An adjustment and testing device for bimetallic strips of circuit breakers

Abstract

This utility model discloses an adjustment and testing device for a bimetallic strip in a circuit breaker, comprising a base plate, a first receiving plate fixedly connected to the upper end of the base plate, a snap-fit ​​assembly on the first receiving plate, and a second receiving plate fixedly connected to the upper end of the base plate, the second receiving plate being provided with an adjustment and detection assembly for measuring data. One end of a straight bimetallic strip to be tested is snapped into the third snap-fit ​​groove of the first snap-fit ​​plate, making the bimetallic strip in close contact with the second positive contact, thus achieving positive electrode connection; the other end of the bimetallic strip is snapped into the first snap-fit ​​groove of the second snap-fit ​​plate, making close contact with the negative contact, thus completing the negative electrode connection. At this time, the bimetallic strip forms a complete current loop. An irregularly shaped bimetallic strip is inserted between the second snap-fit ​​groove and the first snap-fit ​​groove to connect to an external power supply. The current is conducted to the bimetallic strip through the positive plate, the straight power supply plate, the current shunt plate, and the first and second positive contacts.

Description

Technical Field

[0001] This utility model relates to the field of bimetallic strip testing technology, specifically an adjustment and testing device for bimetallic strips in circuit breakers. Background Technology

[0002] Traditional testing devices have a simple structure but lack precision in fixing the bimetallic strip, which can easily lead to displacement or poor contact during testing, affecting the stability of current conduction and reducing the accuracy of test data. Furthermore, traditional devices are often single-function, making it difficult to adapt to the testing needs of different specifications and models of bimetallic strips, resulting in poor versatility. Their complex overall structure also makes installation, debugging, and maintenance cumbersome, increasing production costs and the workload of operators. Therefore, those skilled in the art have provided an adjustment and testing device for circuit breaker bimetallic strips to solve the problems mentioned in the background art. Utility Model Content

[0003] The purpose of this invention is to provide an adjustment and testing device for the bimetallic strip of a circuit breaker, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An adjustment and testing device for a bimetallic strip of a circuit breaker includes a base plate, a first receiving plate fixedly connected to the upper end of the base plate, a snap-fit ​​assembly provided on the first receiving plate, and a second receiving plate fixedly connected to the upper end of the base plate, the second receiving plate being provided with an adjustment and detection assembly for measuring data.

[0006] Furthermore, the snap-fit ​​assembly includes a first snap-fit ​​plate, a bimetallic strip, a first positive contact, a second snap-fit ​​groove, a straight power supply board, a current-carrying shunt board, a second positive contact, a third snap-fit ​​groove, and a positive plate. The positive plate is fixedly connected inside the first receiving plate, and the straight power supply board is fixedly connected to the positive plate.

[0007] Furthermore, the two ends of the straight power supply board are fixedly connected to a current-carrying shunt plate, and the two ends of the straight power supply board are fixedly connected to a first positive contact and a second positive contact through the current-carrying shunt plate.

[0008] Furthermore, a first snap-fit ​​plate is fixedly connected to the surface of the first receiving plate. The first snap-fit ​​plate has a second snap-fit ​​groove and a third snap-fit ​​groove. The first positive contact is located on the inner side wall of the second snap-fit ​​groove, and the second positive contact is located on the inner side wall of the third snap-fit ​​groove. The first snap-fit ​​plate is snapped with a bimetallic strip through the third snap-fit ​​groove.

[0009] Furthermore, the adjustment and detection assembly includes a second receiving plate, a negative electrode rod, a negative electrode contact, a first receiving groove, a connecting plate, a sliding block, a grating ruler slider, a grating ruler displacement sensor, a negative power supply contact, and an L-shaped power supply plate. The grating ruler displacement sensor is fixedly connected inside the second receiving plate, and the grating ruler slider is slidably connected to the grating ruler displacement sensor.

[0010] Furthermore, a sliding block is fixedly connected to the surface of the grating ruler slider, and a negative electrode rod is fixedly connected inside the second receiving plate, with the sliding block slidably connected to the surface of the negative electrode rod.

[0011] Furthermore, a connecting plate is fixedly connected to the surface of the sliding block, and a second snap-fit ​​plate is fixedly connected to one end of the connecting plate. An L-shaped power supply plate is provided inside the second snap-fit ​​plate, the connecting plate, and the sliding block.

[0012] Furthermore, one end of the L-shaped power supply board is fixedly connected to a negative power supply contact, and the surface of the negative power supply contact is attached to the negative rod. The other end of the L-shaped power supply board is fixedly connected to a negative contact.

[0013] Furthermore, the second contact plate has a first contact groove, the negative contact is attached to the inner sidewall of the first contact groove, and one end of the bimetallic strip is engaged in the first contact groove.

[0014] By adopting the above technical solution

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. A stable test architecture is formed by mounting a first receiving plate and a second receiving plate fixed on the base plate, respectively, and mounting a snap-fit ​​assembly and an adjustment and detection assembly. In the snap-fit ​​assembly, the second and third snap-fit ​​slots on the first snap-fit ​​plate cooperate with the positive plate, the straight power supply plate, the current shunt plate, the first positive contact, and the second positive contact to accurately fix the bimetallic strip and provide it with a stable current path. In the adjustment and detection assembly, the combination of the grating ruler displacement sensor with the grating ruler slider, the sliding block, and the connecting plate can accurately measure the displacement data of the bimetallic strip after it is energized and heated, greatly improving the detection accuracy and efficiency.

[0017] 2. The sliding connection design between the negative electrode rod and the sliding block allows the second snap-fit ​​plate to move flexibly within a certain range, which can adapt to the testing requirements of different specifications of bimetallic strips and enhance the versatility of the device. At the same time, the connection method between the L-shaped power supply board and the negative power supply contact and the negative contact ensures that a stable electrical connection is maintained at all times during the movement of the bimetallic strip, avoiding the impact of poor contact on the test results and ensuring the reliability of the test data.

[0018] 3. The overall device has a reasonable layout and compact structure. While realizing complex adjustment and testing functions, it effectively saves space and facilitates installation and maintenance. The snap-fit ​​and sliding connection between the components makes the installation, disassembly and debugging of the bimetallic strip simple and convenient, reducing the workload of operators and improving the efficiency of testing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a bimetallic strip adjustment and testing device for a circuit breaker;

[0020] Figure 2 This is a top-view cross-sectional schematic diagram of an adjustment and testing device for a bimetallic strip of a circuit breaker.

[0021] Figure 3 This is a side view sectional view of a test device for adjusting a bimetallic strip in a circuit breaker.

[0022] Figure 4 In this utility model Figure 2 A magnified view of the structure at point A;

[0023] In the diagram: 1. First receiving plate; 2. First snap-fit ​​plate; 3. Support base plate; 4. Second receiving plate; 5. Second snap-fit ​​plate; 6. Bimetallic strip; 7. Negative electrode rod; 8. Negative electrode contact; 9. First snap-fit ​​groove; 10. First positive electrode contact; 11. Second snap-fit ​​groove; 12. Straight power supply board; 13. Current shunt board; 14. Second positive electrode contact; 15. Third snap-fit ​​groove; 16. Positive electrode plate; 17. Connecting plate; 18. Sliding block; 19. Grating ruler slider; 20. Grating ruler displacement sensor; 21. Negative power supply contact; 22. L-shaped power supply board. Detailed Implementation

[0024] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the present utility model is further described below in conjunction with specific embodiments. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0025] Please see Figures 1-4This utility model provides an embodiment of an adjustment and testing device for a bimetallic strip in a circuit breaker, comprising a base plate 3, a first receiving plate 1 fixedly connected to the upper end of the base plate 3, a snap-fit ​​assembly on the first receiving plate 1, and a second receiving plate 4 fixedly connected to the upper end of the base plate 3, the second receiving plate 4 being provided with an adjustment and detection assembly for measuring data. The base plate 3 is made of high-strength, corrosion-resistant metal to ensure good stability and load-bearing capacity. The first receiving plate 1 and the second receiving plate 4 are vertically fixed to the upper end of the base plate 3 by bolts, and the first receiving plate 1 and the second receiving plate 4 are arranged parallel to each other and maintain a suitable distance to reserve space for subsequent component installation.

[0026] In this embodiment, the snap-fit ​​assembly includes a first snap-fit ​​plate 2, a bimetallic strip 6, a first positive contact 10, a second snap-fit ​​groove 11, a straight power supply board 12, a current-carrying shunt board 13, a second positive contact 14, a third snap-fit ​​groove 15, and a positive plate 16. The positive plate 16 is fixedly connected within the first receiving plate 1, and the straight power supply board 12 is fixedly connected to the positive plate 16. The current-carrying shunt boards 13 are fixedly connected to both ends of the straight power supply board 12, and the first positive contact 10 is fixedly connected to both ends of the straight power supply board 12 via the current-carrying shunt boards 13. The first receiving plate 1 has a first snap-fit ​​plate 2 fixedly connected to its surface. The first snap-fit ​​plate 2 has a second snap-fit ​​groove 11 and a third snap-fit ​​groove 15. The first positive contact 10 is located on the inner wall of the second snap-fit ​​groove 11, and the second positive contact 14 is located on the inner wall of the third snap-fit ​​groove 15. The first snap-fit ​​plate 2 is snapped with a bimetallic strip 6 through the third snap-fit ​​groove 15. An installation groove is pre-formed inside the first receiving plate 1, and the positive plate 16 is embedded into the installation groove and fixed by welding or high-strength bolts to ensure a firm connection. A straight power supply plate 12 is fixed to the upper surface of the positive plate 16 by welding, forming a stable electrical connection between the straight power supply plate 12 and the positive plate 16. Current-carrying shunt plates 13 are welded to both ends of the straight power supply plate 12, with the extension direction of the current-carrying shunt plates 13 perpendicular to the straight power supply plate 12. At the end of the energized shunt plate 13, the first positive contact 10 and the second positive contact 14 are fixed by threaded connection or welding to ensure good electrical connection between the contacts and the energized shunt plate 13. The first positive contact 10 is located on the inner side wall of the second snap-fit ​​groove 11, and the second positive contact 14 is located on the inner side wall of the third snap-fit ​​groove 15. The first snap-fit ​​plate 2 is fixed to the surface of the first receiving plate 1 by bolts. The positions of the second snap-fit ​​groove 11 and the third snap-fit ​​groove 15 on the first snap-fit ​​plate 2 correspond to the first positive contact 10 and the second positive contact 14, so that the bimetallic strip 6 can make good contact with the positive contact after snapping.

[0027] In this embodiment, the adjustment and detection assembly includes a second retaining plate 5, a negative electrode rod 7, a negative electrode contact 8, a first retaining groove 9, a connecting plate 17, a sliding block 18, a grating ruler slider 19, a grating ruler displacement sensor 20, a negative power supply contact 21, and an L-shaped power supply plate 22. A grating ruler displacement sensor 20 is fixedly connected inside the second retaining plate 4, and a grating ruler slider 19 is slidably connected to the grating ruler displacement sensor 20. A sliding block 18 is fixedly connected to the surface of the grating ruler slider 19. A negative electrode rod 7 is fixedly connected inside the second retaining plate 4, and the sliding block 18 is slidably connected to the surface of the negative electrode rod 7. A connecting plate 17 is fixedly connected to the surface of the sliding block 18, and a second retaining plate 5 is fixedly connected to one end of the connecting plate 17. The second retaining plate 5, the connecting plate 17, and the sliding block 19... An L-shaped power supply board 22 is provided inside the 8. One end of the L-shaped power supply board 22 is fixedly connected to a negative power supply contact 21, and the surface of the negative power supply contact 21 is attached to the negative rod 7. The other end of the L-shaped power supply board 22 is fixedly connected to a negative contact 8. A first snap-fit ​​groove 9 is provided on the second snap-fit ​​plate 5. The negative contact 8 is attached to the inner side wall of the first snap-fit ​​groove 9, and one end of the bimetallic strip 6 is snapped into the first snap-fit ​​groove 9. An installation cavity adapted to the grating ruler displacement sensor 20 is opened inside the second receiving plate 4. The grating ruler displacement sensor 20 is fixed in the installation cavity to ensure that its measurement direction is consistent with the expected deformation direction of the bimetallic strip 6. The grating ruler slider 19 is installed on the grating ruler displacement sensor 20 to ensure that the slider can slide freely along the grating ruler displacement sensor 20. A negative electrode rod 7 is fixedly installed inside the second receiving plate 4, so that the sliding block 18 fixed on the surface of the grating ruler slider 19 is sleeved on the negative electrode rod 7, realizing the sliding connection of the sliding block 18 on the surface of the negative electrode rod 7. A connecting plate 17 is fixed on the surface of the sliding block 18 by bolts, and one end of the connecting plate 17 extends to the outside of the second receiving plate 4. A second snap-fit ​​plate 5 is fixed at the end of the connecting plate 17 by bolts. A channel is pre-opened in the second snap-fit ​​plate 5, the connecting plate 17 and the sliding block 18 for installing an L-shaped power supply board. The L-shaped power supply board is installed in the channel of the second snap-fit ​​plate 5, the connecting plate 17 and the sliding block 18. One end of the L-shaped power supply board is fixedly connected to the negative electrode power supply contact 21, so that the surface of the negative electrode power supply contact 21 is tightly attached to the negative electrode rod 7 to ensure stable electrical connection; the other end is fixedly connected to the negative electrode contact 8, so that the negative electrode contact 8 is attached to the inner side wall of the first snap-fit ​​groove 9 on the second snap-fit ​​plate 5.

[0028] One end of the straight bimetallic strip 6 to be tested is inserted into the third slot 15 of the first snap-fit ​​plate 2, so that the bimetallic strip 6 is in close contact with the second positive contact 14, realizing positive electrode connection; the other end of the bimetallic strip 6 is inserted into the first slot 9 of the second snap-fit ​​plate 5, and is in close contact with the negative contact 8, completing the negative electrode connection. At this time, the bimetallic strip 6 forms a complete current loop. The irregularly shaped bimetallic strip 6 is inserted between the second slot 11 and the first slot 9 to connect the external power supply. The current is conducted to the bimetallic strip 6 through the positive plate 16, the straight power supply plate 12, the current shunt plate 13, the first positive contact 10 and the second positive contact 14, and at the same time, a current loop is formed through the L-shaped power supply plate, the negative power supply contact 21, the negative rod 7 and the negative contact 8. Before the test begins, the bimetallic strip 6 can be adjusted according to the specifications of the bimetallic strip 6 by sliding block 18. The sliding action on the negative electrode rod 7 adjusts the position of the second locking plate 5, placing the bimetallic strip 6 in a suitable initial test state. When current flows through the bimetallic strip 6, it deforms due to heat caused by the current, pushing the second locking plate 5 and its connected sliding block 18 and grating ruler slider 19 to move on the negative electrode rod 7 and grating ruler displacement sensor 20. The grating ruler displacement sensor 20 monitors the displacement change of the grating ruler slider 19 in real time and transmits the data to an external data processing device to accurately record the deformation displacement data of the bimetallic strip 6. The external data processing device analyzes and processes the received displacement data, compares it with preset standard data, and determines whether the performance of the bimetallic strip 6 meets the requirements. After the test is completed, the power is disconnected, and the bimetallic strip 6 is removed from the first locking slot 9 and the third locking slot 15, completing one test procedure.

[0029] A stable test architecture is formed by mounting a snap-fit ​​assembly and an adjustment and detection assembly on the first receiving plate 1 and the second receiving plate 4 fixed on the base plate 3, respectively. In the snap-fit ​​assembly, the second snap-fit ​​groove 11 and the third snap-fit ​​groove 15 on the first snap-fit ​​plate 2 cooperate with the positive electrode plate 16, the straight power supply plate 12, the current shunt plate 13, the first positive electrode contact 10 and the second positive electrode contact 14 to accurately fix the bimetallic strip 6 and provide it with a stable current path. In the adjustment and detection assembly, the combination of the grating ruler displacement sensor 20 with the grating ruler slider 19, the sliding block 18 and the connecting plate 17 can accurately measure the displacement data of the bimetallic strip 6 after it is energized and heated, which greatly improves the detection accuracy and efficiency. The negative electrode rod 7 and the sliding block 18 The sliding connection design allows the second snap-fit ​​plate 5 to move flexibly within a certain range, adapting to the testing requirements of different specifications of bimetallic strips 6 and enhancing the versatility of the device. At the same time, the connection method between the L-shaped power supply board and the negative power supply contact 21 and negative contact 8 ensures that a stable electrical connection is maintained during the movement of the bimetallic strip 6, avoiding the impact of poor contact on test results and ensuring the reliability of test data. The overall device has a reasonable layout and compact structure, which effectively saves space while realizing complex adjustment and testing functions, and facilitates installation and maintenance. Moreover, the snap-fit ​​and sliding connection methods between the components make the installation, disassembly, and debugging of the bimetallic strip 6 simple and convenient, reducing the workload of operators and improving the efficiency of testing.

[0030] This specification describes the embodiments, but not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for adjusting and testing the bimetallic strip of a circuit breaker, comprising a supporting base plate (3), characterized in that, The upper end of the bearing base plate (3) is fixedly connected to a first receiving plate (1), and a snap-fit ​​assembly is provided on the first receiving plate (1). The upper end of the bearing base plate (3) is fixedly connected to a second receiving plate (4), and an adjustment and detection assembly for measuring data is provided on the second receiving plate (4).

2. The adjustment and testing device for a bimetallic strip of a circuit breaker according to claim 1, characterized in that, The snap-fit ​​assembly includes a first snap-fit ​​plate (2), a bimetallic strip (6), a first positive contact (10), a second snap-fit ​​groove (11), a straight power supply board (12), a current-carrying shunt board (13), a second positive contact (14), a third snap-fit ​​groove (15), and a positive plate (16). The positive plate (16) is fixedly connected inside the first receiving plate (1), and the straight power supply board (12) is fixedly connected on the positive plate (16).

3. The adjustment and testing device for a bimetallic strip of a circuit breaker according to claim 2, characterized in that, The straight power supply board (12) is fixedly connected to a power shunt board (13) at both ends, and the straight power supply board (12) is fixedly connected to a first positive contact (10) and a second positive contact (14) at both ends through the power shunt board (13).

4. The adjustment and testing device for a bimetallic strip of a circuit breaker according to claim 3, characterized in that, The first receiving plate (1) is fixedly connected to the surface of the first receiving plate (1). The first receiving plate (2) is provided with a second receiving groove (11) and a third receiving groove (15). The first positive contact (10) is located on the inner side wall of the second receiving groove (11), and the second positive contact (14) is located on the inner side wall of the third receiving groove (15). The first receiving plate (2) is connected to the bimetallic strip (6) through the third receiving groove (15).

5. The adjustment and testing device for a bimetallic strip of a circuit breaker according to claim 4, characterized in that, The adjustment and detection assembly includes a second snap-fit ​​plate (5), a negative electrode rod (7), a negative electrode contact (8), a first snap-fit ​​groove (9), a connecting plate (17), a sliding block (18), a grating ruler slider (19), a grating ruler displacement sensor (20), a negative electrode power supply contact (21), and an L-shaped power supply plate (22). The grating ruler displacement sensor (20) is fixedly connected inside the second receiving plate (4), and the grating ruler slider (19) is slidably connected to the grating ruler displacement sensor (20).

6. The adjustment and testing device for a bimetallic strip of a circuit breaker according to claim 5, characterized in that, A sliding block (18) is fixedly connected to the surface of the grating ruler slider (19), and a negative pole rod (7) is fixedly connected inside the second receiving plate (4). The sliding block (18) is slidably connected to the surface of the negative pole rod (7).

7. The adjustment and testing device for a bimetallic strip of a circuit breaker according to claim 6, characterized in that, A connecting plate (17) is fixedly connected to the surface of the sliding block (18), and a second snap-fit ​​plate (5) is fixedly connected to one end of the connecting plate (17). An L-shaped power supply plate (22) is provided inside the second snap-fit ​​plate (5), the connecting plate (17), and the sliding block (18).

8. The adjustment and testing device for a bimetallic strip of a circuit breaker according to claim 7, characterized in that, One end of the L-shaped power supply board (22) is fixedly connected to a negative power supply contact (21), and the surface of the negative power supply contact (21) is attached to the negative rod (7). The other end of the L-shaped power supply board (22) is fixedly connected to a negative contact (8).

9. The adjustment and testing device for a bimetallic strip of a circuit breaker according to claim 8, characterized in that, The second snap-on plate (5) has a first snap-on groove (9), the negative contact (8) is attached to the inner side wall of the first snap-on groove (9), and one end of the bimetallic strip (6) is snapped into the first snap-on groove (9).

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