CN114498539A - A remote leakage test system for underground coal mines - Google Patents

Abstract

The invention relates to the technical field of underground leakage detection, in particular to a remote leakage test system in a coal mine, comprising a remote leakage test device, a comprehensive protector, a monitoring computer and a communication network. "Operation, through the action behavior and information collection of the protector and the remote leakage test device, intelligently judge the success or failure of the leakage test, and give report information. If the leakage test is successful, reset the low-voltage protector, re-close the switch, and restore the power supply; if the leakage test fails, a failure information prompt will be given, an alarm will be given, and the operation and maintenance personnel will be instructed to adjust the leakage protection setting of the protector.

Description

A remote leakage test system for underground coal mines

technical field

The invention relates to the technical field of underground leakage detection, in particular to a remote underground leakage test system in a coal mine.

Background technique

With the construction of intelligent mines in my country, the level of intelligentization of coal mines has been continuously improved. The safety of underground power supply in coal mines is very important in the production process, which always affects the output of coal mining and the life safety of producers. Coal mine workplaces are generally humid and the construction conditions are poor. Although various measures are adopted, underground leakage is still inevitable. Therefore, the protector is required to operate reliably after a leakage accident occurs in the underground. verify.

The traditional cable remote leakage test method is to turn off the power supply switch, open the explosion-proof shell of the electromagnetic starter, and use a resistance box to connect one end of the test grounding resistance to a live wire by a wire, and the other end is grounded by a wire. Human operation, such a test method is inconvenient to operate and also causes unsafe factors for operation and maintenance personnel; there is also a leakage test method, which uses the cable carrier communication method to establish communication between the remote leakage test device and the low-voltage protector, one-to-one Wiring, the installation site is fixed, and operation and maintenance personnel are required to perform leakage tests on the spot, which hinders the unattended development of coal mines.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a novel underground remote leakage test system for coal mines, so as to solve the aforementioned problems existing in the prior art.

In order to achieve the above object, the technical scheme adopted in the present invention is: a remote leakage test system in a coal mine, comprising a remote leakage test device, a comprehensive protector, a monitoring computer, and a communication network, wherein:

The remote leakage test device is designed with a variety of communication methods and connected to the monitoring system computer; it is installed on site, the power supply is taken from the inlet cable of the electromagnetic starter, built-in super capacitor, and equipped with leakage grounding resistances of multiple voltage levels. System voltage, automatically select the grounding resistance value, support local and remote remote switching resistance;

The integrated protector, installed inside the low-voltage feed switch, is the protector of the feed switch. When overload, short circuit, leakage, under-voltage and over-voltage faults occur in the power supply circuit, the feed switch can automatically cut off the power supply; and the monitoring system Computer communication, which can realize telemetry, remote signal monitoring and remote control operation;

The monitoring computer installs monitoring configuration software, configures the power supply system, and draws the main wiring diagram; performs remote operation on the remote leakage test device, switches on and off the leakage grounding resistance, receives the leakage protection trip information of the low-voltage protector, and switches the remote leakage test device. Cut the grounding resistance information and action time to judge whether the leakage test succeeds or fails;

The communication network uses wired or wireless communication to realize the connection and information exchange between the remote leakage test device, the comprehensive protector and the monitoring computer.

Preferably, the communication methods that can be used by the remote leakage test device include: wired connection communication network: serial port RS485, Ethernet optical fiber; wireless connection communication network: 4G/5G communication, WIFI.

Preferably, the grounding resistance values are AC1140V\20kΩ, AC660V\11kΩ and AC380V\3.5kΩ.

Preferably, the monitoring computer is installed in the monitoring room above the mine or the production scheduling center, and the comprehensive protector and the remote leakage test device are deployed underground and are connected together through the coal mine industrial ring network.

Preferably, the monitoring configuration software edits a one-key sequence control operation, and the steps are: leakage test of the remote leakage test device → reset of the low-voltage protector → closing of the low-voltage protector.

Preferably, the editing of each step operation condition in the editing one-key sequence control operation by the monitoring configuration software includes interval time, next step execution condition and blocking logic.

Preferably, when the leakage test is successful, the monitoring configuration software resets the operation of the low-voltage protector, recloses the switch, and restores the power supply; when the leakage test fails, it gives a failure information prompt, gives an alarm, and guides the operation and maintenance personnel to adjust the protection. Device leakage protection setting.

Preferably, the communication network shares the coal mine power supply monitoring system network.

The present invention has the following technical effects:

1. The leakage test is easy to operate and reduces wiring;

2. Realize the remote leakage test, so as to be unattended.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only for the present invention. For some examples, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Figure 1 is a schematic diagram of the composition of a remote leakage test system in a coal mine.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to make it easy to understand the technical means, creation features, achieved goals and effects of the present invention, the present invention will be further described below with reference to the specific embodiments.

The remote leakage test system in coal mine is composed of remote leakage test device, comprehensive protector, monitoring computer, and its communication network.

The remote leakage test device is designed with a variety of communication methods, wired connection communication network: serial port RS485, Ethernet fiber; wireless connection communication network: 4G/5G communication, WIFI. It is convenient to use different communication networks to access the monitoring system computer according to the different installation locations.

Remote leakage test device, installed locally, the power supply is taken from the inlet of the electromagnetic starter inlet cable, the low-voltage feed switch is closed, the line has power, the device has power, the line loses power, and the device delays power failure; the device has a built-in super capacitor, When the AC power is lost, the super capacitor supplies power, delays the power failure, and sends the test information to the monitoring system computer. Equipped with leakage grounding resistance of multiple voltage levels, AC1140V\20kΩ, AC660V\11kΩ, AC380V\3.5kΩ, according to the system voltage, the grounding resistance value is automatically selected, and the local and remote remote control switching resistance is supported.

The integrated protector, installed inside the low-voltage feed switch, is the protector of the feed switch. When overload, short circuit, leakage, under-voltage and over-voltage faults occur in the power supply circuit, the feed switch can automatically cut off the power supply. Communication with the monitoring system computer can realize telemetry, remote signal monitoring and remote control operation. With leakage protection function.

The communication network uses wired or wireless communication to realize the connection and information exchange between the remote leakage test device, the comprehensive protector and the monitoring computer, and can share the coal mine power supply monitoring system network. The monitoring computer is installed in the monitoring room above the mine or in the production scheduling center, and the integrated protector and the remote leakage test device are deployed underground and are connected together through the coal mine industrial ring network.

The monitoring computer configures the power supply system, draws the main wiring diagram, performs remote operation on the remote leakage test device, switches on and off the leakage grounding resistance, and realizes the remote leakage test function.

Monitor the computer, install the monitoring configuration software, and edit the one-key sequential control operation sequence steps: leakage test of the remote leakage test device → reset of the low-voltage protector → closing of the low-voltage protector; and blocking logic.

The monitoring computer can judge whether the leakage test succeeds or fails by receiving the leakage protection trip information of the low-voltage protector, the switching grounding resistance information of the remote leakage test device, and the action time.

Criteria for success of leakage test: The monitoring computer receives the leakage protection action trip and report information of the feeder switch protector, sends "protection reset" to the protector, sends "close" to the protector, and the feeder switch is closed, complete Power transmission. The monitoring system forms a comprehensive report of the leakage test, reporting the success of the leakage test.

Criteria for failure of the leakage test: the monitoring computer did not receive the tripping and report of the leakage protection action of the feeder switch protector, and the monitoring system formed a comprehensive report of the leakage test to report the failure of the leakage test. If the leakage test fails, the monitoring computer will give a warning message, prompting the user to adjust the leakage setting of the protector and check the grounding circuit of the device.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (8)

1. A remote leakage test system in a coal mine, comprising a remote leakage test device, a comprehensive protector, a monitoring computer, and a communication network, wherein: The remote leakage test device is designed with a variety of communication methods and connected to the monitoring system computer; it is installed on site, the power supply is taken from the inlet cable of the electromagnetic starter, built-in super capacitor, and equipped with leakage grounding resistances of multiple voltage levels. System voltage, automatically select the grounding resistance value, support local and remote remote switching resistance; The integrated protector, installed inside the low-voltage feed switch, is the protector of the feed switch. When overload, short circuit, leakage, under-voltage and over-voltage faults occur in the power supply circuit, the feed switch can automatically cut off the power supply; and the monitoring system Computer communication, which can realize telemetry, remote signal monitoring and remote control operation; The monitoring computer installs monitoring configuration software, configures the power supply system, and draws the main wiring diagram; performs remote operation on the remote leakage test device, switches on and off the leakage grounding resistance, receives the leakage protection trip information of the low-voltage protector, and switches the remote leakage test device. Cut the grounding resistance information and action time to judge whether the leakage test succeeds or fails; The communication network uses wired or wireless communication to realize the connection and information exchange between the remote leakage test device, the comprehensive protector and the monitoring computer. 2. a kind of underground remote leakage test system of coal mine as claimed in claim 1, is characterized in that, described monitoring configuration software edits one-key sequential control operation, and step is: remote leakage test device leakage test→low-voltage protector reset→ The low voltage protector is closed. 3. a kind of underground remote leakage test system in coal mine as claimed in claim 1 or 2, is characterized in that, in described monitoring configuration software editing one-key sequential control operation, editing each step operating condition comprises interval time, execution next step condition and blocking logic. 4. a kind of underground remote leakage test system of coal mine as claimed in claim 3, is characterized in that, described monitoring configuration software, when leakage test is successful, resets operation to low-voltage protector, recloses, restores power supply; When the test fails, a failure information prompt is given, an alarm is given, and the operation and maintenance personnel are instructed to adjust the leakage protection setting of the protector. 5. a kind of underground remote leakage test system of coal mine as claimed in claim 1 is characterized in that, the communication mode that described remote leakage test device can adopt comprises, wired connection communication network: serial port RS485, Ethernet optical fiber; wireless connection communication Network: 4G/5G communication, WIFI. 6 . The remote leakage test system for underground coal mines according to claim 1 , wherein the resistance values of the leakage grounding resistance are AC1140V\20kΩ, AC660V\11kΩ and AC380V\3.5kΩ. 7 . 7. a kind of underground remote leakage test system of coal mine as claimed in claim 1, is characterized in that, described monitoring computer is installed in above-ground monitoring room or production scheduling center, and comprehensive protector and remote leakage test device are deployed in underground, through coal mine Industrial ring network, connected together. 8 . The remote leakage test system for underground coal mines according to claim 1 , wherein the communication network shares a coal mine power supply monitoring system network. 9 .

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