Self-resetting clamping device and clamping method for a steel pipe protection rope
By using a push-pull electromagnet and spring reset structure for a self-resetting clamping device, the problems of cable entanglement and equipment failure during rotation of existing grippers are solved, achieving a clamping effect with high stability and low energy consumption, and is suitable for automated operation of steel pipe protection ropes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YANSHAN UNIV
- Filing Date
- 2026-06-01
- Publication Date
- 2026-07-14
AI Technical Summary
Existing grippers have problems such as air circuit entanglement, cable entanglement, and high equipment failure risk in automated operation scenarios where they rotate around the entire circumference. In particular, cylinder-driven, servo motor-driven, and normally closed electromagnetic grippers are prone to cable entanglement and wear during rotation, and the equipment is costly and has low reliability.
Using a push-pull electromagnet as the opening and closing drive source, combined with a spring reset structure, the clamping device is energized only during the opening action and de-energized during the clamping process. It utilizes the elastic potential energy of the spring to achieve self-resetting clamping, avoiding cable tangling. The structure is integrated and easy to install.
It effectively avoids cable entanglement problems under circular motion conditions, reduces failure rate and energy consumption, and improves clamping stability and reliability, making it suitable for high-speed continuous automated operation scenarios.
Smart Images
Figure CN122380077A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of clamping mechanism technology, specifically to a self-resetting clamping device and clamping method for steel pipe protection ropes, which is particularly suitable for clamping operation scenarios that require full-circumference rotation. Background Technology
[0002] In automated operation scenarios requiring grippers to perform full rotations, existing gripper drive devices suffer from several unresolved industry pain points: First, grippers driven by cylinders require a complete compressed air system. The layout of the air lines is extremely difficult during rotation, and the lines are prone to tangling, bending, wear, and leakage during full rotation. This not only prevents continuous multi-rotation operations but also poses a high risk of equipment failure. Second, grippers driven by servo motors require multi-core power cables and encoder feedback cables. These cables are prone to tangling and breakage during rotation. Continuous rotation requires multi-channel precision slip rings, significantly increasing equipment costs. Furthermore, slip rings are prone to poor contact and signal interruption over long-term use, resulting in low operational reliability. Third, conventional normally closed electromagnetic grippers require continuous power to maintain the gripping or opening / closing state. The cables must be energized throughout the rotation process, leading to severe overheating and short lifespan, failing to fundamentally solve the cable tangling problem during multi-rotation.
[0003] Therefore, there is an urgent need to design a self-resetting clamping device and clamping method for steel pipe protection ropes in order to solve the above problems. Summary of the Invention
[0004] To address the shortcomings of the existing technology, the present invention aims to provide a self-resetting clamping device and clamping method for steel pipe protection ropes. It employs a push-pull electromagnet as the opening and closing drive source, coupled with a spring reset structure. Only the opening action requires instantaneous energization, while the clamping process is completely de-energized. After power de-energization, the spring's elastic potential energy enables the clamp's self-resetting clamping function. This invention effectively avoids cable entanglement problems under circular motion conditions. Furthermore, it features a high degree of structural integration, simple installation procedures, and stable and reliable clamping.
[0005] Specifically, on one hand, the present invention provides a self-resetting clamping device for steel pipe protection ropes, comprising a main fixing plate, a clamping assembly, and a driving assembly; the clamping assembly includes a first fingertip pad, a second fingertip pad, a first clamp, a second clamp, a first slider, a second slider, a guide rail, an upper positioning seat, a lower positioning seat, a first fixing member, a second fixing member, a first spring, and a second spring; the first fingertip pad is disposed inside the first end of the first clamp; the bottom of the first clamp is connected to the first slider; the second fingertip pad is disposed inside the first end of the second clamp; the bottom of the second clamp is connected to the second slider; both the first slider and the second slider are disposed above the guide rail and slide in cooperation with the guide rail; the guide rail is disposed above the lower positioning seat; the lower positioning seat is connected to the main fixing plate; the upper positioning seat is connected to the lower positioning seat through the first fixing member and the second fixing member; the first spring is disposed between the first slider and the first fixing member, and both ends of the first spring are respectively connected to the first fixing member and the first slider; the second spring is disposed between the second slider and the second fixing member, and both ends of the second spring are respectively connected to the second fixing member and the second slider; the first clamp... The first clamp and the second clamp achieve self-locking clamping through the elastic potential energy of the first spring and the second spring. The driving assembly includes an electromagnetic drive block, a U-shaped connecting arm, a first transmission link, and a second transmission link. The electromagnetic drive block is located above the upper positioning seat, and the push rod of the electromagnetic drive block is connected to the first end of the U-shaped connecting arm. The second end of the U-shaped connecting arm is coaxially connected to the first transmission link and the second transmission link. The first transmission link is connected to the second end of the first clamp, and the second transmission link is connected to the second end of the second clamp. After the electromagnetic drive block is energized, it drives the push rod to move. The push rod drives the first transmission link and the second transmission link to move synchronously towards the first end of the first clamp and the second clamp through the U-shaped connecting arm, so that the first clamp and the second clamp open after sliding back and forth along the guide rail through the first slider and the second slider. After the protective rope enters the opening area of the first clamp and the second clamp, the electromagnetic drive block is de-energized, and the first spring and the second spring in the pre-compressed state release their elastic potential energy, pushing the first slider and the second slider to slide towards each other along the guide rail, thereby causing the first clamp and the second clamp to close inward synchronously, realizing self-locking clamping of the protective rope.
[0006] Preferably, the first clamp and the second clamp are arranged symmetrically and can move in opposite directions or in a straight line along the guide rail.
[0007] Preferably, a first groove is provided on both sides of the guide rail along its length, and a second groove matching the first groove is provided on the inner wall of the first slider and the second slider facing the guide rail. The area enclosed by the first groove and the second groove is filled with ball bearings.
[0008] Preferably, the two ends of the first spring are respectively disposed in the positioning holes provided on the first fixing member and the first slider, and the two ends of the second spring are respectively disposed in the positioning holes provided on the second fixing member and the second slider. The first spring and the second spring are both in a pre-compressed state, providing the first clamp and the second clamp with opposite closing reset elastic force respectively.
[0009] Preferably, the body of the electromagnetic drive block is fixedly connected to the upper positioning seat by bolts.
[0010] Preferably, the push rod is disposed along the axis of the electromagnetic drive block along its length and slides back and forth inside the electromagnetic drive block; the axis of the push rod is parallel to the axis of the first clamp and the second clamp.
[0011] Preferably, the U-shaped connecting arm is an integrally bent and formed structure. The first end of the U-shaped connecting arm is hinged to the push rod end of the electromagnetic drive block through the first positioning pin. The second end of the U-shaped connecting arm is set as a C-shaped structure and is coaxially hinged to the first end of the first transmission link and the second transmission link through the second positioning pin.
[0012] Preferably, the second end of the first transmission link is hinged to the first clamp via a third locating pin, and the second end of the second transmission link is hinged to the second clamp via a fourth locating pin.
[0013] Preferably, the first transmission link and the second transmission link are arranged in a figure-eight shape, and the first transmission link and the second transmission link swing synchronously in a mirror direction on the guide rail, and the travel distance of the first transmission link and the second transmission link on the guide rail is equal to the travel distance of the push rod of the electromagnetic drive block.
[0014] Secondly, the present invention provides a clamping method for a self-resetting clamping device for steel pipe protection ropes, comprising the following steps: S1. Connect the electromagnetic drive block to the power cord and turn on the power. The push rod extends towards the first end of the first clamp and the second clamp. The U-shaped connecting arm drives the first transmission connecting rod and the second transmission connecting rod to open. The first clamp and the second clamp move in opposite directions along the guide rail through the first slider and the second slider. At the same time, the first slider and the second slider compress the first spring and the second spring, so that the first spring and the second spring are in a pre-compressed state, completing the opening action of the clamp and waiting to clamp the protective rope. S2. After the protective rope enters the opening area of the first clamp and the second clamp, the connection between the electromagnetic drive block and the power line is disconnected. The first spring and the second spring, which are in a pre-compressed state, release their elastic potential energy and push the first slider and the second slider to slide towards each other along the guide rail, so that the first clamp and the second clamp close inward synchronously. The first fingertip pad and the second fingertip pad fit together to clamp the protective rope, and self-locking clamping is achieved under the action of the spring. S3. The clamping assembly drives the protective rope to make a circular winding motion around the tube. During the circular winding motion, the clamping is achieved by the mechanical elasticity of the first spring and the second spring. S4. After the circumferential winding action is completed, connect the electromagnetic drive block to the power line again and repeat the action of S1 to drive the first clamp and the second clamp to open again, release the free end of the rope, and complete one self-resetting clamping and protection rope operation.
[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention has a more reasonable structural design and is easier to install. It uses a push-pull electromagnet as the driving component for opening and closing, and is combined with a clamping component with a spring reset structure. The first clamp and the second clamp complete the instantaneous opening action under the drive of the push-pull electromagnet. Under the pre-compression reset action of the spring, the clamping is self-locked and closed after power failure through spring self-reset.
[0016] 2. The push-pull electromagnet of the present invention only needs to be energized momentarily when the clamp is opened, and the power is cut off throughout the clamping process. This not only solves the problem of easy tangling of cylinder air circuits and motor cables in existing circular motion clamping devices, but also eliminates the need for continuous air and power supply throughout the process, reducing the failure rate and energy consumption.
[0017] 3. This invention utilizes a push-pull electromagnet combined with a U-shaped connecting arm and a double-link transmission structure to enable the first and second clamps to open and close synchronously along the guide rail. This results in higher synchronization of clamp opening and closing actions, more consistent clamping position and force, and more reliable power-off self-locking function, significantly improving motion safety and clamping stability. It can be stably applied for long-term use in high-speed, continuous automated operation scenarios, enhancing motion reliability and clamping stability.
[0018] 4. The first and second clamps of the present invention can be adapted to ropes of different diameters according to the size of opening and closing, so as to meet the clamping requirements of steel pipe protection ropes under circular motion conditions, and provide a technical basis for anti-winding operations in automated winding, knotting and other processes. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall isometric structure of the self-resetting clamping device for steel pipe protection rope of the present invention; Figure 2 This is a front view schematic diagram of the self-resetting clamping device for steel pipe protection rope of the present invention; Figure 3 This is a top view of the internal structure of the self-resetting clamping device for steel pipe protection rope of the present invention after removing the upper positioning seat; Figure 4 This is a side view of the self-resetting clamping device for steel pipe protection ropes according to the present invention. Figure 5 This is a schematic flowchart of the clamping method of the self-resetting clamping device for steel pipe protection rope of the present invention.
[0020] Key reference numerals: 1. Main fixing plate; 2. First fingertip pad; 3. Second fingertip pad; 4. Second clamp; 5. Second fixing component; 6. Upper positioning seat; 7. U-shaped connecting arm; 8. First positioning pin; 9. Electromagnetic drive block; 10. First fixing component; 11. Lower positioning seat; 12. Second transmission link; 13. First clamp; 14. Fourth positioning pin; 15. Second positioning pin; 16. First transmission link; 17. Third positioning pin; 18. Guide rail; 19. Second slider; 20. First slider; 21. First spring; 22. Second spring; Support plate 23. Detailed Implementation
[0021] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.
[0022] This invention provides a self-resetting clamping device for steel pipe protection ropes, such as... Figures 1-4 As shown, it includes a main fixing plate 1, a clamping assembly, and a drive assembly. The main fixing plate 1 is the mounting base for the entire gripper, made of a one-piece machined steel plate. A support plate 23 is provided on the main fixing plate 1, and the support plate 23 has standardized mounting holes. The clamping assembly and the drive assembly are both fixedly mounted on the support plate 23 of the main fixing plate 1. The clamping assembly and the drive assembly are connected by a transmission to realize the synchronous opening and closing of the gripper and the self-locking clamping function when the power is off.
[0023] The clamping assembly includes a first fingertip pad 2, a second fingertip pad 3, a first clamp 13, a second clamp 4, a first slider 20, a second slider 19, a guide rail 18, an upper positioning seat 6, a lower positioning seat 11, a first fixing member 10, a second fixing member 5, a first spring 21, and a second spring 22.
[0024] The first fingertip pad 2 is fixedly connected to the inner side of the first end of the first clamp 13 by adhesive bonding or countersunk screws, and the second fingertip pad 3 is fixedly connected to the inner side of the first end of the second clamp 4 by adhesive bonding or countersunk screws. The first end of the first clamp 13 and the first clamp 4 both refer to the clamping end. In a preferred embodiment of the present invention, the first fingertip pad 2 and the second fingertip pad 3 are made of wear-resistant and non-slip rubber or polyurethane material to increase the clamping friction, prevent the large-diameter steel pipe protection rope from slipping off, and protect the surface of the rope from rigid clamping damage.
[0025] The bottom of the first clamp 13 is fixedly connected to the upper surface of the first slider 20 by bolts, and the bottom of the second clamp 4 is fixedly connected to the upper surface of the second slider 19 by bolts. Both the first slider 20 and the second slider 19 are located above the guide rail 18 and slide in cooperation with it. In a preferred embodiment of the invention, the symmetrically arranged first slider 20 and second slider 19 are nested on the guide rail 18 and can slide in opposite or opposite directions along the length of the guide rail 18. The first clamp 13 and the second clamp 4 are symmetrically arranged and slide synchronously through the first and second sliders.
[0026] The lower positioning seat 11 is connected to the main fixing plate 1, and the guide rail 18 is fixedly installed above the lower positioning seat 11. Specifically, a horizontally arranged support plate 23 is installed on the lower part of the main fixing plate 1, and the bottom of the lower positioning seat 11 is fixedly connected to the support plate 23 by bolts. The guide rail 18 is fixedly installed on the upper surface of the lower positioning seat 11 by countersunk screws, and the guide rail 18 is horizontally arranged along the transverse center line of the support plate 23.
[0027] In a preferred embodiment of the present invention, first grooves extending along the length direction are provided on both the left and right side walls of the guide rail 18. Second grooves matching the first grooves are provided on the inner walls of the first slider 20 and the second slider 19 facing the guide rail 18. When the first groove and the second groove on the same side are opposite each other, they enclose a closed installation area. The installation area is filled with a number of steel balls, so that the first slider 20, the second slider 19 and the guide rail 18 form a rolling friction fit, which greatly reduces the frictional resistance of the opening and closing action, improves the smoothness of the action and the service life of the components.
[0028] In this embodiment, the upper positioning seat 6 covers the lower positioning seat 11. The first end of the upper positioning seat 6 is fixedly connected to the lower positioning seat 11 through the first fixing member 10, and the second end of the upper positioning seat 6 is fixedly connected to the lower positioning seat 11 through the second fixing member 5. The upper positioning seat 6 and the lower positioning seat 11 enclose and form an installation cavity. The guide rail 18, the first slider 20, the second slider 19, the first spring 21, and the second spring 22 are all disposed in the installation cavity and move safely and stably within the installation cavity, effectively avoiding jamming of moving parts and improving structural protection and operational stability. Specifically, the first fixing member and the second fixing member are both provided with mounting holes, and the upper positioning seat and the lower positioning seat are fixedly connected to the first fixing member and the second fixing member by bolts at the corresponding mounting holes.
[0029] A first spring 21 is disposed between the first slider 20 and the first fixing member 10, with both ends of the first spring 21 connected to the first fixing member 10 and the first slider 20, respectively. A second spring 22 is disposed between the second slider 19 and the second fixing member 5, with both ends of the second spring 22 connected to the second fixing member 5 and the second slider 19, respectively. Specifically, both the first spring 21 and the second spring 22 are cylindrical compression helical springs, symmetrically arranged inside the mounting cavity. The first spring 22 has two ends respectively disposed in positioning holes provided on the first fixing member 10 and the first slider 20, and is respectively limited and connected to the first fixing member 10 and the first slider 20 through the positioning holes. The second spring 22 has two ends respectively disposed in positioning holes provided on the second fixing member 5 and the second slider 19, and is respectively limited and connected to the second fixing member 5 and the second slider 19 through the positioning holes. The first spring 21 and the second spring 22 are always in a pre-compressed state, providing a continuous, oppositely closing reset force for the first clamp 13 and the second clamp 4, ensuring that when the electromagnetic drive block 9 is de-energized, the clamps can automatically close and maintain a stable clamping force by means of the elastic potential energy of the springs, thus realizing the function of self-resetting clamping.
[0030] The drive assembly includes an electromagnetic drive block 9, a U-shaped connecting arm 7, a first transmission connecting rod 16, a second transmission connecting rod 12, a first positioning pin 8, a second positioning pin 15, a third positioning pin 17, and a fourth positioning pin 14. The electromagnetic drive block is located above the upper positioning seat, and the push rod of the electromagnetic drive block is connected to the first end of the U-shaped connecting arm; the second end of the U-shaped connecting arm is coaxially connected to the first and second transmission connecting rods; the first transmission connecting rod is connected to the second end of the first clamp, and the second transmission connecting rod is connected to the second end of the second clamp.
[0031] Specifically, the electromagnetic drive block 9 adopts a DC single-pass push-pull electromagnet. Its body is fixedly installed on the upper positioning seat by bolts and is located on the side closer to the second end of the first and second clamps, that is, on the side away from the clamping end. The push rod of the electromagnetic drive block 9 is arranged through the axis of the electromagnetic drive block in the length direction and slides back and forth inside the electromagnetic drive block. The axis of the push rod is parallel to the axis of the first and second clamps. The extension and retraction direction of the push rod is perpendicular to the length direction of the guide rail 18. The electromagnetic drive block 9 only generates electromagnetic attraction when energized, driving the push rod to extend forward; when the power is off, the electromagnetic attraction disappears instantly, the push rod has no holding force and can retract freely, maintaining the clamping state without continuous power supply.
[0032] The U-shaped connecting arm 7 is a one-piece bent metal structural component. The first end of the U-shaped connecting arm 7 is hinged to the end of the push rod 23 of the electromagnetic drive block 9 via a first positioning pin 8. The second end of the U-shaped connecting arm 7 is a C-shaped structure. The upper and lower ends of the C-shaped structure are coaxially hinged to the first ends of the first transmission link 16 and the second transmission link 12 via second positioning pins 15. Specifically, the second positioning pin passes through the upper end face of the C-shaped structure, the first end of the first transmission link, the first end of the second transmission link, and the lower end face of the C-shaped structure, making them coaxially connected. In a preferred embodiment of the invention, the U-shaped connecting arm 7 is used to convert the power transmission direction of the push rod of the electromagnetic drive block 9, synchronously converting the linear extension and retraction motion of the push rod into the symmetrical swinging motion of the first transmission link 16 and the second transmission link 12, ensuring that the opening and closing actions of the first clamp 13 and the second clamp 4 are completely synchronized, avoiding instability caused by unilateral load.
[0033] The second end of the first transmission link 16 is hinged to the second end of the first clamp 13 via the third positioning pin 17, and the second end of the second transmission link 12 is hinged to the second end of the second clamp 4 via the fourth positioning pin 14. The first transmission link 16 and the second transmission link 12 are arranged in a symmetrical figure-eight shape, and the travel distance of the first transmission link and the second transmission link on the guide rail is equal to the travel distance of the push rod of the electromagnetic drive block. That is, the swing stroke of the two is limited by the extension stroke of the push rod of the electromagnetic drive block 9, so that the first transmission link and the second transmission link swing synchronously in a mirror direction on the guide rail under the drive of the electromagnetic drive block 9, and synchronously drive the first clamp 13 and the second clamp 4 to move within the preset effective opening and closing stroke of the present invention, avoiding damage to the components due to overtravel.
[0034] The working method of the present invention will be further described in detail below with reference to the embodiments: like Figure 5 As shown, the specific implementation steps of the clamping method of the self-resetting clamping device for steel pipe protection rope provided by the present invention are as follows: S1, the first and second clamps open.
[0035] When the first clamp 13 and the second clamp 4 need to open, the electromagnetic drive block 9 is connected to the power cord for instantaneous power supply. The electromagnetic drive block 9 generates electromagnetic attraction to drive the push rod 23 to extend towards the first end (clamping end) of the first clamp 13 and the second clamp 4. At the same time, the U-shaped connecting arm 7 connected to the push rod 23 causes the second ends of the first transmission link 16 and the second transmission link 12 to move synchronously towards the first end of the first clamp 13 and the second clamp 4. The second ends of the first transmission link 16 and the second transmission link 12 open and the included angle gradually increases. Then, the first transmission link 16 and the second transmission link 12 pull the first clamp 13 and the second clamp 4 to slide in opposite directions to the left and right along the guide rail 18 through the first slider 20 and the second slider 19. At the same time, the first slider 20 and the second slider 19 compress the first spring 21 and the second spring 22, so that the first spring and the second spring are in a pre-compressed state, completing the opening action of the first end (clamping end) of the first clamp and the second clamp, waiting to clamp the protective rope.
[0036] S2, the first clamp and the second clamp hold the protective rope.
[0037] After the protective rope for the steel pipe enters the opening area of the first clamp 13 and the second clamp 4, the connection between the electromagnetic drive block 9 and the power line is disconnected, the power supply mode is released, the electromagnetic attraction disappears instantly, and the push rod 23 loses its driving force. At this time, the first spring 21 and the second spring 22, which are in a pre-compressed state, release their elastic potential energy, pushing the first slider 20 and the second slider 19 to slide towards each other along the guide rail 18, causing the first clamp 13 and the second clamp 4 to close inward synchronously. The first fingertip pad 2 and the second fingertip pad 3 fit together to clamp the protective rope, providing flexible protection for the rope. At this time, under the action of the mechanical elastic force of the spring, the first clamp and the second clamp achieve self-locking clamping without the need for the electromagnetic drive block to be energized.
[0038] S3. The clamp assembly drives the protective rope to perform a circular winding motion around the tube.
[0039] The clamping assembly drives the protective rope to perform a circular winding motion around the steel pipe along with the synchronous belt module. During the circular winding process, the electromagnetic drive block 9 is disconnected from the power cord and remains de-energized. The electromagnetic drive block 9 and the clamping assembly wind synchronously, preventing the cable from getting tangled. Furthermore, the entire winding process is maintained by the mechanical elasticity of the first spring 21 and the second spring 22, ensuring a stable clamping force. This eliminates the need for continuous power supply from the electromagnetic drive block, fundamentally preventing the problem of the follower cable getting tangled, pulled, or damaged during the circular motion.
[0040] S4. First and second clamps release and reset: After the circumferential winding action is completed, when it is necessary to release the rope, connect the electromagnetic drive block 9 to the power line again to provide instantaneous power, repeat the action of S1, push rod 23 extends, and finally the first clamp 13 and the second clamp 4 open again, releasing the free end of the rope and completing a complete clamping and protection rope and circumferential winding operation.
[0041] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims
1. A self-resetting clamping device for steel pipe protection ropes, characterized in that: It includes a main mounting plate, a clamping assembly, and a drive assembly; The clamping assembly includes a first fingertip pad, a second fingertip pad, a first clamp, a second clamp, a first slider, a second slider, a guide rail, an upper positioning seat, a lower positioning seat, a first fixing member, a second fixing member, a first spring, and a second spring. The first fingertip pad is located inside the first end of the first clamp. The bottom of the first clamp is connected to the first slider. The second fingertip pad is located inside the first end of the second clamp. The bottom of the second clamp is connected to the second slider. Both the first and second sliders are located above the guide rail and slide in cooperation with it. The guide rail is located above the lower positioning seat. The lower positioning seat is connected to the main fixing plate. The upper positioning seat is connected to the lower positioning seat through the first and second fixing members. The first spring is located between the first slider and the first fixing member, and both ends of the first spring are connected to the first fixing member and the first slider, respectively. The second spring is located between the second slider and the second fixing member, and both ends of the second spring are connected to the second fixing member and the second slider, respectively. The first clamp and the second clamp achieve self-locking clamping through the elastic potential energy of the first and second springs. The drive assembly includes an electromagnetic drive block, a U-shaped connecting arm, a first transmission link, and a second transmission link; the electromagnetic drive block is located above the upper positioning seat and the push rod of the electromagnetic drive block is connected to the first end of the U-shaped connecting arm; the second end of the U-shaped connecting arm is coaxially connected to the first transmission link and the second transmission link; the first transmission link is connected to the second end of the first clamp, and the second transmission link is connected to the second end of the second clamp. When the electromagnetic drive block is energized, it drives the push rod to move. The push rod drives the first transmission link and the second transmission link to move synchronously towards the first end of the first clamp and the second clamp through the U-shaped connecting arm. This causes the first clamp and the second clamp to open after sliding back and forth along the guide rail via the first slider and the second slider. After the protective rope enters the opening area of the first clamp and the second clamp, the electromagnetic drive block is de-energized. The first spring and the second spring, which are in a pre-compressed state, release their elastic potential energy and push the first slider and the second slider to slide towards each other along the guide rail. This causes the first clamp and the second clamp to close inward synchronously, achieving self-locking clamping of the protective rope.
2. The self-resetting clamping device for steel pipe protection rope according to claim 1, characterized in that: The first and second clamps are arranged symmetrically and can move in opposite directions or in a straight line along the guide rail.
3. The self-resetting clamping device for steel pipe protection rope according to claim 1, characterized in that: First grooves are provided on both sides of the guide rail along its length. Second grooves matching the first grooves are provided on the inner walls of the first and second sliders facing the guide rail. The area enclosed by the first and second grooves is filled with ball bearings.
4. The self-resetting clamping device for steel pipe protection rope according to claim 2, characterized in that: The first spring has its two ends respectively located in the positioning holes provided on the first fixing member and the first slider, and the second spring has its two ends respectively located in the positioning holes provided on the second fixing member and the second slider. Both the first spring and the second spring are in a pre-compressed state, providing the first clamp and the second clamp with opposite closing reset elastic force respectively.
5. The self-resetting clamping device for steel pipe protection rope according to claim 1, characterized in that: The body of the electromagnetic drive block is fixedly connected to the upper positioning seat by bolts.
6. The self-resetting clamping device for steel pipe protection rope according to claim 1, characterized in that: The push rod is positioned along the axis of the electromagnetic drive block along its length and slides back and forth inside the electromagnetic drive block; the axis of the push rod is parallel to the axes of the first clamp and the second clamp.
7. The self-resetting clamping device for steel pipe protection rope according to claim 1, characterized in that: The U-shaped connecting arm is a one-piece bent and formed structure. The first end of the U-shaped connecting arm is hinged to the push rod end of the electromagnetic drive block through the first positioning pin. The second end of the U-shaped connecting arm is set as a C-shaped structure and is coaxially hinged to the first end of the first transmission link and the second transmission link through the second positioning pin.
8. The self-resetting clamping device for steel pipe protection rope according to claim 7, characterized in that: The second end of the first transmission link is hinged to the first clamp via the third locating pin, and the second end of the second transmission link is hinged to the second clamp via the fourth locating pin.
9. The self-resetting clamping device for steel pipe protection rope according to claim 8, characterized in that: The first and second transmission links are arranged in a figure-eight shape. The first and second transmission links swing synchronously in a mirror direction on the guide rail, and the travel distance of the first and second transmission links on the guide rail is equal to the travel distance of the push rod of the electromagnetic drive block.
10. The clamping method of the self-resetting clamping device for steel pipe protection rope according to any one of claims 1-9, characterized in that: It includes the following steps: S1. Connect the electromagnetic drive block to the power cord and turn on the power. The push rod extends towards the first end of the first clamp and the second clamp. The U-shaped connecting arm drives the first transmission connecting rod and the second transmission connecting rod to open. The first clamp and the second clamp move in opposite directions along the guide rail through the first slider and the second slider. At the same time, the first slider and the second slider compress the first spring and the second spring, so that the first spring and the second spring are in a pre-compressed state, completing the opening action of the clamp and waiting to clamp the protective rope. S2. After the protective rope enters the opening area of the first clamp and the second clamp, the connection between the electromagnetic drive block and the power line is disconnected. The first spring and the second spring, which are in a pre-compressed state, release their elastic potential energy and push the first slider and the second slider to slide towards each other along the guide rail, so that the first clamp and the second clamp close inward synchronously. The first fingertip pad and the second fingertip pad fit together to clamp the protective rope, and self-locking clamping is achieved under the action of the spring. S3. The clamping assembly drives the protective rope to make a circular winding motion around the tube. During the circular winding motion, the clamping is achieved by the mechanical elasticity of the first spring and the second spring. S4. After the circumferential winding action is completed, connect the electromagnetic drive block to the power line again and repeat the action of S1 to drive the first clamp and the second clamp to open again, release the free end of the rope, and complete one self-resetting clamping and protection rope operation.