A pipe end portion butt joint auxiliary device and method

Abstract

This invention discloses an auxiliary device and method for pipe end docking, relating to the field of pipe docking technology. The device includes an annular base, with a control rotation box fixedly connected to the inner wall of the annular base. A first rotating shaft is rotatably connected to the inner wall of the control rotation box via bearings. A protective block with an L-shaped cross-section is fixedly connected to the upper surface of the control rotation box. The first rotating shaft extends through the control rotation box and is rotatably connected to the inner wall of the protective block via bearings. A first rotating rod is fixedly connected to the portion of the first rotating shaft outside the control rotation box. A second rotating rod is fixedly connected to the outer wall of the protective block. The device also includes a rotation mechanism and a limiting mechanism. This invention, by setting a rotation mechanism, allows users to easily adjust the angle between the first and second rotating rods, achieving the purpose of rotating and docking the pipe at a certain angle with high precision.

Description

Technical Field

[0001] This invention relates to the field of pipeline docking technology, specifically to an auxiliary device and method for docking pipeline ends. Background Technology

[0002] Pipelines are generally welded during construction to achieve the required installation effect and length. Therefore, assembly and welding operations are usually required during pipeline construction. Conventional assembly and welding are completed on the ground or steps.

[0003] According to announcement number CN113733576B, this relates to the technical field of pipe docking devices, specifically a drainage pipe docking device and method, including a base, a sliding frame mounted on the base, and a heat-fusion structure mounted on the base. The sliding frame is equipped with a positioning rod for simultaneously limiting the pipe in both the circumferential and axial directions. A positioning element for fixing the pipe is inserted radially along the positioning rod. At least two sliding frames are provided, and at least one of them is slidably connected to the base. The heat-fusion structure is detachably connected to the base and used to heat the pipe end. This drainage pipe docking device can only dock two pipes in the same direction and cannot dock pipes at different angles, thus limiting its applicability.

[0004] Based on this, a pipe end connection auxiliary device and method are provided, which can eliminate the drawbacks of existing devices. Summary of the Invention

[0005] The purpose of this invention is to provide an auxiliary device and method for connecting pipe ends, so as to solve the problem that the application scope of pipe connection devices in the prior art is narrow.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A pipe end docking auxiliary device includes an annular base. A control rotating box is fixedly connected to the inner wall of the annular base. A first rotating shaft is rotatably connected to the inner wall of the control rotating box via a bearing. A protective block with an L-shaped cross-section is fixedly connected to the upper surface of the control rotating box. The first rotating shaft extends through the control rotating box and is rotatably connected to the inner wall of the protective block via a bearing. A first rotating rod is fixedly connected to the portion of the first rotating shaft outside the control rotating box. A second rotating rod is fixedly connected to the outer wall of the protective block. The device also includes a rotating mechanism and a limiting mechanism. The rotating mechanism is disposed inside the control rotating box and is used to adjust the pipe docking angle. Limiting mechanisms are provided on the sidewalls of the first and second rotating rods away from the protective block to prevent movement during pipe docking.

[0008] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In one alternative embodiment: the rotating mechanism includes a rotating handle, a worm gear, and a worm. The portion of the first rotating shaft located inside the control rotating box is fixedly connected to the worm gear. The side wall of the control rotating box is rotatably connected to the worm through a bearing. The worm extends through the side wall of the control rotating box and the worm to the outside of the annular base. The end of the worm located outside the annular base is fixedly connected to a rotating handle. The worm meshes with the worm gear.

[0010] In one alternative embodiment: the limiting mechanism includes an installation component, a disassembly component, and an adjustment component. The installation component includes an upper limit block, a lower limit block, a lower docking block, an insert block, a first locking block, and an upper docking block. The lower limit block is fixedly connected to the sidewalls of the first and second rotating rods away from the protective block. The lower limit block is rotatably connected to the upper limit block via a hinge. The upper limit block has a semi-circular cross-section, and the lower limit block has a semi-circular cross-section with a protrusion. The upper docking block is fixedly connected to the outer wall of the upper limit block, and the lower docking block is fixedly connected to the outer wall of the lower limit block. An insert block is fixedly connected to the lower surface of the upper docking block. An insert block groove corresponding to the insert block is formed on the upper surface of the lower docking block. A first locking block groove is formed on the inner wall of the insert block groove. A first locking block is slidably connected to the inner wall of the first locking block groove. A damping spring is fixedly connected to the first locking block and the inner wall of the first locking block groove. A groove corresponding to the first locking block is formed on the sidewall of the insert block.

[0011] In one alternative embodiment: the disassembly assembly includes a first pull ring, a first limiting block, and a second rotating shaft. The outer wall of the lower docking block is provided with a first limiting block groove. The inner wall of the first limiting block groove is slidably connected to a first limiting block. The side wall of the first limiting block away from the lower docking block is fixedly connected to a first pull ring. The side wall of the first limiting block near the first locking block is rotatably connected to a second rotating shaft via a bearing. The second rotating shaft extends through and into the first locking block groove and is fixedly connected to the first locking block.

[0012] In one optional embodiment: the adjustment assembly includes a movable block, a pulley mounting block, a pulley, a second pull ring, a second locking block, a ratchet, a stop pawl, a second limiting block, and a pull rope. Each of the upper and lower limit blocks has three movable holes on its sidewalls. Movable blocks are slidably connected to the inner sidewalls of all six movable holes. A pulley mounting block is fixedly connected to the sidewall of each of the six movable blocks located within the upper limit block. The pulley mounting block has a U-shaped cross-section. Several pulleys are rotatably connected to the inner sidewall of the pulley mounting block via pins. Each of the upper and lower limit blocks has three ratchet cavities. The six ratchet cavities are connected to the six movable blocks... The holes are interconnected. The inner sidewall of the ratchet cavity is rotatably connected to a ratchet and a stop pawl via a pin. The ratchet and the stop pawl are engaged in one direction. The sidewall of the moving block near the ratchet is provided with several second locking blocks, which are engaged with the ratchet. A pull rope is fixedly connected to the upper surface of the stop pawl. The outer sidewalls of the upper limit block and the lower limit block are each provided with three second limiting block slots. The inner sidewalls of the three second limiting block slots are slidably connected with second limiting blocks. The pull rope extends through and into the second limiting block slots and is fixedly connected to the second limiting blocks. A second pull ring is fixedly connected to the sidewall of the second limiting block outside the second limiting block slot.

[0013] In one alternative: both the first limiting block and the second limiting block are cuboids.

[0014] In one alternative: the sidewall of the movable block is provided with a limiting protrusion, and the inner sidewall of the movable hole is provided with a groove corresponding to the limiting protrusion, and the sidewall of the limiting protrusion is slidably connected to the inner sidewall of the groove.

[0015] In one alternative: the lower limit block has a plurality of rollers on its lower surface, and the annular base has a roller track on its upper surface, with the plurality of rollers abutting against the inner bottom wall of the roller track.

[0016] In one alternative: the worm is a single-start worm, and the ratio of the number of worm starts to the number of worm wheel teeth is 1:360.

[0017] This invention also discloses a docking method for a pipe end docking auxiliary device, comprising the following steps:

[0018] Step 1: First, rotate the handle. Rotating the handle will drive the worm to rotate, which in turn drives the worm wheel to rotate. The worm wheel will then drive the first rotating shaft to rotate, which in turn drives the first rotating rod to rotate. Adjust the angle between the first and second rotating rods. Since the worm is a single-start worm, the ratio of the number of worm starts to the number of worm wheel teeth is 1:360. For every rotation of the handle, the worm wheel rotates one degree.

[0019] Step 2: After adjusting the required angle, place the two pipes on the two lower limit blocks respectively. Rotate the upper limit block through the hinge to align the insert on the upper docking block with the insert slot of the lower docking block. Through the cooperation of the first locking block and the damping spring, the first locking block is inserted into the groove of the insert block, thus completing the docking and installation of the upper and lower limit blocks.

[0020] Step 3: Push the lower moving block upwards to adjust the height of the two pipes uniformly, and then push the other moving blocks to fix the position of the two pipes, thus completing the radial rotation limit of the pipes;

[0021] Step 4: After radially rotating and limiting the pipes, push the two pipes. Since the rotation of the pulley is in the same direction as the movement of the pipes, the two pipes can be pushed to move towards each other to complete the docking operation.

[0022] Step 5: After welding the two pipes together, pull the second pull ring. The second pull ring moves the second limiting block out of the second limiting block groove. Since the second limiting block is a cuboid, rotate the second limiting block 90 degrees so that the second limiting block is locked outside the second limiting block groove. At this time, the pull rope drives the stop pawl to rotate upward, no longer engaging with the ratchet in one direction. Then pull the moving block out of the moving hole to reset it. Pull the first pull ring to pull the first limiting block out of the first limiting block groove and rotate it a certain angle. Since the first limiting block is a cuboid, it can be locked outside the first limiting block groove. At this time, the second rotating shaft drives the first locking block to leave the groove of the second locking block. Then rotate the upper connecting block to open it. Finally, lift and remove the connected water pipe.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. This invention utilizes a rotating mechanism. Rotating the handle drives the worm gear to rotate, which in turn drives the worm wheel to rotate. The worm wheel then drives the first rotating shaft to rotate, which in turn drives the first rotating rod to rotate. This allows for adjustment of the angle between the first and second rotating rods. Since the worm is a single-headed worm with a worm head to worm wheel tooth ratio of 1:360, each rotation of the handle causes the worm wheel to rotate one degree. This facilitates user adjustment of the angle between the first and second rotating rods, achieving the goal of precisely rotating and connecting pipes at a specific angle.

[0025] 2. The present invention can effectively limit the pipe by setting the adjustment component, preventing the pipe from rotating radially and affecting the pipe welding effect. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the components of the present invention.

[0027] Figure 2This is a first-view diagram of the present invention.

[0028] Figure 3 This is a second perspective view of the present invention.

[0029] Figure 4 This is a schematic diagram of the horizontal pipe connection of the present invention.

[0030] Figure 5 This is a schematic diagram of the vertical pipe connection of the present invention.

[0031] Figure 6 For the present invention Figure 2 Partial cross-sectional view at point AA.

[0032] Figure 7 For the present invention Figure 1 Partial cross-sectional view at point BB.

[0033] Figure 8 For the present invention Figure 2 Partial cross-sectional view at point CC.

[0034] Figure 9 For the present invention Figure 8 Enlarged view of point D in the middle.

[0035] Figure 10 This is a top view of the internal structure of the control rotating box of the present invention.

[0036] Figure reference numerals: 1. Annular base; 2. First rotating rod; 3. Second rotating rod; 4. Rotating handle; 5. Control rotating box; 6. Roller track; 7. Roller; 8. Protective block; 9. First rotating shaft; 10. Worm gear; 11. Worm; 12. Upper limit block; 13. Lower limit block; 14. Moving block; 15. Pulley mounting block; 16. Pulley; 17. Lower connecting block; 18. Insert block; 19. First pull ring; 20. First locking block; 21. First locking block groove; 22. First limiting block; 23. Second rotating shaft; 24. Hinge; 25. Ratchet cavity; 26. Moving hole; 27. Second pull ring; 28. Second locking block; 29. ​​Limiting protrusion; 30. Ratchet; 31. Stop pawl; 32. Second limiting block; 33. Pull rope; 34. Upper connecting block. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] In one embodiment, such as Figures 1-10As shown, a pipe end docking auxiliary device includes an annular base 1. A control rotation box 5 is fixedly connected to the inner wall of the annular base 1. A first rotating shaft 9 is rotatably connected to the inner wall of the control rotation box 5 through a bearing. A protective block 8 is fixedly connected to the upper surface of the control rotation box 5. The protective block 8 has an L-shaped cross-section. The first rotating shaft 9 extends through to the outside of the control rotation box 5 and is rotatably connected to the inner wall of the protective block 8 through a bearing. A first rotating rod 2 is fixedly connected to the part of the first rotating shaft 9 outside the control rotation box 5. A second rotating rod 3 is fixedly connected to the outer wall of the protective block 8. The device also includes a rotating mechanism and a limiting mechanism. The rotating mechanism is set inside the control rotation box 5 and is used to adjust the pipe docking angle. Limiting mechanisms are provided on the side walls of the first rotating rod 2 and the second rotating rod 3 away from the protective block 8 to prevent movement during pipe docking.

[0039] In one embodiment, such as Figure 2 As shown, the rotating mechanism includes a rotating handle 4, a worm gear 10, and a worm 11. The worm gear 10 is fixedly connected to the portion of the first rotating shaft 9 located inside the control rotating box 5. The worm 11 is rotatably connected to the side wall of the control rotating box 5 through a bearing. The worm 11 extends through the control rotating box 5 and the side wall of the worm 11 to the outside of the annular base 1. The rotating handle 4 is fixedly connected to the end of the worm 11 located outside the annular base 1, and the worm 11 meshes with the worm gear 10. Rotating the rotating handle 4 causes the worm 11 to rotate, which in turn causes the worm gear 10 to rotate. The worm gear 10 then causes the first rotating shaft 9 to rotate, which in turn causes the first rotating rod 2 to rotate, allowing adjustment of the angle between the first rotating rod 2 and the second rotating rod 3. Since the worm 11 is a single-headed worm, the ratio of the number of heads in the worm 11 to the number of teeth in the worm gear 10 is 1:360. Each rotation of the rotating handle 4 causes the worm gear 10 to rotate one degree, facilitating user adjustment of the angle between the first rotating rod 2 and the second rotating rod 3 with high precision.

[0040] In one embodiment, such as Figure 8 and Figure 9As shown, the limiting mechanism includes an installation component, a disassembly component, and an adjustment component. The installation component includes an upper limit block 12, a lower limit block 13, a lower docking block 17, an insert block 18, a first locking block 20, and an upper docking block 34. The lower limit block 13 is fixedly connected to the sidewalls of the first rotating rod 2 and the second rotating rod 3 away from the protective block 8. The lower limit block 13 is rotatably connected to the upper limit block 12 via a hinge 24. The upper limit block 12 has a semi-circular cross-section, and the lower limit block 13 has a semi-circular cross-section with a protrusion. The upper limit block 12... An upper connecting block 34 is fixedly connected to the outer wall of the upper connecting block 34, and a lower connecting block 17 is fixedly connected to the outer wall of the lower limiting block 13. An insert block 18 is fixedly connected to the lower surface of the upper connecting block 34. An insert block groove corresponding to the insert block 18 is opened on the upper surface of the lower connecting block 17. A first locking block groove 21 is opened on the inner side wall of the insert block groove. A first locking block 20 is slidably connected to the inner side wall of the first locking block groove 21. A damping spring is fixedly connected to the first locking block 20 and the inner side wall of the first locking block groove 21. A groove corresponding to the first locking block 20 is opened on the side wall of the insert block 18. The two pipes are placed on the two lower limiting blocks 13 respectively. The upper limiting block 12 is rotated through the hinge 24 to align the insert block 18 on the upper connecting block 34 with the insert block groove of the lower connecting block 17. The first locking block 20 is engaged with the damping spring to lock into the groove of the insert block 18, thus completing the docking and installation of the upper limiting block 12 and the lower limiting block 13. The operation is quick and convenient.

[0041] In one embodiment, such as Figure 9 As shown, the disassembly assembly includes a first pull ring 19, a first limiting block 22, and a second rotating shaft 23. A first limiting block groove is formed on the outer wall of the lower connecting block 17. The first limiting block 22 is slidably connected to the inner wall of the first limiting block groove. The first pull ring 19 is fixedly connected to the side wall of the first limiting block 22 away from the lower connecting block 17. The second rotating shaft 23 is rotatably connected to the side wall of the first limiting block 22 near the first locking block 20 via a bearing. The second rotating shaft 23 extends through and into the first locking block groove 21, where it is fixedly connected to the first locking block 20. Pulling the first pull ring 19 pulls the first limiting block 22 out of the first limiting block groove and rotates it a certain angle. Since the first limiting block 22 is a cuboid, it can be locked outside the first limiting block groove. At this time, the second rotating shaft 23 drives the first locking block 20 away from the groove of the second locking block 28. Then, the upper connecting block 34 is rotated open to complete the disassembly. The disassembly operation is quick and convenient.

[0042] In one embodiment, such as Figure 8As shown, the adjustment assembly includes a movable block 14, a pulley mounting block 15, a pulley 16, a second pull ring 27, a second locking block 28, a ratchet 30, a stop pawl 31, a second limiting block 32, and a pull rope 33. The upper limit block 12 and the lower limit block 13 each have three movable holes 26 on their side walls. Movable blocks 14 are slidably connected to the inner side walls of all six movable holes 26. Pulley mounting blocks 15 are fixedly connected to the side walls of the six movable blocks 14 located within the upper limit block 12. The pulley mounting block 15 has a U-shaped cross-section. Several pulleys 16 are rotatably connected to the inner side walls of the pulley mounting block 15 via pins. Three ratchet cavities 25 are respectively opened in the upper limit block 12 and the lower limit block 13. The six ratchet cavities 25 are connected to the six movable holes 26. The moving holes 26 are connected to each other. The inner wall of the ratchet cavity 25 is rotatably connected to the ratchet 30 and the stop pawl 31 by a pin. The ratchet 30 and the stop pawl 31 are engaged in one direction. The side wall of the moving block 14 near the ratchet 30 is provided with several second locking blocks 28. The several second locking blocks 28 are engaged with the ratchet 30. The upper surface of the stop pawl 31 is fixedly connected with a pull rope 33. The outer walls of the upper limit block 12 and the lower limit block 13 are each provided with three second limiting block slots. The inner walls of the three second limiting block slots are slidably connected with second limiting blocks 32. The pull rope 33 extends through and into the second limiting block slot and is fixedly connected to the second limiting block 32. The side wall of the second limiting block 32 located outside the second limiting block slot is fixedly connected with a second pull ring 27. Pushing the lower movable block 14 upwards adjusts the height of the two pipes uniformly. Then, pushing other movable blocks 14 in other positions fixes the position of the two pipes, preventing radial rotation during docking and ensuring a smooth connection. When the movable block 14 moves towards the center of the upper limit block 12 and lower limit block 13, the ratchet 30 and stop pawl 31 engage in a one-way engagement, allowing the ratchet 30 to rotate only in one direction. The second locking block 28 on the side wall of the movable block 14, in conjunction with the ratchet 30, also allows movement only in one direction towards the center of the upper limit block 12 and lower limit block 13 until the pulley 16 at the bottom of the movable block 14 contacts the pipe. Since the movable block 14 can only move in one direction, when the pulley 16 at the bottom of the movable block 14 contacts the pipe, it effectively limits the pipe's position, preventing radial rotation and ensuring a smooth welding effect. After limiting the pipe's radial rotation, pushing the two pipes allows them to move towards each other, completing the docking operation, as the rotation of the pulley 16 is in the same direction as the pipe's movement.

[0043] In one embodiment, such as Figure 1 and Figure 2 As shown, both the first limiting block 22 and the second limiting block 32 are cuboids. The first limiting block 22 and the second limiting block 32 can be rotated at a certain angle and then locked outside the limiting block slots.

[0044] In one embodiment, such as Figure 7As shown, the side wall of the movable block 14 is provided with a limiting protrusion 29, and the inner side wall of the movable hole 26 is provided with a groove corresponding to the limiting protrusion 29. The side wall of the limiting protrusion 29 is slidably connected to the inner side wall of the groove. To prevent the movable block 14 from shaking during its up and down movement, a damper is provided between the limiting protrusion 29 and the inner side wall of the groove to prevent 14 from sliding and falling off on its own.

[0045] In one embodiment, such as Figure 8 As shown, the lower limit block 13 has several rollers 7 on its lower surface, and the annular base 1 has a roller track 6 on its upper surface. The rollers 7 abut against the inner bottom wall of the roller track 6. This reduces the friction between the lower limit block 13 and the annular base 1, reduces wear, and improves the service life of the device.

[0046] In one embodiment, such as Figure 10 As shown, the worm 11 is a single-start worm, and the ratio of the number of starts in the worm 11 to the number of teeth in the worm wheel 10 is 1:360. With the worm 11 being a single-start worm, the ratio of the number of starts in the worm 11 to the number of teeth in the worm wheel 10 is 1:360. Each rotation of the handle 4 causes the worm wheel 10 to rotate one degree, facilitating user adjustment of the angle between the first rotating rod 2 and the second rotating rod 3 with high precision.

[0047] The above embodiment discloses a pipe end docking auxiliary device. In use, firstly, rotate the rotating handle 4. Rotating the handle 4 drives the worm gear 11 to rotate, which in turn drives the worm wheel 10 to rotate. The worm wheel 10 drives the first rotating shaft 9 to rotate, which in turn drives the first rotating rod 2 to rotate. The angle between the first rotating rod 2 and the second rotating rod 3 is adjusted. Since the worm gear 11 is a single-headed worm, the ratio of the number of heads in the worm gear 11 to the number of teeth in the worm wheel 10 is 1:360. For every rotation of the rotating handle 4, the worm wheel 10 rotates one degree, facilitating easy and precise adjustment of the angle between the first rotating rod 2 and the second rotating rod 3. After adjusting the required angle, place the two pipes on the two lower limit blocks 13 respectively. The limiting block 12 rotates via the hinge 24, aligning the insert block 18 on the upper connecting block 34 with the insert slot of the lower connecting block 17. The first locking block 20, in conjunction with the damping spring, engages with the groove of the insert block 18, thus completing the connection and installation of the upper limiting block 12 and the lower limiting block 13. This operation is quick and convenient. Next, the lower moving block 14 is pushed upwards to uniformly adjust the height of the two pipes. Further pushing of other moving blocks 14 positions fixes the two pipes in place, preventing radial rotation during connection and ensuring proper alignment. When the moving block 14 moves towards the center of the upper and lower limiting blocks 12 and 13, the ratchet 30 engages with the stop pawl 31 in one direction, allowing the ratchet 30 to rotate only in one direction. When the second locking block 28 on the side wall of the moving block 14 engages with the ratchet 30, it can only move unidirectionally towards the center of the upper limit block 12 and the lower limit block 13 until the pulley 16 at the bottom of the moving block 14 abuts against the pipe. Since the moving block 14 can only move unidirectionally, when the pulley 16 at the bottom of the moving block 14 is in contact with the pipe, it can effectively limit the pipe and prevent the pipe from rotating radially, thus affecting the pipe welding effect. After limiting the radial rotation of the pipe, the two pipes are pushed. Since the rotation of the pulley 16 is in the same direction as the pipe movement, the two pipes can be pushed to move towards each other to complete the docking operation. After the two docked pipes are welded, the second pull ring 27 is pulled, and the second pull ring 27 drives the second limiting block 32. Move the second limiting block 32 out of the groove. Since the second limiting block 32 is a cuboid, rotate the second limiting block 32 90 degrees so that the second limiting block 32 is stuck outside the groove. At this time, the pull rope 33 drives the stop pawl 31 to rotate upward and no longer engages with the ratchet 30 in one direction. Then pull the moving block 14 out of the moving hole 26 to reset it. Pull the first pull ring 19 to pull the first limiting block 22 out of the groove and rotate it a certain angle. Since the first limiting block 22 is a cuboid, the first limiting block 22 can be stuck outside the groove. At this time, the second rotating shaft 23 drives the first locking block 20 to leave the groove of the second locking block 28. Then rotate the upper connecting block 34 to open it. Finally, lift up and take out the connected water pipe.

[0048] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A pipe end docking auxiliary device, comprising an annular base (1), wherein a control rotating box (5) is fixedly connected to the inner wall of the annular base (1), a first rotating shaft (9) is rotatably connected to the inner wall of the control rotating box (5) through a bearing, a protective block (8) is fixedly connected to the upper surface of the control rotating box (5), the protective block (8) has an L-shaped cross-section, the first rotating shaft (9) extends through to the outside of the control rotating box (5) and is rotatably connected to the inner wall of the protective block (8) through a bearing, a first rotating rod (2) is fixedly connected to the portion of the first rotating shaft (9) outside the control rotating box (5), and a second rotating rod (3) is fixedly connected to the outer wall of the protective block (8), characterized in that, It also includes a rotating mechanism and a limiting mechanism. The rotating mechanism is set in the control rotating box (5) and is used to adjust the pipe docking angle. The first rotating rod (2) and the second rotating rod (3) are both provided with limiting mechanisms on the side walls away from the protective block (8) to prevent the pipe from moving during docking. The rotating mechanism includes a rotating handle (4), a worm wheel (10), and a worm (11). The first rotating shaft (9) is fixedly connected to the worm wheel (10) in the part located inside the control rotating box (5). The worm (11) is rotatably connected to the side wall of the control rotating box (5) through a bearing. The worm (11) extends through the control rotating box (5) and the side wall of the worm (11) to the outside of the annular base (1). The rotating handle (4) is fixedly connected to one end of the worm (11) located outside the annular base (1). The worm (11) meshes with the worm wheel (10). The worm (11) is a single-headed worm, and the ratio of the number of heads of the worm (11) to the number of teeth of the worm wheel (10) is 1 to 360. The limiting mechanism includes an installation component, a disassembly component, and an adjustment component. The installation component includes an upper limit block (12), a lower limit block (13), a lower docking block (17), an insertion block (18), a first locking block (20), and an upper docking block (34). The lower limit block (13) is fixedly connected to the sidewalls of the first rotating rod (2) and the second rotating rod (3) away from the protective block (8). The lower limit block (13) is rotatably connected to the upper limit block (12) via a hinge (24). The upper limit block (12) has a semi-circular cross-section, and the lower limit block (13) has a semi-circular cross-section with a protrusion. The upper limit block (12) has a semi-circular cross-section with a protrusion. The outer side wall is fixedly connected to an upper docking block (34), the outer side wall of the lower limiting block (13) is fixedly connected to a lower docking block (17), the lower surface of the upper docking block (34) is fixedly connected to an insert block (18), the upper surface of the lower docking block (17) is provided with an insert block groove corresponding to the insert block (18), the inner side wall of the insert block groove is provided with a first locking block groove (21), the inner side wall of the first locking block groove (21) is slidably connected to a first locking block (20), the first locking block (20) and the inner side wall of the first locking block groove (21) are fixedly connected to a damping spring, and the side wall of the insert block (18) is provided with a groove corresponding to the first locking block (20). The disassembly assembly includes a first pull ring (19), a first limiting block (22), and a second rotating shaft (23). The outer side wall of the lower docking block (17) is provided with a first limiting block groove. The inner side wall of the first limiting block groove is slidably connected to the first limiting block (22). The side wall of the first limiting block (22) away from the lower docking block (17) is fixedly connected to the first pull ring (19). The side wall of the first limiting block (22) near the first locking block (20) is rotatably connected to the second rotating shaft (23) through a bearing. The second rotating shaft (23) extends through and into the first locking block groove (21) and is fixedly connected to the first locking block (20). The adjustment assembly includes a movable block (14), a pulley mounting block (15), a pulley (16), a second pull ring (27), a second locking block (28), a ratchet (30), a stop pawl (31), a second limiting block (32), and a pull rope (33). Each of the upper limit block (12) and lower limit block (13) has three movable holes (26) on its sidewalls. The inner sidewalls of all six movable holes (26) are slidably connected to movable blocks (14). The sidewalls of the six movable blocks (14) located within the upper limit block (12) are fixedly connected to pulley mounting blocks (15). The pulley mounting block (15) has a U-shaped cross-section. The inner sidewalls of the pulley mounting block (15) are rotatably connected to several pulleys (16) via pins. Each of the upper limit block (12) and lower limit block (13) has three ratchet cavities (25). The six ratchet cavities (25) are connected to the six… The moving holes (26) are connected to each other. The inner wall of the ratchet cavity (25) is rotatably connected to a ratchet (30) and a stop pawl (31) by a pin. The ratchet (30) and the stop pawl (31) are engaged in one direction. The moving block (14) is provided with a number of second locking blocks (28) on the side wall near the ratchet (30). The number of second locking blocks (28) are engaged with the ratchet (30). A pull rope (33) is fixedly connected to the upper surface of the stop pawl (31). The outer walls of the upper limit block (12) and the lower limit block (13) are each provided with three second limiting block slots. The inner walls of the three second limiting block slots are slidably connected with second limiting blocks (32). The pull rope (33) extends through and into the second limiting block slot and is fixedly connected to the second limiting block (32). The side wall of the second limiting block (32) located outside the second limiting block slot is fixedly connected with a second pull ring (27).

2. The pipe end docking auxiliary device according to claim 1, characterized in that, Both the first limiting block (22) and the second limiting block (32) are cuboids.

3. The auxiliary device for connecting pipe ends according to claim 2, characterized in that, The side wall of the movable block (14) is provided with a limiting protrusion (29), and the inner side wall of the movable hole (26) is provided with a groove corresponding to the limiting protrusion (29). The side wall of the limiting protrusion (29) is slidably connected to the inner side wall of the groove.

4. The pipe end docking auxiliary device according to claim 3, characterized in that, The lower limit block (13) has several rollers (7) on its lower surface, and the annular base (1) has a roller track (6) on its upper surface. The rollers (7) abut against the inner bottom wall of the roller track (6).

5. A docking method for the pipe end docking auxiliary device according to any one of claims 1-4, characterized in that, Includes the following steps: Step 1: First, rotate the handle (4). Rotating the handle (4) will drive the worm (11) to rotate. The worm (11) will drive the worm wheel (10) to rotate. The worm wheel (10) will drive the first rotating shaft (9) to rotate. The first rotating shaft (9) will drive the first rotating rod (2) to rotate. Adjust the angle between the first rotating rod (2) and the second rotating rod (3). Since the worm (11) is a single-headed worm, the ratio of the number of heads of the worm (11) to the number of teeth of the worm wheel (10) is 1:

360. For every rotation of the handle (4), the worm wheel (10) rotates one degree. Step 2: After adjusting the required angle, place the two pipes on the two lower limit blocks (13) respectively. Rotate the upper limit block (12) through the hinge (24) to align the insert (18) on the upper docking block (34) with the insert slot of the lower docking block (17). Through the cooperation of the first locking block (20) and the damping spring, the first locking block (20) is inserted into the groove of the insert (18), thus completing the docking installation of the upper limit block (12) and the lower limit block (13). Step 3: Push the lower moving block (14) upward to adjust the height of the two pipes in a uniform manner, and then push the other moving blocks (14) to fix the position of the two pipes, thus completing the radial rotation limit of the pipes; Step 4: After radially rotating and limiting the pipes, push the two pipes. Since the rotation of the pulley (16) is in the same direction as the pipe movement, the two pipes can be pushed to move towards each other to complete the docking operation. Step 5: After welding the two pipes together, pull the second pull ring (27). The second pull ring (27) will move the second limiting block (32) out of the second limiting block groove. Since the second limiting block (32) is a cuboid, rotate the second limiting block (32) 90 degrees so that the second limiting block (32) is stuck outside the second limiting block groove. At this time, the pull rope (33) will drive the stop pawl (31) to rotate upward and no longer engage with the ratchet (30) in one direction. Then move the moving block (14) to the side. Pull out the moving hole (26) to reset it, pull the first pull ring (19) to pull the first limiting block (22) out of the first limiting block groove and rotate it at a certain angle. Since the first limiting block (22) is a cuboid, the first limiting block (22) can be stuck outside the first limiting block groove. At this time, the second rotating shaft (23) drives the first locking block (20) to leave the groove of the second locking block (28). Then rotate the upper connecting block (34) to open it, and finally lift the connected water pipe out.

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