Supporting device for HDPE pipeline welding

Abstract

The invention relates to the field of pipeline welding, in particular to a supporting device for HDPE pipeline welding. Due to the characteristics of flexibility of an HDPE material and longer pipeline, the middle part of the HDPE pipeline is easy to bend under the action of gravity, so that not only is the overall levelness influenced, but also errors are generated in the welding process, the welding effect is not ideal, and the welding quality cannot be guaranteed. Comprising a shell, an upper side protection shell is arranged above the shell, three evenly-distributed through holes are formed in the side face of the upper side protection shell, a translation transmission mechanism is arranged in the upper side protection shell, the translation transmission mechanism comprises a driving sliding shaft, and the driving sliding shaft is slidably connected into the through hole in the middle of the upper side protection shell; the middle of the driving sliding shaft is slidably connected with a bidirectional driving shaft. The two sides of the HDPE pipeline are supported, so that it is guaranteed that the non-welding end and the middle of the HDPE pipeline are in the horizontal state in the welding process, the HDPE pipeline is more stable during welding, and the welding quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of pipeline welding, and in particular to a supporting device for HDPE pipeline welding. Background Art

[0002] Due to its excellent performance characteristics, HDPE pipes occupy an important position in urban water supply, drainage, and gas pipeline projects, providing important support for urban infrastructure construction. At the same time, in farmland irrigation systems, HDPE pipes can transport water in a long-term and stable manner due to their good weather resistance and anti-aging ability, thus improving the efficiency of farmland irrigation. HDPE pipe welding technology is relatively mature, and there are various welding methods, including hot-melt butt welding, electric fusion connection, etc. These methods can achieve efficient and reliable connection of pipelines.

[0003] In the welding process of HDPE pipes, in order to ensure the welding quality and efficiency, the pipes must be placed horizontally. However, due to the flexibility of HDPE materials and the long pipe length, the middle part of the HDPE pipe is prone to bending under the action of gravity, which not only affects the overall horizontality, but also causes errors during the welding process, resulting in unsatisfactory welding results and the welding quality cannot be guaranteed. Summary of the invention

[0004] (1) Technical issues to be resolved In order to overcome the flexibility of HDPE materials and the long pipe characteristics, the HDPE pipe is prone to bending in the middle part under the action of gravity. The technical problem to be solved by the present invention is that errors are generated during the welding process of the HDPE pipe, resulting in unsatisfactory welding effects and the welding quality cannot be guaranteed.

[0005] (2) Technical solution In order to solve the above technical problems, the present invention provides a support device for HDPE pipe welding, comprising a shell, an upper protective shell is arranged above the shell, three evenly distributed through holes are opened on the side of the upper protective shell, a translation transmission mechanism is arranged inside the upper protective shell, the translation transmission mechanism comprises an active sliding shaft, the active sliding shaft is slidably connected in the middle through hole of the upper protective shell, the middle of the active sliding shaft is slidably connected with a bidirectional active shaft, the active sliding shaft is slidably connected with a bidirectional hand wheel at one end outside the upper protective shell, a baffle rotating shaft is fixedly connected to the surface of the bidirectional hand wheel, the baffle rotating shaft is rotatably connected with the active shaft baffle, the active sliding shaft is located in the outer side of the upper protective shell and is slidably connected with a bidirectional active gear, the end of the active sliding shaft is fixedly connected with a conical pushing block, the outer side of the conical pushing block is symmetrically slidably connected with a driven sliding shaft, the two sides of the bidirectional active gear are symmetrically meshed with bidirectional driven gears, the driven sliding shaft is slidably connected to the middle of the bidirectional driven gear, and one end of the driven sliding shaft is fixedly connected with a trigger rod.

[0006] Preferably, threaded rods are symmetrically and rotatably connected on both sides of the upper protective shell, a sliding groove is provided in the middle of the end surface of the threaded rod, and a trigger sliding shaft is slidably connected inside the sliding groove, one end of the trigger sliding shaft is fixedly connected to a trigger plate, one end of the threaded rod is fixedly connected to the outer side surface of the limit shell, and a trigger return spring is sleeved on the outer side of the trigger sliding shaft between the limit shell and the trigger plate, one end of the limit shell is fixedly connected to a side driven gear, one side surface of the side driven gear is symmetrically and rotatably connected to a second rotating link through a bracket, one end of the second rotating link is rotatably connected to a clamping sleeve through the bracket, the middle part of the second rotating link is rotatably connected to the first rotating link through the bracket, the first rotating link is symmetrically and rotatably connected to the outer side surface of the trigger plate through the bracket, and one end surface of the trigger plate is against one end of the trigger rod.

[0007] Preferably, the through holes on both sides of the three through holes of the upper protective shell are rotatably connected to a side driving shaft, one end of the side driving shaft located on the outside of the upper protective shell is fixedly connected to a one-way handwheel, and one end of the side driving shaft located inside the upper protective shell is fixedly connected to a side driving gear, and the side driving gear is meshed with the side driven gear.

[0008] Preferably, the upper end surface of the upper protective shell is provided with a supporting mechanism, and the supporting mechanism includes a main arc-shaped supporting plate, and the main arc-shaped supporting plate is fixedly connected to the upper end surface of the upper protective shell, and arc-shaped plate supporting grooves are symmetrically fixedly connected on both sides of the upper protective shell and below the threaded rod, and an arc-shaped plate supporting slider is slidably connected in the arc-shaped plate supporting groove, and the interior of the arc-shaped plate supporting slider is threadedly connected to the threaded rod, and the upper end surface of the arc-shaped plate supporting slider is fixedly connected to a side arc-shaped support plate.

[0009] Preferably, the lower end surface of the main arc-shaped support plate is fixedly connected to a driving shaft support sleeve via a fixing rod, the driving shaft support sleeve is rotatably connected to the outer side surfaces of the bidirectional driving shaft and the side driving shaft, the lower end surface of the main arc-shaped support plate is fixedly connected to a driving gear baffle via a fixing rod, and the driving gear baffle is against the side surface of the bidirectional driving gear.

[0010] Preferably, the driven sliding shaft is square near the conical pushing block and cylindrical away from the conical pushing block. The cylindrical outer side surface of the driven sliding shaft is rotatably connected to a driven shaft support sleeve, and the driven shaft support sleeve is fixedly connected to the lower end surface of the main arc support plate through a fixing rod.

[0011] Preferably, the active sliding shaft is located inside the upper protective shell and fixedly connected to a limit baffle, and a main shaft reset spring is sleeved on the outside of the bidirectional active shaft and located between the limit baffle and the active shaft support sleeve.

[0012] Preferably, a lifting mechanism is provided inside the shell, and the lifting mechanism includes a driving worm, a through hole is provided on the side of the shell, the driving worm is rotatably connected to the inside of the through hole, one end of the driving worm located outside the shell is fixedly connected to a rotating handle, the driving worm located outside the shell is rotatably connected to a lifting support sleeve, the lifting support sleeve is fixedly connected to the inner side of the shell, the driving worm is meshedly connected to a driven worm wheel inside the shell, one side of the driven worm wheel is fixedly connected to a fixed rotating shaft, the fixed The side of the rotating shaft is rotatably connected to a gear support sleeve, and the gear support sleeve is fixedly connected to the inner side of the outer shell through a fixing rod, and the other end of the fixed rotating shaft is fixedly connected to an active lifting gear, and the bottom surface inside the outer shell is fixedly connected to a vertical sliding sleeve, and the interior of the vertical sliding sleeve is slidably connected to a lifting shaft, and one side of the lifting shaft is provided with teeth, and the lifting shaft is meshed with the active lifting gear through the teeth, and the outer side surface of the vertical sliding sleeve is symmetrically fixedly connected to a lifting bracket, and the lifting bracket is fixedly connected to the inner bottom surface of the outer shell.

[0013] Preferably, the upper end surface of the lifting shaft is fixedly connected to a supporting base plate, the interior of the supporting base plate is rotatably connected to a supporting shaft, and the upper end surface of the supporting shaft is fixedly connected to the bottom of the upper protective shell.

[0014] Preferably, universal wheels are provided at the bottom of the shell, the universal wheels are evenly distributed at the bottom of the shell, and the universal wheels are fixedly connected to the bottom of the shell.

[0015] (3) Beneficial effects 1. Turn the bidirectional handwheel clockwise, the active sliding shaft will drive the bidirectional active gear to rotate clockwise, and under the meshing of the gears, the bidirectional driven gear will rotate counterclockwise, thereby driving the driven sliding shaft to rotate counterclockwise. Under the action of the clamping sleeve, the side driven gear will rotate counterclockwise, thereby driving the threaded rod to rotate counterclockwise. At this time, the arc plate support slider will move along the slide groove to the end away from the upper protective shell, driving the side arc support plate to move, and realize support on both sides of the HDPE pipe, thereby ensuring that the non-welding end and the middle of the HDPE pipe are in a horizontal state during welding, making the HDPE pipe more stable during welding and ensuring the quality of welding; 2. Turn the one-way hand wheel clockwise to drive the side driving gear to rotate clockwise through the side driving shaft, and drive the side driven gear to rotate counterclockwise through gear meshing, so that the unilateral side arc-shaped support plate can be moved, making the entire device more suitable for complex working environments and better adapting to support under different conditions; 3. Rotate the handle counterclockwise, which will drive the active worm to rotate counterclockwise, drive the driven worm gear to rotate clockwise, and drive the active lifting gear to rotate clockwise through the fixed rotating shaft, thereby driving the lifting shaft to move upward, realizing the lifting of the entire support mechanism. It can effectively adjust the horizontal parallelism between the support device and the welding device, thereby ensuring that the HDPE pipe is at the same height as a whole during welding, which is convenient for better positioning of the two HDPE pipes during welding; 4. When moving to the required position, the angle of the support mechanism and the HDPE pipe may not match. At this time, a push can be applied to the upper protective shell. Through the rotation of the support base plate and the support shaft, the upper protective shell can be rotated to make the entire support device parallel to the HDPE pipe, so as to better support the HDPE pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the support mechanism of the present invention; Figure 3 It is a schematic diagram of the structure of the upper protective shell of the present invention; Figure 4 It is a schematic structural diagram of the translation transmission mechanism of the present invention; Figure 5 It is a schematic diagram of the bidirectional driving shaft structure of the present invention; Figure 6 It is a schematic diagram of the structure of the driven sliding shaft of the present invention; Figure 7 is a cross-sectional view of the clamping mechanism of the present invention; Figure 8 It is a schematic diagram of the bidirectional hand wheel structure of the present invention; Fig. 9 It is a schematic diagram of the lifting mechanism structure of the present invention; Fig.10 It is a cross-sectional view of the lifting axis of the present invention.

[0017] The marks in the attached drawings are: 1-support mechanism, 101-main arc support plate, 102-side arc support plate, 103-arc plate support slide, 104-arc plate support slider, 105-driving shaft support sleeve, 106-driven shaft support sleeve, 107-driving gear baffle, 201-housing, 202-upper side protective shell, 203-support bottom plate, 204-support shaft, 205-vertical sliding sleeve, 206-lifting support sleeve, 207-lifting bracket, 208-gear support sleeve, 3-universal wheel, 4-translational transmission mechanism, 401-bidirectional hand wheel, 402-unidirectional hand wheel, 403-baffle rotating shaft, 404-driving sliding shaft, 405-limiting baffle, 406-main shaft reciprocating Position spring, 407-side driving shaft, 408-driving shaft baffle, 409-bidirectional driving shaft, 410-threaded rod, 411-limiting shell, 412-side driven gear, 413-side driving gear, 414-conical pushing block, 415-bidirectional driving gear, 416-bidirectional driven gear, 417-driven sliding shaft, 418-trigger rod, 419-trigger plate, 420-trigger return spring, 421-trigger sliding shaft, 422-first rotating connecting rod, 423-second rotating connecting rod, 424-clamping sleeve, 5-lifting mechanism, 501-rotating handle, 502-driving worm, 503-driven worm wheel, 504-driving lifting gear, 505-lifting shaft, 506-fixed rotating shaft. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Example 1

[0019] A support device for HDPE pipe welding, such as Figure 1-Figure 10As shown, it includes a shell 201, a shell 201, an upper protective shell 202 is arranged above the shell 201, three evenly distributed through holes are opened on the side of the upper protective shell 202, and a translation transmission mechanism 4 is arranged inside the upper protective shell 202. The translation transmission mechanism 4 includes an active sliding shaft 404, and the active sliding shaft 404 is slidably connected in the middle through hole of the upper protective shell 202. The middle of the active sliding shaft 404 is slidably connected with a two-way active shaft 409, and the active sliding shaft 404 is slidably connected with a two-way hand wheel 401 at one end outside the upper protective shell 202. The surface of the two-way hand wheel 401 is fixedly connected with a baffle rotating shaft 403, and the baffle rotating shaft 403 is rotatably connected with an active shaft baffle 408, and the active sliding shaft 404 A bidirectional driving gear 415 is slidably connected to the outer side of the upper protective shell 202, and a conical pushing block 414 is fixedly connected to the end of the driving sliding shaft 404. A driven sliding shaft 417 is symmetrically slidably connected to the outer side of the conical pushing block 414. The end surface of the driven sliding shaft 417 connected to the conical pushing block 414 is relatively smooth, which facilitates the driven sliding shaft 417 to slide on the surface of the conical pushing block 414. Bidirectional driven gears 416 are symmetrically meshed on both sides of the bidirectional driving gear 415. The driven sliding shaft 417 is slidably connected to the middle part of the bidirectional driven gear 416, and this end of the driven sliding shaft 417 can rotate driven by the bidirectional driven gear 416, and one end of the driven sliding shaft 417 is fixedly connected to a trigger rod 418. The active sliding shaft 404 is located inside the upper protective shell 202 and is fixedly connected to a limiting baffle 405. A spindle reset spring 406 is provided outside the bidirectional active shaft 409 and between the limiting baffle 405 and the active shaft support sleeve 105. The spindle reset spring 406 can support the active sliding shaft 404 to reset after use.

[0020] The upper protective shell 202 is symmetrically rotatably connected with a threaded rod 410 on both sides, a slide groove is provided in the middle of the end surface of the threaded rod 410, a trigger sliding shaft 421 is slidably connected inside the slide groove, one end of the trigger sliding shaft 421 is fixedly connected to a trigger plate 419, one end of the threaded rod 410 is fixedly connected to a limit housing 411 on the outer side of the trigger sliding shaft 421, a trigger reset spring 420 is sleeved between the limit housing 411 and the trigger plate 419, one end of the limit housing 411 is fixedly connected to a side driven gear 412, and the side driven gear A side surface of the wheel 412 is symmetrically rotatably connected to a second rotating link 423 through a bracket, and one end of the second rotating link 423 is rotatably connected to a clamping sleeve 424 through a bracket. A groove is provided on the inner side surface of the clamping sleeve 424 to increase the friction force and better clamp the trigger rod 418. The middle part of the second rotating link 423 is rotatably connected to the first rotating link 422 through a bracket. The first rotating link 422 is symmetrically rotatably connected to the outer side surface of the trigger plate 419 through the bracket, and one end surface of the trigger plate 419 is abutted against one end of the trigger rod 418.

[0021] The through holes on both sides of the three through holes of the upper protective shell 202 are rotatably connected to the side driving shaft 407, one end of the side driving shaft 407 located on the outside of the upper protective shell 202 is fixedly connected to the one-way handwheel 402, and one end of the side driving shaft 407 located inside the upper protective shell 202 is fixedly connected to the side driving gear 413, and the side driving gear 413 is meshed with the side driven gear 412.

[0022] A supporting mechanism 1 is provided on the upper end surface of the upper protective shell 202, and the supporting mechanism 1 includes a main arc-shaped supporting plate 101, which is fixedly connected to the upper end surface of the upper protective shell 202, and arc-shaped plate supporting grooves 103 are symmetrically fixedly connected on both sides of the upper protective shell 202 and below the threaded rod 410, and an arc-shaped plate supporting slider 104 is slidably connected in the arc-shaped plate supporting groove 103, the interior of the arc-shaped plate supporting slider 104 is threadedly connected to the threaded rod 410, and the upper end surface of the arc-shaped plate supporting slider 104 is fixedly connected to the side arc-shaped support plate 102.

[0023] The lower end surface of the main arc-shaped support plate 101 is fixedly connected to the driving shaft support sleeve 105 through a fixing rod. The driving shaft support sleeve 105 is rotatably connected to the outer side surfaces of the bidirectional driving shaft 409 and the side driving shaft 407. The lower end surface of the main arc-shaped support plate 101 is fixedly connected to the driving gear baffle 107 through a fixing rod. The driving gear baffle 107 is against the side surface of the bidirectional driving gear 415.

[0024] The driven sliding shaft 417 is square in shape near the conical pushing block 414 and cylindrical in shape away from the conical pushing block 414. The cylindrical outer surface of the driven sliding shaft 417 is rotatably connected to a driven shaft support sleeve 106 to support the rotation of the driven sliding shaft 417. The driven shaft support sleeve 106 is fixedly connected to the lower end surface of the main arc support plate 101 through a fixing rod.

[0025] The housing 201 is provided with a lifting mechanism 5, which includes a driving worm 502. A through hole is provided on the side of the housing 201. The driving worm 502 is rotatably connected to the inside of the through hole. One end of the driving worm 502 located outside the housing 201 is fixedly connected to a rotating handle 501. The driving worm 502 is located outside the housing 201 and is rotatably connected to a lifting support sleeve 206. The lifting support sleeve 206 is fixedly connected to the inner side of the housing 201. The driving worm 502 is located inside the housing 201 and is meshedly connected to a driven worm wheel 503. One side of the driven worm wheel 503 is fixedly connected to a fixed rotating shaft 506. The fixed rotating shaft 506 is fixedly connected to the fixed rotating shaft 506. 06 is rotatably connected to the side thereof with a gear support sleeve 208, and the gear support sleeve 208 is fixedly connected to the inner side of the outer shell 201 through a fixing rod, and the other end of the fixed rotating shaft 506 is fixedly connected to the active lifting gear 504, and the bottom surface inside the outer shell 201 is fixedly connected to a vertical sliding sleeve 205, and the inner sliding connection of the vertical sliding sleeve 205 is connected to a lifting shaft 505, and one side surface of the lifting shaft 505 is provided with teeth, and the lifting shaft 505 is meshed with the active lifting gear 504 through the teeth, and the outer side surface of the vertical sliding sleeve 205 is symmetrically fixedly connected to a lifting bracket 207, and the lifting bracket 207 is fixedly connected to the inner bottom surface of the outer shell 201.

[0026] The upper end surface of the lifting shaft 505 is fixedly connected to the supporting base plate 203 , and the inner part of the supporting base plate 203 is rotatably connected to the supporting shaft 204 . The upper end surface of the supporting shaft 204 is fixedly connected to the bottom of the upper protective shell 202 .

[0027] Universal wheels 3 are arranged at the bottom of the housing 201 . The universal wheels 3 are evenly distributed at the bottom of the housing 201 , and the universal wheels 3 are fixedly connected to the bottom of the housing 201 . Example 2

[0028] Working principle: When the device is required to work, place the HDPE pipe on top of the support mechanism 1. Since the HDPE pipe is a soft pipe, it may bend during welding and cannot be kept level during welding. The two-way handwheel 401 or the one-way handwheel 402 on the adjusting device is used for horizontal support. When the device is in the middle of the HDPE pipe and needs to support both sides at the same time, the active sliding shaft 404 is first pushed toward the inside of the upper protective shell 202, and the limit baffle 405 squeezes the main shaft reset spring 406, and the active shaft baffle 408 is rotated along the baffle rotating shaft 403 to limit the reset of the active sliding shaft 404, so that the active sliding shaft 404 remains in the working state.

[0029] At this time, the active sliding shaft 404 will drive the conical push block 414 to move inward, squeezing the driven sliding shafts 417 on both sides of the conical push block 414. The driven sliding shafts 417 will move to both sides and push the trigger rod 418 to move toward the trigger plate 419. The trigger plate 419 drives the trigger sliding shaft 421 to move toward the inside of the threaded rod 410. At this time, the trigger plate 419 will drive the first rotating connecting rods 422 on both sides to move toward one end. Under the action of the first rotating connecting rod 422, the second rotating connecting rod 423 is driven to perform a circular motion along the bracket on the side driven gear 412, thereby driving the clamping sleeve 424 to clamp the trigger rod 418. The clamping sleeve 424 has a groove that meshes with the protrusion on the trigger rod 418, which can increase the friction force and achieve the clamping of the trigger rod 418.

[0030] At this time, the two-way handwheel 401 is rotated clockwise, and the active sliding shaft 404 will drive the two-way active gear 415 to rotate clockwise. Under the meshing of the gears, the two-way driven gear 416 will rotate counterclockwise, thereby driving the driven sliding shaft 417 to rotate counterclockwise. Under the action of the clamping sleeve 424, the side driven gear 412 will be driven to rotate counterclockwise, thereby driving the threaded rod 410 to rotate counterclockwise. At this time, the arc plate support slider 104 will move along the slide groove toward the end away from the upper protective shell 202, driving the side arc support plate 102 to move, and realize support on both sides of the HDPE pipe. When the side arc support plate 102 needs to be retracted, it is only necessary to rotate the two-way handwheel 401 in the opposite direction. At this time, the active sliding shaft 404 will drive the above-mentioned mechanism to move in the opposite direction to realize the retraction of the side arc support plate 102.

[0031] At this time, the active shaft baffle 408 is rotated in the opposite direction to remove the restriction on the active sliding shaft 404. At this time, the main shaft reset spring 406 will have a reset force on the active sliding shaft 404 to achieve the reset of the active sliding shaft 404. At the same time, the trigger plate 419 will squeeze the trigger reset spring 420 during operation. When the active sliding shaft 404 is reset, the trigger reset spring 420 will have an elastic force on the trigger plate 419 to achieve the reset of the trigger plate 419. Driven by the first rotating link 422 and the second rotating link 423, the clamping sleeve 424 will release the trigger rod 418. At the same time, the trigger plate 419 will drive the trigger rod 418 and the driven sliding shaft 417 to move toward the conical push block 414 to achieve the reset of the entire device.

[0032] When the device is close to one end of the HDPE pipe or other situations where one side needs to be supported, it is only necessary to rotate the one-way hand wheel 402 clockwise, drive the side driving gear 413 to rotate clockwise through the side driving shaft 407, and drive the side driven gear 412 to rotate counterclockwise through gear meshing, so that the single-sided side arc support plate 102 can be moved. When retracting, rotate the one-way hand wheel 402 counterclockwise to retract the single-sided side arc support plate 102.

[0033] In addition, when adjusting the support height of the device according to actual usage, the handle 501 can be rotated counterclockwise, which will drive the active worm 502 to rotate counterclockwise, and drive the driven worm gear 503 to rotate clockwise. The active lifting gear 504 is driven to rotate clockwise through the fixed rotating shaft 506, thereby driving the lifting shaft 505 to move upward, thereby lifting the entire support mechanism 1. When the height needs to be lowered, the handle 501 can be rotated in the opposite direction to lower the entire support mechanism 1.

[0034] There is a universal wheel 3 at the bottom of the entire device. When the device needs to be moved, it can be pushed directly. When it is moved to the required position, the support mechanism 1 may not match the angle of the HDPE pipe. At this time, a push can be applied to the upper protective shell 202. Through the rotation coordination of the support base plate 203 and the support shaft 204, the upper protective shell 202 can be rotated, thereby achieving the matching of the angle of the support mechanism 1 with the HDPE pipe.

[0035] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A support device for HDPE pipe welding, characterized in that: The invention comprises a housing (201), an upper protective housing (202) is arranged above the housing (201), three evenly distributed through holes are opened on the side of the upper protective housing (202), a translation transmission mechanism (4) is arranged inside the upper protective housing (202), the translation transmission mechanism (4) comprises an active sliding shaft (404), the active sliding shaft (404) is slidably connected to the middle through hole of the upper protective housing (202), the middle of the active sliding shaft (404) is slidably connected to a bidirectional active shaft (409), one end of the active sliding shaft (404) outside the upper protective housing (202) is slidably connected to a bidirectional hand wheel (401), and the surface of the bidirectional hand wheel (401) is fixedly connected to a A baffle rotating shaft (403), the baffle rotating shaft (403) is rotatably connected to a driving shaft baffle (408), the driving sliding shaft (404) is located on the outer side of the upper protective shell (202) and is slidably connected to a bidirectional driving gear (415), the end of the driving sliding shaft (404) is fixedly connected to a conical pushing block (414), the outer side surface of the conical pushing block (414) is symmetrically slidably connected to a driven sliding shaft (417), the two sides of the bidirectional driving gear (415) are symmetrically meshed with bidirectional driven gears (416), the driven sliding shaft (417) is slidably connected to the middle part of the bidirectional driven gear (416), and one end of the driven sliding shaft (417) is fixedly connected to a trigger rod (418).

2. A support device for HDPE pipe welding according to claim 1, characterized in that: The upper protective shell (202) is symmetrically rotatably connected to threaded rods (410) on both sides, a slide groove is provided in the middle of the end surface of the threaded rod (410), a trigger sliding shaft (421) is slidably connected inside the slide groove, one end of the trigger sliding shaft (421) is fixedly connected to a trigger plate (419), one end of the threaded rod (410) is fixedly connected to the outer side surface of the limit shell (411), the outer side of the trigger sliding shaft (421) is located between the limit shell (411) and the trigger plate (419) and is sleeved with a trigger return spring (420), the limit shell (411) One end of the side driven gear (412) is fixedly connected to the side driven gear (412), one side of the side driven gear (412) is symmetrically rotatably connected to the second rotating link (423) via a bracket, one end of the second rotating link (423) is rotatably connected to the clamping sleeve (424) via a bracket, the middle part of the second rotating link (423) is rotatably connected to the first rotating link (422) via a bracket, the first rotating link (422) is symmetrically rotatably connected to the outer side surface of the trigger plate (419) via a bracket, and one end surface of the trigger plate (419) is abutted against one end of the trigger rod (418).

3. A support device for HDPE pipe welding according to claim 2, characterized in that: The through holes located on both sides of the three through holes of the upper protective shell (202) are rotatably connected to a side driving shaft (407); one end of the side driving shaft (407) located outside the upper protective shell (202) is fixedly connected to a one-way hand wheel (402); one end of the side driving shaft (407) located inside the upper protective shell (202) is fixedly connected to a side driving gear (413); the side driving gear (413) is meshed with the side driven gear (412).

4. A support device for HDPE pipe welding according to claim 3, characterized in that: The upper end surface of the upper protective shell (202) is provided with a support mechanism (1), the support mechanism (1) comprising a main arc-shaped support plate (101), the main arc-shaped support plate (101) being fixedly connected to the upper end surface of the upper protective shell (202), arc-shaped plate support slide grooves (103) being symmetrically fixedly connected on both sides of the upper protective shell (202) and located below the threaded rod (410), an arc-shaped plate support slider (104) being slidably connected in the arc-shaped plate support slide groove (103), the interior of the arc-shaped plate support slider (104) being threadedly connected to the threaded rod (410), and the upper end surface of the arc-shaped plate support slider (104) being fixedly connected to a side arc-shaped support plate (102).

5. A supporting device for HDPE pipe welding according to claim 4, characterized in that: The lower end surface of the main arc-shaped support plate (101) is fixedly connected to a driving shaft support sleeve (105) via a fixing rod; the driving shaft support sleeve (105) is rotatably connected to the outer side surfaces of the bidirectional driving shaft (409) and the side driving shaft (407); the lower end surface of the main arc-shaped support plate (101) is fixedly connected to a driving gear baffle (107) via a fixing rod; the driving gear baffle (107) abuts against the side surface of the bidirectional driving gear (415).

6. A support device for HDPE pipe welding according to claim 5, characterized in that: The driven sliding shaft (417) is square in shape at a portion close to the conical pushing block (414), and is cylindrical in shape at a portion away from the conical pushing block (414). The cylindrical outer surface of the driven sliding shaft (417) is rotatably connected to a driven shaft support sleeve (106), and the driven shaft support sleeve (106) is fixedly connected to the lower end surface of the main arc-shaped support plate (101) via a fixing rod.

7. A support device for HDPE pipe welding according to claim 6, characterized in that: The active sliding shaft (404) is located inside the upper protective shell (202) and is fixedly connected to a limit stopper (405). A main shaft return spring (406) is sleeved outside the bidirectional active shaft (409) and between the limit stopper (405) and the active shaft support sleeve (105).

8. A support device for HDPE pipe welding according to claim 7, characterized in that: A lifting mechanism (5) is provided inside the housing (201), and the lifting mechanism (5) includes a driving worm (502). A through hole is provided on the side of the housing (201), and the driving worm (502) is rotatably connected inside the through hole. One end of the driving worm (502) located outside the housing (201) is fixedly connected to a rotating handle (501). The driving worm (502) is located outside the housing (201) and is rotatably connected to a lifting support sleeve (206). The lifting support sleeve (206) is fixedly connected to the inner side of the housing (201). The driving worm (502) is located inside the housing (201) and is meshedly connected to a driven worm wheel (503). One side of the driven worm wheel (503) is fixedly connected to a fixed rotating shaft (506). The side of the fixed rotating shaft (506) is rotatably connected to a gear support sleeve (208), and the gear support sleeve (208) is fixedly connected to the inner side of the shell (201) via a fixing rod. The other end of the fixed rotating shaft (506) is fixedly connected to an active lifting gear (504). The bottom surface inside the shell (201) is fixedly connected to a vertical sliding sleeve (205), and the inside of the vertical sliding sleeve (205) is slidably connected to a lifting shaft (505). One side of the lifting shaft (505) is provided with teeth, and the lifting shaft (505) is meshed with the active lifting gear (504) via the teeth. The outer side surface of the vertical sliding sleeve (205) is symmetrically fixedly connected to a lifting bracket (207), and the lifting bracket (207) is fixedly connected to the inner bottom surface of the shell (201).

9. A supporting device for HDPE pipe welding according to claim 8, characterized in that: The upper end surface of the lifting shaft (505) is fixedly connected to a supporting base plate (203), the interior of the supporting base plate (203) is rotatably connected to a supporting rotating shaft (204), and the upper end surface of the supporting rotating shaft (204) is fixedly connected to the bottom of the upper protective shell (202).

10. A supporting device for HDPE pipe welding according to claim 9, characterized in that: Universal wheels (3) are provided at the bottom of the housing (201); the universal wheels (3) are evenly distributed at the bottom of the housing (201), and the universal wheels (3) are fixedly connected to the bottom of the housing (201).

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