A vacuum arc chamber assembly welding structure

Abstract

The present invention discloses a vacuum arc chamber assembly welding structure, which is characterized by comprising a movable rod (1), a positioning hole (2) being provided above the movable rod (1), and a contact (3) being connected at the bottom of the movable rod (1) by riveting. The present invention is rationally designed, and the structure can ensure that each weld of the vacuum arc chamber has reliable welding pressure without using a counterweight clamp. By cooperating with the positioning hole and the positioning clamp, the bellows shielding cover, the bellows and the sealing ring can be fixed at the position required by the design, and the position of the sealing ring can be adjusted by adjusting the diameter of the clamping rod. Manual operation is no longer required, and the process is simple and quick. The welding position is fixed, thereby improving the welding quality. The movable rod and the contact are fixed by riveting, which simplifies the welding operation.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum arc extinguishing chambers, in particular to an assembly welding structure of a vacuum arc extinguishing chamber. Background Art

[0002] The vacuum interrupter is the main component of the vacuum circuit breaker. The existing vacuum circuit breaker has a static contact at one end and a moving contact at the other end. The moving rod is connected to the moving contact, and welding is used between the moving rod and the moving contact. The process is complex, the production time is long, and the cost is high. In addition, when installing components such as bellows on the moving rod, it is necessary to use a counterweight clamp to compress the bellows to the position required by the design before welding and installing components such as the sealing ring and the porcelain shell. Since the performance of each bellows is slightly different, the counterweight clamp cannot accurately compress the bellows to the standard position and requires manual positioning. The operation is complicated and the welding quality is difficult to control. Existing structures such as Figure 4 As shown, the movable rod 1 and the contact 3 are welded and fixed. When the bellows 7, the sealing ring 8 and the porcelain shell 11 are installed, the bellows 7 is compressed by the counterweight fixture 12 above the sealing ring 8, and then installed and welded. Summary of the Invention

[0003] The purpose of the present invention is to provide a vacuum interrupter assembly welding structure. The vacuum interrupter of the present invention has a reasonable design, reduces production costs, has stable and convenient welding, and improves product quality.

[0004] The technical solution of the present invention is a vacuum arc chamber assembly welding structure, which includes a moving rod, a positioning hole is provided above the moving rod, and the bottom of the moving rod is connected to the contact by riveting.

[0005] The above-mentioned vacuum arc extinguishing chamber is assembled with a welding structure, and the positioning hole is inserted into a positioning fixture.

[0006] The above-mentioned vacuum interrupter assembly welding structure has a shield cover limiting step provided below the outer side of the moving rod.

[0007] The above-mentioned vacuum arc chamber is assembled with a welding structure, and the bellows shielding cover, bellows and sealing ring are placed on the shielding cover limiting step in sequence, and a positioning fixture is inserted into the positioning hole. The bellows shielding cover, bellows and sealing ring are limited by the positioning fixture and the shielding cover limiting step.

[0008] The above-mentioned vacuum interrupter assembly welding structure, the positioning fixture includes a positioning rod passing through the positioning hole, and a clamping rod placed below the positioning rod.

[0009] The above-mentioned vacuum interrupter is assembled with a welding structure, and a porcelain shell is provided outside the bellows shield, the bellows and the sealing ring.

[0010] Beneficial Effects: Compared with existing technologies, this invention offers a more rational design. This structure ensures reliable welding pressure across all welds in the vacuum interrupter, even without the use of a counterweight fixture. The positioning holes and fixtures allow the bellows shield, bellows, and sealing ring to be fixed in the desired design position. Adjusting the sealing ring position is accomplished by adjusting the diameter of the clamping rod, eliminating manual labor. This simple, quick, and reliable process eliminates manual operation, stabilizes the welding position, and improves welding quality. The movable rod and contact are riveted, simplifying welding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the movable rod of the present invention;

[0012] Figure 2 This is a schematic diagram of the use structure of the positioning fixture of the present invention;

[0013] Figure 3 This is a schematic diagram of the installation structure of the porcelain shell of the present invention;

[0014] Figure 4 It is a schematic diagram of the installation structure of the existing vacuum interrupter moving rod. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0016] Example 1. A vacuum interrupter assembly welding structure includes a movable rod 1 with a positioning hole 2 defined above it and a riveted contact 3 connected to its bottom. The positioning hole 2 allows for compression and positioning of a bellows 7 during vacuum interrupter installation. The riveted connection to the contact 3 at the bottom of the movable rod 1 simplifies fabrication.

[0017] The positioning hole 2 is inserted into the positioning fixture 4 , and after the positioning fixture 4 is fixed to the positioning hole 2 , the position of the bellows 7 is defined.

[0018] A shield cover limiting step 5 is provided at the lower outer side of the movable rod 1 for limiting the position of the bellows shield cover 6 .

[0019] The bellows shielding cover 6, bellows 7 and sealing ring 8 are placed on the shielding cover limiting step 5 in sequence, and the positioning fixture 4 is inserted into the positioning hole 2. The bellows shielding cover 6, bellows 7 and sealing ring 8 are limited by the positioning fixture 4 and the shielding cover limiting step 5 to facilitate the welding and installation of the sealing ring 8.

[0020] The positioning fixture 4 includes a positioning rod 9 passing through the positioning hole 2 and a clamping rod 10 placed below the positioning rod 9. The positioning rod 9 can provide a force point for the positioning fixture 4, and then the thickness and diameter of the clamping rod 10 can be adjusted to adjust the installation position of the sealing ring 8 and the moving rod 1. After the thickness and diameter of the clamping rod 10 are determined, there is a rigid contact between the positioning hole 2, the positioning rod 9, the clamping rod 10 and the sealing ring 8, so that the distance between the top surface of the sealing ring 8 of each vacuum arc chamber and the positioning hole 2 is fixed, and the position of each sealing ring 8 is uniform and unchanged, which improves the welding quality and does not require the operator to make additional adjustments, making the operation convenient.

[0021] A porcelain shell 11 is provided outside the bellows shielding cover 6 , the bellows 7 and the sealing ring 8 , and the porcelain shell 11 is installed outside the vacuum interrupter.

[0022] Processing process:

[0023] A positioning hole 2 is machined above the movable rod 1, and the bottom of the movable rod 1 is connected to the contact 3 by riveting. The bellows shielding cover 6, bellows 7 and sealing ring 8 are installed on the outside of the movable rod 1. The bellows 7 is compressed by the sealing ring 8, and the bellows 7 deforms to generate elastic force, which ensures the welding pressure of the upper and lower end faces of the bellows 7. After determining the compression position of the bellows 7, the positioning fixture 4 is inserted into the positioning hole 2 of the movable rod 1 to limit the bellows 7, so as to achieve the purpose of controlling the relative position and size of the sealing ring 8 and the contact 3. A porcelain shell 11 is provided outside the bellows shielding cover 6, the bellows 7 and the sealing ring 8. The assembled movable rod assembly is placed on the end face of the porcelain shell 11. At this time, since the relative position and size of the sealing ring 8 and the contact 3 are compressed and positioned, the moving and static contacts are in a separated state, so as to use the self-weight of the movable rod assembly to apply pressure to the welding of the sealing ring 8 and the porcelain shell 11, and complete the welding of the porcelain shell 11.

[0024] The positioning rod 9 of the positioning fixture 4 passes through the positioning hole 2, and then the clamping rod 10 is placed under the positioning rod 9. The sealing ring 8 is pressed under the clamping rod 10. The positioning rod 9 can provide a force point for the positioning fixture 4, and then the thickness and diameter of the clamping rod 10 can be adjusted to adjust the installation position of the sealing ring 8 and the moving rod 1.

Claims

1. A vacuum interrupter assembly welding structure, characterized in that: The invention comprises a movable rod (1), a positioning hole (2) is provided above the movable rod (1), and a contact (3) is connected to the bottom of the movable rod (1) by riveting; a positioning fixture (4) is inserted into the positioning hole (2); a shielding cover limiting step (5) is provided below the outer side of the movable rod (1); a bellows shielding cover (6), a bellows (7) and a sealing ring (8) are sequentially placed on the shielding cover limiting step (5), a positioning fixture (4) is inserted into the positioning hole (2), and the bellows shielding cover (6), the bellows (7) and the sealing ring (8) are limited by the positioning fixture (4) and the shielding cover limiting step (5); the positioning fixture (4) comprises a positioning rod (9) passing through the positioning hole (2), and a clamping rod (10) placed below the positioning rod (9).

2. The vacuum interrupter assembly welding structure according to claim 1, characterized in that: A porcelain shell (11) is provided outside the bellows shielding cover (6), the bellows (7) and the sealing ring (8).

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