Positioning device for pipeline valve welding production

Abstract

The utility model relates to welding fixture technical field discloses a positioning device for pipeline valve welding production, including bottom box, the top rotation of bottom box is connected with wheel support, the inside of bottom box is provided with adjusting mechanism, adjusting mechanism is used for conveniently controllable adjustment device clamping angle to adapt to a variety of pipeline valve size, the adjacent side of wheel support is provided with rotating mechanism, rotating mechanism is used for rotating pipeline to change operation angle when welding operation, adjusting mechanism includes a plurality of pivot no.

Description

Technical Field

[0001] This utility model relates to the field of welding fixture technology, and in particular to a positioning device for pipeline valve welding production. Background Technology

[0002] Pipeline valve welding is a technology that connects pipelines and valves through welding. The core of the process is to use high temperature to melt and fuse the metal at the connection point, and then cool it to form a strong and sealed joint. It is widely used in chemical fluid transportation systems. Before welding, the pipeline and valve interfaces need to be cleaned, and the operation process needs to be selected according to the material. During welding, the temperature and penetration depth must be controlled to avoid cracks and porosity, ensure that the joint is pressure resistant and leak-proof, and ensure the safe operation of the system.

[0003] Positioning devices for pipeline and valve welding production are specialized equipment used to fix the relative positions of pipelines and valves during welding operations. Their core function is to ensure precise alignment and stability of the interfaces between the two, preventing joint deviations or sealing failures caused by displacement during welding. They are typically designed according to the specifications of the pipelines and valves, and include clamping mechanisms and adjustment components to adapt to different pipe diameters and valve types. They can reduce manual positioning errors, improve welding efficiency and joint quality, and are key auxiliary equipment for valve welding production in the chemical industry.

[0004] Existing positioning devices for pipeline and valve welding production have significant shortcomings in terms of clamping angle adjustment and size adaptability. The clamping angle fixing or adjustment mechanism of the device lacks precision, relies on preset positions, and cannot be manually adjusted in real time and with precision according to welding requirements. When facing non-standard welding stations, it will lead to the misfit of the pipeline and valve interface, increasing the difficulty of subsequent correction. At the same time, the size adaptability of the device is limited, and it is mostly designed for specific pipe diameters or valve specifications. It lacks an active adaptation structure. When changing workpieces of different sizes, it is necessary to disassemble and replace the clamping components, which is not only time-consuming and labor-intensive, but also causes positioning errors due to component disassembly and assembly, seriously affecting the continuity and convenience of operation, and making it difficult to meet the needs of efficient welding in diverse production scenarios. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a positioning device for pipeline valve welding production, which aims to improve the problem that the clamping angle of the existing device cannot be manually controlled and adjusted, and cannot actively adapt to pipeline valves of various sizes, thus affecting the convenience of operation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a positioning device for pipeline valve welding production, comprising a base box, a wheel frame rotatably connected to the top of the base box, an adjustment mechanism provided inside the base box, the adjustment mechanism being used to conveniently and controllably adjust the clamping angle of the device to adapt to various pipeline valve sizes, and a rotating mechanism provided on an adjacent side of the wheel frame, the rotating mechanism being used to rotate the pipeline to change the working angle during welding operations;

[0007] The adjustment mechanism includes multiple rotating shafts, the outer walls of which are rotatably connected to the bottom of the front and rear sides of the wheel frame, respectively. The outer walls of the multiple rotating shafts are rotatably connected to the top of the same base box on opposite sides. Multiple rotating shafts are rotatably connected to the bottom of the wheel frame. Two connecting rods are rotatably connected to the outer walls of each of the multiple rotating shafts. A slider is rotatably connected to the bottom of each of the multiple connecting rods. A trolley assembly is provided at the bottom of each of the multiple sliders. A worm gear is threadedly connected to an adjacent side of each of the multiple sliders. A split-action assembly is provided between adjacent worm gears. A hand crank assembly is provided on the front side of the base box.

[0008] As a further description of the above technical solution:

[0009] The adjustment mechanism also includes multiple screws, the bottom of the outer walls of the multiple screws are respectively threaded to the bottom of the inner wall of the same base box, and the top of the outer walls of the multiple screws are respectively threaded to the same motor.

[0010] As a further description of the above technical solution:

[0011] The rotating mechanism includes a plurality of screws, the outer walls of which are threaded to the left and right sides of the wheel frame on adjacent sides. The outer walls of which are threaded to the opposite sides are connected to connecting discs. The connecting discs are fixedly connected to each other with fixing pins. The outer walls of the fixing pins are slidably connected to fixing shafts. The outer walls of the fixing shafts are provided with rotating components. The outer walls of the rotating components are provided with a plurality of wheel rims. The outer surfaces of the wheel rims are provided with anti-slip components.

[0012] As a further description of the above technical solution:

[0013] The trolley assembly includes multiple rotating shafts (3), the outer walls of the multiple rotating shafts (3) are rotatably connected to the bottom of multiple sliders on the left and right sides respectively, and each of the multiple rotating shafts (3) is rotatably connected to a pulley (1). The inner walls of the base box are fixedly connected to multiple tracks on opposite sides, and the tops of the multiple tracks are slidably connected to the outer walls of the multiple pulleys (1).

[0014] As a further description of the above technical solution:

[0015] The transfer assembly includes two transmission rods 1. The front and rear ends of the two transmission rods 1 are respectively fixedly connected to the adjacent sides of a plurality of worm gears 1. The outer walls of the two transmission rods 1 are fixedly connected to bevel gears 1. The outer walls of the two bevel gears 1 are meshed with each other. The two bevel gears 2 are connected to each other. The outer walls of the transmission rods 2 are fixedly connected to worm gears. The bottom of the outer walls of the worm gears is meshed with worm gears 2. The front side of the worm gears 2 is fixedly connected to a transmission rod 3. The rear side of the worm gears 2 is rotatably connected to the front side of the motor.

[0016] As a further description of the above technical solution:

[0017] The hand crank assembly includes a handwheel, the rear side of which is rotatably connected to the front side of the base box, the rear inner wall of which is fixedly connected to the front side of the transmission rod three, and a handle is rotatably connected to the left front end of the handwheel.

[0018] As a further description of the above technical solution:

[0019] The rotating assembly includes multiple inner rings, the inner walls of which are fixedly connected to the outer walls of multiple fixed shafts, and multiple balls are slidably connected to the outer walls of the inner rings. Multiple outer rings are slidably connected to the outer walls of the balls on opposite sides, and the outer walls of the outer rings are fixedly connected to the inner walls of multiple rims.

[0020] As a further description of the above technical solution:

[0021] The anti-slip component includes multiple wheel skins, the inner walls of which are fixedly connected to the outer walls of multiple wheel rims, and multiple anti-slip particles are fixedly connected to the outer walls of each wheel skin.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the hand crank assembly on the front side of the rotating base box drives the adjacent worm gear to rotate via the transfer assembly. The worm gear drives the slider to move, and the slider drives the connecting rod. The connecting rod pushes the wheel frame to rotate around the rotating shaft through the rotating shaft, thus completing the angle adjustment action. This allows the clamping angle of the device to be adjusted manually in a convenient and controllable manner, adapting to various pipe valve sizes. It can also be used in conjunction with the rotating mechanism to change the welding operation angle, improving the convenience of operation. Attached Figure Description

[0024] Figure 1 This is a perspective view of a positioning device for welding production of pipe valves proposed in this utility model;

[0025] Figure 2 This is an exploded view of the adjusting mechanism in a positioning device for welding production of pipe valves proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the trolley component in a positioning device for pipeline valve welding production proposed in this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the transfer component in a positioning device for pipeline valve welding production proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the motor structure in a positioning device for pipeline valve welding production proposed in this utility model.

[0029] Legend:

[0030] 1. Base box; 2. Wheel frame; 3. Adjustment mechanism; 31. Rotating shaft one; 32. Rotating shaft two; 33. Connecting rod; 34. Slider; 35. Carriage assembly; 351. Rotating shaft three; 352. Pulley one; 353. Track; 36. Worm gear one; 37. Dividing motion assembly; 371. Transmission rod one; 372. Bevel gear one; 373. Bevel gear two; 374. Transmission rod two; 375. Worm gear; 376. Worm gear two 377. Transmission rod three; 38. Hand crank assembly; 381. Handwheel; 382. Handle; 39. Motor; 310. Screw two; 4. Rotating mechanism; 41. Screw one; 42. Connecting plate; 43. Fixing pin; 44. Fixing shaft; 45. Rotating assembly; 451. Inner ring; 452. Ball bearing; 453. Outer ring; 46. Wheel rim; 47. Anti-slip assembly; 471. Wheel skin; 472. Anti-slip particles. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1:

[0033] Reference Figures 1-4 A positioning device for pipeline valve welding production includes a base box 1, a wheel frame 2 rotatably connected to the top of the base box 1, an adjustment mechanism 3 is provided inside the base box 1, the adjustment mechanism 3 is used to conveniently and controllably adjust the clamping angle of the device to adapt to various pipeline valve sizes, and a rotating mechanism 4 is provided on the adjacent side of the wheel frame 2, the rotating mechanism 4 is used to rotate the pipeline to change the working angle during welding operations.

[0034] The adjustment mechanism 3 includes multiple rotating shafts 31. The outer walls of the multiple rotating shafts 31 are rotatably connected to the bottom of the front and rear sides of the wheel frame 2, respectively. The outer walls of the multiple rotating shafts 31 are rotatably connected to the top of the same base box 1 on opposite sides. Multiple rotating shafts 32 are rotatably connected to the bottom of the wheel frame 2. Two connecting rods 33 are rotatably connected to the outer walls of the multiple rotating shafts 32. Slider 34 is rotatably connected to the bottom of the multiple connecting rods 33. A trolley assembly 35 is provided at the bottom of the multiple sliders 34. A worm gear 36 is threadedly connected to the adjacent side of the multiple sliders 34. A split assembly 37 is provided between the adjacent worm gears 36. A hand crank assembly 38 is provided on the front side of the base box 1.

[0035] Specifically, when the clamping angle of the device needs to be adjusted to accommodate pipe valves of different sizes, the operator operates the hand crank assembly 38 located on the front side of the base box 1. The hand crank assembly 38 distributes the power to multiple worm gears 36 through the distribution assembly 37. Since the adjacent sides of multiple sliders 34 are threadedly connected to the worm gears 36, the rotation of the worm gears 36 will cause the sliders 34 to move inside the base box 1. After the sliders 34 move, they will exert an oblique force on the connecting rods 33 that are rotatably connected to the sliders 34. Because the tops of multiple connecting rods 33 are rotatably connected to the rotating shafts 32, and the rotating shafts 32 are rotatably connected to the bottom of the wheel frame 2, the movement of the connecting rods 33 will generate a vertical force on the rotating shafts 32, thereby causing the rotating shafts 32 to rotate and move at the bottom of the wheel frame 2. At the same time, the left and right sides of the outer walls of the multiple rotating shafts 31 rotate respectively. Connected to the bottom of the front and rear sides of the wheel frame 2, the outer walls of multiple rotating shafts 31 are also rotatably connected to the top of the same base box 1 on opposite sides. The wheel frame 2 can rotate around the rotating shaft 31 under the combined action of the rotating shaft 31 and the rotating shaft 32, thereby realizing the angle adjustment of the wheel frame 2. Through the coordinated action of the hand crank assembly 38, worm gear 36, split assembly 37, slider 34, connecting rod 33, rotating shaft 32 and rotating shaft 31, the device clamping angle can be conveniently and controllably adjusted to adapt to various pipe valve sizes. When it is necessary to change the pipe working angle during the welding operation, the rotating mechanism 4 set on the adjacent side of the wheel frame 2 will make the pipe rotate freely on the wheel frame 2. Through the operation of the rotating mechanism 4, the effect of rotating the pipe to change the working angle during the welding operation is realized, which makes it convenient for the operator to perform continuous welding operations on the periphery of the pipe valve.

[0036] Example 2:

[0037] Reference Figure 5 The adjustment mechanism 3 also includes multiple screws 310, the bottom of the outer wall of the multiple screws 310 are respectively threaded to the bottom of the inner wall of the same base box 1, and the top of the outer wall of the multiple screws 310 are respectively threaded to the same motor 39.

[0038] Specifically, during the assembly and operation of the adjustment mechanism 3, the bottom of the outer wall of multiple screws 310 is screwed into the bottom of the inner wall of the base box 1, and the top of the outer wall of multiple screws 310 is screwed into the corresponding threaded holes of the motor 39. This achieves a detachable and fixed connection between the motor 39 and the base box 1. Through the support of the base box 1 for the multiple screws 310 and the fixing effect of the multiple screws 310 for the motor 39, the motor 39 will not shift its position during operation. When the adjustment mechanism 3 needs to run automatically, the motor 39 outputs power to the adjustment mechanism 3. At this time, the operator can achieve automatic control of the adjustment mechanism 3 without shaking the hand crank component 38.

[0039] Reference Figures 2-5 The rotating mechanism 4 includes multiple screws 41. The outer walls of the screws 41 are threaded to the left and right sides of the wheel frame 2 on adjacent sides. Connecting discs 42 are threaded to the outer walls of the screws 41 on opposite sides. Fixing pins 43 are fixedly connected to adjacent connecting discs 42. Fixing shafts 44 are slidably connected to the outer walls of the fixing pins 43. Rotating components 45 are provided on the outer walls of the fixing shafts 44. Multiple wheel rims 46 are provided on the outer walls of the rotating components 45. Anti-slip components 47 are provided on the outside of the wheel rims 46. The trolley assembly 35 includes multiple rotating shafts 351. The outer walls of the rotating shafts 351 are rotatably connected to the bottom of multiple sliders 34 on the left and right sides respectively. Pulleys 352 are rotatably connected to the outer walls of the rotating shafts 351 on opposite sides. The inner walls of the base box 1 are fixedly connected to the wheel frame 2 on opposite sides. The assembly 37 is equipped with multiple tracks 353, the tops of which are slidably connected to the outer walls of multiple pulleys 352. The transfer assembly 37 includes two transmission rods 371, the front and rear ends of which are respectively fixedly connected to adjacent sides of multiple worm gears 36. The outer walls of the two transmission rods 371 are fixedly connected to bevel gears 372. The outer walls of the two bevel gears 372 are meshed with bevel gears 373. The two bevel gears 373 are connected with the same transmission rod 374. The outer wall of the transmission rod 374 is fixedly connected to a worm gear 375. The bottom of the outer wall of the worm gear 375 is meshed with a worm gear 376. The front side of the worm gear 376 is fixedly connected to a transmission rod 377. The rear side of the worm gear 376 is rotatably connected to the front side of the motor 39.

[0040] Specifically, power is applied to the transmission rod 377 of the transfer assembly 37, which drives the worm gear 376 to rotate. The worm gear 376 meshes with the worm gear 375, thus transmitting power to the transmission rod 374. The transmission rod 374 rotates synchronously with the worm gear 375, and the bevel gears 373 at both ends of the transmission rod 374 rotate accordingly. The bevel gears 373 mesh with the adjacent bevel gear 372, driving the bevel gear 372 and the transmission rod 371 fixedly connected to it to rotate. Through the meshing connection between the bevel gears 373 and 372, the direction of power is changed and transmitted to the transmission rod 371. In effect, the front and rear ends of the transmission rod 371 are fixedly connected to the adjacent sides of multiple worm gears 36. When the transmission rod 371 rotates, it drives the multiple worm gears 36 to rotate synchronously, completing the power transmission process of the entire distribution assembly 37. This allows the operator to adjust the angles of multiple adjustment mechanisms 3 simultaneously. When the operator needs to automatically adjust the adjustment mechanism 3 via the motor 39, the motor 39 can output power to the worm gear 376, enabling the worm gear 376 to rotate automatically and complete the power transmission. When rotating the pipe, the adjacent sides of the outer walls of the multiple screws 41 of the rotating mechanism 4 are threadedly connected to the left and right sides of the wheel frame 2. Through the wheel frame 2 and the screws 41 The threaded connection of 41 to the fixed connecting plate 42, and the fixing pin 43 of the connecting plate 42 sliding on the outer wall of the fixed shaft 44, realizes the effect of adjusting the position of the fixed shaft 44. The rotating component 45 on the outer wall of the fixed shaft 44 determines the installation position through the setting of the fixed shaft 44, preventing the rotating component 45 from shifting. The rotating component 45 changes the movement of the wheel rim 46 from sliding friction to rolling friction, reducing the wear of the rotating mechanism 4, improving efficiency and service life. The anti-slip component 47 on the outside of the wheel rim 46 interacts with the contact surface, realizing the anti-slip effect on the pipe contact surface during the rotation of the wheel rim 46, ensuring that the rotating mechanism 4 can stably restrict the movement of the pipe when it moves. During the operation of the section mechanism 3, the left and right sides of the outer walls of the multiple rotating shafts 351 of the trolley assembly 35 are rotatably connected to the bottom of multiple sliders 34 respectively. When the sliders 34 are moved by force, they drive the rotating shafts 351 to move synchronously. The sliders 34 drive the rotating shafts 351 to move. The pulleys 352 on the outer walls of the rotating shafts 351 slide on the top of the track 353 on the inner wall of the base box 1, realizing the effect of the trolley assembly 35 moving along the track 353. This changes the sliding friction of the sliders 34 to rolling friction, reducing the wear and movement resistance of the sliders 34. The multiple tracks 353 restrict the sliding trajectory of the pulleys 352, ensuring the stability of the trolley assembly 35 during movement.

[0041] Reference Figures 2-4The hand crank assembly 38 includes a handwheel 381, the rear side of which is rotatably connected to the front side of the base box 1. The rear side of the inner wall of the handwheel 381 is fixedly connected to the front side of the transmission rod 377. A handle 382 is rotatably connected to the left front end of the handwheel 381. The rotating assembly 45 includes multiple inner rings 451, the inner walls of which are fixedly connected to the outer walls of multiple fixed shafts 44. Multiple balls 452 are slidably connected to the outer walls of the multiple inner rings 451. Multiple outer rings 453 are slidably connected to the outer walls of the multiple balls 452 on opposite sides. The outer walls of the multiple outer rings 453 are fixedly connected to the inner walls of multiple wheel rims 46. The anti-slip assembly 47 includes multiple wheel skins 471, the inner walls of which are fixedly connected to the outer walls of multiple wheel rims 46. Multiple anti-slip particles 472 are fixedly connected to the outer walls of the multiple wheel skins 471.

[0042] Specifically, the operator operates on the handle 382. Since the handle 382 is rotatably connected to the left front end of the handwheel 381, rotating the handle 382 drives the handwheel 381 to rotate. Because the rear inner wall of the handwheel 381 is fixedly connected to the front side of the transmission rod 377, the rotation of the handwheel 381 synchronously drives the transmission rod 377 to rotate. Through the linkage between rotating the handle 382 and the handwheel 381, the synchronous rotation of the transmission rod 377 is achieved. After the transmission rod 377 rotates, it will... Power is transmitted to the fixed shaft 44. Since the inner walls of the multiple inner rings 451 in the rotating assembly 45 are respectively fixedly connected to the outer walls of the multiple fixed shafts 44, the rotation of the fixed shafts 44 will drive the inner rings 451 to rotate together. The outer walls of the multiple inner rings 451 are respectively slidably connected to multiple balls 452. When the inner rings 451 rotate, they will push the balls 452 to roll between their own outer walls and the inner walls of the outer rings 453. The outer walls of the multiple balls 452 are respectively slidably connected to multiple outer rings 453 on opposite sides. The rolling of the ball 452 will drive the outer ring 453 to rotate synchronously, changing the motion friction between the inner ring 451 and the outer ring 453 from sliding friction to rolling friction, reducing the motion resistance of the rotating component 45, thereby reducing the motion wear of the rotating mechanism 4. After the wheel rim 46 rotates, it will drive the anti-slip component 47 to run. Since the inner walls of multiple wheel skins 471 in the anti-slip component 47 are respectively fixedly connected to the outer walls of multiple wheel rims 46, the rotation of the wheel rim 46 will drive the wheel skins 471 to rotate together. Multiple anti-slip particles 472 are fixedly connected to the outer walls of multiple wheel skins 471. When the wheel skins 471 rotate, the anti-slip particles 472 are in close contact with the contact surface of the pipe, increasing the friction between the wheel skins 471 and the pipe contact surface, avoiding the relative displacement of the pipe position caused by the operator rotating the pipe during pipe welding operations. Through the rotation of the wheel skins 471 driven by the wheel rim 46 and the contact between the anti-slip particles 472 and the contact surface, the effect of increasing the friction between the wheel skins 471 and the contact surface is achieved.

[0043] Working principle: When it is necessary to adjust the clamping angle of the device to accommodate pipe valves of different sizes, the operator first acts on the hand crank assembly 38 set on the front side of the base box 1. By rotating the handle 382 in the hand crank assembly 38, the rotation of the handle 382 will drive the handwheel 381 to rotate. Since the rear side of the inner wall of the handwheel 381 is fixedly connected to the front side of the transmission rod 377 in the distribution assembly 37, the rotation of the handwheel 381 will synchronously drive the transmission rod 377 to rotate, thereby enabling the hand crank assembly 38 to realize the distributed transmission of power through the distribution assembly 37.

[0044] In the power transmission process, the transfer assembly 37 first drives the connected worm gear 376 to rotate via the transmission rod 377. Since the worm gear 376 meshes with the worm gear 375, the rotation of the worm gear 376 will transmit power to the transmission rod 374, which is fixedly connected to the worm gear 375, through meshing transmission. This causes the transmission rod 374 to rotate synchronously with the worm gear 375. The bevel gears 373 at both ends of the transmission rod 374 will rotate together with the transmission rod 374. The bevel gears 373 mesh with the adjacent bevel gear 372. This meshing connection not only realizes the conversion of the power transmission direction, but also drives the bevel gear 372 and the transmission rod 371, which is fixedly connected to the bevel gear 372, to rotate. The front and rear ends of the transmission rod 371 are fixedly connected to the adjacent sides of multiple worm gears 36, respectively. Therefore, the rotation of the transmission rod 371 will drive multiple worm gears 36 to rotate synchronously, thereby completing the power distribution transmission of the transfer assembly 37 to multiple worm gears 36.

[0045] Since the adjacent sides of multiple sliders 34 are threadedly connected to the worm gear 36, the synchronous rotation of the worm gear 36 will drive the sliders 34 to move along the axis of the worm gear 36 inside the base box 1. During this process, the trolley assembly 35, which is rotatably connected to the bottom of the sliders 34, will assist the sliders 34 to move stably. The outer walls of multiple rotating shafts 351 in the trolley assembly 35 are rotatably connected to the bottom of multiple sliders 34 on the left and right sides respectively. When the sliders 34 are moved by force, they will drive the rotating shafts 351 to move synchronously. The pulley 352 set on the outer wall of the rotating shaft 351 will slide on the top of the track 353 on the inner wall of the base box 1. This structure not only realizes the stable movement of the trolley assembly 35 along the track 353, but also transforms the sliding friction of the sliders 34 during the movement into rolling friction, effectively reducing the wear and movement resistance of the sliders 34. At the same time, the multiple tracks 353 restrict the sliding trajectory of the pulley 352, further ensuring the stability of the movement of the trolley assembly 35.

[0046] After the slider 34 moves stably, it will exert an oblique force on the connecting rod 33 that is rotatably connected to the slider 34. Since the tops of multiple connecting rods 33 are rotatably connected to the second rotating shaft 32, and the second rotating shaft 32 is rotatably connected to the bottom of the wheel frame 2, the motion generated by the connecting rod 33 under the oblique force will be converted into a vertical force on the second rotating shaft 32, thereby driving the second rotating shaft 32 to rotate and move at the bottom of the wheel frame 2. At the same time, the outer walls of multiple first rotating shafts 31 are rotatably connected to the left and right sides of the bottom of the front and rear sides of the wheel frame 2, and multiple first rotating shafts 31 are rotatably connected to the bottom of the wheel frame 2. The outer wall of 1 is also rotatably connected to the top of the same base box 1 on a side away from each other, so that the wheel frame 2 can rotate around the rotating shaft 31 under the combined action of the rotational support of the rotating shaft 31 and the pushing action of the rotating shaft 32, and finally achieve precise adjustment of the clamping angle of the wheel frame 2. Through the cooperation of the hand crank assembly 38, the split assembly 37, the worm gear 36, the slider 34, the trolley assembly 35, the connecting rod 33, the rotating shaft 32 and the rotating shaft 31, the device clamping angle can be conveniently and controllably adjusted to adapt to various pipe valve sizes.

[0047] When the pipe's operating angle needs to be changed during the welding operation, the rotating mechanism 4 located on the adjacent side of the wheel frame 2 allows the pipe to rotate freely on the wheel frame 2. The outer walls of multiple screws 41 are threadedly connected to the left and right sides of the wheel frame 2 on adjacent sides. The threaded connection between the wheel frame 2 and the screws 41 secures the connecting plate 42. The fixing pin 43 on the connecting plate 42 can slide on the outer wall of the fixing shaft 44. The sliding of the fixing pin 43 allows for flexible adjustment of the position of the fixing shaft 44 to meet the pipe's support requirements. A rotating assembly 45 is located on the outer wall of the fixing shaft 44. The rotating assembly 45 determines its installation position through the setting of the fixed shaft 44, effectively preventing the rotating assembly 45 from shifting during operation. The inner walls of multiple inner rings 451 in the rotating assembly 45 are respectively fixedly connected to the outer walls of multiple fixed shafts 44. When the fixed shaft 44 rotates under the action of power, it will drive the inner rings 451 to rotate together. Multiple balls 452 are slidably connected to the outer walls of the multiple inner rings 451. When the inner rings 451 rotate, they will push the balls 452 to roll between their own outer walls and the inner walls of the outer rings 453. The outer walls of the multiple balls 452 are on opposite sides. The rotating assembly 45 has multiple outer rings 453 connected by a sliding connection. The rolling of the ball bearing 452 causes the outer rings 453 to rotate synchronously. This structure changes the motion friction between the inner ring 451 and the outer ring 453 from sliding friction to rolling friction, effectively reducing the motion resistance of the rotating assembly 45 and thus reducing the motion wear of the rotating mechanism 4. The outer rings 453 are connected to the rims 46, and the rotation of the outer rings 453 causes the rims 46 to rotate synchronously. The outer side of the rims 46 is provided with anti-slip components 47. The inner walls of multiple wheel skins 471 in the anti-slip components 47 are respectively fixedly connected to the outer walls of multiple rims 46. The rotation of ring 46 will cause the wheel skin 471 to rotate together. Multiple anti-slip particles 472 are fixedly connected to the outer wall of multiple wheel skins 471. When the wheel skin 471 rotates, the anti-slip particles 472 will make close contact with the contact surface of the pipe outer wall, significantly increasing the friction between the wheel skin 471 and the pipe contact surface. This avoids the relative displacement of the pipe position caused by the operator rotating the pipe during the pipe welding operation. Through the above operation of the rotating mechanism 4, the pipe can be rotated to change the working angle during the welding operation, which makes it easier for the operator to perform continuous welding operations on the outside of the pipe valve.

[0048] In addition, the motor 39 is stably connected to the base box 1 by multiple screws 310, ensuring that the motor 39 will not shift position during operation. When the operator needs to operate the adjustment mechanism 3 for automatic operation to reduce manual operation steps, the motor 39 can directly output rotational power to the adjustment mechanism 3 and output the power to the worm gear 376 in the transfer assembly 37, so that the worm gear 376 can rotate automatically and complete the power transmission according to the power transmission path of the transfer assembly 37. At this time, the operator can achieve automatic control of the adjustment mechanism 3 without shaking the hand crank assembly 38, further improving the ease of operation of the device.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning device for pipeline valve welding production, comprising a base box (1), characterized in that: The top of the base box (1) is rotatably connected to a wheel frame (2). An adjustment mechanism (3) is provided inside the base box (1). The adjustment mechanism (3) is used to conveniently and controllably adjust the clamping angle of the device to adapt to various pipe valve sizes. A rotating mechanism (4) is provided on the adjacent side of the wheel frame (2). The rotating mechanism (4) is used to rotate the pipe to change the working angle during welding operations. The adjustment mechanism (3) includes multiple rotating shafts (31). The outer walls of the multiple rotating shafts (31) are rotatably connected to the bottom of the front and rear sides of the wheel frame (2) respectively. The outer walls of the multiple rotating shafts (31) are rotatably connected to the top of the same base box (1) on opposite sides. The bottom of the wheel frame (2) is rotatably connected to multiple rotating shafts (32). The outer walls of the multiple rotating shafts (32) are rotatably connected to two connecting rods (33). The bottom of the multiple connecting rods (33) is rotatably connected to sliders (34). The bottom of the multiple sliders (34) is provided with a trolley assembly (35). The adjacent sides of the multiple sliders (34) are threaded with worm gears (36). The adjacent worm gears (36) are provided with a transfer assembly (37). The front side of the base box (1) is provided with a hand crank assembly (38).

2. The positioning device for pipeline valve welding production according to claim 1, characterized in that: The adjustment mechanism (3) also includes a plurality of screws (310), the bottom of the outer wall of the plurality of screws (310) is threaded to the bottom of the inner wall of the same base box (1), and the top of the outer wall of the plurality of screws (310) is threaded to the same motor (39).

3. The positioning device for pipeline valve welding production according to claim 1, characterized in that: The rotating mechanism (4) includes a plurality of screws (41), the outer walls of the plurality of screws (41) are threaded to the left and right sides of the wheel frame (2) on adjacent sides, the outer walls of the plurality of screws (41) are threaded to the opposite sides of the outer walls of the plurality of screws (41), the adjacent connecting discs (42) are fixedly connected to each other by a fixing pin (43), the outer walls of the plurality of fixing pins (43) are slidably connected to a fixing shaft (44), the outer walls of the plurality of fixing shafts (44) are provided with a rotating assembly (45), the outer walls of the rotating assembly (45) are provided with a plurality of wheel rims (46), and the outer sides of the plurality of wheel rims (46) are provided with an anti-slip assembly (47).

4. A positioning device for pipeline valve welding production according to claim 1, characterized in that: The trolley assembly (35) includes multiple rotating shafts (351), the outer walls of the multiple rotating shafts (351) are rotatably connected to the bottom of multiple sliders (34) on the left and right sides respectively, and the outer walls of the multiple rotating shafts (351) are rotatably connected to pulleys (352). The inner walls of the base box (1) are fixedly connected to multiple tracks (353) on the side away from each other, and the tops of the multiple tracks (353) are slidably connected to the outer walls of the multiple pulleys (352).

5. A positioning device for pipeline valve welding production according to claim 1, characterized in that: The transfer assembly (37) includes two transmission rods (371). The front and rear ends of the two transmission rods (371) are fixedly connected to the adjacent sides of a plurality of worm gears (36). The outer walls of the two transmission rods (371) are fixedly connected to bevel gears (372). The outer walls of the two bevel gears (372) are meshed with each other. The two bevel gears (373) are connected with the same transmission rod (374). The outer wall of the transmission rod (374) is fixedly connected to a worm gear (375). The bottom of the outer wall of the worm gear (375) is meshed with a worm gear (376). The front side of the worm gear (376) is fixedly connected to a transmission rod (377). The rear side of the worm gear (376) is rotatably connected to the front side of the motor (39).

6. A positioning device for pipeline valve welding production according to claim 1, characterized in that: The hand crank assembly (38) includes a handwheel (381), the rear side of which is rotatably connected to the front side of the base box (1), the rear side of the inner wall of the handwheel (381) is fixedly connected to the front side of the transmission rod three (377), and a handle (382) is rotatably connected to the left front end of the handwheel (381).

7. A positioning device for pipeline valve welding production according to claim 3, characterized in that: The rotating assembly (45) includes multiple inner rings (451), the inner walls of the multiple inner rings (451) are respectively fixedly connected to the outer walls of multiple fixed shafts (44), the outer walls of the multiple inner rings (451) are slidably connected to multiple balls (452), the outer walls of the multiple balls (452) are respectively slidably connected to multiple outer rings (453) on opposite sides, and the outer walls of the multiple outer rings (453) are respectively fixedly connected to the inner walls of multiple rims (46).

8. A positioning device for pipeline valve welding production according to claim 3, characterized in that: The anti-slip component (47) includes multiple wheel skins (471), the inner walls of the multiple wheel skins (471) are respectively fixedly connected to the outer walls of multiple wheel rims (46), and multiple anti-slip particles (472) are fixedly connected to the outer walls of the multiple wheel skins (471).

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