A stop valve welding assist device and method of use thereof

Abstract

The application belongs to the technical field of welding, and discloses a stop valve welding auxiliary device and a use method thereof, which comprises a base, a fixed plate and a movable plate, the side surfaces of the fixed plate and the movable plate are rotationally installed with assembly, and the end portions of the two assembly are fixedly installed with installation barrels. The rotating sleeve on one side of the assembly is sleeved on the inner side of the weld at the welding position, and the rotating mechanism is started in the actual welding process. The rotation of the second gear is driven by the rotating mechanism, the rotation of the first gear outside the rotating pipe is ensured in the rotating process, the rotation of the rotating sleeve is further realized, the molten drops generated in the welding process are thrown away by the rotating rotating sleeve when dropping, the protection of the valve body and the inside of the pipe end to be welded is realized, the molten drops in the welding process are effectively prevented from dropping inside to form a metal protrusion, the inner wall of the stop valve is ensured to be clean and smooth, the quality and the aesthetic appearance after the actual welding are greatly improved, and the use effect is good.

Description

Technical Field

[0001] This invention belongs to the field of welding technology, specifically a welding auxiliary device for gate valves and its usage method. Background Technology

[0002] A gate valve is a common industrial valve used to control the flow of fluids (liquids or gases). It can be used to open or close fluid passages in pipelines and can withstand certain pressures and temperatures. For welding gate valves, auxiliary devices are usually required for positioning and installation. When welding the valve body and the inlet / outlet ends, the valve body and the ends to be welded are usually positioned before welding.

[0003] In existing gate valve welding auxiliary devices, two sets of clamps are typically used to clamp and fix the valve body and the end of the pipe to be welded. After fixing, they are moved closer together to bring the contact surfaces closer and perform continuous circumferential welding. However, in order to ensure welding quality, sufficient filling welding is required at the contact section. However, in actual welding, since the welding position is circumferential, when welding at the top, the molten droplets during the welding process enter the valve body and the end of the pipe through the weld seam, resulting in solidified molten droplets inside. This affects the internal flatness, causing multiple metal protrusions on the inner wall of the valve body and the end of the pipe after welding, resulting in poor flatness and poor actual welding quality.

[0004] Furthermore, in the existing gate valve welding auxiliary device, when performing circumferential welding, welding at different angles is required after the top part is welded. Welding is usually performed by rotating the welding end. However, due to the limiting effect of the auxiliary device, it is difficult to achieve welding at all angles. Moreover, when relying on the connection at the welding point to add a clamping mechanism by rotating, it is easy to cause the valve body and the pipe end that have just been partially welded to separate again. In practice, when welding the valve body and the inlet / outlet end, it is difficult to achieve convenient and effective circumferential welding. The efficiency is low, the welding stability is poor, and the performance is unsatisfactory. Summary of the Invention

[0005] The purpose of this invention is to provide a welding auxiliary device for gate valves and its usage method, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding auxiliary device for a gate valve and its method of use, comprising a base, a fixed plate, and a movable plate. The sides of both the fixed plate and the movable plate are rotatably mounted with components. Each end of one of the mounting components is fixedly mounted with a mounting cylinder. The end face of each mounting cylinder is fixedly connected to a clamping component. A fixed tube and a rotating mechanism are fixedly mounted on the side of one mounting component, and a limit rod is fixedly mounted on the side of the other mounting component. A rotating tube is rotatably sleeved on the outer surface of the fixed tube, and a gear is fixedly sleeved on the outer surface of the rotating tube. A rotating sleeve is fixedly fitted onto the outer surface of the tube. An air supply mechanism is fixedly connected to the side of the fixed tube. A movable plug is movably fitted inside the fixed tube. A positioning plate is fixedly connected to the side of the movable plug. A spring is fixedly connected to the side of the movable plug. A first side opening is opened on the outer surface of the fixed tube. A second side opening and a second annular groove are respectively opened on the outer and inner surfaces of the rotating tube. A third side opening and an arc-shaped groove are respectively opened on the inner and outer surfaces of the rotating sleeve. A side hole is opened on the outer surface of the fixed tube. The inner and outer ends of the third side opening are respectively connected to the arc-shaped groove and the second side opening.

[0007] The rotating mechanism includes a motor frame, a motor, a rotating shaft, and a second gear, which meshes with the first gear.

[0008] The air supply mechanism includes an air supply frame, fan blades, connecting pipe, a first sealing ring, and an air inlet.

[0009] Preferably, a retaining ring is fixedly sleeved on the outer surface of the fixed tube, a first annular groove is formed on the inner surface of the rotating tube, the inner surface of the first annular groove is rotatably sleeved with the retaining ring, and a second annular groove is located outside the first side opening and is connected to the first side opening.

[0010] Preferably, the mounting assembly includes a rotating disk, a connecting plate, a rotating ring, and a pull rod. The connecting plate and the pull rod are respectively fixedly connected to the inner and outer sides of the rotating disk. The connecting plate is distributed in a ring and fixedly connected to the mounting cylinder. The rotating ring is fixedly sleeved on the outer surface of the rotating disk.

[0011] Preferably, the motor frame is fixedly mounted on the inner side of the rotating disk, the motor is fixedly mounted in the motor frame, the rotating shaft is fixedly connected to the output shaft of the motor, the second gear is fixedly sleeved on the outer surface of the rotating shaft, the air supply frame is sleeved on the outer side of the rotating shaft, the fan blade is located in the air supply frame and fixedly sleeved on the outer surface of the rotating shaft, the connecting pipe is fixedly connected between the air supply frame and the fixed pipe, the air inlet is opened on the end face of the air supply frame and near the second gear, the first sealing ring is fixedly mounted in the inner surface of the air supply frame and located on the outer side of the rotating shaft, and the connecting pipe is connected to the side hole.

[0012] Preferably, the clamping assembly includes a side frame, an inner frame, a clamping plate, and a second spring. The side frame is fixedly connected to the end face of the mounting cylinder and is distributed in a ring with equal intervals. The inner frame is fixedly sleeved inside the side frame. The clamping plate is movably sleeved inside the inner frame. The second spring is fixedly connected inside the side frame and fixedly connected to the bottom of the clamping plate. The inner end area of ​​the clamping plate is larger than the outer end area.

[0013] Preferably, the mounting cylinder has an annular cavity inside, and the outer surface and end face of the mounting cylinder have an outer annular groove and a through hole, respectively. The two ends of the through hole are connected to the annular cavity and the side frame, respectively, and the outer annular groove is connected to the annular cavity.

[0014] Preferably, a second sealing ring is movably sleeved inside the annular cavity, and a threaded sleeve is threadedly sleeved in the annular cavity and the outer annular groove. The threaded sleeve is fixedly connected to the second sealing ring, and lubricating oil is injected into the annular cavity and the through hole.

[0015] Preferably, the fixed plate is fixedly connected to the top of the base, the movable plate is slidably sleeved on the top of the base, and both the fixed plate and the movable plate have a third annular groove inside. A damping ring is fixedly sleeved inside the third annular groove, and the rotating ring is rotatably sleeved in the third annular groove. The two rotating disks are respectively rotatably sleeved inside the fixed plate and the movable plate. The end face of the limiting rod has a limiting groove, and the cross-sectional dimensions of the limiting groove are adapted to the cross-sectional dimensions of the positioning plate. The limiting rod is located on the side closer to the movable plate, and the fixed tube is located on the side closer to the fixed plate.

[0016] Preferably, the top of the base is provided with a sliding groove, and a round rod and an electric push rod are fixedly installed inside the sliding groove. The movable plate is slidably sleeved in the sliding groove and movably sleeved on the outside of the round rod. The movable end of the electric push rod is fixedly connected to the movable plate.

[0017] A method for using a welding auxiliary device for a gate valve includes the following operating steps:

[0018] Step 1: Place the end of the pipe to be welded on the outside of the rotating sleeve and on the outside of the left clamping assembly. Rotate the threaded sleeve on the mounting cylinder to squeeze the lubricating oil in the ring cavity of the No. 2 sealing ring. This causes the lubricating oil to enter the clamping assembly through the through hole, causing the clamping plate in the clamping assembly to extend outward and clamp and fix it from the inside of the pipe end. Similarly, complete the sleeve clamping of the valve body on the outside of the right clamping assembly.

[0019] Step 2: Start the electric push rod, so that the movable plate moves a set of mounting components and valve body on the side to move laterally and close to the clamped and fixed pipe end, so that the end to be welded is close. Start the rotating mechanism, so that the second gear in the rotating mechanism drives the first gear on the rotating tube to rotate, so that the rotating tube drives the rotating sleeve to rotate, and the rotating sleeve rotates inside the weld position.

[0020] Step 3: Using a welding device, weld along the top of the valve body and the pipe end to be welded with an arc-shaped spacing. As the molten droplets fall downwards during the welding process, the rotating sleeve rotates to centrifugally throw the molten droplets out, break them, and refill them into the weld. At the same time, when the rotating mechanism rotates, it drives the fan blades in the air supply mechanism to rotate, generating axial airflow towards the rear. The airflow enters the fixed pipe through the connecting pipe and pushes the internal movable plug and positioning plate to move, compressing the No. 1 spring, so that the positioning plate is inserted into the limiting groove of the right limiting rod.

[0021] Step 4: After completing the welding of the arc spacing at one end of the top, pull the pull rod in the mounting assembly to rotate the mounting assembly and adjust the angle. At the same time, the positioning plate in the fixed tube drives the limit rod to rotate, which in turn drives the rotation of the mounting assembly on the other side, so that the pipe opening to be welded and the valve body rotate synchronously. After rotation, the welding of the remaining parts to be welded is carried out to complete the welding.

[0022] Step 5: After welding is completed, reset the clamping assembly of the right clamping valve body, and start the electric push rod again to move the movable plate away a certain distance. As the air supply mechanism continues to supply air into the fixed pipe, the movable plug moves further and opens the No. 1 side port, allowing the incoming air to enter the No. 2 annular groove through the No. 1 side port, and then blow out through the No. 2 and No. 3 side ports. The blown air is blown out along the arc groove and rotates and blows towards the welded position when the rotating sleeve rotates, so that the welded position cools down quickly.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. This invention uses two sets of clamping components to clamp and fix the valve body and the end of the pipe to be welded before welding. During the fitting and fixing process, a rotating sleeve on the mounting component side is fitted onto the inner side of the weld at the welding position. During the actual welding process, the rotating mechanism is activated, which drives the rotation of the second gear. This ensures that the first gear on the outside of the rotating pipe rotates during the rotation process, thereby rotating the rotating sleeve. This allows the molten droplets generated during welding to be centrifugally thrown away by the rotating sleeve as they fall, achieving protection inside the valve body and the end of the pipe to be welded. This effectively prevents molten droplets from falling inside and forming metal protrusions, ensuring a clean and smooth inner wall of the shut-off valve. This greatly improves the quality and aesthetics of the actual weld and has a good performance.

[0025] 2. This invention utilizes a fixed tube fitted inside a rotating tube, supported by the fixed tube and an outer retaining ring. Simultaneously, a movable plug and a positioning plate within the rotating tube enable the rotating sleeve to rotate. A corresponding air supply mechanism inputs the airflow generated by the rotation into the fixed tube, thus pushing the positioning plate forward. With the positioning plate and a limiting rod on the other side engaged, two sets of mounting components can rotate synchronously by rotating one set of components. This allows the valve body and the end of the pipe to be welded to rotate synchronously and stably, adapting to different welding angles. This avoids the need for rotational adjustment of the valve body and the welded pipe during the welding process, improving rotation convenience while maintaining initial welding stability, resulting in excellent performance.

[0026] 3. This invention utilizes the connection between the air supply mechanism and the fixed pipe. After welding, by resetting the clamping assembly on one side of the valve body and moving the movable plate and the limiting rod, the limitation on the positioning plate is released. This allows the gas supplied to the fixed pipe to push the movable plug to open the first side port. Then, during rotation, the air volume is guided to the arc-shaped groove on the outside of the rotating sleeve. After welding, while maintaining rotation, the welded position is rapidly cooled from the inside. The actual cooling effect is good. From welding to cooling from the inside, the process is continuous and fast, and the effect is good. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a cross-sectional schematic diagram of the fixed tube and rotating sleeve of the present invention;

[0029] Figure 3 This is a cross-sectional schematic diagram of the clamping assembly of the present invention;

[0030] Figure 4 This is a schematic diagram of the installation of the mounting components and the rotating mechanism of the present invention;

[0031] Figure 5 This is a cross-sectional view of the rotating tube and rotating sleeve of the present invention;

[0032] Figure 6 This is a schematic diagram of the fixing tube of the present invention;

[0033] Figure 7 This is a cross-sectional schematic diagram of the air supply mechanism of the present invention;

[0034] Figure 8 This is an exploded view of the fixing plate of the present invention;

[0035] Figure 9 This is a schematic diagram of the limiting rod of the present invention.

[0036] In the diagram: 1. Base; 2. Fixed plate; 3. Movable plate; 4. Mounting assembly; 41. Rotating disk; 42. Connecting plate; 43. Rotating ring; 44. Pull rod; 5. Rotating mechanism; 51. Motor frame; 52. Motor; 53. Rotating shaft; 54. Gear No. 2; 6. Mounting cylinder; 7. Clamping assembly; 71. Side frame; 72. Inner frame; 73. Clamping plate; 74. Spring No. 2; 8. Fixed tube; 9. Limiting rod; 10. Rotating tube; 11. Rotating sleeve; 12. Gear No. 1; 13. Limiting groove; 14. Movable plug; 15. Positioning plate; 16. Spring No. 1; 17. Side opening No. 1; 18. Side opening No. 2; 19. Side opening No. 3; 20. Arc groove; 21. Annular groove No. 1; 22. Annular groove No. 2; 23. Snap ring; 24. Side hole; 25. Air supply mechanism; 251. Air supply frame; 252. Fan blade; 253. Connecting pipe; 254. Sealing ring No. 1; 255. Air inlet; 26. Annular groove No. 3; 27. Damping ring; 28. Slide groove; 29. ​​Round rod; 30. Electric push rod; 31. Through hole; 32. Annular cavity; 33. Threaded sleeve; 34. Sealing ring No. 2; 35. Outer annular groove. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 9As shown, this embodiment of the invention provides a welding auxiliary device for a gate valve and its usage method, including a base 1, a fixed plate 2, and a movable plate 3. Assembly 4 is rotatably mounted on the sides of both the fixed plate 2 and the movable plate 3. Mounting cylinders 6 are fixedly mounted at the ends of both mounting assemblies 4. Clamping assemblies 7 are fixedly connected to the end faces of the mounting cylinders 6. A fixed tube 8 and a rotating mechanism 5 are fixedly mounted on the side of one mounting assembly 4, respectively. A limit rod 9 is fixedly mounted on the side of the other mounting assembly 4. A rotating tube 10 is rotatably sleeved on the outer surface of the fixed tube 8. A first gear 12 is fixedly sleeved on the outer surface of the rotating tube 10. A rotating... The sleeve 11 has an air supply mechanism 25 fixedly connected to the side of the fixed pipe 8. The fixed pipe 8 has a movable plug 14 movably connected inside. The movable plug 14 has a positioning plate 15 fixedly connected to the side of the movable plug 14. The movable plug 14 has a first spring 16 fixedly connected to the side of the movable plug 14. The outer surface of the fixed pipe 8 has a first side opening 17. The outer and inner surfaces of the rotating pipe 10 have a second side opening 18 and a second annular groove 22 that are connected to each other. The inner and outer surfaces of the rotating sleeve 11 have a third side opening 19 and an arc groove 20. The outer surface of the fixed pipe 8 has a side hole 24. The inner and outer ends of the third side opening 19 are connected to the arc groove 20 and the second side opening 18, respectively.

[0039] The rotating mechanism 5 includes a motor frame 51, a motor 52, a rotating shaft 53, and a second gear 54, which meshes with the first gear 12.

[0040] The air supply mechanism 25 includes an air supply frame 251, a fan blade 252, a connecting pipe 253, a first sealing ring 254, and an air inlet 255.

[0041] First embodiment: During welding, the electric push rod 30 is activated, causing the movable plate 3 to move a set of mounting components 4 on the side and the valve body laterally closer to the clamped and fixed pipe end, bringing the end to be welded closer. The rotating mechanism 5 is activated, causing the second gear 54 in the rotating mechanism 5 to drive the first gear 12 on the rotating pipe 10 to rotate, causing the rotating pipe 10 to drive the rotating sleeve 11 to rotate. The rotating sleeve 11 rotates inside the weld position. The welding device is used to weld along the top of the position to be welded at the valve body and the pipe end with an arc-shaped spacing. As the molten droplets fall downward during the welding process, the rotating sleeve 11 rotates to centrifugally throw the molten droplets out, break them, and refill them into the weld. At the same time, when the rotating mechanism 5 rotates, it drives the fan blades 252 in the air supply mechanism 25 to rotate, generating axial airflow towards the rear. The airflow enters the fixed pipe through the connecting pipe 253. In step 8, the internal movable plug 14 and positioning plate 15 are pushed to move, compressing the first spring 16, so that the positioning plate 15 is inserted into the limiting groove 13 of the right limiting rod 9. After the arc spacing of the top end is welded, the pull rod 44 in the mounting assembly 4 is pulled, so that the mounting assembly 4 rotates to adjust the angle. At the same time, the positioning plate 15 in the fixed tube 8 drives the limiting rod 9 to rotate, thereby driving the rotation of the other side mounting assembly 4, so that the pipe port to be welded and the valve body rotate synchronously. After the rotation, the welding treatment of the remaining parts to be welded is carried out to complete the welding. Among them, the outer surface of the fixed tube 8 is fixedly sleeved with a retaining ring 23, and the inner surface of the rotating tube 10 is provided with a first ring groove 21. The inner surface of the first ring groove 21 is rotatably sleeved with the retaining ring 23. The second ring groove 22 is located outside the first side opening 17 and is connected to the first side opening 17.

[0042] First, the valve body and the end of the pipe to be welded are clamped and fixed by two sets of clamping components 7 before welding. During the connection and fixing, the rotating sleeve 11 on the side of the mounting component 4 is fitted onto the inner side of the weld at the position to be welded. During the actual welding process, the rotating mechanism 5 is activated, which drives the rotation of the second gear 54. This ensures that the first gear 12 on the outside of the rotating tube 10 rotates during the rotation, thereby rotating the rotating sleeve 11. This causes the molten droplets generated during the welding process to be centrifugally thrown away by the rotating sleeve 11 when they fall, thus protecting the inside of the valve body and the end of the pipe to be welded. This effectively prevents the molten droplets from falling inside and forming metal protrusions, ensuring that the inner wall of the shut-off valve is clean and smooth, greatly improving the quality and aesthetics of the actual weld, and resulting in good performance.

[0043] Furthermore, the fixed pipe 8 sleeved in the rotating pipe 10, along with the retaining ring 23 on the outside, supports the rotating pipe 10. Simultaneously, with the movable plug 14 and positioning plate 15 in the rotating pipe 10, the rotating sleeve 11 is rotated by the rotating mechanism 5. At the same time, the air supply mechanism 25 is installed to input the air volume generated by the rotation into the fixed pipe 8, thereby pushing the positioning plate 15 to move. With the positioning plate 15 and the limiting rod 9 on the other side in a positioning engagement, the two sets of mounting components 4 can be rotated synchronously by rotating one set of mounting components 4. This allows the valve body and the end of the pipe to be welded to rotate synchronously and stably at different angles, adapting to different welding angles. This avoids the need to rotate and adjust the valve body and the pipe end in the welding state, improving the convenience of rotation while maintaining the stability of the initial welding, resulting in good performance.

[0044] Second embodiment: After welding is completed, the clamping assembly 7 of the right clamping valve body is reset, and the electric push rod 30 is started again, so that the movable plate 3 is moved away by a certain distance. As the air supply mechanism 25 continues to supply air into the fixed pipe 8, the movable plug 14 moves further and opens the first side port 17, so that the incoming air enters the second annular groove 22 through the first side port 17, and is blown out through the second side port 18 and the third side port 19. The blown air is blown out along the arc groove 20, and rotates and blows towards the welded position when the rotating sleeve 11 rotates, so that the welded position cools down quickly.

[0045] First, by reusing the connection between the air supply mechanism 25 and the fixed pipe 8, after welding is completed, the clamping assembly 7 on one side of the reset valve body is used to move the movable plate 3 and the limiting rod 9, thereby releasing the limitation on the positioning plate 15. This allows the gas supplied to the fixed pipe 8 to push the movable plug 14 to open the first side port 17. Then, during the rotation, the air volume is guided to the arc groove 20 on the outside of the rotating sleeve 11. After welding, while maintaining rotation, the welding position is rapidly cooled from the inside. The actual cooling effect is good. From welding to cooling from the inside, the process is continuous and fast, and the usage effect is good.

[0046] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, the mounting assembly 4 includes a rotating disk 41, a connecting plate 42, a rotating ring 43, and a pull rod 44. The connecting plate 42 and the pull rod 44 are respectively fixedly connected to the inner and outer sides of the rotating disk 41. The connecting plate 42 is arranged in a ring and fixedly connected to the mounting cylinder 6. The rotating ring 43 is fixedly sleeved on the outer surface of the rotating disk 41. The motor frame 51 is fixedly installed on the inner side of the rotating disk 41. The motor 52 is fixedly installed in the motor frame 51. The rotating shaft 53 is fixedly connected to the output shaft of the motor 52. The second gear 54 is fixedly sleeved. The air supply frame 251 is fitted onto the outer surface of the rotating shaft 53. The fan blade 252 is located in the air supply frame 251 and is fixedly fitted onto the outer surface of the rotating shaft 53. The connecting pipe 253 is fixedly connected between the air supply frame 251 and the fixed pipe 8. The air inlet 255 is opened on the end face of the air supply frame 251 and is close to the side of the second gear 54. The first sealing ring 254 is fixedly installed in the inner surface of the air supply frame 251 and is located on the outer side of the rotating shaft 53. The connecting pipe 253 is connected to the side hole 24.

[0047] During use, the mounting cylinder 6 is fixed by the mounting component 4, and the clamping component 7 is stably installed. The rotating ring 43 is fitted with the third ring groove 26 to maintain stable rotation. The two sets of mounting components 4 are respectively clamped and fixed to the valve body and the end of the pipe to be welded. The rotating mechanism 5 provides the rotation power of the rotating sleeve 11. At the same time, the fan blade 252 in the air supply mechanism 25 provides air volume. The air volume is used to provide the thrust of the positioning plate 15 to achieve synchronous rotation, and guide the air outlet to achieve air cooling. The first sealing ring 254 improves the dynamic seal on the rotating shaft 53 and maintains the air volume guidance. The air inlet 255 is used to draw in air from the environment.

[0048] like Figure 1 , Figure 2 and Figure 3 As shown, the clamping assembly 7 includes a side frame 71, an inner frame 72, a clamping plate 73, and a second spring 74. The side frame 71 is fixedly connected to the end face of the mounting cylinder 6 and is distributed in a ring with equal intervals. The inner frame 72 is fixedly sleeved inside the side frame 71. The clamping plate 73 is movably sleeved inside the inner frame 72. The second spring 74 is fixedly connected inside the side frame 71 and fixedly connected to the bottom of the clamping plate 73. The inner end area of ​​the clamping plate 73 is larger than the outer end area. The cylinder 6 has an annular cavity 32 inside. The outer surface and end face of the cylinder 6 are respectively provided with an outer annular groove 35 and a through hole 31. The two ends of the through hole 31 are connected to the annular cavity 32 and the side frame 71 respectively. The outer annular groove 35 is connected to the annular cavity 32. A second sealing ring 34 is movably sleeved inside the annular cavity 32. A threaded sleeve 33 is threadedly sleeved in the annular cavity 32 and the outer annular groove 35. The threaded sleeve 33 is fixedly connected to the second sealing ring 34. Lubricating oil is injected into the annular cavity 32 and the through hole 31.

[0049] During use, the elasticity of the second spring 74 in the clamping assembly 7 facilitates reset, and when the lubricating oil is squeezed into the interior, it pushes the clamping plate 73 to extend and move out, completing the clamping and fixing from the inside out. The clamping plate 73 with a larger bottom area works with the inner frame 72 to achieve movement limit, maintain stability and sliding seal. By rotating the threaded sleeve 33, the second sealing ring 34 is driven to move laterally in the ring cavity 32, squeezing the internal lubricating oil, and working with the through hole 31 to squeeze the lubricating oil into the side frame 71, realizing the movement control of the clamping plate 73 and completing the active clamping operation.

[0050] like Figure 1 , Figure 7 , Figure 8 and Figure 9 As shown, the fixed plate 2 is fixedly connected to the top of the base 1, and the movable plate 3 is slidably sleeved on the top of the base 1. Both the fixed plate 2 and the movable plate 3 have a third annular groove 26 inside. A damping ring 27 is fixedly sleeved inside the third annular groove 26. The rotating ring 43 is rotatably sleeved in the third annular groove 26. Two rotating disks 41 are rotatably sleeved inside the fixed plate 2 and the movable plate 3, respectively. The end face of the limiting rod 9 has a limiting groove 13. The cross-sectional dimensions of the limiting groove 13 are adapted to the cross-sectional dimensions of the positioning plate 15. The limiting rod 9 is located on the side closer to the movable plate 3. The fixed tube 8 is located on the side closer to the fixed plate 2. The top of the base 1 has a sliding groove 28. A round rod 29 and an electric push rod 30 are fixedly installed inside the sliding groove 28, respectively. The movable plate 3 is slidably sleeved in the sliding groove 28 and movably sleeved on the outside of the round rod 29. The movable end of the electric push rod 30 is fixedly connected to the movable plate 3.

[0051] During use, by utilizing the damping ring 27 located outside the rotating ring 43, the frictional damping effect ensures that the mounting component 4 is stably sleeved in the fixed plate 2 and the movable plate 3 under non-external force, preventing random rotation. Furthermore, the limiting groove 13 on the end face of the limiting rod 9 is adapted to the sleeve of the positioning plate 15, which restricts the movement of the positioning plate 15. On the one hand, it enables the synchronous rotation of the two sets of mounting components 4, and on the other hand, it restricts the movement of the positioning plate 15 to seal the first side opening 17. When it is removed, the limiting is released and the first side opening 17 is opened to achieve ventilation guidance, thereby achieving heat dissipation and cooling. The movement of the movable plate 3 is provided by the electric push rod 30.

[0052] A method for using a welding auxiliary device for a gate valve includes the following operating steps:

[0053] Step 1: Place the end of the pipe to be welded on the outside of the rotating sleeve 11 and on the outside of the left clamping assembly 7. Rotate the threaded sleeve 33 on the mounting cylinder 6, so that the second sealing ring 34 squeezes the lubricating oil in the ring cavity 32, so that the lubricating oil enters the clamping assembly 7 through the through hole 31, so that the clamping plate 73 in the clamping assembly 7 extends outward and clamps and fixes from the inside of the pipe end. Similarly, the valve body is sleeved and clamped on the outside of the right clamping assembly 7.

[0054] Step 2: Start the electric push rod 30, so that the movable plate 3 drives a set of mounting components 4 on the side and the valve body to move laterally and approach the clamped and fixed pipe end, so that the end to be welded is close. Start the rotating mechanism 5, so that the second gear 54 in the rotating mechanism 5 drives the first gear 12 on the rotating tube 10 to rotate, so that the rotating tube 10 drives the rotating sleeve 11 to rotate, and the rotating sleeve 11 rotates inside the weld position.

[0055] Step 3: Using a welding device, weld along the top of the valve body and the pipe end to be welded with an arc-shaped gap. As the molten droplets fall downward during the welding process, the rotating sleeve 11 rotates to centrifugally throw out the molten droplets, break them, and refill them into the weld. At the same time, when the rotating mechanism 5 rotates, it drives the fan blades 252 in the air supply mechanism 25 to rotate and generate axial airflow towards the rear. The airflow enters the fixed pipe 8 through the connecting pipe 253 and pushes the internal movable plug 14 and positioning plate 15 to move, compressing the first spring 16, so that the positioning plate 15 is inserted into the limiting groove 13 of the right limiting rod 9.

[0056] Step 4: After completing the welding of the arc spacing at one end of the top, pull the pull rod 44 in the mounting assembly 4 to rotate the mounting assembly 4 and adjust its angle. At the same time, the positioning plate 15 in the fixed pipe 8 drives the limit rod 9 to rotate, which in turn drives the rotation of the other side of the mounting assembly 4, so that the pipe opening to be welded and the valve body rotate synchronously. After rotation, the welding of the remaining parts to be welded is carried out to complete the welding.

[0057] Step 5: After welding is completed, reset the clamping assembly 7 of the right clamping valve body, and start the electric push rod 30 again, so that the movable plate 3 moves away a certain distance. As the air supply mechanism 25 continues to supply air into the fixed pipe 8, the movable plug 14 moves further, opening the first side port 17, so that the incoming air enters the second annular groove 22 through the first side port 17, and is blown out through the second side port 18 and the third side port 19. The blown air is blown out along the arc groove 20, and rotates and blows towards the welded position when the rotating sleeve 11 rotates, so that the welded position cools down quickly.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding auxiliary device for a gate valve, comprising a base (1), a fixed plate (2), and a movable plate (3), characterized in that: The sides of the fixed plate (2) and the movable plate (3) are rotatably connected to the mounting components (4). The ends of the two mounting components (4) are fixedly mounted with mounting cylinders (6). The end face of the mounting cylinders (6) is fixedly connected to the clamping components (7). The sides of one mounting component (4) are respectively fixedly mounted with a fixed tube (8) and a rotating mechanism (5). The side of the other mounting component (4) is fixedly mounted with a limit rod (9). The outer surface of the fixed tube (8) is rotatably sleeved with a rotating tube (10). The outer surface of the rotating tube (10) is fixedly sleeved with a first gear (12). The outer surface of the rotating tube (10) is fixedly sleeved with a rotating sleeve (11). The side of the fixed tube (8) is fixedly connected to the air supply mechanism (2). 5) The fixed tube (8) is movably fitted with a movable plug (14), and a positioning plate (15) is fixedly connected to the side of the movable plug (14). A first spring (16) is fixedly connected to the side of the movable plug (14). A first side opening (17) is opened on the outer surface of the fixed tube (8). A second side opening (18) and a second annular groove (22) that communicate with each other are opened on the outer and inner surfaces of the rotating tube (10). A third side opening (19) and an arc groove (20) are opened on the inner and outer surfaces of the rotating sleeve (11). A side hole (24) is opened on the outer surface of the fixed tube (8). The inner and outer ends of the third side opening (19) are connected to the arc groove (20) and the second side opening (18) respectively. The rotating mechanism (5) includes a motor frame (51), a motor (52), a rotating shaft (53), and a second gear (54), which meshes with the first gear (12). The air supply mechanism (25) includes an air supply frame (251), a fan blade (252), a connecting pipe (253), a first sealing ring (254), and an air inlet (255).

2. The welding auxiliary device for a gate valve according to claim 1, characterized in that: The outer surface of the fixed tube (8) is fixedly sleeved with a retaining ring (23), and the inner surface of the rotating tube (10) is provided with a first ring groove (21). The inner surface of the first ring groove (21) is rotatably sleeved with the retaining ring (23). The second ring groove (22) is located outside the first side opening (17) and is connected to the first side opening (17).

3. The welding auxiliary device for a gate valve according to claim 1, characterized in that: The mounting assembly (4) includes a rotating disk (41), a connecting plate (42), a rotating ring (43), and a pull rod (44). The connecting plate (42) and the pull rod (44) are fixedly connected to the inner and outer sides of the rotating disk (41), respectively. The connecting plate (42) is distributed in a ring and fixedly connected to the mounting cylinder (6). The rotating ring (43) is fixedly sleeved on the outer surface of the rotating disk (41).

4. The welding auxiliary device for a gate valve according to claim 1, characterized in that: The motor frame (51) is fixedly installed on the inner side of the rotating disk (41), the motor (52) is fixedly installed in the motor frame (51), the rotating shaft (53) is fixedly connected to the output shaft of the motor (52), the second gear (54) is fixedly sleeved on the outer surface of the rotating shaft (53), the air supply frame (251) is sleeved on the outer side of the rotating shaft (53), the fan blade (252) is located in the air supply frame (251) and fixedly sleeved on the outer surface of the rotating shaft (53), the connecting pipe (253) is fixedly connected between the air supply frame (251) and the fixed pipe (8), the air inlet (255) is opened on the end face of the air supply frame (251) and close to the side of the second gear (54), the first sealing ring (254) is fixedly installed in the inner surface of the air supply frame (251) and located on the outer side of the rotating shaft (53), and the connecting pipe (253) is connected to the side hole (24).

5. The welding auxiliary device for a gate valve according to claim 1, characterized in that: The clamping assembly (7) includes a side frame (71), an inner frame (72), a clamping plate (73), and a second spring (74). The side frame (71) is fixedly connected to the end face of the mounting cylinder (6) and is distributed in a ring with equal spacing. The inner frame (72) is fixedly sleeved inside the side frame (71). The clamping plate (73) is movably sleeved inside the inner frame (72). The second spring (74) is fixedly connected inside the side frame (71) and fixedly connected to the bottom of the clamping plate (73). The inner end area of ​​the clamping plate (73) is larger than the outer end area.

6. The welding auxiliary device for a gate valve according to claim 5, characterized in that: The mounting cylinder (6) has an annular cavity (32) inside. The outer surface and end face of the mounting cylinder (6) are respectively provided with an outer annular groove (35) and a through hole (31). The two ends of the through hole (31) are respectively connected to the annular cavity (32) and the side frame (71). The outer annular groove (35) is connected to the annular cavity (32).

7. The welding auxiliary device for a gate valve according to claim 6, characterized in that: The second sealing ring (34) is movably sleeved inside the annular cavity (32). A threaded sleeve (33) is threadedly sleeved in the annular cavity (32) and the outer annular groove (35). The threaded sleeve (33) is fixedly connected to the second sealing ring (34). Lubricating oil is injected into the annular cavity (32) and the through hole (31).

8. The welding auxiliary device for a gate valve according to claim 3, characterized in that: The fixed plate (2) is fixedly connected to the top of the base (1), and the movable plate (3) is slidably sleeved on the top of the base (1). The fixed plate (2) and the movable plate (3) are both provided with a third annular groove (26). A damping ring (27) is fixedly sleeved inside the third annular groove (26). The rotating ring (43) is rotatably sleeved in the third annular groove (26). The two rotating disks (41) are respectively rotatably sleeved inside the fixed plate (2) and the movable plate (3). The end face of the limiting rod (9) is provided with a limiting groove (13). The cross-sectional dimensions of the limiting groove (13) are adapted to the cross-sectional dimensions of the positioning plate (15). The limiting rod (9) is located on the side closer to the movable plate (3), and the fixed tube (8) is located on the side closer to the fixed plate (2).

9. The welding auxiliary device for a gate valve according to claim 1, characterized in that: The top of the base (1) is provided with a sliding groove (28). A round rod (29) and an electric push rod (30) are fixedly installed inside the sliding groove (28). The movable plate (3) is slidably sleeved in the sliding groove (28) and movably sleeved on the outside of the round rod (29). The movable end of the electric push rod (30) is fixedly connected to the movable plate (3).

Images