Testing device for circuit breaker

Abstract

The invention relates to the field of circuit breaker testing equipment, and discloses a testing device for a circuit breaker, which comprises a testing box, and two sliding blocks are mounted on a top box body of the testing box in a limiting and sliding manner; the top of each sliding block is provided with a spring telescopic rod, the telescopic ends of the two spring telescopic rods are each fixedly provided with a detection plug, and the non-telescopic ends of the two spring telescopic rods are each fixedly connected with a wire. The detection plug and the wire which are located on the same spring telescopic rod are electrically connected through a contact switch which is installed on the spring telescopic rod. A top plate is slidably mounted on a top box body of the test box; a rubber pad is fixed at the top of the top plate; a supporting plate is fixed in the test box and is provided with a sliding shaft; a power mechanism, a first transmission assembly and a second transmission assembly are mounted on the test box; the power mechanism is in transmission connection with the sliding shaft; the sliding shaft drives the two sliding blocks to slide relatively through the first transmission assembly and drives the top plate to slide up and down through the second transmission assembly. The device is high in automation degree, small in electric shock risk and convenient to use.

Description

Technical Field

[0001] The present invention relates to the field of circuit breaker testing equipment, and particularly relates to a testing device for a circuit breaker. Background Art

[0002] In order to ensure the safety, reliability and performance of a circuit breaker, after the circuit breaker is completed in production and assembly, it needs to be tested, and only the circuit breaker that passes the test can be packed and shipped out. The tests of the circuit breaker include items such as overload trip test, short - circuit trip test, mechanical operation test, etc.

[0003] A circuit breaker testing device and testing method described in the published patent No. CN117452210A includes an assembly platform and a circuit breaker body located above the assembly platform. The upper part of the circuit breaker body is provided with a switch for opening and closing, and power connection ports are provided on two pairs of side surfaces of the circuit breaker body. Above the assembly platform, there are a positioning mechanism and an elastic clamping mechanism distributed oppositely.

[0004] Based on the above - mentioned technical features, the problems that occur are as follows: In the prior art, the clamping, positioning of the circuit breaker and the docking of the connectors all need to be manually operated, with low automation degree, high electric shock risk, and inconvenient to use.

[0005] Therefore, it is very necessary to solve the above problems through a testing device for a circuit breaker. Summary of the Invention

[0006] The purpose of the present invention is to provide a testing device for a circuit breaker to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A testing device for a circuit breaker includes a testing box. The top box body of the testing box is a testing platform. Two chutes communicating with the testing box are symmetrically opened on the testing platform. A slider is installed in each chute in a limited - sliding manner.

[0008] A spring telescopic rod is arranged on the top of each slider. The telescopic ends of the two spring telescopic rods are coaxially opposed in the horizontal direction, and the non - telescopic ends of the two spring telescopic rods are fixedly connected to the corresponding sliders.

[0009] A detection plug is fixedly arranged on the telescopic end of each of the two spring telescopic rods, and a wire is fixedly connected to the non - telescopic end of each of the two spring telescopic rods. The detection plug and the wire on the same spring telescopic rod are electrically connected through a contact switch installed on the spring telescopic rod.

[0010] A sunken groove is opened on the testing platform, and the sunken groove is located between the two chutes. A top plate that can slide up and down is installed in the sunken groove. A rubber pad for restricting the movement of the circuit breaker is fixedly arranged on the top of the top plate.

[0011] A support plate is fixedly arranged inside the test box. A sliding shaft that can slide up and down is installed on the support plate, and the sliding shaft slidably penetrates through the support plate.

[0012] A power mechanism, a first transmission assembly, and a second transmission assembly are installed on the test box; the power mechanism is in transmission connection with the sliding shaft; the sliding shaft drives two sliders to slide relative to each other through the first transmission assembly, and the sliding shaft drives the top plate to slide up and down through the second transmission assembly.

[0013] Preferably, the power mechanism includes a worm gear and a worm; a threaded section is arranged on the sliding shaft, the worm gear is sleeved on the sliding shaft and is rotatably connected to the support plate, and the worm gear is in threaded connection with the threaded section; the sliding shaft is in limited rotation fit with the test box; the worm is rotatably installed inside the test box and is in meshing fit with the worm gear; a motor is fixedly installed on the test box, and the output shaft of the motor is coaxially and fixedly connected with the worm.

[0014] Preferably, the first transmission assembly includes two transmission rods, and the two transmission rods correspond to the two sliders one by one; one end of each transmission rod is hinged to the sliding shaft, and the other end of each transmission rod is hinged to the bottom of the corresponding slider; the two transmission rods are symmetrically arranged in an inverted V shape relative to the sliding shaft.

[0015] Preferably, the second transmission assembly includes a gear. A support shaft is fixedly arranged inside the test box, and the gear is rotatably sleeved on the support shaft; a vertical plate is fixedly arranged at the bottom of the top plate, and the vertical plate penetrates through the test bench and is in limit sliding fit with the test bench; a vertically arranged first rack is fixedly installed on the vertical plate, and the first rack is in meshing fit with the gear; a vertically arranged second rack is fixedly installed on the sliding shaft, and the second rack is in contact meshing fit with the gear.

[0016] Preferably, a spring is arranged inside the non - telescopic end of the spring telescopic rod along the sliding direction of the telescopic end; one end of the spring is fixedly connected to the telescopic end, and the other end of the spring is fixedly connected to the non - telescopic end.

[0017] Preferably, the contact switch includes a first contact and a second contact; the first contact is electrically connected to a wire, and the second contact is electrically connected to a detection plug; an installation groove is formed on the inner wall of the non - telescopic end of the spring telescopic rod, and the first contact is fixedly installed in the installation groove; the second contact is fixed on the telescopic end of the spring telescopic rod and is slidably arranged in the installation groove.

[0018] Preferably, the detection plug includes a fixing plate and a detection head; the fixing plate is fixed on the telescopic end of the spring telescopic rod, and the detection head is fixed on the fixing plate; the detection head is electrically connected to the second contact.

[0019] Preferably, the fixing plate, the telescopic end, and the non - telescopic end of the spring telescopic rod are all made of insulating materials.

[0020] Preferably, the slider is an I-shaped block, the test bench is clamped between the upper and lower blocks of the I-shaped block, and the middle block of the I-shaped block is in limit sliding fit with the chute.

[0021] Preferably, the first contact is in the shape of a sheet, and the second contact is in sliding contact with the first contact.

[0022] Technical effects and advantages of the present invention: The relative sliding of the two sliders and the up-and-down sliding of the top plate of the present invention can be automatically carried out through the up-and-down sliding of the sliding shaft; at the same time, the up-and-down sliding of the sliding shaft is automatically carried out by the power mechanism, and the clamping, positioning of the circuit breaker and the docking of the joints do not require manual operation, with high automation, low electric shock risk and convenient use. Description of the Drawings

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 is a schematic diagram of the inside of the test box of the present invention;

[0025] Figure 3 is a partial schematic diagram of the inside of the test box of the present invention;

[0026] Figure 4 is an enlarged schematic diagram of part A of the present invention;

[0027] Figure 5 is a schematic diagram of the top plate of the present invention;

[0028] Figure 6 is a schematic diagram of the spring telescopic rod of the present invention;

[0029] Figure 7 is an enlarged schematic diagram of part B of the present invention;

[0030] Figure 8 is a schematic diagram of the inside of the spring telescopic rod of the present invention.

[0031] In the figure: 1. Test box; 2. Rotating shaft; 3. Motor; 4. Worm; 5. Support plate; 6. Worm gear; 7. Thread section; 8. Sliding shaft; 9. Transmission rod; 10. Slider; 11. Non-telescopic end; 12. Wire; 13. Installation groove; 14. First contact; 15. Guide block; 16. Telescopic end; 17. Spring; 18. Second contact; 19. Fixed plate; 20. Detection head; 21. Top plate; 22. Rubber pad; 23. Vertical plate; 24. First rack; 25. Installation block; 26. Support shaft; 27. Gear; 28. Second rack. Detailed Embodiments

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] The present invention provides Figures 1 to 8 A test device for a circuit breaker shown in the figure comprises a test box 1, the top box of the test box 1 being a horizontal test bench. Two slide slots connected to the test box 1 are symmetrically provided on the test bench, and a slider 10 is installed in each slide slot for limited sliding. Each slider 10 is an I-shaped block. The test bench is sandwiched between the upper and lower blocks of the I-shaped block, and the block in the middle of the I-shaped block is in limited sliding cooperation with the slide slot.

[0034] A horizontal support plate 5 is fixedly arranged in the test box 1, and a sliding shaft 8 which can slide up and down is installed on the support plate 5. The sliding shaft 8 slides through the support plate 5 and is limitedly slidably matched with the support plate 5. A power mechanism is installed on the test box 1, and the power mechanism is connected to the sliding shaft 8 in a transmission manner.

[0035] Specifically, the power mechanism includes a worm wheel 6 and a worm 4. A threaded section 7 is provided on the sliding shaft 8, the worm wheel 6 is sleeved on the sliding shaft 8 and is rotatably connected to the support plate 5, and the worm wheel 6 is threadedly connected to the threaded section 7. The sliding shaft 8 is limited in rotation with the test box 1. The rotating shaft 2 is horizontally placed in the test box 1, and the rotating shaft 2 is rotatably connected to the test box 1. The worm 4 is coaxially fixedly connected to the rotating shaft 2, and the worm 4 is meshed with the worm wheel 6. The motor 3 is fixedly installed on the test box 1, and the output shaft of the motor 3 is coaxially fixedly connected to the rotating shaft 2 connected to the worm 4.

[0036] A first transmission assembly is installed in the test box 1 , and the sliding shaft 8 drives the two sliding blocks 10 to slide relative to each other through the first transmission assembly.

[0037] Specifically, the first transmission assembly includes two transmission rods 9, which are symmetrically arranged in an inverted eight shape relative to the sliding shaft 8. The two transmission rods 9 correspond one to one with the two sliding blocks 10. One end of each transmission rod 9 is hinged to the sliding shaft 8, and the other end of each transmission rod 9 is hinged to the bottom of the corresponding sliding block 10.

[0038] A spring telescopic rod is disposed on the top of each slider 10 , and the telescopic ends 16 of the two spring telescopic rods are coaxially opposed in the horizontal direction, and the non-telescopic ends 11 of the two spring telescopic rods are fixedly connected to the slider 10 .

[0039] Specifically, a spring 17 is arranged in the non-telescopic end 11 of the spring telescopic rod along the sliding direction of the telescopic end 16. One end of the spring 17 is fixedly connected to the telescopic end 16, and the other end of the spring 17 is fixedly connected to the non-telescopic end 11.

[0040] A detection plug is fixedly arranged at the adjacent end of the telescopic ends 16 of the two spring telescopic rods, and wires 12 are fixedly connected to the opposite ends of the non-telescopic ends 11 of the two spring telescopic rods. The detection plug and the wire 12 on the same spring telescopic rod are electrically connected through a contact switch installed on the spring telescopic rod.

[0041] Specifically, the contact switch includes a first contact 14 and a second contact 18. The first contact 14 is electrically connected to the wire 12, and the second contact 18 is electrically connected to the detection plug. An installation groove 13 is formed on the inner wall of the non-telescopic end 11 of the spring telescopic rod. The first contact 14 is in the shape of a sheet and is fixedly installed in the installation groove 13.

[0042] A guide block 15 is fixedly arranged on the telescopic end 16 of the spring telescopic rod. The guide block 15 is located in the installation groove 13 and is in limit sliding fit with the installation groove 13. The second contact 18 is fixed on the guide block 15 and is located in the installation groove 13. The second contact 18 is in sliding contact with the first contact 14.

[0043] Specifically, the detection plug includes a fixing plate 19 and a detection head 20. The fixing plate 19 is fixed on the telescopic end 16 of the spring telescopic rod, and the detection head 20 is fixed on the fixing plate 19. The detection head 20 is electrically connected to the second contact 18.

[0044] The fixing plate 19, the telescopic end 16, and the non-telescopic end 11 of the spring telescopic rod are all made of insulating materials.

[0045] A sunken groove is formed on the test bench, and the sunken groove is located between the two sliding grooves. The sunken groove penetrates through the test bench downward, and a U-shaped support frame is fixedly arranged at the bottom of the test bench. A top plate 21 that can slide up and down is installed in the sunken groove, and the top plate 21 matches the sunken groove. The bottom of the top plate 21 is in contact limit fit with the frame of the support frame, and a rubber pad 22 that restricts the movement of the circuit breaker is fixedly arranged at the top of the top plate 21.

[0046] A second transmission component is installed in the test box 1, and the sliding shaft 8 drives the top plate 21 to slide up and down through the second transmission component. In this embodiment, the number of the second transmission components is two, and the two second transmission components are centrosymmetric with respect to the center of the sliding shaft 8. And the two second transmission components and the two transmission rods 9 are distributed in a cross shape.

[0047] Specifically, the second transmission component includes a gear 27. An installation block 25 is fixedly arranged in the test box 1, a horizontal support shaft 26 is rotatably installed on the installation block 25, and the gear 27 is rotatably sleeved on the support shaft 26.

[0048] A vertical plate 23 is fixedly arranged at the bottom of the top plate 21. The vertical plate 23 penetrates through the support frame and is in limit sliding fit with the support frame.

[0049] A vertical first rack 24 is fixedly mounted on the vertical plate 23 , and the first rack 24 is meshed with the gear 27 .

[0050] A clearance groove is provided in the axial direction of the sliding shaft 8, and a second rack 28 is vertically arranged in the clearance groove, and the second rack 28 is fixedly connected to the sliding shaft 8. The gear 27 penetrates into the clearance groove, and the second rack 28 and the gear 27 are in contact meshing cooperation.

[0051] A stopper is fixedly arranged on the mounting block 25 , and the first rack 24 is located between the gear 27 and the stopper, and the first rack 24 is in limited sliding cooperation with the stopper.

[0052] Working principle: When using this test device to test the circuit breaker, first place the circuit breaker on the rubber pad 22, and align the wiring holes on both sides of the circuit breaker with the detection head 20. At this time, start the motor 3. The output shaft of the motor 3 drives the rotating shaft 2 to rotate, and the rotating shaft 2 drives the worm 4 to rotate. The worm 4 drives the worm wheel 6 to rotate, and the worm wheel 6 drives the sliding shaft 8 to move downward through the threaded section 7.

[0053] When the sliding shaft 8 moves downward, the two transmission rods 9 are driven to move downward. When the two transmission rods 9 move downward, the ends away from the sliding shaft 8 rotate closer. In this process, the two transmission rods 9 drive the two sliders 10 to slide closer. The two sliders 10 drive the two spring telescopic rods to move closer, and the telescopic ends 16 of the two spring telescopic rods push the detection head 20 to move closer to the corresponding wiring hole through the fixing plate 19. At this time, the position of the short circuiter can be adjusted to ensure that the detection head 20 is finally inserted into the corresponding wiring hole.

[0054] After the detection head 20 is inserted into the wiring hole, it gradually abuts against the circuit breaker. After that, the detection head 20, the fixing plate 19 and the telescopic end 16 of the spring telescopic rod stop moving. At the same time, the non-telescopic ends 11 of the two spring telescopic rods move close to the circuit breaker and compress the corresponding springs 17. In this process, the non-telescopic ends 11 of the two spring telescopic rods drive the first contact 14 to move close to the second contact 18 and finally slide in contact with the second contact 18. At this time, the circuit breaker is energized.

[0055] When the sliding shaft 8 moves downward, it also drives the second rack 28 to move synchronously. When the first contact 14 and the second contact 18 are in sliding contact, the second rack 28 gradually meshes with the gear 27 and drives the gear 27 to rotate. At this time, the gear 27 drives the first rack 24 to move upward. The first rack 24 drives the top plate 21 to slide upward, and the top plate 21 drives the rubber pad 22 to contact and abut the circuit breaker, thereby limiting the circuit breaker. In this process, the top plate 21 is always located in the sink.

[0056] When the rubber pad 22 and the circuit breaker form a limit, the motor 3 is shut down. Next, the switch on the circuit breaker is pushed to perform a test.

[0057] After the test is completed, the output shaft of the motor 3 reverses, the two sliders 10 slide away from each other, and the top plate 21 slides down. When the two sliders 10 slide to the farthest distance between the two chutes, turn off the motor 3 and remove the circuit breaker.

[0058] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A test device for a circuit breaker, comprising a test box (1), characterized in that: The top box of the test box (1) is a test bench, and two slide slots connected to the test box (1) are symmetrically arranged on the test bench, and a slider (10) is installed in each slide slot for limited sliding. A spring telescopic rod is disposed on the top of each slider (10), the telescopic ends (16) of the two spring telescopic rods are coaxially opposed in the horizontal direction, and the non-telescopic ends (11) of the two spring telescopic rods are fixedly connected to the slider (10); A detection plug is fixedly arranged on the telescopic ends (16) of the two spring telescopic rods, and a wire (12) is fixedly connected to the non-telescopic ends (11) of the two spring telescopic rods; the detection plug and the wire (12) located on the same spring telescopic rod are electrically connected via a contact switch installed on the spring telescopic rod; The test bench is provided with a sinking groove, which is located between two slide grooves; a top plate (21) that can slide up and down is installed in the sinking groove, and a rubber pad (22) that limits the movement of the circuit breaker is fixedly arranged on the top of the top plate (21); A support plate (5) is fixedly arranged in the test box (1), and a sliding shaft (8) that can slide up and down is installed on the support plate (5), and the sliding shaft (8) slides through the support plate (5); The test box (1) is equipped with a power mechanism, a first transmission assembly and a second transmission assembly; the power mechanism is connected to a sliding shaft (8); the sliding shaft (8) drives two sliding blocks (10) to slide relative to each other through the first transmission assembly, and the sliding shaft (8) drives a top plate (21) to slide up and down through the second transmission assembly.

2. The test device for a circuit breaker according to claim 1, characterized in that: The power mechanism comprises a worm wheel (6) and a worm (4); a threaded section (7) is arranged on the sliding shaft (8); the worm wheel (6) is sleeved on the sliding shaft (8) and is rotatably connected to the support plate (5); the worm wheel (6) is threadedly connected to the threaded section (7); the sliding shaft (8) is limitedly matched with the test box (1); the worm (4) is rotatably installed in the test box (1) and meshes with the worm wheel (6); the motor (3) is fixedly installed on the test box (1), and the output shaft of the motor (3) is coaxially fixedly connected to the worm (4).

3. The test device for a circuit breaker according to claim 1, characterized in that: The first transmission assembly comprises two transmission rods (9), the two transmission rods (9) corresponding to the two sliders (10) one by one; one end of each transmission rod (9) is hinged to the slide shaft (8), and the other end of each transmission rod (9) is hinged to the bottom of the corresponding slider (10); the two transmission rods (9) are symmetrically arranged in an inverted eight shape relative to the slide shaft (8).

4. The test device for a circuit breaker according to claim 1, characterized in that: The second transmission assembly comprises a gear (27); a support shaft (26) is fixedly arranged in the test box (1), and the gear (27) is rotatably sleeved on the support shaft (26); a vertical plate (23) is fixedly arranged at the bottom of the top plate (21), and the vertical plate (23) passes through the test bench and is limitedly slidably engaged with the test bench; a vertical first rack (24) is fixedly mounted on the vertical plate (23), and the first rack (24) is meshed with the gear (27); a vertical second rack (28) is fixedly mounted on the sliding shaft (8), and the second rack (28) is contact-meshed with the gear (27).

5. A test device for a circuit breaker according to claim 1, characterized in that: A spring (17) is arranged inside the non-extensible end (11) of the spring telescopic rod along the sliding direction of the extensible end (16); one end of the spring (17) is fixedly connected to the extensible end (16), and the other end of the spring (17) is fixedly connected to the non-extensible end (11).

6. The test device for a circuit breaker according to claim 5, wherein: The contact switch includes a first contact (14) and a second contact (18); the first contact (14) is electrically connected to a wire (12), and the second contact (18) is electrically connected to a detection plug; an installation groove (13) is formed on the inner wall of the non-extensible end (11) of the spring telescopic rod, and the first contact (14) is fixedly installed in the installation groove (13); the second contact (18) is fixed on the extensible end (16) of the spring telescopic rod and is slidably arranged in the installation groove (13).

7. The test device for a circuit breaker according to claim 6, characterized in that: The detection plug includes a fixing plate (19) and a detection head (20); the fixing plate (19) is fixed on the extensible end (16) of the spring telescopic rod, and the detection head (20) is fixed on the fixing plate (19); the detection head (20) is electrically connected to the second contact (18).

8. A test device for a circuit breaker according to claim 7, characterized in that: The fixing plate (19), the extensible end (16) of the spring telescopic rod, and the non-extensible end (11) are all made of insulating materials.

9. The test device for a circuit breaker according to claim 1, characterized in that: The slider (10) is an I-shaped block, and the test bench is clamped between the upper and lower blocks of the I-shaped block. The middle block of the I-shaped block is in limit sliding fit with the sliding groove.

10. A test device for a circuit breaker according to claim 6, characterized in that: The first contact (14) is in a sheet shape, and the second contact (18) is in sliding contact with the first contact (14).

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