Direct-current resistance testing device for medium-voltage vacuum circuit breaker

Abstract

The utility model relates to the technical field of direct-current resistance test auxiliary devices, in particular to a direct-current resistance test device for a medium-voltage vacuum circuit breaker, which comprises a base, a circuit breaker main body, a connecting pipe, a plum blossom contact, a conical auxiliary block, an insulating cylinder, a resistance tester, a lead and a test pen, a plurality of groups of connecting pipes are arranged on the left side of the circuit breaker main body, tulip contacts are arranged at the upper ends of the connecting pipes, a conical auxiliary block is arranged in each tulip contact, an insulating cylinder is fixedly arranged on the left side of each conical auxiliary block, a resistance tester is arranged above the left side of the base, and one end of a test pen is arranged in each conical auxiliary block. In the use process of the DC resistance test auxiliary device, the conical auxiliary block can have more contact surfaces with the contact, and due to the insertion type, the contact pressure is enhanced, the risk of poor contact or line falling in the test process is reduced, and the accuracy of test data is further enhanced.

Description

Technical Field

[0001] This utility model relates to the technical field of DC resistance testing auxiliary devices, and in particular to a DC resistance testing device for a medium-voltage vacuum circuit breaker. Background Technology

[0002] The DC resistance test of the circuit breaker's conductive circuit is a test that reflects the resistance of the conductive rod of the circuit breaker bushing, the resistance at the connection between the conductive rod and the contact, and the contact resistance between the moving and stationary contacts. The circuit resistance value is an important parameter for judging whether the connection of the conductive circuit is good. Due to various factors during the use of the circuit breaker, the contact clamping force of the moving and stationary contacts may decrease, and gaps may appear on the contact surface. This can cause the sprite contacts to overheat under normal operating current when the circuit is closed, or to overheat locally when a fault short-circuit current passes through, resulting in a decrease in the insulation around the contact box, aging of the sprite contacts, and overheating. These factors cause the resistance value of the circuit breaker's conductive circuit to decrease, thus affecting the current carrying capacity under normal operating current and the breaking capacity under short circuit.

[0003] During the preventive test of DC resistance of circuit breakers, in the traditional test process, the measured values ​​are deviated because the voltage and current connection lines are connected to the circuit breaker's sprite contacts with less contact surface and lower contact pressure due to the use of connection clamps.

[0004] Therefore, to address the aforementioned inconveniences in reducing poor contact or line drop during testing, a DC resistance testing device for medium-voltage vacuum circuit breakers can be designed. During use, the tapered auxiliary block is an insertable tapered device, allowing for more contact with the contacts. Furthermore, because it is insertable, the contact pressure is enhanced, reducing the risk of poor contact or line drop during testing, minimizing damage to the perforated contacts, and further improving the accuracy of the test data. Utility Model Content

[0005] To overcome the challenges of using auxiliary devices for DC resistance testing, the preventive test of circuit breaker DC resistance is also a destructive test. During the test, due to the use of connecting clamps with small contact areas and low contact pressure when connecting voltage and current lines to the circuit breaker's sprite contacts, severe local overheating of the contacts can occur, causing the contact springs to heat up and some connecting pieces to melt and smelt. This damages the sprite contacts, reduces the resistance value, and causes deviations in the measured values. Improvements are urgently needed to reduce the problems of poor contact or wires falling off during the test.

[0006] The technical solution of this utility model is as follows: a DC resistance testing device for a medium-voltage vacuum circuit breaker, comprising a base, a circuit breaker body, connecting pipes, a stylus contact, a conical auxiliary block, an insulating cylinder, a resistance tester, wires, and a test pen. The circuit breaker body is arranged on the upper right side of the base, and multiple sets of connecting pipes are arranged on the left side of the circuit breaker body. A stylus contact is arranged at the upper end of the connecting pipe, and a conical auxiliary block is arranged inside the stylus contact. An insulating cylinder is fixedly arranged on the left side of the conical auxiliary block. A resistance tester is arranged on the upper left side of the base, and multiple sets of wires are arranged on the right side of the resistance tester. A test pen is arranged at the right end of the wire, and one end of the test pen is arranged inside the conical auxiliary block.

[0007] Preferably, during the use of the DC resistance testing auxiliary device, firstly, the conical auxiliary block is precisely inserted into the interior of the plum blossom contact to ensure tight contact. Then, multiple sets of test pens are moved synchronously to the right. This smooth movement ensures that the test pens can be accurately aligned and inserted into the conical auxiliary block, thereby forming a stable test circuit with the circuit breaker body. During the test, the resistance tester applies test signals to the conical auxiliary block and plum blossom contact through the wires and test pens, and collects resistance data in real time. After processing, this data is clearly displayed on the screen. During the test, the conical auxiliary block is an insertable conical device, which can have more contact surface with the contact. At the same time, because it is insertable, the contact pressure is enhanced, reducing the risk of poor contact or wire falling off during the test, reducing damage to the plum blossom contact, and further enhancing the accuracy of the test data. The entire test process is efficient and stable, providing strong support for circuit breaker performance evaluation.

[0008] Preferably, a support base is fixedly installed on the upper left side of the base, and a support platform is fixedly installed on the upper part of the support base, with the resistance tester installed inside the support platform.

[0009] Preferably, the resistance tester has multiple sets of buttons, two sets of handwheels, and a screen on its top.

[0010] Preferably, a support frame is fixedly installed on the right side of the support platform, a guide rod is installed inside the support frame, and a guide block is installed on the side wall of the guide rod, with the guide block slidably connected to the guide rod.

[0011] Preferably, a fixed base is fixedly installed on the bottom wall of the support frame, and an adjusting motor is fixedly installed inside the fixed base. An adjusting shaft is installed at the output end of the adjusting motor.

[0012] Preferably, an adjusting gear is fixedly installed at one end of the adjusting shaft, and a guide tooth plate is fixedly installed on the bottom wall of the guide block, with the guide tooth plate meshing with the adjusting gear.

[0013] Preferably, a guide seat is fixedly installed above the guide block, and multiple sets of support frames are fixedly installed above the guide seat, with the test pen fixedly installed inside the support frame.

[0014] The beneficial effects of this utility model are:

[0015] When using the DC resistance testing auxiliary device, firstly, the conical auxiliary block is precisely inserted into the interior of the plum blossom contact to ensure tight contact. Then, activating the translation structure moves multiple sets of test probes synchronously to the right. This smooth movement ensures that the test probes are accurately aligned and inserted into the conical auxiliary block, thus forming a stable test circuit with the circuit breaker body. During the test, the resistance tester applies test signals to the conical auxiliary block and plum blossom contact through the wires and test probes, and collects resistance data in real time. After processing, this data is clearly displayed on the screen. During the test, the conical auxiliary block is an insertable conical device, which allows for more contact surface with the contact. At the same time, because it is insertable, the contact pressure is enhanced, reducing the risk of poor contact or wire falling off during the test, reducing damage to the plum blossom contact, and further enhancing the accuracy of the test data. The entire testing process is efficient and stable, providing strong support for circuit breaker performance evaluation. Attached Figure Description

[0016] Figure 1 The diagram shown is a first three-dimensional structural schematic of a DC resistance testing device for a medium-voltage vacuum circuit breaker according to this utility model.

[0017] Figure 2 The diagram shown is a partial three-dimensional structural schematic of a DC resistance testing device for a medium-voltage vacuum circuit breaker according to this utility model.

[0018] Figure 3 The diagram shown is a partial three-dimensional structural schematic of a DC resistance testing device for a medium-voltage vacuum circuit breaker according to this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the third part of a DC resistance testing device for a medium-voltage vacuum circuit breaker according to this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Base; 2. Circuit breaker body; 3. Connecting pipe; 4. Plum blossom contact; 5. Conical auxiliary block; 6. Insulating cylinder; 7. Resistance tester; 8. Wire; 9. Test pen; 10. Support base; 11. Support platform; 12. Button; 13. Handwheel; 14. Screen; 15. Support frame; 16. Guide block; 17. Guide rod; 18. Fixed seat; 19. Adjusting motor; 20. Adjusting shaft; 21. Adjusting gear; 22. Guide tooth plate; 23. Guide seat; 24. Support frame. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figure 1 and Figure 4 This utility model provides an embodiment: a DC resistance testing device for a medium-voltage vacuum circuit breaker, comprising a base 1, a circuit breaker body 2, connecting pipes 3, a stylus contact 4, a conical auxiliary block 5, an insulating cylinder 6, a resistance tester 7, wires 8, and a test pen 9. The circuit breaker body 2 is arranged on the upper right side of the base 1, and multiple sets of connecting pipes 3 are arranged on the left side of the circuit breaker body 2. The stylus contact 4 is arranged at the upper end of the connecting pipe 3, and the conical auxiliary block 5 is arranged inside the stylus contact 4. The insulating cylinder 6 is fixedly arranged on the left side of the conical auxiliary block 5. The resistance tester 7 is arranged on the upper left side of the base 1, and multiple sets of wires 8 are arranged on the right side of the resistance tester 7. The test pen 9 is arranged at the right end of the wires 8, and one end of the test pen 9 is arranged inside the conical auxiliary block 5.

[0023] Please see Figure 2 and Figure 3 A support base 10 is fixedly installed on the upper left side of the base 1, and a support platform 11 is fixedly installed on the upper part of the support base 10. The resistance tester 7 is installed inside the support platform 11. The resistance tester 7 can be placed through the support base 10 and the support platform 11. Multiple sets of buttons 12 and two sets of handwheels 13 are installed on the upper part of the resistance tester 7. A screen 14 is installed on the upper part of the resistance tester 7. The resistance tester 7 can be adjusted through the multiple sets of buttons 12 and handwheels 13. The test data is processed and clearly displayed on the screen 14. A support frame 15 is fixedly installed on the right side of the support platform 11. A guide rod 17 is installed inside the support frame 15. A guide block 16 is installed on the side wall of the guide rod 17. The guide block 16 is slidably connected to the guide rod 17. The guide block 16 can slide smoothly to the right through the guide rod 17.

[0024] Please see Figure 2 and Figure 3A fixed base 18 is fixedly installed on the bottom wall of the support frame 15. An adjustment motor 19 is fixedly installed inside the fixed base 18. An adjustment shaft 20 is installed at the output end of the adjustment motor 19. When the adjustment motor 19 is started, its output end drives the adjustment shaft 20 to rotate. An adjustment gear 21 is fixedly installed at one end of the adjustment shaft 20. A guide tooth plate 22 is fixedly installed on the bottom wall of the guide block 16. The guide tooth plate 22 meshes with the adjustment gear 21. The output end of the adjustment motor 19 drives the adjustment gear 21 to rotate through the adjustment shaft 20. The rotating adjustment gear 21 can push the guide tooth plate 22 to slide smoothly to the right. A guide seat 23 is fixedly installed above the guide block 16. Multiple sets of support frames 24 are fixedly installed above the guide seat 23. The test pen 9 is fixedly installed inside the support frame 24. The guide block 16 drives the multiple sets of support frames 24 and the test pen 9 to move to the right synchronously through the guide seat 23 fixed above.

[0025] When using the DC resistance testing auxiliary device, firstly, the conical auxiliary block 5 is precisely inserted into the interior of the plum blossom contact 4 to ensure tight contact. Then, the adjusting motor 19 is started, and its output end drives the adjusting gear 21 to rotate through the adjusting shaft 20. Since the adjusting gear 21 is tightly meshed with the guide tooth plate 22, the rotating adjusting gear 21 can push the guide tooth plate 22 and its attached guide block 16 to slide smoothly to the right along the guide rod 17. The guide block 16 drives multiple sets of support frames 24 and the test pen 9 to move synchronously to the right through the guide seat 23 fixed above.

[0026] This smooth movement process ensures that the test probe 9 can be accurately aligned and inserted into the conical auxiliary block 5, thereby forming a stable test circuit with the circuit breaker body 2. During the test, the resistance tester 7 applies test signals to the conical auxiliary block 5 and the plum blossom contact 4 through the wire 8 and the test probe 9, and collects resistance data in real time. After processing, this data is clearly displayed on the screen 14.

[0027] During the test, the conical auxiliary block 5 is an insertable conical device that can have more contact surface with the contacts. At the same time, because it is insertable, the contact pressure is enhanced, reducing the risk of poor contact or line falling off during the test, reducing damage to the plum blossom contact 4, and further enhancing the accuracy of the test data. The entire test process is efficient and stable, providing strong support for the performance evaluation of the circuit breaker.

[0028] Through the above steps, when the DC resistance testing auxiliary device is in use, firstly, the conical auxiliary block 5 is precisely inserted into the interior of the plum blossom contact 4 to ensure tight contact. Then, the translation structure is activated, which drives multiple sets of test pens 9 to move synchronously to the right. This smooth movement process ensures that the test pens 9 can be accurately aligned and inserted into the interior of the conical auxiliary block 5, thereby forming a stable test circuit with the circuit breaker body 2. During the test, the resistance tester 7 applies test signals to the conical auxiliary block 5 and the plum blossom contact 4 through the wires 8 and the test pens 9, and collects resistance data in real time. After processing, these data are clearly displayed on the screen 14. During the test, the conical auxiliary block 5 is an insertable conical device, which can have more contact surface with the contact. At the same time, because it is insertable, the contact pressure is enhanced, reducing the risk of poor contact or wire falling off during the test, reducing damage to the plum blossom contact 4, and further enhancing the accuracy of the test data. The entire test process is efficient and stable, providing strong support for the performance evaluation of the circuit breaker.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A DC resistance testing device for a medium-voltage vacuum circuit breaker, comprising a base (1), a circuit breaker body (2), and a resistance tester (7), characterized in that: It also includes a connecting pipe (3), a plum blossom contact (4), a conical auxiliary block (5), an insulating cylinder (6), a wire (8), and a test pen (9). The circuit breaker body (2) is set on the upper right side of the base (1). Multiple sets of connecting pipes (3) are set on the left side of the circuit breaker body (2). A plum blossom contact (4) is set on the upper end of the connecting pipe (3). A conical auxiliary block (5) is set inside the plum blossom contact (4). An insulating cylinder (6) is fixedly set on the left side of the conical auxiliary block (5). A resistance tester (7) is set on the upper left side of the base (1). Multiple sets of wires (8) are set on the right side of the resistance tester (7). A test pen (9) is set on the right end of the wire (8). One end of the test pen (9) is set inside the conical auxiliary block (5).

2. The DC resistance testing device for medium voltage vacuum circuit breakers according to claim 1, characterized in that: A support base (10) is fixedly installed on the upper left side of the base (1), and a support platform (11) is fixedly installed above the support base (10). The resistance tester (7) is installed inside the support platform (11).

3. The DC resistance testing device for medium voltage vacuum circuit breakers according to claim 1, characterized in that: The resistance tester (7) has multiple buttons (12) on top, two handwheels (13) on top, and a screen (14) on top.

4. The DC resistance testing device for medium voltage vacuum circuit breakers according to claim 2, characterized in that: A support frame (15) is fixedly installed on the right side of the support platform (11). A guide rod (17) is installed inside the support frame (15). A guide block (16) is installed on the side wall of the guide rod (17). The guide block (16) is slidably connected to the guide rod (17).

5. The DC resistance testing device for medium voltage vacuum circuit breakers according to claim 4, characterized in that: A fixed seat (18) is fixedly installed on the bottom wall of the support frame (15). An adjustment motor (19) is fixedly installed inside the fixed seat (18). An adjustment shaft (20) is installed at the output end of the adjustment motor (19).

6. The DC resistance testing device for medium voltage vacuum circuit breakers according to claim 5, characterized in that: An adjusting gear (21) is fixedly installed at one end of the adjusting shaft (20), and a guide tooth plate (22) is fixedly installed on the bottom wall of the guide block (16). The guide tooth plate (22) meshes with the adjusting gear (21).

7. The DC resistance testing device for medium voltage vacuum circuit breakers according to claim 4, characterized in that: A guide seat (23) is fixedly installed above the guide block (16), and multiple sets of support frames (24) are fixedly installed above the guide seat (23). The test pen (9) is fixedly installed inside the support frame (24).

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