Circuit breaker shielding case structure

Abstract

The utility model discloses a circuit breaker shielding case structure, and relates to the technical field of circuit breaker shielding cases, the circuit breaker shielding case structure comprises a top plate, the bottom of the top plate is equidistantly and annularly provided with four slide grooves, the bottom of the top plate is slidably provided with slide blocks through the four slide grooves, and the bottoms of the four slide blocks are fixedly connected with a housing. A connecting mechanism is arranged at the bottom center point of the top plate. According to the utility model, through the arrangement of the connecting mechanism, the positions among the four shells can be changed, so that the size of the shielding cover is changed, adjustment can be conveniently carried out according to the size of a circuit breaker, the adaptability is improved, the shells realize high-performance electromagnetic protection through diversified characteristic combination, and efficient blocking, durability and practicability are considered.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically a circuit breaker shielding structure. Background Technology

[0002] Circuit breakers are named for their high-vacuum arc-extinguishing medium and the insulating medium between the contacts after arc extinguishing. They are characterized by their small size, light weight, suitability for frequent operation, and maintenance-free arc extinguishing, making them widely used in power distribution networks. Circuit breakers typically require an external shielding enclosure to extend their service life.

[0003] Most existing shielding covers are one-piece designs and cannot be adjusted for different sizes of circuit breakers, resulting in poor adaptability. Making different shielding covers for different sizes of circuit breakers would increase costs. Utility Model Content

[0004] The purpose of this utility model is to provide a circuit breaker shielding structure to solve the problem that most shielding covers in the background art are one-piece and cannot be adjusted according to different sizes of circuit breakers.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A circuit breaker shield structure includes a top plate, four sliding grooves are equidistantly arranged in a ring at the bottom of the top plate, and sliders are slidably installed on the bottom of the top plate through the four sliding grooves. The bottom of each of the four sliders is fixedly connected to a housing.

[0007] A connecting mechanism is provided at the bottom center point of the top plate.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative embodiment: the connecting mechanism includes a rotating component, which is rotatably mounted at the bottom center point of the top plate, and four connecting rods are equidistantly and rotatably mounted on the bottom of the rotating component, with the four connecting rods respectively rotatably mounted to four sliders.

[0010] In one alternative: the top of the rotating component passes through the top plate and is connected to a knob.

[0011] In one alternative: each of the four housings has a limiting groove on one side, and each of the four housings has a limiting block fixedly connected to the other side, with the limiting block and the limiting groove being compatible.

[0012] In one alternative: the exterior of each of the four housings is threaded with a first bolt.

[0013] In one alternative: the bottom of each of the four housings is fixedly connected to a fixing plate, and the top of each of the four fixing plates is penetrated by a second bolt.

[0014] In one alternative: the housing includes a conductive layer, an insulating layer is attached to one side of the conductive layer, a protective layer is attached to one side of the insulating layer, and an anti-corrosion layer is attached to one side of the protective layer.

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

[0016] 1. By setting up a connecting mechanism, this utility model can change the position between the four housings, thereby changing the size of the shielding cover, which is convenient to adjust according to the size of the circuit breaker and improves adaptability.

[0017] 2. The housing of this utility model achieves high-performance electromagnetic protection through a variety of characteristic combinations, taking into account the characteristics of high efficiency, durability and practicality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the limiting groove of this utility model.

[0020] Figure 3 This is a schematic diagram of the connection mechanism of this utility model.

[0021] Figure 4 This is a cross-sectional view of the shell structure of this utility model.

[0022] Figure reference numerals: 1. Top plate; 2. Slide groove; 3. Slider; 4. Housing; 41. Conductive layer; 42. Insulating layer; 43. Protective layer; 44. Anti-corrosion layer; 5. Connecting mechanism; 51. Rotating component; 52. Connecting rod; 6. Knob; 7. Limiting groove; 8. Limiting block; 9. First bolt; 10. Fixing plate; 11. Second bolt. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] In one embodiment, such as Figures 1-4 As shown, a circuit breaker shield structure includes a top plate 1, and four sliding grooves 2 are equidistantly arranged in a ring at the bottom of the top plate 1. Sliding sliders 3 are slidably installed in the sliding grooves 2, and the bottoms of the sliding sliders 3 are all fixedly connected to the housing 4.

[0025] A connecting mechanism 5 is provided at the bottom center point of the top plate 1.

[0026] In this embodiment, the position between the four housings 4 can be changed by setting the connecting mechanism 5, thereby changing the size of the shielding cover, which is convenient to adjust according to the size of the circuit breaker and improves adaptability.

[0027] In one embodiment, such as Figure 2 and Figure 3 As shown, the connecting mechanism 5 includes a rotating component 51, which is rotatably mounted at the bottom center point of the top plate 1. Four connecting rods 52 are equidistantly and rotatably mounted on the bottom of the rotating component 51. The four connecting rods 52 are rotatably mounted to four sliders 3 respectively. The top of the rotating component 51 passes through the top plate 1 and is connected to a knob 6. When it is necessary to change the size of the shielding cover, the first bolt 9 on the outside of the housing 4 is loosened, and then the knob 6 is rotated. The knob 6 drives the rotating component 51 to rotate. Due to the setting of the connecting rods 52, the sliders 3 slide inside the slide groove 2, thereby changing the position between the four housings 4. After the adjustment is completed, the first bolt 9 is tightened, which effectively adjusts according to the size of the circuit breaker and improves the adaptability.

[0028] In one embodiment, such as Figure 2 As shown, each of the four housings 4 has a limiting groove 7 on one side, and a limiting block 8 is fixedly connected to the other side of each of the four housings 4. The limiting block 8 and the limiting groove 7 are compatible. During the adjustment process, the limiting block 8 slides inside the limiting groove 7, which plays a limiting role and improves stability. By tightening the first bolt 9 and squeezing the limiting block 8, the four housings 4 are initially fixed together.

[0029] In one embodiment, such as Figure 1 and Figure 2 As shown, the four housings 4 are all threaded with first bolts 9. By tightening the first bolts 9, they are pressed against the limiting block 8, thereby initially fixing the four housings 4 together.

[0030] In one embodiment, such as Figure 1 and Figure 2 As shown, the bottom of each of the four housings 4 is fixedly connected to a fixing plate 10, and the top of each of the four fixing plates 10 is penetrated by a second bolt 11. The shielding cover is then placed over the outside of the circuit breaker, and finally the fixing plate 10 is fixed to the bottom plate below the circuit breaker using the second bolt 11. The structure is simple and easy to install.

[0031] In one embodiment, such as Figure 4As shown, the housing 4 includes a conductive layer 41, an insulating layer 42 attached to one side of the conductive layer 41, a protective layer 43 attached to one side of the insulating layer 42, and an anti-corrosion layer 44 attached to one side of the protective layer 43. The conductive layer 41 is made of silver-plated copper, the insulating layer 42 is made of semi-conductive rubber, the protective layer 43 is made of aluminum alloy, and the anti-corrosion layer 44 is made of nickel-based alloy. The plating thickness is >10µm, the silver-plated copper conductivity is >58MS / m, and it has high electromagnetic reflection and absorption capabilities. It directly wraps around the circuit breaker contacts or arc-extinguishing chamber, closely adhering to the arc-generating area, and rapidly attenuates high-frequency electromagnetic waves through the skin effect. The resistivity of the semi-conductive rubber is controlled at 10 Ω·cm. 3 ~10 6 Ω·cm, blocking the potential difference between conductive layer 41 and protective layer 43 to avoid partial discharge; nickel plating on the outer aluminum alloy provides mechanical strength, resists arc impact and vibration stress, is dustproof and moistureproof, and extends equipment life.

[0032] The above embodiment discloses a circuit breaker shielding structure. When the size of the shielding needs to be changed, the first bolt 9 on the outside of the housing 4 is loosened, and then the knob 6 is rotated. The knob 6 drives the rotating part 51 to rotate. Due to the setting of the connecting rod 52, the slider 3 slides inside the slide groove 2, thereby changing the position between the four housings 4. After adjustment, the first bolt 9 is locked, which effectively adjusts according to the size of the circuit breaker and improves adaptability. During the adjustment process, the limiting block 8 slides inside the limiting groove 7, which plays a limiting role and improves stability. By locking the first bolt 9 and the limiting block 8, the four housings 4 are initially fixed together. Then the shielding is put on the outside of the circuit breaker. Finally, the second bolt 11 is used to fix the fixing plate 10 to the bottom plate below the circuit breaker. The structure is simple and easy to install. The silver-plated copper has a conductivity of >58MS / m and has high electromagnetic reflection and absorption capabilities. It directly wraps the circuit breaker contacts or arc-extinguishing chamber and fits tightly with the arc-generating area. It quickly attenuates high-frequency electromagnetic waves through the skin effect. The resistivity of the semi-conductive rubber is controlled at 10. 3 ~10 6 Ω·cm, blocking the potential difference between conductive layer 41 and protective layer 43 to avoid partial discharge; nickel plating on the outer aluminum alloy provides mechanical strength, resists arc impact and vibration stress, is dustproof and moistureproof, and extends equipment life.

[0033] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A circuit breaker shield structure, comprising a top plate (1), four sliding grooves (2) are symmetrically and annularly arranged at the bottom of the top plate (1), sliding blocks (3) are slidingly installed in the sliding grooves (2), and housings (4) are fixedly connected to the bottoms of the four sliding blocks (3). characterized in that A connecting mechanism (5) is arranged at the bottom center point of the top plate (1).

2. The circuit breaker shield structure of claim 1, wherein, The connecting mechanism (5) comprises a rotating piece (51), the rotating piece (51) is rotationally installed at the bottom center point of the top plate (1), four connecting rods (52) are rotationally installed at the bottom of the rotating piece (51), and the four connecting rods (52) are respectively rotationally installed with the four sliding blocks (3).

3. The circuit breaker shield structure of claim 2, wherein, The top end of the rotating piece (51) penetrates through the top plate (1) and is connected with a knob (6).

4. The circuit breaker shield structure of claim 1, wherein, Limiting grooves (7) are arranged on one side of the four housings (4), limiting blocks (8) are fixedly connected to the other sides of the four housings (4), and the limiting blocks (8) are matched with the limiting grooves (7).

5. The circuit breaker shield structure of claim 1, wherein, First bolts (9) are threadedly connected to the outsides of the four housings (4).

6. The circuit breaker shield structure of claim 1, wherein, Second bolts (11) penetrate through the top portions of four fixed plates (10) fixedly connected to the bottoms of the four housings (4).

7. The circuit breaker shield structure of claim 1, wherein, The housing (4) comprises a conductive layer (41), an insulating layer (42) is attached to one side of the conductive layer (41), a protective layer (43) is attached to one side of the insulating layer (42), and a corrosion-resistant layer (44) is attached to one side of the protective layer (43).

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