Sealing structure of pole-mounted circuit breaker body

Abstract

The utility model relates to the technical field of circuit breaker, more specifically, especially relates to sealing structure of pole-mounted circuit breaker body, including: bottom plate, clamping groove, sealing platform, the circuit breaker casing is connected with bottom plate through clamping groove, and the inner wall of circuit breaker casing is abutted with first sealing washer, the upper portion of circuit breaker casing is equipped with the clamping protrusion, and first connecting flange sleeve sets up in the outside of clamping protrusion, the lower extreme of sleeve is equipped with second connecting flange, and second connecting flange is connected with first connecting flange through screw and is covered in the outside of clamping protrusion, the inner wall of second connecting flange is equipped with sealing groove, and second sealing washer installs in sealing groove, and second sealing washer and the outer wall of clamping protrusion form axial and radial double seal, the utility model discloses the improvement to the sealing structure of pole-mounted circuit breaker body, has the advantage that improves circuit breaker junction sealing, reduces the risk of partial discharge, thereby effectively solves the problem and the deficiency among prior art and equipment.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and more specifically, to the sealing structure of the pole-mounted circuit breaker body. Background Technology

[0002] A pole-mounted circuit breaker is a switching device installed on a utility pole to automatically disconnect the power supply in the event of a power failure, thereby protecting equipment and personnel. It features overload and short-circuit protection.

[0003] Current pole-mounted circuit breakers have a risk of water ingress due to poor sealing at the connection between the insulating bushing and the circuit breaker housing. Furthermore, the inner cavity of the insulating bushing is connected to the inside of the circuit breaker housing. Once water enters the inner cavity of the insulating bushing, it can easily cause a decline in insulation performance, increasing operational risks.

[0004] In view of this, we will study and improve the existing problems and provide a sealing structure for the pole-mounted circuit breaker body. The aim of this technology is to solve the problems and improve its practical value. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing structure for the body of a pole-mounted circuit breaker to solve the problems and deficiencies mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides a sealing structure for the pole-mounted circuit breaker body, which is achieved by the following specific technical means:

[0007] The sealing structure of the pole-mounted circuit breaker body includes: a base plate, a slot, a sealing platform, a first sealing ring, a circuit breaker housing, a snap-fit ​​protrusion, a first connecting flange, a sleeve, a second connecting flange, a sealing groove, a second sealing ring, a vacuum chamber, a stationary contact, a moving contact, an insulating tie rod, a sealing plate, and a third sealing ring. The base plate has symmetrical slots on both sides, and the sealing platform is fixed to the top surface of the base plate, with the first sealing ring embedded in the sealing platform. The circuit breaker housing is snapped into the base plate via the slots, and the two are fixed together by screws. The inner wall of the circuit breaker housing abuts against the first sealing ring. A snap-fit ​​protrusion is provided above the circuit breaker housing, and the first connecting flange is sleeved on the... The bushing has a snap-fit ​​protrusion on the outside, and a first connecting flange is fixedly connected to the circuit breaker housing; the lower end of the bushing has a second connecting flange, which is connected to the first connecting flange by screws and covers the outside of the snap-fit ​​protrusion; a sealing groove is formed on the inner wall of the second connecting flange, and a second sealing ring is installed in the sealing groove, forming a double seal in both axial and radial directions with the outer wall of the snap-fit ​​protrusion; a vacuum chamber is provided at the upper part of the bushing; a stationary contact and a moving contact are provided in the vacuum chamber; an insulating pull rod passes through the sealing plate and is connected to the moving contact; the sealing plate is fixedly connected to the inner wall of the bushing and forms a dynamic seal with the insulating pull rod through a third sealing ring.

[0008] As a further optimization of this technical solution, the sealing structure of the pole-mounted circuit breaker body of this utility model is a rectangular shell with an opening at the lower end, and a snap-fit ​​part that matches the slot extends from the opening end.

[0009] As a further optimization of this technical solution, the sealing structure of the pole-mounted circuit breaker body of this utility model has a U-shaped sealing platform, and the side of the sealing platform is provided with a groove for installing the first sealing ring.

[0010] As a further optimization of this technical solution, the sealing structure of the pole-mounted circuit breaker body of this utility model has an L-shaped cross-section for the second sealing ring, and its inner wall is provided with multiple annular elastic protrusions with a semi-circular cross-section.

[0011] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0012] 1. The second connecting flange of this utility model has a sealing groove on its inner wall, and the second sealing ring is installed in the sealing groove. The second sealing ring and the outer wall of the snap-fit ​​protrusion form a double seal in the axial and radial directions. The snap-fit ​​protrusion is higher than the joint between the first connecting flange and the second connecting flange and seals with the second sealing ring. This can prevent rainwater and dust from entering the circuit breaker housing from the connection and improve the stability of the circuit breaker operation.

[0013] 2. The sealing platform of this utility model is fixed on the top surface of the base plate, and a first sealing ring is embedded in the sealing platform. The circuit breaker housing is a rectangular housing with an opening at the bottom, and its opening end extends with a snap-fit ​​part that matches the slot. The circuit breaker housing is snapped into the base plate through the slot, and the inner wall of the circuit breaker housing abuts against the first sealing ring. The opening of the circuit breaker housing faces downward so that rainwater flows down the circuit breaker housing. The sealing platform is higher than the base plate, and the sealing platform and the circuit breaker housing are sealed by the first sealing ring to prevent moisture and dust from entering the circuit breaker housing from the gaps.

[0014] 3. The sealing plate of this utility model is fixed to the inner wall of the bushing and forms a dynamic seal with the insulating tie rod through the third sealing ring, so as to realize the airtight isolation between the inner cavity of the bushing and the inner cavity of the circuit breaker housing, maintain the dielectric strength of the environment inside the bushing, and reduce the risk of partial discharge.

[0015] 4. This utility model improves the sealing structure of the pole-mounted circuit breaker body, which has the advantages of improving the sealing performance of the circuit breaker connection and reducing the risk of partial discharge, thereby effectively solving the problems and shortcomings in the existing technology and equipment. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 This is an exploded structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0020] Figure 4 This is an enlarged structural diagram of point B in this utility model;

[0021] Figure 5 This is a cross-sectional view of the second sealing ring of this utility model.

[0022] In the diagram: 1. Base plate; 2. Slot; 3. Sealing platform; 4. First sealing ring; 5. Circuit breaker housing; 6. Snap-fit ​​protrusion; 7. First connecting flange; 8. Sleeve; 9. Second connecting flange; 10. Sealing groove; 11. Second sealing ring; 12. Vacuum chamber; 13. Stationary contact; 14. Moving contact; 15. Insulating tie rod; 16. Sealing plate; 17. Third sealing ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figures 1 to 5 This utility model provides a specific technical implementation scheme for the sealing structure of the pole-mounted circuit breaker body:

[0025] The sealing structure of the pole-mounted circuit breaker body includes: a base plate 1, a slot 2, a sealing platform 3, a first sealing ring 4, a circuit breaker housing 5, a snap-fit ​​protrusion 6, a first connecting flange 7, a sleeve 8, a second connecting flange 9, a sealing groove 10, a second sealing ring 11, a vacuum chamber 12, a stationary contact 13, a moving contact 14, an insulating tie rod 15, a sealing plate 16, and a third sealing ring 17; slots 2 are symmetrically provided on both sides of the base plate 1, and the sealing platform 3 is fixed on the top surface of the base plate 1, with the first sealing ring 4 embedded in the sealing platform 3; the sealing platform 3 has a U-shaped structure and a sealing... The side of the platform 3 is provided with a groove for installing the first sealing ring 4; the circuit breaker housing 5 is a rectangular housing with an opening at the bottom, and its opening end extends with a snap-fit ​​part that matches the slot 2; the circuit breaker housing 5 is snapped to the base plate 1 through the slot 2, and the two are fixed together by screws, and the inner wall of the circuit breaker housing 5 abuts against the first sealing ring 4; the opening of the circuit breaker housing 5 faces downward so that rainwater flows down the circuit breaker housing 5, the sealing platform 3 is higher than the base plate 1, and the sealing platform 3 and the circuit breaker housing 5 are sealed by the first sealing ring 4 to prevent moisture and dust from entering the circuit breaker housing 5 from the gaps.

[0026] A snap-fit ​​protrusion 6 is provided on the upper part of the circuit breaker housing 5, and a first connecting flange 7 is sleeved on the outside of the snap-fit ​​protrusion 6 and fixedly connected to the circuit breaker housing 5. A second connecting flange 9 is provided at the lower end of the sleeve 8, and the second connecting flange 9 is connected to the first connecting flange 7 by screws and covers the outside of the snap-fit ​​protrusion 6. A sealing groove 10 is provided on the inner wall of the second connecting flange 9, and a second sealing ring 11 is installed in the sealing groove 10. The second sealing ring 11 and the outer wall of the snap-fit ​​protrusion 6 form a double seal in both axial and radial directions. The cross-section of the second sealing ring 11 is L-shaped, and its inner wall is provided with multiple annular elastic protrusions with a semi-circular cross-section. The snap-fit ​​protrusion 6 is higher than the joint between the first connecting flange 7 and the second connecting flange 9 and seals with the second sealing ring 11, which can prevent rainwater and dust from entering the circuit breaker housing 5 from the connection point and improve the stability of the circuit breaker operation.

[0027] The upper part of the bushing 8 is provided with a vacuum chamber 12; the vacuum chamber 12 is provided with a stationary contact 13 and a moving contact 14 that cooperate with each other; the insulating pull rod 15 passes through the sealing plate 16 and is connected to the moving contact 14; the sealing plate 16 is fixed to the inner wall of the bushing 8 and forms a dynamic seal with the insulating pull rod 15 through the third sealing ring 17; the inner cavity of the bushing 8 is airtightly isolated from the inner cavity of the circuit breaker housing 5, the dielectric strength of the environment inside the bushing 8 is maintained, and the risk of partial discharge is reduced.

[0028] Specific implementation steps:

[0029] In use, the circuit breaker housing 5 is inserted into the slot 2, and the first sealing ring 4 abuts against the inner wall of the circuit breaker housing 5 to form a seal. The circuit breaker housing 5 is fixed to the base plate 1 by screws, and the second connecting flange 9 is connected to the first connecting flange 7 to fix the bushing 8. The second sealing ring 11 abuts against the snap-fit ​​protrusion 6 to seal the connection. The sealing plate 16 and the third sealing ring 17 isolate the inner cavity of the bushing 8 from the inner cavity of the circuit breaker housing 5 and maintain the dielectric strength of the environment inside the bushing 8.

[0030] In summary: The sealing structure of the column-mounted circuit breaker body features a sealing groove on the inner wall of the second connecting flange, with a second sealing ring installed within the groove. The second sealing ring and the outer wall of the snap-fit ​​protrusion form a double axial and radial seal. The snap-fit ​​protrusion is higher than the joint between the first and second connecting flanges and seals with the second sealing ring, preventing rainwater and dust from entering the circuit breaker housing from the connection point, thus improving the stability of circuit breaker operation. The circuit breaker is fixed to the top surface of the base plate via a sealing platform, with a first sealing ring embedded in the platform. The circuit breaker housing is a rectangular housing with an opening at the bottom, and its opening extends with a snap-fit ​​part matching the slot. The circuit breaker housing is snapped into the base plate via the slot, and the inner wall of the circuit breaker housing... The wall abuts against the first sealing ring, and the circuit breaker housing opening faces downwards to allow rainwater to flow down the circuit breaker housing. The sealing platform is higher than the base plate, and the sealing platform and the circuit breaker housing are sealed by the first sealing ring to prevent moisture and dust from entering the circuit breaker housing through gaps. The sealing plate is fixed to the inner wall of the bushing and forms a dynamic seal with the insulating tie rod through the third sealing ring, achieving airtight isolation between the inner cavity of the bushing and the inner cavity of the circuit breaker housing, maintaining the dielectric strength of the environment inside the bushing, and reducing the risk of partial discharge. This utility model improves the sealing structure of the pole-mounted circuit breaker body, which has the advantages of improving the sealing performance of the circuit breaker connection and reducing the risk of partial discharge, thus effectively solving the problems and shortcomings of the existing technology and equipment.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. The sealing structure of the pole-mounted circuit breaker body includes: The circuit breaker housing (1), slot (2), sealing platform (3), first sealing ring (4), circuit breaker housing (5), snap-fit ​​protrusion (6), first connecting flange (7), sleeve (8), second connecting flange (9), sealing groove (10), second sealing ring (11), vacuum chamber (12), stationary contact (13), moving contact (14), insulating tie rod (15), sealing plate (16), and third sealing ring (17) are characterized in that: slots (2) are symmetrically provided on both sides of the base plate (1), and the sealing platform (3) is fixed on the top surface of the base plate (1), and the first sealing ring (4) is embedded on the sealing platform (3); the circuit breaker housing (5) is snapped to the base plate (1) through the slot (2), and the two are fixed by screws, and the inner wall of the circuit breaker housing (5) abuts against the first sealing ring (4); the circuit breaker housing (5) is provided with a snap-fit ​​protrusion (6) on the top, and the first connecting flange (7) is sleeved on the slot. The sleeve (8) is connected to the outside of the protrusion (6), and the first connecting flange (7) is fixedly connected to the circuit breaker housing (5); the lower end of the sleeve (8) is provided with a second connecting flange (9), and the second connecting flange (9) is connected to the first connecting flange (7) by screws and covers the outside of the snap-fit ​​protrusion (6); a sealing groove (10) is opened on the inner wall of the second connecting flange (9), and a second sealing ring (11) is installed in the sealing groove (10), and the second sealing ring (11) and the outer wall of the snap-fit ​​protrusion (6) form a double seal in the axial and radial directions; a vacuum chamber (12) is provided at the upper part of the sleeve (8); a stationary contact (13) and a moving contact (14) are provided in the vacuum chamber (12); the insulating pull rod (15) passes through the sealing plate (16) and is connected to the moving contact (14); the sealing plate (16) is fixedly connected to the inner wall of the sleeve (8) and forms a dynamic seal with the insulating pull rod (15) through the third sealing ring (17).

2. The sealing structure of the pole-mounted circuit breaker body according to claim 1, characterized in that: The circuit breaker housing (5) is a rectangular housing with an opening at the lower end, and its opening end extends to a snap-fit ​​part that matches the slot (2).

3. The sealing structure of the pole-mounted circuit breaker body according to claim 1, characterized in that: The sealing platform (3) has a U-shaped structure, and the side of the sealing platform (3) is provided with a groove for installing the first sealing ring (4).

4. The sealing structure of the pole-mounted circuit breaker body according to claim 1, characterized in that: The second sealing ring (11) has an L-shaped cross section, and its inner wall is provided with multiple annular elastic protrusions with a semi-circular cross section.

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