Welding fixture for switching type wall-embedded valve

Abstract

The welding clamp comprises a supporting plate, a clamping assembly is arranged on the front end face of the supporting plate, the clamping assembly comprises a first clamping piece and a second clamping piece which are symmetrically arranged left and right, the top end of the first clamping piece is obliquely arranged towards the lower right portion, and the top end of the second clamping piece is obliquely arranged towards the lower left portion; a first clamping groove and a second clamping groove are formed in the top end of the first clamping piece and the top end of the second clamping piece in a sunken mode correspondingly, so that the first clamping groove and the second clamping groove form a set of V-shaped grooves. When the switching type wall-buried valve is installed on the clamping assembly, the lower end of the first base foot is connected to the first clamping groove in a clamped mode, and the lower end of the second base foot is connected to the second clamping groove in a clamped mode, so that the switching type wall-buried valve cannot move in the horizontal direction relative to the clamping assembly and is connected to the clamping assembly in a clamped mode through the gravity of the switching type wall-buried valve. According to the welding clamp for the switching type wall-embedded valve, the switching type wall-embedded valve can be stably clamped, and mounting and dismounting are very convenient.

Description

Technical Field

[0001] The utility model generally relates to the technical field of welding, and in particular to a welding fixture for a switchable buried wall valve. Background Art

[0002] Welding is a manufacturing process and technology that uses heating, high temperature or high pressure to join metals or other thermoplastic materials such as plastics. During the welding process, in order to position the workpiece and improve the accuracy and quality of welding, it is necessary to use welding fixtures to fix the workpiece.

[0003] Traditional welding fixtures are usually plate-shaped structures with a number of threaded holes on their surfaces. When processing a workpiece with threaded holes, the workpiece can be directly screwed onto the welding fixture to fix the workpiece.

[0004] As attached Figure 2 As shown, there is a switchable buried wall valve in the prior art, which includes a tubular main body 210, an inclined portion 220 protruding to the right from the bottom of the main body 210, and a pipe 230 is hollowly arranged inside the main body 210 and the inclined portion 220; base feet are arranged on the four corners of the switchable buried wall valve 2, including a first base foot 211 and a second base foot 212 located on the left and right sides of the top of the main body 210, a third base foot 213 located on the left side of the bottom of the main body 210, and a fourth base foot 214 located on the right side of the inclined portion 220; the bottom ends of the first base foot 211 and the second base foot 212 are both inclined surfaces, and the combination of the two inclined surfaces of the first base foot 211 and the second base foot 212 presents a V-shaped structure; during the processing of the switchable buried wall valve 2, a plug needs to be welded at the pipe mouth of the pipe 230 located at the top of the main body 210.

[0005] For the switchable embedded wall valve 2, if the above-mentioned traditional welding fixture is used, the following problems exist: when fixing the switchable embedded wall valve 2 to the welding fixture, the first base foot 211 and the second base foot 212 need to be screwed to the welding fixture, but since the first base foot 211 and the second base foot 212 are close to the pipe 230 on the main body 210, the threads on the bolts are easily burned and deformed under the influence of the high temperature of the welding gun, resulting in the switchable embedded wall valve 2 being unable to be smoothly removed from the welding fixture; and the bolts need to be repeatedly tightened during the installation and disassembly of the switchable embedded wall valve 2, which also makes the installation and disassembly operations of the switchable embedded wall valve more cumbersome. Summary of the invention

[0006] In view of the above-mentioned defects or shortcomings in the prior art, it is desired to provide a welding clamp for a switchable embedded wall valve, by tilting the first clamping groove and the second clamping groove to be set as a V-shaped groove, so that the shape of the clamping assembly can be embedded in the structure on both sides of the main body of the switchable embedded wall valve, and the two sides of the main body are abutted by the V-shaped groove to maintain a vertical state, and are fixed in the horizontal direction and cannot move; and the switchable embedded wall valve has a tendency to slide downward along the inclined surfaces of the first clamping groove and the second clamping groove under the influence of its own gravity, so that the switchable embedded wall valve is not easy to shake, so that the welding clamp can stably clamp the switchable embedded wall valve; and, the switching embedded wall valve can be loaded and unloaded only by vertically inserting or pulling out the switching embedded wall valve relative to the first clamping groove and the second clamping groove, which greatly improves the convenience of loading and unloading operations of the switchable embedded wall valve.

[0007] The effect of the utility model is achieved in this way:

[0008] A welding fixture for a switchable buried wall valve comprises a support plate, a clamping assembly is arranged on the front end surface of the support plate, the clamping assembly is configured to clamp the switchable buried wall valve, the clamping assembly comprises a first clamping member and a second clamping member which are arranged symmetrically on the left and right, the top end of the first clamping member is inclined toward the lower right, the top end of the second clamping member is inclined toward the lower left, and the top ends of the first clamping member and the second clamping member are respectively recessed with a first clamping groove and a second clamping groove, so that the first clamping groove and the second clamping groove form a group of V-shaped grooves; when the switchable buried wall valve is installed on the clamping assembly, the lower end of the first base foot is clamped in the first clamping groove, and the lower end of the second base foot is clamped in the second clamping groove, because the bottom surfaces of the first base foot and the second base foot are also inclined in a V shape, so that when the first base foot and the second base foot are clamped in the first clamping groove and the second clamping groove, the switchable buried wall valve cannot move in the horizontal direction relative to the clamping assembly, and the switchable buried wall valve is clamped in the clamping assembly by its own gravity.

[0009] Furthermore, the clamping assembly further includes a positioning member, and at least one positioning member is provided on the front end surface of the support plate. When the switchable embedded wall valve is clamped to the clamping assembly, the positioning member abuts against the inclined portion, so that the main body is kept in a vertical state. The positioning member supports to prevent the switchable embedded wall valve from being offset due to the imbalance of left and right weights, so that the main body can be kept in a vertical state.

[0010] Furthermore, the clamping assembly has only one positioning member, and the positioning member is arranged below the first clamping member. The switchable embedded wall valve has a tendency to move to the left, and the displacement can be effectively prevented by only arranging a positioning member support on the left side of the switchable embedded wall valve, which not only saves the manufacturing cost of the welding fixture, but also reduces the overall weight of the welding fixture.

[0011] Further, according to the welding fixture for the switchable embedded wall valve of the claim, the right side wall of the positioning member is tilted toward the lower right, and the right side wall of the positioning member is configured to abut against the lower left corner of the switchable embedded wall valve so that the center line of the main body and the center line of the support plate remain coincident, so that the third base foot can abut against the positioning member more naturally and stably, and ensure that the main body remains in a vertical state.

[0012] Furthermore, the first clamping groove has an inclination angle of 10-40° relative to the horizontal plane, and the second clamping groove has an inclination angle of 20-50° relative to the horizontal plane. The inclination angles of the first clamping groove and the second clamping groove are consistent with the inclination angles of the first base foot and the second base foot, so that the switchable embedded wall valve can be more stably clamped to the clamping assembly and is not prone to shaking.

[0013] Furthermore, the cross-sections of the first clamping groove and the second clamping groove are L-shaped, so that when the switchable embedded wall valve is clamped to the clamping assembly, the bottom surface of the switchable embedded wall valve can be closely attached to the front end surface of the support plate, so that the switchable embedded wall valve will not rock back and forth relative to the support plate, further improving the stability of the connection between the switchable embedded wall valve and the clamping assembly.

[0014] Furthermore, the top of the support plate is inwardly recessed to form a U-shaped groove, so that the pipe at the upper end of the main body is exposed from the support plate, so that multiple welding guns can be evenly arranged around the pipe for welding.

[0015] Furthermore, a heat dissipation port is hollowed out in the middle of the support plate, and the upper end of the heat dissipation port and the lower end of the U-shaped groove are separated by a stopper, so that the support plate can dissipate heat and the weight of the welding fixture as a whole can be reduced.

[0016] Furthermore, two first threaded holes are provided at the lower part of the front end surface of the support plate, and the support plate is threadedly connected to the servo moving block on the machine tool through the first threaded holes, so that the welding fixture can automatically move in and out of the welding operation along with the servo mechanism, thereby improving the convenience of the welding operation.

[0017] Furthermore, a connecting groove is recessed inwardly at the lower portion of the front end surface of the support plate, and a first threaded hole is arranged in the connecting groove. The connecting groove is used to abut the servo moving block. By clamping the servo moving block in the connecting groove, the connection between the servo moving block and the support plate is made more stable.

[0018] The welding fixture for the switchable embedded wall valve provided by the present application, by tilting the first clamping groove and the second clamping groove to be a V-shaped groove, makes the shape of the clamping assembly able to fit into the V-shaped structure formed by the lower end combination of the first base foot and the second base foot on the switchable embedded wall valve, so that when the switchable embedded wall valve is clamped into the clamping assembly, the two sides of the main body are abutted by the V-shaped grooves to maintain a vertical state, and are fixed and cannot move in the horizontal direction; and the switchable embedded wall valve has a tendency to slide downward along the inclined surfaces of the first clamping groove and the second clamping groove under the influence of its own gravity, so that the switchable embedded wall valve is not easy to shake, so that the welding fixture can stably clamp the switchable embedded wall valve; and the switchable embedded wall valve can move in the vertical direction relative to the clamping assembly, so that when loading and unloading the switchable embedded wall valve, it is only necessary to insert or pull out the first base foot and the second base foot relative to the first clamping groove and the second clamping groove to complete the loading and unloading of the switchable embedded wall valve, which greatly improves the convenience of loading and unloading operations of the switchable embedded wall valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a welding fixture provided in an embodiment of the present application clamping a switchable embedded wall valve;

[0021] Figure 2 A schematic diagram of the three-dimensional structure of a switchable buried wall valve provided in an embodiment of the present application;

[0022] Figure 3 A right-side structural diagram of a switchable buried wall valve provided in an embodiment of the present application

[0023] Figure 4 A schematic diagram of the three-dimensional structure of a welding fixture provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the front structure of the support plate provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the back structure of the first clamping member and the second clamping member provided in an embodiment of the present application;

[0026] Figure 7 A schematic side view of the first clamping member provided in an embodiment of the present application;

[0027] Figure 8 A schematic side view of the second clamping member provided in an embodiment of the present application;

[0028] Fig. 9 A schematic diagram of the three-dimensional structure of the positioning member provided in an embodiment of the present application.

[0029] The figures are marked as follows: 1-support plate, 110-first clamping member, 111-first clamping groove, 112-second threaded hole, 120-second clamping member, 121-second clamping groove, 122-third threaded hole, 130-positioning member, 131-fourth threaded hole, 140-U-shaped groove, 141-stop member, 150-heat dissipation port, 161-first threaded hole, 160-connecting groove, 2-switchable embedded wall valve, 210-main body, 211-first base foot, 212-second base foot, 213-third base foot, 214-fourth base foot, 220-inclined portion, 230-pipeline. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0031] Please refer to the attached Figure 1-8 The embodiment of the present application provides a welding fixture for a switchable buried wall valve, including a support plate 1, a clamping assembly is arranged on the front end surface of the support plate 1, and the clamping assembly is configured to clamp the switchable buried wall valve 2, and the clamping assembly includes a first clamping member 110 and a second clamping member 120 which are arranged symmetrically on the left and right. The top end of the first clamping member 110 is inclined toward the lower right, and the top end of the second clamping member 120 is inclined toward the lower left, and the top ends of the first clamping member 110 and the second clamping member 120 are respectively recessed with a first clamping groove 111 and a second clamping groove 121, so that the first clamping groove 111 and the second clamping groove 121 are respectively recessed with the first clamping groove 111 and the second clamping groove 121. The holding groove 121 forms a group of V-shaped grooves; when the switchable embedded wall valve 2 is installed on the clamping assembly, the lower end of the first base foot 211 is clamped in the first clamping groove 111, and the lower end of the second base foot 212 is clamped in the second clamping groove 121. Since the lower ends of the first base foot 211 and the second base foot 212 are also inclined in a V shape, when the first base foot 211 and the second base foot 212 are clamped in the first clamping groove 111 and the second clamping groove 121, the switchable embedded wall valve 2 cannot move horizontally relative to the clamping assembly, and the switchable embedded wall valve 2 is clamped in the clamping assembly by its own gravity.

[0032] In this embodiment, the first clamping groove 111 and the second clamping groove 121 are tilted to form a V-shaped groove, so that the shape of the clamping assembly can fit into the V-shaped structure formed by the combination of the lower end inclined surfaces of the first base foot 211 and the second base foot 212 on the switchable embedded wall valve 2, so that when the switchable embedded wall valve 2 is inserted into the clamping assembly, the two sides of the main body 210 are abutted by the V-shaped grooves to maintain a vertical state, and are fixed in the horizontal direction and cannot move; and the switchable embedded wall valve 2 has a structure along the first clamping groove 111 and the second clamping groove 121 under the influence of its own gravity. The tendency of the inclined surface of the second clamping groove 121 to slide downward makes the switch type buried wall valve 2 less likely to shake, so that the welding fixture can stably clamp the switch type buried wall valve 2; and, the switch type buried wall valve 2 can move in the vertical direction relative to the clamping assembly, so that when loading and unloading the switch type buried wall valve 2, it is only necessary to insert or pull out the first base foot 211 and the second base foot 212 relative to the first clamping groove 111 and the second clamping groove 121 to complete the loading and unloading of the switch type buried wall valve 2, thereby greatly improving the convenience of loading and unloading operations of the switch type buried wall valve 2.

[0033] Among them, two second threaded holes 112 are provided on the first clamping member 110, and the first clamping member 110 is screwed to the support plate 1 through the second threaded holes 112; two third threaded holes 122 are provided on the second clamping member 120, and the second clamping member 120 is screwed to the support plate 1 through the third threaded holes 122; thus, the first clamping member 110 and the second clamping member 120 are both fixed to the support plate 1 by threaded connection, which ensures a stable connection and facilitates the loading and unloading of the first clamping member 110 and the second clamping member 120.

[0034] In some embodiments of the present application, the clamping assembly also includes a positioning member 130, and at least one positioning member 130 is provided on the front end face of the support plate 1. When the switchable embedded wall valve 2 is clamped in the clamping assembly, the positioning member 130 abuts against the inclined portion 220, so that the main body 210 remains in a vertical state.

[0035] In this embodiment, since the inclined portion 220 is inclined relative to the main body 210, after the switchable embedded wall valve 2 is vertically inserted into the clamping assembly, the weight on the left and right sides of the switchable embedded wall valve 2 is unbalanced, and the main body 210 is easily offset, causing the pipe mouth of the top pipe 230 of the main body 210 to be tilted, thereby resulting in the molten welding wire being unable to fully fill the weld during welding; the inclined portion 220 is abutted against the positioning member 130, and the inclined portion 220 is supported by the positioning member 130 and will not be offset, so that the main body 210 can also maintain a vertical state.

[0036] The positioning member 130 has two fourth threaded holes 131 , and the positioning member 130 is screwed and fixed to the support plate 1 through the fourth threaded holes 131 , which ensures a stable connection between the two and facilitates the installation and removal of the positioning member 130 .

[0037] In some embodiments of the present application, the clamping assembly has only one positioning member 130 , and the positioning member 130 is disposed below the first clamping member 110 .

[0038] In this embodiment, since the inclined portion 220 is inclined to the right relative to the main body 210, when the main body 210 remains in a vertical state, the weight of the right side of the switch type buried wall valve 2 as a whole is heavier. In order to maintain balance, the switch type buried wall valve 2 has a tendency to move to the left side; therefore, only by setting a positioning member 130 under the first clamping member 110, when the switch type buried wall valve 2 is installed on the welding fixture, the left side of the switch type buried wall valve 2 is supported by the positioning member 130, which can effectively prevent the switch type buried wall valve 2 from deviating to the left side, so that the main body 210 remains in a vertical state, which not only saves the manufacturing cost of the welding fixture, but also reduces the overall weight of the welding fixture.

[0039] In some embodiments of the present application, the right side wall of the positioning member 130 is tilted toward the lower right side, and the right side wall of the positioning member 130 is configured to keep the center line of the main body 210 coincident with the center line of the support plate 1. When the switchable embedded wall valve 2 is installed on the welding fixture, the third base foot 213 located on the left side of the bottom of the switchable embedded wall valve 2 abuts against the right side wall of the positioning member 130. Since the right side wall of the positioning member 130 is tilted, the third base foot 213 is not easy to slide on the side wall when abutting, so that the third base foot 213 can abut against the positioning member 130 more naturally and stably.

[0040] In some embodiments of the present application, the first clamping groove 111 has an inclination angle of 10-40° relative to the horizontal plane, and the second clamping groove 121 has an inclination angle of 20-50° relative to the horizontal plane. The inclination angles of the first clamping groove 111 and the second clamping groove 121 are consistent with the inclination angles of the first base foot 211 and the second base foot 212, so that the shape of the V-shaped groove fits the shape of the left and right base feet of the main body 210, thereby enabling the switchable embedded wall valve 2 to be more stably clamped to the clamping assembly and not easily shaken.

[0041] In some embodiments of the present application, the cross-sections of the first clamping groove 111 and the second clamping groove 121 are L-shaped, so that when the switchable embedded wall valve 2 is clamped to the clamping assembly, the bottom surface of the switchable embedded wall valve 2 can be closely attached to the front end surface of the support plate 1. This prevents the switchable embedded wall valve 2 from shaking back and forth relative to the support plate 1, further improving the stability of the connection between the switchable embedded wall valve 2 and the clamping assembly.

[0042] In some embodiments of the present application, the top of the support plate 1 is recessed inward to form a U-shaped groove 140 .

[0043] In this embodiment, in order to ensure uniform welding, 7 welding guns need to be used to evenly arrange them around the pipe 230 at the upper end of the main body 210 when welding the switchable embedded wall valve 2, and welding is performed simultaneously, so it is necessary to avoid the welding guns being blocked by the support plate 1; by recessing a U-shaped groove 140 at the top of the support plate 1, the pipe 230 at the upper end of the main body 210 is exposed to the support plate 1, so that multiple welding guns can be evenly arranged around the pipe 230 for welding, effectively avoiding problems such as overburning of the front end, overheating and burning of the threads, and cold welding at the rear end due to inconsistent coverage of the front and rear flames.

[0044] In some embodiments of the present application, a heat dissipation port 150 is hollowed out in the middle of the support plate 1 , and an upper end of the heat dissipation port 150 and a lower end of the U-shaped groove 140 are separated by a stopper 141 .

[0045] In this embodiment, by providing a heat dissipation port 150, the heat generated during the welding of the switchable embedded wall valve 2 can be dissipated through the heat dissipation port 150, effectively avoiding deformation of the middle part of the support plate 1 due to overheating of the switchable embedded wall valve 2; and, after the support plate 1 is hollowed out, the weight of the entire welding fixture can be reduced, thereby reducing the load on the machine tool.

[0046] During the welding process, the material of the welding fixture becomes soft under the action of high temperature. Since the overall weight of the switchable embedded wall valve 2 is heavy, the left and right sides of the slot on the welding fixture are thin and have low strength, and are easily deformed by pressure. Therefore, the heat dissipation port 150 and the U-shaped slot 140 are separated by a stopper 141, and the two ends of the stopper 141 are connected to the left and right sides of the slot of the support plate 1, thereby strengthening the support plate 1 and preventing it from deforming after being heated.

[0047] In some embodiments of the present application, two first threaded holes 161 are provided at the lower portion of the front end surface of the support plate 1, and the support plate 1 is threadedly connected to the servo moving block on the machine tool through the first threaded holes 161. By connecting the support plate 1 to the servo moving block of the machine tool, the welding fixture can automatically enter and exit the welding operation with the servo mechanism, thereby improving the convenience of the welding operation; and the support plate 1 and the servo moving block are fixed by threaded connection, which is stable and convenient for loading and unloading the welding fixture.

[0048] In some embodiments of the present application, the lower portion of the front end surface of the support plate 1 is indented inward to form a connection groove 160, and the first threaded hole 161 is provided in the connection groove 160, and the connection groove 160 is used to abut against the servo moving block. By clamping the servo moving block in the connection groove 160, the connection between the servo moving block and the support plate 1 is made more stable, and the welding fixture is prevented from falling off from the servo moving block due to unstable connection.

[0049] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means more than three.

[0050] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A welding fixture for a switchable buried wall valve, characterized in that: The invention comprises a support plate (1), a clamping assembly is arranged on the front end surface of the support plate (1), the clamping assembly is configured to clamp a switchable embedded wall valve (2), the clamping assembly comprises a first clamping member (110) and a second clamping member (120) which are arranged symmetrically on the left and right, the top end of the first clamping member (110) is arranged tilted toward the lower right, the top end of the second clamping member (120) is arranged tilted toward the lower left, and the top ends of the first clamping member (110) and the second clamping member (120) are respectively recessed with a first clamping groove (111) and a second clamping groove (121), so that the first clamping groove (111) and the second clamping groove (121) form a group of V-shaped grooves; when the When the switchable embedded wall valve (2) is installed on the clamping assembly, the lower end of the first base foot (211) is clamped in the first clamping groove (111), and the lower end of the second base foot (212) is clamped in the second clamping groove (121). Since the bottom surfaces of the first base foot (211) and the second base foot (212) are also inclined in a V shape, when the first base foot (211) and the second base foot (212) are clamped in the first clamping groove (111) and the second clamping groove (121), the switchable embedded wall valve (2) cannot move in the horizontal direction relative to the clamping assembly, and the switchable embedded wall valve (2) is clamped in the clamping assembly by its own gravity.

2. The welding fixture for the switchable buried wall valve according to claim 1 is characterized in that: The clamping assembly further comprises a positioning member (130), and the front end surface of the support plate (1) is provided with at least one positioning member (130). When the switchable embedded wall valve (2) is clamped to the clamping assembly, the positioning member (130) abuts against the inclined portion (220), so that the main body (210) remains in a vertical state.

3. The welding fixture for the switchable buried wall valve according to claim 2 is characterized in that: The clamping assembly has only one positioning member (130), and the positioning member (130) is arranged below the first clamping member (110).

4. The welding fixture for the switchable buried wall valve according to claim 3 is characterized in that: The right side wall of the positioning member (130) is arranged to be inclined toward the lower right, and the right side wall of the positioning member (130) is configured to abut against the lower left corner of the switchable embedded wall valve so that the center line of the main body (210) and the center line of the support plate (1) remain coincident.

5. The welding fixture for a switchable embedded wall valve according to claim 1, characterized in that: The inclination angle of the first clamping groove (111) relative to the horizontal plane is 10-40°, and the inclination angle of the second clamping groove (121) relative to the horizontal plane is 20-50°.

6. The welding fixture for a switchable buried wall valve according to claim 1, characterized in that: The cross-sections of the first clamping groove (111) and the second clamping groove (121) are L-shaped, so that when the switchable embedded wall valve (2) is clamped to the clamping assembly, the bottom surface of the switchable embedded wall valve (2) can be closely attached to the front end surface of the support plate (1).

7. The welding fixture for a switchable buried wall valve according to claim 1, characterized in that: The top end of the support plate (1) is recessed inwards to form a U-shaped groove (140).

8. The welding fixture for a switchable buried wall valve according to claim 7, characterized in that: The middle part of the support plate (1) is hollowed out to provide a heat dissipation opening (150), and the upper end of the heat dissipation opening (150) and the lower end of the U-shaped groove (140) are separated by a stopper (141).

9. The welding fixture for a switchable embedded wall valve according to claim 1, characterized in that: Two first threaded holes (161) are provided at the lower part of the front end surface of the support plate (1), and the support plate (1) is threadedly connected to a servo moving block on a machine tool via the first threaded holes (161).

10. The welding fixture for a switchable embedded wall valve according to claim 9, characterized in that: The lower part of the front end surface of the support plate (1) is recessed inwardly to form a connecting groove (160), the first threaded hole (161) is arranged in the connecting groove (160), and the connecting groove (160) is used to abut against the servo moving block.

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