Isolation switch detection device

Abstract

The utility model provides an isolating switch detection device, which comprises a power supply module, a motor loop detection unit, a control loop detection unit and a motor running state detection circuit, the motor loop detection unit and the control loop detection unit are arranged in parallel; the motor loop detection unit is connected with the isolating switch operation box to be detected so as to drive a motor loop in the isolating switch operation box to be detected; the control loop detection unit is connected with the to-be-detected isolating switch operation box and is driven by a control loop in the to-be-detected isolating switch operation box; the motor running state detection circuit is connected with the to-be-detected isolating switch operation box and is used for acquiring current information and voltage information of a motor loop in the to-be-detected isolating switch operation box; the power supply module is connected with the motor loop detection unit, the control loop detection unit and the motor operation state detection circuit.

Description

Technical Field

[0001] The utility model belongs to the technical field of disconnector detection, and particularly relates to a disconnector detection device. Background Art

[0002] In the subway industry, a disconnector is an electrical device used to cut off or close a power supply circuit under no-load conditions of the catenary. The disconnector plays an important role in the process of the catenary supplying power to subway trains. Its state directly affects the power supply quality of subway trains. However, the disconnector operation box has many electrical components and circuits. As the use time of the disconnector increases, the risk of electrical component and circuit failures increases.

[0003] In daily maintenance and repair, due to the lack of a special detection device, there are the following difficulties in the detection process: First, when a fault occurs in the electrical components and circuits of the disconnector, it takes a long time to find the fault problem; second, in the maintenance of electrical equipment, the monitoring of its state is relatively vague, such as the state of the motor. Summary of the Utility Model

[0004] In order to overcome the above technical defects, the utility model provides a disconnector detection device, which can quickly locate the fault range of the disconnector and shorten the fault recovery time.

[0005] The utility model is realized through the following scheme:

[0006] A disconnector detection device includes: a power supply module, a motor circuit detection unit, a control circuit detection unit, and a motor operating state detection circuit;

[0007] The motor circuit detection unit and the control circuit detection unit are arranged in parallel;

[0008] The motor circuit detection unit is connected to the disconnector operation box to be detected to drive the motor circuit in the disconnector operation box to be detected;

[0009] The control circuit detection unit is connected to the disconnector operation box to be detected and is driven by the control circuit in the disconnector operation box to be detected;

[0010] The motor operating state detection circuit is connected to the disconnector operation box to be detected and is used to obtain the current information and voltage information of the motor circuit in the disconnector operation box to be detected;

[0011] The power supply module is connected to the motor circuit detection unit, the control circuit detection unit, and the motor operating state detection circuit.

[0012] As a further improvement of the utility model, the power supply module includes: a transformer and a rectifier bridge;

[0013] The high-voltage side of the transformer is connected to the motor operating state detection circuit, and the low-voltage side is connected to the input end of the rectifier bridge. The output end of the rectifier bridge is connected to the motor loop detection unit and the control loop detection unit.

[0014] As a further improvement of the present utility model, it further includes a changeover switch;

[0015] The power supply module is connected to the motor loop detection unit and the control loop detection unit through the changeover switch.

[0016] As a further improvement of the present utility model, the motor loop detection unit includes: a start switch, a first time relay, a start relay, and a contactor;

[0017] The positive pole of the power supply module is sequentially connected to the negative pole of the power supply module through the start switch, the normally closed contact of the first time relay, and the coil of the start relay;

[0018] The positive pole of the power supply module is sequentially connected to the negative pole of the power supply module through the first normally open contact of the start relay and the coil of the first time relay;

[0019] The start switch and the first normally open contact of the start relay are arranged in parallel;

[0020] The positive pole of the power supply module is sequentially connected to the negative pole of the power supply module through the second normally open contact of the start relay and the coil of the contactor;

[0021] Both ends of the coil of the contactor are respectively connected to the isolator operation box to be detected.

[0022] As a further improvement of the present utility model, the control loop detection unit includes: a second time relay and a motor;

[0023] The positive pole of the power supply module is sequentially connected to the negative pole of the power supply module through the normally closed contact of the second time relay, the first normally open contact of the contactor, the motor, and the second normally open contact of the contactor;

[0024] The coil of the second time relay is arranged in parallel with the normally closed contact of the second time relay, the first normally open contact of the contactor, and the motor.

[0025] As a further improvement of the present utility model, the present utility model further includes a box body for placing the power supply module, the motor loop detection unit, the control loop detection unit, and the motor operating state detection circuit.

[0026] As a further improvement of the present utility model, the box body is further provided with a relay detection unit.

[0027] As a further improvement of the present utility model, the relay detection unit includes: a detection base, a toggle switch, a resistance meter, and a plurality of indicator lights;

[0028] The detection base is provided with a DC power supply and a plurality of interfaces;

[0029] The interfaces are used to access the normally open contacts, normally closed contacts or coils of the relay to be tested;

[0030] Each interface is connected in series with an indicator light to form a detection branch, and a plurality of detection branches are arranged in parallel;

[0031] The resistance meter is connected to the detection branch and the interface;

[0032] The DC power supply is connected to the detection branch.

[0033] As a further improvement of the present utility model, the motor operating state detection circuit includes: an oscilloscope and a shunt;

[0034] The high-voltage side of the transformer is connected to the oscilloscope;

[0035] The oscilloscope is connected to the disconnector operating box to be detected;

[0036] The oscilloscope is connected to the disconnector operating box to be detected through the shunt.

[0037] Compared with the prior art, the present utility model has the following beneficial effects: By setting a motor loop detection unit to drive the motor loop of the disconnector operating box to be detected, so as to detect whether there is a fault in the motor loop. By setting a control loop detection unit to simulate the motor loop of the disconnector operating box to be detected, so as to detect whether there is a fault in the control loop in the disconnector operating box to be detected, thereby realizing the rapid positioning of the fault. At the same time, a motor operating state detection circuit is also set to obtain the current information and voltage information of the motor of the disconnector operating box to be detected, so that the state of the motor can be intuitively obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The following further describes in detail the specific embodiments of the present utility model with reference to the accompanying drawings, wherein:

[0039] Figure 1 is a schematic structural diagram of the power supply module, motor loop detection unit, control loop detection unit, and motor operating state detection circuit in the disconnector detection device of the present utility model;

[0040] Figure 2 is a schematic structural diagram of the relay detection unit in the disconnector detection device of the present utility model;

[0041] Figure 3 Schematic diagram of the structure of the box body in the disconnector detection device of the present utility model;

[0042] Figure 4 Schematic diagram of the structure of the disconnector detection device of the present utility model.

[0043] Explanation of reference numerals: 1. Power supply module; 11. Rectifier bridge; 2. Motor loop detection unit; 3. Control loop detection unit; 4. Motor operating state detection circuit; 41. Oscilloscope; 42. Shunt; 5. Box body; 6. Relay detection unit; 61. Detection base; 62. Ohmmeter. Specific embodiments

[0044] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model and are not used to limit the present utility model.

[0045] The present utility model discloses a disconnector detection device, as Figure 1 shown, comprising: a power supply module 1, a motor loop detection unit 2, a control loop detection unit 3, and a motor operating state detection circuit 4; the motor loop detection unit 2 and the control loop detection unit 3 are arranged in parallel; the motor loop detection unit 2 is connected to the disconnector operating box to be detected to drive the motor loop in the disconnector operating box to be detected; the control loop detection unit 3 is connected to the disconnector operating box to be detected and is driven by the control loop in the disconnector operating box to be detected; the motor operating state detection circuit 4 is connected to the disconnector operating box to be detected and is used to obtain the current information and voltage information of the motor loop in the disconnector operating box to be detected; the power supply module 1 is connected to the motor loop detection unit 2, the control loop detection unit 3, and the motor operating state detection circuit 4.

[0046] The power supply module 1 comprises: a transformer and a rectifier bridge 11; the high-voltage side of the transformer is connected to the motor operating state detection circuit 4, the low-voltage side is connected to the input end of the rectifier bridge 11, and the output end of the rectifier bridge 11 is connected to the motor loop detection unit 2 and the control loop detection unit 3.

[0047] For the convenience of testing, the present utility model further comprises a change-over switch; the power supply module 1 is connected to the motor loop detection unit 2 and the control loop detection unit 3 through the change-over switch.

[0048] The motor circuit detection unit 2 includes: a start switch HA, a first time relay SJ1, a start relay HQ, and a contactor KM; the positive pole of the power supply module 1 is sequentially connected to the negative pole of the power supply module 1 through the start switch HA, the normally closed contact of the first time relay SJ1, and the coil of the start relay HQ; the positive pole of the power supply module 1 is sequentially connected to the negative pole of the power supply module 1 through the first normally open contact of the start relay HQ and the coil of the first time relay SJ1; the start switch HA and the first normally open contact of the start relay HQ are arranged in parallel; the positive pole of the power supply module 1 is sequentially connected to the negative pole of the power supply module 1 through the second normally open contact of the start relay HQ and the coil of the contactor KM; both ends of the coil of the contactor KM are respectively connected to the disconnector operation box to be detected.

[0049] The control circuit detection unit 3 includes: a second time relay SJ2 and a motor M; the positive pole of the power supply module 1 is sequentially connected to the negative pole of the power supply module 1 through the normally closed contact of the second time relay SJ2, the first normally open contact of the contactor KM, the motor M, and the second normally open contact of the contactor KM; the coil of the second time relay SJ2 is arranged in parallel with the normally closed contact of the second time relay SJ2, the first normally open contact of the contactor KM, and the motor M.

[0050] As Figure 2 shown, in order to make the whole detection device easy to carry, the present utility model further includes a box body 5 for placing the power supply module 1, the motor circuit detection unit 2, the control circuit detection unit 3, and the motor operation state detection circuit 4.

[0051] Furthermore, a relay detection unit 6 is also arranged on the box body 5.

[0052] As Figure 3 shown, the relay detection unit 6 includes: a detection base 61, a toggle switch, a resistance meter, and several indicator lights; the detection base 61 is provided with a DC power supply and several interfaces; the interfaces are used to access the normally open contacts, normally closed contacts or coils of the relays to be tested; each interface is connected in series with an indicator light to form a detection branch, and several detection branches are arranged in parallel; the resistance meter is connected to the detection branches and the interfaces; the DC power supply is connected to the detection branches.

[0053] The motor operation state detection circuit 4 includes: an oscilloscope 41 and a shunt 42; the high-voltage side of the transformer is connected to the oscilloscope 41; the oscilloscope 41 is connected to the disconnector operation box to be detected; the oscilloscope 41 is connected to the disconnector operation box to be detected through the shunt 42.

[0054] In a specific application, the circuit unit is placed inside the box body 5. Inside the box body 5, an operation panel can be set. The change-over switch, start switch HA, detection base 61, toggle switch, ohmmeter, indicator light, and oscilloscope 41 can all be set on the operation panel for easy operation and observation. On the operation panel, there are interfaces for connecting with the isolating switch operation box to be detected, facilitating rapid testing. For example, by setting the "I+", "I-", "U+", and "U-" interfaces, a rapid connection between the isolating switch operation box to be detected and the motor operation state detection circuit 4 can be achieved. By setting the "KM+", "KM-" interfaces, a rapid connection between the isolating switch operation box to be detected and the motor circuit detection unit 2 can be achieved.

[0055] Next, the present utility model will be further explained in combination with the specific implementation process as follows:

[0056] It should be noted that for the internal circuit of the isolating switch operation box to be detected, please refer to the prior art.

[0057] 1. When it is necessary to detect the motor circuit of the isolating switch operation box to be detected, connect the positive and negative poles of the contactor coil in the isolating switch operation box to be detected to the KM+ and KM- interfaces, and turn the change-over switch to -45°. At this time, the power supply module only supplies power to the motor circuit detection unit 2. Press the start switch HA, and the coil of the start relay HQ is energized. The normally open contact of the start relay HQ closes, causing the coil of the first time relay SJ1 and the normally open contact of the first time relay SJ1 that is delayed to open to close. The coil of the contactor KM is energized, and the contactor of the isolating switch to be detected is energized. The KM normally open contact of the motor circuit of the isolating switch to be detected closes, and the motor circuit to be detected is connected to drive the motor of the isolating switch operation box to be detected. After the motor of the isolating switch to be detected runs for 5 s, the normally open contact that is delayed to open of the first time relay disconnects, and the detection ends. Whether the motor circuit of the isolating switch to be detected is normal is judged by the running condition of the motor of the isolating switch to be detected.

[0058] 2. When it is necessary to detect the control circuit detection unit of the isolating switch operation box to be detected, turn the change-over switch to +45°. At this time, the power supply module only supplies power to the control circuit detection unit, and the motor circuit in the isolating switch operation box to be detected is disconnected.

[0059] Switch closing circuit detection process of the disconnector operating box to be detected: Press the switch closing button in the disconnector operating box to be detected. The coil of the closing relay in the disconnector operating box to be detected is energized, and the normally open contact of the closing relay closes, causing the coil of the contactor in the disconnector operating box to be detected and the coil of the contactor KM of the disconnector detection device to be energized (the coil of the contactor KM of the disconnector detection device is energized in parallel through the coil of the contactor in the disconnector operating box to be detected). The normally open contact of the contactor KM of the disconnector detection device closes, causing the coil of the second time relay SJ2 to be energized. The normally open timedelay opening contact of the second time relay SJ2 closes to drive the motor M. After the motor M of the disconnector detection device runs for 5 s, the normally open timedelay opening contact of the second time relay SJ2 opens, and the motor M stops rotating. The detection ends. Judge whether the switch closing circuit in the disconnector operating box to be detected is normal by checking the operation of the motor M of the disconnector detection device;

[0060] Disconnector opening circuit detection process of the disconnector operating box to be detected: Press the switch closing button in the disconnector operating box to be detected. The coil of the closing relay in the disconnector operating box to be detected is energized, and the normally open contact of the starting closing relay closes, causing the coil of the contactor in the disconnector operating box to be detected and the coil of the contactor KM of the disconnector detection device to be energized. The normally open contact of the contactor KM of the disconnector detection device closes, causing the coil of the second time relay SJ2 of the disconnector detection device to be energized. The normally open timedelay opening contact of the second time relay SJ2 closes to drive the motor M of the disconnector detection device. After the motor M of the disconnector detection device runs for 5 s, the normally open timedelay opening contact of the second time relay SJ2 of the disconnector detection device opens, and the motor M of the disconnector detection device stops rotating. The detection ends. Judge whether the disconnector opening circuit of the disconnector operating box to be detected is normal by checking the operation of the motor M of the disconnector detection device;

[0061] It should be noted that for the opening and closing circuit detection of the disconnector operating box to be detected, the disconnector knife switch needs to be switched to the corresponding state, that is, when detecting the closing circuit, the knife switch needs to be in the open position; when detecting the opening circuit, the knife switch needs to be in the closed position.

[0062] 3. When it is necessary to detect the motor circuit and the control circuit detection unit of the disconnector operating box to be detected simultaneously, connect the positive and negative poles of the contactor coil in the disconnector operating box to be detected to the KM+ interface and the KM- interface. Turn the changeover switch to 0°. At this time, the power supply module supplies power to the motor circuit detection unit and the control circuit detection unit simultaneously. Press the start switch HA, and the coil of the start relay HQ is energized. The normally open contact of the start relay HQ closes, causing the coil of the first time relay and the normally open contact of the first time relay that is delayed to open to close. The coil of the contactor KM is energized, and the contactor of the disconnector to be detected is energized. The normally open contact KM of the motor circuit of the disconnector to be detected closes, and the motor circuit to be detected and the motor circuit of the detection box are connected to drive the motor of the disconnector operating box to be detected and the motor of the detection box. After the motor of the disconnector to be detected and the motor of the detection box run for 5 s, the normally open contact that is delayed to open of the first time relay disconnects, and the detection ends. Determine whether the motor circuit of the disconnector to be detected is normal based on the operation of the motor of the disconnector to be detected.

[0063] Detection process of the switch closing circuit of the disconnector operating box to be detected: Press the switch closing button in the disconnector operating box to be detected. The coil of the closing relay in the disconnector operating box to be detected is energized, and the normally open contact of the closing relay closes, causing the coil of the contactor in the disconnector operating box to be detected and the coil of the contactor KM of the disconnector detection device to be energized (the coil of the contactor KM of the disconnector detection device is energized in parallel through the coil of the contactor in the disconnector operating box to be detected). The normally open contact KM of the contactor of the disconnector detection device closes, causing the coil of the second time relay SJ2 to be energized. The normally open contact that is delayed to open of the second time relay SJ2 closes, driving the motors M of the disconnector detection device and the motor of the disconnector operating box to be detected to act. After the motor of the disconnector detection device runs for 5 s, the normally open contact that is delayed to open of the second time relay SJ2 of the disconnector detection device disconnects, and the detection ends. Determine whether the switch closing circuit of the disconnector operating box to be detected is normal based on the operation of the motor M of the disconnector detection device;

[0064] Isolation switch opening circuit detection process for the isolation switch operating box to be detected: Press the switch closing button in the isolation switch operating box to be detected. The coil of the closing relay in the isolation switch operating box to be detected is energized, and the normally open contact of the closing relay is closed, causing the coil of the contactor in the isolation switch operating box to be detected and the contactor KM coil of the isolation switch detection device to be energized. The normally open contact of the contactor KM of the isolation switch detection device is closed, causing the coil of the second time relay SJ2 of the isolation switch detection device to be energized. The normally open contact of the second time relay SJ2 is closed, driving the motors M of both the isolation switch detection device and the isolation switch operating box to be detected to operate. After the motor M of the isolation switch detection device runs for 5 seconds, the normally open contact of the second time relay SJ2 of the isolation switch detection device is opened, and the detection ends. Determine whether the switch opening circuit of the isolation switch operating box to be detected is normal based on the operating condition of the motor M of the isolation switch detection device;

[0065] It should be noted that for the opening and closing circuit detection of the isolation switch operating box to be detected, the isolation switch knife switch needs to be switched to the corresponding state, that is, when detecting the closing circuit, the knife switch needs to be in the open position; when detecting the opening circuit, the knife switch needs to be in the closed position.

[0066] 4. When it is necessary to analyze the motor of the isolation switch operating box to be detected, connect the motor of the isolation switch operating box to be detected to the "I+", "I-", "U+", and "U-" interfaces, and use an oscilloscope to monitor the changes in the current curve and voltage curve of the motor during the operation of the isolation switch, so as to judge the operating state of the motor.

[0067] 5. When performing relay detection, insert the relay into the detection base, and judge the fault condition of the normally closed contact through the indicator light corresponding to the normally closed contact of the relay; turn the toggle switch to the closed position. At this time, the coil of the relay is energized, and the resistance of the relay can be measured with an ohmmeter; judge the fault condition of the normally open contact through the indicator light corresponding to the normally open contact of the relay.

[0068] The above is only a preferred embodiment of the present application, and it is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An isolating switch detection device, characterized in that, Including: A power supply module, a motor circuit detection unit, a control circuit detection unit, and a motor operating state detection circuit; The motor circuit detection unit and the control circuit detection unit are arranged in parallel; The motor circuit detection unit is connected to the disconnector operation box to be detected to drive the motor circuit in the disconnector operation box to be detected; The control circuit detection unit is connected to the disconnector operation box to be detected and is driven by the control circuit in the disconnector operation box to be detected; The motor operating state detection circuit is connected to the disconnector operation box to be detected and is used to obtain the current information and voltage information of the motor circuit in the disconnector operation box to be detected; The power supply module is connected to the motor circuit detection unit, the control circuit detection unit, and the motor operating state detection circuit.

2. The disconnector detection device according to claim 1, wherein, The power supply module includes: a transformer and a rectifier bridge; The high-voltage side of the transformer is connected to the motor operating state detection circuit, the low-voltage side is connected to the input end of the rectifier bridge, and the output end of the rectifier bridge is connected to the motor circuit detection unit and the control circuit detection unit.

3. The disconnector detection device according to claim 1 or 2, characterized in that, It further includes a changeover switch; The power supply module is connected to the motor circuit detection unit and the control circuit detection unit through the changeover switch.

4. The disconnector detection device according to claim 1, characterized in that The motor circuit detection unit includes: a start switch, a first time relay, a start relay, and a contactor; The positive pole of the power supply module is sequentially connected to the negative pole of the power supply module through the start switch, the normally closed contact of the first time relay, and the coil of the start relay; The positive pole of the power supply module is sequentially connected to the negative pole of the power supply module through the first normally open contact of the start relay and the coil of the first time relay; The start switch and the first normally open contact of the start relay are arranged in parallel; The positive pole of the power supply module is sequentially connected to the negative pole of the power supply module through the second normally open contact of the start relay and the coil of the contactor; Both ends of the coil of the contactor are respectively connected to the disconnector operation box to be detected.

5. The disconnector detection device according to claim 2, wherein The control circuit detection unit includes: a second time relay and a motor; The positive pole of the power supply module is sequentially connected to the negative pole of the power supply module through the normally closed contact of the second time relay, the first normally open contact of the contactor, the motor, and the second normally open contact of the contactor; The coil of the second time relay is arranged in parallel with the normally closed contact of the second time relay, the first normally open contact of the contactor, and the motor.

6. The disconnector detection device according to claim 1, wherein It further includes a box body for placing the power supply module, the motor circuit detection unit, the control circuit detection unit, and the motor operating state detection circuit.

7. The disconnector detection device according to claim 6, characterized in that, The box body is further provided with a relay detection unit.

8. The disconnector detection device according to claim 7, wherein, The relay detection unit includes: a detection base, a toggle switch, a resistance meter, and a plurality of indicator lights; The detection base is provided with a DC power supply and a plurality of interfaces; The interfaces are used to access the normally open contacts, normally closed contacts, or coils of the relays to be tested; Each interface is connected in series with an indicator light to form a detection branch, and a plurality of detection branches are arranged in parallel; The resistance meter is connected to the detection branch and the interface; The DC power supply is connected to the detection branch.

9. The disconnector detection device according to claim 2, wherein The motor operating state detection circuit includes: an oscilloscope and a shunt resistor; The high-voltage side of the transformer is connected to the oscilloscope; The oscilloscope is connected to the disconnector operation box to be detected; The oscilloscope is connected to the disconnector operation box to be detected through the shunt resistor.

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