Plastic shell type circuit breaker with dustproof assembly

Abstract

The utility model belongs to the technical field of circuit breakers, and particularly relates to a plastic shell type circuit breaker with a dustproof assembly. Comprising an outer shell, an arc-extinguishing device and a dustproof assembly installed on the arc-extinguishing device, the dustproof assembly comprises a first dustproof net, the first dustproof net is of a corrugated structure and comprises a plurality of protruding parts arranged in an arrayed mode, and a first anti-blocking opening is formed between every two adjacent protruding parts; the second dustproof net is of a corrugated structure, the second dustproof net comprises a plurality of sunken parts which are arranged in an arrayed mode, and a second anti-blocking opening is formed between every two adjacent sunken parts; the second anti-blocking opening is right opposite to the protruding part; the first dustproof net and the second dustproof net are both of a corrugated structure, the heat dissipation effect of the circuit breaker can be improved, when the first dustproof net is blocked due to accumulation of too much dust, high-temperature gas can be dissipated out along the first anti-blocking opening, the heat dissipation channel and the second anti-blocking opening in sequence, and the service cycle of the dustproof assembly is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and in particular relates to a plastic shell type circuit breaker with a dustproof component. Background Art

[0002] A circuit breaker is a device used to open and close an electrical circuit. This includes molded case circuit breakers, also known as device-type circuit breakers. All components are sealed in a plastic casing, resulting in a very compact and small structure. They are typically operated manually, with motorized opening and closing options available for larger circuit breakers. To dissipate heat, circuit breakers are equipped with a heat sink with several holes. Because circuit breakers are often used in dusty environments, particularly in factories, this dust can enter the circuit breaker through the heat sink, potentially affecting the circuit breaker's heat dissipation and even the electrical conductivity of internal components. Therefore, dust protection components are required on circuit breakers.

[0003] In the prior art, the dustproof component is usually a dustproof mesh. After a period of time, a large amount of dust will accumulate on the dustproof mesh, causing the dustproof mesh to be blocked, affecting the heat dissipation effect of the circuit breaker. Therefore, the service life is short and it needs to be replaced and cleaned frequently. Utility Model Content

[0004] The purpose of the present utility model is to address the above-mentioned technical problems and provide a plastic cased circuit breaker with a dustproof assembly. By providing a first dustproof net and a second dustproof net with a corrugated structure, the heat dissipation effect of the circuit breaker can be improved. A heat dissipation channel is formed between the first dustproof net and the second dustproof net. When the first dustproof net is blocked due to excessive accumulation of dust, high-temperature gas can be emitted along the first anti-blocking opening, the heat dissipation channel, and the second anti-blocking opening in sequence, thereby extending the service life of the dustproof assembly and avoiding the influence of the heat dissipation effect due to the blockage of the first dustproof net.

[0005] In view of this, the present invention provides a plastic case circuit breaker with a dustproof assembly, comprising an outer shell, an arc extinguishing device installed in the outer shell, and a dustproof assembly installed on the arc extinguishing device, wherein the dustproof assembly comprises:

[0006] The first dustproof screen has a corrugated structure and includes a plurality of raised portions arranged in an array, with a first anti-blocking opening being provided between two adjacent raised portions;

[0007] The second dustproof net has a corrugated structure and includes a plurality of recessed portions arranged in an array, with a second anti-blocking opening being provided between two adjacent recessed portions;

[0008] Particularly, the second anti-blocking opening is opposite to the raised portion, the arc extinguishing device includes an arc extinguishing cover and an arc extinguishing plate assembly arranged in the arc extinguishing cover, the arc extinguishing cover is provided with a first heat dissipation window, the first heat dissipation window is provided with a heat dissipation baffle, the heat dissipation baffle is provided with a plurality of heat dissipation holes, the outer shell is provided with a second heat dissipation window opposite to the first heat dissipation window, the first dustproof net and the second dustproof net are both provided on the first heat dissipation window, and the second dustproof net is located between the heat dissipation baffle and the first dustproof net, a heat dissipation channel is formed between the first dustproof net and the second dustproof net, and the first anti-blocking opening, the heat dissipation channel and the second anti-blocking opening are connected in sequence.

[0009] In the above solution, further, the dustproof component also includes:

[0010] A mounting seat, wherein a limiting groove is provided on the mounting seat;

[0011] The frame is arranged in the limiting groove;

[0012] Wherein, the first dustproof net and the second dustproof net are both arranged on the frame, the mounting seat is arranged on the first heat dissipation window, and the mounting seat passes through the second heat dissipation window.

[0013] In the above solution, further, the dustproof component also includes:

[0014] A limiting cover is hinged on the mounting base, and a third heat dissipation window is provided on the limiting cover;

[0015] The quick-release structure is provided between the limit cover and the mounting seat;

[0016] Wherein, the frame is arranged between the mounting seat and the limiting cover.

[0017] In the above solution, further, the quick-release structure includes:

[0018] A buckle is provided on the limit cover;

[0019] Wherein, a snap-fit groove is provided on the mounting seat, and the snap-fit is snap-fitted into the snap-fit groove.

[0020] In the above solution, further, an avoidance gap is opened on the periphery of the frame, and an anti-slip protrusion is provided on the avoidance gap.

[0021] In the above solution, further, the arc extinguishing hood includes:

[0022] Two cover bodies, the two cover bodies are opposite to each other, the cover bodies are provided with plug-in slots, and a receiving slot is formed between the two plug-in slots;

[0023] Wherein, the heat dissipation baffle is arranged in the accommodating groove.

[0024] The beneficial effects of the utility model are:

[0025] 1. Both the first and second dust screens have a corrugated structure, which can improve the heat dissipation effect of the circuit breaker. A heat dissipation channel is formed between the first and second dust screens. When the first dust screen becomes clogged due to excessive dust accumulation, high-temperature gas can be discharged through the first anti-blocking opening, the heat dissipation channel, and the second anti-blocking opening in sequence, thereby extending the service life of the dust screen assembly and preventing the heat dissipation effect from being affected by the blockage of the first dust screen.

[0026] 2. By arranging the first dustproof net and the second dustproof net on the frame, arranging the frame between the mounting base and the limit cover hinged on the mounting base, and fixing the limit cover through a quick-release structure, the steps of installing and removing the first dustproof net and the second dustproof net are reduced, making it easier to install and replace the first dustproof net and the second dustproof net. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0029] Figure 3 This is a schematic diagram of the overall structure of the arc extinguishing device of the present utility model;

[0030] Figure 4 This is a schematic diagram of the explosion structure of the arc extinguishing device of the utility model;

[0031] Figure 5 This is a schematic cross-sectional view of the arc extinguishing device of the present invention;

[0032] Figure 6 This utility model Figure 5 Schematic diagram of the structure at A;

[0033] Figure 7 It is a structural schematic diagram of the anti-slip convex part of the utility model.

[0034] The marks in the figure are:

[0035] 1. Arc extinguishing device; 11. Arc extinguishing cover; 111. Cover body; 2. Dustproof assembly; 21. First dustproof net; 211. Raised portion; 22. Second dustproof net; 221. Recessed portion; 23. Mounting seat; 24. Frame; 25. Limiting cover; 26. Quick-release structure; 261. Buckle; 3. First anti-blocking opening; 4. Second anti-blocking opening; 5. First heat dissipation window; 6. Heat dissipation baffle; 7. Heat dissipation hole; 8. Second heat dissipation window; 9. Heat dissipation channel; 10. Limiting groove; 12. Third heat dissipation window; 13. Snap-in groove; 14. Avoidance gap; 15. Anti-slip protrusion; 16. Plug-in slot. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0037] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0038] Example 1:

[0039] This embodiment provides a plastic case circuit breaker with a dustproof assembly, comprising an outer shell, an arc extinguishing device 1 installed in the outer shell, and a dustproof assembly 2 installed on the arc extinguishing device 1. The dustproof assembly 2 includes:

[0040] The first dustproof net 21 has a corrugated structure and includes a plurality of raised portions 211 arranged in an array, with a first anti-blocking opening 3 provided between two adjacent raised portions 211;

[0041] The second dustproof net 22 has a corrugated structure and includes a plurality of recessed portions 221 arranged in an array, with a second anti-blocking opening 4 being provided between two adjacent recessed portions 221;

[0042] Among them, the second anti-blocking opening 4 is opposite to the raised portion 211, the arc extinguishing device 1 includes an arc extinguishing cover 11 and an arc extinguishing plate assembly arranged in the arc extinguishing cover 11, the arc extinguishing cover 11 is provided with a first heat dissipation window 5, the first heat dissipation window 5 is provided with a heat dissipation baffle 6, the heat dissipation baffle 6 is provided with a plurality of heat dissipation holes 7, the outer shell is provided with a second heat dissipation window 8 opposite to the first heat dissipation window 5, the first dustproof net 21 and the second dustproof net 22 are both provided on the first heat dissipation window 5, and the second dustproof net 22 is located between the heat dissipation baffle 6 and the first dustproof net 21, a heat dissipation channel 9 is formed between the first dustproof net 21 and the second dustproof net 22, and the first anti-blocking opening 3, the heat dissipation channel 9 and the second anti-blocking opening 4 are connected in sequence.

[0043] In this technical solution, the plastic case circuit breaker includes not only the arc extinguishing device 1 but also an operating device and a contact device, etc. The arc extinguishing device 1 is used to extinguish the arc generated when the circuit is disconnected.

[0044] The first heat dissipation window 5 can be opened at the top of the arc extinguishing cover 11, and the heat dissipation baffle 6 is installed on the first heat dissipation window 5. The high-temperature gas generated by the arc extinguishing device 1 can escape from the several heat dissipation holes 7 on the heat dissipation baffle 6, thereby playing a role in cooling the circuit breaker.

[0045] The heat dissipation baffle 6 is made of insulating and high-temperature resistant material, which can prevent electric shock and at the same time withstand the high temperature generated by the arc, thereby improving the safety performance of the circuit breaker.

[0046] The first dust-proof net 21 can be a metal filter net with several filter holes, which can filter floating objects such as dust in the air to prevent dust from entering the arc-extinguishing chamber in the arc-extinguishing cover 11 along the heat dissipation holes 7 on the heat dissipation partition 6. At the same time, the high-temperature gas in the arc-extinguishing device 1 can be dissipated from the first dust-proof net 21.

[0047] The first dustproof net 21 has a corrugated structure, which can increase the filtering area, thereby increasing the number of filtering holes, thereby increasing the dissipation speed of high-temperature gas and improving the heat dissipation effect of the circuit breaker.

[0048] The second dust screen 22 can also be a metal filter with several filter holes, which further filters dust and other floating objects in the air filtered by the first dust screen 21, further improving the filtering effect. The second dust screen 22 has a corrugated structure, which can further improve the heat dissipation effect of the circuit breaker.

[0049] Since the first dustproof net 21 has a corrugated structure, a plurality of raised portions 211 are formed in an array. The cross section of the raised portion 211 may be V-shaped, and a first anti-blocking opening 3 is provided between two adjacent raised portions 211 .

[0050] The second dustproof net 22 has a corrugated structure, thereby forming a plurality of arranged recessed portions 221. The cross-section of the recessed portions 221 can be V-shaped, and a second anti-blocking opening 4 is provided between two adjacent recessed portions 221. A heat dissipation channel 9 is formed between the first dustproof net 21 and the second dustproof net 22.

[0051] The second anti-blocking opening 4 is directly opposite to the raised portion 211 , and can prevent dust from entering the arc extinguishing cover 11 along the first anti-blocking opening 3 .

[0052] When the first dustproof net 21 is clogged due to excessive accumulation of dust, the high-temperature gas can be emitted along the first anti-blocking opening 3, the heat dissipation channel 9 and the second anti-blocking opening 4 in sequence, thereby extending the service life of the dustproof component 2 and avoiding the influence of the heat dissipation effect due to the blockage of the first dustproof net 21.

[0053] Example 2:

[0054] This embodiment provides a molded case circuit breaker with a dustproof assembly. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0055] The dustproof component 2 also includes:

[0056] A mounting seat 23, on which a limiting groove 10 is provided;

[0057] The frame 24 is disposed in the limiting groove 10;

[0058] The first dustproof net 21 and the second dustproof net 22 are both arranged on the frame 24 , the mounting seat 23 is arranged on the first heat dissipation window 5 , and the mounting seat 23 passes through the second heat dissipation window 8 .

[0059] In this technical solution, by arranging both the first dustproof net 21 and the second dustproof net 22 on the frame 24 , the steps of installation and disassembly are reduced, and replacement of the first dustproof net 21 and the second dustproof net 22 is facilitated.

[0060] The mounting base 23 and the arc extinguishing cover 11 can be integrally formed. The mounting base 23 is provided with a limiting groove 10 for limiting the frame 24 to prevent the frame 24 from moving in the horizontal direction and facilitate fixing the frame 24.

[0061] The frame 24 and the mounting seat 23 can be connected by using fastening screws, and the frame 24 can also be snapped onto the mounting seat 23.

[0062] Furthermore, the dustproof component 2 also includes:

[0063] The limiting cover 25 is hinged on the mounting base 23 and is provided with a third heat dissipation window 12;

[0064] The quick-release structure 26 is provided between the limiting cover 25 and the mounting seat 23;

[0065] The frame 24 is disposed between the mounting seat 23 and the limiting cover 25 .

[0066] In this technical solution, after the frame 24 is placed in the limiting groove 10, the frame 24 is further limited by the limiting cover 25 hinged on the mounting seat 23 to prevent the frame 24 from moving in the vertical direction.

[0067] The quick-release structure 26 is used to fix the limiting cover 25 on the mounting seat 23. The quick-release structure 26 can be a screw. The limiting cover 25 is fixed to the mounting seat 23 by using the screw. The quick-release structure 26 can also be a snap-on structure.

[0068] By providing the limiting cover 25 and the quick-release structure 26 , the steps of installing and disassembling the frame 24 can be further reduced, making it easier to replace the first dustproof net 21 and the second dustproof net 22 .

[0069] Furthermore, the quick-release structure 26 includes:

[0070] Buckle 261, provided on the limiting cover 25;

[0071] The mounting seat 23 is provided with a snap-fitting groove 13 , and the snap-fitting buckle 261 is snap-fitted into the snap-fitting groove 13 .

[0072] In this technical solution, the buckle 261 is a conventional buckle 261. When fixing the limit cover 25, the limit cover 25 can be fixed by engaging the buckle 261 in the snap-fit groove 13, which facilitates the quick installation and removal of the frame 24, and then facilitates the removal of the first dustproof net 21 and the second dustproof net 22.

[0073] Example 3:

[0074] This embodiment provides a molded case circuit breaker with a dustproof assembly. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0075] An escape notch 14 is formed on the periphery of the frame 24 , and an anti-slip protrusion 15 is provided on the escape notch 14 .

[0076] In this technical solution, the avoidance gap 14 can be set on a side close to the quick-release structure 26. The avoidance gap 14 is used to accommodate fingers or tools, and the anti-slip protrusion 15 is used to increase friction, thereby facilitating the removal of the frame 24.

[0077] Example 4:

[0078] This embodiment provides a molded case circuit breaker with a dustproof assembly. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0079] The arc extinguishing hood 11 includes:

[0080] Two covers 111, the two covers 111 are opposite to each other, the covers 111 are provided with a plug-in slot 16, and a receiving slot is formed between the two plug-in slots 16;

[0081] The heat dissipation baffle 6 is arranged in the accommodating groove.

[0082] In this technical solution, the two covers 111 are facing each other and can be connected to each other by screws. The insertion slots 16 on the two covers 111 are facing each other and connected to each other, forming a receiving slot, which does not require the use of screws when installing the heat dissipation baffle 6, thereby facilitating the installation and removal of the heat dissipation baffle 6.

[0083] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A plastic case circuit breaker with a dustproof component, characterized in that: The invention comprises an outer shell, an arc extinguishing device (1) installed in the outer shell, and a dustproof component (2) installed on the arc extinguishing device (1), wherein the dustproof component (2) comprises: The first dustproof net (21) has a corrugated structure and includes a plurality of raised portions (211) arranged in an array, with a first anti-blocking opening (3) provided between two adjacent raised portions (211); The second dustproof net (22) has a corrugated structure, and the second dustproof net (22) includes a plurality of recessed portions (221) arranged in an array, and a second anti-blocking opening (4) is provided between two adjacent recessed portions (221); The second anti-blocking opening (4) is opposite to the raised portion (211), the arc extinguishing device (1) comprises an arc extinguishing cover (11) and an arc extinguishing plate assembly arranged in the arc extinguishing cover (11), the arc extinguishing cover (11) is provided with a first heat dissipation window (5), the first heat dissipation window (5) is provided with a heat dissipation baffle (6), the heat dissipation baffle (6) is provided with a plurality of heat dissipation holes (7), the outer shell is provided with a second heat dissipation window (8) opposite to the first heat dissipation window (5), the first dustproof net (21) and the second dustproof net (22) are both provided on the first heat dissipation window (5), and the second dustproof net (22) is located between the heat dissipation baffle (6) and the first dustproof net (21), a heat dissipation channel (9) is formed between the first dustproof net (21) and the second dustproof net (22), and the first anti-blocking opening (3), the heat dissipation channel (9) and the second anti-blocking opening (4) are connected in sequence.

2. A plastic case circuit breaker with a dustproof assembly according to claim 1, characterized in that: The dustproof component (2) further comprises: A mounting seat (23), wherein a limiting groove (10) is provided on the mounting seat (23); A frame (24) is disposed in the limiting groove (10); The first dustproof net (21) and the second dustproof net (22) are both arranged on the frame (24), the mounting seat (23) is arranged on the first heat dissipation window (5), and the mounting seat (23) passes through the second heat dissipation window (8).

3. A plastic case circuit breaker with a dustproof assembly according to claim 2, characterized in that: The dustproof component (2) further comprises: A limiting cover (25) is hinged on the mounting seat (23), and a third heat dissipation window (12) is provided on the limiting cover (25); A quick-release structure (26) is provided between the limiting cover (25) and the mounting seat (23); Wherein, the frame (24) is arranged between the mounting seat (23) and the limiting cover (25).

4. A plastic case circuit breaker with a dustproof assembly according to claim 3, characterized in that: The quick-release structure (26) comprises: A buckle (261) is provided on the limiting cover (25); Wherein, a clamping groove (13) is provided on the mounting seat (23), and the buckle (261) is clamped in the clamping groove (13).

5. The plastic case circuit breaker with dustproof assembly according to claim 2, characterized in that: An avoidance notch (14) is provided on the peripheral edge of the frame (24), and an anti-slip convex portion (15) is provided on the avoidance notch (14).

6. The plastic case circuit breaker with dustproof assembly according to claim 1, characterized in that: The arc extinguishing hood (11) comprises: Two cover bodies (111), the two cover bodies (111) are facing each other, a plug-in slot (16) is provided on the cover body (111), and a receiving slot is formed between the two plug-in slots (16); Wherein, the heat dissipation baffle (6) is arranged in the accommodating groove.

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