A kind of end cap sealing mechanism and circuit breaker

Abstract

This utility model relates to the field of circuit breakers, providing an end cover sealing mechanism and a circuit breaker. The end cover sealing mechanism includes an insulating shell and a metal bellows. A pull rod and an end cover are disposed inside the insulating shell, and a spring is disposed on the driving end of the pull rod. One end of the metal bellows is sealed to the end cover, and the other end of the metal bellows is provided with a sealing sleeve, which is sealed to the pull rod. The spring is located inside the metal bellows. The metal bellows is installed and sealed by welding, that is, one end of the metal bellows is welded to the end cover, and the other end is welded to the pull rod through the sealing sleeve, thus forming a sealing design for the insulating shell. Therefore, the sealing sleeve can be made of steel, copper, or stainless steel, etc., to weld the metal bellows, ensuring a strong and reliable weld, achieving a good sealing design, preventing gas leakage, and ensuring the normal operation of the circuit breaker.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to an end cap sealing mechanism and a circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers according to their application.

[0003] The ends of the circuit breaker's insulating housing require a sealing design to make the existing sealing structure more reliable, prevent internal components from getting damp or contaminated, extend service life, and ensure stable operation of the circuit breaker in various environments. However, the existing sealing structure has design flaws, making it difficult to completely isolate the external environment, resulting in poor sealing performance and affecting the circuit breaker's performance. Utility Model Content

[0004] The purpose of this utility model is to provide an end cap sealing mechanism and a circuit breaker, which aims to improve the problem of poor sealing design of existing circuit breakers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an end cap sealing mechanism, comprising:

[0006] An insulating housing, inside which is provided a pull rod for opening or closing the gate, and an end cover provided on the port of the insulating housing, and a spring is provided on the drive end of the pull rod;

[0007] A metal bellows, one end of which is sealed on the end cap, and the other end of which is provided with a sealing sleeve, which is sealed on the pull rod, and the spring is located inside the metal bellows.

[0008] Preferably, a first sealing weld structure is provided between the end cap and the metal bellows.

[0009] Preferably, the sealing sleeve is an annular sleeve for welding, and the other end of the metal bellows is welded onto the annular sleeve. A second sealing weld structure is provided between the annular sleeve and the pull rod.

[0010] Preferably, a groove is provided on the end of the pull rod, and the spring is disposed in the groove.

[0011] Preferably, the end cap is provided with a fixing groove that engages with the end of the metal bellows, and a weld is formed between the metal bellows and the fixing groove.

[0012] Preferably, a welding ring is provided between the annular sleeve and the pull rod, and a welding groove is provided on the pull rod to engage the welding ring.

[0013] A circuit breaker is also provided, including the end cap sealing mechanism as described above.

[0014] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0015] 1. This utility model allows for a sealed connection of the metal bellows through welding. One end of the metal bellows is welded to the end cap, while the other end is welded to the tie rod via a sealing sleeve, forming a sealed design for the insulating shell. Therefore, the sealing sleeve can be made of steel, copper, or stainless steel, etc., to weld the metal bellows, ensuring a strong and reliable weld, achieving a good sealing design, preventing gas leakage, and ensuring the normal operation of the circuit breaker. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the end cap sealing mechanism of the present invention;

[0017] Figure 2 This is a partial view of the end cap sealing mechanism of the end cap sealing mechanism described in this utility model;

[0018] Figure 3 for Figure 2 Enlarged view of the circle marked A in the middle;

[0019] Figure 4 for Figure 2 Enlarged view of the circle marked with B in the middle;

[0020] Figure 5 This is a partial view of the pull rod end of the end cap sealing mechanism of the end cap sealing mechanism described in this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 10. Insulating housing; 101. Pull rod; 102. End cap; 103. Spring; 104. Welding ring;

[0023] 1011, Groove; 1012, Welding groove; 1021, Fixing groove;

[0024] 20. Metal bellows; 201. Sealing sleeve. Detailed Implementation

[0025] 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. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0026] Additionally, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are all based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element of this utility model must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] When an element is referred to as being "fixed to," "set on," or "contained on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to," it can be directly connected to or indirectly connected to that other element.

[0028] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections 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 utility model according to the specific circumstances.

[0029] Example 1

[0030] Please refer to Figure 1 , Figure 2 and Figure 5 As shown, this embodiment provides an end cap 102 sealing mechanism, including an insulating housing 10 and a metal bellows 20. A pull rod 101 for opening or closing the gate is provided inside the insulating housing 10, and an end cap 102 is provided to cover the port of the insulating housing 10. A spring 103 is provided on the driving end of the pull rod 101. One end of the metal bellows 20 is sealed on the end cap 102, and the other end of the metal bellows 20 is provided with a sealing sleeve 201. The sealing sleeve 201 is sealed on the pull rod 101, and the spring 103 is located inside the metal bellows 20.

[0031] Specifically, the installation of the metal bellows 20 can be achieved through welding for a sealed connection. One end of the metal bellows 20 is welded to the end cap 102, and the other end is welded to the pull rod 101 via a sealing sleeve 201, forming a sealed design for the insulating housing 10. Therefore, the sealing sleeve 201 can be made of steel, copper, stainless steel, or other weldable materials to ensure a strong and reliable weld, achieving a good sealing design, preventing gas leakage, and ensuring the normal operation of the circuit breaker.

[0032] Furthermore, in this embodiment, a first sealing weld structure is provided between the end cap 102 and the metal bellows 20. This welded sealing connection not only effectively prevents gas leakage but also enhances the stability of the overall structure, ensuring excellent sealing performance under various working environments.

[0033] Similarly, in this embodiment, the sealing sleeve 201 is an annular sleeve for welding. The other end of the metal bellows 20 is welded onto the annular sleeve, and a second sealing weld structure is provided between the annular sleeve and the pull rod 101. The sealing sleeve 201 can be adapted to the size of the metal bellows 20 and the pull rod 101 so as to tightly connect the metal bellows 20 and the pull rod 101 and ensure the sealing effect.

[0034] like Figure 2 and Figure 4 As shown, in this embodiment, a groove 1011 is provided on the end of the pull rod 101, and the spring 103 is provided in the groove 1011. The groove 1011 can accommodate the extension and retraction of the spring 103, adjust the distance between the pull rod 101 and the end cover 102, and provide the required elastic force for the opening or closing of the pull rod 101, thereby ensuring the stability of operation.

[0035] like Figure 3 As shown, in this embodiment, the end cap 102 is provided with a fixing groove 1021 that engages with the end of the metal bellows 20, and a weld is formed between the metal bellows 20 and the fixing groove 1021. The design of the fixing groove 1021 allows the metal bellows 20 to be securely welded to the end cap 102. Simultaneously, it maintains the shape stability of the metal bellows 20, ensuring a vertical position and stable axial deformation, thereby guaranteeing the service life of the metal bellows 20.

[0036] like Figure 4As shown, in this embodiment, a welding ring 104 is provided between the annular sleeve and the pull rod 101. The pull rod 101 is provided with a welding groove 1012 for engaging the welding ring 104. Through the design of the welding ring 104, it can be well adapted to pull rods 101 of different sizes to ensure the strength and sealing of the weld, ensure the stable connection between the pull rod 101 and the annular sleeve, prevent the problem of weak welding caused by size differences, and further improve the reliability and service life of the overall structure.

[0037] Example 2

[0038] This embodiment provides a circuit breaker, including the end cover 102 sealing mechanism as described in Embodiment 1, so that a complete sealed environment is formed inside the insulating housing 10, ensuring that gas does not leak out and improving the safety and stability of the circuit breaker.

[0039] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An end cap sealing mechanism, characterized in that, include: An insulating housing, inside which is provided a pull rod for opening or closing the gate, and an end cover provided on the port of the insulating housing, and a spring is provided on the drive end of the pull rod; A metal bellows, one end of which is sealed on the end cap, and the other end of which is provided with a sealing sleeve, which is sealed on the pull rod, and the spring is located inside the metal bellows.

2. The end cap sealing mechanism according to claim 1, characterized in that: A first sealing weld structure is provided between the end cap and the metal bellows.

3. The end cap sealing mechanism according to claim 1, characterized in that: The sealing sleeve is an annular sleeve for welding, and the other end of the metal bellows is welded onto the annular sleeve. A second sealing weld structure is provided between the annular sleeve and the pull rod.

4. The end cap sealing mechanism according to claim 1, characterized in that: The end of the pull rod is provided with a groove, and the spring is disposed in the groove.

5. The end cap sealing mechanism according to claim 1 or 2, characterized in that: The end cap is provided with a fixing groove that engages with the end of the metal bellows, and a weld is formed between the metal bellows and the fixing groove.

6. The end cap sealing mechanism according to claim 3, characterized in that: A welding ring is provided between the annular sleeve and the pull rod, and a welding groove is provided on the pull rod to engage the welding ring.

7. A circuit breaker, characterized in that, Includes the end cap sealing mechanism as described in any one of claims 1 to 6.

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