Clamp and pipeline laying auxiliary device

Abstract

The invention relates to the technical field of heat supply pipeline laying, and discloses a clamp and a pipeline laying auxiliary device.The clamp comprises a clamping sleeve, the clamping sleeve is provided with a pipe penetrating cavity and a plurality of lateral through cavities, the pipe penetrating cavity extends in the axial direction of the clamping sleeve and penetrates through at least one end of the clamping sleeve, and the lateral through cavities are arranged around the circumferential direction of the pipe penetrating cavity at intervals; the clamping sleeve penetrates through the side wall of the clamping sleeve; one end of each clamping arm is rotatably connected into the corresponding lateral through cavity, the rotating central axis of each clamping arm is perpendicular to the central axis of the pipe penetrating cavity, and a protective pad is arranged on the side, facing the central axis of the pipe penetrating cavity, of each clamping arm; the driving structure is connected with the clamping sleeve and used for driving the clamping arms to rotate. The clamping force can be ensured to be uniformly distributed on the circumference of the pipeline, and the pipeline is prevented from sliding or shaking due to unilateral stress; and each clamping arm is provided with a protective pad, so that rigid extrusion on the surface of the pipeline anti-corrosion layer can be avoided, and the pipeline anti-corrosion layer is prevented from being crushed or scraped.

Description

Technical Field

[0001] This invention relates to the field of heating pipeline laying technology, specifically to a clamp and pipeline laying auxiliary device. Background Technology

[0002] In centralized heating pipeline laying projects, hoisting equipment is often used to transport large-diameter pipes to designated locations for installation and connection. As core construction equipment, the performance of pipeline hoisting devices directly affects construction safety and efficiency. Currently, the pipeline hoisting devices commonly used in the industry mainly rely on rigid mechanical clamping structures. However, existing technical solutions have revealed some shortcomings in construction practice, primarily in the following aspects.

[0003] Firstly, regarding the adjustment and adaptability of clamping force, existing devices generally lack the ability to control clamping force quickly and accurately. Clamping force adjustment relies primarily on the operator's experience, requiring repeated trials to determine a clamping force that both avoids damaging the pipe's surface corrosion protection layer and provides sufficient anti-slip friction. This process is not only time-consuming for each individual adjustment, but also necessitates repeated adjustments when frequently changing pipes of different diameters, wall thicknesses, or materials at the construction site, severely impacting construction efficiency. Furthermore, the reliability of clamping depends excessively on the operator's skills and experience, introducing significant human uncertainty.

[0004] Secondly, regarding ease of operation and safety, traditional devices mostly employ bolt-fastening clamping structures. This type of structure requires the use of tools such as wrenches to tighten multiple fixing bolts one by one, making the operation cumbersome. This is extremely inconvenient for high-altitude operations or confined construction sites.

[0005] Furthermore, existing locking and unlocking mechanisms have inherent flaws in terms of the reliability and durability of the locked state. Locking operations typically require the gradual handling of multiple independent fixed components, making the process complex; unlocking requires completely unloading all clamping forces to release the clamp, making the operation cumbersome. After long-term use, wear on the mechanical locking components can lead to a decrease in self-locking capability, and the clamping force weakens under the weight of the pipeline and dynamic loads, making reliability difficult to guarantee.

[0006] Finally, regarding pipeline protection, the existing clamping components often have unreasonable contact designs with the pipeline surface, mostly using point contact or small-area line contact, which leads to local stress concentration, making it very easy to damage or crush the anti-corrosion insulation layer of the pipeline outer wall, affecting the service life of the pipeline and potentially causing subsequent corrosion problems. Summary of the Invention

[0007] In view of the problem that pipe clamps in the prior art are prone to damaging the anti-corrosion layer of pipes, the present invention provides a clamp and pipe laying auxiliary device that can avoid damaging the anti-corrosion layer of pipes when clamping them.

[0008] In a first aspect, the present invention provides a clamp comprising: a clamping sleeve having a through-pipe cavity and a plurality of lateral through-cavities, the through-pipe cavity extending axially along the clamping sleeve and penetrating at least one end of the clamping sleeve, the lateral through-cavities being circumferentially spaced around the through-pipe cavity and penetrating the sidewall of the clamping sleeve; a plurality of clamping arms corresponding one-to-one with the lateral through-cavities, one end of each clamping arm being rotatably connected to the corresponding lateral through-cavity, and the rotation center axis of the clamping arm being perpendicular to the central axis of the through-pipe cavity, a protective pad being provided on the side of the clamping arm facing the central axis of the through-pipe cavity, the protective pad being used to contact the outer peripheral surface of the pipe to be transported; and a driving structure connected to the clamping sleeve for driving each clamping arm to rotate, so that the free end of the clamping arm moves toward or away from the central axis of the through-pipe cavity.

[0009] The clamp provided by this invention, when in use, first aligns the end of the pipe to be transported with the opening of the pipe cavity, and inserts one end of the pipe into the cavity. Then, the drive structure is operated, which synchronously drives all clamping arms to rotate around their respective axes, causing the free ends of each clamping arm to approach the central axis of the pipe cavity. The protective pads on each clamping arm evenly contact and press against the outer circumference of the pipe from all sides, thus clamping the pipe. Once the pipe is clamped, it can be lifted. When it is necessary to release the pipe, the drive structure is operated in reverse, and the free ends of the clamping arms swing outwards, allowing the pipe to be removed.

[0010] The clamp provided by this invention features multiple clamping arms arranged circumferentially around the pipe cavity and driven synchronously by the same drive structure. This ensures that the clamping force is evenly distributed along the pipe circumference, forming a stable and reliable full-circumferential clamping. Furthermore, a protective pad located on the inner side of the clamping arms makes flexible contact with the pipe surface during clamping, effectively dispersing and buffering the radial clamping force. This uniformly distributed and flexible clamping method avoids indentation, scratching, or abrasion of the pipe's anti-corrosion layer, and significantly reduces the risk of slippage, rotation, or accidental loosening of the pipe during lifting. Even under dynamic handling conditions, it maintains continuous stability in the clamping state. In terms of ease of operation, the movement of all clamping arms can be synchronously controlled by a single drive structure, enabling rapid completion of the clamping action. Compared to the cumbersome process of manually tightening bolts one by one using traditional clamps, this not only significantly reduces the labor intensity of operators but also significantly shortens the preparation and disassembly time for pipe lifting, thereby improving construction efficiency.

[0011] The protective pad can be one of the following: polyurethane pad, silicone pad, rubber pad, etc.

[0012] Preferably, the protective pad is a rubber pad, and multiple protective pads are provided on the same clamping arm, and are spaced apart along a direction perpendicular to the rotation axis of the clamping arm.

[0013] Rubber pads possess good elasticity and flexibility, enabling them to form a flexible contact with the pipeline, avoiding indentations or scratches on the pipeline's outer anti-corrosion layer. They can also adapt to the size and surface shape of the pipeline, adhering tightly to the pipeline surface. Simultaneously, the rubber pads have a high coefficient of friction, generating significant static friction with the pipeline surface, significantly reducing the risk of slippage or rotation of the pipeline during hoisting. Based on the aforementioned properties of the rubber pads, multiple independent rubber pads are spaced apart along the length of the same clamping arm. Firstly, this ensures that the clamping force is evenly distributed along the pipeline axis, avoiding concentrated pressure and localized compression of the pipeline, and reducing the stress and fatigue of individual rubber pads, thus improving the overall durability and reliability of the device. Secondly, each rubber pad can deform independently, adaptively conforming to the pipeline surface, ensuring close contact with the pipeline along the entire length of the clamping arm, improving the anti-slip reliability and clamping stability of the clamping arm.

[0014] Preferably, the clamping arm is rotatably connected to the lateral passage cavity via a rotating shaft, and a torsion spring is sleeved on the outside of the rotating shaft. One end of the torsion spring is connected to the clamping arm or the rotating shaft, and the other end is connected to the clamping sleeve. The torsion spring is configured to provide a reset torque to the clamping arm, causing the free end of the clamping arm to move away from the central axis of the through-tube cavity.

[0015] When the drive mechanism clamps the pipe, it overcomes the return torque of the torsion spring, pushing the clamping arm to rotate inward around the axis until the protective pad presses against the pipe. When it is necessary to release the pipe, the drive mechanism releases the constraint on the clamping arm, and the elastic potential energy stored in the torsion spring is immediately released, driving the clamping arm to rotate outward quickly and automatically around the axis, causing the protective pad to detach from the pipe surface. There is no need for manual prying of the clamping arm; the release action is automatically completed by the torsion spring, resulting in a faster response and significantly reducing the cycle time for preparing the clamp for the next clamping cycle. This is especially suitable for construction scenarios requiring frequent pipe loading and unloading.

[0016] Preferably, the driving structure includes a driving sleeve, which is axially slidably sleeved on the outer periphery of the clamping sleeve.

[0017] When pipe clamping is required, the axial sliding drive sleeve contacts the clamping arms, causing all clamping arms to rotate synchronously until the protective pad presses firmly against the pipe. When pipe removal is required, the reverse sliding drive sleeve disengages from the clamping arms. The clamping arms then rotate outwards under the tension of the torsion spring, allowing the pipe to be removed. All clamping and releasing actions can be completed with a single-handed push and pull of the drive sleeve, making operation simple and efficient. Furthermore, the nested arrangement of the drive sleeve and clamping sleeves results in a highly compact and integrated structure, improving the clamp's maneuverability and interference resistance in complex construction sites.

[0018] Preferably, the clamping arm is provided with a plurality of rotatable rollers, which are spaced apart along a direction perpendicular to the rotation axis of the clamping arm, and each roller has at least a portion protruding from the side of the clamping arm opposite to the central axis of the tube cavity.

[0019] By arranging multiple freely rotatable rollers at intervals along the length of the gripping arm, with the rollers protruding from the gripping arm surface to form rolling contact with the inner wall of the drive sleeve, the friction force on the drive sleeve is transformed from sliding friction to rolling friction. This significantly reduces the operating resistance of the drive sleeve, resulting in a smoother and more effortless push-pull feel. Furthermore, it avoids static friction between the drive sleeve and the gripping arm, thus preventing wear on both the gripping arm and the drive sleeve, and extending the overall service life and gripping stability of the fixture.

[0020] Preferably, the device further includes a locking sleeve, which is rotatably fitted onto the outer periphery of the clamping sleeve. The locking sleeve has a locked position and an unlocked position. The locking sleeve is provided with a first engaging structure, and the driving sleeve is provided with a second engaging structure. When the locking sleeve rotates to the locked position, the first engaging structure engages with the second engaging structure to prevent the driving sleeve from sliding axially. When the locking sleeve rotates to the unlocked position, the first engaging structure disengages from the second engaging structure to allow the driving sleeve to move axially.

[0021] After the drive sleeve slides axially to clamp the pipe with the clamping arm, rotating the locking sleeve fitted around the outer circumference of the clamping sleeve to the locked position engages the first locking structure with the second locking structure on the drive sleeve, thus restricting the axial displacement of the drive sleeve. When it is necessary to slide the drive sleeve to release the pipe, first rotate the locking sleeve in the opposite direction to the unlocked position. At this time, the first locking structure disengages from the second locking structure, and the drive sleeve can slide freely. The locking sleeve can lock the drive sleeve, thereby preventing the drive sleeve from sliding under vibration, impact, or accidental contact, ensuring a stable clamping state for the pipe. The drive sleeve can be securely locked or released within seconds by rotation alone. Compared with the traditional bolt tightening method, the operation efficiency is higher, and the auxiliary time in pipe hoisting operations can be significantly reduced.

[0022] The first snap-fit ​​structure can be one of a protrusion, a pin, or a claw with a specific contour, while the second snap-fit ​​structure can be a groove, a hole, or an engagement structure corresponding to the first snap-fit ​​structure.

[0023] Preferably, the first locking structure includes multiple transmission components, which are spaced apart circumferentially along the locking sleeve. Each transmission component is provided with an insertion block, which extends circumferentially along the locking sleeve. The second locking structure includes multiple locking blocks, which are spaced apart circumferentially along the clamping sleeve. Each locking block is provided with a slot, and the number of locking blocks corresponds one-to-one with the number of slots. When the locking sleeve rotates to the locked position, at least a portion of each insertion block extends into the slot, and the transmission component abuts against the locking block. When the locking sleeve rotates to the unlocked position, the insertion block exits the corresponding slot.

[0024] When locking the drive sleeve is required, rotate the locking sleeve. As the sleeve rotates, multiple transmission components fixed to it rotate synchronously, and the inserts on the transmission components move circumferentially. When the sleeve reaches the preset locking position, each insert accurately aligns and enters the corresponding slot on the drive sleeve. In this position, the engagement between the insert and the inner wall of the slot creates an axial constraint on the drive sleeve, while the side of the transmission component abuts against the side of the slot. When unlocking the drive sleeve is required, rotate the locking sleeve in the opposite direction. The inserts exit the slot circumferentially along with the transmission components, separating the contact surfaces of the transmission components and the slots, thus completely releasing the constraint on the drive sleeve, allowing it to slide freely axially.

[0025] First, the engagement of multiple inserts and slots forms a full-circumferential lock, effectively resisting vibrations and impact loads from any direction and ensuring the absolute stability of the drive sleeve in the axial direction. Second, a single rotational motion can drive all inserts to engage or disengage synchronously, achieving rapid locking and unlocking of the drive sleeve, which greatly improves operational efficiency. Finally, when the locking drive sleeve rotates to the locked position, the contact between the transmission component and the locking block provides the operator with clear tactile feedback, enhancing the certainty of the locked state.

[0026] Preferably, the locking sleeve is provided with multiple circumferential locking structures, which are spaced apart circumferentially along the locking sleeve. Each circumferential locking structure includes a mounting block, a locking pin, and an elastic element. The mounting block is connected to the locking sleeve, and the locking pin is slidably inserted into the corresponding mounting block, allowing the locking pin to slide radially along the locking sleeve. A retaining clip is provided on the side of the locking pin facing the central axis of the through-tube cavity. The elastic element is sleeved on the outer periphery of the locking pin, and one of its components... One end is connected to the clamping head, and the other end is connected to the mounting block, for providing elastic force to drive the clamping head toward the central axis of the through-tube cavity; the outer periphery of the clamping sleeve is provided with multiple slots, and the multiple slots are distributed at intervals along the circumference of the locking sleeve; during the rotation of the locking sleeve, the locking pin has a first position and a second position. When the locking pin is in the first position, the clamping head is at least partially inserted into the slot, and when the locking pin is in the second position, the clamping head is disengaged from the slot.

[0027] When rotating the locking sleeve to lock the drive sleeve, the locking sleeve rotates. During the rotation path of the locking sleeve, at the instant the locking pin's collet aligns circumferentially with the groove on the outer wall of the clamping sleeve, under the continuous elastic force of the elastic element, the locking pin slides radially inward along the clamping sleeve, causing its collet to spring into the corresponding groove. As a certain torque continues to be applied to overcome the elastic force of the elastic element, the collet radially retracts from the current groove and extends into the next groove as the locking sleeve rotates. The engagement of the collet with the groove forms a circumferential limit, preventing free rotation of the locking sleeve and thus avoiding accidental dislodgement of the insert from the slot.

[0028] This circumferential locking structure possesses strong impact resistance, vibration resistance, and anti-loosening capabilities, ensuring the drive sleeve remains absolutely stable in a locked state during dynamic lifting operations. This avoids the risk of accidental unlocking of the drive sleeve, thereby improving the absolute stability of the pipe clamping state. Furthermore, the circumferential locking structure is tightly integrated within the radial space of the locking sleeve and the clamping sleeve, and arranged circumferentially, making the entire clamp structure more compact and easier to use in confined spaces. This helps reduce the risk of damage or misoperation due to impacts or interference.

[0029] Preferably, the surface of the card head facing the central axis of the tube cavity is an arc-shaped surface, and the groove edge of the card slot is provided with a guide rounded corner.

[0030] When the locking sleeve rotates and brings the locking head close to the slot, the curved surface of the locking head preferentially contacts the guide radius of the slot opening. As the locking sleeve continues to rotate, the locking head extends into the slot along the guide radius. The design of the slot and the curved surface greatly reduces the risk of rigid collision, scratching, or jamming between the locking head and the slot edge, extending the service life of both the locking head and the slot, and making the rotation of the locking sleeve smoother. Furthermore, even if there is a slight circumferential alignment deviation between the locking head and the slot, the locking head can adaptively fine-tune its trajectory under the guidance of the guide radius, ultimately sliding accurately into the slot, ensuring reliable locking functionality.

[0031] Secondly, the present invention also provides a pipeline laying auxiliary device, comprising: a support beam; a hanger disposed in the middle of the support beam; two aforementioned clamps, the two clamping sleeves respectively installed at both ends of the support beam, and the axes of the two pipe-penetrating cavities coincide; the pipe-penetrating cavity passes through the opposite ends of the corresponding clamping sleeves.

[0032] The pipe laying auxiliary device provided by this invention includes a hanger for connecting to a lifting device. Before lifting the pipe, the pipe is first inserted into the through-hole of two clamps, and then the pipe is clamped within the through-hole. Finally, the pipe is transported to the laying position using the lifting device. The clamping and releasing operations of the pipe have been described previously and will not be repeated here.

[0033] The beneficial effects of this invention are: (1) Multiple clamping arms are evenly distributed around the axis of the pipe cavity and rotate synchronously through the same drive structure. This basic structure can ensure that the clamping force is evenly distributed on the circumference of the pipe, avoiding pipe slippage or shaking caused by unilateral force. On this basis, a protective pad is set on the inner side of each clamping arm to avoid rigid compression of the pipe anti-corrosion layer surface. Multiple protective pads are set on each clamping arm at intervals. These protective pads can deform independently and adapt to the size and surface shape of the pipe, further homogenizing the clamping force, thereby transforming the concentrated line load of the traditional clamp into a distributed surface load, fundamentally eliminating pressure damage to the pipe anti-corrosion layer.

[0034] (2) The clamping and releasing action of the clamping arm can be realized by the sliding of the drive sleeve, which is simple and efficient. The inner wall of the drive sleeve and the rollers arranged at intervals on the clamping arm form rolling contact, which transforms the sliding friction in the clamping arm driving process into rolling friction. This not only makes the push-pull operation of the drive sleeve more effortless and smooth, but also eliminates the scraping and wear between the drive sleeve and the clamping arm.

[0035] (3) The locking function of the drive sleeve is accomplished by two sets of series-connected and complementary structures. The first set directly prevents the axial movement of the drive sleeve by engaging the circumferentially extending insert on the locking sleeve with the slot of the locking block on the drive sleeve. The second set prevents the locking sleeve from rotating by engaging the radially arranged locking head, which is pushed by an elastic element, with the slot on the clamping sleeve in the circumferential direction. The synergy of these two sets of structures enables the clamping state of the pipeline to resist severe vibration and impact, and maintains the stability and safety of the pipeline during dynamic lifting conditions.

[0036] (4) The clamp of the present invention uses a clamping sleeve as a carrier, and the driving sleeve and the locking sleeve are coaxially sleeved on its outer periphery in sequence. The rotating shaft of the clamping arm and the reset torsion spring are embedded in the clamping sleeve. The key locking driving sleeve, the first snap-fit ​​structure, the second snap-fit ​​structure and the circumferential locking structure are all highly integrated in the circumferential direction of the clamping sleeve. This allows the clamp to fully realize the functions of synchronous clamping, labor-saving driving and double safety locking without significantly increasing the axial length and overall outer dimensions. It achieves the maximum integration of functions in a small radial space, so that it has good passability and adaptability in construction environments with dense pipelines or limited space. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of a clamp according to an embodiment of the present invention; Figure 2 This is a half-sectional perspective view of a clamp according to an embodiment of the present invention; Figure 3 A schematic diagram showing the interaction between the drive sleeve and the clamping arm; Figure 4 This is a schematic diagram of the circumferential locking structure; Figure 5 This is a cross-sectional view of the circumferential locking structure; Figure 6 This is a schematic diagram of a pipeline laying auxiliary device according to an embodiment of the present invention.

[0039] Explanation of reference numerals in the attached figures: 1. Clamping sleeve; 101. Through-tube cavity; 102. Lateral through-cavity; 103. Positioning ring; 104. Slot; 1041. Guide rounded corner; 2. Clamping arm; 3. Protective pad; 4. Rotating shaft; 5. Torsion spring; 6. Drive sliding sleeve; 7. Roller; 8. Locking rotating sleeve; 9. Transmission component; 10. Insert block; 11. Locking block; 1101. Slot; 12. Outer cover; 13. Mounting block; 14. Locking pin; 1401. Lock head; 15. Elastic component; 16. Support beam; 17. Hanger. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] The following is combined Figures 1 to 6 The following describes embodiments of the present invention.

[0042] According to an embodiment of the present invention, in one aspect, a clamp is provided, which combines Figures 1 to 5 As shown, it includes: a clamping sleeve 1, having a through-hole 101 and a plurality of lateral through-holes 102, the through-hole 101 extending along the axial direction of the clamping sleeve 1 and penetrating at least one end of the clamping sleeve 1, the lateral through-holes 102 being arranged circumferentially around the through-hole 101 and penetrating the sidewall of the clamping sleeve 1; a plurality of clamping arms 2, the number of clamping arms 2 corresponding one-to-one with the lateral through-holes 102, one end of the clamping arm 2 being rotatably connected to the corresponding lateral through-hole 102, and the rotation center axis of the clamping arm 2 being perpendicular to the central axis of the through-hole 101, the side of the clamping arm 2 facing the central axis of the through-hole 101 being provided with a protective pad 3, the protective pad 3 being used to contact the outer peripheral surface of the pipe to be transported; and a driving structure connected to the clamping sleeve 1, used to drive each clamping arm 2 to rotate so that the free end of the clamping arm 2 moves toward or away from the central axis of the through-hole 101.

[0043] It is understood that the interval distribution includes non-uniform interval distribution and uniform interval distribution. In this embodiment, the clamping arm 2 has a uniform interval distribution.

[0044] In this embodiment, the clamp is used by first aligning the end of the pipe to be transported with the opening of the through-hole 101, and then inserting one end of the pipe into the through-hole 101. The drive structure is then operated, synchronously driving all clamping arms 2 to rotate around their respective axes, causing the free ends of each clamping arm 2 to approach the central axis of the through-hole 101. The protective pads 3 on each clamping arm 2 evenly contact and press against the outer circumference of the pipe from all sides, thus clamping the pipe. Once the pipe is clamped, it can be lifted. When it is necessary to release the pipe, the drive structure is operated in reverse, and the free ends of the clamping arms 2 swing outwards, allowing the pipe to be removed.

[0045] In the clamp provided in this embodiment, multiple clamping arms 2 are evenly arranged circumferentially around the through-pipe cavity 101 and synchronously driven by the same drive structure, ensuring that the clamping force is evenly distributed along the circumference of the pipe, forming a stable and reliable full-circumferential clamping. Furthermore, the protective pad 3 located on the inner side of the clamping arms 2 flexibly contacts the pipe surface during clamping, effectively dispersing and buffering the radial clamping force. This uniformly stressed and flexible clamping method avoids indentation, scratching, or wear on the pipe's anti-corrosion layer, and significantly reduces the risk of slippage, rotation, or accidental loosening of the pipe during lifting, maintaining continuous stability of the clamping state even under dynamic handling conditions. Regarding ease of operation, the movement of all clamping arms 2 can be synchronously controlled by a single drive structure, enabling rapid completion of the clamping action. Compared to the cumbersome process of manually tightening bolts one by one using traditional clamps, this not only significantly reduces the labor intensity of operators but also significantly shortens the preparation and dismantling time for pipe lifting, thereby improving construction efficiency.

[0046] Optionally, the protective pad 3 can be one of a polyurethane pad, a silicone pad, a rubber pad, etc.

[0047] Furthermore, the protective pad 3 is a rubber pad, and multiple protective pads 3 are provided on the same clamping arm 2, and are distributed at intervals along the rotation axis 4 perpendicular to the clamping arm 2.

[0048] Rubber pads possess good elasticity and flexibility, enabling them to form a flexible contact with the pipeline, avoiding indentations or scratches on the pipeline's outer anti-corrosion layer. They can also adapt to the size and surface shape of the pipeline, adhering tightly to its surface. Simultaneously, the rubber pads have a high coefficient of friction, generating significant static friction with the pipeline surface, significantly reducing the risk of slippage or rotation during hoisting. Based on these properties, multiple independent rubber pads are spaced apart along the length of the same clamping arm 2. Firstly, this ensures a uniform distribution of clamping force along the pipeline's axial direction, preventing concentrated pressure and localized compression. It also reduces stress and fatigue on individual rubber pads, improving the overall durability and reliability of the device. Secondly, each rubber pad can deform independently, adaptively conforming to the pipeline surface, ensuring tight contact with the pipeline along the entire length of the clamping arm 2, enhancing the anti-slip reliability and clamping stability of the clamping arm 2.

[0049] Furthermore, the clamping arm 2 is rotatably connected to the lateral passage cavity 102 via a rotating shaft 4. A torsion spring 5 is sleeved on the outside of the rotating shaft 4. One end of the torsion spring 5 is connected to the clamping arm 2 or the rotating shaft 4, and the other end is connected to the clamping sleeve 1. The torsion spring 5 is configured to provide a reset torque to the clamping arm 2, causing the free end of the clamping arm 2 to move away from the central axis of the through-tube cavity 101.

[0050] When the drive mechanism clamps the pipe, it overcomes the reset torque of the torsion spring 5, pushing the clamping arm 2 to rotate inward around the pivot 4 until the protective pad 3 presses against the pipe. When it is necessary to release the pipe, the drive mechanism releases the constraint on the clamping arm 2, and the elastic potential energy stored in the torsion spring 5 is immediately released, driving the clamping arm 2 to rotate outward quickly and automatically around the pivot 4, causing the protective pad 3 to detach from the pipe surface. There is no need for manual removal of the clamping arm 2; the release action is automatically completed by the torsion spring 5, resulting in a faster response and significantly shortening the cycle time for preparing the clamp for the next clamping cycle. This is especially suitable for construction scenarios requiring frequent pipe loading and unloading.

[0051] Furthermore, the driving structure includes a driving sleeve 6, which is axially slidably sleeved on the outer periphery of the clamping sleeve 1.

[0052] When the pipe needs to be clamped, the axial sliding drive sleeve 6 slides, and the inner wall of the drive sleeve 6 contacts the clamping arm 2, thereby pushing all the clamping arms 2 to rotate synchronously until the protective pad 3 presses the pipe. When the pipe needs to be removed, the reverse sliding drive sleeve 6 slides, causing the drive sleeve 6 to disengage from the clamping arm 2. At this time, the clamping arm 2 rotates outward and opens under the tension of the torsion spring 5, and then the pipe can be removed. All clamping and releasing actions can be completed by pushing and pulling the drive sleeve 6 with one hand, making the operation simple and efficient. At the same time, the nested arrangement of the drive sleeve 6 and the clamping sleeve 1 makes the structure of the clamp highly compact and integrated, which can improve the clamp's passability and anti-interference ability in complex construction sites.

[0053] Furthermore, the clamping arm 2 is provided with multiple rotatable rollers 7, which are evenly distributed along a direction perpendicular to the rotation axis 4 of the clamping arm 2. Each roller 7 has a portion protruding from the side of the clamping arm 2 opposite to the central axis of the through-tube cavity 101.

[0054] By arranging multiple freely rotatable rollers 7 at intervals along the length of the back side of the clamping arm 2, and with the rollers 7 partially protruding from the surface of the clamping arm 2 to form rolling contact with the inner wall of the drive sleeve 6, the frictional force on the drive sleeve 6 is changed from sliding friction to rolling friction. This significantly reduces the operating resistance of the drive sleeve 6, resulting in a smoother and more effortless push-pull feel. Furthermore, it avoids static friction between the drive sleeve 6 and the clamping arm 2, thereby preventing wear on both the clamping arm 2 and the drive sleeve 6, which helps extend the overall service life and clamping stability of the fixture.

[0055] Furthermore, it also includes a locking sleeve 8, which is rotatably fitted around the outer periphery of the clamping sleeve 1. The locking sleeve 8 has a locked position and an unlocked position. The locking sleeve 8 is provided with a first locking structure, and the driving slide sleeve 6 is provided with a second locking structure. When the locking sleeve 8 rotates to the locked position, the first locking structure engages with the second locking structure to prevent the driving slide sleeve 6 from sliding axially. When the locking sleeve 8 rotates to the unlocked position, the first locking structure separates from the second locking structure to allow the driving slide sleeve 6 to move axially.

[0056] After the drive sleeve 6 slides axially to clamp the pipe with the clamping arm 2, rotating the locking sleeve 8, which is fitted around the outer circumference of the clamping sleeve 1, to the locked position causes the first locking structure to engage with the second locking structure on the drive sleeve 6, thereby restricting the axial displacement of the drive sleeve 6. When it is necessary to slide the drive sleeve 6 to release the pipe, first rotate the locking sleeve 8 in the opposite direction to the unlocked position. At this time, the first locking structure disengages from the second locking structure, and the drive sleeve 6 can slide freely. The locking sleeve 8 can lock the drive sleeve 6, thereby preventing the drive sleeve 6 from sliding under vibration, impact, or accidental contact, ensuring a stable clamping state for the pipe. The drive sleeve 6 can be securely locked or released within seconds by rotation alone. Compared with the traditional bolt tightening method, the operation efficiency is higher, and the auxiliary time in pipe hoisting operations can be significantly reduced.

[0057] Optionally, the first snap-fit ​​structure may be one of a protrusion, a pin, or a claw with a specific profile, while the second snap-fit ​​structure may be a groove, a hole, or an engagement structure corresponding to the first snap-fit ​​structure.

[0058] Furthermore, the first locking structure includes multiple transmission components 9, which are evenly spaced along the circumference of the locking sleeve 8. Each transmission component 9 is provided with an insert 10, which extends along the circumference of the locking sleeve 8. The second locking structure includes multiple locking blocks 11, which are evenly spaced along the circumference of the clamping sleeve 1. Each locking block 11 is provided with a slot 1101, and the number of locking blocks 11 corresponds one-to-one with the number of slots 1101. When the locking sleeve 8 rotates to the locked position, each insert 10 passes through the corresponding slot 1101, and the transmission component 9 abuts against the locking block 11. When the locking sleeve 8 rotates to the unlocked position, the insert 10 exits the corresponding slot 1101.

[0059] When it is necessary to lock the drive sleeve 6, rotate the locking sleeve 8. As the sleeve rotates, the multiple transmission components 9 fixed to it rotate synchronously, and the inserts 10 on the transmission components 9 move circumferentially accordingly. When the sleeve rotates to the preset locking position, each insert 10 is accurately aligned and enters the slot 1101 of the corresponding latch 11 on the drive sleeve 6. In this position, the engagement between the insert 10 and the inner wall of the slot 1101 forms an axial constraint on the drive sleeve 6, while the side of the transmission component 9 abuts against the side of the latch 11. When it is necessary to unlock the drive sleeve 6, rotate the locking sleeve 8 in the opposite direction. The insert 10 exits from the slot 1101 circumferentially along with the transmission component 9, and the contact surfaces of the transmission component 9 and the latch 11 separate, thereby completely releasing the constraint on the drive sleeve 6, allowing the drive sleeve 6 to slide freely axially.

[0060] First, the engagement of multiple inserts 10 with the slots 1101 forms a full-circumferential lock, effectively resisting vibrations and impact loads from any direction and ensuring the absolute axial stability of the drive sleeve 6. Second, a single rotational motion can drive all inserts 10 to engage or disengage synchronously, achieving rapid locking and unlocking of the drive sleeve 6, greatly improving operational efficiency. Finally, when the locked drive sleeve 6 is rotated to the locked position, the contact between the transmission component 9 and the locking block 11 provides the operator with clear tactile feedback, enhancing the certainty of the locked state.

[0061] Furthermore, the locking sleeve 8 is provided with multiple circumferential locking structures, which are spaced apart circumferentially along the locking sleeve 8. Each circumferential locking structure includes a mounting block 13, a locking pin 14, and an elastic element 15. The mounting block 13 is located on the side of the locking sleeve 8 facing away from the driving slide sleeve 6. The locking pin 14 is slidably inserted into the corresponding mounting block 13, allowing the locking pin 14 to slide radially along the locking sleeve 8. The side of the locking pin 14 facing the central axis of the tube cavity 101 is provided with a locking head 1401. The elastic element 15 is a spring, which is sleeved on the outer periphery of the locking pin 14, and one end of it is connected to the locking head 1401. One end is connected to the mounting block 13 to provide elastic force for driving the clamping head 1401 toward the central axis of the through-tube cavity 101; the outer periphery of the clamping sleeve 1 is provided with multiple slots 104, which are evenly spaced along the circumference of the locking sleeve 8. Specifically, the outer periphery of the clamping sleeve 1 is provided with a positioning ring 103, and the slots 104 are disposed on the positioning ring 103; during the rotation of the locking sleeve 8, the locking pin 14 has a first position and a second position. When the locking pin 14 is in the first position, the clamping head 1401 extends into the slot 104, and when the locking pin 14 is in the second position, the clamping head 1401 exits the slot 104.

[0062] When the locking sleeve 8 is rotated to lock the drive sleeve 6, the locking sleeve 8 is rotated. During the rotation path of the locking sleeve 8, at the instant the locking pin 14's locking head 1401 aligns circumferentially with the slot 104 on the outer wall of the clamping sleeve 1, under the continuous elastic force of the elastic element 15, the locking pin 14 slides radially inward along the clamping sleeve 1, causing its locking head 1401 to spring into the corresponding slot 104. As a certain torque continues to be applied to overcome the elastic force of the elastic element 15, the locking head 1401 radially exits from the current slot 104 and extends into the next slot 104 as the locking sleeve 8 rotates. The engagement of the locking head 1401 with the slot 104 forms a circumferential limit, preventing the locking sleeve 8 from rotating freely, thereby preventing the insert 10 from accidentally dislodging from the slot 1101.

[0063] This circumferential locking structure possesses strong impact resistance, vibration resistance, and anti-loosening capabilities, ensuring that the drive sleeve 6 remains absolutely stable in its locked state during dynamic lifting operations. This avoids the risk of accidental unlocking of the drive sleeve 6, thereby improving the absolute stability of the pipe clamping state. Furthermore, the circumferential locking structure is tightly integrated within the radial space of the locking sleeve 8 and the clamping sleeve 1, and arranged circumferentially, making the entire clamp structure more compact and easier to use in confined spaces. This helps reduce the risk of damage or misoperation due to impacts or interference.

[0064] Furthermore, the surface of the card head 1401 facing the central axis of the tube cavity 101 is an arc-shaped surface, and the groove edge of the card slot 104 is provided with a guide rounded corner 1041.

[0065] When the locking sleeve 8 rotates, bringing the locking head 1401 close to the slot 104, the arc-shaped surface of the locking head 1401 preferentially contacts the guide radius 1041 of the slot 104. As the locking sleeve 8 continues to rotate, the locking head 1401 extends into the slot 104 along the guide radius 1041. The design of the slot 104 and the arc-shaped surface greatly reduces the risk of rigid collision, scratching, or jamming between the locking head 1401 and the edge of the slot, extending the service life of the locking head 1401 and the slot 104, and making the rotation of the locking sleeve 8 smoother. Furthermore, even if there is a slight circumferential alignment deviation between the locking head 1401 and the slot 104, the locking head 1401 can adaptively fine-tune its trajectory under the guidance of the guide radius 1041, ultimately sliding accurately into the slot 104, ensuring that the locking function can be reliably realized.

[0066] Furthermore, an outer cover 12 is provided on the outer periphery of the clamping sleeve 1. The side of the locking sleeve 8 facing away from the driving slide sleeve 6, the outer cover 12 and the clamping sleeve 1 together form a protective cavity. The mounting block 13, locking pin 14, elastic element 15, positioning ring 103 and slot 104 are all located in the protective cavity.

[0067] The outer cover 12 effectively prevents rainwater, mud, dust, and other foreign objects from adhering to the surfaces of the locking pin 14, the positioning ring 103, and the slot 104, thereby avoiding jamming, corrosion, and rust on these structures. This significantly improves the long-term reliability and durability of the circumferential locking structure under complex working conditions. Simultaneously, the outer cover 12 provides protection for the internal circumferential locking structure against accidental impacts and bumps, preventing deformation or failure caused by external forces.

[0068] According to an embodiment of the present invention, in another aspect, a pipeline laying auxiliary device is also provided, combined with Figures 1 to 6 As shown, it includes: a support beam 16; a hanger 17 disposed in the middle of the support beam 16; two aforementioned clamps, two clamping sleeves 1 respectively installed at both ends of the support beam 16, and the axes of the two through-tube cavities 101 coincide; the through-tube cavity 101 passes through the opposite ends of the corresponding clamping sleeve 1.

[0069] The pipe laying auxiliary device provided in this embodiment includes a hanger 17 for connection to a lifting device. Before lifting the pipe, the pipe is first inserted into the through-hole 101 of the two clamps, and then the pipe is clamped in the through-hole 101. Finally, the pipe is transported to the laying position using the lifting device. The clamping and releasing operations of the pipe have been described in the previous embodiment, so they will not be repeated here.

[0070] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A clamp, characterized in that, include: The clamping sleeve (1) has a through-hole (101) and a plurality of lateral through-holes (102). The through-hole (101) extends along the axial direction of the clamping sleeve (1) and penetrates at least one end of the clamping sleeve (1). The lateral through-holes (102) are arranged circumferentially around the through-hole (101) and penetrate the sidewall of the clamping sleeve (1). Multiple clamping arms (2) are provided, with each clamping arm (2) corresponding to a side passage cavity (102) in number. One end of each clamping arm (2) is rotatably connected to the corresponding side passage cavity (102), and the rotation center axis of each clamping arm (2) is perpendicular to the center axis of the through-pipe cavity (101). A protective pad (3) is provided on the side of each clamping arm (2) facing the center axis of the through-pipe cavity (101), and the protective pad (3) is used to contact the outer peripheral surface of the pipe to be transported. A drive structure, connected to the clamping sleeve (1), is used to drive each of the clamping arms (2) to rotate so that the free end of the clamping arm (2) moves toward or away from the central axis of the through-tube cavity (101).

2. The clamp according to claim 1, characterized in that, The protective pad (3) is a rubber pad. Multiple protective pads (3) are provided on the same clamping arm (2) and are distributed at intervals along the direction perpendicular to the rotation axis (4) of the clamping arm (2).

3. The clamp according to claim 1, characterized in that, The clamping arm (2) is rotatably connected to the lateral passage cavity (102) via a rotating shaft (4). A torsion spring (5) is sleeved on the outside of the rotating shaft (4). One end of the torsion spring (5) is connected to the clamping arm (2) or the rotating shaft (4), and the other end is connected to the clamping sleeve (1). The torsion spring (5) is configured to provide a reset torque to the clamping arm (2), causing the free end of the clamping arm (2) to move away from the central axis of the through-tube cavity (101).

4. The clamp according to claim 1, characterized in that, The driving structure includes a driving sleeve (6), which is axially slidably sleeved on the outer periphery of the clamping sleeve (1).

5. The clamp according to claim 4, characterized in that, The clamping arm (2) is provided with a plurality of rotatable rollers (7), which are spaced apart along a direction perpendicular to the rotation axis (4) of the clamping arm (2). Each roller (7) has at least a portion protruding from the side of the clamping arm (2) facing away from the central axis of the through-tube cavity (101).

6. The clamp according to claim 4, characterized in that, It also includes a locking sleeve (8), which is rotatably fitted around the outer periphery of the clamping sleeve (1). The locking sleeve (8) has a locked position and an unlocked position. The locking sleeve (8) is provided with a first snap-fit ​​structure, and the driving slide sleeve (6) is provided with a second snap-fit ​​structure. When the locking sleeve (8) rotates to the locked position, the first snap-fit ​​structure engages with the second snap-fit ​​structure to prevent the driving slide sleeve (6) from sliding axially. When the locking sleeve (8) rotates to the unlocked position, the first snap-fit ​​structure separates from the second snap-fit ​​structure to allow the driving slide sleeve (6) to move axially.

7. The clamp according to claim 6, characterized in that, The first snap-fit ​​structure includes multiple transmission components (9), which are distributed at intervals along the circumference of the locking sleeve (8). Each transmission component (9) is provided with a plug (10), which extends along the circumference of the locking sleeve (8). The second snap-fit ​​structure includes multiple snap blocks (11), which are distributed at intervals along the circumference of the clamping sleeve (1). Each snap block (11) is provided with a slot (1101), and the multiple snap blocks (11) and the multiple slots (1101) correspond one-to-one in number. When the locking sleeve (8) rotates to the locked position, each of the inserts (10) extends at least partially into the slot (1101), and the transmission member (9) abuts against the locking block (11); when the locking sleeve (8) rotates to the unlocked position, the insert (10) exits the corresponding slot (1101).

8. The clamp according to claim 6, characterized in that, The locking sleeve (8) is provided with multiple circumferential locking structures, which are spaced apart along the circumference of the locking sleeve (8). Each circumferential locking structure includes a mounting block (13), a locking pin (14), and an elastic element (15). The mounting block (13) is connected to the locking sleeve (8), and the locking pin (14) is slidably inserted into the corresponding mounting block (13), so that the locking pin (14) can slide along the radial direction of the locking sleeve (8). A locking head (1401) is provided on the side of the locking pin (14) facing the central axis of the through-tube cavity (101). The elastic element (15) is sleeved on the outer periphery of the locking pin (14), and one end of it is connected to the locking head (1401), and the other end is connected to the mounting block (13), which is used to provide elastic force to drive the locking head (1401) to move toward the central axis of the through-tube cavity (101). The clamping sleeve (1) has a plurality of slots (104) on its outer periphery, and the plurality of slots (104) are distributed at intervals along the circumferential direction of the locking sleeve (8); During the rotation of the locking sleeve (8), the locking pin (14) has a first position and a second position. When the locking pin (14) is in the first position, the locking head (1401) extends at least partially into the locking groove (104). When the locking pin (14) is in the second position, the locking head (1401) exits the locking groove (104).

9. The clamp according to claim 8, characterized in that, The surface of the card head (1401) facing the central axis of the tube cavity (101) is an arc-shaped surface, and the groove edge of the card slot (104) is provided with a guide rounded corner (1041).

10. A pipeline laying auxiliary device, characterized in that, include: Support beam (16); A hanger (17) is provided at the middle of the support beam (16); Two clamps as described in any one of claims 1 to 9, wherein the two clamping sleeves (1) are respectively installed at both ends of the support beam (16), and the axes of the two through-tube cavities (101) coincide; the through-tube cavity (101) passes through the opposite ends of the corresponding clamping sleeve (1).

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