Surrounding welding device for butt joint machining of large steel pipe piles

Abstract

The invention relates to the technical field of welding, and discloses a surrounding welding device for butt-joint processing of large steel pipe piles, which comprises a base, an arc-shaped groove is formed in the top of the base, and top grooves are formed in two sides of the bottom of the arc-shaped groove; a cavity is formed in the base, and the top groove is communicated with the cavity; a lifting block is vertically connected into the top groove in a sliding mode, the lifting block can vertically move in the cavity, and an arc-shaped block is arranged on the lifting block. And the welding structure is used for welding the butt joint position of the two steel pipe piles, and the power mechanism is used for driving the two lifting blocks to vertically move at the same time. According to the scheme, the problem that the positioning mode of an existing welding device for the steel pipe column is tedious in operation is mainly solved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a surrounding welding device for butt-jointing processing of large steel pipe piles. Background Art

[0002] In the process of infrastructure construction, people need to use large steel pipe piles and weld them according to specific needs, including butt welding two steel pipe piles together. The traditional welding method requires manual assistance to align and fix the two steel pipe piles before welding them. However, during the welding process, the steel pipe piles may move, causing the two steel pipe piles to be misaligned, resulting in large welding errors.

[0003] In order to solve the above problems, a Chinese patent with publication number CN214161956U discloses a construction steel pipe column welding auxiliary device, including a base, the top of the base is fixedly connected to the bottom of a fixing frame, the top of the fixing frame is fixedly connected to the bottom of a fixing ring, the inner wall of one side of the fixing ring is threadedly connected to the outer surface of a bolt, one end of the bolt is rotatably connected to one side of a claw, the inner wall of the other side of the claw is rotatably connected to the end of a rotating rod, and the outer surface of the middle part of the rotating rod is fixedly sleeved with the inner wall of a roller; the top of the base is fixedly connected to the bottom of the fixing frame The top of the second fixing frame is fixedly connected to the bottom of the second fixing ring, the inner wall of one side of the second fixing ring is threadedly connected to the outer surface of the second bolt, one end of the second bolt is rotatably connected to one side of the second claw, the inner wall of the other side of the second claw is rotatably connected to one end of the second rotating rod, and the outer surface of the middle part of the second rotating rod is fixedly sleeved with the inner wall of the second roller; this patent can clamp and position the two steel pipe columns by adjusting the positions of the first claw and the second claw, so that the two steel pipe columns are aligned for welding, and the two steel pipe columns will not be displaced during welding, thereby ensuring the accuracy of welding.

[0004] The above patent has the following problems during actual use: there are multiple claws 1 on the fixing ring 1, and multiple claws 2 on the fixing ring 2, and each claw 1 and each claw 2 need to be adjusted individually to clamp and position the two steel pipe columns, resulting in cumbersome operation and low efficiency; and the adjusted position of each claw 1 on the fixing ring 1 needs to be consistent with the adjusted position of each claw 2 on the fixing ring 2 to ensure that the two steel pipe columns are aligned, resulting in greater difficulty in operation. Summary of the invention

[0005] The present invention aims to provide a surrounding welding device for large steel pipe pile butt processing, so as to solve the problem that the existing welding device has complicated operation in positioning the steel pipe column.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a surrounding welding device for large steel pipe pile butt joint processing, including a base, an arc groove is provided on the top of the base, and top grooves are provided on both sides of the bottom of the arc groove; a chamber is provided inside the base, and the top groove is communicated with the chamber; a lifting block is vertically slidably connected in the top groove, and the lifting block can move vertically in the chamber, and an arc block is provided on the lifting block; it also includes a welding structure for welding the butt joints of two steel pipe piles, and a power mechanism for simultaneously driving the two lifting blocks to move vertically.

[0007] Furthermore, both sides of the top of the base are provided with slide grooves, the distance between the two slide grooves is greater than the distance between the two top grooves, a push block is horizontally slidably connected in the slide groove, and an adjustment mechanism for adjusting the distance between the two push blocks is also included.

[0008] Furthermore, the adjustment mechanism includes a bidirectional screw rotatably connected to the chamber, a guide rod fixed to the chamber and a driving part for driving the bidirectional screw to rotate. Both ends of the bidirectional screw are threadedly connected with adjustment blocks, the adjustment block is slidably connected to the guide rod, and the push block is fixed to the adjustment block.

[0009] Furthermore, the power mechanism includes a power unit located on both sides of the chamber, the power unit includes an inclined groove opened on the inner wall of the chamber and a vertical groove opened on the top of the adjusting block, the spacing between the two inclined grooves gradually decreases from top to bottom, a movable block is slidably connected in the inclined groove; a vertical block is slidably connected in the vertical groove, and the movable block is fixedly connected to the vertical block; a transverse groove is provided on the top of the vertical block, a transverse block is slidably connected in the transverse groove, and the lifting block is fixedly connected to the transverse block.

[0010] Furthermore, both sides of the chamber are rotatably connected with a rotating shaft, and a cam for resisting the steel pipe pile is coaxially connected to the rotating shaft, and the cam can rotate in the top groove; it also includes a linkage mechanism that drives the rotating shaft to rotate as the lifting block moves.

[0011] Furthermore, the lifting block is U-shaped, and the arc block is arranged between the two ends of the lifting block, and the arc block is located above the base; both ends of the lifting block are vertically provided with through holes, and the rotating shaft can move and rotate vertically in the through holes; the linkage mechanism includes a first gear coaxially connected to the rotating shaft and located on both sides of the cam, and a bar rack fixedly connected to the two ends of the lifting block, and the bar rack is meshed with the first gear.

[0012] Furthermore, both ends of the lifting block are rotatably connected to a circular shaft, and a torsion spring is provided between the circular shaft and the lifting block; a support arm for resisting the steel pipe pile is provided on the circular shaft, and the two support arms are located on the motion trajectory of the cam, and the support arms can rotate in the top groove.

[0013] Furthermore, side blocks are provided at both ends of the lifting block, and side grooves are provided on the side blocks. A slider for being squeezed by the end face of the cam is slidably connected in the side groove, and a spring is provided between the slider and the side groove; an elastic block for resisting against the support arm is provided between the slider and the side block, and the elastic block is arc-shaped, and the convex part of the elastic block is arranged toward the direction of the support arm; the width of the cam gradually decreases from the side close to the cam protrusion to the side away from the cam protrusion.

[0014] Furthermore, one end of the sliding block away from the sliding groove is an arc-shaped surface.

[0015] Furthermore, the welding mechanism includes an annular block and an auxiliary groove opened on the base. A number of welding heads are equidistantly arranged on the annular block in the circumferential direction. The annular block can rotate in the auxiliary groove. An annular rack is arranged on the annular block. The auxiliary groove is located between the two top grooves. A transverse shaft is rotatably connected in the auxiliary groove. A second gear is coaxially connected to the transverse shaft, and the second gear is meshed with the annular rack. Protective rings are arranged on both sides of the auxiliary groove, and the two ends of the annular block are rotatably connected to the two protective rings respectively. It also includes a rotating part for driving the transverse shaft to rotate.

[0016] The principles and advantages of this solution are: 1. In this scheme, the bidirectional screw rotates to bring the two adjusting blocks closer, and the adjusting block drives the pushing block to move synchronously, so that the two pushing blocks are closer, and the two pushing blocks squeeze the two steel pipe piles to bring the two steel pipe piles closer, so that the two steel pipe piles are against each other; when the bidirectional screw stops rotating, the adjusting block and the pushing block can be stopped, and then the two push blocks can be used to clamp and position the two steel pipe piles; compared with the prior art, this scheme only requires the rotation and stopping of the bidirectional screw to achieve the approach, alignment, against and positioning of the two steel pipe piles, which is easy to operate and has higher work efficiency.

[0017] 2. In this scheme, the steel pipe piles are located in the arc groove, which can play a role in centering and limiting the steel pipe piles. On the one hand, it promotes the alignment of the two steel pipe piles, and on the other hand, it can prevent the steel pipe piles from falling.

[0018] 3. In this scheme, during the lateral movement of the adjusting block, the adjusting block drives the vertical block to move lateral, and the vertical block drives the movable block to move obliquely downward along the path of the inclined groove, so that the vertical block moves downward in the vertical groove; during the lateral movement of the vertical block, the transverse block moves relatively transversely in the transverse groove; during the downward movement of the vertical block, the vertical block pulls the lifting block and the arc block downward through the transverse block, so that the arc block and the steel pipe pile are abutted, thereby achieving the compression of the steel pipe pile; therefore, during the period when the two adjusting blocks approach horizontally, the two steel pipe piles can be compressed at the same time, and the positioning effect of the two steel pipe piles can be enhanced, thereby ensuring the alignment and abutment of the two steel pipe piles, that is, ensuring the accuracy of the welding at the abutment of the two steel pipe piles.

[0019] 4. This solution can achieve the clamping and pressing of the two steel pipe piles by bringing the two adjustment blocks closer together. On the one hand, the steel pipe piles can be positioned from different positions, and on the other hand, the movement of the two steel pipe piles in the horizontal and vertical directions can be restricted to ensure the alignment and abutment of the two steel pipe piles, that is, to ensure the accuracy of the welding at the abutment of the two steel pipe piles.

[0020] 5. During the downward movement of the lifting block of this scheme, the lifting block drives the bar rack to move downward, the bar rack meshes with the first gear to drive the rotating shaft to rotate, and the rotating shaft drives the cam to rotate, so that the cam rotates. When the steel pipe pile is positioned, the lifting block also stops, and the raised part of the cam rotates to the top groove and abuts against the bottom of the steel pipe pile, thereby supporting the steel pipe pile; when the arc groove is damaged, tilted or sunk near the auxiliary groove, the steel pipe pile may tilt or shift, making the two steel pipe piles unable to align. The steel pipe pile can be supported by the cam to ensure that the position of the steel pipe pile will not deviate, thereby ensuring that the two steel pipe piles are always aligned.

[0021] 6. During the rotation of the cam in this scheme, the cam squeezes the two support arms to rotate at the same time, and the torsion spring is deformed; the two support arms continue to rotate, and when the steel pipe pile is positioned, the lifting block stops, the cam also stops, and the support arm rotates to the top groove and abuts against the bottom of the steel pipe pile, thereby supporting the steel pipe pile and further strengthening the supporting effect on the steel pipe pile.

[0022] 7. In this solution, the free ends of the two support arms are located on both sides of the cam, so that the free ends of the two support arms and the raised parts of the cam support the steel pipe pile at three locations, thereby increasing the support range and enhancing the support effect.

[0023] 8. During the rotation of the cam in this scheme, due to the change in the width of the cam, the two ends of the cam squeeze the two sliders respectively, and the sliders move toward the inside of the side groove, and the springs are compressed, that is, the two sliders move away; during the movement of the sliders, the free ends of the sliders approach the side blocks, making the protrusion of the elastic blocks larger and larger. When positioning the steel pipe pile, the upward protruding part of the elastic block is against the support arm, thereby supporting the support arm, and then strengthening the support effect on the steel pipe pile through the support arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a surrounding welding device for butt-jointing processing of large steel pipe piles according to the present invention; Figure 2 for Figure 1 The main view; Figure 3 for Figure 2 Sectional view in the AA direction; Figure 4 for Figure 3 Enlarged view of point B in the middle; Figure 5 for Figure 1 A top view of Figure 6 for Figure 1 Sectional view in the main viewing direction; Figure 7 for Figure 6 Enlarged view of center C. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods: The figure marks in the drawings of the specification include: base 10, arc groove 11, top groove 12, chamber 13, lifting block 14, arc block 15, annular block 20, auxiliary groove 21, welding head 22, annular rack 23, second gear 24, protective ring 25, first motor 26, slide groove 30, push block 31, bidirectional screw 32, guide rod 33, adjustment block 34, second motor 35, inclined groove 40, vertical groove 41, vertical block 42, horizontal block 43, movable block 44, rotating shaft 50, cam 51, first gear 52, bar rack 53, through hole 54, round shaft 60, support arm 61, side block 62, slider 63, elastic block 64, arc surface 70, steel pipe pile 80.

[0026] Basically as attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 , Attachment Figure 7 As shown: a surrounding welding device for large steel pipe pile butt processing, including a base 10, the top of the base 10 is provided with an arc groove 11 along the length direction of the base 10, the steel pipe pile 80 can contact with the arc groove 11 more fully, and the limiting effect is better; both sides of the bottom of the arc groove 11 are provided with top grooves 12; the interior of the base 10 is provided with a chamber 13, the arc groove 11 and the top groove 12 are communicated with the chamber 13; a lifting block 14 is vertically slidably connected in the top groove 12, the lifting block 14 can move vertically in the chamber 13, and an arc block 15 is fixed to the lifting block 14.

[0027] It also includes a welding structure for welding the joints of the two steel pipe piles 80, the welding mechanism includes an annular block 20, an auxiliary groove 21 opened in the middle of the base 10, a plurality of welding heads 22 are fixedly connected to the annular block 20 at equal intervals in the circumferential direction, an annular rack 23 is fixedly connected to the outer wall of the annular block 20, and the annular block 20 and the annular rack 23 can both rotate in the auxiliary groove 21; the auxiliary groove 21 is located between the two top grooves 12, a transverse shaft is rotatably connected in the auxiliary groove 21, a second gear 24 is coaxially connected to the transverse shaft, and the second gear 24 is meshed with the annular rack 23; protective rings 25 are fixedly connected on both sides of the auxiliary groove 21, and the two ends of the annular block 20 are respectively rotatably connected to the two protective rings 25, and the steel pipe pile 80 can pass through the protective rings 25 and the annular block 20; it also includes a rotating part for driving the transverse shaft to rotate, the rotating part is a first motor 26, the first motor 26 is fixedly connected in the auxiliary groove 21, and the output shaft of the first motor 26 is coaxially connected to the transverse shaft.

[0028] Slide grooves 30 are provided on both sides of the top of the base 10, and the spacing between the two slide grooves 30 is greater than the spacing between the two top grooves 12. A push block 31 is slidably connected transversely in the slide groove 30, and also includes an adjustment mechanism for adjusting the spacing between the two push blocks 31. The adjustment mechanism includes a bidirectional screw 32 rotatably connected to the chamber 13, a guide rod 33 fixed to the chamber 13, and a driving part for driving the bidirectional screw 32 to rotate. Both ends of the bidirectional screw 32 are threadedly connected with an adjustment block 34, the adjustment block 34 is slidably connected to the guide rod 33, and the push block 31 is fixed to the adjustment block 34; the driving part is a second motor 35, the second motor 35 is fixed to the chamber 13, and the output shaft of the second motor 35 is coaxially connected to the bidirectional screw 32.

[0029] It also includes a power mechanism for simultaneously driving the two lifting blocks 14 to move vertically, the power mechanism includes a power unit located on both sides of the chamber 13, the power unit includes an inclined groove 40 opened on the inner wall of the chamber 13, and a vertical groove 41 opened on the top of the adjustment block 34, the spacing between the two inclined grooves 40 gradually decreases from top to bottom, a movable block 44 is slidably connected in the inclined groove 40; a vertical block 42 is slidably connected in the vertical groove 41, and the movable block 44 is fixedly connected to the vertical block 42; a transverse groove is opened on the top of the vertical block 42, a transverse block 43 is slidably connected in the transverse groove, and the lifting block 14 is fixedly connected to the transverse block 43.

[0030] The chamber 13 has a rotating shaft 50 rotatably connected on both sides, and a cam 51 for abutting against the steel pipe pile 80 is coaxially connected to the rotating shaft 50, and the cam 51 can rotate in the top groove 12; it also includes a linkage mechanism that drives the rotating shaft 50 to rotate as the lifting block 14 moves. The lifting block 14 is U-shaped, and the arc block 15 is arranged between the two ends of the lifting block 14, and the arc block 15 is located above the base 10; both ends of the lifting block 14 have vertical through holes 54, and the rotating shaft 50 can move and rotate vertically in the through holes 54; the linkage mechanism includes a first gear 52 coaxially connected to the rotating shaft 50 and located on both sides of the cam 51, and a bar rack 53 fixed to the two ends of the lifting block 14, the bar rack 53 is located in the chamber 13, and the bar rack 53 is meshed with the first gear 52.

[0031] Both ends of the lifting block 14 are rotatably connected to a round shaft 60, and a torsion spring is fixed between the round shaft 60 and the lifting block 14; the round shaft 60 is located in the chamber 13, and a support arm 61 for resisting the steel pipe pile 80 is fixed on the round shaft 60. The two support arms 61 are both located on the motion trajectory of the cam 51, and the support arms 61 can rotate in the top groove 12. Both ends of the lifting block 14 are fixedly connected with side blocks 62, and the side blocks 62 are located below the circular shaft 60. Side grooves are opened on the side walls of the side blocks 62, and a slider 63 for being squeezed by the end face of the cam 51 is slidably connected in the side grooves, and a spring is fixedly connected between the slider 63 and the side grooves; an elastic block 64 for resisting against the support arm 61 is fixedly connected between the slider 63 and the side block 62, and the elastic block 64 is an elastic iron sheet, and the elastic block 64 is arc-shaped, and the convex part of the elastic block 64 is arranged toward the support arm 61, and the elastic block 64 can move in the top groove 12; the width of the cam 51 gradually decreases from the side close to the protruding portion of the cam 51 to the side away from the protruding portion of the cam 51, and the spacing between the free ends of the two sliders 63 is greater than the minimum width of the cam 51, and the spacing between the free ends of the two sliders 63 is less than the maximum width of the cam 51; in the initial state, the side with the smallest width of the cam 51 faces upward, and the side with the largest width of the cam 51 faces upward, and the free ends of the two sliders 63 are located on both sides of the side with the smallest width of the cam 51.

[0032] The specific implementation process is as follows: When in use, the two steel pipe piles 80 are placed on both sides of the arc groove 11 respectively, that is, the two steel pipe piles 80 are located on both sides of the auxiliary groove 21 .

[0033] The second motor 35 is started, and the output shaft of the second motor 35 drives the bidirectional screw 32 to rotate, so that the two adjusting blocks 34 move laterally, that is, the two adjusting blocks 34 approach each other; during the lateral movement of the adjusting block 34, the lateral block 43 drives the push block 31 to move synchronously, so that the two push blocks 31 approach each other; during the lateral movement of the push block 31, the push block 31 pushes the steel pipe pile 80 to move laterally, and the steel pipe pile 80 passes through the protective ring 25 and the annular block 20, so that the two steel pipe piles 80 approach each other, and the push block 31 continues to move laterally. When the two steel pipe piles 80 abut against each other, the second motor 35 is turned off to stop the bidirectional screw 32, and then the push block 31 is stopped by the adjusting block 34, that is, the two steel pipe piles 80 are clamped and positioned by the two push blocks 31, and the two steel pipe piles 80 are also butted against each other, and at this time, the abutting point of the two steel pipe piles 80 is located in the annular block 20, and the welding head 22 faces the abutting point of the two steel pipe piles 80.

[0034] During the lateral movement of the adjusting block 34, the adjusting block 34 drives the vertical block 42 to move lateral, and the vertical block 42 drives the movable block 44 to move obliquely downward along the path of the inclined groove 40, so that the vertical block 42 moves downward in the vertical groove 41; during the lateral movement of the vertical block 42, the transverse block 43 moves relatively transversely in the transverse groove; during the downward movement of the vertical block 42, the vertical block 42 pulls the lifting block 14 and the arc block 15 downward through the transverse block 43. When the steel pipe pile 80 is positioned, the lifting block 14 and the arc block 15 are also stopped. At this time, the arc block 15 is against the steel pipe pile 80, thereby realizing the compression of the steel pipe pile 80, further strengthening the positioning effect of the steel pipe pile 80, and then ensuring the docking of the two steel pipe piles 80.

[0035] During the downward movement of the lifting block 14, the lifting block 14 drives the bar rack 53 to move downward, and the bar rack 53 is engaged with the first gear 52 to drive the rotating shaft 50 to rotate, and the rotating shaft 50 drives the cam 51 to rotate, so that the cam 51 rotates. When the steel pipe pile 80 is positioned, the lifting block 14 also stops, and the raised part of the cam 51 rotates to the top groove 12 and abuts against the bottom of the steel pipe pile 80, thereby supporting the steel pipe pile 80; when the arc groove 11 is damaged, tilted or sunk near the auxiliary groove 21, the steel pipe pile 80 may tilt or shift, so that the two steel pipe piles 80 cannot be aligned. The steel pipe pile 80 can be supported by the cam 51 to ensure that the position of the steel pipe pile 80 will not deviate, thereby ensuring that the two steel pipe piles 80 are always aligned.

[0036] During the rotation of the cam 51, the cam 51 simultaneously squeezes the two support arms 61 to rotate, and the torsion spring is deformed; the two support arms 61 continue to rotate, and when the steel pipe pile 80 is positioned, the lifting block 14 stops, and the cam 51 also stops, and the support arms 61 rotate to the top groove 12 and abut against the bottom of the steel pipe pile 80, thereby supporting the steel pipe pile 80 and further strengthening the supporting effect on the steel pipe pile 80; and, the free ends of the two support arms 61 are located on both sides of the cam 51, so that there are three supporting positions of the free ends of the two support arms 61 and the raised parts of the cam 51 on the steel pipe pile 80, which increases the support range and strengthens the support effect.

[0037] During the rotation of the cam 51, due to the change in the width of the cam 51, the two ends of the cam 51 squeeze the two sliders 63 respectively, and the sliders 63 move toward the inside of the side groove, and the spring is compressed, that is, the two sliders 63 move away from each other; during the movement of the sliders 63, the free ends of the sliders 63 approach the side blocks 62, so that the protrusion amplitude of the elastic block 64 becomes larger and larger. When the steel pipe pile 80 is positioned, the upward protruding part of the elastic block 64 is against the support arm 61, thereby supporting the support arm 61, and then strengthening the support effect of the steel pipe pile 80 through the support arm 61.

[0038] After the two steel pipe piles 80 are docked, aligned and positioned, the first motor 26 is started, and the output shaft of the first motor 26 drives the second gear 24 to rotate, and the second gear 24 engages with the annular rack 23 to drive the annular block 20 to rotate, and the annular block 20 drives the welding head 22 to move synchronously, that is, the welding head 22 is used to weld the abutting parts of the two steel pipe piles 80.

[0039] In this embodiment, one end of the slider 63 away from the slide groove 30 is an arc-shaped surface 70, so as to reduce the friction between the slider 63 and the end surface of the cam 51, so that the movement of the slider 63 is smoother.

[0040] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A surrounding welding device for large steel pipe pile butt processing, comprising a base, characterized in that: An arc-shaped groove is provided on the top of the base, and top grooves are provided on both sides of the bottom of the arc-shaped groove; a chamber is provided inside the base, and the top groove is communicated with the chamber; a lifting block is vertically slidably connected in the top groove, and the lifting block can move vertically in the chamber, and an arc-shaped block is provided on the lifting block; it also includes a welding structure for welding the joints of two steel pipe piles, and a power mechanism for simultaneously driving the two lifting blocks to move vertically.

2. The circumferential welding device for large steel pipe pile butt joint processing according to claim 1 is characterized in that: Slide grooves are arranged on both sides of the top of the base, the distance between the two slide grooves is greater than the distance between the two top grooves, a push block is horizontally slidably connected in the slide groove, and an adjustment mechanism for adjusting the distance between the two push blocks is also included.

3. The circumferential welding device for butt welding of large steel pipe piles according to claim 2 is characterized in that: The adjustment mechanism includes a bidirectional screw rotatably connected to the chamber, a guide rod fixed to the chamber and a driving part for driving the bidirectional screw to rotate. Both ends of the bidirectional screw are threadedly connected with adjustment blocks, the adjustment block is slidably connected to the guide rod, and the push block is fixed to the adjustment block.

4. The circumferential welding device for large steel pipe pile butt joint processing according to claim 3 is characterized in that: The power mechanism includes a power part located on both sides of the chamber, and the power part includes an inclined groove opened on the inner wall of the chamber and a vertical groove opened on the top of the adjusting block. The spacing between the two inclined grooves gradually decreases from top to bottom. A movable block is slidably connected in the inclined groove; a vertical block is slidably connected in the vertical groove, and the movable block is fixedly connected to the vertical block; a transverse groove is provided on the top of the vertical block, a transverse block is slidably connected in the transverse groove, and the lifting block is fixedly connected to the transverse block.

5. The circumferential welding device for large steel pipe pile butt joint processing according to claim 4 is characterized in that: Both sides of the chamber are rotatably connected with rotating shafts, and a cam for resisting against the steel pipe pile is coaxially connected to the rotating shaft, and the cam can rotate in the top groove; it also includes a linkage mechanism that drives the rotating shaft to rotate as the lifting block moves.

6. The circumferential welding device for butt welding of large steel pipe piles according to claim 5, characterized in that: The lifting block is U-shaped, and the arc block is arranged between the two ends of the lifting block, and the arc block is located above the base; both ends of the lifting block are vertically provided with through holes, and the rotating shaft can move and rotate vertically in the through holes; the linkage mechanism includes a first gear coaxially connected to the rotating shaft and located on both sides of the cam, and a bar rack fixedly connected to the two ends of the lifting block, and the bar rack is meshed with the first gear.

7. The circumferential welding device for butt welding of large steel pipe piles according to claim 6, characterized in that: Both ends of the lifting block are rotatably connected with round shafts, and a torsion spring is provided between the round shaft and the lifting block; the round shaft is provided with a support arm for resisting the steel pipe pile, and the two support arms are located on the movement track of the cam, and the support arms can rotate in the top groove.

8. The circumferential welding device for butt welding of large steel pipe piles according to claim 7, characterized in that: Both ends of the lifting block are provided with side blocks, and side grooves are provided on the side blocks. A slider for being squeezed by the end face of the cam is slidably connected in the side groove, and a spring is provided between the slider and the side groove; an elastic block for resisting against the support arm is provided between the slider and the side block, and the elastic block is arc-shaped, and the raised part of the elastic block is arranged toward the direction of the support arm, and the elastic block can move in the top groove; the width of the cam gradually decreases from the side close to the cam protrusion to the side away from the cam protrusion.

9. The circumferential welding device for large steel pipe pile butt joint processing according to claim 8, characterized in that: One end of the sliding block away from the sliding groove is an arc-shaped surface.

10. The circumferential welding device for butt welding of large steel pipe piles according to claim 9, characterized in that: The welding mechanism includes an annular block and an auxiliary groove provided on a base. A plurality of welding heads are equidistantly arranged on the annular block in the circumferential direction. The annular block can rotate in the auxiliary groove. An annular rack is arranged on the annular block. The auxiliary groove is located between two top grooves. A transverse shaft is rotatably connected in the auxiliary groove. A second gear is coaxially connected to the transverse shaft, and the second gear is meshed with the annular rack. Protective rings are arranged on both sides of the auxiliary groove. The two ends of the annular block are rotatably connected to the two protective rings respectively. The annular block also includes a rotating part for driving the transverse shaft to rotate.

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