Gas turbine ring pipe welding clamp

Abstract

The utility model provides a gas turbine ring pipe welding clamp which comprises a disc, a support device, an end positioning plate device, an angle seat device and a flange supporting device. The support device comprises a support, a positioning block A, a fixed drill bushing and a transverse plate; the support is fixed to the disc in the circumferential direction. A positioning block A is mounted at the top of the support; the transverse plate is mounted on the positioning block A; and the fixed drill bushing is mounted on the transverse plate. According to the utility model, the mutual positions of all parts or parts in a weldment can be accurately fixed according to the requirements of drawings and processes, welding deformation can be prevented in the welding process, and welding seams at various positions can be adjusted to the most favorable welding positions as much as possible; the gas turbine ring pipe positioning and welding clamp can have the drilling and welding functions and has the performance of the two clamps, and the tool manufacturing cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of special welding forming, and particularly relates to a welding fixture for a gas turbine loop pipe. Background Art

[0002] The fuel loop pipe is a key component in the external pipeline system of a gas turbine. Generally, the loop pipe product is formed by connecting an upper half main pipe and a lower half main pipe through flanges and welding joints. The main raw material of the pipe is 1Cr18Ni9Ti stainless steel pipe. The overall size of the fuel main pipe is large, and the assembly accuracy requirements for the welding joints connected thereto are high. Different models will use fuel main pipes with different specifications and sizes. After the pipe is bent from a straight pipe into a loop pipe, several through holes need to be processed on the pipe, and the welding joints, straight pipes and flanges are welded. When welding pipe joints and other fittings on the welded pipeline, the high temperature generated by welding and the shrinkage of the weld will cause the pipe to deform, which will further cause the two flange end faces to be non-parallel and the angle between the central axis of the pipe joint and the horizontal plane of the main pipe to deviate. Seriously, it will cause the subsequent general assembly work to be unable to proceed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a welding fixture for a gas turbine loop pipe, which can solve the production problems of large deformation during part assembly welding, high labor intensity of welding workers, and low production efficiency.

[0004] A welding fixture for a gas turbine loop pipe includes a disc, a support device, an end positioning plate device, an angle seat device and a flange support device; the support device includes a support, a positioning block A, a fixed drill sleeve and a cross plate; the support is circumferentially fixed on the disc; a positioning block A is installed on the top of the support; the cross plate is installed on the positioning block A; the fixed drill sleeve is installed on the cross plate.

[0005] Further, the end positioning plate device includes an end positioning plate and a positioning block B; the end positioning plate is fixed on the disc, and the positioning block B is installed on the end positioning plate.

[0006] Further, the angle seat device includes an angle seat A, a positioning block C and a bent handle cylindrical pin; the angle seat A is fixed on the disc; the positioning block C is fixed to the angle seat A by a bent handle cylindrical pin.

[0007] Further, an installation hole is provided at the upper end of the positioning block C.

[0008] Further, the flange support structure includes an angle seat B, a positioning block D and a bent handle cylindrical pin; the angle seat B is fixed on the disc; the positioning block D is fixed to the angle seat B by a bent handle cylindrical pin.

[0009] Further, an installation hole is provided at the upper end of the positioning block D.

[0010] The beneficial effects of the present utility model are as follows: The present utility model can accurately fix the relative positions of the various parts or components in the welded part according to the requirements of the drawings and the process, and can prevent welding deformation during the welding process, and can adjust the welds in various positions to the most favorable welding positions as much as possible. The positioning welding fixture for the combustor annular pipe can have drilling and welding functions, and has the performance of the above two fixtures, saving the cost of tooling production. Brief Description of the Drawings

[0011] Figure 1 is a cross-sectional view of the present utility model;

[0012] Figure 2 is a top view of the present utility model;

[0013] Figure 3 is an isometric view of the present utility model. Detailed Embodiment

[0014] The following further describes the present utility model with reference to the drawings.

[0015] As Figures 1 - 3 shown, a welding fixture for a combustor annular pipe includes a disc 1, a support device, an end positioning plate device, an angle seat device, and a flange support device; the disc 1 is processed from 45# steel, and after processing, the disc is subjected to rust prevention treatment. The inner and outer diameter dimensions of the disc refer to the dimensions of the processed annular pipe. The support device includes a support 2, a positioning block A4, a fixed drill bushing 6, and a cross plate 7; the support 2 is circumferentially fixed on the disc 1 by hexagon head bolts 3; a positioning block A4 is installed on the top of the support 2. When the combustor annular pipe is loaded into the support 2, the positioning block 4 is used to finely adjust its position. After the five-star hand-tightening bolt 5 finely adjusts the annular pipe, the position of the combustor annular pipe is tightened; the cross plate 7 is fixed on the positioning block A4 by welding; the fixed drill bushing 6 is installed on the cross plate 7, and the cross plate 7 is processed with mounting holes. These mounting holes, the fixed drill bushing 6 and the bent handle cylindrical pin 12 are used in cooperation. The fixed drill bushing 6 has two functions. One is to prevent the drill bit from shaking during the processing of the hole in the annular pipe, affecting the dimensional accuracy of the processed hole. The other function is to insert into the inner part of the pipe joint when welding the single-piece pipe joint of the annular pipe, prevent welding deformation, and fix the position of the annular pipe joint.

[0016] The end positioning plate device includes an end positioning plate 8 and a positioning block B9; the end positioning plate 8 is fixed on the disc 1 by hexagon head bolts 3, and the positioning block B9 is used to adjust the position with the end positioning plate 8 by a five-star hand-tightening bolt 5. When the annular pipe is loaded into the annular pipe positioning fixture, the end positioning plate can detect the circumference of the processed annular pipe. When the length of the annular pipe is long, the end positioning plate 8 and the positioning block B9 are used to fix it, and finally a pipe cutting machine is used to process its length.

[0017] The angle seat device includes angle seat A10, positioning block C11 and bent handle cylindrical pin 12; the angle seat A10 is fixed in position with the disc 1 by hexagon head bolt 3; the positioning block C11 and the angle seat A10 are fixed with the bent handle cylindrical pin 12. The upper end of the positioning block C11 is machined with a mounting hole. When welding the annular pipe support, the annular pipe support is inserted into the mounting hole to play a positioning role and prevent movement during the welding process.

[0018] The flange support structure includes angle seat B13, positioning block D14 and bent handle cylindrical pin 12; the angle seat B13 is fixed on the disc 1 by hexagon head bolt 3; the positioning block D14 and the angle seat B13 are fixed with the bent handle cylindrical pin 12. The upper end of the positioning block D14 is machined with a mounting hole. When welding the annular pipe flange, the annular pipe flange is inserted into the mounting hole to play a positioning role and prevent movement during the welding process.

[0019] In order to ensure the machining accuracy, the present utility model has 17 lifting rings 15 installed on the disc 1, with a rated load of 2t, and is connected to the mandrel through pins for convenient transportation.

[0020] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A gas turbine annular pipe welding fixture, characterized in that: It comprises a disc (1), a support device, an end positioning plate device, an angle seat device and a flange support device; the support device comprises a support (2), a positioning block A (4), a fixed drill sleeve (6) and a transverse plate (7); the support (2) is circumferentially fixed on the disc (1); a positioning block A (4) is installed on the top of the support (2); the transverse plate (7) is installed on the positioning block A (4); the fixed drill sleeve (6) is installed on the transverse plate (7); The end positioning plate device comprises an end positioning plate (8) and a positioning block B (9); the end positioning plate (8) is fixed on the disc (1), and the positioning block B (9) is mounted on the end positioning plate (8); The angle seat device comprises an angle seat A (10), a positioning block C (11) and a curved handle cylindrical pin (12); the angle seat A (10) is fixed on the disc (1); the positioning block C (11) and the angle seat A (10) are fixed by the curved handle cylindrical pin (12); The flange support device comprises an angle seat B (13), a positioning block D (14) and a bent-handle cylindrical latch (12); the angle seat B (13) is fixed on the disc (1); the positioning block D (14) and the angle seat B (13) are fixed by the bent-handle cylindrical latch (12).

2. A gas turbine annular pipe welding fixture according to claim 1, characterized in that: The upper end of the positioning block C (11) is provided with a mounting hole.

3. A gas turbine annular pipe welding fixture according to claim 1, characterized in that: The upper end of the positioning block D (14) is provided with a mounting hole.

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