CN212114788U - Coal mine low-voltage power supply system with remote electric leakage test function - Google Patents
Coal mine low-voltage power supply system with remote electric leakage test function Download PDFInfo
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- CN212114788U CN212114788U CN202021105608.8U CN202021105608U CN212114788U CN 212114788 U CN212114788 U CN 212114788U CN 202021105608 U CN202021105608 U CN 202021105608U CN 212114788 U CN212114788 U CN 212114788U
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Abstract
The utility model discloses a coal mine low-voltage power supply system with a remote electric leakage test function, which comprises a power supply, a power cable, a low-voltage feed switch and an electromagnetic starter; the low-voltage feed switch comprises a microcomputer protection device, a carrier transmitter and a first circuit breaker, wherein the first circuit breaker is connected with the microcomputer protection device, a remote electric leakage test relay is arranged in the microcomputer protection device, and the carrier transmitter is connected with a normally open contact of the remote electric leakage test relay; the electromagnetic starter comprises a shell, a carrier receiver, a resistor and a second circuit breaker, wherein the carrier receiver is connected with a carrier transmitter, a relay is arranged in the carrier receiver, and the resistor is connected with a normally open contact of the relay and a power cable. The advantages are that: the electric shock risk in the artificial electric leakage test process is reduced, the implementation difficulty of the electric leakage test is reduced, and the electric leakage test method has important promotion and practical value for improving the safety level of mine power supply and unattended intelligent development of coal mine power supply.
Description
Technical Field
The utility model relates to a colliery power supply safety protection technical field especially relates to a colliery low pressure power supply system with distant place electric leakage test function.
Background
With the definition of the intelligent development route of the coal mine in China, all large mining industry groups actively respond to the national call and accelerate the intelligent construction of the coal mine, electric power is an important energy source for guaranteeing the production of the coal mine, and unattended management of a coal mine power supply system is the first step of the intelligent development of the coal mine.
At present, according to the requirements of China on safety management regulations under a coal mine, a remote electric leakage test is carried out at the tail end of a power cable of a low-voltage feed switch every month to verify the reliability of the electric leakage protection function, but the test is very difficult to implement and has high danger, the technical level and the working capacity of testers are greatly challenged, the reliability of the electric leakage protection function of the low-voltage feed switch cannot be well verified through the test once every month, the work is still difficult to complete according to the requirements in actual work, great hidden dangers are caused to the underground personnel and power supply safety, and the development of coal mine power supply to unattended management is also hindered.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a colliery low pressure power supply system with distant place electric leakage test function to solve the aforementioned problem that exists among the prior art.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a coal mine low-voltage power supply system with a remote electric leakage test function is connected with a load; the coal mine low-voltage power supply system comprises a power supply, a power cable connected with the power supply, and a low-voltage feed switch and an electromagnetic starter which are sequentially connected in series on the power cable; the low-voltage feed switch comprises a microcomputer protection device, a carrier transmitter and a first circuit breaker, wherein the first circuit breaker is connected with the microcomputer protection device, a remote electric leakage test relay is arranged in the microcomputer protection device, and the carrier transmitter is connected with a normally open contact of the remote electric leakage test relay; electromagnetic starter includes the shell and sets up inside carrier wave receiver, resistance and the second circuit breaker of shell, the carrier wave receiver warp power cable with carrier wave sender links to each other, the inside relay that is provided with of carrier wave receiver, the one end of resistance with the one end of the normally open contact of relay links to each other, the other end of resistance with power cable links to each other, the normally open contact's of relay the other end with the shell links to each other, the second circuit breaker warp power cable connects the load with first circuit breaker.
Preferably, the carrier transmitter is arranged inside the low-voltage feed switch, a signal input end of the carrier transmitter is connected with a normally open contact of the remote leakage test relay and used for receiving a leakage test signal sent by the microcomputer protection device, a first carrier terminal is arranged on the carrier transmitter, and the carrier transmitter is connected with the power cable through the first carrier terminal.
Preferably, the electromagnetic starter further comprises an AC36V winding disposed inside the housing, the AC36V winding being connected to the carrier receiver for supplying power thereto; and the carrier receiver is provided with a second carrier terminal, and is connected with the power cable through the second carrier terminal.
Preferably, the first carrier terminal and the second carrier terminal are both connected to a power cable between the first circuit breaker and the second circuit breaker.
Preferably, one end of the resistor, which is far away from the normally open contact of the relay, is connected to a power cable between the first circuit breaker and the second circuit breaker.
Preferably, the low-voltage feed switch comprises a remote electric leakage test button, and the remote electric leakage test button is connected with the microcomputer protection device; and/or, the low-voltage feed switch comprises a movable remote controller, a remote electric leakage test key is arranged on the remote controller, and the remote electric leakage test key is in wireless connection with the microcomputer protection device.
Preferably, the coal mine low-voltage power supply system further comprises a monitoring computer, an ethernet interface is arranged on the microcomputer protection device, and the monitoring computer is connected with the microcomputer protection device through the ethernet interface.
The utility model has the advantages that: the utility model discloses a test device need not additionally lay the communication cable, can put away the loaded down with trivial details operation of artifical electric leakage test mode, avoids the electric shock risk among the artifical electric leakage test process, reduces the implementation degree of difficulty of electric leakage test, has important promotion effect and very high practical value to improving mine power supply safety level and the unmanned on duty intelligent development of colliery power supply.
Drawings
Fig. 1 is a schematic structural diagram of a testing apparatus in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
As shown in fig. 1, the present embodiment provides a coal mine low-voltage power supply system with a remote leakage test function, where the coal mine low-voltage power supply system is connected to a load; the coal mine low-voltage power supply system comprises a power supply, a power cable connected with the power supply, and a low-voltage feed switch and an electromagnetic starter which are sequentially connected in series on the power cable; the low-voltage feed switch comprises a microcomputer protection device, a carrier transmitter and a first circuit breaker, wherein the first circuit breaker is connected with the microcomputer protection device, a remote electric leakage test relay is arranged in the microcomputer protection device, and the carrier transmitter is connected with a normally open contact of the remote electric leakage test relay; electromagnetic starter includes the shell and sets up inside carrier wave receiver, resistance and the second circuit breaker of shell, the carrier wave receiver warp power cable with carrier wave sender links to each other, the inside relay that is provided with of carrier wave receiver, the one end of resistance with the one end of the normally open contact of relay links to each other, the other end of resistance with power cable links to each other, the normally open contact's of relay the other end with the shell links to each other, the second circuit breaker warp power cable connects the load with first circuit breaker.
In this embodiment, the carrier transmitter is disposed inside the low-voltage feed switch, a signal input end of the carrier transmitter is connected to a normally open contact of the remote leakage test relay, and is configured to receive a leakage test signal sent by the microcomputer protection device, the carrier transmitter is provided with a first carrier terminal, and the carrier transmitter is connected to the power cable through the first carrier terminal.
In this embodiment, the electromagnetic starter further includes an AC36V winding disposed inside the housing, the AC36V winding being connected to the carrier receiver for supplying power thereto; and the carrier receiver is provided with a second carrier terminal, and is connected with the power cable through the second carrier terminal.
In this embodiment, the first carrier terminal and the second carrier terminal are both connected to a power cable between the first circuit breaker and the second circuit breaker.
In this embodiment, the end of the resistor, which is far away from the normally open contact of the relay, is connected to the power cable between the first circuit breaker and the second circuit breaker.
In this embodiment, the low-voltage feed switch includes a remote leakage test button, and the remote leakage test button is connected to the microcomputer protection device; and/or, the low-voltage feed switch comprises a movable remote controller, a remote electric leakage test key is arranged on the remote controller, and the remote electric leakage test key is in wireless connection with the microcomputer protection device.
In this embodiment, the coal mine low voltage further includes a monitoring computer, the microcomputer protection device is provided with an ethernet interface, and the monitoring computer is connected with the microcomputer protection device through the ethernet interface. The monitoring computer can monitor the electrical parameters and working state of the microcomputer protection device and can remotely control the remote leakage test.
In this embodiment, the low-voltage power feed switch and the electromagnetic starter are connected in series to the power cable through a first circuit breaker and a second circuit breaker respectively arranged inside the low-voltage power feed switch and the electromagnetic starter. The first circuit breaker can be switched on or switched off under the control of the microcomputer protection device so as to connect or disconnect the power supply and the low-voltage feed switch. The second circuit breaker can be switched on or off under the control of the electromagnetic starter to connect or disconnect the connection between the power cable and the load. A microcomputer protection device is also arranged in the electromagnetic starter, and the microcomputer protection device can control the on-off of the second circuit breaker.
In this embodiment, the carrier transmitter is installed in the low-voltage feed switch, the working power supply is taken from the power cable connected to the first carrier terminal thereon, and the signal input end of the carrier transmitter is connected to the normally open contact of the remote leakage test relay in the microcomputer protection device in the low-voltage feed switch, and is configured to receive the leakage test signal sent by the microcomputer protection device, and transmit the signal to the power cable in a carrier communication manner through the first carrier terminal.
In this embodiment, the carrier receiver is installed in the electromagnetic starter, the AC36V winding of the control transformer installed in the casing of the electromagnetic starter is used as the working power supply, the carrier signal (leakage test signal) sent by the carrier transmitter on the power cable is received through the second carrier terminal connected with the power cable, one end of the normally open contact of the relay in the carrier receiver is connected with the resistor, and the other end of the normally open contact of the relay is connected with the casing of the electromagnetic starter.
In this embodiment, the power cable is a part of the power supply system, one end of the power cable is connected to the low-voltage feed switch (specifically connected to the carrier transmitter), the other end of the power cable is connected to the electromagnetic starter (specifically connected to the carrier receiver), and both the low-voltage feed switch and the electromagnetic starter belong to switches for breaking a circuit, and transmit electric energy through the power cable therebetween, and also serve as a transmission medium for the carrier signal.
The resistor is a component in the electromagnetic starter and used for simulating the earth leakage fault of the power cable during the leakage test, one end of the resistor is connected with the power cable, and the other end of the resistor is connected with a normally open contact of a relay in the carrier receiver.
In this embodiment, the operator can control the remote leakage test by pressing the remote leakage test button on the low-voltage feed switch or the remote leakage test button on the remote controller of the microcomputer protection device in the low-voltage feed switch. Alternatively, the operator can also remotely control the remote leakage test through the monitoring computer.
The remote electric leakage test process of the test device is as follows: when a remote electric leakage test is carried out, a remote electric leakage test button on the low-voltage feed switch or a remote electric leakage test button on a matched remote controller of a microcomputer protection device in the low-voltage feed switch is pressed through operation, or a monitoring computer is operated, so that the microcomputer protection device is operated to control the remote electric leakage test; after the microcomputer protection device starts the remote electric leakage test, the normally open contact of the remote electric leakage test relay is controlled to be closed. After the normally open contact of the remote leakage test relay is closed, a microcomputer protection device sends a leakage signal through the remote leakage test relay and sends the leakage signal to a carrier transmitter, the carrier transmitter in the low-voltage feed switch receives the leakage signal and then transmits the leakage signal to a power cable in a carrier communication mode, meanwhile, a carrier receiver in an electromagnetic starter arranged on the power cable receives and demodulates the leakage signal to obtain a leakage test signal after demodulation, and directly drives the normally open contact of the relay in the carrier receiver to be conducted, so that a loop of the power cable, a resistor, the normally open contact of the relay and a shell of the electromagnetic starter is conducted, and the resistor is guaranteed to be grounded; the microcomputer protection device in the low-voltage feed switch always monitors the change of the resistance value of the resistor in real time, when the change of the insulation resistance value of the resistor is detected to exceed a set threshold value, the microcomputer protection device can immediately trigger the leakage protection action, a first breaker in the low-voltage feed switch is tripped, the connection between the microcomputer protection device and a power supply is cut off, a remote leakage test is completed, whether the leakage protection function of the power supply system is reliable or not can be verified through the process, and the safety of underground power supply is ensured.
The staff can carry out the remote earth leakage protection test by operating the remote earth leakage test key and the monitoring computer, and the unattended management of underground power supply is realized.
When the power supply system is used, the load needs to be connected to supply power to the load, and an operator can control connection or disconnection between the power supply system and the load by controlling the on-off brake of the second circuit breaker.
Through adopting the utility model discloses an above-mentioned technical scheme has obtained following profitable effect:
the utility model provides a colliery low pressure power supply system with distant place electric leakage test function, this test device need not additionally lay the communication cable, can put the loaded down with trivial details operation of taking off artifical electric leakage test mode, avoids the electric shock risk among the artifical electric leakage test process, reduces the implementation degree of difficulty of electric leakage test, has important promotion and very high practical value to improving mine power supply safety level and the unmanned on duty intelligent development of colliery power supply.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (7)
1. A coal mine low-voltage power supply system with a remote electric leakage test function is connected with a load; the coal mine low-voltage power supply system comprises a power supply, a power cable connected with the power supply, and a low-voltage feed switch and an electromagnetic starter which are sequentially connected in series on the power cable; the method is characterized in that: the low-voltage feed switch comprises a microcomputer protection device, a carrier transmitter and a first circuit breaker, wherein the first circuit breaker is connected with the microcomputer protection device, a remote electric leakage test relay is arranged in the microcomputer protection device, and the carrier transmitter is connected with a normally open contact of the remote electric leakage test relay; electromagnetic starter includes the shell and sets up inside carrier wave receiver, resistance and the second circuit breaker of shell, the carrier wave receiver warp power cable with carrier wave sender links to each other, the inside relay that is provided with of carrier wave receiver, the one end of resistance with the one end of the normally open contact of relay links to each other, the other end of resistance with power cable links to each other, the normally open contact's of relay the other end with the shell links to each other, the second circuit breaker warp power cable connects the load with first circuit breaker.
2. A coal mine low voltage power supply system with remote electric leakage test function as claimed in claim 1, wherein: the carrier transmitter is arranged in the low-voltage feed switch, a signal input end of the carrier transmitter is connected with a normally open contact of the remote electric leakage test relay and used for receiving an electric leakage test signal sent by the microcomputer protection device, a first carrier terminal is arranged on the carrier transmitter, and the carrier transmitter is connected with the power cable through the first carrier terminal.
3. A coal mine low voltage power supply system with remote electric leakage test function as claimed in claim 2, wherein: the electromagnetic starter further comprises an AC36V winding disposed inside the housing, the AC36V winding being connected to the carrier receiver for powering the carrier receiver; and the carrier receiver is provided with a second carrier terminal, and is connected with the power cable through the second carrier terminal.
4. A coal mine low voltage power supply system with remote electric leakage test function as claimed in claim 3, wherein: the first carrier terminal and the second carrier terminal are both connected to a power cable between the first circuit breaker and the second circuit breaker.
5. A coal mine low-voltage power supply system with a remote electric leakage test function according to claim 4, characterized in that: one end of the resistor, which is far away from the normally open contact of the relay, is connected to a power cable between the first circuit breaker and the second circuit breaker.
6. A coal mine low-voltage power supply system with a remote electric leakage test function according to claim 5, characterized in that: the low-voltage feed switch comprises a remote electric leakage test button, and the remote electric leakage test button is connected with the microcomputer protection device; and/or, the low-voltage feed switch comprises a movable remote controller, a remote electric leakage test key is arranged on the remote controller, and the remote electric leakage test key is in wireless connection with the microcomputer protection device.
7. A coal mine low-voltage power supply system with a remote electric leakage test function according to claim 6, characterized in that: the coal mine low-voltage power supply system also comprises a monitoring computer, wherein an Ethernet interface is arranged on the microcomputer protection device, and the monitoring computer is connected with the microcomputer protection device through the Ethernet interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021105608.8U CN212114788U (en) | 2020-06-15 | 2020-06-15 | Coal mine low-voltage power supply system with remote electric leakage test function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021105608.8U CN212114788U (en) | 2020-06-15 | 2020-06-15 | Coal mine low-voltage power supply system with remote electric leakage test function |
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| CN212114788U true CN212114788U (en) | 2020-12-08 |
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| CN202021105608.8U Active CN212114788U (en) | 2020-06-15 | 2020-06-15 | Coal mine low-voltage power supply system with remote electric leakage test function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117825764A (en) * | 2024-03-05 | 2024-04-05 | 山西赛安自动控制有限公司 | Mining low-voltage electric leakage detection device |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117825764A (en) * | 2024-03-05 | 2024-04-05 | 山西赛安自动控制有限公司 | Mining low-voltage electric leakage detection device |
| CN117825764B (en) * | 2024-03-05 | 2024-05-17 | 山西赛安自动控制有限公司 | Mining low-voltage electric leakage detection device |
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| CP03 | Change of name, title or address | ||
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Address after: 100070 1111, floor 11, building 2, courtyard 2, sihezhuang Road, Fengtai District, Beijing Patentee after: Beijing Guoli Electric Technology Co.,Ltd. Address before: 100070 room 402, 4th floor, building 12, District 8, 188 South 4th Ring Road West, Fengtai District, Beijing Patentee before: Beijing Guoli Mining Safety Technology Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Low Voltage Power Supply System for Coal Mines with Remote Leakage Test Function Granted publication date: 20201208 Pledgee: Beijing good faith financing Company limited by guarantee Pledgor: Beijing Guoli Electric Technology Co.,Ltd. Registration number: Y2024990000149 |