A high-pressure stop valve welding work turntable and method

Abstract

This invention relates to the field of welding turntable technology, and discloses a high-pressure shut-off valve welding turntable and method, comprising: an operation box and a turntable rotatably connected inside the operation box, and further comprising: an operation table fixedly connected to the top of the turntable, and an alignment assembly disposed inside the operation table for centering the high-pressure shut-off valve. The alignment assembly includes two support sliders slidably connected to the top of the operation table. By using the alignment assembly, the high-pressure shut-off valve is placed on the top of the operation table. The gas source inside the gas box enters the interior of the push cylinder through the air inlet pipe. The push plate drives the sliding plate to move through the push rod. One sliding plate drives the other sliding plate to move through the hinge plate and the connecting plate. The sliding plate drives the first chuck and the second chuck to move closer to each other through the support sliders. The first chuck and the second chuck push the high-pressure shut-off valve to the center of the operation table, thereby achieving the effect of center alignment.

Description

Technical Field

[0001] This invention relates to the field of welding turntable technology, specifically to a high-pressure shut-off valve welding turntable and method. Background Technology

[0002] A high-pressure gate valve is a forced-seal valve primarily used in high-pressure pipeline systems to cut off, distribute, and change the flow direction of media. It works by applying pressure from the valve stem to ensure a tight seal between the valve disc's sealing surface and the valve seat's sealing surface, thus preventing media flow. The media flow direction is typically designed from top to bottom to enhance the sealing effect. To ensure the stability of the high-pressure gate valve, it is usually welded onto a turntable.

[0003] CN117428414B discloses a rotary table device for welding gate valves, belonging to the field of valve processing technology. It includes a revolution mechanism and a rotation mechanism. The revolution mechanism comprises a frame, a turntable, and a revolution drive shaft. A revolution base plate is located at the top of the frame. The turntable and the revolution base plate are connected via a first thrust bearing. The revolution drive shaft is rotatably engaged with the revolution base plate and is coaxial with the first thrust bearing. The upper end of the revolution drive shaft is connected to the turntable. The rotation mechanism includes a rotation motor and several gate valve positioning discs. These discs are circumferentially arranged on the turntable, and the rotation motor drives any one of the gate valve positioning discs to rotate. The rotation of the turntable enables the loading, unloading, and transfer of valve bodies to the welding station, while the rotation of the gate valve positioning discs facilitates the welding of the valve bodies.

[0004] While the aforementioned applications and prior art are applicable to the mass welding of gate valve bodies, when using a turntable to weld the interior of a high-pressure gate valve, the center of the high-pressure gate valve deviates from the position of the welding torch, thus affecting the welding quality. Furthermore, using the two-end alignment method for center alignment of the high-pressure gate valve causes the position of the high-pressure gate valve to shift during subsequent rotation, thus affecting the welding. Moreover, using the two-end alignment method for limiting the position causes the internal temperature of the high-pressure gate valve to rise during the welding process, leading to thermal damage. Therefore, this application proposes a high-pressure gate valve welding turntable and method. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a high-pressure shut-off valve welding turntable and method, which has advantages such as center alignment, prevention of offset, and avoidance of thermal damage. It solves the problems of the aforementioned applications and existing technologies, where using a turntable to weld the interior of a high-pressure shut-off valve can cause a deviation between the center of the high-pressure shut-off valve and the position of the welding torch, thus affecting the welding quality. Furthermore, using a two-end alignment method for center alignment can cause the high-pressure shut-off valve to shift position during rotation, affecting the welding process. Additionally, using a two-end alignment method for limiting the position can cause the internal temperature of the high-pressure shut-off valve to rise during welding, leading to thermal damage.

[0006] (II) Technical Solution To achieve the aforementioned objectives of center alignment, prevention of misalignment, and avoidance of thermal damage, this invention provides the following technical solution: a high-pressure shut-off valve welding turntable, comprising: an operating box and a turntable rotatably connected inside the operating box, and further comprising: An operating platform is fixedly connected to the top of the rotating platform, a gas box is fixedly connected to the bottom of the rotating platform, and a welding head is provided inside the operating box; A centering assembly is disposed inside the control panel and is used to center-align the high-pressure shut-off valve. The centering assembly includes two support sliders slidably connected to the top of the control panel, and a first chuck and a second chuck are respectively fixedly connected to the top of the two support sliders. An anti-deviation assembly is installed inside the first chuck and the second chuck to prevent the high-pressure shut-off valve from rotating inside the centering assembly when it is rotating. The anti-damage component is installed inside the first chuck and the second chuck to prevent temperature damage to the core component and the high-pressure shut-off valve during welding.

[0007] Furthermore, the centering assembly also includes two fixed plates fixedly connected inside the operating table, a plurality of guide rods fixedly connected between the two fixed plates, two sliding plates slidably connected to the surfaces of the guide rods, and the tops of the two sliding plates fixedly connected to the bottoms of the two supporting sliders.

[0008] Furthermore, a support plate is fixedly connected to the bottom of the two fixed plates, a connecting plate is rotatably connected to the top of the support plate, and a hinge plate is rotatably connected to the bottom of the two sliding plates. The end of the hinge plate away from the sliding plate is rotatably connected to one end of the connecting plate.

[0009] Furthermore, the centering assembly also includes a push cylinder fixedly connected to one side of one of the fixed plates. A push disk is slidably connected inside the push cylinder. A push rod is fixedly connected to one side of the push disk. One end of the push rod is fixedly connected to one end of the sliding plate. A first spring is fixedly connected between one end of the push disk and the inside of the push cylinder. The push cylinder is connected to the gas box through an air inlet pipe.

[0010] Furthermore, the anti-deviation component includes a storage cavity formed inside the first chuck and the second chuck. An offset cylinder is slidably connected inside the storage cavity. A second spring is fixedly connected between one end of the offset cylinder and the storage cavity. The storage cavity and the push cylinder are connected through a first connecting pipe. A first pressure relief valve is provided on the surface of the first connecting pipe.

[0011] Furthermore, a second pressure relief valve is provided on one side of the offset cylinder, an expansion air bladder is fixedly connected to the surface of the offset cylinder, an exhaust pipe is fixedly connected to the surface of the receiving cavity, and a third pressure relief valve is provided on the surface of the exhaust pipe.

[0012] Furthermore, the damage prevention component includes an air inlet cylinder fixedly connected inside the first chuck and an exhaust cylinder fixedly connected inside the second chuck. The air inlet cylinder is fixedly connected to one end of one of the exhaust pipes. An air intake pipe and an air outlet pipe are fixedly connected to the surface of the exhaust cylinder. An air intake valve is provided inside the air intake pipe, an exhaust valve is provided inside the air outlet pipe, and an exhaust duct is fixedly connected to the surface of the air outlet pipe.

[0013] Furthermore, the damage prevention component also includes a protective box fixedly connected to one side of the second chuck. A mounting plate is fixedly connected inside the protective box. The mounting plate is fixedly connected to one end of another exhaust pipe. A rotating rod is rotatably connected inside the mounting plate. Several fixing plates are fixedly connected to the surface of the rotating rod inside the mounting plate. A rotating disk is fixedly connected to one end of the rotating rod. A hinge rod is rotatably connected to the surface of the rotating disk through a support rod. A suction disk is hinged to one end of the hinge rod. The suction disk is slidably connected inside the exhaust pipe.

[0014] Furthermore, the surface of the control box is provided with a control panel, a rotary motor is fixedly connected inside the control box, a rotary rod is fixedly connected to the output end of the rotary motor, and the top of the rotary rod is fixedly connected to the bottom of the rotating table.

[0015] This invention also provides a method for using a high-pressure shut-off valve welding turntable, which specifically includes the following steps: Step 1: Place the high-pressure shut-off valve on the top of the control panel, and activate the centering assembly to push the high-pressure shut-off valve to the center of the control panel. Step 2: After the centering assembly pushes the high-pressure shut-off valve, drive the anti-deviation assembly so that the anti-deviation assembly is inserted into the inlet and outlet of the high-pressure shut-off valve, thereby preventing the high-pressure shut-off valve from shaking when the rotating table rotates. Step 3: After the anti-deviation component is completed, drive the anti-damage component to blow and suck air into the high-pressure shut-off valve, thereby avoiding heat damage during welding. Step 4: Move the welding head inside the control box to the inside of the high-pressure shut-off valve, so that the welding head can weld a part of the high-pressure shut-off valve. Step 5: Drive the rotating table to rotate, so that the rotating table drives the high-pressure shut-off valve to rotate through the operating table, thereby enabling the welding head to perform full welding on the inside of the high-pressure shut-off valve.

[0016] (III) Beneficial Effects Compared with the prior art, the present invention provides a high-pressure shut-off valve welding turntable and method, which has the following beneficial effects: 1. The high-pressure shut-off valve welding turntable and method, through the use of the centering component, places the high-pressure shut-off valve on the top of the operating table. The gas source inside the gas box enters the interior of the push cylinder through the air inlet pipe, causing the push plate to move the sliding plate through the push rod. One sliding plate moves the other sliding plate through the hinge plate and connecting plate, causing the sliding plate to move the first chuck and the second chuck closer to each other through the support slider. In turn, the first chuck and the second chuck push the high-pressure shut-off valve to the center of the operating table, thereby achieving the effect of center alignment.

[0017] 2. The welding turntable and method for the high-pressure shut-off valve, through the coordinated use of the centering component and the anti-deviation component, ensures that when the support slider stops moving, as the air source is continuously injected into the push cylinder, when the threshold of the first pressure relief valve is reached, the air source inside the push cylinder enters the receiving chamber through the first connecting pipe, causing the offset cylinder to extend and insert into both ends of the high-pressure shut-off valve. As the gas is continuously injected, when the threshold of the second pressure relief valve is reached, the air source inside the receiving chamber is injected into the expansion bladder through the offset cylinder, causing the expansion bladder to support the interior of the high-pressure shut-off valve. Therefore, when the high-pressure shut-off valve is rotating, the high-pressure shut-off valve will not deviate at the top of the operating table, thus achieving the effect of preventing deviation.

[0018] 3. The welding turntable and method for the high-pressure shut-off valve utilizes the combined use of anti-deviation and anti-damage components. When the air source inside the expansion bladder and the receiving chamber is continuously injected, and the threshold of the third pressure relief valve is reached, the air source inside the receiving chamber is injected into the air inlet cylinder and the mounting plate through the exhaust pipe. This causes the air inlet cylinder to blow air into the inlet of the high-pressure shut-off valve. When the air source enters the mounting plate, it drives the rotating rod to rotate through the fixed plate. The rotating rod then drives the hinge rod to reciprocate through the rotating plate. This causes the hinge rod to drive the suction plate to slide reciprocally inside the exhaust cylinder. This allows the air inside the high-pressure shut-off valve to enter the exhaust cylinder through the suction pipe, and then enter the exhaust duct through the exhaust pipe and be discharged. By continuously injecting and extracting air, the heat inside the high-pressure shut-off valve is discharged, thus avoiding heat damage to the high-pressure shut-off valve caused by welding, thereby achieving the effect of avoiding heat damage.

[0019] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional perspective view of the three-dimensional structure of the operating box of the present invention; Figure 3 This is a three-dimensional schematic diagram of the internal structure of the control box of the present invention; Figure 4 This is a cross-sectional perspective view of the rotating platform and operating platform of the present invention. Figure 5 This is a three-dimensional schematic diagram of the internal structure of the rotating table and operating table of the present invention; Figure 6 This is a three-dimensional schematic diagram of the internal structure of the rotating platform and operating platform of the present invention from another perspective; Figure 7 This is a schematic diagram of the three-dimensional structure of the supporting slider of the present invention; Figure 8 This is a three-dimensional structural diagram of the core component of the present invention; Figure 9 This is a cross-sectional three-dimensional structural diagram of the push tube of the present invention; Figure 10 This is a cross-sectional perspective view of the first chuck of the present invention. Figure 11 This is a schematic diagram of the three-dimensional structure of the offset cylinder of the present invention; Figure 12 This is a cross-sectional perspective view of the exhaust stack of the present invention. Figure 13 For the present invention Figure 12 Enlarged schematic diagram of the structure at point A in the middle; Figure 14 This is a cross-sectional three-dimensional structural diagram of the mounting disc of the present invention.

[0021] In the diagram: 1. Control box; 11. Control panel; 12. Rotary motor; 121. Rotary table; 122. Control panel; 123. Gas box; 2. Alignment assembly; 21. Fixing plate; 211. Guide rod; 212. Sliding plate; 213. Support plate; 214. Connecting plate; 215. Hinge plate; 22. Push cylinder; 221. Push disc; 222. Push rod; 223. First spring; 224. Inlet pipe; 225. First connecting pipe; 226. First pressure relief valve; 23. Support slider; 231. First chuck; 232. 2. Chuck; 3. Anti-deviation assembly; 31. Storage cavity; 311. Offset cylinder; 312. Second spring; 313. Second pressure relief valve; 314. Inflation airbag; 32. Exhaust pipe; 321. Third pressure relief valve; 4. Damage protection assembly; 41. Air inlet cylinder; 42. Protective box; 43. Exhaust cylinder; 431. Suction pipe; 432. Air inlet valve; 433. Air outlet pipe; 434. Exhaust valve; 435. Exhaust duct; 44. Mounting plate; 441. Rotating rod; 442. Fixing plate; 443. Rotating plate; 444. Hinge rod; 445. Suction cup. Detailed Implementation

[0022] 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.

[0023] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0024] For a specific implementation example, please refer to Implementation Example 1. Figures 1 to 2 A high-pressure shut-off valve welding turntable includes: an operating box 1 and a turntable 121 rotatably connected inside the operating box 1, and further includes: The operating table 122 is fixedly connected to the top of the rotating table 121. The bottom of the rotating table 121 is fixedly connected to the gas box 123. The inside of the operating box 1 is provided with a welding head. The surface of the operating box 1 is provided with a control panel 11. The inside of the operating box 1 is fixedly connected to a rotating motor 12. The output end of the rotating motor 12 is fixedly connected to a rotating rod. The top of the rotating rod is fixedly connected to the bottom of the rotating table 121. The centering assembly 2 is located inside the operating table 122 and is used to center the high pressure shut-off valve. The centering assembly 2 includes two support sliders 23 that are slidably connected to the top of the operating table 122. The top of the two support sliders 23 are respectively fixedly connected to a first chuck 231 and a second chuck 232. The anti-deviation component 3 is located inside the first chuck 231 and the second chuck 232 to prevent the high-pressure shut-off valve from rotating inside the centering component 2 when it is rotating. The anti-damage component 4 is located inside the first chuck 231 and the second chuck 232 to prevent the high-pressure shut-off valve from being damaged by the temperature generated during welding. It should be noted that the first chuck 231 and the second chuck 232 are equipped with a three-jaw chuck inside. The three-jaw chuck can expand outward, thereby supporting the inlet and outlet of the high-pressure shut-off valve through the expansion of the three-jaw chuck. When the high-pressure shut-off valve needs to be placed on top of the operating table 122 for rotation, the high-pressure shut-off valve is placed on top of the operating table 122, the centering assembly 2 is used to center the high-pressure shut-off valve, then the anti-deviation assembly 3 is used to limit the high-pressure shut-off valve, then the anti-damage assembly 4 is used to cool the inside of the high-pressure shut-off valve, then the welding head is moved to the inside of the high-pressure shut-off valve, the rotating motor 12 is started, the rotating motor 12 drives the rotating table 121 to rotate through the rotating rod, so that the rotating table 121 drives the support slider 23 to rotate through the operating table 122, and then the support slider 23 rotates the high-pressure shut-off valve through the first chuck 231 and the second chuck 232, so that the welding head welds on the high-pressure shut-off valve through the rotation of the high-pressure shut-off valve; For a specific embodiment two, please refer to Figures 1 to 9 Based on the high-pressure shut-off valve welding turntable provided in Specific Embodiment 1, this embodiment provides a further technical solution: The centering assembly 2 also includes two fixed plates 21 fixedly connected inside the operating table 122. A plurality of guide rods 211 are fixedly connected between the two fixed plates 21. Two sliding plates 212 are slidably connected to the surfaces of the guide rods 211. The tops of the two sliding plates 212 are fixedly connected to the bottoms of two support sliders 23. A support plate 213 is fixedly connected to the bottom of the two fixed plates 21. A connecting plate 214 is rotatably connected to the top of the support plate 213. A hinge plate 215 is rotatably connected to the bottom of each of the two sliding plates 212. The hinge plate 215 is located far from... One end of the sliding plate 212 is rotatably connected to one end of the connecting plate 214. The centering assembly 2 also includes a push cylinder 22 fixedly connected to one side of one of the fixed plates 21. A push disk 221 is slidably connected inside the push cylinder 22. A push rod 222 is fixedly connected to one side of the push disk 221. One end of the push rod 222 is fixedly connected to one end of the sliding plate 212. A first spring 223 is fixedly connected between one end of the push disk 221 and the inside of the push cylinder 22. The push cylinder 22 and the gas box 123 are connected through an air inlet pipe 224. It should be noted that the first connecting pipe 225 is telescopic; When it is necessary to align the center point of the high-pressure shut-off valve with the center point of the welding head, the high-pressure shut-off valve is placed on the top of the operating table 122. The gas source inside the gas box 123 enters the interior of the push cylinder 22 through the air inlet pipe 224, causing the push plate 221 to move the sliding plate 212 through the push rod 222. One sliding plate 212 moves the other sliding plate 212 through the hinge plate 215 and the connecting plate 214. The sliding plate 212 moves the first chuck 231 and the second chuck 232 closer to each other through the support slider 23. Then, the first chuck 231 and the second chuck 232 push the high-pressure shut-off valve to the center of the operating table 122, thereby aligning the center point of the high-pressure shut-off valve with the center point of the welding head. For a specific embodiment three, please refer to Figures 1 to 11 Based on the high-pressure shut-off valve welding turntable provided in Specific Embodiment 2, this embodiment provides a further technical solution: The anti-deviation assembly 3 includes a storage cavity 31 opened inside the first chuck 231 and the second chuck 232. An offset cylinder 311 is slidably connected inside the storage cavity 31. A second spring 312 is fixedly connected between one end of the offset cylinder 311 and the storage cavity 31. The storage cavity 31 and the push cylinder 22 are connected through a first connecting pipe 225. A first pressure relief valve 226 is provided on the surface of the first connecting pipe 225. A second pressure relief valve 313 is provided on one side of the offset cylinder 311. An expansion airbag 314 is fixedly connected to the surface of the offset cylinder 311. An exhaust pipe 32 is fixedly connected to the surface of the storage cavity 31. A third pressure relief valve 321 is provided on the surface of the exhaust pipe 32. It should be noted that the pressure relief thresholds of the second pressure relief valve 313 and the third pressure relief valve 321 can be adjusted; To prevent the center point of the high-pressure shut-off valve from shifting during rotation, when the support slider 23 stops moving, as the gas source is continuously injected into the push cylinder 22, when the threshold of the first pressure relief valve 226 is reached, the gas source inside the push cylinder 22 enters the receiving chamber 31 through the first connecting pipe 225, causing the offset cylinder 311 to extend and insert into both ends of the high-pressure shut-off valve. As the gas is continuously injected, when the threshold of the second pressure relief valve 313 is reached, the gas source inside the receiving chamber 31 is injected into the expansion bladder 314 through the offset cylinder 311, causing the expansion bladder 314 to support the interior of the high-pressure shut-off valve. Therefore, when the high-pressure shut-off valve rotates, the high-pressure shut-off valve will not shift at the top of the operating table 122, thereby ensuring the subsequent welding quality. For a specific implementation example, please refer to Implementation Example 4. Figures 1 to 14 Based on the high-pressure shut-off valve welding turntable provided in Specific Embodiment Three, this embodiment provides a further technical solution: Damage protection component 4 includes an air inlet cylinder 41 fixedly connected inside the first chuck 231 and an exhaust cylinder 43 fixedly connected inside the second chuck 232. The air inlet cylinder 41 is fixedly connected to one end of one of the exhaust pipes 32. An air intake pipe 431 and an air outlet pipe 433 are fixedly connected to the surface of the exhaust cylinder 43. An air intake valve 432 is provided inside the air intake pipe 431, and an exhaust valve 434 is provided inside the air outlet pipe 433. An exhaust conduit 435 is fixedly connected to the surface of the air outlet pipe 433. Damage protection component 4 also includes a component fixedly connected to one side of the second chuck 232. The protective box 42 has a mounting plate 44 fixedly connected inside it. The mounting plate 44 is fixedly connected to one end of another exhaust pipe 32. The mounting plate 44 has a rotating rod 441 rotatably connected inside it. Several fixing pieces 442 are fixedly connected to the surface of the rotating rod 441 inside the mounting plate 44. One end of the rotating rod 441 is fixedly connected to a rotating disk 443. The surface of the rotating disk 443 is rotatably connected to a hinge rod 444 through a support rod. One end of the hinge rod 444 is hinged to a suction cup 445. The suction cup 445 is slidably connected inside the exhaust pipe 43. It should be noted that the suction cup 445 is slidably connected to the surface of the exhaust duct 435. The intake valve 432 and the exhaust valve 434 are existing technologies, so they will not be described in detail here. To prevent temperature damage to the high-pressure shut-off valve and the alignment assembly 2 during welding, when air is continuously injected into the expansion bladder 314 and the receiving chamber 31, and the threshold of the third pressure relief valve 321 is reached, the air source inside the receiving chamber 31 is injected into the air inlet cylinder 41 and the mounting plate 44 through the exhaust pipe 32. This causes the air inlet cylinder 41 to blow air into the inlet of the high-pressure shut-off valve. At the same time, when the air source enters the mounting plate 44, it drives the rotating rod 441 to rotate through the fixing plate 442. The rotating rod 441 drives the hinge rod 444 to reciprocate through the rotating disk 443, which in turn drives the suction disk 445 to slide reciprocally inside the exhaust cylinder 43. This allows the air inside the high-pressure shut-off valve to enter the exhaust cylinder 43 through the suction pipe 431, and then enter the exhaust duct 435 through the exhaust pipe 433 and be discharged. By continuously injecting and extracting air, the heat inside the high-pressure shut-off valve is discharged, thereby avoiding the temperature damage to the high-pressure shut-off valve and the centering assembly 2 caused by welding. In a specific embodiment five, the present invention also provides a method for using a high-pressure shut-off valve welding turntable, which specifically includes the following steps: Step 1: Place the high-pressure shut-off valve on the top of the operating table 122, and start the centering assembly 2 to push the high-pressure shut-off valve to the center of the operating table 122. Step 2: After the centering component 2 pushes the high-pressure shut-off valve, drive the anti-deviation component 3 so that the anti-deviation component 3 is inserted into the inlet and outlet of the high-pressure shut-off valve, thereby preventing the high-pressure shut-off valve from shaking when the rotating table 121 rotates. Step 3: After the anti-deviation component 3 is completed, drive the anti-damage component 4 to blow and suck air into the high-pressure shut-off valve, thereby avoiding heat damage during welding. Step 4: Move the welding head inside the control box 1 to the inside of the high-pressure shut-off valve, so that the welding head can weld a part of the high-pressure shut-off valve. Step 5: Drive the rotating table 121 to rotate, so that the rotating table 121 drives the high-pressure shut-off valve to rotate through the operating table 122, thereby enabling the welding head to perform full welding on the interior of the high-pressure shut-off valve.

[0025] Any content not described in detail in this specification is prior art known to those skilled in the art.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism. It allows for situations where the parallelism is not absolute due to factors such as assembly tolerance, design tolerance, and structural flatness. It also allows for errors within a small angular range, such as within 10 degrees of assembly error. These can all be considered as parallel relationships.

[0028] Perpendicularity: The perpendicularity defined in this application is not limited to an absolute perpendicular intersection (with an included angle of 90 degrees). It is permissible for non-absolute perpendicular intersections caused by factors such as assembly tolerances, design tolerances, and structural flatness. It is permissible for errors within a small angular range, such as an assembly error range of 80 to 100 degrees, which can all be understood as a perpendicular relationship.

[0029] 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 high-pressure shut-off valve welding turntable, comprising: The control box (1) and the rotating platform (121) rotatably connected inside the control box (1) are characterized in that: An operating table (122) is fixedly connected to the top of the rotating table (121), and a gas box (123) is fixedly connected to the bottom of the rotating table (121). A welding head is provided inside the operating box (1). The centering assembly (2) is located inside the operating table (122) and is used to center the high pressure shut-off valve. The centering assembly (2) includes two support sliders (23) that are slidably connected to the top of the operating table (122). The top of the two support sliders (23) are respectively fixedly connected to a first chuck (231) and a second chuck (232). The anti-deviation component (3) is disposed inside the first chuck (231) and the second chuck (232) to prevent the high pressure shut-off valve from rotating inside the centering component (2) when the high pressure shut-off valve is rotated. The anti-damage component (4) is disposed inside the first chuck (231) and the second chuck (232) to prevent the high-pressure shut-off valve from being damaged by the temperature generated during welding of the core component (2) and the high-pressure shut-off valve.

2. The high-pressure shut-off valve welding turntable according to claim 1, characterized in that: The centering assembly (2) also includes two fixed plates (21) fixedly connected inside the operating table (122). A number of guide rods (211) are fixedly connected between the two fixed plates (21). Two sliding plates (212) are slidably connected to the surfaces of the guide rods (211). The tops of the two sliding plates (212) are fixedly connected to the bottoms of the two support sliders (23).

3. The high-pressure shut-off valve welding turntable according to claim 2, characterized in that: The bottom of the two fixed plates (21) is fixedly connected to a support plate (213), the top of the support plate (213) is rotatably connected to a connecting plate (214), and the bottom of the two sliding plates (212) is rotatably connected to a hinge plate (215). The end of the hinge plate (215) away from the sliding plate (212) is rotatably connected to the end of the connecting plate (214).

4. The high-pressure shut-off valve welding turntable according to claim 2, characterized in that: The centering assembly (2) also includes a push cylinder (22) fixedly connected to one side of one of the fixed plates (21). A push disk (221) is slidably connected inside the push cylinder (22). A push rod (222) is fixedly connected to one side of the push disk (221). One end of the push rod (222) is fixedly connected to one end of the sliding plate (212). A first spring (223) is fixedly connected between one end of the push disk (221) and the inside of the push cylinder (22). The push cylinder (22) and the gas box (123) are connected through an air inlet pipe (224).

5. A high-pressure shut-off valve welding turntable according to claim 4, characterized in that: The anti-deviation component (3) includes a storage cavity (31) opened inside the first chuck (231) and the second chuck (232). An offset cylinder (311) is slidably connected inside the storage cavity (31). A second spring (312) is fixedly connected between one end of the offset cylinder (311) and the storage cavity (31). The storage cavity (31) and the push cylinder (22) are connected through a first connecting pipe (225). A first pressure relief valve (226) is provided on the surface of the first connecting pipe (225).

6. A high-pressure shut-off valve welding turntable according to claim 5, characterized in that: A second pressure relief valve (313) is provided on one side of the offset cylinder (311), an expansion airbag (314) is fixedly connected to the surface of the offset cylinder (311), an exhaust pipe (32) is fixedly connected to the surface of the receiving cavity (31), and a third pressure relief valve (321) is provided on the surface of the exhaust pipe (32).

7. A high-pressure shut-off valve welding turntable according to claim 6, characterized in that: The damage prevention component (4) includes an air inlet cylinder (41) fixedly connected inside the first chuck (231) and an exhaust cylinder (43) fixedly connected inside the second chuck (232). The air inlet cylinder (41) is fixedly connected to one end of one of the exhaust pipes (32). The surface of the exhaust cylinder (43) is fixedly connected to an air intake pipe (431) and an air outlet pipe (433). An air intake valve (432) is provided inside the air intake pipe (431). An exhaust valve (434) is provided inside the air outlet pipe (433). An exhaust duct (435) is fixedly connected to the surface of the air outlet pipe (433).

8. A high-pressure shut-off valve welding turntable according to claim 7, characterized in that: The damage prevention component (4) also includes a protective box (42) fixedly connected to one side of the second chuck (232). The protective box (42) has a mounting plate (44) fixedly connected inside. The mounting plate (44) is fixedly connected to one end of another exhaust pipe (32). The mounting plate (44) has a rotating rod (441) rotatably connected inside. The surface of the rotating rod (441) and inside the mounting plate (44) has several fixing pieces (442) fixedly connected. One end of the rotating rod (441) is fixedly connected to a rotating disk (443). The surface of the rotating disk (443) is rotatably connected to a hinge rod (444) via a support rod. One end of the hinge rod (444) is hinged to a suction disk (445). The suction disk (445) is slidably connected inside the exhaust pipe (43).

9. A high-pressure shut-off valve welding turntable according to claim 1, characterized in that: The surface of the operation box (1) is provided with a control panel (11), and a rotating motor (12) is fixedly connected inside the operation box (1). A rotating rod is fixedly connected to the output end of the rotating motor (12), and the top of the rotating rod is fixedly connected to the bottom of the rotating table (121).

10. A method for using a high-pressure shut-off valve welding turntable, characterized in that: The high-pressure shut-off valve welding turntable as described in any one of claims 1-9 is used in a method that specifically includes the following steps: Step 1: Place the high-pressure shut-off valve on the top of the operating table (122), start the centering assembly (2), and make the centering assembly (2) push the high-pressure shut-off valve to the center of the operating table (122); Step 2: After the centering component (2) pushes the high pressure shut-off valve, drive the anti-deviation component (3) so that the anti-deviation component (3) is inserted into the inlet and outlet of the high pressure shut-off valve, thereby preventing the high pressure shut-off valve from shaking when the rotating table (121) rotates. Step 3: After the anti-deviation component (3) is completed, drive the anti-damage component (4) so ​​that the anti-damage component (4) blows and sucks air into the inside of the high-pressure shut-off valve, thereby avoiding heat damage during welding. Step 4: Move the welding head inside the control box (1) to the inside of the high-pressure shut-off valve so that the welding head can weld the part of the high-pressure shut-off valve. Step 5: Drive the rotating table (121) to rotate, so that the rotating table (121) drives the high pressure shut-off valve to rotate through the operating table (122), thereby enabling the welding head to perform full welding on the inside of the high pressure shut-off valve.

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