A sealing device for a molded case circuit breaker

Abstract

This utility model relates to the technical field of sealing devices for molded case circuit breakers, specifically, to a sealing device for molded case circuit breakers. A sealing device for a molded case circuit breaker includes a circuit breaker body, mounting slots on both sides of the circuit breaker body, and moving and stationary contacts. The moving and stationary contacts are respectively fixedly connected to the mounting slots on both sides of the circuit breaker body. The circuit breaker body includes a first housing and a second housing, which are fixedly connected. A support base is fixedly connected to the upper side of the second housing, and a plurality of reset posts are fixedly connected to the support base. A transmission plate is slidably connected to each reset post, and a baffle plate is fixedly connected to the lower end of each transmission plate. The width of each baffle plate is greater than the width of the mounting slot. Guide slots are provided on both sides of the second housing. This technical solution improves the safety of operators and facilitates the use of the baffle plates.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing devices for molded case circuit breakers, specifically to sealing devices for molded case circuit breakers. Background Technology

[0002] With the continuous development of technology, the application of electricity resources has become increasingly widespread, making it an indispensable and important infrastructure in modern society. The safety and reliability of the power system are directly related to the normal operation of various industries, thus placing increasingly higher demands on power equipment. Among numerous power devices, molded case circuit breakers (MCCBs) are widely favored due to their excellent performance and diverse application scenarios. An MCB is an electrical device that integrates overload, short-circuit, and leakage protection, possessing excellent circuit breaking performance and overload protection capabilities. Its casing is made of plastic, making it both lightweight and durable, effectively resisting the influence of the external environment. Due to its design flexibility and scalability, MCBs can be selected in different specifications and models according to actual needs, meeting the requirements of various power systems.

[0003] In existing molded case circuit breakers, most terminals are exposed, a design that poses safety hazards. First, exposed terminals are susceptible to moisture and dust from the environment. In humid environments, moisture may seep into the terminals, causing short circuits or electrical faults. This hazard is particularly pronounced during rainy seasons or in areas with high humidity. Accumulated moisture and dust not only affect normal current conduction but may also trigger more serious electrical accidents, jeopardizing the normal operation of the equipment. Second, exposed terminals pose a risk of accidental contact during maintenance and repair. Especially in industrial environments, workers often operate in confined spaces, and accidental contact with exposed terminals could lead to electric shock, seriously threatening personal safety. Even when not in operation, current may remain active under certain conditions, posing a potential danger to unintentionally touched personnel. Utility Model Content

[0004] This utility model proposes a sealing device for molded case circuit breakers, which improves the safety of operators and facilitates the use of the baffle by operators.

[0005] The technical solution of this utility model is as follows:

[0006] A sealing device for a molded case circuit breaker includes a circuit breaker body, mounting slots formed on both sides of the circuit breaker body, and moving and stationary contacts, wherein the moving and stationary contacts are respectively fixedly connected to the mounting slots on both sides of the circuit breaker body.

[0007] The circuit breaker body includes a first housing and a second housing. The first housing and the second housing are fixedly connected. A support base is fixedly connected to the upper side of the second housing. A plurality of reset posts are fixedly connected to the support base. A transmission plate is slidably connected to each reset post. A baffle plate is fixedly connected to the lower end of each transmission plate. The width of each baffle plate is greater than the width of the mounting groove.

[0008] Guide grooves are provided on both sides of the second housing, and a guide post is fixedly connected to the end of each transmission plate facing the second housing. Each guide post abuts against the inner wall of each guide groove.

[0009] Each transmission plate is connected to a clamping assembly on the side facing the second housing for limiting and clamping several transmission plates.

[0010] Furthermore, the clamping assembly includes several locking pins, each of which is fixedly connected to the side of the transmission plate facing the second housing.

[0011] Each of the snap-fit ​​posts has a snap-fit ​​block abutting on one side, and a linkage plate is fixedly connected to the lower end of each snap-fit ​​block. A linkage post is slidably connected to the linkage plate, and a first support plate and a second support plate are fixedly connected to both ends of the linkage post. Both the first support plate and the second support plate are fixedly connected to the support base.

[0012] A limiting plate is fixedly connected between the first support plate and the second support plate. A locking spring is sleeved on the linkage column, and the two ends of the locking spring abut against the linkage plate and the limiting plate, respectively.

[0013] Furthermore, the snap-fit ​​block has an inclined groove facing the snap-fit ​​post, the inclined groove abuts against the snap-fit ​​post, and a positioning groove is formed on the side of the snap-fit ​​block away from the inclined groove, the inner diameter of the positioning groove being the same as the outer diameter of the snap-fit ​​post.

[0014] Furthermore, an adjusting plate is fixedly connected to the lower side of the linkage plate near the first support plate, an adjusting sleeve is fixedly connected to the adjusting plate, an adjusting screw is threaded onto the adjusting sleeve, a protective plate is rotatably connected to the adjusting screw, and the protective plate is fixedly connected to the support base.

[0015] Furthermore, each of the reset posts is fitted with a reset spring, and the two ends of each reset spring abut against the reset post and the transmission plate, respectively.

[0016] Furthermore, a receiving block is fixedly connected to one side of each of the transmission plates, and a clamping block is slidably connected to the side of each receiving block away from the transmission plate. A clamping spring is connected between the clamping block and the receiving block.

[0017] A limiting frame is slidably connected to one side of the receiving block, and the limiting frame is fixedly connected to the support base.

[0018] Furthermore, each of the transmission plates is provided with a transmission groove, and each of the reset posts abuts against the inner wall of the transmission groove.

[0019] Furthermore, each of the aforementioned transmission plates is fixedly connected to a traction column, and each of the aforementioned traction columns is fixedly connected to an anti-slip block on its lower side.

[0020] Furthermore, connecting plates are fixedly connected to the two support bases.

[0021] The beneficial effects of this utility model are as follows:

[0022] By using the clamping assembly, the grid plates on the same side can be simultaneously restricted, ensuring that when a worker inspects a single grid plate, it will not affect other grid plates. Furthermore, the clamping assembly limits the movement of other grid plates and, in turn, facilitates easier resetting of the grid plate being inspected. Under the action of the clamping assembly, each transmission plate limits and fixes the position of each grid plate, ensuring that each grid plate completely blocks the mounting groove. This provides better protection for the moving and stationary contacts installed in the mounting groove, thus ensuring the safety of the workers. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 This is a schematic diagram of the present invention;

[0025] Figure 2 for Figure 1 Enlarged diagram of A in the middle;

[0026] Figure 3 This is a schematic diagram of a partial explosion of the present invention. Figure 1 ;

[0027] Figure 4 This is a schematic diagram of a partial explosion of the present invention. Figure 2 ;

[0028] Figure 5 This is a schematic diagram of a partial explosion of the present invention. Figure 3 ;

[0029] Figure 6 for Figure 5 Enlarged diagram of B in the middle;

[0030] Figure 7 This is a schematic diagram of a partial explosion of the present invention. Figure 4 ;

[0031] Figure 8 This is a partial enlarged cross-sectional view of the present invention.

[0032] In the diagram: 11. Circuit breaker body; 111. Mounting slot; 12. Moving and stationary contacts; 13. First housing; 14. Second housing; 141. Guide slot; 21. Support base; 22. Reset column; 221. Reset spring; 23. Transmission plate; 231. Guide column; 232. Transmission slot; 233. Traction column; 234. Anti-slip block; 24. Grid plate; 25. Connecting plate; 31. Snap-fit ​​column; 32. Snap-fit ​​block; 321. Inclined slot; 322. Positioning slot; 33. Linkage plate; 34. Linkage column; 35. First support plate; 36. Second support plate; 37. Limiting plate; 38. Positioning spring; 41. Adjusting plate; 42. Adjusting sleeve; 43. Adjusting screw; 44. Protective plate; 51. Receiving block; 511. Clamping spring; 52. Clamping block; 53. Limiting frame. Detailed Implementation

[0033] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0034] Example

[0035] like Figures 1-8 As shown, this embodiment proposes a sealing device for a molded case circuit breaker, including a circuit breaker body 11, mounting grooves 111 formed on both sides of the circuit breaker body 11, and moving and stationary contacts 12, with the moving and stationary contacts 12 respectively fixedly connected to the mounting grooves 111 on both sides of the circuit breaker body 11.

[0036] The circuit breaker body 11 includes a first housing 13 and a second housing 14. The first housing 13 and the second housing 14 are fixedly connected. The upper side of the second housing 14 is fixedly connected to a support base 21. The support base 21 is fixedly connected to a plurality of reset posts 22. Each reset post 22 is slidably connected to a transmission plate 23. The lower end of each transmission plate 23 is fixedly connected to a grid baffle 24. The width of each grid baffle 24 is greater than the width of the mounting groove 111.

[0037] Under the action of the clamping assembly, each transmission plate 23 limits and fixes the position of each baffle 24, so that each baffle 24 can completely block the mounting groove 111, and the baffle 24 can provide better protection for the moving and stationary contacts 12 installed in the mounting groove 111.

[0038] Two guide grooves 141 are opened on both sides of the second housing 14. The end of each transmission plate 23 facing the second housing 14 is fixedly connected to the guide post 231. Each guide post 231 abuts against the inner wall of each guide groove 141.

[0039] When the worker pulls the transmission plate 23 upward, the transmission plate 23 can move away from the support seat 21 through the abutment action between the guide post 231 and the inner wall of the guide groove 141. Finally, the support seat 21 stops after moving a distance exceeding its own thickness. At this time, when the transmission plate 23 is flipped, it will not interfere with other transmission plates 23 around it, thus ensuring the use of the transmission plate 23.

[0040] A clamping assembly for limiting and clamping several transmission plates 23 is connected to the side of each transmission plate 23 facing the second housing 14.

[0041] By using the clamping assembly, the grid plates 24 on the same side can be simultaneously restricted, so that when the worker repairs a single grid plate 24, it will not affect the other grid plates 24. In addition, the limiting function of the grid plate 24 will also make it easier to reset the grid plate 24 being repaired. That is, it is convenient for the worker to quickly reset and clamp the grid plate 24 after maintenance.

[0042] like Figures 1-2 and Figures 4-7 As shown, the clamping assembly includes several locking pins 31, each locking pin 31 being fixedly connected to the side of the transmission plate 23 facing the second housing 14.

[0043] One side of each snap-fit ​​post 31 abuts against each snap-fit ​​block 32, the lower end of each snap-fit ​​block 32 is fixedly connected to the linkage plate 33, the linkage plate 33 is slidably connected to the linkage post 34, the first support plate 35 and the second support plate 36 are respectively fixedly connected to both ends of the linkage post 34, and both the first support plate 35 and the second support plate 36 are fixedly connected to the support base 21.

[0044] The limiting plate 37 is fixedly connected between the first support plate 35 and the second support plate 36. The locking spring 38 is sleeved on the linkage column 34, and the two ends of the locking spring 38 abut against the linkage plate 33 and the limiting plate 37 respectively.

[0045] Since the limiting plate 37 is fixed, the release of the locking spring 38 will cause the linkage plate 33 to move to one side, thereby driving the several locking blocks 32 fixedly connected to the linkage plate 33 to move. This allows several baffles 24 on one side to simultaneously block the connection position of the moving and stationary contacts 12. When a single baffle 24 is flipped, it will not affect the limiting function of other baffles 24. In addition, it has the limiting function of other baffles 24, and it also makes it convenient for a single baffle 24 to be quickly reset and locked after maintenance.

[0046] like Figures 5-7As shown, the inclined groove 321 is formed on the side of the snap-fit ​​block 32 facing the snap-fit ​​post 31, and the inclined groove 321 abuts against the snap-fit ​​post 31. The positioning groove 322 is formed on the side of the snap-fit ​​block 32 away from the inclined groove 321, and the inner diameter of the positioning groove 322 is the same as the outer diameter of the snap-fit ​​post 31.

[0047] When the locking block 32 moves toward the locking post 31, the locking block 32 can limit the locking post 31. Then, the transmission plate 23 connected to the locking post 31 will be rotated around the reset post 22 toward the limiting frame 53 under this force. With the limiting frame 53 limiting the transmission plate 23, the position of the transmission plate 23 is completely fixed. Under the action of the inclined groove 321, the locking post 31 will slide downward with the inclined groove 321. The lower position of the transmission plate 23 is fixed, thus further ensuring the limiting effect of the transmission plate 23.

[0048] like Figures 5-7 As shown, the lower side of the linkage plate 33 near the first support plate 35 is fixedly connected to the adjustment plate 41. An adjustment sleeve 42 is fixedly connected to the adjustment plate 41. The adjustment sleeve 42 is threadedly connected to the adjustment screw 43. The adjustment screw 43 is rotatably connected to the protective plate 44. The protective plate 44 is fixedly connected to the support base 21.

[0049] The worker can adjust the compression of the locking spring 38 by rotating the adjusting screw 43, thereby adjusting the adjusting sleeve 42, which is threaded to the adjusting screw 43, to move along the axial direction. This adjusts the spring force of the locking spring 38, so that the locking spring 38 can still be used even after the spring force gradually decreases after long-term use.

[0050] like Figures 1-3 As shown, each reset spring 221 is sleeved on each reset post 22, and the two ends of each reset spring 221 abut against the reset post 22 and the transmission plate 23 respectively.

[0051] When the spring force of the return spring 221 is released, it can always press the transmission plate 23 towards the support seat 21, so that the guide post 231 always abuts against the side of the second housing 14. Secondly, when there is no external force, the spring force can also limit the rotation angle of the transmission plate 23 around the locking post 31, improve the stability of the transmission plate 23, and thus improve the blocking effect of the baffle plate 24 on the position of the moving and stationary contacts 12.

[0052] like Figures 1-4 As shown, one side of each transmission plate 23 is fixedly connected to each receiving block 51, and the side of each receiving block 51 away from the transmission plate 23 is slidably connected to each clamping block 52. The clamping spring 511 is connected between the clamping block 52 and the receiving block 51.

[0053] One side of the receiving block 51 is slidably connected to the limiting frame 53, and the limiting frame 53 is fixedly connected to the support base 21;

[0054] When the transmission plate 23 is lowered, it is clamped in the limiting frame 53 by the clamping block 52, which is used to further limit the position of the transmission plate 23. When the clamping spring 511 prevents the transmission plate 23 from moving upward, the transmission plate 23 can be stably clamped in the limiting frame 53, and the clamping spring 511 allows the clamping block 52 to slide better along the inner wall of the limiting frame 53.

[0055] like Figures 2-4 As shown, the transmission groove 232 is formed on the transmission plate 23;

[0056] The transmission plate 23 can move upward through the transmission groove 232 along the abutment action of the reset post 22, limiting the sliding distance of the transmission plate 23, and causing the transmission plate 23 to rotate around the reset post 22, with each reset post 22 abutting against the inner wall of the transmission groove 232.

[0057] like Figures 2-4 and Figure 8 As shown, each traction column 233 is fixedly connected to each transmission plate 23, and each anti-slip block 234 is fixedly connected to the lower side of each traction column 233.

[0058] The traction column 233 is used to facilitate the movement of the transmission plate 23 by workers or users. The anti-slip block 234 is used to allow the transmission plate 23 to slide, so that workers can grasp the transmission plate 23 by the friction between their fingers and the anti-slip block 234, which further facilitates the movement of the transmission plate 23 by workers.

[0059] like Figure 3 As shown, each connecting plate 25 is fixedly connected to two support bases 21 on the same side;

[0060] The fixing effect of the two connecting plates 25 ensures that when one side of the support seat 21 is subjected to force, it will be partially offset by the other side of the support seat 21, thereby strengthening the connection between the two sides of the support seat 21 and the top of the second housing 14.

[0061] The principle of this embodiment is as follows:

[0062] When it is necessary to inspect and maintain the moving and stationary contacts 12 at a single location, the baffle plate 24 on that side must be flipped.

[0063] Workers can grip the transmission plate 23 using the traction column 233 or the anti-slip block 234. First, the transmission plate 23 is moved straight upwards, causing the receiving block 51 to slide along the inner wall of the limiting frame 53, ultimately disengaging the locking block 52 completely from the limiting frame 53. Then, the transmission plate 23 is rotated at a certain angle, ensuring that its upward movement does not interfere with the limiting frame 53. The transmission plate 23 is then moved upwards again, causing the guide column 231 to slide along the inner wall of the guide groove 141, driving the transmission plate 23 away from the support seat 21. Ultimately, the sliding distance of the transmission plate 23 exceeds its own thickness. During this upward movement, the locking column 31 carries the locking block 32. The plate moves towards the first support plate 35, eventually separating the locking pin 31 from the locking block 32 on that side. Under the release of the spring force of the return spring 221, the transmission plate 23 is constantly pressed towards the support seat 21, so that the guide pin 231 always abuts against the side of the second housing 14. Secondly, when there is no external force, the spring force can also limit the rotation angle of the transmission plate 23 around the locking pin 31, improving the stability of the transmission plate 23. It can also lock the locking pin 31 into the locking groove 322, further ensuring the stability of the transmission plate 23. Under the release of the spring force of the locking spring 38, the other transmission plates 23 will be locked and limited.

[0064] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sealing device for a molded case circuit breaker, comprising a circuit breaker body (11), mounting grooves (111) formed on both sides of the circuit breaker body (11), and moving and stationary contacts (12), wherein the moving and stationary contacts (12) are respectively fixedly connected to the mounting grooves (111) on both sides of the circuit breaker body (11). Its characteristics are: The circuit breaker body (11) includes a first housing (13) and a second housing (14). The first housing (13) and the second housing (14) are fixedly connected. A support base (21) is fixedly connected to the upper side of the second housing (14). A plurality of reset posts (22) are fixedly connected to the support base (21). A transmission plate (23) is slidably connected to each reset post (22). A baffle plate (24) is fixedly connected to the lower end of each transmission plate (23). The width of each baffle plate (24) is greater than the width of the mounting groove (111). The second housing (14) has guide grooves (141) on both sides. Each transmission plate (23) is fixedly connected to a guide post (231) at one end facing the second housing (14). Each guide post (231) abuts against the inner wall of each guide groove (141). Each transmission plate (23) is connected to a clamping assembly on the side facing the second housing (14) for limiting and clamping several transmission plates (23).

2. The sealing device for a molded case circuit breaker according to claim 1, characterized in that, The clamping assembly includes a plurality of locking pins (31), each of which is fixedly connected to the side of the transmission plate (23) facing the second housing (14); Each of the snap-fit ​​posts (31) has a snap-fit ​​block (32) abutting on one side. Each of the snap-fit ​​blocks (32) has a linkage plate (33) fixedly connected to its lower end. A linkage post (34) is slidably connected to the linkage plate (33). A first support plate (35) and a second support plate (36) are fixedly connected to both ends of the linkage post (34). The first support plate (35) and the second support plate (36) are both fixedly connected to the support base (21). A limiting plate (37) is fixedly connected between the first support plate (35) and the second support plate (36). A locking spring (38) is sleeved on the linkage column (34), and the two ends of the locking spring (38) abut against the linkage plate (33) and the limiting plate (37) respectively.

3. The sealing device for a molded case circuit breaker according to claim 2, characterized in that, The snap-fit ​​block (32) has an inclined groove (321) facing the snap-fit ​​post (31), the inclined groove (321) abuts against the snap-fit ​​post (31), and a snap-fit ​​groove (322) is provided on the side of the snap-fit ​​block (321) away from the inclined groove (321), the inner diameter of the snap-fit ​​groove (322) is the same as the outer diameter of the snap-fit ​​post (31).

4. The sealing device for a molded case circuit breaker according to claim 2, characterized in that, An adjusting plate (41) is fixedly connected to the lower side of one end of the linkage plate (33) near the first support plate (35). An adjusting sleeve (42) is fixedly connected to the adjusting plate (41). An adjusting screw (43) is threaded onto the adjusting sleeve (42). A protective plate (44) is rotatably connected to the adjusting screw (43). The protective plate (44) is fixedly connected to the support base (21).

5. The sealing device for a molded case circuit breaker according to claim 1, characterized in that, Each of the reset posts (22) is fitted with a reset spring (221), and the two ends of each reset spring (221) abut against the reset post (22) and the transmission plate (23) respectively.

6. The sealing device for a molded case circuit breaker according to claim 1, characterized in that, Each of the transmission plates (23) is fixedly connected to one side of a receiving block (51), and each of the receiving blocks (51) is slidably connected to a clamping block (52) on the side away from the transmission plate (23). A clamping spring (511) is connected between the clamping block (52) and the receiving block (51). The receiving block (51) is slidably connected to a limiting frame (53) on one side, and the limiting frame (53) is fixedly connected to the support base (21).

7. The sealing device for a molded case circuit breaker according to claim 1, characterized in that, Each of the transmission plates (23) is provided with a transmission groove (232), and each of the reset posts (22) abuts against the inner wall of the transmission groove (232).

8. The sealing device for a molded case circuit breaker according to claim 1, characterized in that, Each of the transmission plates (23) is fixedly connected to a traction column (233), and each of the traction columns (233) is fixedly connected to an anti-slip block (234) on its lower side.

9. The sealing device for a molded case circuit breaker according to claim 1, characterized in that, Connecting plates (25) are fixedly connected to the two support bases (21).

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