Chain link pipe cover fastening device and method of use

Abstract

The present application relates to a kind of chain pipeline cover fastening device and method for using, device includes frame, gear shaft, roller shaft, camshaft and fastening chain, gear shaft is installed on frame, gear shaft is fixed with transmission gear, stop ratchet and drive ratchet, the inside hinged of frame is matched with the stop ratchet pawl of stop ratchet, the outside of frame is equipped with driving element by shaft sleeve, driving element is hinged with the drive pawl matched with drive ratchet, driving element is connected with operating handle, roller shaft both ends are respectively clamped in the strip-shaped hole on frame, roller shaft is installed with the pressure roller matched with transmission gear, camshaft both ends are respectively clamped in the shaft hole on frame, camshaft is fixed with the hand control cam matched with roller shaft, fastening chain one end is fixedly connected with frame, fastening chain other end is passed from the top pressure roller upside and is engaged with transmission gear, it has simple structure, fixed reliable, the advantages such as strong practicality;Method has the advantages such as simple operation, high work efficiency.

Description

Technical Field

[0001] This invention relates to a fastening device, specifically a chain-type pipe cover fastening device, and a method of using the fastening device. Background Technology

[0002] In the field of natural gas transmission and distribution, leaking pipelines are often repaired using cover plates. Before welding the cover plate to the pipeline, it needs to be tightly fixed to the pipeline to ensure welding quality and repair effectiveness. Currently, steel cable ties are commonly used to bind and fix the cover plate to the pipeline. While this method achieves basic fixing, it suffers from problems such as weak binding and poor reliability, affecting welding quality and repair effectiveness. Furthermore, the cable ties cannot be reused, resulting in resource waste. Summary of the Invention

[0003] The purpose of this invention is to provide a chain-type pipe cover fastening device and its usage method. The fastening device has the advantages of simple structure, convenient use, reliable fixation, and strong practicality; the method has the advantages of simple operation and high work efficiency.

[0004] To address the problems existing in the prior art, this invention provides a chain-type pipe cover fastening device, including a frame, a gear shaft, a roller shaft, a cam shaft, and a fastening chain. Both ends of the gear shaft are mounted on the frame via first bearings. A transmission gear is fixed in the middle of the gear shaft. A stop ratchet is fixed on the gear shaft at the inner side of the frame, and a drive ratchet is fixed on the gear shaft at the outer side of the frame. A stop pawl that cooperates with the stop ratchet is hinged to the inner side of the frame via a bracket. A cylindrical drive component coaxial with the drive ratchet is clamped to the outer side of the frame via a bushing. A drive component with a drive mechanism is hinged to its inner wall. The drive pawl is engaged with a ratchet, and the drive component is connected to an operating handle. The roller shaft is located below the gear shaft, and both ends of the roller shaft are respectively fitted into inclined slots on the frame. A top-pressure roller that engages with the transmission gear is mounted on the middle of the roller shaft through a second bearing. The cam shaft is located below the roller shaft, and both ends of the cam shaft are respectively fitted into shaft holes on the frame. Hand-controlled cams that engage with the roller shaft are fixed at both ends of the cam shaft and at positions outside the frame. One end of the fastening chain is fixedly connected to the frame, and the other end of the fastening chain passes over the top of the top-pressure roller and meshes with the transmission gear.

[0005] Furthermore, the present invention provides a chain-type pipe cover fastening device, wherein two of the stop ratchet, bracket and stop pawl are symmetrically provided; two of the drive ratchet, bushing, drive component and drive pawl are also symmetrically provided.

[0006] Furthermore, the present invention provides a chain-type pipe cover fastening device, wherein the bushing includes a sleeve fixed on a frame and a retaining ring fixed on the sleeve by screws; the driving component is fixed with a retaining seat by a connecting plate distributed circumferentially, the retaining seat having an internal hexagonal groove; the operating handle includes a push-pull rod and two wrenches, the two ends of the push-pull rod being fixedly connected to the upper ends of the two wrenches by bolts respectively; the lower ends of the two wrenches are respectively provided with hexagonal clasps, and the hexagonal clasps of the two wrenches are respectively located in the internal hexagonal grooves of the two driving components.

[0007] Furthermore, the present invention provides a chain-type pipe cover fastening device, wherein a paddle, a positioning ear plate, and a stop are fixed on the hand-controlled cam, a positioning pin is installed on the positioning ear plate and the frame through a positioning hole, and the stop is configured to cooperate with the roller shaft.

[0008] Furthermore, the present invention provides a chain-type pipe cover fastening device, wherein the frame includes a bottom plate, a top plate and two side plates, the bottom plate is matched with the pipe cover, and the two side plates are arranged in parallel with their upper and lower ends corresponding to and fixedly connected to the top plate and the bottom plate.

[0009] Furthermore, in the present invention, a chain-type pipe cover fastening device is provided, wherein the two ends of the gear shaft are respectively mounted on two side plates via first bearings, two brackets are respectively fixed on the inner side of the two side plates, and two bushings are respectively fixed on the outer side of the two side plates.

[0010] Furthermore, the present invention provides a chain-type pipe cover fastening device, wherein the strip-shaped hole and the shaft hole are provided on two side plates, the two ends of the roller shaft are respectively fastened to the two side plates through the strip-shaped hole, and the two ends of the cam shaft are respectively fastened to the two side plates through the shaft hole.

[0011] Furthermore, the present invention provides a chain-type pipe cover fastening device, wherein a connecting rod and a support rod are fixed between the two side plates, two ring platforms are fixed in the middle of the connecting rod, one end of the fastening chain is hung on the connecting rod between the two ring platforms by a hook, and the other end of the fastening chain passes over the upper side of the support rod.

[0012] Furthermore, the present invention provides a chain-type pipe cover fastening device, wherein the fastening chain is a three-row roller chain, three transmission gears are arranged side by side, the top pressure rollers are respectively provided with baffles to block the fastening chain on both sides, and the top plate is provided with a rectangular hole.

[0013] Based on the same concept, the present invention also provides a method for using the above-mentioned chain-type pipe cover fastening device, comprising the following steps:

[0014] S1. Rotate the hand-controlled cam clockwise to make the roller shaft fall down along the strip hole, and then pull the movable end of the fastening chain out from between the top pressure roller and the transmission gear;

[0015] S2. Place the cover plate on the pipe, place the frame on the cover plate, and let the movable end of the fastening chain pass around the pipe and be placed between the top pressure roller and the transmission gear.

[0016] S3. Rotate the hand-controlled cam counterclockwise to make the roller shaft rise along the strip hole, and squeeze it through the top pressure roller to make the fastening chain mesh with the transmission gear;

[0017] S4. With one hand supporting the frame and the other hand repeatedly pushing and pulling the operating handle until the fastening chain is taut and the cover plate is tightly pressed against the pipe;

[0018] S5. Fix the cover plate to the pipe by welding;

[0019] S6. Rotate the manual control cam clockwise to make the roller shaft fall along the strip hole, then pull the movable end of the fastening chain out from between the top pressure roller and the transmission gear, and remove the frame from the cover plate.

[0020] Compared with existing technologies, the chain-type pipe cover fastening device and its usage method of the present invention have the following advantages: The present invention uses a frame, gear shaft, roller shaft, cam shaft, and fastening chain. Both ends of the gear shaft are mounted on the frame via first bearings. A transmission gear is fixed in the middle of the gear shaft. A stop ratchet is fixed on the gear shaft and inside the frame. A drive ratchet is fixed on the gear shaft and outside the frame. A stop pawl that engages with the stop ratchet is hinged to the inside of the frame via a bracket. A cylindrical drive component coaxial with the drive ratchet is mounted on the outside of the frame via a bushing. The inner wall of the drive component is hinged to the drive ratchet. A drive pawl engaged with a moving ratchet connects the drive component to the operating handle. The roller shaft is positioned below the gear shaft, with both ends of the roller shaft fitted into inclined slots on the frame. A pressure roller, engaging with the transmission gear, is mounted in the middle of the roller shaft via a second bearing. A cam shaft is positioned below the roller shaft, with both ends fitted into shaft holes on the frame. Hand-operated cams, engaging with the roller shaft, are fixed at both ends of the cam shaft, located on the outer side of the frame. One end of a fastening chain is fixedly connected to the frame, while the other end of the fastening chain passes over the pressure roller and meshes with the transmission gear. This constitutes a simple, easy-to-use, reliable, and highly practical chain-type pipe cover fastening device. When fixing the cover plate, first rotate the hand-controlled cam clockwise to allow the roller shaft to descend through the slotted hole, then pull the movable end of the fastening chain out from between the pressure roller and the drive gear. Next, place the cover plate on the pipe, place the frame on the cover plate, and allow the movable end of the fastening chain to pass around the pipe and be positioned between the pressure roller and the drive gear. Then, rotate the hand-controlled cam counterclockwise to allow the roller shaft to rise through the slotted hole, and the pressure roller will press the fastening chain into the drive gear. Then, support the frame with one hand and repeatedly push and pull the operating handle with the other hand until the fastening chain is taut and the cover plate is firmly pressed against the pipe, thus completing the fixation of the cover plate. Finally, weld the cover plate to the pipe, and rotate the hand-controlled cam clockwise to allow the roller shaft to descend through the slotted hole, then pull the movable end of the fastening chain out from between the pressure roller and the drive gear, and remove the frame from the cover plate.This invention provides stable support and connection through a frame, reliable power transmission for tightening the fastening chain through a gear shaft and transmission gear, prevents the gear shaft from rotating by a stop ratchet and stop pawl, and improves the convenience of the tightening operation by a drive ratchet and drive pawl. Simply push and pull the operating handle to make the gear shaft rotate continuously clockwise, thereby continuously tightening the fastening chain through the transmission gear. The roller shaft and top pressure roller ensure reliable engagement between the transmission gear and the fastening chain. By placing both ends of the roller shaft in the slotted hole and providing a cam shaft and a hand-controlled cam that cooperates with the roller shaft, the roller shaft can be moved up and down as needed. This allows space to be provided for loosening the fastening chain after the cover plate is welded by the falling roller shaft and top pressure roller. Because the roller shaft and top pressure roller are located below the gear shaft and transmission gear, only a little force is needed to disengage the fastening chain from the transmission gear when loosening. Compared with existing technologies, the chain-type pipe cover fastening device provided by this invention not only improves the stability and reliability of pipe cover fixing, but also allows for repeated use, avoiding resource waste. The method of using the chain-type pipe cover fastening device provided by this invention has the advantages of simple operation and high work efficiency.

[0021] The following detailed description of the chain-type pipe cover fastening device and its usage method according to the present invention, with reference to the specific embodiments shown in the accompanying drawings, will be further explained in detail. Attached Figure Description

[0022] Figure 1 This is a front view of a chain-type pipe cover fastening device according to the present invention;

[0023] Figure 2 for Figure 1 A magnified view of a portion of position A in the middle;

[0024] Figure 3 This is a partial left view of a chain-type pipe cover fastening device according to the present invention;

[0025] Figure 4 Partial axial measurement of a chain-type pipe cover fastening device according to the present invention. Figure 1 ;

[0026] Figure 5 Partial axial measurement of a chain-type pipe cover fastening device according to the present invention. Figure 2 ;

[0027] Figure 6 for Figure 1 BB view in the middle;

[0028] Figure 7 for Figure 3 CC view in the middle;

[0029] Figure 8This is a front view of the chain-type pipe cover fastening device of the present invention in use.

[0030] Figure 9 This is an isometric view of the chain-type pipe cover fastening device of the present invention in use. Detailed Implementation

[0031] First, it should be noted that the directional terms such as up, down, left, right, front, and back used in this invention are merely descriptions based on the accompanying drawings for ease of understanding, and are not intended to limit the technical solution or the scope of protection claimed in this invention.

[0032] like Figures 1 to 9 The embodiment of the chain-type pipe cover fastening device of the present invention shown includes a frame 1, a gear shaft 2, a roller shaft 3, a cam shaft 4, and a fastening chain 5. Both ends of the gear shaft 2 are mounted on the frame 1 via first bearings 21. A transmission gear 22 is fixed in the middle of the gear shaft 2. A stop ratchet 23 is fixed on the gear shaft 2 and inside the frame 1, and a drive ratchet 24 is fixed on the gear shaft 2 and outside the frame 1. A stop pawl 61, cooperating with the stop ratchet 23, is hinged to the inside of the frame 1 via a bracket 6. A cylindrical drive member 8, coaxial with the drive ratchet 24, is clamped to the outside of the frame 1 via a bushing 7. A drive pawl 81, cooperating with the drive ratchet 24, is hinged to the inner wall of the drive member 8, and the drive member 8 is connected to an operating handle 9. The roller shaft 3 is positioned below the gear shaft 2, with both ends of the roller shaft 3 respectively fitted into the inclined slots 11 on the frame 1. A pressure roller 32, which meshes with the transmission gear 22, is mounted in the middle of the roller shaft 3 via a second bearing 31. A cam shaft 4 is positioned below the roller shaft 3, with both ends of the cam shaft 4 respectively fitted into shaft holes on the frame 1. Hand-operated cams 41, which mesh with the roller shaft 3, are fixed at both ends of the cam shaft 4, located on the outer side of the frame 1. One end of the fastening chain 5 is fixedly connected to the frame 1, and the other end of the fastening chain 5 passes over the top of the pressure roller 32 and meshes with the transmission gear 22.

[0033] The above setup constitutes a simple, easy-to-use, reliable, and highly practical chain-type pipe cover fastening device. When fixing the cover, first, rotate the hand-controlled cam 41 clockwise to allow the roller shaft 3 to descend along the slotted hole 11, pulling the movable end of the fastening chain 5 out from between the pressure roller 32 and the transmission gear 22; then, place the cover 100 on the pipe 200, place the frame 1 on the cover 100, and allow the movable end of the fastening chain 5 to pass around the pipe 200 and be positioned between the pressure roller 32 and the transmission gear 22; next, rotate the hand-controlled cam 41 counterclockwise to allow the roller shaft 3 to rise along the slotted hole 11, and the pressure roller 32 will press the chain to tighten it. The fastening chain 5 engages with the transmission gear 22; then, with one hand supporting the frame 1 and the other hand repeatedly pushing and pulling the operating handle 9, until the fastening chain 5 is taut and the cover plate 100 is tightly pressed onto the pipe 200, thus completing the fixation of the cover plate 100; finally, the cover plate 100 is welded onto the pipe 200, and by rotating the hand-controlled cam 41 clockwise to make the roller shaft 3 fall down along the strip hole 11, the movable end of the fastening chain 5 can be pulled out from between the top pressure roller 32 and the transmission gear 22, thereby removing the frame 1 from the cover plate 100. This invention provides stable support and connection through the frame 1, reliable power transmission for tightening the fastening chain 5 through the gear shaft 2 and transmission gear 22, prevents the gear shaft 2 from rotating by the stop ratchet 23 and stop pawl 61, and improves the convenience of the tightening operation by the drive ratchet 24 and drive pawl 81. Simply pushing and pulling the operating handle 9 continuously rotates the gear shaft 2 clockwise, thereby continuously tightening the fastening chain 5 through the transmission gear 22. The roller shaft 3 and top-pressure roller 32 ensure reliable engagement between the transmission gear 22 and the fastening chain 5. The invention improves reliability by placing both ends of the roller shaft 3 into the slotted hole 11 and providing a cam shaft 4 and a hand-operated cam 41 that cooperates with the roller shaft 3. This allows the roller shaft 3 to move up and down as needed, providing space for the fastening chain 5 to loosen after the cover plate 100 is welded, as the roller shaft 3 and the top pressure roller 32 fall down. Because the roller shaft 3 and the top pressure roller 32 are located below the gear shaft 2 and the transmission gear 22, only a slight force is needed to disengage the fastening chain 5 from the transmission gear 5, improving operational convenience. The inclined arrangement of the slotted hole 11 facilitates the rotation of the hand-operated cam 41. Compared with existing technologies, this invention improves the stability and reliability of pipe cover fixing and allows for repeated use, avoiding resource waste. It should be noted that the aforementioned movable end refers to the other end of the fastening chain 5 relative to the fixed end.

[0034] As an optimization scheme, to improve the stability and balance of the structure, this specific embodiment symmetrically arranges two stop ratchet 23, bracket 6, and stop pawl 61; similarly, two drive ratchet 24, bushing 7, drive component 8, and drive pawl 81 are also symmetrically arranged. To improve the convenience of disassembly and assembly, this specific embodiment provides bushing 7 with sleeve 71 fixed to frame 1 and retaining ring 72 fixed to sleeve 71 by screws, and drive component 8 is fixed to card seat 83 by connecting plate 82 distributed circumferentially, and card seat 83 is provided with internal hexagonal groove, and the operating handle 9 adopts the following structure: including push-pull rod 91 and two wrenches 92, wherein the two ends of push-pull rod 91 are respectively fixedly connected to the upper ends of the two wrenches 92 by bolts, and the lower ends of the two wrenches 92 are respectively provided with hexagonal clasps, and the hexagonal clasps of the two wrenches 92 are respectively located in the internal hexagonal grooves of the two drive components 8. This design improves structural integrity and ease of operation, allowing for synchronous rotation of the two drive components 8 using only the push-pull rod 91. As an optimized solution, this specific embodiment fixes a paddle 411, a positioning ear plate 412, and a stop block 413 onto the manual control cam 41. A positioning pin 414 is installed on the positioning ear plate 412 and the frame 1 through positioning holes. The stop block 413 is configured to cooperate with the roller shaft 3. This structure allows for manual rotation of the manual control cam 41 via the paddle 411, improves operational convenience by cooperating with the roller shaft 3 via the stop block 413, and ensures structural stability by using the positioning ear plate 412 and positioning pin 414 for positioning, after the roller shaft 3 is lifted into place using the manual control cam 41. It should be noted that the positioning pin 414 should be removed before rotating the manual control cam 41 clockwise.

[0035] In a specific embodiment, the present invention employs the following structure for frame 1: it includes a base plate 12, a top plate 13, and two side plates 14. The base plate 12 is matched with the pipe cover to improve the tightness and stability of their connection. The two side plates 14 are arranged in parallel, with their upper and lower ends corresponding to the top plate 13 and fixedly connected to the base plate 12. This frame 1 features a simple structure, low cost, and easy fabrication. Based on the specific structure of frame 1, the present invention mounts both ends of gear shaft 2 onto the two side plates 14 via first bearings 21, fixes two brackets 6 to the inner sides of the two side plates 14, fixes two bushings 7 to the outer sides of the two side plates 14, and sets strip holes 11 and shaft holes on the two side plates 14. The two ends of roller shaft 3 are respectively clamped onto the two side plates 14 via strip holes 11, and the two ends of camshaft 4 are respectively clamped onto the two side plates 14 via shaft holes. In a specific embodiment, the present invention fixes a connecting rod 15 and a support rod 16 between the two side plates 14. Two ring platforms 151 are fixed to the middle of the connecting rod 15. One end of the fastening chain 5 is hooked onto the connecting rod 15 between the two ring platforms 151 via a hook 51, and the other end of the fastening chain 5 passes over the upper side of the support rod 16. This arrangement improves structural stability and the convenience of connecting the fastening chain 5.

[0036] In practical applications, this invention typically uses a three-row roller chain for the fastening chain 5, and correspondingly arranges three transmission gears 22 side by side to ensure structural stability and reliable fastening. To improve the tightness and reliability of the fit between the pressure roller 32 and the fastening chain 5, this invention provides retaining edges 321 on both sides of the pressure roller 32 to block the fastening chain 5. To achieve weight reduction and facilitate observation and operation, this invention also provides rectangular holes 131 on the top plate 13.

[0037] Based on the same concept, the present invention also provides a method for using a chain-type pipe cover fastening device, specifically including the following steps:

[0038] S1. Rotate the hand-controlled cam 41 clockwise to make the roller shaft 3 fall down along the strip hole 11, and then pull the movable end of the fastening chain 5 out from between the top pressure roller 32 and the transmission gear 22.

[0039] S2. Place the cover plate 100 on the pipe 200, place the frame 1 on the cover plate 100, and let the movable end of the fastening chain 5 pass around the pipe 200 and be placed between the top pressure roller 32 and the transmission gear 22.

[0040] S3. Rotate the hand-controlled cam 41 counterclockwise to make the roller shaft 3 rise along the strip hole 11, and squeeze it through the top pressure roller 32 to make the fastening chain 5 mesh with the transmission gear 22.

[0041] S4. With one hand supporting frame 1 and the other hand repeatedly pushing and pulling the operating handle 9 until the fastening chain 5 is taut and the cover plate 100 is tightly pressed onto the pipe 200. At this point, the cover plate 100 is fixed onto the pipe 200 by the fastening device.

[0042] S5. Fix the cover plate 100 to the pipe 200 by welding.

[0043] S6. Rotate the manual control cam 41 clockwise to make the roller shaft 3 fall down along the strip hole 11, then pull the movable end of the fastening chain 5 out from between the top pressure roller 32 and the transmission gear 22, and remove the frame 1 from the cover plate 100. This step removes the fastening device from the cover plate 100 for future use.

[0044] The chain-type pipe cover fastening device provided by this invention has the advantages of simple operation and high work efficiency.

[0045] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications made by those skilled in the art based on the technical solutions of the present invention without departing from the design concept of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A chain pipe cover fastening device characterized by, The utility model relates to a kind of hand-operated chain tightening device, including frame (1), gear shaft (2), roller shaft (3), camshaft (4) and fastening chain (5), the both ends of the gear shaft (2) are respectively installed on frame (1) by first bearing (21), the middle part of gear shaft (2) is fixed with transmission gear (22), gear shaft (2) is fixed with stop ratchet (23) on the inner side position of frame (1), gear shaft (2) is fixed with driving ratchet (24) on the outer side position of frame (1), the inner side of frame (1) is hinged with the stop ratchet pawl (61) matched with stop ratchet (23) by support (6), the outer side of frame (1) is clamped with driving piece (8) with the coaxial driving ratchet (24) of cylinder by shaft sleeve (7), the inner wall of driving piece (8) is hinged with the driving pawl (81) matched with driving ratchet (24), driving piece (8) is connected with operating handle (9), the roller shaft (3) is in the lower side of gear shaft (2), the both ends of roller shaft (3) are respectively clamped in the strip-shaped hole (11) of the oblique setting of frame (1), the middle part of roller shaft (3) is installed with the top pressure roller (32) matched with transmission gear (22) by second bearing (31), the camshaft (4) is in the lower side of roller shaft (3), the both ends of camshaft (4) are respectively clamped in the shaft hole of the setting of frame (1), the both ends of camshaft (4) and in the outer side position of frame (1) are respectively fixed with hand control cam (41) matched with roller shaft (3), one end of the fastening chain (5) is fixedly connected with frame (1), the other end of fastening chain (5) is passed from the upper side of top pressure roller (32) and is engaged with transmission gear (22); The stop ratchets (23), the supports (6) and the stop pawls (61) are respectively provided with two symmetrical ones; the drive ratchets (24), the shaft sleeves (7), the drive members (8) and the drive pawls (81) are also respectively provided with two symmetrical ones; the shaft sleeve (7) comprises a sleeve (71) fixed on the frame (1) and a blocking ring (72) fixed on the sleeve (71) by a screw; the drive member (8) is fixed with a clamping seat (83) by a circumferentially distributed connecting plate (82), the clamping seat (83) is provided with an internal hexagonal groove; the operating handle (9) comprises a push-pull rod (91) and two wrenches (92), the two ends of the push-pull rod (91) are respectively fixedly connected with the upper ends of the two wrenches (92) by bolts, the lower ends of the two wrenches (92) are respectively provided with hexagonal chucks, and the hexagonal chucks of the two wrenches (92) are correspondingly located in the internal hexagonal grooves of the two drive members (8); the hand control cam (41) is fixed with a dial piece (411), a positioning lug plate (412) and a blocking block (413), the positioning lug plate (412) and the frame (1) are installed with a positioning pin (414) through a positioning hole, and the blocking block (413) is arranged in cooperation with the roller shaft (3); the frame (1) comprises a bottom plate (12), a top plate (13) and two side plates (14), the two side plates (14) are arranged in parallel and are fixedly connected with the top plate (13) and the bottom plate (12) at the upper and lower ends, the strip-shaped hole (11) and the shaft hole are arranged on the two side plates (14), the fastening chain (5) is a three-row roller chain, and the transmission gear (22) is provided with three gears side by side.

2. The chain link pipe cover fastening device according to claim 1, characterized by, The bottom plate (12) is arranged in matching with the pipeline cover plate.

3. The chain link pipe cover fastening device according to claim 2, characterized by, The two ends of the gear shaft (2) are respectively installed on the two side plates (14) through the first bearings (21), the two supports (6) are fixed on the inner sides of the two side plates (14), and the two shaft sleeves (7) are fixed on the outer sides of the two side plates (14).

4. The chain link pipe cover fastening device according to claim 2, characterized by, The two ends of the roller shaft (3) are respectively clamped on the two side plates (14) through the strip-shaped holes (11), and the two ends of the cam shaft (4) are respectively clamped on the two side plates (14) through the shaft holes.

5. The chain link pipe cover fastening device according to claim 2, wherein The connecting rod (15) and the supporting rod (16) are fixed between the two side plates (14), the middle part of the connecting rod (15) is fixed with two ring tables (151), one end of the fastening chain (5) is hung on the connecting rod (15) between the two ring tables (151) through a hook (51), and the other end of the fastening chain (5) passes from the upper side of the supporting rod (16).

6. The chain link pipe cover fastening device according to claim 2, wherein The two sides of the top pressing roller (32) are respectively provided with blocking edges (321) for blocking the fastening chain (5), and the top plate (13) is provided with a rectangular hole (131).

7. A method of using the chain link pipe cover fastening device of claim 1, wherein, The method comprises the following steps: S1, rotate the hand control cam (41) clockwise to make the roller shaft (3) fall along the strip-shaped hole (11), and then pull out the movable end of the fastening chain (5) from between the top pressing roller (32) and the transmission gear (22); S2, put the cover plate (100) on the pipeline (200), put the frame (1) on the cover plate (100), and put the movable end of the fastening chain (5) between the top pressing roller (32) and the transmission gear (22) after winding around the pipeline (200); S3, rotate the hand control cam (41) counterclockwise to make the roller shaft (3) rise along the strip-shaped hole (11), and make the fastening chain (5) engage with the transmission gear (22) through the extrusion of the top pressing roller (32); S4, one hand holds the frame (1) and the other hand repeatedly pushes and pulls the handle (9) until the fastening chain (5) is taut and tightly extrudes the cover plate (100) on the pipeline (200); S5, fix the cover plate (100) on the pipeline (200) by welding; S6, rotate the hand control cam (41) clockwise to make the roller shaft (3) fall along the strip-shaped hole (11), then pull out the movable end of the fastening chain (5) from between the top pressing roller (32) and the transmission gear (22), and remove the frame (1) from the cover plate (100).

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