolation transformer T1 and the positive pole of the power supply; the 13 port of the P1 plug-in is electrically connected to the center tap of the isolation transformer T1.

[0027] A K01 normally open switch is also connected in parallel between port 9 of the P1 plug-in and port 10 of the P1 plug-in. Port 10 of the P1 plug-in is connected in parallel to the K01 normally open switch and then electrically connected to one end of the K02 normally open switch. The other end of the K02 normally open switch is connected in parallel to the DC end of the permanent magnet switch controller and port 12 of the P1 plug-in. A K02 normally closed switch is connected in parallel between port 12 of the P1 plug-in and port 11 of the P1 plug-in and then connected to the opening signal end of the permanent magnet switch controller. Port 13 of the P1 plug-in is connected to the neutral line. Ports 14 and 15 of the P1 plug-in are connected to a three-phase power supply. The coil of the relay K1 and the button LS are connected in parallel between port 14 of the P1 plug-in and port 15 of the P1 plug-in.

[0028] A diode D15 is connected in series between the 8-port of the P2 plug-in and the terminal electrically connected to the toggle switch.

[0029] The third output terminal of the toggle switch is electrically connected to the negative electrode of the power supply.

[0030] Port 1 of the P2 plug-in is electrically connected to one end of the remote control stop switch of the explosion-proof switch, port 2 of the P2 plug-in is electrically connected to one end of the local control stop switch of the explosion-proof switch, port 4 of the P2 plug-in is electrically connected to one end of the remote control start switch of the explosion-proof switch, the other end of the remote control stop switch of the explosion-proof switch is connected in parallel with the other end of the remote control start switch of the explosion-proof switch, and then connected to port 7 of the P2 plug-in through a diode D in series; port 5 of the P2 plug-in is electrically connected to one end of the local control start switch of the explosion-proof switch, the other end of the local control stop switch of the explosion-proof switch is connected in parallel with the other end of the local control start switch of the explosion-proof switch, and then connected to port 8 of the P2 plug-in;

[0031] The model of Zener diodes D4, D5, D24 and D25 is 1N5352B, the model of Zener diodes DZ0 and DZ1 is DDZ9678-7, the model of fuses F11 and F1 are 0451 series, the model of fuses F2 and F3 are 0154 series, the model of bridge rectifier chip U4 is DB107, the model of isolation transformer T1 is PE2409, the model of relay K1 and relay K3 is HF32F, the model of the first diode, the second diode, diode D1, diode D3 and diode D15 are 1N4007, the model of toggle switch is MTS-302, the model of photocouplers U1 and U3 are PC817, and the model of transistors V1 and V3 are 2N5551.

[0032] The utility model can start and stop the explosion-proof switch by connecting the 9th port, the 10th port, the 11th port and the 12th port of the P1 plug-in to the control circuit of the explosion-proof switch. The circuit structure of the utility model can protect the circuit and output a stable voltage.

[0033] The working principle of the utility model is:

[0034] After the utility model is installed in the explosion-proof switch, when the toggle switch is turned to the "near control" position, the 2 port of the P2 plug-in and the 8 port of the P2 plug-in are connected, the photoelectric coupler U3 is turned on, the transistor V3 is turned on, the coil of the relay K3 is energized, the normally open contact of the relay K3 is closed, the 11 port of the P1 plug-in and the 12 port of the P1 plug-in are connected, and the explosion-proof switch is controlled to be opened; the 5 port of the P2 plug-in and the 8 port of the P2 plug-in are connected, the photoelectric coupler U1 is turned on, the transistor V1 is turned on, the coil of the relay K1 is energized, the normally open contact of the relay K1 is closed, the 9 port of the P1 plug-in and the 10 port of the P1 plug-in are connected, and the explosion-proof switch is controlled to be closed. When the toggle switch is turned to the "remote control" position, port 1 of the P2 plug-in and port 7 of the P2 plug-in are connected, the photoelectric coupler U3 is turned on, the transistor V3 is turned on, the coil of relay K3 is energized, the normally open contact of relay K3 is closed, port 11 of the P1 plug-in and port 12 of the P1 plug-in are connected, and the explosion-proof switch is controlled to open; port 4 of the P2 plug-in and port 7 of the P2 plug-in are connected, the photoelectric coupler U1 is turned on, the transistor V1 is turned on, the coil of relay K1 is energized, the normally open contact of relay K1 is closed, port 9 of the P1 plug-in and port 10 of the P1 plug-in are connected, and the explosion-proof switch is controlled to close.

[0035] 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.

[0036] 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 pilot plug-in for mining, characterized in that: The device comprises a P2 plug-in and a toggle switch, wherein the P2 plug-in comprises a plurality of ports, the toggle switch comprises a plurality of terminals, and each port of the P2 plug-in is electrically connected to a terminal of the toggle switch; the toggle switch comprises three output terminals, namely a first output terminal, a second output terminal and a third output terminal; The first output terminal is connected in parallel to the positive electrode of the capacitor C2, the negative electrodes of several first diodes and one end of the resistor R8, the negative electrode of the capacitor C2 is connected in parallel to the positive electrode of the power supply and one end of the resistor R7, the positive electrode of the first diode is connected in parallel to the other end of the resistor R7, the positive electrodes of several DZ0 voltage regulator tubes and the 2nd pin of the photoelectric coupler U3, the other end of the resistor R8 is connected in series with the fuse F2 and then connected to the negative electrode of the DZ0 voltage regulator tube and the 1st pin of the photoelectric coupler U3, the 4th pin of the photoelectric coupler U3 is connected in parallel to one end of the resistor R3 and one end of the resistor R6 , the other end of the resistor R3 is connected to the power supply, the other end of the resistor R6 is grounded, the 3rd pin of the photocoupler U3 is electrically connected to the base of the transistor V3, the emitter of the transistor V3 is grounded, the collector of the transistor V3 is connected in parallel with one end of the diode D3 and the 1st terminal of the coil of the relay K3, the other end of the diode D3 and the 2nd terminal of the coil of the relay K3 are connected to the power supply, the 3rd terminal of a normally open contact of the relay K3 is electrically connected to the 12th port of the P1 plug-in, and the 4th terminal of a normally open contact of the relay K3 is connected to the 11th port of the P1 plug-in; The second output terminal is connected in parallel to the positive electrode of the capacitor C3, the negative electrodes of the plurality of second diodes, and one end of the resistor R10; the negative electrode of the capacitor C3 is connected in parallel to the positive electrode of the power supply and one end of the resistor R9; the positive electrode of the second diode is connected in parallel to the other end of the resistor R9, the positive electrodes of the plurality of DZ1 voltage regulator tubes, and the 2nd pin of the photoelectric coupler U1; the other end of the resistor R8 is connected in series with the fuse F3 and connected to the negative electrode of the DZ1 voltage regulator tube and the 1st pin of the photoelectric coupler U1; the 4th pin of the photoelectric coupler U1 is connected in parallel to one end of the resistor R1 and one end of the resistor R4. end, the other end of the resistor R1 is connected to the power supply, the other end of the resistor R4 is grounded, the 3rd pin of the photocoupler U1 is electrically connected to the base of the transistor V1, the emitter of the transistor V1 is grounded, the collector of the transistor V1 is connected in parallel with one end of the diode D1 and the 1st terminal of the coil of the relay K1, the other end of the diode D1 and the 2nd terminal of the coil of the relay K1 are connected to the power supply, the 3rd terminal of a normally open contact of the relay K1 is electrically connected to the 10th port of the P1 plug-in, and the 4th terminal of a normally open contact of the relay K1 is connected to the 9th port of the P1 plug-in; The 15th port of the P1 plug-in is connected to the 1st pin of the bridge rectifier chip U4 and then connected in series with the fuse F1 and the output end of the isolation transformer T1. The 14th port of the P1 plug-in is connected in parallel with the 2nd pin of the bridge rectifier chip U4 and the output end of the isolation transformer T1. The 4th pin of the bridge rectifier chip U4 is grounded. The 3rd pin of the bridge rectifier chip U4 is connected in series with the fuse F11 and then connected in parallel with several voltage regulator diodes and capacitor C1. The positive pole of the capacitor C1 is connected to the power supply. The negative pole is grounded; the input terminal 6 of the isolation transformer T1 is connected in parallel with the positive pole of the Zener diode D4, the positive pole of D24 and the resistor R14, the negative pole of the Zener diode D4 is electrically connected to the negative pole of the Zener diode D5, the negative pole of the Zener diode D24 is electrically connected to the negative pole of the Zener diode D25, the positive pole of the Zener diode D5 and the positive pole of the Zener diode D25 are connected in parallel with the input terminal 7 of the isolation transformer T1 and the positive pole of the power supply; the 13 port of the P1 plug-in is electrically connected to the center tap of the isolation transformer T1.

2. A pilot plug-in for mining according to claim 1, characterized in that: Port 1 of the P2 plug-in is electrically connected to one end of the remote control stop switch of the explosion-proof switch, port 2 of the P2 plug-in is electrically connected to one end of the local control stop switch of the explosion-proof switch, port 4 of the P2 plug-in is electrically connected to one end of the remote control start switch of the explosion-proof switch, the other end of the remote control stop switch of the explosion-proof switch is connected in parallel with the other end of the remote control start switch of the explosion-proof switch, and then connected to port 7 of the P2 plug-in through a diode D in series; port 5 of the P2 plug-in is electrically connected to one end of the local control start switch of the explosion-proof switch, the other end of the local control stop switch of the explosion-proof switch is connected in parallel with the other end of the local control start switch of the explosion-proof switch, and then connected to port 8 of the P2 plug-in; Port 9 of the P1 plug-in is electrically connected to the closing signal terminal of the permanent magnetic switch controller, port 11 of the P1 plug-in is electrically connected to the opening signal terminal of the permanent magnetic switch controller, port 13 of the P1 plug-in is connected to the neutral line, ports 14 and 15 of the P1 plug-in are connected to the three-phase power supply, and the coil of the relay K1 and the button LS are connected in parallel between port 14 of the P1 plug-in and port 15 of the P1 plug-in.

3. A pilot plug-in for mining according to claim 1, characterized in that: A diode D15 is connected in series between the 8-port of the P2 plug-in and the terminal electrically connected to the toggle switch.

4. A pilot plug-in for mining according to claim 1, characterized in that: The third output terminal of the toggle switch is electrically connected to the negative electrode of the power supply.

5. A pilot plug-in for mining according to claim 1, characterized in that: A K01 normally open switch is also connected in parallel between port 9 of the P1 plug-in and port 10 of the P1 plug-in. Port 10 of the P1 plug-in is connected in parallel to the K01 normally open switch and then electrically connected to one end of the K02 normally open switch. The other end of the K02 normally open switch is connected in parallel to the DC end of the permanent magnet switch controller and port 12 of the P1 plug-in. Port 12 of the P1 plug-in and port 11 of the P1 plug-in are connected in parallel to the K02 normally closed switch and then connected to the opening signal end of the permanent magnet switch controller of the permanent magnet switch controller.

6. A pilot plug-in for mining according to claim 1, characterized in that: The model of the voltage regulator tube D4, voltage regulator tube D5, voltage regulator tube D24 and voltage regulator tube D25 is 1N5352B.

7. A pilot plug-in for mining according to claim 1, characterized in that: The models of the voltage regulator tube DZ0 and the voltage regulator tube DZ1 are DDZ9678-7.

8. A pilot plug-in for mining according to claim 1, characterized in that: The models of the fuse F11 and the fuse F1 are 0451 series.

9. A pilot plug-in for mining according to claim 1, characterized in that: The models of the fuse F2 and the fuse F3 are 0154 series.

10. A pilot plug-in for mining according to claim 1, characterized in that: The photocoupler U1 and the photocoupler U3 are of the type PC817.

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