Mining low-voltage electric leakage detection device

Abstract

The utility model discloses a mining low-voltage electric leakage detection device, which comprises a main control module, and a sampling module and a display screen which are electrically connected with the main control module, the sampling module is respectively and electrically connected with a battery module and a carrier wave module, and the carrier wave module is respectively and electrically connected with a leakage test loop and a locking loop through a bus. The test resistor provided by the utility model adopts the multi-stage series-parallel combination of onboard medium and small power elements, and the layered layout reduces the occupied area of the original high-power element and reasonably utilizes the limited space area of the main cavity, and meanwhile, the electrical control adopts a two-stage switching-on and switching-off logic control mode. Through reasonable and accurate logic control, the device can be applied to various fields with different voltages, and compared with a field which is only suitable for one voltage, the use range of the device is greatly widened, and the safety in operation is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mine leakage control technical field, concretely relates to a mine low pressure leakage detection device. BACKGROUND

[0002] The cable insulation of the coal mine underground equipment is easily damaged or broken down in the running process under the influence of the damp environment, and the power transmission line is prone to problems such as wire breakage, mechanical damage and line aging due to long-term use, resulting in the leakage phenomenon of the coal mine underground power supply system.

[0003] Due to the presence of various flammable and explosive substances in the coal mine underground environment, if the leakage phenomenon occurs for a long time, an explosion and other accidents will occur, in order to ensure the safety of the coal mine underground, the leakage protection and leakage detection and other fault handling measures are used to eliminate, however, in the process of leakage detection by using the leakage detection device in the prior art, a single device is often only applicable to one voltage field, and after the test is completed, only a large-capacity capacitor is relied on to maintain the display of the test result for a few seconds, which is not conducive to the subsequent operation of the field test. SUMMARY

[0004] The utility model discloses in order to solve the above-mentioned technical problem, proposes the following technical scheme:

[0005] Firstly, the utility model discloses a mine low pressure leakage detection device, which comprises a main control module, a sampling module and a display screen electrically connected with the main control module, the sampling module is electrically connected with a battery module and a carrier wave module respectively, and the carrier wave module is electrically connected with a leakage test loop and a locking loop through a bus.

[0006] In a possible implementation manner, the first 24V+ port and the first 24V- port of the main control module are electrically connected with the power port of the display screen respectively, the XS1 port of the main control module is electrically connected with the input port of the display screen, the AI0 port of the main control module is electrically connected with the DCDY port of the sampling module, the AI1 port of the main control module is electrically connected with the QY port of the sampling module, the X7 port of the main control module is electrically connected with the QJFK port of the sampling module, the X0 port of the main control module is electrically connected with the FWFK port of the sampling module, and the second 24V+ port and the second 24V- port of the main control module are electrically connected with the 24V+ port and the 24V- port of the sampling module respectively.

[0007] In a possible implementation manner, the VC+ port, the VC- port and the BAT- port of the sampling module are electrically connected with the first port to the third port of the battery module respectively, the BAT+ port of the sampling module is electrically connected with the first end of the first disconnecting switch, and the second end of the first disconnecting switch is electrically connected with the fourth port of the battery module.

[0008] In a possible implementation, the 12V port of the carrier module is electrically connected with the 12V port of the sampling module, the A port of the carrier module is electrically connected with the A port of the sampling module, the B port of the carrier module is electrically connected with the B port of the sampling module, the U phase, the V phase and the W phase of the carrier module are electrically connected with the first end of the step-down transformer, and the GND port of the carrier module is electrically connected with the GND port of the sampling module.

[0009] In a possible implementation, the first end of the step-down transformer is electrically connected with the first end of the second disconnector, the second end of the second disconnector is electrically connected with the device under test, and the second end of the step-down transformer is electrically connected with the VI3 port and the VI4 port of the sampling module respectively.

[0010] In a possible implementation, the leakage test circuit includes a 1140V bus, a 660V bus, a 380V bus and a 127V bus, the first end of the 1140V bus, the 660V bus, the 380V bus and the 127V bus is electrically connected with the first end of the pre-leakage test contactor, the second end of the contactor is electrically connected with the W phase of the carrier module, the second end of the 1140V bus is electrically connected with the first end of the first resistor and the first end of the second resistor respectively, the second end of the first resistor is electrically connected with the first end of the third resistor, the second end of the second resistor is electrically connected with the first end of the fourth resistor, the second end of the third resistor and the second end of the fourth resistor are electrically connected with the first end of the first relay, the second end of the 660V bus is electrically connected with the first end of the fifth resistor and the first end of the sixth resistor respectively, the second end of the fifth resistor is electrically connected with the first end of the seventh resistor, the second end of the sixth resistor is electrically connected with the first end of the eighth resistor, the second end of the seventh resistor and the second end of the eighth resistor are electrically connected with the first end of the second relay, the second end of the 380V bus is electrically connected with the first end of the ninth resistor, the second end of the ninth resistor is electrically connected with the first end of the tenth resistor, the second end of the tenth resistor is electrically connected with the first end of the third relay, the second end of the 127V bus is electrically connected with the first end of the eleventh resistor, the second end of the eleventh resistor is electrically connected with the first end of the fourth relay, and the second end of the first relay, the second end of the second relay, the second end of the third relay and the second end of the fourth relay are grounded.

[0011] In a possible implementation, the closed loop comprises a 1140V bus, a 660V bus, a 380V bus and a 127V bus, the first ends of the 1140V bus, the 660V bus, the 380V bus and the 127V bus are electrically connected with the first end of the pre-leakage stage contactor, the second end of the contactor is electrically connected with the W phase of the carrier module, the second end of the 1140V bus is electrically connected with the first end of the twelfth resistor and the first end of the thirteenth resistor respectively, the second end of the twelfth resistor is electrically connected with the first end of the fourteenth resistor, the second end of the thirteenth resistor is electrically connected with the first end of the fifteenth resistor, the second end of the fourteenth resistor and the second end of the fifteenth resistor are electrically connected with the first end of the fifth relay respectively; the second end of the 660V bus is electrically connected with the first end of the sixteenth resistor and the first end of the seventeenth resistor respectively, the second end of the sixteenth resistor is electrically connected with the first end of the eighteenth resistor, the second end of the seventeenth resistor is electrically connected with the first end of the nineteenth resistor, the second end of the eighteenth resistor and the second end of the nineteenth resistor are electrically connected with the first end of the sixth relay respectively; the second end of the 380V bus is electrically connected with the first end of the twentieth resistor, the second end of the twentieth resistor is electrically connected with the first end of the twenty-first resistor, the second end of the twenty-first resistor is electrically connected with the first end of the seventh relay; the second end of the 127V bus is electrically connected with the first end of the twenty-second resistor respectively, the second end of the twenty-second resistor is electrically connected with the first end of the eighth relay, and the second ends of the fifth relay, the sixth relay, the seventh relay and the eighth relay are grounded.

[0012] In a possible implementation, the closed loop comprises a 1140V bus, a 660V bus, a 380V bus and a 127V bus, the first ends of the 1140V bus, the 660V bus, the 380V bus and the 127V bus are electrically connected with the first end of the pre-leakage stage contactor, the second end of the contactor is electrically connected with the W phase of the carrier module, the second end of the 1140V bus is electrically connected with the first end of the twelfth resistor and the first end of the thirteenth resistor respectively, the second end of the twelfth resistor is electrically connected with the first end of the fourteenth resistor, the second end of the thirteenth resistor is electrically connected with the first end of the fifteenth resistor, the second end of the fourteenth resistor and the second end of the fifteenth resistor are electrically connected with the first end of the fifth relay respectively; the second end of the 660V bus is electrically connected with the first end of the sixteenth resistor and the first end of the seventeenth resistor respectively, the second end of the sixteenth resistor is electrically connected with the first end of the eighteenth resistor, the second end of the seventeenth resistor is electrically connected with the first end of the nineteenth resistor, the second end of the eighteenth resistor and the second end of the nineteenth resistor are electrically connected with the first end of the sixth relay respectively; the second end of the 380V bus is electrically connected with the first end of the twentieth resistor, the second end of the twentieth resistor is electrically connected with the first end of the twenty-first resistor, the second end of the twenty-first resistor is electrically connected with the first end of the seventh relay; the second end of the 127V bus is electrically connected with the first end of the twenty-second resistor respectively, the second end of the twenty-second resistor is electrically connected with the first end of the eighth relay, and the second ends of the fifth relay, the sixth relay, the seventh relay and the eighth relay are grounded.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] The test resistor in the utility model adopts multi-stage series-parallel connection of on-board small and medium power elements, and hierarchical layout, which reduces the occupied area of original high-power elements, reasonably utilizes the limited space area of the main cavity, and adopts two-stage input and disconnection logic control mode in electrical control, so that the test equipment can be applied to various voltage sites through reasonable and accurate logic control, and compared with the site suitable for only one voltage, the use range and safety during operation of the device are greatly increased.

[0015] In addition, the utility model adds a group of large-capacity battery pack, which can maintain normal operation of the equipment for a long time even after power-off after test, ensures display and voice reminding of test results of the equipment, and facilitates the operator to control the power supply of the test equipment through remote carrier transmission technology at this time without the need of setting special power supply personnel on site, so that one person can complete the whole test process. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A module schematic view of a mine low-voltage leakage detection device provided by the embodiment of the utility model;

[0017] Figure 2 A circuit structure schematic view of the mine low-voltage leakage detection device provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0018] The present scheme will be described below in combination with the accompanying drawings and specific embodiments.

[0019] Figure 1 A module schematic view of a mine low-voltage leakage detection device provided by the embodiment of the utility model, referring to Figure 1 The mine low-voltage leakage detection device in the embodiment includes a main control module, a sampling module and a display screen electrically connected with the main control module, the sampling module is electrically connected with a battery module and a carrier wave module respectively, and the carrier wave module is electrically connected with a leakage test loop and a locking loop through a bus.

[0020] Referring to Figure 2 The circuit structure schematic view of the mine low-voltage leakage detection device provided by the embodiment of the utility model, in the embodiment, a first 24V+ port and a first 24V- port of the main control module are electrically connected with a power port of the display screen respectively, an XS1 port of the main control module is electrically connected with an input port of the display screen, an AI0 port of the main control module is electrically connected with a DCDY port of the sampling module, an AI1 port of the main control module is electrically connected with a QY port of the sampling module, an X7 port of the main control module is electrically connected with a QJFK port of the sampling module, an X0 port of the main control module is electrically connected with a FWFK port of the sampling module, a second 24V+ port and a second 24V- port of the main control module are electrically connected with a 24V+ port and a 24V- port of the sampling module respectively.

[0021] A VC+ port, a VC- port and a BAT- port of the sampling module are electrically connected with a first port to a third port of the battery module respectively, a BAT+ port of the sampling module is electrically connected with a first end of a first isolating switch, and a second end of the first isolating switch is electrically connected with a fourth port of the battery module.

[0022] The 12V port of the carrier module is electrically connected with the 12V port of the sampling module, the A port of the carrier module is electrically connected with the A port of the sampling module, the B port of the carrier module is electrically connected with the B port of the sampling module, the U phase, the V phase and the W phase of the carrier module are electrically connected with the first end of the step-down transformer, the GND port of the carrier module is electrically connected with the GND port of the sampling module, the first end of the step-down transformer is electrically connected with the first end of the second disconnector, the second end of the second disconnector is electrically connected with the device under test, and the second end of the step-down transformer is respectively electrically connected with the VI3 port and the VI4 port of the sampling module.

[0023] The leakage test circuit comprises a 1140V bus, a 660V bus, a 380V bus and a 127V bus, the first end of the 1140V bus, the 660V bus, the 380V bus and the 127V bus is electrically connected with the first end of the pre-leakage test contactor, the second end of the contactor is electrically connected with the W phase of the carrier module, the second end of the 1140V bus is respectively electrically connected with the first end of the first resistor R1 and the first end of the second resistor R2, the second end of the first resistor R1 is electrically connected with the first end of the third resistor R3, the second end of the second resistor R2 is electrically connected with the first end of the fourth resistor R4, and the second end of the third resistor R3 and the second end of the fourth resistor R4 are electrically connected with the first end of the first relay JD1; the second end of the 660V bus is respectively electrically connected with the first end of the fifth resistor R5 and the first end of the sixth resistor R6, the second end of the fifth resistor R5 is electrically connected with the first end of the seventh resistor R7, the second end of the sixth resistor R6 is electrically connected with the first end of the eighth resistor R8, and the second end of the seventh resistor R7 and the second end of the eighth resistor R8 are electrically connected with the first end of the second relay JD2; the second end of the 380V bus is electrically connected with the first end of the ninth resistor R9, the second end of the ninth resistor R9 is electrically connected with the first end of the tenth resistor R10, and the second end of the tenth resistor R10 is electrically connected with the first end of the third relay JD3; the second end of the 127V bus is respectively electrically connected with the first end of the eleventh resistor R11, the second end of the eleventh resistor R11 is electrically connected with the first end of the fourth relay JD4, and the second end of the first relay JD1, the second end of the second relay JD2, the second end of the third relay JD3 and the second end of the fourth relay JD4 are grounded.

[0024] The closed loop comprises a 1140V bus, a 660V bus, a 380V bus and a 127V bus, first ends of the 1140V bus, the 660V bus, the 380V bus and the 127V bus are electrically connected with first ends of the pre-leakage contactors, second ends of the contactors are electrically connected with a W phase of the carrier module, a second end of the 1140V bus is electrically connected with a first end of a twelfth resistor R12 and a first end of a thirteenth resistor R13 respectively, a second end of the twelfth resistor R12 is electrically connected with a first end of a fourteenth resistor R14, a second end of the thirteenth resistor R13 is electrically connected with a first end of a fifteenth resistor R15, a second end of the fourteenth resistor R14 and a second end of the fifteenth resistor R15 are electrically connected with a first end of a fifth relay JD5; a second end of the 660V bus is electrically connected with a first end of a sixteenth resistor R16 and a first end of a seventeenth resistor R17 respectively, a second end of the sixteenth resistor R16 is electrically connected with a first end of an eighteenth resistor R18, a second end of the seventeenth resistor R17 is electrically connected with a first end of a nineteenth resistor R19, a second end of the eighteenth resistor R18 and a second end of the nineteenth resistor R19 are electrically connected with a first end of a sixth relay JD6; a second end of the 380V bus is electrically connected with a first end of a twentieth resistor R20, a second end of the twentieth resistor R20 is electrically connected with a first end of a twenty-first resistor R21, a second end of the twenty-first resistor R21 is electrically connected with a first end of a seventh relay JD7; a second end of the 127V bus is electrically connected with a first end of a twenty-second resistor R22 respectively, a second end of the twenty-second resistor R22 is electrically connected with a first end of an eighth relay JD8, second ends of the fifth relay JD5, the sixth relay JD6, the seventh relay JD7 and the eighth relay JD8 are grounded.

[0025] The mine low-voltage leakage detection device in the embodiment further comprises a plurality of wired and wireless intrinsic safety and non-intrinsic safety interfaces, which are compatible with different fields and can be freely and conveniently selected, thereby greatly increasing the compatibility of the product.

[0026] In use, the detection device needs to be placed on the side of the device under test and the tripping device, and the power supply needs to be accessed from the wiring cavity of the device under test and the tripping device; during the test, the second isolating switch is closed to the closed position, the step-down transformer is powered to provide power and sampling voltage for the device, the sampling voltage is rectified and filtered by the sampling module and then provided to the main control module, the tester can select to test from the side of the device under test or from the side of the tripping device, the two devices communicate through the carrier module via the power line without the need for additional communication cables, and the test and the reset and closing of the tripping device after the test can be completed from either side; after the device is powered on, the corresponding voltage level and test item can be selected through the man-machine interface, during the test, the device will first attract the corresponding relay in JD1-JD8 according to the selected voltage level, the KM contactor is attracted after a few seconds of delay, the test resistor is put into the tripped device, the device detects the tripped device and displays the test result and gives an audio alarm, and the reset and closing of the tripped device can also be completed remotely through the carrier.

[0027] It should be noted that, in the present document, relational terms such as“first” and“second”, and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms“comprises”,“comprising”, or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without limitation, an element preceded by“comprises a” does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0028] The above description is merely that of specific embodiments of the present application, and variations or replacements can be easily conceived by those skilled in the art within the technical scope disclosed by the present application, and should be encompassed within the scope of the present application. The scope of protection of the present application should be subject to the scope of protection of the claims.

Claims

1. A low-voltage leakage current detection device for mining, characterized in that, include: The main control module, a sampling module and a display screen electrically connected to the main control module, the sampling module being electrically connected to the battery module and the carrier module respectively, and the carrier module being electrically connected to the leakage test circuit and the blocking circuit respectively via a bus.

2. The mining low-voltage leakage current detection device according to claim 1, characterized in that, The first 24V+ port and the first 24V- port of the main control module are electrically connected to the power port of the display screen, the XS1 port of the main control module is electrically connected to the input port of the display screen, the AI0 port of the main control module is electrically connected to the DCDY port of the sampling module, the AI1 port of the main control module is electrically connected to the QY port of the sampling module, the X7 port of the main control module is electrically connected to the QJFK port of the sampling module, the X0 port of the main control module is electrically connected to the FWFK port of the sampling module, and the second 24V+ port and the second 24V- port of the main control module are electrically connected to the 24V+ port and the 24V- port of the sampling module, respectively.

3. The mining low-voltage leakage current detection device according to claim 1, characterized in that, The VC+ port, VC- port, and BAT- port of the sampling module are electrically connected to the first to third ports of the battery module, respectively. The BAT+ port of the sampling module is electrically connected to the first end of the first disconnecting switch, and the second end of the first disconnecting switch is electrically connected to the fourth port of the battery module.

4. The mining low-voltage leakage current detection device according to claim 1, characterized in that, The 12V port of the carrier module is electrically connected to the 12V port of the sampling module. The A port of the carrier module is electrically connected to the A port of the sampling module. The B port of the carrier module is electrically connected to the B port of the sampling module. The U phase, V phase, and W phase of the carrier module are all electrically connected to the first terminal of the step-down transformer. The GND port of the carrier module is electrically connected to the GND port of the sampling module.

5. The mining low-voltage leakage current detection device according to claim 4, characterized in that, include: The first end of the step-down transformer is electrically connected to the first end of the second disconnect switch, the second end of the second disconnect switch is electrically connected to the device under test, and the second end of the step-down transformer is electrically connected to the VI3 and VI4 ports of the sampling module, respectively.

6. The mining low-voltage leakage current detection device according to claim 1, characterized in that, The leakage test circuit includes a 1140V bus, a 660V bus, a 380V bus, and a 127V bus. The first terminals of each of the 1140V, 660V, 380V, and 127V bus are electrically connected to the first terminal of a leakage test pre-stage contactor. The second terminal of the contactor is electrically connected to the W phase of the carrier module. The second terminal of the 1140V bus is electrically connected to the first terminals of a first resistor and a second resistor, respectively. The second terminal of the first resistor is electrically connected to the first terminal of a third resistor, and the second terminal of the second resistor is electrically connected to the first terminal of a fourth resistor. The second terminals of both the third and fourth resistors are electrically connected to the first terminal of a first relay. The second terminal of the 660V bus is electrically connected to the first terminal of a fifth resistor and a sixth resistor, respectively. The first terminal is electrically connected; the second terminal of the fifth resistor is electrically connected to the first terminal of the seventh resistor; the second terminal of the sixth resistor is electrically connected to the first terminal of the eighth resistor; the second terminals of the seventh and eighth resistors are both electrically connected to the first terminal of the second relay; the second terminal of the 380V busbar is electrically connected to the first terminal of the ninth resistor; the second terminal of the ninth resistor is electrically connected to the first terminal of the tenth resistor; the second terminal of the tenth resistor is electrically connected to the first terminal of the third relay; the second terminal of the 127V busbar is electrically connected to the first terminal of the eleventh resistor; the second terminal of the eleventh resistor is electrically connected to the first terminal of the fourth relay; the second terminals of the first, second, third, and fourth relays are grounded.

7. The mining low-voltage leakage current detection device according to claim 6, characterized in that, The interlocking circuit includes a 1140V bus, a 660V bus, a 380V bus, and a 127V bus. The first terminals of the 1140V, 660V, 380V, and 127V bus are all electrically connected to the first terminal of the leakage test pre-contact. The second terminal of the contactor is electrically connected to the W phase of the carrier module. The second terminal of the 1140V bus is electrically connected to the first terminals of the twelfth and thirteenth resistors, respectively. The second terminal of the twelfth resistor is electrically connected to the first terminal of the fourteenth resistor, and the second terminal of the thirteenth resistor is electrically connected to the first terminal of the fifteenth resistor. The second terminals of the fourteenth and fifteenth resistors are both electrically connected to the first terminal of the fifth relay. The second terminal of the 660V bus is electrically connected to the first terminal of the sixteenth and seventeenth resistors, respectively. One end is electrically connected; the second end of the sixteenth resistor is electrically connected to the first end of the eighteenth resistor; the second end of the seventeenth resistor is electrically connected to the first end of the nineteenth resistor; the second ends of the eighteenth and nineteenth resistors are both electrically connected to the first end of the sixth relay; the second end of the 380V busbar is electrically connected to the first end of the twentieth resistor; the second end of the twentieth resistor is electrically connected to the first end of the twenty-first resistor; the second end of the twenty-first resistor is electrically connected to the first end of the seventh relay; the second end of the 127V busbar is electrically connected to the first end of the twenty-second resistor; the second end of the twenty-second resistor is electrically connected to the first end of the eighth relay; the second ends of the fifth, sixth, seventh, and eighth relays are grounded.

8. The mining low-voltage leakage current detection device according to claim 1, characterized in that, It also includes a variety of intrinsically safe and non-intrinsically safe wired and wireless interfaces.

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