Chain type pipeline cover plate fastening device

Abstract

The utility model relates to a chain type pipeline cover plate fastening device which comprises a frame, a gear shaft, a roller shaft, a cam shaft and a fastening chain, a connecting rod and a supporting rod are arranged on the frame, the gear shaft is installed on the frame, a transmission gear, a stop ratchet wheel and a driving ratchet wheel are fixed on the gear shaft, a stop pawl matched with the stop ratchet wheel is hinged to the inner side of the frame, and the fastening chain is arranged on the cam shaft. A driving part is clamped on the outer side of the frame through a shaft sleeve, a driving pawl matched with the driving ratchet wheel is hinged to the driving part, the driving part is connected with an operation handle, the two ends of a roller shaft are clamped in strip-shaped holes in the frame respectively, a jacking roller matched with the transmission gear is installed on the roller shaft, and the two ends of a cam shaft are clamped in shaft holes in the frame respectively. A manual control cam matched with the roller shaft is fixed to the cam shaft, one end of the fastening chain is hung on the connecting rod through a hook, the other end of the fastening chain bypasses the upper side of the supporting rod and the upper side of the jacking roller and is meshed with the transmission gear, and the device has the advantages of being simple in structure, reliable in fixation and high in practicability.

Description

Technical Field

[0001] The utility model relates to a fastening device, in particular to a chain-type pipeline cover plate fastening device. Background Art

[0002] In the field of natural gas transmission and distribution, for damaged and leaking pipelines, cover plates are often used for leak repair. Before welding the cover plate to the pipeline, the cover plate needs to be tightly fixed on the pipeline to ensure the welding quality and leak repair effect. At present, in this field, steel straps are usually used to tie and fix the cover plate on the pipeline. Although this method can achieve the basic fixing purpose, there are problems of loose tying and poor reliability, which affect the welding quality and leak repair effect, and the straps cannot be reused, resulting in waste of resources. Content of the Utility Model

[0003] The purpose of the utility model is to provide a chain-type pipeline cover plate fastening device, which has the advantages of simple structure, convenient use, reliable fixation and strong practicability.

[0004] To solve the problems existing in the prior art, the utility model provides a chain-type pipeline cover plate fastening device, which comprises a frame, a gear shaft, a roller shaft, a cam shaft and a fastening chain. Connecting rods and support rods are arranged on the frame. Two ring platforms are fixed in the middle of the connecting rod. A roller is sleeved on the support rod. The two ends of the gear shaft are respectively installed on the frame through 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 position of the frame. A driving ratchet is fixed on the gear shaft at the outer side position of the frame. A stop pawl cooperating with the stop ratchet is hinged on the inner side of the frame through a bracket. A driving member which is cylindrical and coaxial with the driving ratchet is clamped on the outer side of the frame through a bushing. A driving pawl cooperating with the driving ratchet is hinged on the inner wall of the driving member. The driving member is connected with an operating handle. The roller shaft is located below the gear shaft. The two ends of the roller shaft are respectively clamped in the inclined strip-shaped holes arranged on the frame. A pressing roller cooperating with the transmission gear is installed in the middle of the roller shaft through a second bearing. The cam shaft is located below the roller shaft. The two ends of the cam shaft are respectively clamped in the shaft holes arranged on the frame. Manual control cams cooperating with the roller shaft are respectively fixed at the two ends of the cam shaft and at the outer side positions of the frame. One end of the fastening chain is hung on the connecting rod between the two ring platforms through a hook. The other end of the fastening chain bypasses the upper sides of the roller and the pressing roller and meshes with the transmission gear.

[0005] Furthermore, for the chain-type pipeline cover plate fastening device of the utility model, two stop ratchets, brackets and stop pawls are respectively arranged symmetrically; two driving ratchets, bushings, driving members and driving pawls are also respectively arranged symmetrically.

[0006] Further, for a chain-type pipe cover fastening device of the present utility model, the bushing includes a sleeve fixed on the frame and a retaining ring fixed on the sleeve by screws. The driving member is fixed with a clamping seat through circumferentially distributed connecting plates. The clamping seat is provided with an internal hexagonal groove. The operating handle includes a push-pull rod and two wrenches. The two ends of the push-pull rod are respectively fixedly connected to the upper ends of the two wrenches through bolts. The lower ends of the two wrenches are respectively provided with hexagonal chucks, and the hexagonal chucks of the two wrenches are correspondingly located in the internal hexagonal grooves of the two driving members.

[0007] Further, for a chain-type pipe cover fastening device of the present utility model, a dial, a positioning ear plate and a stop block are fixed on the manual control cam. The positioning ear plate and the frame are provided with a positioning pin through a positioning hole, and the stop block is arranged in cooperation with the roller shaft.

[0008] Further, for a chain-type pipe cover fastening device of the present utility model, the frame includes a bottom plate, a top plate and two side plates. The bottom plate is matched with the pipe cover. The two side plates are arranged in parallel and their upper and lower ends are correspondingly fixedly connected to the top plate and the bottom plate. The connecting rod and the support rod are fixed between the two side plates.

[0009] Further, for a chain-type pipe cover fastening device of the present utility model, the two ends of the gear shaft are respectively installed on the two side plates through the first bearings. Two brackets are correspondingly fixed on the inner sides of the two side plates, and two bushings are correspondingly fixed on the outer sides of the two side plates.

[0010] Further, for a chain-type pipe cover fastening device of the present utility model, the strip holes and shaft holes are arranged on the two side plates. The two ends of the roller shaft are respectively clamped on the two side plates through the strip holes, and the two ends of the cam shaft are respectively clamped on the two side plates through the shaft holes.

[0011] Further, for a chain-type pipe cover fastening device of the present utility model, the fastening chain is a three-row roller chain. Three transmission gears are arranged side by side. The two sides of the pressing roller are respectively provided with retaining edges for blocking the fastening chain, and a rectangular hole is provided on the top plate.

[0012] Compared with the prior art, the chain-type pipe cover fastening device of the present utility model has the following advantages: By providing a frame, a gear shaft, a roller shaft, a cam shaft and a fastening chain, the present utility model provides a connecting rod and a support rod on the frame, fixes two ring platforms in the middle of the connecting rod, slews a roller on the support rod, respectively installs the two ends of the gear shaft on the frame through a first bearing, fixes a transmission gear in the middle of the gear shaft, fixes a stop ratchet on the gear shaft and at the inner position of the frame, fixes a driving ratchet on the gear shaft and at the outer position of the frame, hinges a stop pawl cooperating with the stop ratchet on the inner side of the frame through a bracket, slews a driving member which is tubular and coaxial with the driving ratchet on the outer side of the frame through a bushing, hinges a driving pawl cooperating with the driving ratchet on the inner wall of the driving member, and connects the driving member to an operating handle, sets the roller shaft at the lower side position of the gear shaft, respectively slews the two ends of the roller shaft in strip-shaped holes obliquely arranged on the frame, and installs a pressing roller cooperating with the transmission gear on the middle of the roller shaft through a second bearing, sets the cam shaft at the lower side position of the roller shaft, respectively slews the two ends of the cam shaft in shaft holes arranged on the frame, respectively fixes a manually controlled cam cooperating with the roller shaft at the two ends of the cam shaft and at the outer position of the frame, hangs one end of the fastening chain on the connecting rod between the two ring platforms through a hook, and makes the other end of the fastening chain bypass the upper sides of the roller and the pressing roller and mesh with the transmission gear. Thus, a chain-type pipe cover fastening device with simple structure, convenient use, reliable fixation and strong practicability is formed. When fixing the cover plate, first, rotate the manually controlled cam clockwise to make the roller shaft drop along the strip-shaped hole, and then draw out the movable end of the fastening chain from between the pressing roller and the transmission gear; then place the cover plate on the pipe, place the frame on the cover plate, and make the movable end of the fastening chain bypass the pipe and then place it between the pressing roller and the transmission gear; then rotate the manually controlled cam counterclockwise to make the roller shaft rise along the strip-shaped hole, and make the fastening chain mesh with the transmission gear by extrusion of the pressing roller; then hold the frame with one hand and repeatedly push and pull the operating handle with the other hand until the fastening chain is tightened and the cover plate is tightly pressed on the pipe, and thus the fixation of the cover plate is completed; finally, weld the cover plate on the pipe, and rotate the manually controlled cam clockwise to make the roller shaft drop along the strip-shaped hole, and then the movable end of the fastening chain can be drawn out from between the pressing roller and the transmission gear, and further the frame can be removed from the cover plate.The utility model provides stable support and connection by setting a frame, connecting rods and support rods, improves the stable reliability of connection by setting two annular platforms and matching hooks, reduces the friction on the fastening chain by setting rollers, improves the stability of the fastening operation, provides a reliable driving force for tightening the fastening chain by setting a gear shaft and a transmission gear, prevents the gear shaft from rotating back by setting a stop ratchet and a stop pawl, improves the convenience of the fastening operation by setting a driving ratchet and a driving pawl. Only by repeatedly pushing and pulling the operating handle can the gear shaft continuously rotate clockwise, and then the fastening chain is continuously tightened through the transmission gear. The reliability of the meshing between the transmission gear and the fastening chain is ensured by setting a roller shaft and a pressing roller. By placing both ends of the roller shaft in strip holes and setting a camshaft and a manual control cam that cooperate with the roller shaft, the roller shaft can be moved up and down as needed, so as to provide space for loosening the fastening chain when the roller shaft and the pressing roller drop after the cover plate is welded. Since the roller shaft and the pressing roller are arranged on the lower side of the gear shaft and the transmission gear, only a little force is needed to make the fastening chain disengage from the transmission gear when loosening. Compared with the prior art, the chain-type pipeline cover plate fastening device provided by the utility model not only improves the stable reliability of the pipeline cover plate fixation, but can also be reused multiple times, avoiding resource waste.

[0013] The following further elaborates in detail on a chain-type pipeline cover plate fastening device of the utility model with reference to the specific embodiments shown in the accompanying drawings. Description of the Drawings

[0014] Figure 1 is the front view of a chain-type pipeline cover plate fastening device of the utility model;

[0015] Figure 2 is Figure 1 the partial enlarged view at position A in

[0016] Figure 3 is the partial left view of a chain-type pipeline cover plate fastening device of the utility model;

[0017] Figure 4 is the partial axonometric Figure 1 ;

[0018] Figure 5 is the partial axonometric Figure 2 ;

[0019] Figure 6 is Figure 1 the view B-B in

[0020] Figure 7 is Figure 3 the view C-C in

[0021] Figure 8 Front elevation view of the use state of a chain - type pipe cover fastening device of the present utility model

[0022] Figure 9 Axonometric view of the use state of a chain - type pipe cover fastening device of the present utility model Specific implementation manner

[0023] First of all, it should be noted that the orientation words such as up, down, left, right, front, and back in the present utility model are only described according to the attached drawings for the convenience of understanding, and do not limit the technical solution and the scope of the claimed protection of the present utility model

[0024] As Figures 1 to 9 shown, the specific implementation manner of a chain - type pipe cover fastening device of the present utility model includes a frame 1, a gear shaft 2, a roller shaft 3, a cam shaft 4, and a fastening chain 5. Connecting rods 11 and support rods 12 are provided on the frame 1. Two ring platforms 111 are fixed in the middle of the connecting rod 11, and a roller 121 is sleeved on the support rod 12. The two ends of the gear shaft 2 are respectively installed on the frame 1 through 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 located inside the frame 1, and a driving ratchet 24 is fixed on the gear shaft 2 and located outside the frame 1. A stop pawl 61 that cooperates with the stop ratchet 23 is hinged inside the frame 1 through a bracket 6. A driving member 8 that is cylindrical and coaxial with the driving ratchet 24 is clamped on the outside of the frame 1 through a bushing 7. A driving pawl 81 that cooperates with the driving ratchet 24 is hinged on the inner wall of the driving member 8, and the driving member 8 is connected to an operating handle 9. The roller shaft 3 is arranged below the gear shaft 2, and the two ends of the roller shaft 3 are respectively clamped in strip - shaped holes 13 that are obliquely arranged on the frame 1. A pressing roller 32 that cooperates with the transmission gear 22 is installed in the middle of the roller shaft 3 through a second bearing 31. The cam shaft 4 is arranged below the roller shaft 3, and the two ends of the cam shaft 4 are respectively clamped in shaft holes provided on the frame 1, and manual control cams 41 that cooperate with the roller shaft 3 are respectively fixed at the two ends of the cam shaft 4 and located outside the frame 1. Among them, one end of the fastening chain 5 is hung on the connecting rod 11 between the two ring platforms 111 through a hook 51, and the other end of the fastening chain 5 bypasses the upper sides of the roller 121 and the pressing roller 32 and meshes with the transmission gear 22

[0025] Through the above settings, a chain-type pipe cover fastening device with a simple structure, convenient use, reliable fixation, and strong practicability is formed. When fixing the cover plate, first, rotate the manual control cam 41 clockwise to make the roller shaft 3 drop along the strip hole 13, and then pull out the movable end of the fastening chain 5 from between the pressing roller 32 and the transmission gear 22; then 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 bypass the pipe 200 and then be placed between the pressing roller 32 and the transmission gear 22; then rotate the manual control cam 41 counterclockwise to make the roller shaft 3 rise along the strip hole 13, and through the extrusion of the pressing roller 32, make the fastening chain 5 engage with the transmission gear 22; then hold the frame 1 with one hand and repeatedly push and pull the operating handle 9 with the other hand until the fastening chain 5 is tightened and the cover plate 100 is tightly pressed on the pipe 200, and thus the fixation of the cover plate 100 is completed; finally, weld the cover plate 100 to the pipe 200, and rotate the manual control cam 41 clockwise to make the roller shaft 3 drop along the strip hole 13, then the movable end of the fastening chain 5 can be pulled out from between the pressing roller 32 and the transmission gear 22, and then the frame 1 can be removed from the cover plate 100. The utility model provides a stable support and connection function by setting the frame 1, the connecting rod 11, and the support rod 12, improves the stable reliability of the connection by setting two annular platforms 111 and matching hooks 51, reduces the friction on the fastening chain 5 by setting the roller 121, improves the stability of the fastening operation, provides a reliable driving force for tightening the fastening chain 5 by setting the gear shaft 2 and the transmission gear 22, prevents the gear shaft 2 from rotating back by setting the stop ratchet 23 and the stop pawl 61, improves the convenience of the fastening operation by setting the driving ratchet 24 and the driving pawl 81, only need to repeatedly push and pull the operating handle 9 to make the gear shaft 2 continuously rotate clockwise, and then make the fastening chain 5 continuously tighten through the transmission gear 22, ensures the reliable meshing of the transmission gear 22 and the fastening chain 5 by setting the roller shaft 3 and the pressing roller 32, by placing both ends of the roller shaft 3 in the strip hole 13, and setting the camshaft 4 and the manual control cam 41 cooperating with the roller shaft 3, the roller shaft 3 can be moved up and down as needed, so as to provide space for loosening the fastening chain 5 when the roller shaft 3 and the pressing roller 32 drop after the cover plate 100 is welded. Because the roller shaft 3 and the pressing roller 32 are arranged below the gear shaft 2 and the transmission gear 22, when loosening, only a little force is needed to make the fastening chain 5 disengage from the transmission gear 5, which improves the operation convenience. By setting the strip hole 13 to be inclined, it is beneficial to rotate the manual control cam 41. Compared with the prior art, the utility model not only improves the stable reliability of the pipe cover fixation but also can be reused multiple times, avoiding resource waste. It should be noted that the above-mentioned movable end refers to the other end of the fastening chain 5 relative to the fixed end, that is, the end far from the hook 51.

[0026] As an optimization solution, to improve the stability and balance of the structure, two stop ratchets 23, two brackets 6, and two stop pawls 61 are symmetrically arranged in this specific embodiment. Similarly, two drive ratchets 24, two bushings 7, two drive members 8, and two drive pawls 81 are also symmetrically arranged. To improve the convenience of disassembly and assembly, in this specific embodiment, the bushing 7 is provided with a sleeve 71 fixed to the frame 1 and a retaining ring 72 fixed to the sleeve 71 by screws. The drive member 8 is fixed with a clamping seat 83 through circumferentially distributed connecting plates 82, and an internal hexagonal groove is provided on the clamping seat 83. The operating handle 9 is structured as follows: it includes a push rod 91 and two wrenches 92. The two ends of the push rod 91 are respectively fixedly connected to the upper ends of the two wrenches 92 by bolts. Hexagonal chucks are provided at the lower ends of the two wrenches 92, and the hexagonal chucks of the two wrenches 92 are respectively located in the internal hexagonal grooves of the two drive members 8. This setting improves the structural integrity and operation convenience, and only by using the push rod 91 can the two drive members 8 be synchronously rotated. As an optimization solution, in this specific embodiment, a dial 411, a positioning ear plate 412, and a stop block 413 are fixed on the manual control cam 41, and a positioning pin 414 is installed through positioning holes on the positioning ear plate 412 and the frame 1. The stop block 413 is arranged in cooperation with the roller shaft 3. This structure can perform a manual rotation operation on the manual control cam 41 by setting the dial 411, improves the operation convenience by setting the stop block 413 to cooperate with the roller shaft 3, and ensures the structural stability after the roller shaft 3 is lifted in place by using the manual control cam 41 through the positioning of the positioning ear plate 412 and the positioning pin 414. It should be noted that the positioning pin 414 should be withdrawn before rotating the manual control cam 41 clockwise.

[0027] As a specific implementation manner, the utility model makes the frame 1 adopt the following structure: including a bottom plate 14, a top plate 15 and two side plates 16. Among them, the bottom plate 14 is arranged in a matching manner with the pipe cover plate to improve the tightness and stability of the combination of the two. The two side plates 16 are arranged in parallel, and their upper and lower ends are respectively fixed to the top plate 15 and the bottom plate 14. The connecting rod 11 and the support rod 12 are fixed between the two side plates 16. The frame 1 arranged in this way has the characteristics of simple structure, low cost and easy preparation. Based on the specific structure of the frame 1, the two ends of the gear shaft 2 of the utility model are respectively installed on the two side plates 16 through the first bearings 21. The two brackets 6 are correspondingly fixed on the inner sides of the two side plates 16. The two bushings 7 are correspondingly fixed on the outer sides of the two side plates 16. The strip holes 13 and the shaft holes are respectively arranged on the two side plates 16. Among them, the two ends of the roller shaft 3 are respectively clamped on the two side plates 16 through the strip holes 13, and the two ends of the cam shaft 4 are respectively clamped on the two side plates 16 through the shaft holes. As a specific implementation manner, the utility model makes the fastening chain 5 adopt a three-row roller chain, and correspondingly arranges three drive gears 22 side by side to ensure the structural stability and fastening reliability. To improve the tight and reliable cooperation between the pressing roller 32 and the fastening chain 5, the utility model respectively arranges the blocking edges 321 for blocking the fastening chain 5 on both sides of the pressing roller 32. To achieve the purpose of weight reduction and facilitate observation and operation, the utility model also arranges a rectangular hole 151 on the top plate 15.

[0028] For the convenience of those skilled in the art to understand, the following briefly describes the use process of the chain-type pipe cover plate fastening device:

[0029] S1. After the roller shaft 3 drops along the strip hole 1 by clockwise rotating the manual control cam 41, the movable end of the fastening chain 5 is drawn out from between the pressing roller 32 and the drive gear 22.

[0030] 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 bypass the pipe 200 and then be placed between the pressing roller 32 and the drive gear 22.

[0031] S3. Counterclockwise rotate the manual control cam 41 to make the roller shaft 3 rise along the strip hole 1, and squeeze through the pressing roller 32 to make the fastening chain 5 engage with the drive gear 22.

[0032] S4. Hold the frame 1 with one hand and repeatedly push and pull the operation handle 9 with the other hand until the fastening chain 5 is tightened and the cover plate 100 is tightly pressed on the pipe 200. Thus, the cover plate 100 is fixed on the pipe 200 through the fastening device.

[0033] S5. Fix the cover plate 100 on the pipe 200 by welding.

[0034] S6. After the hand-controlled cam 41 is rotated clockwise to make the roller shaft 3 drop along the strip-shaped hole 13, the movable end of the fastening chain 5 is withdrawn from between the pressing roller 32 and the transmission gear 22, and the frame 1 is removed from the cover plate 100. Through this step, the fastening device can be released from the cover plate 100 for the next use.

[0035] The above embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of protection of the present invention. Without departing from the design concept of the present invention, various deformations made by those skilled in the art based on the technical solution of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A chain-type pipe cover fastening device, characterized in that: The invention comprises a frame (1), a gear shaft (2), a roller shaft (3), a cam shaft (4) and a fastening chain (5); a connecting rod (11) and a supporting rod (12) are provided on the frame (1); two ring platforms (111) are fixed in the middle of the connecting rod (11); a roller (121) is sleeved on the supporting rod (12); both ends of the gear shaft (2) are respectively mounted on the frame (1) through a first bearing (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) at the inner position of the frame (1), a driving ratchet (24) is fixed on the gear shaft (2) at the outer position of the frame (1), a stop ratchet (61) cooperating with the stop ratchet (23) is hinged on the inner side of the frame (1) through a bracket (6), a cylindrical driving member (8) coaxial with the driving ratchet (24) is clamped on the outer side of the frame (1) through a shaft sleeve (7), and a driving member (8) is hinged on the inner wall of the driving member (8) The ratchet (24) cooperates with the driving pawl (81), the driving member (8) is connected with the operating handle (9), the roller shaft (3) is located on the lower side of the gear shaft (2), the two ends of the roller shaft (3) are respectively clamped in the strip holes (13) arranged obliquely on the frame (1), the middle part of the roller shaft (3) is installed with a top pressure roller (32) that cooperates with the transmission gear (22) through the second bearing (31), the cam shaft (4) is located on the lower side of the roller shaft (3), and the cam shaft (4) is installed on the lower side of the roller shaft (3). ) are respectively clamped in the shaft holes provided on the frame (1); the two ends of the cam shaft (4) are respectively fixed with manual cams (41) matched with the roller shaft (3) at the outer positions of the frame (1); one end of the fastening chain (5) is hung on the connecting rod (11) between the two ring platforms (111) through a hook (51); the other end of the fastening chain (5) is passed through the upper side of the roller (121) and the top pressure roller (32) and is engaged with the transmission gear (22).

2. The chain-type pipe cover fastening device according to claim 1, characterized in that: The stopping ratchet (23), the bracket (6) and the stopping pawl (61) are respectively provided with two symmetrical ones; the driving ratchet (24), the shaft sleeve (7), the driving member (8) and the driving pawl (81) are also respectively provided with two symmetrical ones.

3. The chain-type pipeline cover fastening device according to claim 2, characterized in that: The shaft sleeve (7) includes a sleeve (71) fixed on the frame (1) and a retaining ring (72) fixed on the sleeve (71) by screws. The driving member (8) is fixed with a clamping seat (83) through a connecting plate (82) distributed along the circumference. The clamping seat (83) is provided with an inner hexagonal groove. The operating handle (9) includes a push-pull rod (91) and two wrenches (92). The two ends of the push-pull rod (91) are fixedly connected to the upper ends of the two wrenches (92) by bolts respectively. The lower ends of the two wrenches (92) are respectively provided with hexagonal clamps. The hexagonal clamps of the two wrenches (92) are correspondingly located in the inner hexagonal grooves of the two driving members (8).

4. The chain-type pipeline cover fastening device according to claim 3, characterized in that: A paddle (411), a positioning ear plate (412) and a stopper (413) are fixed on the manual cam (41); a positioning pin (414) is installed on the positioning ear plate (412) and the frame (1) through a positioning hole; and the stopper (413) is arranged in cooperation with the roller shaft (3).

5. The chain-type pipeline cover fastening device according to claim 4, characterized in that: The frame (1) comprises a bottom plate (14), a top plate (15) and two side plates (16); the bottom plate (14) is matched with the pipeline cover plate; the two side plates (16) are arranged in parallel and their upper and lower ends are fixedly connected to the top plate (15) and the bottom plate (14) respectively; the connecting rod (11) and the supporting rod (12) are fixed between the two side plates (16).

6. The chain-type pipeline cover fastening device according to claim 5, characterized in that: The two ends of the gear shaft (2) are respectively mounted on the two side plates (16) through the first bearings (21), the two brackets (6) are respectively fixed on the inner sides of the two side plates (16), and the two shaft sleeves (7) are respectively fixed on the outer sides of the two side plates (16).

7. The chain-type pipeline cover fastening device according to claim 5, characterized in that: The strip holes (13) and the shaft holes are provided on the two side plates (16); the two ends of the roller shaft (3) are respectively clamped on the two side plates (16) through the strip holes (13); and the two ends of the cam shaft (4) are respectively clamped on the two side plates (16) through the shaft holes.

8. The chain-type pipeline cover fastening device according to claim 5, characterized in that: The fastening chain (5) is a three-row roller chain, three transmission gears (22) are arranged side by side, both sides of the top pressure roller (32) are respectively provided with a blocking edge (321) for blocking the fastening chain (5), and a rectangular hole (151) is provided on the top plate (15).

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