Anti-slip clamp for large-diameter pipeline high-drop welding butt joint

Abstract

The application provides a large-diameter pipeline high-drop welding butt joint anti-slip clamp, and relates to the technical field of pipeline welding construction equipment, which comprises a base, a bidirectional driving rod is rotationally arranged in the base, arc-shaped clamping pieces are threadedly sleeved at both ends of the bidirectional driving rod, two arc-shaped clamping pieces are synchronously close to or away from each other with the rotation of the bidirectional driving rod, a bottom supporting piece is movably inserted into the base, and the bottom supporting piece is located between the two arc-shaped clamping pieces. The bidirectional driving rod simultaneously drives the two arc-shaped clamping pieces to horizontally hold and the bottom supporting piece to vertically lift, so that the pipeline is synchronously held from three directions of the left side, the right side and the bottom of the pipeline, the pure mechanical linkage of clamping and supporting is realized, and the operation efficiency is greatly improved. Only one motor is needed to drive the bidirectional screw to rotate, so that the pipeline side clamping, the bottom lifting and the jet cleaning three functions can be synchronously completed, the structure is compact, and the energy consumption is low.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding construction equipment technology, specifically to an anti-slip clamp for butt welding of large-diameter pipelines with high drop. Background Technology

[0002] In the construction of pipeline projects such as oil, natural gas, water conservancy, and urban heating, the welding and alignment of large-diameter pipelines is one of the key processes. Especially in mountainous areas with large topographic relief or high drop sections that cross ravines, pipelines are laid along slopes, and the component of their own weight along the slope is huge. During the welding and alignment process, the pipeline is very prone to axial slippage or circumferential rotation, resulting in excessive misalignment of the pipe ends, which seriously affects the welding quality and project safety.

[0003] Currently, most pipe fitting clamps used on construction sites adopt a clamp-type structure, which uses manual screwing of bolts to tighten the clamps around the outer wall of the pipe. However, in actual use, the clamping action and anti-slip action of the existing clamps are separate. After tightening the pipe, an additional locking mechanism is usually required to prevent loosening, resulting in many operation steps and low efficiency.

[0004] This invention proposes an anti-slip clamp for welding butt joints of large-diameter pipes with high drops to solve the problem that existing clamps separate the clamping action from the anti-slip action in actual use, and that after clamping the pipe, an additional locking mechanism is usually required to prevent loosening, resulting in many operation steps and low efficiency. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems in the prior art where the clamping action and anti-slip action of existing clamps are separated in actual use, and after clamping the pipe, an additional locking mechanism is usually required to prevent loosening, resulting in many operation steps and low efficiency.

[0006] Based on the above technical concept, the technical solution adopted by this invention is as follows:

[0007] A non-slip clamp for welding butt joints of large-diameter pipes with high drops includes a base. A bidirectional drive rod is rotatably disposed inside the base. Both ends of the bidirectional drive rod are threaded with arc-shaped clamping parts. The two arc-shaped clamping parts move closer or further apart synchronously with the rotation of the bidirectional drive rod. A bottom support is movably inserted into the base. The bottom support is located between the two arc-shaped clamping parts and is used to support the bottom of the pipe. A contact plate is fixedly connected to the opposite side of each of the two arc-shaped clamping parts. When the contact plate moves with the arc-shaped clamping parts, it pushes the bottom support to move upward, so that the bottom support and the arc-shaped clamping parts synchronously grip the pipe.

[0008] Piston chambers are provided at the four corners of the base, and piston components are movably arranged in each piston chamber. Each piston component has a movable end, which slides in cooperation with a protrusion on the bidirectional drive rod. Air nozzles are fixedly inserted at the four corners of the top surface of the base. The air inlet of the air nozzle is connected to the inner cavity of the corresponding piston chamber, and the air outlet of the air nozzle is bent toward the bottom support.

[0009] Further defining the above technical solution, the base has several bolt holes for fixed connection with the ground or well wall, the interior of the base has a mounting groove for accommodating the bidirectional drive rod, the bidirectional drive rod is rotatably inserted into the mounting groove, and the top surface of the base has two symmetrical sliding grooves, the two sliding grooves extend parallel to each other along the axial direction of the bidirectional drive rod, and the lower end of the sliding grooves communicates with the mounting groove.

[0010] Further defining the above technical solution, the bidirectional drive rod includes a double-threaded rod and a motor. The double-threaded rod is rotatably inserted into the mounting groove. Both ends of the double-threaded rod are respectively machined with external threads in opposite directions. The motor is fixedly installed on the side wall of the base. The rotating shaft of the motor is fixedly connected to one end of the double-threaded rod. Cam disks are fixedly sleeved on both ends of the double-threaded rod. The outer circumferential surface contour of the cam disk is a non-circular curve, and the cam disk forms a protrusion.

[0011] Further defining the above technical solution, the arc-shaped clamping component includes a slider, the lower end of which is inserted into the mounting groove via a sliding groove and threaded onto a double-threaded rod, the side wall of the slider slidingly engages with the inner wall of the sliding groove, the upper end of the slider extends upward out of the sliding groove and is fixedly connected to a U-shaped frame, and an arc-shaped clamping plate is fixedly connected to the side of the U-shaped frame facing the bottom support component.

[0012] Further defining the above technical solution, the bottom support includes a support plate and two arc-shaped base plates. The two arc-shaped base plates are symmetrically fixedly connected to the upper surface of the support plate, and the arc openings of the two arc-shaped base plates face upwards to jointly support the bottom of the support channel. Two limiting rods are fixedly connected to the bottom surface of the support plate. Both limiting rods are vertically and movably inserted into the base. The limiting rods are used to restrict the support plate to move only in the vertical direction.

[0013] Further defining the above technical solution, one end of the contact plate is fixedly connected to the U-shaped frame, and the other end of the contact plate extends toward the support plate and is chamfered to form a first guide slope. The cross-sectional shape of the support plate is U-shaped, and the lower ends of both sides of the support plate are chamfered at the corresponding locations of the first guide slope of the contact plate to form a second guide slope.

[0014] Further defining the above technical solution, the inner end of the piston cavity is connected to the side wall of the mounting groove. The piston component includes a piston plate and a round rod. The piston plate is slidably disposed in the piston cavity, and the outer circumferential surface of the piston plate is sealed and fitted to the inner wall of the piston cavity. One end of the round rod extends into the piston cavity and is fixedly connected to the piston plate. The other end of the round rod extends into the mounting groove and slides in cooperation with the outer circumferential surface of the cam disk. The other end of the round rod constitutes a movable end. A return spring is connected between the piston plate and the inner end wall of the piston cavity. The return spring is used to provide an elastic force to return the piston plate to the direction closer to the cam disk.

[0015] Further defining the above technical solution, a plurality of first anti-slip rubber balls are fixedly connected to the inner arc surface of the arc-shaped clamp, and each first anti-slip rubber ball is distributed at intervals along the circumference and axial direction of the arc-shaped clamp. A plurality of second anti-slip rubber balls are fixedly connected to the inner arc surface of the arc-shaped base plate, and each second anti-slip rubber ball is distributed at intervals along the circumference and axial direction of the arc-shaped base plate. The first anti-slip rubber balls and the second anti-slip rubber balls are used to increase the friction between the ball and the outer wall of the pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] By simultaneously driving two arc-shaped clamping parts to horizontally clamp and the bottom support part to vertically lift the pipe through a bidirectional drive rod, the pipe is clamped synchronously from three directions: left, right and bottom. This achieves pure mechanical linkage between clamping and support, greatly improving operational efficiency.

[0018] With just one motor driving the bidirectional screw to rotate, it can simultaneously complete three functions: side clamping of the pipe, bottom lifting, and air jet cleaning. It has a compact structure and low energy consumption.

[0019] The piston is driven by the cam disk on the bidirectional drive rod to reciprocate within the piston chamber, generating a pulsed high-speed airflow that can effectively blow away dust, mud, and welding slag from the pipe surface and weld area, providing a clean surface for welding. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of an anti-slip clamp for high-drop welding of large-diameter pipes according to the present invention;

[0022] Figure 2This is a partial three-dimensional cross-sectional view of an anti-slip clamp for high-drop welding of large-diameter pipes according to the present invention.

[0023] Figure 3 This is a partial three-dimensional unfolded cross-sectional view of an anti-slip clamp for high-drop welding of large-diameter pipes according to the present invention.

[0024] The components include: 1. Base; 11. Piston chamber; 12. Bolt hole; 13. Mounting groove; 14. Slide groove; 2. Bidirectional drive rod; 21. Double threaded rod; 23. Motor; 24. Cam plate; 3. Arc-shaped clamping component; 31. Slider; 32. U-shaped frame; 33. Arc-shaped clamping plate; 34. First anti-slip rubber ball; 4. Bottom support component; 41. Support plate; 42. Arc-shaped bottom plate; 43. Limiting rod; 44. Second guide slope; 45. Second anti-slip rubber ball; 5. Contact plate; 51. First guide slope; 6. Piston component; 62. Piston plate; 63. Round rod; 64. Return spring; 7. Air nozzle. Detailed Implementation

[0025] The following is in conjunction with the appendix Figures 1-3 The present invention will be described in further detail below.

[0026] Please refer to the attached diagram in the instruction manual. Figure 1 , Figure 2 and Figure 3 An embodiment of the present invention provides an anti-slip clamp for welding butt joints of large-diameter pipes with high drop, comprising a base 1, a bidirectional drive rod 2 rotatably disposed inside the base 1, and arc-shaped clamping parts 3 threadedly sleeved at both ends of the bidirectional drive rod 2, the two arc-shaped clamping parts 3 moving closer or further away from each other synchronously with the rotation of the bidirectional drive rod 2.

[0027] The base 1 has several bolt holes 12 for fixed connection with the ground or well wall. The base 1 has an installation groove 13 for accommodating the bidirectional drive rod 2. The bidirectional drive rod 2 is rotatably inserted into the installation groove 13. The top surface of the base 1 has two sliding grooves 14 symmetrically opened. The two sliding grooves 14 extend parallel to the axis of the bidirectional drive rod 2, and the lower end of the sliding grooves 14 is connected to the installation groove 13.

[0028] The base 1 has several bolt holes 12, which are distributed around the base plate of the base 1 or at the four corners. Construction workers can firmly fix the base 1 to the ground or cable well wall by passing anchor bolts or expansion bolts through the bolt holes 12 and tightening them, so as to ensure that the base 1 will not be displaced due to the weight of the pipe or the welding stress during the pipe butt welding process.

[0029] The base 1 has an internal mounting groove 13, which is a cavity extending along the length of the base 1. The bidirectional drive rod 2 is rotatably inserted into the mounting groove 13. The mounting groove 13 provides the bidirectional drive rod 2 with rotational movement space and bearing mounting positions at both ends.

[0030] The top surface of the base 1 has two symmetrical sliding grooves 14. The two sliding grooves 14 extend parallel to the axis of the bidirectional drive rod 2. The lower end of the sliding groove 14 is connected to the mounting groove 13. The sliding groove 14 provides a channel and guide for the arc-shaped clamping member 3 to move along the axis of the bidirectional drive rod 2. At the same time, the side wall of the sliding groove 14 restricts the arc-shaped clamping member 3 to move only along the axis and not to rotate with the bidirectional drive rod 2.

[0031] The bidirectional drive rod 2 includes a double-threaded rod 21 and a motor 23. The double-threaded rod 21 is rotatably inserted into the mounting groove 13. The two ends of the double-threaded rod 21 are respectively machined with external threads in opposite directions. The motor 23 is fixedly installed on the side wall of the base 1. The rotating shaft of the motor 23 is fixedly connected to one end of the double-threaded rod 21. Cam disks 24 are fixedly sleeved on both ends of the double-threaded rod 21. The outer peripheral surface contour of the cam disk 24 is a non-circular curve, and the cam disk 24 forms a protrusion.

[0032] The bidirectional drive rod 2 consists of a double-threaded rod 21 and a motor 23. The double-threaded rod 21 is rotatably inserted into the mounting groove 13. The two ends of the double-threaded rod 21 are respectively machined with external threads in opposite directions, that is, one end is a left-hand thread and the other end is a right-hand thread. When the double-threaded rod 21 rotates, the arc-shaped clamping parts 3 screwed at both ends will move axially in opposite directions, thereby achieving synchronous approach or synchronous distance.

[0033] The motor 23 is fixedly installed on the side wall of the base 1. The rotating shaft of the motor 23 is fixedly connected to one end of the double threaded rod 21 through a coupling. When the motor 23 is powered on, it drives the double threaded rod 21 to rotate, providing driving force for the entire fixture. Cam disks 24 are fixedly sleeved on both ends of the double threaded rod 21. The cam disks 24 rotate synchronously with the double threaded rod 21. The outer circumferential contour of the cam disk 24 is a non-circular curve, such as an eccentric circle or a wave shape with multiple protrusions. The cam disk 24 constitutes the protrusion on the bidirectional drive rod 2. When the cam disk 24 rotates, the undulating contour of its outer circumferential surface periodically pushes the movable end of the piston 6, driving the piston 6 to produce reciprocating motion.

[0034] A bottom support 4 is movably inserted into the base 1. The bottom support 4 is located between two arc-shaped clamps 3. The bottom support 4 is used to support the bottom of the pipe. A contact plate 5 is fixedly connected to the opposite side of each of the two arc-shaped clamps 3. When the contact plate 5 moves with the arc-shaped clamps 3, it pushes the bottom support 4 to move upward so that the bottom support 4 and the arc-shaped clamps 3 can hug the pipe synchronously.

[0035] The arc-shaped clamping component 3 includes a slider 31. The lower end of the slider 31 is inserted into the mounting groove 13 through the slide groove 14 and threaded onto the double threaded rod 21. The side wall of the slider 31 slides in cooperation with the inner wall of the slide groove 14. The upper end of the slider 31 extends upward out of the slide groove 14 and is fixedly connected to a U-shaped frame 32. An arc-shaped clamping plate 33 is fixedly connected to the side of the U-shaped frame 32 facing the bottom support component 4.

[0036] The arc-shaped clamping component 3 consists of a slider 31, a U-shaped frame 32, and an arc-shaped clamping plate 33. The lower end of the slider 31 is inserted into the mounting groove 13 through the sliding groove 14. The part of the slider 31 inserted into the mounting groove 13 has a threaded hole and is threaded onto the double threaded rod 21. The side wall of the slider 31 slides in cooperation with the inner wall of the sliding groove 14. The sliding groove 14 restricts the slider 31 to move only along the axial direction of the double threaded rod 21 and prevents it from rotating with the double threaded rod 21.

[0037] When the double threaded rod 21 rotates, the slider 31 moves axially along the slide groove 14 under the action of threaded transmission. The upper end of the slider 31 extends upward out of the slide groove 14 and is fixedly connected to a U-shaped frame 32. The U-shaped frame 32 is a U-shaped structure with its opening facing the direction of the pipe. Both ends of the U-shaped frame 32 extend towards one side of the bottom support member 4. An arc-shaped clamp 33 is fixedly connected to the side of the U-shaped frame 32 facing the bottom support member 4. The inner arc surface shape of the arc-shaped clamp 33 matches the curvature of the outer wall of the pipe and is used to fit and hug the side wall of the pipe.

[0038] The bottom support 4 includes a support plate 41 and two arc-shaped base plates 42. The two arc-shaped base plates 42 are symmetrically fixedly connected to the upper surface of the support plate 41. The arc openings of the two arc-shaped base plates 42 face upwards and are used to jointly support the bottom of the support channel. Two limiting rods 43 are fixedly connected to the bottom surface of the support plate 41. Both limiting rods 43 are vertically and movably inserted into the base 1. The limiting rods 43 are used to restrict the support plate 41 to move only in the vertical direction.

[0039] The bottom support 4 consists of a support plate 41 and two arc-shaped base plates 42. The two arc-shaped base plates 42 are symmetrically fixed to the upper surface of the support plate 41. The arc openings of the two arc-shaped base plates 42 face upwards. The inner arc shape of the arc-shaped base plates 42 matches the curvature of the outer wall of the bottom of the pipe. The two arc-shaped base plates 42 are arranged at intervals along the axial direction of the pipe to jointly support the bottom of the pipe and provide stable vertical support for the pipe.

[0040] Two limiting rods 43 are fixedly connected to the bottom surface of the support plate 41. Both limiting rods 43 are vertically and movably inserted into the guide holes opened on the base 1. The axis of the limiting rods 43 is perpendicular to the top surface of the base 1. The cooperation between the limiting rods 43 and the guide holes restricts the support plate 41 to move up and down in the vertical direction only, and prevents horizontal deviation or tilting. This ensures that the bottom support 4 always maintains a horizontal posture when lifting the pipe, and achieves precise centering in cooperation with the arc-shaped clamping part 3.

[0041] One end of the contact plate 5 is fixedly connected to the U-shaped frame 32, and the other end of the contact plate 5 extends toward the support plate 41 and is chamfered to form a first guide slope 51. The cross-sectional shape of the support plate 41 is U-shaped, and the lower ends of both sides of the support plate 41 are chamfered at the corresponding locations of the first guide slope 51 of the contact plate 5 to form a second guide slope 44.

[0042] When the two arc-shaped clamping parts 3 approach each other, the first guide slope 51 of the contact plate 5 slides and fits against the second guide slope 44 of the support plate 41, pushing the support plate 41 to move upward in the vertical direction.

[0043] One end of the contact plate 5 is fixedly connected to the U-shaped frame 32 and moves along the axial direction of the double threaded rod 21 together with the U-shaped frame 32 and the slider 31. The other end of the contact plate 5 extends horizontally toward the support plate 41, and the lower edge of the extended end is chamfered to form a first guide slope 51. The first guide slope 51 is inclined in a direction that gradually slopes upward from the end closer to the U-shaped frame 32 to the end farther away from the U-shaped frame 32.

[0044] The cross-sectional shape of the support plate 41 is U-shaped, that is, the two sides of the support plate 41 extend downward. The lower ends of the two sides of the support plate 41 are chamfered at the corresponding positions of the first guide slope 51 of the contact plate 5 to form the second guide slope 44. The inclination direction of the second guide slope 44 matches that of the first guide slope 51.

[0045] When the motor 23 drives the double threaded rod 21 to rotate and the two arc-shaped clamping parts 3 move closer to each other synchronously, the contact plate 5 moves towards the support plate 41 along with the arc-shaped clamping parts 3. The first guide slope 51 of the contact plate 5 gradually contacts the second guide slope 44 of the support plate 41 and produces a sliding fit. Due to the inclined cooperation of the first guide slope 51 and the second guide slope 44, the horizontal movement of the contact plate 5 is converted into an upward pushing force on the support plate 41, which pushes the support plate 41 to overcome its own weight and the weight of the pipe and move upward in the vertical direction, so that the arc-shaped bottom plate 42 is tightly attached to the bottom of the pipe. This realizes the mechanical linkage between the horizontal clamping movement of the arc-shaped clamping parts 3 and the vertical lifting movement of the bottom support parts 4. The movements in the two directions are completed synchronously by the same driving source.

[0046] Piston chambers 11 are provided at the four corners inside the base 1. A piston component 6 is movably arranged in each piston chamber 11. The piston component 6 has a movable end, which slides in cooperation with the protrusion on the bidirectional drive rod 2. Air nozzles 7 are fixedly inserted at the four corners of the top surface of the base 1. The air inlet end of the air nozzle 7 is connected to the inner cavity of the corresponding piston chamber 11, and the air outlet end of the air nozzle 7 is bent toward the bottom support 4.

[0047] When the bidirectional drive rod 2 rotates, the protrusion drives the piston 6 to reciprocate within the piston chamber 11. The gas in the piston chamber 11 is ejected outward through the jet nozzle 7 to blow away debris from the pipe surface and weld area.

[0048] The inner end of the piston chamber 11 is connected to the side wall of the mounting groove 13. The piston component 6 includes a piston plate 62 and a round rod 63. The piston plate 62 is slidably disposed in the piston chamber 11. The outer peripheral surface of the piston plate 62 is sealed and fitted to the inner wall of the piston chamber 11. One end of the round rod 63 extends into the piston chamber 11 and is fixedly connected to the piston plate 62. The other end of the round rod 63 extends into the mounting groove 13 and is slidably engaged with the outer peripheral surface of the cam disk 24. The other end of the round rod 63 forms a movable end. A return spring 64 is connected between the piston plate 62 and the inner end wall of the piston chamber 11. The return spring 64 is used to provide an elastic force to return the piston plate 62 to the direction closer to the cam disk 24.

[0049] The inner end of the piston chamber 11 is connected to the side wall of the mounting groove 13, so that the movable end of the piston component 6 can extend from the piston chamber 11 into the mounting groove 13 and contact the cam disk 24. The piston component 6 is composed of a piston plate 62 and a round rod 63. The piston plate 62 is slidably disposed in the piston chamber 11. The outer peripheral surface of the piston plate 62 and the inner wall of the piston chamber 11 are sealed together by a sealing ring or precision fit to prevent gas from leaking from the gap between the piston plate 62 and the piston chamber 11.

[0050] One end of the round rod 63 extends into the piston cavity 11 and is fixedly connected to the center of the piston plate 62. The other end of the round rod 63 extends into the mounting groove 13 and slides in contact with the outer circumferential surface of the cam disk 24. The end of the round rod 63 extending into the mounting groove 13 constitutes the movable end of the piston component 6. A return spring 64 is connected between the piston plate 62 and the inner end wall of the piston cavity 11. The return spring 64 is stretched when the piston plate 62 is pushed into the piston cavity 11 by the cam disk 24. When the cam disk 24 rotates with the double threaded rod 21... During operation, the raised contour on the outer circumference of the cam disk 24 pushes the movable end of the round rod 63, causing the round rod 63 and piston plate 62 to move into the piston chamber 11, compressing the gas inside the piston chamber 11. When the cam disk 24 rotates to the point where the concave contour section corresponds to the round rod 63, the elastic restoring force of the return spring 64 pulls the piston plate 62 and round rod 63 back towards the cam disk 24, creating a negative pressure inside the piston chamber 11. External air is then drawn into the piston chamber 11 through the jet nozzle 7, preparing for the next compression and jet. Each rotation of the cam disk 24 completes at least one full compression and reset cycle for the piston component 6.

[0051] A number of first anti-slip rubber balls 34 are fixedly connected to the inner arc surface of the arc-shaped clamping plate 33. The first anti-slip rubber balls 34 are distributed at intervals along the circumference and axial direction of the arc-shaped clamping plate 33. A number of second anti-slip rubber balls 45 are fixedly connected to the inner arc surface of the arc-shaped base plate 42. The second anti-slip rubber balls 45 are distributed at intervals along the circumference and axial direction of the arc-shaped base plate 42. The first anti-slip rubber balls 34 and the second anti-slip rubber balls 45 are used to increase the friction between the first anti-slip rubber balls 34 and the outer wall of the pipe and prevent the pipe from slipping during the welding process.

[0052] When the bidirectional drive rod 2 rotates, the two arc-shaped clamping parts 3 move closer to each other and hug the side wall of the pipe. At the same time, the contact plate 5 pushes the bottom support 4 to move upward and lift the bottom of the pipe. The arc-shaped clamping parts 3 and the bottom support 4 hug the pipe from the side and bottom of the pipe simultaneously, realizing the linkage of clamping and support.

[0053] The volume of the piston chamber 11 and the outlet diameter of the jet nozzle 7 are configured such that when the convex profile of the cam disk 24 pushes the piston 6, the gas in the piston chamber 11 is rapidly compressed and ejected at high speed through the jet nozzle 7, forming a pulsed airflow to effectively blow away welding slag and dust from the pipe surface and weld area.

[0054] Several first anti-slip rubber balls 34 are fixedly connected to the inner arc surface of the arc-shaped clamp 33. The first anti-slip rubber balls 34 are arranged in an array at intervals along the circumference and axial direction of the arc-shaped clamp 33. The first anti-slip rubber balls 34 are made of wear-resistant rubber material with a high coefficient of friction. When the arc-shaped clamp 33 clamps the pipe side wall, the first anti-slip rubber balls 34 are in direct contact with the outer wall of the pipe. Under the action of clamping pressure, they undergo elastic deformation and form a large static friction force with the outer wall of the pipe.

[0055] Several second anti-slip rubber balls 45 are fixedly connected to the inner arc surface of the arc-shaped base plate 42. These second anti-slip rubber balls 45 are arranged in an array along the circumference and axial direction of the arc-shaped base plate 42. When the bottom support 4 lifts the bottom of the pipe, the second anti-slip rubber balls 45 directly contact the outer wall of the pipe bottom, generating significant static friction. The first anti-slip rubber ball 34 and the second anti-slip rubber ball 45 work together to increase the friction between the pipe and the outer wall from multiple directions, effectively preventing axial slippage or circumferential rotation of the pipe during welding due to its own weight, welding stress, or external vibration, ensuring alignment accuracy and welding quality.

[0056] When the bidirectional drive rod 2 rotates, the two arc-shaped clamping parts 3 move closer to each other synchronously under the drive of the double threaded rod 21. The arc-shaped clamping plate 33 hugs the side wall of the pipe from the left and right sides of the pipe. At the same time, the first guide slope 51 of the contact plate 5 pushes the second guide slope 44 of the support plate 41, pushing the bottom support 4 to move upward in the vertical direction. The arc-shaped bottom plate 42 lifts the pipe from the bottom of the pipe. The arc-shaped clamping parts 3 and the bottom support 4 hug the pipe synchronously from the left, right and bottom directions of the pipe, forming a three-point stable clamping structure, realizing the pure mechanical linkage of horizontal clamping and vertical support.

[0057] The volume of piston chamber 11 and the outlet diameter of nozzle 7 are specially configured: piston chamber 11 has a relatively large volume, and the outlet of nozzle 7 has a relatively small diameter. When the convex profile of cam disk 24 pushes piston 6 to move rapidly into piston chamber 11, the gas in piston chamber 11 is rapidly compressed. Due to the small outlet diameter of nozzle 7, the gas can only be ejected from nozzle 7 at high speed, forming a pulsed high-speed airflow. This pulsed airflow has high dynamic pressure, which can effectively blow away welding slag, dust and debris attached to the pipe surface and weld area, providing clean surface conditions for welding operations.

[0058] Working principle: When using this anti-slip clamp for high-drop welding of large-diameter pipes, the base 1 serves as the supporting foundation for the entire anti-slip clamp and is placed on the ground at the pipe jointing position or fixed to the well wall by bolts. The bidirectional drive rod 2 is rotatably set inside the base 1 and can rotate around its own axis. The two arc-shaped clamping parts 3 are threaded onto the two ends of the bidirectional drive rod 2 respectively. When the bidirectional drive rod 2 rotates, since the threads at both ends of the bidirectional drive rod 2 rotate in opposite directions, the two arc-shaped clamping parts 3 move closer or further away from each other synchronously along the axial direction of the bidirectional drive rod 2 under the action of thread transmission, thereby achieving the clamping or loosening of the pipe sidewall.

[0059] A bottom support 4 is movably inserted into the base 1. The bottom support 4 is located between two arc-shaped clamping parts 3 and can move up and down in the vertical direction. The upper surface of the bottom support 4 is used to support the bottom of the pipe and provide vertical support for the pipe. Each side of the two arc-shaped clamping parts 3 is fixedly connected to an abutment plate 5. The abutment plate 5 moves together with the arc-shaped clamping parts 3. When the two arc-shaped clamping parts 3 approach each other and hug the side wall of the pipe, the end of the abutment plate 5 contacts the lower end of the bottom support 4 and generates a pushing action, pushing the bottom support 4 to move upward in the vertical direction, so that the upper surface of the bottom support 4 is close to the bottom of the pipe. Thus, the two arc-shaped clamping parts 3 hug the pipe from the left and right sides, and the bottom support 4 lifts the pipe from the bottom. The pipe is hugged simultaneously in three directions, realizing the mechanical linkage of clamping and support.

[0060] Piston chambers 11 are provided at the four corners of the base 1. A piston 6 is movably disposed in each piston chamber 11. The piston 6 has a movable end, which slides in engagement with a protrusion on the bidirectional drive rod 2. Air nozzles 7 are fixedly inserted into the four corners of the top surface of the base 1. The air inlet of the air nozzle 7 communicates with the inner cavity of the corresponding piston chamber 11, and the air outlet of the air nozzle 7 is bent towards the bottom support 4. When the bidirectional drive rod 2 rotates to drive the arc-shaped clamping member 3 to grip the pipe, the protrusion on the bidirectional drive rod 2 rotates together with the bidirectional drive rod 2. The outer peripheral surface of the protrusion undulates and periodically pushes the movable end of the piston 6, causing the piston 6 to reciprocate within the piston chamber 11. When the piston 6 moves into the piston chamber 11, the gas inside the piston chamber 11 is compressed. The high-pressure gas enters the air inlet of the air nozzle 7 and is ejected at high speed from the outlet. The airflow blows towards the pipe surface and weld area above the bottom support 4, removing dust, mud, and welding slag from the pipe surface before welding and during welding. This achieves synchronous linkage between the clamping and holding action and the air cleaning action.

[0061] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention, enabling those skilled in the art to understand and apply the invention. However, it should not be construed that the specific implementation of the invention is limited to these descriptions.

Claims

1. A non-slip clamp for butt welding of large-diameter pipes with high drop, comprising a base (1), characterized in that, A bidirectional drive rod (2) is rotatably installed inside the base (1). Both ends of the bidirectional drive rod (2) are threaded with arc-shaped clamping parts (3). The two arc-shaped clamping parts (3) move closer or further away from each other synchronously with the rotation of the bidirectional drive rod (2). A bottom support (4) is movably inserted into the base (1). The bottom support (4) is located between the two arc-shaped clamping parts (3). The bottom support (4) is used to support the bottom of the pipe. A contact plate (5) is fixedly connected to the opposite side of the two arc-shaped clamping parts (3). When the contact plate (5) moves with the arc-shaped clamping parts (3), it pushes the bottom support (4) to move upward so that the bottom support (4) and the arc-shaped clamping parts (3) hug the pipe synchronously. Piston chambers (11) are provided at the four corners of the base (1). A piston component (6) is movably arranged in each piston chamber (11). The piston component (6) has a movable end, which is slidably engaged with the protrusion on the bidirectional drive rod (2). Air nozzles (7) are fixedly inserted at the four corners of the top surface of the base (1). The air inlet of the air nozzle (7) is connected to the inner cavity of the corresponding piston chamber (11). The air outlet of the air nozzle (7) is bent toward the bottom support component (4).

2. The anti-slip clamp for high-drop welding of large-diameter pipes according to claim 1, characterized in that, The base (1) has several bolt holes (12) for fixed connection with the ground or well wall. The base (1) has an installation groove (13) for accommodating the bidirectional drive rod (2). The bidirectional drive rod (2) is rotatably inserted into the installation groove (13). The top surface of the base (1) has two sliding grooves (14) symmetrically opened. The two sliding grooves (14) extend parallel to the axial direction of the bidirectional drive rod (2), and the lower end of the sliding grooves (14) is connected to the installation groove (13).

3. The anti-slip clamp for high-drop welding of large-diameter pipes according to claim 2, characterized in that, The bidirectional drive rod (2) includes a double-threaded rod (21) and a motor (23). The double-threaded rod (21) is rotatably inserted into the mounting groove (13). The two ends of the double-threaded rod (21) are respectively machined with external threads in opposite directions. The motor (23) is fixedly installed on the side wall of the base (1). The rotating shaft of the motor (23) is fixedly connected to one end of the double-threaded rod (21). Both ends of the double-threaded rod (21) are fixedly fitted with cam disks (24). The outer circumferential contour of the cam disk (24) is a non-circular curve. The cam disk (24) forms a protrusion.

4. The anti-slip clamp for high-drop welding of large-diameter pipes according to claim 3, characterized in that, The arc-shaped clamping member (3) includes a slider (31). The lower end of the slider (31) is inserted into the mounting groove (13) through the slide groove (14) and threaded onto the double threaded rod (21). The side wall of the slider (31) slides in cooperation with the inner wall of the slide groove (14). The upper end of the slider (31) extends upward out of the slide groove (14) and is fixedly connected to a U-shaped frame (32). An arc-shaped clamping plate (33) is fixedly connected to the side of the U-shaped frame (32) facing the bottom support member (4).

5. The anti-slip clamp for high-drop welding of large-diameter pipes according to claim 4, characterized in that, The bottom support (4) includes a support plate (41) and two arc-shaped base plates (42). The two arc-shaped base plates (42) are symmetrically fixedly connected to the upper surface of the support plate (41). The arc openings of the two arc-shaped base plates (42) face upwards and are used to jointly support the bottom of the support channel. The bottom surface of the support plate (41) is fixedly connected to two limiting rods (43). The two limiting rods (43) are vertically and movably inserted into the base (1). The limiting rods (43) are used to restrict the support plate (41) to move only in the vertical direction.

6. The anti-slip clamp for high-drop welding of large-diameter pipes according to claim 5, characterized in that, One end of the contact plate (5) is fixedly connected to the U-shaped frame (32), and the other end of the contact plate (5) extends toward the support plate (41) and is chamfered to form a first guide slope (51). The cross-sectional shape of the support plate (41) is U-shaped. The lower ends of both sides of the support plate (41) are chamfered at the corresponding positions of the first guide slope (51) of the contact plate (5) to form a second guide slope (44).

7. The anti-slip clamp for high-drop welding of large-diameter pipes according to claim 3, characterized in that, The inner end of the piston cavity (11) is connected to the side wall of the mounting groove (13). The piston component (6) includes a piston plate (62) and a round rod (63). The piston plate (62) is slidably disposed in the piston cavity (11). The outer circumferential surface of the piston plate (62) is sealed and fitted with the inner wall of the piston cavity (11). One end of the round rod (63) extends into the piston cavity (11) and is fixedly connected to the piston plate (62). The other end of the round rod (63) extends into the mounting groove (13) and slides in cooperation with the outer circumferential surface of the cam disk (24). The other end of the round rod (63) forms a movable end. A return spring (64) is connected between the piston plate (62) and the inner end wall of the piston cavity (11). The return spring (64) is used to provide an elastic force to return the piston plate (62) to the direction closer to the cam disk (24).

8. The anti-slip clamp for high-drop welding of large-diameter pipes according to claim 5, characterized in that, The inner arc surface of the arc-shaped clamp (33) is fixedly connected with a number of first anti-slip rubber balls (34), and each first anti-slip rubber ball (34) is distributed at intervals along the circumference and axial direction of the arc-shaped clamp (33). The inner arc surface of the arc-shaped base plate (42) is fixedly connected with a number of second anti-slip rubber balls (45), and each second anti-slip rubber ball (45) is distributed at intervals along the circumference and axial direction of the arc-shaped base plate (42). The first anti-slip rubber balls (34) and the second anti-slip rubber balls (45) are used to increase the friction between the first and second anti-slip rubber balls and the outer wall of the pipe.

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