Warning and power-off device for false power transmission of coal mining machine

Abstract

The utility model provides an alarm power-off device for false power transmission of a coal mining machine, which belongs to the field of coal mine fully mechanized mining machinery and comprises a combination switch, a transformer T, a relay ZJ, an electric leakage detection module, a voice alarm and a resistor R. The power input end of the combination switch is connected with a mobile substation. An electric leakage detection input end RO of the combination switch is connected with an electric leakage detection module in series and then connected with one end of a coal mining machine standby button BYA1, the other end of the coal mining machine standby button BYA1 is connected with a resistor R in series and then grounded, an output end of a mobile substation is connected to an input end of a transformer T, and a first output end of the transformer T is connected with the coal mining machine standby button BYA1 and a coil of a relay ZJ in series. A second output end of the transformer T is connected in series with a normally closed contact D1 of a control relay D, a normally open contact ZJ1 of a relay ZJ and a voice alarm in the mobile substation; and electric shock caused by mistaken power transmission of the coal mining machine to maintainers is avoided.

Description

Technical Field

[0001] This utility model relates to the field of electromechanical technology in coal mine fully mechanized mining, and in particular to an alarm and power-off device for accidental power supply to a coal mining machine. Background Technology

[0002] In the daily maintenance and repair work at coal mining faces, the routine power supply to and from the coal mining machine is still simply performed by turning on the isolating handle of the combination switch. However, maintenance personnel at the coal mining face often have both mechanics and electricians. Often, the mechanics finish their repairs and immediately call for power to be restored, while the electricians may still be performing repairs. This can lead to accidental power restoration, resulting in electric shock accidents and threatening the personal safety of maintenance personnel. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to prevent electric shock to maintenance personnel caused by accidental power supply to the coal mining machine.

[0004] This utility model solves the above-mentioned technical problems through the following technical solution: a coal mining machine erroneous power supply alarm and power-off device, the device including a combination switch, a transformer T, a relay ZJ, a leakage current detection module, a voice alarm, and a resistor R. The power input terminal of the combination switch is connected to a mobile substation. The leakage current detection input terminal RO of the combination switch is connected in series with the leakage current detection module and then connected to one end of the coal mining machine's spare button BYA1. The other end of the coal mining machine's spare button BYA1 is connected in series with the resistor R and then grounded. The output terminal of the mobile substation is connected to the input terminal of the transformer T. The first output terminal of the transformer T is connected in series with the coil of the coal mining machine's spare button BYA1 and the relay ZJ. The second output terminal of the transformer T is connected in series with the normally closed contact D1 of the control relay D in the mobile substation, the normally open contact ZJ1 of the relay ZJ, and the voice alarm.

[0005] Preferably, the power input terminal of the combination switch is connected to the low-voltage output terminal of the mobile substation, and the input terminal of the transformer T is connected to the high-voltage output terminal of the mobile substation.

[0006] Preferably, the transformer T is model MS-35W / 127V, the coal mining machine spare button BYA1 and the coil of relay ZJ are connected in series to the 12V voltage output terminal, and the normally closed contact D1 of the control relay D in the mobile substation, the normally open contact ZJ1 of relay ZJ, and the voice alarm are connected in series to the 24V voltage output terminal.

[0007] Preferably, the mobile substation is of model KBSGZY6.0KV / 3.3KV.

[0008] Preferably, the combination switch is model QJZ-600.

[0009] Preferably, the leakage current detection module is model KCLDB-12.

[0010] Preferably, the relay ZJ is model J2X-22F(V)28.

[0011] Preferably, the voice alarm device is model KXB127.

[0012] Preferably, the resistance of the resistor R is 1KΩ.

[0013] The advantages provided by this utility model are:

[0014] This invention connects a leakage current detection module to the leakage current detection input terminal RO of a combination switch. The coal mining machine's spare button BYA1 is connected in series with the leakage current detection module and resistor R, and grounded. When the coal mining machine is being repaired, the combination switch is first disconnected, the coal mining machine stops working, and the spare button BYA1 is pressed simultaneously, keeping the leakage current detection input terminal RO of the combination switch connected to the ground. If energization is accidentally performed, the leakage current detection module sends the detected leakage current signal to the mobile substation at the instant the combination switch is closed. The mobile substation trips, disconnecting the combination switch to prevent electricians from being electrocuted due to accidental energization. At the same time, when the mobile substation trips, the coil of the control relay D inside the mobile substation is de-energized, and the normally closed contact D1 of relay D is closed. The circuit of the voice alarm is activated to sound an alarm, reminding maintenance personnel that someone is working and that energization is strictly prohibited. Attached Figure Description

[0015] Figure 1 The circuit diagram of the coal mining machine erroneous power supply alarm and power-off device provided in the embodiment of this utility model. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model are described clearly and completely below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0017] like Figure 1As shown, this embodiment provides a coal mining machine erroneous power supply alarm and power-off device, including a combination switch 10, a transformer T, a relay ZJ, a leakage current detection module 20, a voice alarm 30, and a resistor R. The power input terminal of the combination switch 10 is connected to the low-voltage output terminal of the mobile substation 40 via a three-phase power line. The leakage current detection input terminal RO of the combination switch 10 is connected in series with the leakage current detection module 20 and then connected to one end of the coal mining machine's backup button BYA1. The other end of the coal mining machine's backup button BYA1 is connected in series with the resistor R and then grounded. The high-voltage output terminal of the mobile substation 40 is connected to the input terminal of the transformer T. The first output terminal of the transformer T is connected in series with the coal mining machine's backup button BYA1 and the coil of the relay ZJ. The second output terminal of the transformer T is connected in series with the normally closed contact D1 of the control relay D in the mobile substation, the normally open contact ZJ1 of the relay ZJ, and the voice alarm 30. The combination switch 10 controls the start and stop of the coal mining machine. During maintenance of the coal mining face, maintenance personnel disconnect the combination switch 10. When the switch is turned to the stop position, the combination switch 10 is de-energized. When the electrician presses the coal mining machine's standby button BYA1 during maintenance, the leakage current detection input terminal RO of the combination switch 10, the leakage current detection module 20, and the resistor R are connected to ground. Since the combination switch 10 is de-energized at this time, it will not display a leakage current. If the mechanic accidentally turns the combination switch 10 back on, the leakage current detection module 20 will send the detected leakage current signal to the mobile substation 40 at the instant the power is turned on. The mobile substation 40 will trip, disconnecting the combination switch 10 to prevent the electrician from being electrocuted due to accidental power restoration. At the same time, when the mobile substation trips, the coil of the control relay D inside the mobile substation is de-energized, and the normally closed contact D1 of the relay D is closed. Since the coal mining machine's standby button BYA1 is already closed, the coil of the relay ZJ is energized, and the normally open contact ZJ1 of the relay ZJ closes. The circuit of the voice alarm 30 is activated to sound an alarm, reminding maintenance personnel that someone is working and that power restoration is strictly prohibited.

[0018] This utility model is used during routine maintenance of underground coal mining machines. By pressing the spare button on the coal mining machine panel, the control combination switch of the coal mining machine is quickly de-energized. This device is quick, safe, and effective, effectively preventing accidental power supply and misoperation, avoiding electric shock accidents and serious safety production accidents, and providing a strong personal safety guarantee for maintenance personnel. A voice alarm reminds on-site personnel to stop the current operation and take immediate effective measures. It also improves the safety of underground coal mining machines during maintenance and avoids damage to equipment and personal injury to maintenance personnel caused by accidental power supply and misoperation. This utility model has been successfully applied in working faces such as 1315(1), 1155(1), and 1511(1), eliminating the problem of accidental power supply during multiple operations, ensuring the safety of workers, and creating nearly 3 million yuan in safety and economic benefits, demonstrating significant economic and social benefits.

[0019] The transformer model is MS-35W / 127V, which is used to convert the input 127V voltage into 12V voltage and 24V voltage respectively. Among them, the spare button BYA1 of the coal mining machine and the coil of relay ZJ are connected in series to the 12V voltage, and the normally closed contact D1 of the control relay D of the mobile substation, the normally open contact ZJ1 of relay ZJ, and the voice alarm are connected in series to the 24V voltage.

[0020] The coal mining machine is model MG650 / 1550-WD, the mobile substation is model KBSGZY6.0KV / 3.3KV, the combination switch is model QJZ-600, the leakage current detection module is model KCLDB-12, the relay ZJ is model J2X-22F(V)28, the voice alarm is model KXB127, and the resistance R is 1KΩ.

[0021] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A coal mining machine erroneous power supply alarm and power-off device, characterized in that: The device includes a combination switch (10), a transformer T, a relay ZJ, a leakage current detection module (20), a voice alarm (30), and a resistor R. The power input terminal of the combination switch (10) is connected to the mobile substation (40). The leakage current detection input terminal RO of the combination switch (10) is connected in series with the leakage current detection module (20) and then connected to one end of the coal mining machine backup button BYA1. The other end of the coal mining machine backup button BYA1 is connected in series with the resistor R and then grounded. The output terminal of the mobile substation (40) is connected to the input terminal of the transformer T. The first output terminal of the transformer T is connected in series with the coil of the coal mining machine backup button BYA1 and the relay ZJ. The second output terminal of the transformer T is connected in series with the normally closed contact D1 of the control relay D in the mobile substation, the normally open contact ZJ1 of the relay ZJ, and the voice alarm (30).

2. The coal mining machine erroneous power supply alarm and power-off device according to claim 1, characterized in that: The power input terminal of the combination switch (10) is connected to the low-voltage output terminal of the mobile substation (40), and the input terminal of the transformer T is connected to the high-voltage output terminal of the mobile substation (40).

3. The coal mining machine erroneous power supply alarm and power-off device according to claim 1, characterized in that: The transformer T is model MS-35W / 127V. The coils of the coal mining machine spare button BYA1 and relay ZJ are connected in series to the 12V voltage output terminal. The normally closed contact D1 of the control relay D in the mobile substation, the normally open contact ZJ1 of the relay ZJ, and the voice alarm (30) are connected in series to the 24V voltage output terminal.

4. The coal mining machine erroneous power supply alarm and power-off device according to claim 1, characterized in that: The mobile substation (40) is model KBSGZY6.0KV / 3.3KV.

5. The coal mining machine erroneous power supply alarm and power-off device according to claim 1, characterized in that: The combination switch (10) is model QJZ-600.

6. The coal mining machine erroneous power supply alarm and power-off device according to claim 1, characterized in that: The leakage current detection module (20) is model KCLDB-12.

7. The coal mining machine erroneous power supply alarm and power-off device according to claim 1, characterized in that: The relay ZJ is model J2X-22F(V)28.

8. The coal mining machine erroneous power supply alarm and power-off device according to claim 1, characterized in that: The voice alarm (30) is model KXB127.

9. The coal mining machine erroneous power supply alarm and power-off device according to claim 1, characterized in that: The resistance R is 1KΩ.

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