Hand-operated pipeline butt joint device

Abstract

The invention relates to the technical field of pipeline butt joint devices, in particular to a hand-operated pipeline butt joint device which comprises a connecting frame, a locking chain, a self-locking type manual winch and a connecting component, the connecting frame is used for being attached to the end, close to a loading seal, of a first cast iron pipe, the locking chain surrounds the outer circumference of the first cast iron pipe, and the self-locking type manual winch is arranged on the connecting component. The self-locking type manual winch is arranged on the connecting frame, connected with the connecting frame through a hinge bolt and used for fastening the connecting frame to the first cast iron pipe, the connecting component is arranged on the second cast iron pipe, a steel wire rope is wound on the self-locking type manual winch, the steel wire rope of the self-locking type manual winch is connected with the connecting component, and the self-locking type manual winch is arranged on the connecting frame. And the pull rod is fixedly connected to one end of the connecting frame through a bolt and used for pulling the second cast iron pipe. According to the hand-operated pipeline butt joint device, butt joint of pipelines is facilitated, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline butt joint devices, and in particular to a hand-cranked pipeline butt joint device. Background Art

[0002] During the installation of the cast iron pipe, the second cast iron pipe connected to it is difficult to insert due to the large interference between the inner circular hole sealed at the pipe joint and the outer diameter of the cast iron pipe. The operator will connect the hand chain hoist to the first cast iron pipe, hook the hook in the hand chain hoist with the lock on the second cast iron pipe to be inserted, and the operator will pull the small ring chain to retract the hook, pull the second cast iron pipe to move, pull the two cast iron pipes together, and force the cylinder mouth end of the second cast iron pipe through the seal at one end of the first cast iron pipe to the designated position, so that the cast iron pipe can be installed in place and the seal between the cast iron pipes can be leak-proof.

[0003] However, the hand chain hoist is placed horizontally, and pulling the small chain is not smooth, which consumes more physical energy, and the efficiency of pipe installation is low. The reason for these problems is that during the pulling of the two cast iron pipes, the steel wire locks hooked on both ends of the hand chain hoist need to be tightened from a loose state before the two cast iron pipes can be pulled together, which requires pulling the small chain of the hand chain hoist for a long time. Since the hand chain hoist is placed horizontally, pulling the small chain is not smooth, which consumes more physical energy. In addition, the hand chain hoist must be lifted frequently when walking, resulting in high work intensity and low efficiency of pipe installation. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a hand-cranked pipe docking device, which is convenient for docking pipes and reduces the labor intensity of personnel.

[0005] The hand-operated pipe docking device of the embodiment of the present invention comprises a first cast iron pipe and a second cast iron pipe to be docked, and comprises: a connecting frame, the connecting frame is used to abut against one end of the first cast iron pipe adjacent to the sealing; a locking chain, the locking chain is surrounded by the outer circumference of the first cast iron pipe and is connected to the connecting frame by hinge bolts, and is used to fasten the connecting frame to the first cast iron pipe; a self-locking manual winch and a connecting component, the connecting component is arranged on the second cast iron pipe, a steel wire rope is wound around the self-locking manual winch, and the steel wire rope of the self-locking manual winch is connected to the connecting component,

[0006] The self-locking manual winch is arranged on the connecting frame and is fixed to one end of the connecting frame by bolts, and is used for pulling the second cast iron pipe.

[0007] The hand-operated pipe docking device of the embodiment of the present invention facilitates pipe docking and reduces the labor intensity of personnel.

[0008] In some embodiments, the connecting component includes a U-shaped ring and a connecting piece, the U-shaped ring has an opening, the connecting piece passes through both ends of the opening of the U-shaped ring to connect the U-shaped ring end to end to form a locking buckle, the steel wire rope passes between the U-shaped ring and the connecting piece, and at least part of the steel wire rope is wrapped around the second cast iron pipe and connected to the connecting piece.

[0009] In some embodiments, the connecting frame includes: a connecting plate, four first through holes are arranged at the four corners of the connecting plate, the positions of the first through holes coincide with the positions of the base holes of the self-locking manual winch, and are used to insert bolts to fix the self-locking manual winch; two second through holes are arranged at both ends of the middle part, which are used to pass the hinge bolts and connect with the locking chain; a limit plate, which is arranged on the bottom surface of the connecting plate and is used to clamp the outer cylindrical surface of the first cast iron pipe.

[0010] In some embodiments, the connecting plate and the limiting plate are integrally formed.

[0011] In some embodiments, the hand-cranked pipe docking device further includes a limiting groove provided at the outer end of the limiting plate, and the limiting groove is semicircular or V-shaped.

[0012] In some embodiments, the locking chain includes: a round link chain; and hinge bolts, wherein the hinge bolts are arranged at both ends of the round link chain and are used to fasten the connecting frame to the first cast iron pipe.

[0013] In some embodiments, the hinge bolt includes a chain link, wherein the two chain links are arranged at both ends of the circular link chain for connecting a screw rod; and a screw rod, wherein the screw rod is arranged at one end of the chain link for threaded connection with a nut.

[0014] In some embodiments, the hand-operated pipe docking device further comprises a clamping member, the clamping member is sleeved on the second cast iron pipe, and at least a portion of the clamping member is connected to a steel wire rope.

[0015] In some embodiments, the hand-cranked pipe docking device further includes a friction pad, which is disposed between the connecting plate and the first cast iron pipe.

[0016] In some embodiments, the friction pad may be made of any one of nitrile rubber, chloroprene rubber or fluororubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a hand-operated pipe docking device according to an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of a U-shaped ring according to an embodiment of the present invention.

[0019] Figure 3Schematic diagram of a self-locking hand winch according to an embodiment of the present invention.

[0020] Figure 4 Schematic diagram of a connecting frame according to an embodiment of the present invention.

[0021] Figure 5 Schematic diagram of a connecting plate according to an embodiment of the present invention.

[0022] Figure 6 Schematic diagram of a screw rod according to an embodiment of the present invention.

[0023] Figure 7 Schematic diagram of a hinge bolt according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] A first cast iron pipe 1, a hand-cranked pipe docking device 2, a second cast iron pipe 3, a U-shaped ring 4, a locking chain 5, a self-locking hand-cranked winch 6, a connecting frame 7, an articulated bolt 8, a round link chain 9, a bolt 10, a steel wire rope 11, a first through hole 12, a connecting plate 13, a second through hole 14, a limiting plate 15, a chain link 16, a screw 17, a nut 18, and a limiting groove 19. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0027] The hand-operated pipe docking device 2 of the embodiment of the present invention comprises a first cast iron pipe 1 and a second cast iron pipe 3 to be docked, comprising: a locking chain 5, a connecting frame 7, a self-locking manual winch 6 and a connecting component, wherein the connecting frame 7 is used to be close to the end of the first cast iron pipe 1 adjacent to the sealing, the locking chain 5 surrounds the outer circumference of the first cast iron pipe 1, and is connected to the connecting frame 7 by a hinge bolt 8, and is used to fasten the connecting frame 7 to the first cast iron pipe 1, the connecting component is arranged on the second cast iron pipe 3, a steel wire rope 11 is wound around the self-locking manual winch, and the steel wire rope 11 of the self-locking manual winch is connected to the connecting component,

[0028] The self-locking manual winch is arranged on the connecting frame 7 and is fixed to one end of the connecting frame 7 by bolts 10 , and is used for pulling the second cast iron pipe 3 .

[0029] Specifically, the connecting frame 7 and the self-locking manual winch 6 are placed against the adjacent sealed end of the first cast iron pipe 1, that is, adjacent to the boss portion of the first cast iron pipe 1, and the hinge bolt 8 at the other end of the locking chain 5 is also inserted into the second through hole 14 and firmly connected with the nut 18, so that the connecting frame 7 and the self-locking manual winch 6 are fastened to the first cast iron pipe 1, and the steel wire rope 11 on the self-locking manual winch 6 is wrapped around the second cast iron pipe 3 through the lock formed by the connection of the U-shaped lifting ring 4 on the connecting component, and the handle is shaken by hand to rotate the winch to drive the steel wire rope 11 to tighten the second cast iron pipe 3, and drive the second cast iron pipe 3 to move, so that the pipe mouth is inserted into the seal of the end of the first cast iron pipe 1, thereby realizing the butt connection of the cast iron pipes.

[0030] The self-locking manual winch 6 is arranged on the side of the connecting frame 7 away from the first cast iron pipe 1. The locking chain 5 surrounds the outer circumference of the first cast iron pipe 1 and is connected to the connecting frame 7 through a hinge bolt 8, so as to fasten the connecting frame 7 to the first cast iron pipe 1.

[0031] The hand-operated pipe docking device of the embodiment of the present invention is provided with a connecting frame 7, and a self-locking manual winch 6 is provided on the connecting frame 7, so as to facilitate the movement of the second cast iron pipe 3 so that the pipe mouth thereof penetrates into the seal of the end of the first cast iron pipe 1, thereby realizing the butt connection of the cast iron pipes. At the same time, a locking chain 5 is provided, which surrounds the outer circumference of the first cast iron pipe 1 and is connected to the connecting frame 7 by a hinge bolt 8, and is used to fasten the connecting frame 7 to the first cast iron pipe 1, so as to facilitate the butt connection of the pipes and reduce the labor intensity of personnel.

[0032] In some embodiments, the connecting component includes a U-shaped ring and a connector, the U-shaped ring has an opening, the connector passes through both ends of the U-shaped ring opening to connect the U-shaped ring end to end to form a lock, the wire rope 11 passes between the U-shaped ring and the connector, and at least part of the wire rope 11 is wound around the second cast iron pipe 3 and connected to the connector. The wire rope 11 on the self-locking manual winch 6 is wound around the second cast iron pipe 3 through the lock formed by the connection of the U-shaped lifting ring 4. The handle is cranked by hand to rotate the winch to drive the wire rope 11 to tighten the second cast iron pipe 3, and drive the second cast iron pipe 3 to move, so that the pipe mouth penetrates into the seal of the end of the first cast iron pipe 1, and the cast iron pipe is connected to the end.

[0033] The connecting piece can be a bolt so that the connecting piece is connected to the two ends of the U-shaped ring opening to form a lock or clamp form, so that the wire rope can be connected to the connecting piece after being wrapped around the second cast iron pipe 3, so as to facilitate the subsequent movement and docking of the second cast iron pipe 3.

[0034] In some embodiments, the connecting frame 7 includes: a connecting plate 13, four first through holes 12 are arranged at the four corners of the connecting plate 13, the positions of the first through holes 12 coincide with the positions of the bottom holes of the self-locking manual winch, and are used to penetrate the bolts 10 to be fixedly connected with the self-locking manual winch; two second through holes 14 are arranged at both ends of the middle part thereof, and are used to penetrate the hinge bolts 8 to be connected with the locking chain 5;

[0035] The limiting plate 15 is arranged on the bottom surface of the connecting plate 13 and is used for clamping the outer circumferential surface of the first cast iron pipe 1 .

[0036] After the steel plate is cut into the specified size, it is bent into the cross-section shape of the channel steel, the first through hole 12 and the second through hole 14 are drilled at the specified position in the connecting plate 13, and the limiting groove 19 is milled on the bottom surface of the limiting plate 15, which constitutes the connecting frame 7. The self-locking manual winch 6 is placed on the connecting frame 7, and four bolts 10 are passed through the first through hole 12 and the through holes corresponding to the bottom surface of the self-locking manual winch 6, and the bolts 10 are tightened to fix the self-locking manual winch 6 on the connecting frame 7; the two ends of the round link chain 9 are connected with articulated bolts 8, and the articulated bolts 8 are welded with screws 17 at the outer ends of the two chain links 16 at the two ends of the round link chain 9, and the articulated bolts 8 at one end are inserted into the second through hole 14 at one end, and the nut 18 is threaded. Then the connecting frame 7 is fixed to facilitate the subsequent installation of the self-locking manual winch 6.

[0037] Furthermore, the connecting plate 13 and the limiting plate 15 are integrally formed to improve the structural strength of the connecting plate 13 and the limiting plate 15 .

[0038] In some embodiments, in the hand-cranked pipe docking device 2, a limiting groove is provided at the outer end of the limiting plate 15, and the shape of the limiting groove is semicircular or V-shaped.

[0039] The shape of the limiting groove cooperates with the first cast iron pipe 3 to improve the stability and safety of the connecting frame 7 being fixed on the first cast iron pipe 3.

[0040] In some embodiments, the locking chain 5 includes a round link chain 9 and hinge bolts 8 , and the hinge bolts 8 are arranged at both ends of the round link chain 9 for fastening the connecting frame 7 to the first cast iron pipe 1 .

[0041] By setting up a circular link chain and an articulated bolt, it is convenient to fix the connecting frame 7 on the first cast iron pipe. The articulated bolt 8 includes a chain link 16. Two chain links 16 are set at both ends of the circular link chain 9 for connecting a screw rod 17. The screw rod 17 is set at one end of the chain link 16 for threaded connection with a nut 18.

[0042] In some embodiments, the hand-operated pipe docking device 2 further includes a clamp (not shown), which is sleeved on the second cast iron pipe 3 , and at least a portion of the clamp is connected to the steel wire rope 11 .

[0043] The clamp can facilitate the pulling of the second cast iron pipe 3 by the steel wire rope, so as to facilitate the subsequent docking.

[0044] In some embodiments, the hand-operated pipe docking device 2 further includes a friction pad (not shown), which is disposed between the connecting plate 13 and the first cast iron pipe 1. The friction pad can increase the friction between the connecting plate 13 and the cast iron pipe 1, thereby improving the stability and safety of the self-locking manual winch 6 on the connecting frame 13.

[0045] Furthermore, the material of the friction pad can be any one of nitrile rubber, chloroprene rubber or fluororubber. Furthermore, the friction pad has a certain wear resistance, and avoids the friction between the connecting frame 13 and the first cast iron pipe being too small to cause unstable fixation. Alternatively, the friction pad is sandblasted, scraped) or added with certain materials (such as asphalt, graphite) to increase the friction between the connecting frame 13 and the first cast iron pipe 1.

[0046] Reference below Figures 1 to 7 The hand-operated pipe docking device according to the embodiment of the present invention is described.

[0047] The hand-cranked pipe docking device of the embodiment of the present invention comprises: a connecting frame 7, a locking chain 5 and a self-locking manual winch 6. The connecting frame 7 is used to be close to the end of the first cast iron pipe 1 adjacent to the sealing. The locking chain 5 surrounds the outer circumference of the first cast iron pipe 1 and is connected to the connecting frame 7 by a hinge bolt 8, which is used to fasten the connecting frame 7 to the first cast iron pipe 1.

[0048] The self-locking manual winch 6 is arranged on the connecting frame 7 and is fixed to one end of the connecting frame 7 by bolts 10 for pulling the second cast iron pipe 3 .

[0049] An embodiment of the present invention is: after the steel plate is sheared into specified dimensions, it is bent into the cross-section shape of a channel steel, a first through hole 12 and a second through hole 14 are drilled at specified positions in the connecting plate 13, and a limiting groove 19 is milled on the bottom surface of the limiting plate 15, which constitutes a connecting frame 7, and a self-locking manual winch 6 is placed on the connecting frame 7, four bolts 10 are passed through the first through hole 12 and the through holes corresponding to the bottom surface of the self-locking manual winch 6, and the bolts 10 are tightened to fix the self-locking manual winch 6 to the connecting frame 7; hinge bolts 8 are connected at both ends of the circular chain 9, and the hinge bolts 8 are welded with screws 17 at the outer ends of the two chain links 16 at both ends of the circular chain 9, and the hinge bolt 8 at one end is inserted into the second through hole 14 at one end, and the nut 18 is threadedly connected to constitute the present invention.

[0050] The method of using the present invention is to place the connecting frame 7 and the self-locking manual winch 6 against the adjacent sealed end of the first cast iron pipe 1, that is, adjacent to the boss portion of the first cast iron pipe 1, and also insert the hinge bolt 8 at the other end of the locking chain 5 into the second through hole 14, and firmly connect them with the nut 18, so that the connecting frame 7 and the self-locking manual winch 6 are fastened to the first cast iron pipe 1, and the steel wire rope 11 on the self-locking manual winch 6 is wound around the second cast iron pipe 3 through the lock formed by the connection of the U-shaped lifting ring 4, and the handle is shaken by hand to rotate the winch to drive the steel wire rope 11 to tighten the second cast iron pipe 3, and drive the second cast iron pipe 3 to move, so that the pipe mouth is inserted into the seal of the end of the first cast iron pipe 1, thereby realizing the butt connection of the cast iron pipes.

[0051] The connecting frame 7 includes: a connecting plate 13, with four first through holes 12 arranged at the four corners of the connecting plate 13, the positions of the first through holes 12 coincide with the positions of the bottom holes of the self-locking manual winch 6, and are used to insert bolts 10 to be fixedly connected with the self-locking manual winch 6; two second through holes 14 are arranged at the two ends of the middle part thereof, which are used to pass the hinge bolts 8 and connect with the locking chain 5; a limiting plate 15, which is arranged on the bottom surface of the connecting plate 13 and is used to clamp the outer cylindrical surface of the first cast iron pipe 1. A limiting groove 19 is arranged at the outer end of the V-shaped plate. The locking chain 5 includes: a round link chain 9; a hinge bolt 8, which is arranged at the two ends of the round link chain 9 and is used to fasten the connecting frame 7 to the first cast iron pipe 1.

[0052] The hinge bolt 8 includes a chain link 16, two chain links 16 are arranged at both ends of the round link chain 9, and are used to connect the screw 17; the screw 17 is arranged at one end of the chain link, and is used to thread the nut 18. The steel wire rope 11 on the self-locking manual winch 6 is wound around the second cast iron pipe 3 through the lock formed by the connection of the U-shaped lifting ring 4, and is used to tighten the second cast iron pipe 3 and pull the second cast iron pipe 3 into the seal of the end of the first cast iron pipe 1.

[0053] The present invention is characterized in that, compared with pulling the mating cast iron pipes with a hand chain hoist, the hand-cranked pipe docking device has a small size, light weight, and is relatively easy to carry. Thus, compared with frequently moving the hand-cranked pipe docking device, the labor intensity is reduced. The hand-cranked pipe docking device of the embodiment of the present invention also improves work efficiency; during the installation of the cast iron pipe water pipeline using the hand-cranked pipe docking device, one end of the hand-cranked pipe docking device is fixedly connected to the cast iron pipe through a round chain, and the other end is connected to the cast iron pipe by a steel wire rope, and the process of tightening the loose steel wire rope is reduced by half, which correspondingly reduces the pulling time and improves work efficiency. The hand-operated pipe docking device of the embodiment of the present invention has a simple manufacturing process and a low manufacturing cost. The main structural member of the hand-operated pipe docking device is a self-locking manual winch, which is a universal lifting device with stable performance and low price. The connecting frame is formed by bending a steel plate, drilling a plurality of through holes using a drilling machine, and milling a V-shaped groove using a milling machine. During the processing and manufacturing of the present invention, relatively few machine tools are involved, and the manufacturing process is relatively simple, so that the manufacturing cost can be reduced.

[0054] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0059] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A hand-cranked pipe docking device, comprising a first cast iron pipe and a second cast iron pipe to be docked, characterized in that: include: A connecting frame, the connecting frame is used to abut against an end of the first cast iron pipe adjacent to the sealing; A locking chain, which is wrapped around the outer circumference of the first cast iron pipe and connected to the connecting frame through hinge bolts, and is used to fasten the connecting frame to the first cast iron pipe; A self-locking manual winch and a connecting component, wherein the connecting component is arranged on the second cast iron pipe, a steel wire rope is wound around the self-locking manual winch, and the steel wire rope of the self-locking manual winch is connected to the connecting component, The self-locking manual winch is arranged on the connecting frame and is fixed to one end of the connecting frame by bolts, and is used for pulling the second cast iron pipe.

2. The hand-operated pipe docking device according to claim 1, characterized in that: The connecting component includes a U-shaped ring and a connecting piece, the U-shaped ring has an opening, the connecting piece passes through both ends of the opening of the U-shaped ring to connect the U-shaped ring end to end to form a locking buckle, the steel wire rope passes between the U-shaped ring and the connecting piece, and at least part of the steel wire rope is wrapped around the second cast iron pipe and connected to the connecting piece.

3. The hand-operated pipe docking device according to claim 2, characterized in that: The connecting frame comprises: A connecting plate, wherein four first through holes are arranged at the four corners of the connecting plate, and the positions of the first through holes coincide with the positions of the foot holes of the self-locking manual winch, and are used to insert bolts to fix the self-locking manual winch; two second through holes are arranged at the two ends of the middle part thereof, and are used to pass hinge bolts to connect with the locking chain; The limiting plate is arranged on the bottom surface of the connecting plate and is used for clamping the outer circumferential surface of the first cast iron pipe.

4. The hand-operated pipe docking device according to claim 3, characterized in that: The connecting plate and the limiting plate are integrally formed.

5. The hand-operated pipe docking device according to claim 3, characterized in that: The outer end of the limiting plate is provided with a limiting groove, and the limiting groove is semicircular or V-shaped.

6. The hand-operated pipe docking device according to claim 3, characterized in that: The locking chain comprises: a round link chain; and hinge bolts, wherein the hinge bolts are arranged at both ends of the round link chain and are used to fasten the connecting frame to the first cast iron pipe.

7. The hand-operated pipe docking device according to claim 6, characterized in that: The hinge bolt comprises a chain link, wherein the two chain links are arranged at both ends of the round link chain and are used to connect the screw rod; A screw rod is arranged at one end of the chain link and is used for threaded connection with the nut.

8. The hand-operated pipe docking device according to claim 1, characterized in that: It also includes a clamping member, which is sleeved on the second cast iron pipe, and at least a part of the clamping member is connected to the steel wire rope.

9. The hand-operated pipe docking device according to claim 1, characterized in that: Also included is a friction pad, which is disposed between the connection plate and the first cast iron pipe.

10. The hand-operated pipe docking device according to claim 9, characterized in that: The friction pad may be made of any one of nitrile rubber, chloroprene rubber or fluororubber.

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