A valve body welding positioning fixture

Abstract

This invention relates to the field of valve welding technology, specifically a valve body welding positioning fixture, including a support assembly for placing the valve body. The support assembly has an inner positioning assembly for positioning the inner side of the valve body and an outer positioning assembly for positioning the outer side of the valve body. The support assembly also has a pressing assembly corresponding to the valve body. The valve body's own weight presses down on the pressing assembly, simultaneously driving the inner and outer positioning assemblies to move towards the center of the valve body. This inner and outer compression achieves precise radial positioning of the valve body, avoiding repeated manual adjustments and eliminating measurement errors. Simultaneously, as the inner and outer positioning assemblies move, the transmission assembly hydraulically drives a support conveying assembly to press the valve body support to the outer side of the valve body, achieving automatic pre-welding alignment. This allows for simultaneous positioning of two sets of valve body supports, improving efficiency.

Description

Technical Field

[0001] This invention relates to the field of valve welding technology, and more specifically to a valve body welding positioning fixture. Background Technology

[0002] In industrial fluid control systems, the valve body is a key component for controlling fluid flow rate and direction. Its installation stability has a significant impact on the reliability of system operation. To ensure the stability of the valve body during use, it is usually necessary to weld a bracket to the outside of the valve body to provide stable support.

[0003] Currently, the welding process of valve body supports mostly relies on manual operation. That is, the operator first aligns the support with the valve body and then performs the welding operation. This traditional welding method has significant drawbacks. On the one hand, due to the lack of precise positioning auxiliary tools, the operator needs to repeatedly calibrate the relative position of the support and the valve body based on experience during the alignment process to meet the welding requirements. This process not only consumes a lot of time and manpower, but also makes the position adjustment difficult. On the other hand, the operator not only has to weld each one, but also needs to repeatedly calibrate the distance, angle and other parameters of the two sets of legs with measuring tools to ensure their symmetrical setting. It is difficult to achieve fast and accurate positioning, resulting in low welding efficiency. Therefore, a valve body welding positioning fixture is proposed to facilitate the rapid positioning of valve body supports and improve production efficiency. Summary of the Invention

[0004] To address the problems in the prior art, this invention provides a valve body welding positioning fixture, which facilitates rapid positioning of the valve body bracket and improves production efficiency.

[0005] The technical solution adopted by the present invention to solve its technical problem is a valve body welding positioning fixture, including a support assembly for placing the valve body. The support assembly is provided with an inner positioning assembly for positioning the inner side of the valve body and an outer positioning assembly for positioning the outer side of the valve body. The support assembly is provided with a pressing assembly corresponding to the valve body. When the pressing assembly is pressed down by the valve body, it drives the inner positioning assembly and the outer positioning assembly to move closer together. The outer positioning assembly is provided with a bracket conveying assembly for supporting the valve body bracket to be welded. A transmission assembly is provided between the inner positioning assembly and the outer positioning assembly. When the inner positioning assembly and the outer positioning assembly move closer together, the transmission assembly drives the bracket conveying assembly to press the valve body bracket towards one side of the valve body.

[0006] Specifically, the inner positioning component includes a first mounting frame, on both sides of which a vertically arranged first positioning roller is mounted, and a first support member is provided on one side of the first mounting frame; the outer positioning component includes a second mounting frame, on both sides of which a vertically arranged second positioning roller is mounted, and a second support member is provided on the side of the second mounting frame away from the first mounting frame.

[0007] A first pneumatic telescopic rod is fixedly connected to the side of the first support member away from the first positioning roller, and a second pneumatic telescopic rod is fixedly connected to the side of the second support member away from the second positioning roller. A horizontally arranged support base is provided below the support assembly. The fixed ends of the first and second pneumatic telescopic rods are both fixedly connected to the upper surface of the support base through vertically arranged connecting rods.

[0008] Specifically, the pressing component includes an arc-shaped frame fixedly connected to the support component and with its opening facing upward. A squeezing block is slidably connected inside the arc-shaped frame. An air storage cushion is provided between the squeezing block and the inner side of the arc-shaped frame. The fixed ends of the first and second pneumatic telescopic rods are both connected to air inlet connectors. The air storage cushion is connected to the air inlet connectors through a pipeline.

[0009] Specifically, the support conveying assembly includes trays symmetrically arranged on both sides of the second mounting frame. Each tray is fixedly connected to a horizontally arranged first hydraulic telescopic rod. The output end of the first hydraulic telescopic rod is fixedly connected to a vertically arranged conveying plate. A magnet is provided on the side of the conveying plate near the first hydraulic telescopic rod. Several sets of circumferentially distributed conical blocks are fixedly connected to the magnet.

[0010] Specifically, the transmission assembly includes mounting plates respectively disposed on one side of the first mounting frame and the second mounting frame, a second hydraulic telescopic rod is fixedly connected between the two sets of mounting plates, and a return spring is fixedly connected between the output end of the second hydraulic telescopic rod and the mounting plate;

[0011] One side of the support plate is provided with a first connector that communicates with the first hydraulic telescopic rod, and one side of the mounting plate is provided with a second connector that communicates with the fixed end of the second hydraulic telescopic rod. The second connector is connected to the first connector through a pipeline.

[0012] Specifically, the outer positioning component is provided with symmetrically arranged cleaning components on both sides. The cleaning components include elastic hinge seats symmetrically arranged on the outside of the second mounting frame. A third pneumatic telescopic rod is hinged to the elastic hinge seat and the fixed end of the third pneumatic telescopic rod is connected to the air storage pad through a pipeline and an exhaust valve.

[0013] The output end of the third pneumatic telescopic rod is provided with a vertically arranged cleaning block. The output end of the third pneumatic telescopic rod is fixedly connected with two sets of vertically arranged positioning rods. The upper end of the positioning rod passes through the cleaning block and is slidably connected to the cleaning block. The upper end of the positioning rod is provided with a limiting plate. The cleaning block is provided with a wedge-shaped extrusion surface at the upper and lower corners near the valve body.

[0014] Specifically, the support assembly includes a horizontally arranged first support ring and a second support ring, with the second support ring located inside the first support ring. Both the first and second support rings have notches. The two ends of the first and second support rings are fixedly connected to the two sides of the arc-shaped frame. The first and second support rings are provided with several sets of circumferentially distributed support plates, and the lower surfaces of the first and second support rings are provided with several sets of vertically arranged support legs.

[0015] Specifically, an arc-shaped positioning frame is provided on one side of the conveyor plate, and several sets of ball bearings are provided on the inner side of the arc-shaped positioning frame. A vertically arranged support rod is fixedly connected to the lower part of the arc-shaped positioning frame, and a horizontally arranged cross plate is fixedly connected to the lower end of the support rod. One end of the cross plate is fixedly connected to the first support ring.

[0016] Specifically, the support base is located below the first support ring, and the support base is fixedly connected to the lower surface of the cross plate by a tie rod.

[0017] The beneficial effects of this invention are:

[0018] (1) The valve body welding positioning fixture of the present invention uses the valve body's own weight to press down the pressing component, and synchronously drives the inner positioning component and the outer positioning component to move towards the center of the valve body. The radial positioning of the valve body is achieved by squeezing the inner and outer sides, avoiding repeated manual adjustment of the position and eliminating measurement errors. At the same time, when the inner positioning component and the outer positioning component move, the transmission component uses hydraulic drive of the support conveying component to squeeze the valve body support to the outside of the valve body, achieving automatic alignment before welding. The positioning of the two sets of valve body supports can be completed simultaneously, improving efficiency.

[0019] (2) The valve body welding positioning fixture of the present invention, when the valve body is pressed down, the cleaning component drives the third air pressure telescopic rod and the cleaning block to fit against the outside of the valve body through the air pressure of the air storage cushion, scraping off impurities such as oil stains and oxide scale, providing a clean surface for welding, which is beneficial to improving welding quality and weld strength, and no manual pretreatment is required. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is an isometric view of the present invention;

[0022] Figure 2 This is an isometric view of the present invention from another perspective;

[0023] Figure 3 for Figure 2 Enlarged view of region A;

[0024] Figure 4 This is a schematic cross-sectional view of the arc-shaped frame structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the first and second support ring structures of the present invention;

[0026] Figure 6 for Figure 4 Enlarged view of region B;

[0027] Figure 7 This is a schematic diagram of the arc-shaped positioning frame structure of the present invention;

[0028] Figure 8 for Figure 7 Enlarged view of region C;

[0029] Figure 9 This is a schematic diagram of the valve body bracket structure after installation according to the present invention;

[0030] In the diagram: 1. First mounting frame; 2. First positioning roller; 3. First support member; 4. Second mounting frame; 5. Second positioning roller; 6. Second support member; 7. First pneumatic telescopic rod; 8. Second pneumatic telescopic rod; 9. Support base; 10. Connecting rod; 11. Arc-shaped frame; 12. Extrusion block; 13. Air storage pad; 14. Air inlet connector; 15. Pallet; 16. First hydraulic telescopic rod; 17. Conveying plate; 18. Magnet; 19. Conical block; 20. Mounting plate; 21. Second hydraulic telescopic rod. 21. Telescopic rod; 22. Return spring; 23. First connector; 24. Second connector; 25. Elastic hinge seat; 26. Third pneumatic telescopic rod; 27. Cleaning block; 28. Positioning rod; 29. ​​Limiting plate; 30. Wedge-shaped extrusion surface; 31. First support ring; 32. Second support ring; 33. Support plate; 34. Support leg; 35. Arc-shaped positioning frame; 36. Ball bearing; 37. Support rod; 38. Horizontal plate; 39. Pull rod; 40. Support leg; 41. Support; 42. Mounting hole. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] To facilitate rapid positioning of the valve body bracket and improve production efficiency, as one embodiment of the present invention, such as... Figure 1 , Figure 2As shown, the valve body welding positioning fixture of the present invention includes a support assembly for placing the valve body. The support assembly is provided with an inner positioning assembly for positioning the inner side of the valve body and an outer positioning assembly for positioning the outer side of the valve body. The support assembly is provided with a pressing assembly corresponding to the valve body. When the pressing assembly is pressed down by the valve body, it drives the inner positioning assembly and the outer positioning assembly to move closer together. The outer positioning assembly is provided with a bracket conveying assembly for supporting the valve body bracket to be welded. A transmission assembly is provided between the inner positioning assembly and the outer positioning assembly. When the inner positioning assembly and the outer positioning assembly move closer together, the transmission assembly drives the bracket conveying assembly to press the valve body bracket towards one side of the valve body.

[0033] In use, the two sets of valve body brackets to be welded are placed horizontally on the bracket conveying assembly. The valve body is then horizontally hoisted to the support assembly using hoisting equipment. After the valve body is placed, its own weight presses down to trigger the pressing assembly. This assembly synchronously drives the inner positioning assembly and the outer positioning assembly to move towards the center of the valve body. The inner and outer positioning assemblies squeeze the valve body against the inner and outer sides of the valve body to achieve precise positioning. This process does not require manual calibration and automatically completes the clamping and fixing of the valve body, ensuring its positional accuracy.

[0034] When the inner positioning component and the outer positioning component move towards each other, the synchronous drive transmission component runs, and the support conveying component drives the valve body support to move towards the valve body until the valve body support and the valve body are in contact. The alignment and contact are automatically completed, achieving precise positioning before welding, avoiding manual adjustment errors, improving positioning efficiency, and can simultaneously complete the positioning operation of two sets of valve body supports. After positioning, the contact parts between the valve body and the valve body support are welded by welding equipment to ensure a firm connection between the two. No position calibration is required in the middle of the process, effectively reducing the time spent on pre-welding preparation.

[0035] After the welding operation is completed, the valve body is slowly lifted using hoisting equipment, gradually separating the valve body from the pressing component. At this time, the pressing component resets due to the loss of pressure, and drives the inner positioning component and the outer positioning component to reset outward, simultaneously releasing the clamping state on the valve body. Meanwhile, during the reset process of the inner and outer positioning components, the transmission component drives the support conveying component to return to the initial position, completing the automated reset process, reducing manual intervention, and preparing for the next set of valve body and support positioning welding operations.

[0036] To facilitate the positioning of the valve body on the inner and outer sides, for example, such as Figure 1 , Figure 2 , Figure 4 , Figure 5As shown, the present invention further includes: the inner positioning component includes a first mounting frame 1, with vertically arranged first positioning rollers 2 mounted on both sides of the first mounting frame 1, and a first support member 3 provided on one side of the first mounting frame 1; the outer positioning component includes a second mounting frame 4, with vertically arranged second positioning rollers 5 mounted on both sides of the second mounting frame 4, and a second support member 6 provided on the side of the second mounting frame 4 away from the first mounting frame 1;

[0037] The first support member 3 is fixedly connected to a first pneumatic telescopic rod 7 on the side away from the first positioning roller 2, and the second support member 6 is fixedly connected to a second pneumatic telescopic rod 8 on the side away from the second positioning roller 5. A horizontally arranged support seat 9 is provided below the support assembly. The fixed ends of the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8 are both fixedly connected to the upper surface of the support seat 9 through a vertically arranged connecting rod 10.

[0038] In use, the valve body is slowly placed on the support assembly. The valve body's own weight generates a vertical downward pressure on the pressing assembly. After the pressing assembly is pressed, it drives the output ends of the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8 to extend through the pipeline. The first pneumatic telescopic rod 7 drives the first support member 3 and the first positioning roller 2 to move towards the valve body. The second pneumatic telescopic rod 8 drives the second support member 6 and the second positioning roller 5 to move towards the valve body. The first positioning roller 2 fits tightly against the inner wall of the valve body, limiting the displacement in the inner diameter direction of the valve body. The second positioning roller 5 simultaneously presses against the outer wall of the valve body, forming a clamping force with the inner positioning roller to ensure that the valve body is completely fixed radially. The valve body is positioned on the support assembly, which facilitates the subsequent welding operation of the valve body bracket.

[0039] The support base 9 and the connecting rod 10 can ensure the overall stability of the first positioning roller 2 and the second positioning roller 5, which facilitates the positioning of the valve body on the inner and outer sides.

[0040] By utilizing the valve body's own gravity to trigger the pressing component, the synchronous movement of the first positioning roller 2 and the second positioning roller 5 can be achieved without an additional power source, simplifying the operation process. The symmetrical arrangement of the first positioning roller 2 and the second positioning roller 5 ensures that the center of the valve body is automatically aligned with the center axis of the tooling, eliminating manual measurement errors. At the same time, positioning can be completed with a single placement, reducing the repeated calibration steps of traditional tooling and improving welding efficiency.

[0041] To facilitate the clamping and positioning of the valve body by the inner and outer positioning components, for example, such as Figure 2 , Figure 4 , Figure 6As shown, the present invention further includes the pressing component comprising an arc-shaped frame 11 fixedly connected to the support component and having an upward opening, a pressing block 12 slidably connected inside the arc-shaped frame 11, an air storage pad 13 disposed between the pressing block 12 and the inner side of the arc-shaped frame 11, and an air inlet connector 14 connected to the fixed ends of the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8, and the air storage pad 13 being connected to the air inlet connector 14 via a pipeline.

[0042] In use, the valve body is placed horizontally on the support assembly. The weight of the valve body will vertically press down on the pressing block 12 in the pressing assembly. The pressing block 12 slides downward within the arc frame 11, compressing the air storage pad 13 between the pressing block 12 and the inner side of the arc frame 11. After the air storage pad 13 is compressed, the internal gas is transported through the pipeline to the air inlet joint 14 of the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8, pushing the output ends of the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8 to extend synchronously. When the first pneumatic telescopic rod 7 extends, it drives the first positioning roller 2 of the inner positioning assembly to move towards the inner side of the valve body until it is in contact with the inner wall of the valve body. When the second pneumatic telescopic rod 8 extends, it drives the second positioning roller 5 of the outer positioning assembly to move towards the outer side of the valve body until it is in close contact with the outer wall of the valve body. The first positioning roller 2 and the second positioning roller 5 achieve radial clamping of the valve body through compression, completing the positioning of the valve body. There is no need for manual adjustment of the positioning components, reducing the repeated calibration steps in traditional welding, reducing the difficulty of operation and labor costs, and at the same time avoiding displacement of the valve body during the welding process.

[0043] To facilitate the fixing of the valve body bracket, for example, such as Figure 2 , Figure 3 , Figure 7 , Figure 8 , Figure 9 As shown, the present invention also includes the bracket conveying assembly comprising trays 15 symmetrically arranged on both sides of the second mounting frame 4, each tray 15 having a horizontally arranged first hydraulic telescopic rod 16 fixedly connected to it, the output end of the first hydraulic telescopic rod 16 having a vertically arranged conveying plate 17 fixedly connected to it, and the conveying plate 17 having a magnet 18 on the side of the conveying plate 17 near the first hydraulic telescopic rod 16, and a plurality of circumferentially distributed conical blocks 19 fixedly connected to the magnet 18.

[0044] When in use, place the two sets of valve body brackets horizontally on the side of the conveyor plate 17 near the first hydraulic telescopic rod 16, so that one end of the valve body bracket contacts the magnet 18 on the conveyor plate 17. The magnet 18 magnetically attracts the valve body bracket, and at the same time, the conical block 19 on the magnet 18 is embedded into the mounting hole 42 on the surface of the valve body bracket to form a positioning snap, thus completing the fixation of one end of the valve body bracket.

[0045] The valve body is hoisted onto the support assembly. The valve body's own weight presses against the air storage pad 13 of the pressing assembly, driving the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8 to move closer to each other. When the second pneumatic telescopic rod 8 moves, it drives the second mounting frame 4 of the outer positioning assembly to move synchronously. Then, through the support plate 15, it drives the first hydraulic telescopic rod 16, the conveying plate 17, and the valve body bracket to move horizontally toward the valve body. At the same time, when the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8 move closer to each other, it drives the transmission structure to work. Relying on the transmission structure, it drives the output section of the first hydraulic telescopic rod 16 to shorten. The first hydraulic telescopic rod 16 drives the conveying plate 17 to move further to the outside of the valve body, so that the valve body bracket moves closer to the valve body along with the conveying plate 17. After the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8 have completed clamping the inside and outside of the valve body, the conveying plate 17 drives the valve body bracket to make close contact with the outside of the valve body, completing the positioning before welding.

[0046] After welding is completed, the valve body is hoisted and moved upward. The valve body no longer squeezes the air storage pad 13. The first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8 are reset, which drives the support plate 15, the first hydraulic telescopic rod 16 and the conveying plate 17 back to the initial position. This facilitates the subsequent positioning and welding of the valve body bracket for the next set of valve bodies.

[0047] It should be noted that the valve body support of the present invention includes a support leg 40 and a support 41. The support 41 has circumferentially distributed mounting holes 42. When placing the valve body support, the mounting holes 42 on the support 41 are aligned with the conical block 19, and the support 41 is magnetically attracted by the magnet 18 to ensure the overall stability of the valve body support. After welding is completed, when the valve body is hoisted and moved upward, the mounting holes 42 on the support 41 are pressed against the outer side of the conical block 19, and the support 41 is easily separated from the conical block 19 by the conical block 19.

[0048] To facilitate the fitting of the valve body bracket before welding, for example, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the present invention also includes the transmission assembly comprising mounting plates 20 respectively disposed on one side of the first mounting frame 1 and the second mounting frame 4, a second hydraulic telescopic rod 21 fixedly connected between the two sets of mounting plates 20, and a return spring 22 fixedly connected between the output end of the second hydraulic telescopic rod 21 and the mounting plate 20.

[0049] The support plate 15 is provided with a first connector 23 that communicates with the first hydraulic telescopic rod 16 on one side, and the mounting plate 20 is provided with a second connector 24 that communicates with the fixed end of the second hydraulic telescopic rod 21 on one side. The second connector 24 is connected to the first connector 23 through a pipeline.

[0050] In use, the valve body bracket is placed on the conveying plate 17 of the bracket conveying assembly and fixed by the magnet 18 and the conical block 19. At this time, the second hydraulic telescopic rod 21 of the transmission assembly is in a naturally extended state and the return spring 22 is not compressed. When the valve body is hoisted to the support assembly, the air storage pad 13 of the pressing assembly is squeezed, driving the inner positioning assembly and the outer positioning assembly to move towards the center of the valve body. At this time, the first mounting frame 1 and the second mounting frame 4 drive the mounting plate 20 to move closer to each other, squeezing the second hydraulic telescopic rod 21 to retract it. The return spring 22 is compressed. When the second hydraulic telescopic rod 21 retracts, the hydraulic oil at the fixed end flows to the first joint 23 through the second connector 24 and the pipeline, pushing the output end of the first hydraulic telescopic rod 16 to shorten. The first hydraulic telescopic rod 16 drives the conveying plate 17 to move towards the valve body, so that the valve body bracket is squeezed to the outside of the valve body with the conveying plate 17, completing the precise fit before welding.

[0051] After welding is completed, the valve body is lifted, the pressing assembly is reset, the inner positioning assembly and the outer positioning assembly are reset and moved, the pressure between the mounting plate 20 is released, the reset spring 22 pushes the second hydraulic telescopic rod 21 to extend, the hydraulic oil flows back through the pipeline, the first hydraulic telescopic rod 16 is reset synchronously, and the conveying plate 17 returns to the initial position to prepare for the next set of welding.

[0052] The transmission assembly uses hydraulic transmission to link the inner and outer positioning components with the support conveying component. The mechanical energy of the valve body pressing down automatically triggers the support positioning, eliminating the need for an additional power source, reducing manual operation and improving positioning efficiency.

[0053] To facilitate surface cleaning of the valve body before welding, for example, such as Figure 1 , Figure 7 , Figure 8 As shown, the present invention also includes symmetrically arranged cleaning components on both sides of the external positioning component. The cleaning component includes elastic hinge seats 25 symmetrically arranged on the outside of the second mounting frame 4. A horizontally arranged third pneumatic telescopic rod 26 is hinged on the elastic hinge seat 25. The fixed end of the third pneumatic telescopic rod 26 is connected to the air storage pad 13 through a pipeline and an exhaust valve.

[0054] The output end of the third pneumatic telescopic rod 26 is provided with a vertically arranged cleaning block 27. The output end of the third pneumatic telescopic rod 26 is fixedly connected with two sets of vertically arranged positioning rods 28. The upper end of the positioning rod 28 passes through the cleaning block 27 and is slidably connected to the cleaning block 27. The upper end of the positioning rod 28 is provided with a limiting plate 29. The cleaning block 27 is provided with a wedge-shaped extrusion surface 30 near the upper and lower corners of the valve body.

[0055] When in use, when the lower end of the valve body is placed on the support assembly, the cleaning assembly moves towards the valve body and moves synchronously with the outer positioning assembly. The cleaning assembly first inserts between the flanges on the upper and lower sides of the valve body and works with the positioning rod 28 to allow the cleaning block 27 to move up and down, thereby preventing the cleaning block 27 from affecting the subsequent downward movement of the valve body.

[0056] As the valve body continues to move downward, it compresses the air storage pad 13 of the pressing assembly. The gas in the air storage pad 13 enters the fixed end of the third pneumatic telescopic rod 26 through the pipeline and exhaust valve. The air pressure drives the output end of the third pneumatic telescopic rod 26 to extend, pushing the cleaning block 27 to expand outward of the valve body. At the same time, the second pneumatic telescopic rod 8 is driven by the air pressure of the air storage pad 13, which drives the second mounting frame 4 to move towards the valve body. Then, through the elastic hinge seat 25, the third pneumatic telescopic rod 26 and the cleaning block 27 are pulled to approach the valve body synchronously. At this time, the cleaning block 27 is pressed into contact with the outside of the valve body. In conjunction with the expansion of the third pneumatic telescopic rod 26, it simultaneously scrapes away oil stains, oxide scale and other impurities on the outside of the valve body, completing the surface cleaning before welding.

[0057] At the same time, when the second mounting frame 4 drives the third pneumatic telescopic rod 26 to expand outward, the elastic hinge seat 25 undergoes elastic deformation due to the force, storing potential energy.

[0058] After welding, the valve body is lifted by the hoisting equipment, and the air storage pad 13 is no longer squeezed. Relying on the reset movement of the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8, the second mounting frame 4 is driven to reset and move synchronously. At the same time, the gas at the fixed end of the third pneumatic telescopic rod 26 flows back into the air storage pad 13. Relying on the release of the potential energy stored in the elastic hinge seat 25, the third pneumatic telescopic rod 26 and the cleaning block 27 are driven to reset towards the second mounting frame 4. As the second pneumatic telescopic rod 8 resets, the second mounting frame 4 drives the elastic hinge seat 25, the third pneumatic telescopic rod 26 and the cleaning block 27 to completely return to the initial state, waiting for the next valve body placement to complete the cleaning of the welding position of the valve body.

[0059] When the welded valve body is lifted upward by the hoisting equipment, the lower flange of the valve body gradually moves away from the support assembly as the lifting action proceeds. When the flange moves to the lower boundary of the cleaning block 27, the edge of the flange contacts the wedge-shaped extrusion surface 30 at the lower corner of the cleaning block 27, generating a thrust on the cleaning block 27, causing the cleaning block 27 to slide on the positioning rod 28, thus preventing the valve body from being obstructed by the cleaning block 27 during its upward movement.

[0060] For example, such as Figure 1 , Figure 4 , Figure 5As shown, the present invention also includes a support assembly comprising a horizontally arranged first support ring 31 and a second support ring 32, the second support ring 32 being located inside the first support ring 31, both the first support ring 31 and the second support ring 32 having notches, the two ends of the first support ring 31 and the second support ring 32 being fixedly connected to the two sides of the arc-shaped frame 11, the first support ring 31 and the second support ring 32 having a plurality of circumferentially distributed support plates 33, and the lower surfaces of the first support ring 31 and the second support ring 32 having a plurality of vertically arranged support legs 34.

[0061] In use, the first support ring 31, the second support ring 32 and the support plate 33 can improve the overall stability and facilitate the stable placement of the flange valve body; at the same time, the first support ring 31 and the second support ring 32 can further improve the overall stability of the arc frame 11, so that when the valve body is placed, the valve body can press down to drive the pressing component to work; the support leg 34 can further ensure the overall stability of the support component.

[0062] For example, such as Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the present invention also includes an arc-shaped positioning frame 35 on one side of the conveying plate 17, a plurality of sets of ball bearings 36 on the inner side of the arc-shaped positioning frame 35, a vertically arranged support rod 37 fixedly connected to the lower part of the arc-shaped positioning frame 35, a horizontally arranged cross plate 38 fixedly connected to the lower end of the support rod 37, and one end of the cross plate 38 fixedly connected to the first support ring 31.

[0063] When in use, when the valve body bracket is placed on the conveyor plate 17, the outer side of the valve body bracket is located inside the arc-shaped positioning frame 35. The outline of the arc-shaped positioning frame 35 matches the outer arc of the valve body bracket, forming a semi-enclosed support, which facilitates the horizontal movement of the valve body bracket and provides convenience for subsequent welding.

[0064] The ball bearing 36 inside the arc-shaped positioning frame 35 contacts the surface of the valve body bracket. When the conveying plate 17 is driven to move toward the valve body by the first hydraulic telescopic rod 16, the rolling of the ball bearing 36 can reduce the resistance between the valve body bracket and the arc-shaped positioning frame 35, making the valve body bracket move more smoothly. Even under heavy load conditions, the ball bearing 36 can ensure the stability of the valve body bracket movement.

[0065] For example, such as Figure 4 , Figure 6 As shown, the present invention also includes a support base 9 located below the first support ring 31, and the support base 9 is fixedly connected to the lower surface of the horizontal plate 38 by a pull rod 39.

[0066] During use, the stability of the support base 9 can be further ensured by relying on the pull rod 39.

[0067] In use, the present invention involves placing two sets of valve body brackets to be welded horizontally on the conveying plate 17 of the bracket conveying assembly, aligning the mounting holes 42 on the support 41 with the conical blocks 19 on the conveying plate 17, and fixing the valve body brackets by magnetic attraction using the magnet 18, ensuring that the conical blocks 19 are embedded in the mounting holes 42. When the valve body brackets are placed on the conveying plate 17, the outer side of the valve body brackets is located inside the arc-shaped positioning frame 35, and the outline of the arc-shaped positioning frame 35 matches the outer arc of the valve body brackets, forming a semi-enclosed support, which facilitates the horizontal movement of the valve body brackets and provides convenience for subsequent welding.

[0068] The valve body is hoisted onto the support assembly. When the lower end of the valve body is placed on the support assembly, the outer positioning assembly moves towards the valve body, and the cleaning assembly moves synchronously with the outer positioning assembly. The cleaning assembly first inserts between the flanges on the upper and lower sides of the valve body, and cooperates with the positioning rod 28 to allow the cleaning block 27 to move up and down, thereby preventing the cleaning block 27 from affecting the subsequent downward movement of the valve body. As the valve body continues to move downward, it squeezes the air storage pad 13 of the pressing assembly. The gas in the air storage pad 13 enters the fixed end of the third pneumatic telescopic rod 26 through the pipeline and the exhaust valve. The air pressure drives the output end of the third pneumatic telescopic rod 26 to extend, pushing the cleaning block. 27 expands outwards from the valve body. At the same time, the second pneumatic telescopic rod 8 is driven by the air pressure of the air storage cushion 13, which drives the second mounting frame 4 to move towards the valve body. Then, through the elastic hinge seat 25, it pulls the third pneumatic telescopic rod 26 and the cleaning block 27 to move towards the valve body simultaneously. At this time, the cleaning block 27 is pressed against the outside of the valve body. In conjunction with the expansion of the third pneumatic telescopic rod 26, it scrapes away oil stains, oxide scale and other impurities on the outside of the valve body, completing the surface cleaning before welding. At the same time, when the second mounting frame 4 drives the third pneumatic telescopic rod 26 to expand outwards, the elastic hinge seat 25 undergoes elastic deformation due to the force, storing potential energy.

[0069] Simultaneously, the weight of the valve body will vertically press down on the pressing block 12 in the pressing assembly. The pressing block 12 slides downward within the arc frame 11, and the air storage pad 13 between the pressing block 12 and the inner side of the arc frame 11 is compressed. After the air storage pad 13 is compressed, the internal gas is transported through the pipeline to the air inlet joint 14 of the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8, pushing the output ends of the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8 to extend synchronously. The first pneumatic telescopic rod 7 drives the first support member 3 and the first positioning roller 2 to move towards the valve body. The second pneumatic telescopic rod 8 drives the second support member 6 and the second positioning roller 5 to move towards the valve body. The first positioning roller 2 is tightly attached to the inner wall of the valve body, restricting the displacement in the inner diameter direction of the valve body. The second positioning roller 5 simultaneously presses the outer wall of the valve body, forming a clamping force with the inner positioning roller to ensure that the valve body is completely fixed radially. The valve body is positioned on the support assembly, which facilitates the subsequent welding operation of the valve body bracket.

[0070] When the first mounting frame 1 and the second mounting frame 4 bring the mounting plate 20 closer together, they compress the second hydraulic telescopic rod 21 to retract it, and the return spring 22 is compressed. When the second hydraulic telescopic rod 21 retracts, the hydraulic oil at the fixed end flows through the second connector 24 and the pipeline to the first connector 23, pushing the output end of the first hydraulic telescopic rod 16 to shorten. The first hydraulic telescopic rod 16 drives the conveying plate 17 to move towards the valve body, so that the valve body bracket is pressed to the outside of the valve body with the conveying plate 17, completing the precise fit before welding. The rolling of the ball 36 can reduce the resistance between the valve body bracket and the arc-shaped positioning frame 35, making the valve body bracket move more smoothly.

[0071] After welding, the valve body is hoisted and moved upwards. The valve body no longer compresses the air storage pad 13, and the first pneumatic telescopic rod 7 and the second pneumatic telescopic rod 8 are reset. This causes the support plate 15, the first hydraulic telescopic rod 16, and the conveying plate 17 to return to their initial positions, facilitating the subsequent positioning and welding of the valve body bracket for the next set of valve bodies. At the same time, the gas at the fixed end of the third pneumatic telescopic rod 26 flows back into the air storage pad 13. Relying on the potential energy stored in the elastic hinge seat 25, the third pneumatic telescopic rod 26 and the cleaning block 27 are released, causing them to reset towards the second mounting frame 4. As the second pneumatic telescopic rod 8 resets, the second mounting frame 4 causes the elastic hinge seat 25, the third pneumatic telescopic rod 26, and the cleaning block 27 to completely return to their initial state, waiting for the next valve body placement to complete the cleaning of the welding position of the valve body.

[0072] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve body welding fixture, characterized by, The support assembly for placing the valve body is provided with an inner positioning assembly for positioning the inner side of the valve body and an outer positioning assembly for positioning the outer side of the valve body, the support assembly is provided with a pressing assembly corresponding to the valve body, the pressing assembly drives the inner positioning assembly and the outer positioning assembly to approach after the valve body is pressed down, the outer positioning assembly is provided with a support conveying assembly for supporting the valve body support to be welded, a transmission assembly is arranged between the inner positioning assembly and the outer positioning assembly, and the transmission assembly drives the support conveying assembly to extrude the valve body support to one side of the valve body when the inner positioning assembly and the outer positioning assembly approach. The inner positioning assembly comprises a first mounting frame (1), and the outer positioning assembly comprises a second mounting frame (4). The support conveying assembly comprises a supporting plate (15) symmetrically arranged on both sides of the second mounting frame (4), the supporting plate (15) is fixedly connected with a first hydraulic telescopic rod (16) arranged horizontally, the output end of the first hydraulic telescopic rod (16) is fixedly connected with a conveying plate (17) arranged vertically, the side of the conveying plate (17) close to the first hydraulic telescopic rod (16) is provided with a magnet (18), and the magnet (18) is fixedly connected with a plurality of groups of conical blocks (19) distributed in a circle. The transmission assembly comprises a mounting plate (20) arranged on one side of the first mounting frame (1) and the second mounting frame (4), respectively, and a second hydraulic telescopic rod (21) is fixedly connected between the two mounting plates (20), and a reset spring (22) is fixedly connected between the output end of the second hydraulic telescopic rod (21) and the mounting plate (20). One side of the supporting plate (15) is provided with a first joint (23) in communication with the first hydraulic telescopic rod (16), one side of the mounting plate (20) is provided with a second joint (24) in communication with the fixed end of the second hydraulic telescopic rod (21), and the second joint (24) is in communication with the first joint (23) through a pipeline.

2. The valve body welding positioning tool according to claim 1, characterized in that, Vertical first positioning rollers (2) are arranged on both sides of the first mounting frame (1), and a first supporting piece (3) is arranged on one side of the first mounting frame (1); vertical second positioning rollers (5) are arranged on both sides of the second mounting frame (4), and a second supporting piece (6) is arranged on the side of the second mounting frame (4) away from the first mounting frame (1); A first pneumatic telescopic rod (7) is fixedly connected to the side of the first supporting piece (3) away from the first positioning roller (2), a second pneumatic telescopic rod (8) is fixedly connected to the side of the second supporting piece (6) away from the second positioning roller (5), and a supporting seat (9) arranged horizontally is arranged below the support assembly, and the fixed ends of the first pneumatic telescopic rod (7) and the second pneumatic telescopic rod (8) are fixedly connected to the upper surface of the supporting seat (9) through a connecting rod (10) arranged vertically.

3. The valve body welding positioning tool according to claim 2, characterized in that, The pressing assembly comprises an arc-shaped frame (11) fixedly connected with the supporting assembly and opening upward, an extrusion block (12) slidingly connected in the arc-shaped frame (11), a gas storage pad (13) arranged between the extrusion block (12) and the inner side of the arc-shaped frame (11), and a gas inlet joint (14) communicated with the fixed end of each of the first and second gas pressure telescopic rods (7, 8), wherein the gas storage pad (13) is communicated with the gas inlet joint (14) through a pipeline.

4. The valve body welding positioning tool according to claim 3, characterized in that, The outer positioning assembly is provided with symmetrical cleaning assemblies on both sides, the cleaning assembly comprises elastic hinged seats (25) symmetrically arranged on the outer side of the second mounting frame (4), a third gas pressure telescopic rod (26) horizontally arranged and hinged on the elastic hinged seat (25), and the fixed end of the third gas pressure telescopic rod (26) is communicated with the gas storage pad (13) through a pipeline and an exhaust valve. The output end of the third gas pressure telescopic rod (26) is provided with a cleaning block (27) vertically arranged, the output end of the third gas pressure telescopic rod (26) is fixedly connected with two groups of positioning rods (28) vertically arranged, the upper end of the positioning rod (28) penetrates through the cleaning block (27) and is slidingly connected with the cleaning block (27), and the upper end of the positioning rod (28) is provided with a limiting plate (29), and the upper corners and lower corners of the cleaning block (27) close to the valve body are each provided with a wedge-shaped extrusion surface (30).

5. The valve body welding fixture of claim 4, wherein, The supporting assembly comprises a first supporting ring (31) and a second supporting ring (32) horizontally arranged, the second supporting ring (32) is located on the inner side of the first supporting ring (31), the first supporting ring (31) and the second supporting ring (32) are each provided with a notch, the two ends of the first supporting ring (31) and the second supporting ring (32) are fixedly connected with the two sides of the arc-shaped frame (11), the first supporting ring (31) and the second supporting ring (32) are provided with a plurality of groups of supporting plates (33) circumferentially distributed, and the lower surfaces of the first supporting ring (31) and the second supporting ring (32) are provided with a plurality of groups of supporting legs (34) vertically arranged.

6. The valve body welding fixture of claim 5, wherein, One side of the conveying plate (17) is provided with an arc-shaped positioning frame (35), the inner side of the arc-shaped positioning frame (35) is provided with a plurality of groups of rolling balls (36), the arc-shaped positioning frame (35) is fixedly connected with a supporting rod (37) vertically arranged below, the lower end of the supporting rod (37) is fixedly connected with a horizontal cross plate (38), and one end of the cross plate (38) is fixedly connected with the first supporting ring (31).

7. The valve body welding fixture of claim 6, wherein, The supporting seat (9) is located below the first supporting ring (31), and the supporting seat (9) is fixedly connected with the lower surface of the cross plate (38) through a pull rod (39).

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