Gate valve shell welding tool

Abstract

The utility model relates to the technical field of shell tools, and provides a gate valve shell welding tool which is used for positioning and welding a shell, the shell comprises end plates and a frame between the end plates, end flanges are arranged on the end plates, and the tool comprises a first positioning piece, a second positioning piece and a third positioning piece. The first positioning piece is positioned on the second positioning piece, the third positioning piece is inserted into the first positioning piece and the second positioning piece in a matched mode, the outer side wall of the first positioning piece is matched with the inner wall of the frame, the second positioning piece abuts against the edge of the frame, and the outer wall of the third positioning piece is matched with the inner wall of the end flange. Through cooperation of the first positioning piece, the second positioning piece and the third positioning piece, accurate positioning of the shell in the welding process can be guaranteed, the shell is not prone to displacement in the welding process, the welding precision is improved, the risk of welding deformation is reduced, the phenomenon that a valve element is stuck in the moving process is avoided, and the moving stability of the valve element is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of housing tooling technology, and more specifically, to a welding tooling for a slide gate valve housing. Background Technology

[0002] Slide gate valves, a common type of vacuum valve, enable changes in airflow direction, regulation of airflow volume, and the shut-off and connection of pipelines. In traditional vacuum applications, valves typically use rubber ring seals, and the compression of the sealing ring is adjusted by controlling the depth of the sealing groove, thereby controlling the valve leakage rate.

[0003] However, the valve core primarily moves by rolling on the inner surface of the housing. This rolling mechanism presents several problems, such as the difficulty in maintaining the flatness of the inner surface, which can cause the valve core to jam during movement. Furthermore, inconsistent welding quality across each housing results in poor overall weld consistency; simultaneously, the lack of effective equipment to control the direction and extent of deformation during welding leads to significant welding deformation issues. This can not only cause the valve core to wobble within the housing, but in severe cases, can even lead to jamming during valve core movement. Utility Model Content

[0004] The purpose of this utility model is to provide a welding fixture for slide gate valve housing, which solves the problem of poor welding accuracy of existing slide gate valve housings.

[0005] This utility model is achieved through the following technical solution: a welding fixture for a slide gate valve housing, used for positioning and welding the housing, the housing including an end plate and a frame between the end plates, an end flange provided on the end plate, the fixture including a first positioning member, a second positioning member and a third positioning member, the first positioning member being positioned on the second positioning member, the third positioning member being inserted into the first positioning member and the second positioning member, the outer wall of the first positioning member cooperating with the inner wall of the frame, the second positioning member abutting against the edge of the frame, and the outer wall of the third positioning member cooperating with the inner wall of the end flange.

[0006] Furthermore, the second positioning element is stepped, including an upper step surface and a lower step surface. The upper step surface contacts the first positioning element, and the edge of the upper step surface is flush with the edge of the first positioning element. The lower step surface contacts the frame, and the edge of the lower step surface is flush with the outer edge of the frame.

[0007] Furthermore, a boss is provided on the end face of the first positioning member, and a groove that mates with the boss is provided on the end face of the second positioning member.

[0008] Furthermore, one side of the first positioning member is provided with a positioning strip that engages with the end of the second positioning member.

[0009] Furthermore, the frame is formed by the side plate, the bottom plate and the long flange. The two sides of the first positioning member are in contact with the side plate, one end of the first positioning member is in contact with the bottom plate, and the other end of the first positioning member extends beyond the long flange.

[0010] Preferably, the first positioning member has a connecting hole at the end extending beyond the flange.

[0011] Furthermore, both the first and second positioning members have positioning holes for connecting to the third positioning member.

[0012] This utility model has at least the following advantages and beneficial effects: the cooperation of the first positioning component, the second positioning component and the third positioning component can ensure the accurate positioning of the shell during the welding process, making it less likely for the shell to shift during the welding process, improving the welding accuracy, reducing the risk of welding deformation, avoiding the jamming of the valve core during the movement, and ensuring the stability of the valve core movement. Attached Figure Description

[0013] Figure 1 This utility model provides a structural schematic diagram of a welding fixture for a gate valve housing.

[0014] Figure 2 A schematic diagram of the structure of the first positioning component in a welding fixture for a gate valve body provided by this utility model.

[0015] Figure 3 A schematic diagram of the structure of the second positioning component in a welding fixture for a gate valve body provided by this utility model.

[0016] Figure 4 A schematic diagram of the structure of the third positioning component in a welding fixture for a gate valve body provided by this utility model.

[0017] Figure 5 This is a schematic diagram of the first step of welding in this utility model.

[0018] Figure 6 This is a schematic diagram of the second welding step in this utility model.

[0019] Figure 7 This is a schematic diagram of the third step of welding in this utility model.

[0020] Figure 8 This is a schematic diagram of the fourth step of welding in this utility model.

[0021] Figure 9 This is a schematic diagram of the shell structure in this utility model.

[0022] Reference numerals: 1-shell, 11-end plate, 111-end flange, 112-reinforcing rib, 12-frame, 121-side plate, 122-bottom plate, 123-long flange, 2-first positioning element, 20-connecting hole, 21-bore, 22-positioning strip, 3-second positioning element, 30-groove, 31-upper step surface, 32-lower step surface, 4-third positioning element. Detailed Implementation

[0023] The specific implementation method is described below with reference to the accompanying drawings.

[0024] Example

[0025] like Figures 1 to 9 As shown, this embodiment mainly discloses a welding fixture for a slide gate valve housing 1, used for positioning and welding the housing 1. The housing 1 includes an end plate 11 and a frame 12 between the end plates 11. An end flange 111 is provided on the end plate 11. The fixture includes a first positioning member 2, a second positioning member 3, and a third positioning member 4. The first positioning member 2 is positioned on the second positioning member 3, and the third positioning member 4 is inserted into the first positioning member 2 and the second positioning member 3. The outer wall of the first positioning member 2 mates with the inner wall of the frame 12, the second positioning member 3 abuts against the edge of the frame 12, and the outer wall of the third positioning member 4 mates with the inner wall of the end flange 111. Specifically, the first positioning member 2 and the second positioning member 3 are both plate-shaped structures, while the third positioning member 4 is a cylindrical plug structure.

[0026] The steps for welding housing 1 using this tooling are as follows:

[0027] Step 1, such as Figure 5 As shown, end plates 11 at both ends are welded together. The position of the end flange 111 is determined by concentric positioning between the inner wall of the end flange 111 and the through holes opened on the end plate 11. In addition, a reinforcing rib 112 is usually connected to the end plate 11. The reinforcing rib 112 and the end flange 111 are positioned and clamped, and then welded. The end flange 111 and the end plate 11 are internally welded.

[0028] Step 2, as follows Figure 6 As shown, the welding frame 12 is performed by positioning the first positioning member 2 on the second positioning member 3 to position and clamp the frame 12, and then welding is performed.

[0029] Step 3, as follows Figure 7 As shown, the frame 12 is welded to one of the end plates 11, the third positioning fit is inserted into the first positioning part 2 and the second positioning part 3, the end plate 11 welded in step one is placed on the first positioning part 2, so that the inner surface of the housing 1 is in close contact with the upper surface of the first positioning part 2, and the gap at the connection between the frame 12 and the end plate 11 is welded by the fit between the third positioning part 4 and the end flange 111, and the alignment of the end plate 11 with the edge of the frame 12.

[0030] Step 4, such as Figure 8 As shown, weld another end plate 11, remove the second positioning block, flip the workpiece, place the other welded end plate 11 from step one on the first positioning component 2, and weld the gap at the connection.

[0031] The cooperation of the first positioning element 2, the second positioning element 3 and the third positioning element 4 can ensure the accurate positioning of the housing 1 during the welding process, making it less likely for the housing 1 to shift during the welding process, improving the welding accuracy, reducing the risk of welding deformation, and avoiding the phenomenon of valve core jamming during the movement.

[0032] Furthermore, in specific implementation, such as Figure 1 , Figure 3 As shown, the second positioning member 3 provided in this embodiment of the present invention is stepped, including an upper stepped surface 31 and a lower stepped surface 32. The upper stepped surface 31 contacts the first positioning member 2, and the edge of the upper stepped surface 31 is flush with the edge of the first positioning member 2. The lower stepped surface 32 contacts the frame 12, and the edge of the lower stepped surface 32 is flush with the outer edge of the frame 12. Specifically, the upper stepped surface 31 can be in close contact with the first positioning member 2, ensuring the positioning connection between the first positioning member 2 and the second positioning member 3; while the design of the lower stepped surface 32 ensures precise docking with the frame 12, which helps to stabilize the position of the housing 1 and enhances the overall stability and accuracy.

[0033] Furthermore, in specific implementation, such as Figures 1-3 As shown, a boss 21 is provided on the end face of the first positioning member 2 provided in this embodiment of the utility model, and a groove 30 that mates with the boss 21 is provided on the end face of the second positioning member 3. Specifically, the first positioning member 2 may have a boss 21 machined on both end faces, or it may have a boss 21 machined on one side. The cooperation between the boss 21 and the groove 30 effectively prevents misalignment of the components during the welding process, which helps to maintain the stability and accuracy during welding.

[0034] Furthermore, in specific implementation, such as Figure 1 , Figure 2 As shown, the first positioning member 2 provided in this embodiment of the present invention has a positioning strip 22 on one side that engages with the end of the second positioning member 3. This further enhances the overall connection stability, prevents the movement and detachment of components during welding, and improves the welding effect.

[0035] Furthermore, in specific implementation, such as Figure 6As shown, the frame 12 provided in this embodiment of the present invention is formed by a side plate 121, a bottom plate 122, and a long flange 123. The first positioning member 2 contacts the side plate 121 on both sides, one end of the first positioning member 2 contacts the bottom plate 122, and the other end of the first positioning member 2 extends beyond the long flange 123. This facilitates the removal of the first positioning member 2 after the housing 1 is welded. Preferably, a connecting hole 20 is provided at the end of the first positioning member 2 extending beyond the long flange 123. This hole can be used to connect external tools, such as bolt handles, for quick removal of the first positioning member 2.

[0036] Furthermore, in specific implementation, such as Figure 2 , Figure 3 As shown, both the first positioning member 2 and the second positioning member 3 provided in this embodiment of the present invention have positioning holes for connecting to the third positioning member 4. The positioning holes of the first positioning member 2 and the second positioning member 3 have the same diameter, ensuring that the positioning holes are flush and aligned when the first positioning member 2 and the second positioning member 3 are positioned and connected.

Claims

1. A plug-in valve housing welding tool for positioning and welding a housing (1) comprising end plates (11) and a frame (12) between the end plates (11), the end plates (11) being provided with end flanges (111), characterized in that, The tool includes a first positioning member (2), a second positioning member (3) and a third positioning member (4), the first positioning member (2) is positioned on the second positioning member (3), the third positioning member (4) is fitted into the first positioning member (2) and the second positioning member (3), the outer wall of the first positioning member (2) is matched with the inner wall of the frame (12), the second positioning member (3) is abutted with the edge of the frame (12), and the outer wall of the third positioning member (4) is matched with the inner wall of the end flange (111).

2. The plug valve housing welding fixture of claim 1, wherein, The second positioning member (3) is in a stepped shape and includes an upper step surface (31) and a lower step surface (32), the upper step surface (31) is in contact with the first positioning member (2), and the edge of the upper step surface (31) is matched with the edge of the first positioning member (2) to be flush, the lower step surface (32) is in contact with the frame (12), and the edge of the lower step surface (32) is matched with the outer edge of the frame (12) to be flush.

3. The plug valve housing welding fixture of claim 1, wherein, A boss (21) is arranged on the end surface of the first positioning member (2), and a groove (30) matched with the boss (21) is arranged on the end surface of the second positioning member (3).

4. The plug valve housing welding fixture of claim 1, wherein, One side of the first positioning member (2) is provided with a positioning strip (22) for clamping the end of the second positioning member (3).

5. The plug valve housing welding fixture of claim 1, wherein, The frame (12) is formed by a side plate (121), a bottom plate (122) and a long method flange (123), the two sides of the first positioning member (2) are in contact with the side plate (121), one end of the first positioning member (2) is in contact with the bottom plate (122), and the other end of the first positioning member (2) exceeds the long method flange (123).

6. A plug valve housing welding fixture according to claim 5, wherein A connecting hole (20) is arranged at one end of the first positioning member (2) exceeding the long method flange (123).

7. The plug valve housing welding fixture of claim 1, wherein, The first positioning member (2) and the second positioning member (3) are both provided with positioning holes for connecting the third positioning member (4). The first positioning member (2) and the second positioning member (3) are both provided with positioning holes for connecting the third positioning member (4).

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