CN219617079U

CN219617079U - Welding fixture for corrugated pipe internal welding

Info

Publication number: CN219617079U
Application number: CN202320653609.3U
Authority: CN
Inventors: 徐娟
Original assignee: Jiangsu Aidi Electromechanical Equipment Industry Co ltd
Current assignee: Jiangsu Aidi Electromechanical Equipment Industry Co ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-09-01
Anticipated expiration: 2033-03-28

Abstract

The utility model discloses a welding fixture for inner welding of corrugated pipes, which comprises an upper die and a lower die, wherein the upper die comprises a first corrugated pipe limiting ring and a first welding part limiting ring, the lower die comprises a second corrugated pipe limiting ring and a second welding part limiting ring, the first corrugated pipe limiting ring is of a semicircular structure, first screw holes are formed in two end faces of the first corrugated pipe limiting ring, the second corrugated pipe limiting ring is of a semicircular structure, second screw holes are formed in two end faces of the second corrugated pipe limiting ring, a circular ring notch is formed in the rear side of the second screw hole, and bolts for fastening the second screw holes and the first screw holes are arranged at the circular ring notch. The welding fixture is arranged when the inner welding structure of the corrugated pipe assembly is welded, the outside of the end of the corrugated pipe is clamped, the constraint degree is increased, the welding deformation of the corrugated pipe is reduced, the welding is convenient, and the welding yield is improved.

Description

Welding fixture for corrugated pipe internal welding

Technical Field

The utility model relates to the field of corrugated pipe welding, in particular to a welding fixture for corrugated pipe internal welding.

Background

The bellows assembly generally plays a role in sealing, preventing leakage and compensating in a pipeline, and good weld quality can ensure the tightness of the bellows assembly. The design of the welded structure is most critical to the weld deformation and is the most complex factor. The general principle is that the welding residual stress is increased along with the increase of the restraint degree, and the welding deformation is correspondingly reduced. The welding of the bellows assembly is divided into external welding and internal welding according to the welding structure of the bellows and the machined part. The outer welding is that the machined part is welded outside the corrugated pipe orifice end, the inner welding is that the machined part is welded inside the corrugated pipe orifice end, the corrugated pipe wall thickness is thinner than the machined part, and the deformation is larger during welding. The machined part restrains the corrugated pipe during external welding, so that the deformation of the corrugated pipe can be reduced, and the welding defect of the machined part and the corrugated pipe can be reduced. In general, the welding structure of the inner welding of the corrugated pipe can generate larger welding deformation due to no excessive constraint on the outside, and in order to reduce the welding deformation, a welding fixture is arranged in the utility model.

Specifically, during internal welding, the corrugated pipe is restrained by the machined part at the end of the corrugated pipe without a welding fixture, so that the corrugated pipe deforms during welding, a gap between the corrugated pipe and the machined part becomes large, welding current becomes large, the welding temperature is overheated, the end of the corrugated pipe with the thin wall deforms and collapses, welding defects are caused, the quality of a welding seam cannot be ensured, the machined part and the corrugated pipe can be scrapped, and the cost is increased.

Disclosure of Invention

The utility model aims to: the utility model aims to solve the technical problem of providing a welding fixture for corrugated pipe inner welding aiming at the defects of the prior art.

In order to solve the technical problems, the utility model discloses a welding fixture for welding inside corrugated pipes, which comprises an upper die and a lower die, wherein the upper die comprises a first corrugated pipe limiting ring and a first welding part limiting ring, the lower die comprises a second corrugated pipe limiting ring and a second welding part limiting ring, the first corrugated pipe limiting ring is of a semicircular structure, first screw holes are formed in two end faces of the first corrugated pipe limiting ring, the second corrugated pipe limiting ring is of a semicircular structure, second screw holes are formed in two end faces of the second corrugated pipe limiting ring, a circular ring notch is formed in the rear side of the second screw hole, and bolts for fastening the second screw holes and the first screw holes are arranged at the circular ring notch.

In the utility model, a gasket is arranged between the bolt and the second screw hole, and the gasket is placed between the upper die and the bolt to increase the bearing area.

In the utility model, a gap is reserved between the upper die and the lower die, so that the orifice end of the corrugated pipe is prevented from being damaged by clamping.

In the utility model, the first corrugated pipe limiting ring and the first welding piece limiting ring are of an integrated structure.

In the utility model, the second corrugated pipe limiting ring and the second welding piece limiting ring are of an integrated structure.

In the utility model, the end face of the upper die is flat, the end face of the lower die is flat, the bolt is convenient to screw, and the disassembly is convenient.

The beneficial effects are that: the welding fixture is arranged when the inner welding structure of the corrugated pipe assembly is welded, the outside of the end of the corrugated pipe is clamped, the constraint degree is increased, the welding deformation of the corrugated pipe is reduced, the welding is convenient, and the welding yield is improved.

Drawings

The foregoing and/or other advantages of the utility model will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings and detailed description.

FIG. 1 is a front view;

FIG. 2 is a side view;

fig. 3 is a schematic structural diagram.

Reference numerals in the drawings: 1. go up mould, 1a, first bellows spacing ring, 1b, first welding spare spacing ring, 2, lower mould, 2a, second bellows spacing ring, 2b, second welding spare spacing ring, 3, first screw, 4, second screw, 5, ring breach, 6, bolt, 7, gasket, 8, clearance.

Detailed Description

Examples:

as shown in fig. 1, fig. 2 and fig. 3, the embodiment provides a welding fixture for welding in a corrugated pipe, which comprises an upper die 1 and a lower die 2, wherein the upper die 1 comprises a first corrugated pipe limiting ring 1a and a first welding piece limiting ring 1b, the lower die 2 comprises a second corrugated pipe limiting ring 2a and a second welding piece limiting ring 2b, the first corrugated pipe limiting ring is of a semicircular structure, two end faces of the first corrugated pipe limiting ring are provided with first screw holes 3, the second corrugated pipe limiting ring is of a semicircular structure, two end faces of the second corrugated pipe limiting ring are provided with second screw holes 4, the rear side of each second screw hole is provided with a circular ring notch 5, and bolts 6 for fastening the second screw holes and the first screw holes are arranged at the circular ring notch. A gasket 7 is arranged between the bolt and the second screw hole. A gap 8 is reserved between the upper die and the lower die. The first corrugated pipe limiting ring and the first welding piece limiting ring are of an integrated structure. The second corrugated pipe limiting ring and the second welding piece limiting ring are of an integrated structure. The end face of the upper die is flat, and the end face of the lower die is flat.

When the welding device is used, as shown in fig. 2, a workpiece 9 to be welded is placed on one side of a corrugated pipe 10 and is abutted against the side, then a first corrugated pipe limiting ring 1a of an upper die 1 is sleeved on the outer side of the end part of the corrugated pipe, a first welding piece limiting ring 1b is sleeved on the outer ring of the workpiece 9 and abutted against the outer wall of a first wave of the corrugated pipe, a lower die is installed at a matching position in the same manner, then the upper die 1 and the lower die 2 are fastened through a bolt 6, welding is started, and after the welding is finished, the upper die and the lower die are disassembled by loosening the bolt 6.

The utility model provides a thought and a method for welding a welding fixture in a corrugated pipe, and a method and a way for realizing the technical scheme are numerous, the above description is only a preferred embodiment of the utility model, and it should be noted that, for a person skilled in the art, a plurality of improvements and modifications can be made without departing from the principle of the utility model, and the improvements and modifications are also considered as the protection scope of the utility model. The components not explicitly described in this embodiment can be implemented by using the prior art.

Claims

1. A welding jig for welding in bellows, its characterized in that includes mould (1) and lower mould (2), go up mould (1) including first bellows spacing ring (1 a) and first welding spare spacing ring (1 b), lower mould (2) include second bellows spacing ring (2 a) and second welding spare spacing ring (2 b), first bellows spacing ring is semicircle ring structure, and its both ends face is equipped with first screw (3), second bellows spacing ring is semicircle ring structure, and its both ends face is equipped with second screw (4), and the second screw rear side is equipped with ring breach (5), and ring breach department is equipped with bolt (6) that are used for fastening second screw and first screw.

2. Welding fixture for inner welding of corrugated pipes according to claim 1, characterized in that a spacer (7) is arranged between the bolt and the second screw hole.

3. A welding jig for use in corrugated pipe inner welding according to claim 1, wherein a gap is left between said upper die and said lower die.

4. The welding fixture for corrugated pipe inner welding according to claim 1, wherein the first corrugated pipe retainer ring and the first welding member retainer ring are of a unitary structure.

5. The welding fixture for corrugated pipe inner welding according to claim 1, wherein the second corrugated pipe retainer ring and the second welding member retainer ring are of an integral structure.

6. A welding jig for use in corrugated pipe inner welding according to claim 1, wherein the end face of the upper die is flat, and the end face of the lower die is flat.