Insulation enhancing structure of alternating-current high-voltage molded case circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, and particularly discloses an insulation enhancing structure of an alternating-current high-voltage molded case circuit breaker, which comprises a shell I and a shell II, an insulation enhancing inner wall I is fixedly arranged on the inner wall of the shell I, an insulation enhancing inner wall II is fixedly arranged on the inner wall of the shell II, and the shell I and the shell II are connected in an attached manner, the concave part I of the insulation reinforced inner wall I is in concave-convex connection with the convex part II of the insulation reinforced inner wall II, the convex part I of the insulation reinforced inner wall I is in concave-convex connection with the concave part III of the insulation reinforced inner wall II, and the concave part II of the insulation reinforced inner wall I is in concave-convex connection with the convex part III of the insulation reinforced inner wall II. According to the utility model, the two shells are provided with the insulation enhancing inner walls with the concave-convex parts, and the concave-convex connection is carried out, so that the insulation performance of the circuit breaker is enhanced, and the breakdown phenomenon is avoided; and insulation is enhanced by adding the insulating shaft sleeve, so that broken conductive carbon particles are prevented from entering staggered seams and damaging insulation.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to an insulation enhancement structure for an AC high-voltage molded case circuit breaker. Background Technology

[0002] In the design of AC high-voltage molded case circuit breakers, the insulation capacity of the product needs to be significantly enhanced due to the presence of voltage peaks. Because the mechanism is composed of conductive metal, breakdown can easily occur between poles via the mechanism. Therefore, the creepage distances between the shaft and the mechanism, and between the conductive circuit and the mechanism, need to be specially treated to cope with unprecedented voltage plateaus. Utility Model Content

[0003] The purpose of this invention is to solve the technical problems existing in the background art. To this end, an insulation enhancement structure for an AC high-voltage molded case circuit breaker is provided.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An insulation reinforcement structure for an AC high-voltage molded case circuit breaker includes a housing 1 and a housing 2. An insulation reinforcement inner wall 1 is fixedly provided on the inner wall of the housing 1, and an insulation reinforcement inner wall 2 is fixedly provided on the inner wall of the housing 2. The insulation reinforcement inner wall 1 includes a recess 1, a protrusion 1, and a recess 2, and the insulation reinforcement inner wall 2 includes a protrusion 2, a recess 3, and a protrusion 3.

[0006] The first housing and the second housing are fitted together, wherein the recessed portion one of the insulating reinforced inner wall one is connected to the protruding portion two of the insulating reinforced inner wall two in a concave-convex connection, the protruding portion one of the insulating reinforced inner wall one is connected to the recessed portion three of the insulating reinforced inner wall two in a convex-concave connection, and the recessed portion two of the insulating reinforced inner wall one is connected to the protruding portion three of the insulating reinforced inner wall two in a concave-convex connection.

[0007] The following is a further defined technical solution of this utility model: the housing one is divided into a contact system installation half-area, an operating system installation half-area, and a conductive circuit installation half-area by an insulating reinforced inner wall; the housing two is divided into a contact system installation half-area, an operating system installation half-area, and a conductive circuit installation half-area by an insulating reinforced inner wall.

[0008] After housing one and housing two are attached and connected, the first half of the contact system mounting area and the second half of the contact system mounting area are attached together to form the contact system mounting area, the first half of the operating system mounting area and the second half of the operating system mounting area are attached together to form the operating system mounting area, and the first half of the conductive circuit mounting area and the second half of the conductive circuit mounting area are attached together to form the conductive circuit mounting area.

[0009] The following is a further defined technical solution of this utility model: the first shell and the second shell are fitted together and locked by bolts and nuts.

[0010] The following is a further defined technical solution of this utility model: a bushing countersunk hole 1 is provided on the side of the housing 1 near the housing 2, and a bushing countersunk hole 2 is provided on the side of the housing 2 near the housing 1. The bolt passes through the housing 1, the bushing countersunk hole 1, the bushing countersunk hole 2, and the housing 2 to be threadedly connected to the nut.

[0011] The following is a further defined technical solution of this utility model: the bolt is fitted with an insulating bushing, half of the insulating bushing is located in the bushing countersunk hole one, and the other half of the insulating bushing is located in the bushing countersunk hole two.

[0012] Compared with the prior art, the present invention has the following technical effects:

[0013] This invention enhances the insulation performance of the circuit breaker by providing an insulating reinforced inner wall with concave and convex portions on the two housings and connecting them, thereby preventing breakdown. Furthermore, insulation is further enhanced by adding an insulating bushing to prevent broken conductive carbon particles from entering the interlacing seam and damaging the insulation.

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the shell of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the second shell in this utility model;

[0018] Figure 3 This is a schematic diagram of the main structure of this utility model after all systems are installed inside the housing.

[0019] Figure 4 This is a schematic diagram of the main structure of this utility model after all systems are installed inside the housing.

[0020] Figure 5 This is a schematic diagram of the main structure of this utility model after all systems are installed inside the housing.

[0021] Figure 6 This is a schematic diagram of the bolt points for the bolt and nut connection between shell 1 and shell 2 in this utility model;

[0022] Figure 7 This is a schematic diagram of the installation structure of the insulating bushing in this utility model;

[0023] Figure 8 This is a partial structural diagram of the present invention for installing other structures (such as a fixed shaft).

[0024] Reference numerals: 1. Housing 1; 2. Housing 2; 3. Insulation-reinforced inner wall 1; 301. Recess 1; 302. Protrusion 1; 303. Recess 2; 4. Insulation-reinforced inner wall 2; 401. Protrusion 2; 402. Recess 3; 403. Protrusion 3; 5. Bolt; 6. Nut; 7. Bushing countersunk hole 1; 8. Bushing countersunk hole 2; 9. Insulating bushing; 10. Contact system; 11. Operating system; 12. Conductive circuit; 13. Interlaced joint; 14. Fixed shaft. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0029] like Figure 1-7 As shown, this embodiment provides an insulation enhancement structure for an AC high-voltage molded case circuit breaker, which mainly consists of a housing 1, a housing 2, an insulation enhancement inner wall 3, an insulation enhancement inner wall 4, and an insulation bushing 9.

[0030] like Figure 1 and 3 As shown, an insulating reinforced inner wall 3 is fixedly provided on the inner wall of the housing 1. The insulating reinforced inner wall 3 includes a recess 301, a protrusion 302, and a second recess 303, wherein the first recess 301 and the second recess 303 are respectively distributed on both sides of the protrusion 302. The insulating reinforced inner wall 3 divides the inner cavity of the housing 1 into a contact system mounting half-area, an operating system mounting half-area, and a conductive circuit mounting half-area.

[0031] like Figure 2 and 4 As shown, an insulating reinforced inner wall 4 is fixedly provided on the inner wall of housing 2. The insulating reinforced inner wall 4 includes a protrusion 401, a recess 402, and a protrusion 403, wherein the protrusion 401 and the protrusion 403 are respectively distributed on both sides of the recess 402. The insulating reinforced inner wall 4 divides the inner cavity of housing 2 into a contact system mounting half-area, an operating system mounting half-area, and a conductive circuit mounting half-area through the insulating reinforced inner wall 4.

[0032] The housing 1 and the housing 2 are fitted together, wherein the recessed portion 301 of the insulating reinforced inner wall 3 is connected to the protruding portion 401 of the insulating reinforced inner wall 4, the protruding portion 302 of the insulating reinforced inner wall 3 is connected to the recessed portion 402 of the insulating reinforced inner wall 4, and the recessed portion 303 of the insulating reinforced inner wall 3 is connected to the protruding portion 403 of the insulating reinforced inner wall 4.

[0033] Therefore, as Figure 5As shown, after housing 1 and housing 2 are bonded together, contact system mounting half-area one and contact system mounting half-area two are bonded together to form a contact system mounting area, which is used to install contact system 10. Operating system mounting half-area one and operating system mounting half-area two are bonded together to form an operating system mounting area, which is used to install operating system 11. Conductive circuit mounting half-area one and conductive circuit mounting half-area two are bonded together to form a conductive circuit mounting area, which is used to install conductive circuit 12. Creepage insulation reinforcement treatment is performed between operating system 11, contact system 10, and conductive system through insulation reinforcement inner wall one 3 and insulation reinforcement inner wall two 4.

[0034] like Figure 6 and 7 As shown, housing 1 and housing 2 are fitted together and locked by bolts 5 and nuts 6 to ensure the airtightness of the internal cavity of the housing. Specifically, housing 1 has a bushing countersunk hole 7 on the side near housing 2, and housing 2 has a bushing countersunk hole 8 on the side near housing 1. Bolt 5 passes through housing 1, bushing countersunk hole 7, bushing countersunk hole 8, and housing 2 and is threadedly connected to nut 6. An insulating bushing 9 is fitted onto bolt 5, with one half of the insulating bushing 9 inside bushing countersunk hole 7 and the other half inside bushing countersunk hole 8. The insulating bushing 9 prevents broken conductive carbon particles from entering the interlaced joint 13 and damaging the insulation.

[0035] It should be noted that, as Figure 8 As shown, in other parts where it is necessary to pass through the shaft through holes in housing 1 and housing 2 (for example, where the fixed shaft 14 passes through housing 1 and housing 2), insulation can also be enhanced by adding insulating bushings 9.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the disclosed methods and techniques, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, all equivalent changes made based on the shape, structure, and principle of this utility model without departing from its technical solution should be covered within the protection scope of this utility model.

Claims

1. An insulation enhancement structure for an AC high-voltage molded case circuit breaker, characterized in that, The device includes a housing 1 (1) and a housing 2 (2). The inner wall of the housing 1 (1) is fixedly provided with an insulating reinforced inner wall 1 (3), and the inner wall of the housing 2 (2) is fixedly provided with an insulating reinforced inner wall 2 (4). The insulating reinforced inner wall 1 (3) includes a recess 1 (301), a protrusion 1 (302) and a recess 2 (303), and the insulating reinforced inner wall 2 (4) includes a protrusion 2 (401), a recess 3 (402) and a protrusion 3 (403). The first shell (1) and the second shell (2) are fitted together, wherein the first recess (301) of the first insulating reinforced inner wall (3) is connected to the second protrusion (401) of the second insulating reinforced inner wall (4), the first protrusion (302) of the first insulating reinforced inner wall (3) is connected to the third recess (402) of the second insulating reinforced inner wall (4), and the second recess (303) of the first insulating reinforced inner wall (3) is connected to the third protrusion (403) of the second insulating reinforced inner wall (4).

2. The insulation enhancement structure of an AC high-voltage molded case circuit breaker as described in claim 1, characterized in that, The housing one (1) is divided into a contact system installation half-area one, an operating system installation half-area one and a conductive circuit installation half-area one by an insulating reinforced inner wall one (3). The housing two (2) is divided into a contact system installation half-area two, an operating system installation half-area two and an operating system installation half-area two by an insulating reinforced inner wall two (4). After the housing one (1) and housing two (2) are attached and connected, the first half of the contact system installation area and the second half of the contact system installation area are attached together to form the contact system installation area, the first half of the operating system installation area and the second half of the operating system installation area are attached together to form the operating system installation area, and the first half of the conductive circuit installation area and the second half of the operating system installation area are attached together to form the conductive circuit installation area.

3. The insulation enhancement structure of an AC high-voltage molded case circuit breaker as described in claim 1, characterized in that, The first shell (1) and the second shell (2) are fitted together and locked by bolts (5) and nuts (6).

4. The insulation enhancement structure of an AC high-voltage molded case circuit breaker as described in claim 3, characterized in that, The housing 1 (1) has a bushing countersunk hole 1 (7) on the side near the housing 2 (2), and the housing 2 (2) has a bushing countersunk hole 2 (8) on the side near the housing 1 (1). The bolt (5) passes through the housing 1 (1), bushing countersunk hole 1 (7), bushing countersunk hole 2 (8) and housing 2 (2) and is threaded to the nut (6).

5. The insulation enhancement structure of an AC high-voltage molded case circuit breaker as described in claim 3, characterized in that, The bolt (5) is fitted with an insulating bushing (9), half of which is located in the bushing countersunk hole one (7), and the other half of which is located in the bushing countersunk hole two (8).

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