CN112904059A

CN112904059A - 1140V/660V/380V/127V remote leakage test resistance box for underground coal mine

Info

Publication number: CN112904059A
Application number: CN202110443032.9A
Authority: CN
Inventors: 汪堃; 杨磊; 庞士宝; 高路; 张忠良; 李德强; 蒋玉良
Original assignee: Anhui Xiaozhong Intelligent Technology Co ltd
Current assignee: Anhui Xiaozhong Intelligent Technology Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-06-04

Abstract

The invention provides a 1140V/660V/380V/127V long-distance leakage test resistance box for coal mines, and relates to the field. A relay, the power board is electrically connected with the insulation resistance. In the present invention, the resistance box is easy to operate. After installation, one full-time electrician can do the test. The test is more convenient and safer, and the operation time is greatly reduced. One full-time electrician can test multiple places every day, which improves the operation efficiency.

Description

1140V/660V/380V/127V remote leakage test resistance box for underground coal mine

Technical Field

The invention relates to the field of coal mining, in particular to a 1140V/660V/380V/127V remote leakage test resistance box for underground coal mines.

Background

The underground remote electric leakage test of the coal mine adopts the method that a switch is turned on for many years, and a test resistor ll40V is used and a 20k omega/10W resistor is used; the resistance of 11k omega \10W is used for 660V; 380V is provided with a 5k omega \10W resistor; 127V is bridged between any live wire and the ground by a 2k omega \10W resistor, and then power is transmitted to see whether the previous-stage feed switch and the lighting comprehensive protection have leakage tripping protection, so that the leakage test method has great defects:

1. the operation is inconvenient, the switch is inconvenient to be switched on to connect the test resistor, and other faults and short circuits are easily caused to cause unnecessary loss. The requirement on the safety operation of operators is high, and certain danger exists. When in test, if the circuit is not well grounded or the leakage protection fails, the shell of the electrical equipment is electrified, and great potential safety hazard is brought; 2. the upper cavity or the front cavity of the switch needs to be opened in each operation, the cooperation of a tile inspector is needed, the operation procedure is complex, and a plurality of operators are needed during the operation; 3. no obvious isolation point exists for the safety of a human body, and the human body has to directly operate the contact switch shell, so that unsafe factors exist for the human body; 4. at present, many coal mine enterprises replace remote electric leakage tests by using an on-site electric leakage test method, and theoretically, the effects of the on-site tests and the remote electric leakage tests are basically consistent, but the on-site tests can only verify whether the electric leakage protection function is effective, the remote electric leakage tests are tests aiming at the whole of a power supply system, and the on-site tests and the remote electric leakage tests are essentially different.

Disclosure of Invention

The invention aims to provide a 1140V/660V/380V/127V remote leakage test resistance box for underground coal mine, which aims to solve the technical problem.

In order to solve the technical problems, the invention adopts the following technical scheme: the 1140V/660V/380V/127V remote leakage test resistance box for the underground coal mine comprises a flame-proof shell, wherein an upper sealing cover is fixed at the upper end of the flame-proof shell, an input and output interface is fixed at the middle part of the left end and the right end of the upper sealing cover, a lifting handle is fixed on the surface of the middle part of the flame-proof shell, a power-on button is arranged on the left middle side of the upper end of the sealing cover, the flame-proof shell comprises a lifting handle, a control panel, a power panel, a warning unit, an insulation resistor, a measuring voltage assembly and a relay, the power panel is electrically connected with the insulation resistor, the insulation resistor is electrically connected with the measuring voltage assembly, the power panel supplies power to the control panel and the warning unit, and.

Preferably, the number of the input/output interfaces is four, and the four input/output interfaces are electrically connected with a load circuit of the voltage measurement assembly.

Preferably, the power panel converts the voltage input by the relay into V to supply power to the control panel and the warning unit.

Preferably, the configuration that handle, control panel, power strip, warning unit, insulation resistance, measurement voltage assembly and relay are constituteed is used for controlling the return circuit break-make that electric leakage detected and insulation detected.

Preferably, the warning unit comprises a combination of a warning lamp and a buzzer.

Preferably, the voltage measuring assembly integrates 1140V/660V/380/127V four voltage levels, and the power panel automatically controls the insulation resistor to output a corresponding resistance value according to the input voltage.

Preferably, the power-on button is electrically connected with the control panel inside the explosion-proof shell

The invention has the beneficial effects that:

1. in the invention, four voltage levels of 1140V, 660V, 380V and 127V are integrated, and customers can select the voltage levels according to actual conditions.

2. According to the invention, a simulation leakage protection test can be carried out on the remote end of the load side of the feed switch and the lighting integrated protection, and whether the action of the leakage protection device of the underground electrical equipment is reliable or not is checked.

3. According to the invention, the resistor box is convenient to operate, and a test can be carried out by one professional electrician after the resistor box is installed, so that the test is more convenient and safer, the operation time is greatly reduced, and the test can be carried out on a plurality of places by one professional electrician every day, so that the operation efficiency is improved.

4. In the invention, the wiring of the upper cavity of the switch is not required to be opened in the operation process, the wiring or the resistance connection is not required in the whole operation process, the test resistance is integrated in the explosion-proof shell, and only the test button is required to be pressed.

5. In the invention, whether the leakage protection of the upper-stage feed switch is effective or not can be tested.

Drawings

FIG. 1 is a schematic diagram of a front view structure of a 1140V/660V/380V/127V remote leakage test resistance box for a coal mine underground coal mine;

FIG. 2 is a schematic diagram of a system structure of a 1140V/660V/380V/127V remote leakage test resistance box for underground coal mine;

FIG. 3 is a schematic diagram of a top view structure of a 1140V/660V/380V/127V remote leakage test resistance box for a coal mine underground;

reference numerals: 1. an upper sealing cover; 2. an input/output interface; 3. an explosion-proof shell; 4. a handle; 5. a control panel; 6. a power panel; 7. a warning unit; 8. an insulation resistance; 9. measuring a voltage assembly; 10. a relay; 11. a power-on button.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is further described below with reference to the specific embodiments and the attached drawings, but the following embodiments are only the preferred embodiments of the invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.

Specific embodiments of the present invention are described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1-3, the 1140V/660V/380V/127V remote leakage test resistance box for the underground coal mine comprises a flameproof housing 3, an upper sealing cover 1 is fixed at the upper end of the flameproof housing 3, an input/output interface 2 is fixed at the middle part of the left end and the right end of the upper sealing cover 1, a handle 4 is fixed on the surface of the middle part of the flameproof housing 3, a power button 11 is arranged at the left middle side of the upper end of the sealing cover 1, the flameproof housing 3 internally comprises a handle 4, a control panel 5, a power panel 6, a warning unit 7, an insulation resistor 8, a voltage measurement assembly 9 and a relay 10, the power panel 6 is electrically connected with the insulation resistor 8, the insulation resistor 8 is electrically connected with the voltage measurement assembly 9, the power panel 6 supplies power to the control panel 5 and the warning unit 7, and the.

When the device is used, the flameproof housing 3 is electrically connected with a load circuit of a measuring voltage assembly 9 through four input and output interfaces, the voltage is converted into 28V power supply through the circuit board, the electrifying button 11 is pressed, the power panel 6 starts to supply power to the control panel 5, the relay 10 is controlled to be attracted under the combined action of the control panel 5 and the electrifying button, so that 20k omega \10W, 11k omega \10W, 5k omega \10W and 2k omega \10W insulation resistors 8 and 1140V, 660V, 380V and 127V are electrically conducted to the ground, then power is transmitted to see whether the primary feed switch and the lighting integrated protection trip protection on the measuring voltage assembly 9, the detection is carried out in the mode, personnel do not need to directly operate the contact switch housing during detection, the risk is reduced, the problem that a remote electric leakage test needs to be carried out by one switch when the electric leakage test is carried out remotely is solved, therefore, the leakage state of the switch can be clearly seen by workers, the operation is simple and convenient, the burden of maintenance workers is reduced, and convenience is provided for the workers on duty.

Example 2

During the use, 3 internally mounted of flame proof shell have warning unit 7, supply power through power strip 6, when taking place the electric leakage, warning unit 7 can send audible and visual alarm through warning light and bee calling organ, can in time remind personnel to overhaul.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The 1140V/660V/380V/127V long-distance leakage test resistance box used in coal mines comprises an explosion-proof casing (3), characterized in that: the upper end of the explosion-proof casing (3) is fixed with an upper cover (1), Input and output interfaces (2) are fixed in the middle of the left and right ends of the upper cover (1), a handle (4) is fixed on the middle surface of the flameproof casing (3), and the upper end of the cover (1) is left on the left side. A power-on button (11) is arranged on the middle side, and the flameproof casing (3) includes a handle (4), a control board (5), a power board (6), a warning unit (7), an insulation resistance (8), A measuring voltage assembly (9) and a relay (10), the power supply board (6) is electrically connected to the insulation resistance (8), and the insulation resistance (8) is electrically connected to the measuring voltage assembly (9), the said The power supply board (6) supplies power to the control board (5) and the warning unit (7), and the handle (4) is electrically connected with the relay (10).

2. The 1140V/660V/380V/127V long-distance leakage test resistance box for underground coal mines according to claim 1, is characterized in that: the input and output interfaces (2) are provided with four, and the four described input and output interfaces (2) It is electrically connected to the load circuit of the measuring voltage assembly (9).

3. The 1140V/660V/380V/127V long-distance leakage test resistance box for underground coal mines according to claim 1, is characterized in that: the power board (6) converts the voltage input by the relay (10) into 28V to control the The board (5) and the warning unit (7) are powered.

4. The 1140V/660V/380V/127V long-distance leakage test resistance box for underground coal mines according to claim 1, is characterized in that: the handle (4), the control board (5), the power supply board (6), The configuration composed of the warning unit (7), the insulation resistance (8), the measuring voltage assembly (9) and the relay (10) is used to control the circuit on-off of the leakage detection and the insulation detection.

5. The 1140V/660V/380V/127V long-distance leakage test resistance box for underground coal mines according to claim 1, wherein the warning unit (7) comprises a warning light and a buzzer combination.

6. The 1140V/660V/380V/127V long-distance leakage test resistance box for underground coal mines according to claim 1, wherein the measuring voltage assembly (9) integrates four voltages of 1140V/660V/380/127V The power board (6) automatically controls the insulation resistance (8) to output the corresponding resistance value according to the input voltage.

7. The 1140V/660V/380V/127V long-distance leakage test resistance box for underground coal mines according to claim 1, characterized in that: the power-on button (11) and the internal control panel (5) of the flameproof casing (3) Electrically connected.