A support device for HDPE pipe welding

Abstract

The present invention relates to the field of pipeline welding, and in particular to a support device for HDPE pipeline welding. Due to the flexibility of HDPE material and the long length of the pipeline, the middle part of the HDPE pipeline is prone to bending under the action of gravity, which not only affects the overall horizontality, but also produces errors during the welding process, resulting in unsatisfactory welding results and the inability to guarantee welding quality. It includes an outer shell, an upper protective shell is provided above the outer shell, and three evenly distributed through holes are provided on the side of the upper protective shell. A translation transmission mechanism is provided inside the upper protective shell, and the translation transmission mechanism includes an active sliding shaft, which is slidably connected to the middle through hole of the upper protective shell, and the middle part of the active sliding shaft is slidably connected to a bidirectional active shaft. Support is achieved on both sides of the HDPE pipeline, thereby ensuring that the non-welding end and the middle part of the HDPE pipeline are in a horizontal state during welding, making the HDPE pipeline more stable during welding and ensuring the quality of welding.

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 play a vital role in urban water supply, drainage, and gas pipeline projects, providing crucial support for urban infrastructure construction. Furthermore, in farmland irrigation systems, HDPE pipes, due to their excellent weather resistance and aging resistance, can provide long-term, stable water transportation, improving irrigation efficiency. HDPE pipe welding technology is relatively mature, with a variety of welding methods, including butt fusion and electrofusion, all of which enable efficient and reliable pipe connections.

[0003] During the welding process of HDPE pipes, the pipes must be placed horizontally to ensure welding quality and efficiency. However, due to the flexibility of HDPE materials and the long length of the pipes, the pipes are prone to bending in the middle under the action of gravity. This not only affects the overall horizontality but also causes errors during the welding process, resulting in unsatisfactory welding results and unreliable welding quality. Summary of the Invention

[0004] (1) Technical problems to be solved

[0005] In order to overcome the flexibility of HDPE materials and the long pipes, the present invention overcomes the disadvantage that the middle part of the HDPE pipe is prone to bending under the action of gravity. The technical problem to be solved by the present invention is that errors occur during the welding process of the HDPE pipe, resulting in unsatisfactory welding effects and the inability to guarantee welding quality.

[0006] (2) Technical solution

[0007] 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 provided above the shell, three evenly distributed through holes are opened on the side of the upper protective shell, a translation transmission mechanism is provided inside the upper protective shell, the translation transmission mechanism includes an active sliding shaft, the active sliding shaft is slidably connected to the through hole in the middle of the upper protective shell, the middle of the active sliding shaft is slidably connected to a bidirectional active shaft, one end of the active sliding shaft outside the upper protective shell is slidably connected to a bidirectional handwheel, the surface of the bidirectional handwheel is fixedly connected to a baffle rotating shaft, the baffle rotating shaft is rotatably connected to the active shaft baffle, the active sliding shaft is located inside the upper protective shell and is slidably connected to a bidirectional active gear, the end of the active sliding shaft is fixedly connected to a conical pushing block, the outer side of the conical pushing block is symmetrically slidably connected to a driven sliding shaft, both 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 to a trigger rod.

[0008] Preferably, the two sides of the upper protective shell are symmetrically connected to threaded rods, and a sliding groove is opened in the middle of the end face of the threaded rod, and a trigger sliding shaft is slidably connected inside the sliding groove, and one end of the trigger sliding shaft is fixedly connected to the trigger plate, and the outer side surface of one end of the threaded rod is fixedly connected to the limiting shell, and the outer side of the trigger sliding shaft is located between the limiting shell and the trigger plate and is sleeved with a trigger return spring, one end of the limiting shell is fixedly connected to the side driven gear, and one side of the side driven gear is symmetrically connected to the second rotating link through the bracket for rotation, and one end of the second rotating link is rotatably connected to the clamping sleeve through the bracket, and the middle part of the second rotating link is rotatably connected to the first rotating link through the bracket, and the first rotating link is symmetrically 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.

[0009] Preferably, the through holes on both sides of the three through holes of the upper protective shell are rotatably connected to the side driving shaft, the end of the side driving shaft located on the outside of the upper protective shell is fixedly connected to the one-way handwheel, and the end of the side driving shaft located inside the upper protective shell is fixedly connected to the side driving gear, and the side driving gear is meshed with the side driven gear.

[0010] 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 support plate, and the main arc-shaped support plate is fixedly connected to the upper end surface of the upper protective shell, and arc-shaped plate support slide grooves are symmetrically fixedly connected on both sides of the upper protective shell and below the threaded rod, and an arc-shaped plate support slider is slidably connected in the arc-shaped plate support slide groove, and the interior of the arc-shaped plate support slider is threadedly connected to the threaded rod, and the upper end surface of the arc-shaped plate support slider is fixedly connected to a side arc-shaped support plate.

[0011] Preferably, the lower end surface of the main arc-shaped support plate is fixedly connected to a driving shaft support sleeve through a fixing rod, and the driving shaft support sleeve is rotatably connected to the outer side surfaces of the bidirectional driving shaft and the side driving shaft, and the lower end surface of the main arc-shaped support plate is fixedly connected to a driving gear baffle through a fixing rod, and the driving gear baffle is against the side surface of the bidirectional driving gear.

[0012] Preferably, the driven sliding shaft is square in the portion close to the conical pushing block and cylindrical in the portion away from the conical pushing block. The cylindrical outer 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.

[0013] Preferably, the active sliding shaft is located inside the upper protective shell and is fixedly connected to a limit block piece, and a main shaft return spring is sleeved on the outside of the bidirectional active shaft and located between the limit block piece and the active shaft support sleeve.

[0014] 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 is located on the outside of the shell and 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 located inside the shell and is meshed with a driven worm wheel, 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 shell through a fixed rod. The other end of the fixed rotating shaft is fixedly connected to an active lifting gear, and the bottom surface inside the shell is fixedly connected to a vertical sliding sleeve. The inside 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. 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 shell.

[0015] 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.

[0016] Preferably, universal wheels are provided at the bottom of the housing, the universal wheels are evenly distributed at the bottom of the housing, and the universal wheels are fixedly connected to the bottom of the housing.

[0017] (3) Beneficial effects

[0018] 1. Turn the bidirectional handwheel clockwise, the active sliding shaft will drive the bidirectional active gear to rotate clockwise. 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 toward the end away from the upper protective shell, driving the side arc support plate to move, realizing 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 the welding process, making the HDPE pipe more stable during welding and ensuring the quality of welding;

[0019] 2. Turn the one-way handwheel 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 the gear meshing, so as to realize the movement of the unilateral side arc-shaped support plate, making the whole device more suitable for complex working environments and better adapt to support under different conditions;

[0020] 3. Rotate the handle counterclockwise, which will drive the active worm to rotate counterclockwise, and the driven worm to rotate clockwise. The fixed rotating shaft will drive the active lifting gear to rotate clockwise, 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 pipes are at the same height during welding, and facilitating better positioning of the two HDPE pipes during welding;

[0021] 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, thereby better supporting the HDPE pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2It is a schematic diagram of the overall structure of the support mechanism of the present invention;

[0024] Figure 3 This is a schematic diagram of the upper protective shell structure of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the translation transmission mechanism of the present invention;

[0026] Figure 5 This is a schematic diagram of the bidirectional driving shaft structure of the present invention;

[0027] Figure 6 This is a schematic structural diagram of the driven sliding shaft of the present invention;

[0028] Figure 7 is a cross-sectional view of the clamping mechanism of the present invention;

[0029] Figure 8 This is a schematic diagram of the bidirectional handwheel structure of the present invention;

[0030] Figure 9 It is a structural schematic diagram of the lifting mechanism of the present invention;

[0031] Figure 10 It is a cross-sectional view of the lifting axis of the present invention.

[0032] The marks in the accompanying 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 handwheel, 402-unidirectional handwheel, 403-blocking plate rotating shaft, 404-driving sliding shaft, 405-limiting baffle, 406-spindle reciprocating shaft 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 link, 423-second rotating link, 424-clamping sleeve, 5-lifting mechanism, 501-rotating handle, 502-driving worm, 503-driven worm gear, 504-driving lifting gear, 505-lifting shaft, 506-fixed rotating shaft. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings and examples. Example 1

[0034] A support device for HDPE pipe welding, such as Figures 1-10 As shown, it includes a shell 201, a shell 201, an upper protective shell 202 is provided 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 provided inside the upper protective shell 202. The translation transmission mechanism 4 includes an active sliding shaft 404, the active sliding shaft 404 is slidably connected to the middle through hole of the upper protective shell 202, the middle of the active sliding shaft 404 is slidably connected to a bidirectional active shaft 409, and the active sliding shaft 404 is slidably connected to a bidirectional handwheel 401 at one end outside the upper protective shell 202. The surface of the bidirectional handwheel 401 is fixedly connected to a baffle rotating shaft 403, the baffle rotating shaft 403 is rotatably connected to the 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 the end of the active sliding shaft 404 is fixedly connected to a conical pushing block 414. The outer side of the conical pushing block 414 is symmetrically slidably connected to a driven sliding shaft 417. The end surface of the driven sliding shaft 417 connected to the conical pushing block 414 is relatively smooth, which facilitates the sliding of the driven sliding shaft 417 on the surface of the conical pushing block 414. 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 this end of the driven sliding shaft 417 can rotate driven by the bidirectional driven gear 416. 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 the limiting block 405. A main shaft reset spring 406 is provided on the outside of the bidirectional active shaft 409 and between the limiting block 405 and the active shaft support sleeve 105. The main shaft reset spring 406 can support the active sliding shaft 404 to reset after use.

[0035] The upper protective shell 202 is symmetrically connected to the threaded rod 410 on both sides of the rotation, and the middle part of the end face of the threaded rod 410 is provided with a slide groove, and the inside of the slide groove is slidably connected to the trigger sliding shaft 421, and one end of the trigger sliding shaft 421 is fixedly connected to the trigger plate 419. The outer side surface of one end of the threaded rod 410 is fixedly connected to the limit shell 411, and the outer side of the trigger sliding shaft 421 is located between the limit shell 411 and the trigger plate 419. A trigger return spring 420 is sleeved, and one end of the limit shell 411 is fixedly connected to the side driven gear 412. One side of the wheel 412 is symmetrically connected to the second rotating link 423 through a bracket, and one end of the second rotating link 423 is rotatably connected to the clamping sleeve 424 through the bracket. The inner side of the clamping sleeve 424 is provided with a groove, which can increase the friction 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 the bracket. The first rotating link 422 is symmetrically connected to the outer side of the trigger plate 419 through the bracket, and one end face of the trigger plate 419 is against one end of the trigger rod 418.

[0036] The through holes on both sides of the three through holes in the upper protective shell 202 are rotatably connected to the side driving shaft 407, and the 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 the 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.

[0037] The upper end surface of the upper protective shell 202 is provided with a support mechanism 1, which includes a main arc-shaped support plate 101, which is fixedly connected to the upper end surface of the upper protective shell 202, and arc-shaped plate support grooves 103 are symmetrically fixedly connected on both sides of the upper protective shell 202 and below the threaded rod 410. An arc-shaped plate support slider 104 is slidingly connected in the arc-shaped plate support groove 103, and the interior of the arc-shaped plate support slider 104 is threadedly connected to the threaded rod 410, and the upper end surface of the arc-shaped plate support slider 104 is fixedly connected to the side arc-shaped support plate 102.

[0038] 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.

[0039] The part of the driven sliding shaft 417 close to the conical pushing block 414 is square, and the part away from the conical pushing block 414 is cylindrical. The cylindrical outer surface of the driven sliding shaft 417 is rotatably connected to the 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.

[0040] 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 on the outside of 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 meshed with a driven worm gear 503. One side of the driven worm gear 503 is fixedly connected to a fixed rotating shaft 506. The fixed rotating shaft 5 The side of 06 is rotatably connected to the gear support sleeve 208, and the gear support sleeve 208 is fixedly connected to the inner side of the shell 201 through a fixed rod. The other end of the fixed rotating shaft 506 is fixedly connected to the active lifting gear 504, and the bottom surface inside the shell 201 is fixedly connected to the vertical sliding sleeve 205. The internal sliding connection of the vertical sliding sleeve 205 is connected to the 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 through the teeth. The outer side surface of the vertical sliding sleeve 205 is symmetrically fixedly connected to the lifting bracket 207, and the lifting bracket 207 is fixedly connected to the inner bottom surface of the shell 201.

[0041] The upper end surface of the lifting shaft 505 is fixedly connected to the supporting base plate 203 , and the interior 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 .

[0042] 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 . Example 2

[0043] Working principle: When the device is required to operate, the HDPE pipe is placed on top of the support mechanism 1. Since the HDPE pipe is a flexible pipe, it may bend during welding, making it impossible to ensure horizontal welding. Horizontal support is provided by adjusting the two-way handwheel 401 or the one-way handwheel 402 on the device. When the device is in the middle of the HDPE pipe and needs to support both sides simultaneously, the active sliding shaft 404 is first pushed into the upper protective shell 202. The limit block 405 squeezes the main shaft return spring 406, rotating the active shaft block 408 along the block rotation axis 403, limiting the reset of the active sliding shaft 404 and ensuring that the active sliding shaft 404 remains in the working state.

[0044] 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 at the same time 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 links 422 on both sides to move toward one end. Under the action of the first rotating link 422, the second rotating link 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 and achieve the clamping of the trigger rod 418.

[0045] At this time, the two-way handwheel 401 is rotated clockwise, and the active sliding shaft 404 will drive the two-way driving gear 415 to rotate clockwise. Under the engagement 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, realizing support to 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.

[0046] 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 return spring 406 will have a return force on the active sliding shaft 404, thereby realizing the return of the active sliding shaft 404. At the same time, the trigger plate 419 will squeeze the trigger return spring 420 during operation. When the active sliding shaft 404 is reset, the trigger return spring 420 will have an elastic force on the trigger plate 419, thereby realizing the return 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, thereby realizing the return of the entire device.

[0047] When the device is close to one end of the HDPE pipe or other situation where one side needs to be supported, it is only necessary to rotate the one-way handwheel 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 unilateral side arc-shaped support plate 102 can be moved. When retracting, the one-way handwheel 402 is rotated counterclockwise to retract the unilateral side arc-shaped support plate 102.

[0048] 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.

[0049] 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 angle of the support mechanism 1 and the HDPE pipe may not match. 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 and the HDPE pipe.

[0050] The above-described embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications, improvements, and substitutions without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended 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 provided above the housing (201), three evenly distributed through holes are provided on the side of the upper protective housing (202), a translation transmission mechanism (4) is provided 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) being rotatably connected to a driving shaft baffle (408), the driving sliding shaft (404) being located on the outer side of the interior of the upper protective shell (202) and being slidably connected to a bidirectional driving gear (415), the end of the driving sliding shaft (404) being fixedly connected to a conical push block (414), the outer side surface of the conical push block (414) being symmetrically slidably connected to a driven sliding shaft (417), the two sides of the bidirectional driving gear (415) being symmetrically meshed with bidirectional driven gears (416), the driven sliding shaft (417) being slidably connected to the middle of the bidirectional driven gear (416), and one end of the driven sliding shaft (417) being fixedly connected to a trigger rod (418); The two sides of the upper protective shell (202) are symmetrically connected to the threaded rod (410), the middle part of the end surface of the threaded rod (410) is provided with a sliding groove, the inside of the sliding groove is slidably connected to the trigger sliding shaft (421), one end of the trigger sliding shaft (421) is fixedly connected to the trigger plate (419), the outer side surface of one end of the threaded rod (410) is fixedly connected to 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 provided 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 connected to the second rotating link (423) through a bracket, one end of the second rotating link (423) is rotatably connected to the clamping sleeve (424) through a bracket, 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 connected to the outer side of the trigger plate (419) through a bracket, and one end surface of the trigger plate (419) is abutted against one end of the trigger rod (418); The through holes 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); and 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).

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

3. A support device for HDPE pipe welding according to claim 2, 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).

4. A supporting device for HDPE pipe welding according to claim 3, characterized in that: The driven sliding shaft (417) is square in shape at a portion close to the conical pushing block (414), and 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.

5. A supporting device for HDPE pipe welding according to claim 4, characterized in that: The active sliding shaft (404) is located inside the upper protective shell (202) and is fixedly connected to a limit block (405). A main shaft return spring (406) is sleeved outside the bidirectional active shaft (409) and located between the limit block (405) and the active shaft support sleeve (105).

6. A supporting device for HDPE pipe welding according to claim 5, 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 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 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) through 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 interior 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) through 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).

7. A supporting device for HDPE pipe welding according to claim 6, characterized in that: The upper end surface of the lifting shaft (505) is fixedly connected to the supporting base plate (203), the interior of the supporting base plate (203) is rotatably connected to the 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).

8. The HDPE pipe welding support device according to claim 7, 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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