CN210608315U

CN210608315U - From holding tightly pull unwrapping wire instrument

Info

Publication number: CN210608315U
Application number: CN201921687604.2U
Authority: CN
Inventors: 吴金峰; 郭朝阳; 杨华勇; 徐相荣; 谢书鸿
Original assignee: Zhongtian Technology Marine Systems Co ltd
Current assignee: Zhongtian Technology Marine Systems Co ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-05-22
Anticipated expiration: 2029-10-10

Abstract

The utility model provides a from holding tightly and pulling unwrapping wire instrument, which comprises an outer shell, piece and adjusting device are pull in the jack-up, the equal angle of shell body periphery axial is installed three at least eccentric wheelsets, eccentric wheelset includes that two at least eccentric wheels and eccentric wheel outer peripheral face are provided with the mat surface, be provided with the trace axle on the shell body periphery axial, trace axle quantity corresponds with eccentric wheelset quantity, first inclined hole and second inclined hole have been seted up on the eccentric wheel, the eccentric wheel passes through second inclined hole swivelling joint on the shell body periphery, the eccentric wheel passes through first inclined hole swivelling joint in the trace axle, make trace axle axial displacement connect on the shell body, adjusting device makes eccentric wheelset compress tightly on the submarine cable periphery to trace axle tip department removal and counterbalance. The utility model improves the use frequency and reliability, and reduces the construction cost; the submarine cable is simple and convenient to install, the surface stress of the submarine cable is increased, and the submarine cable cannot slip; realizing the center positioning of the submarine cable; the sealing of the end of the submarine cable is protected, and the end is prevented from water entering.

Description

From holding tightly pull unwrapping wire instrument

Technical Field

The utility model relates to a cable unwrapping wire technical field, concretely relates to draw unwrapping wire instrument from holding tightly.

Background

Cable is a generic term for optical cables, electrical cables, and the like. The cable has many purposes, is mainly used for controlling installation, connecting equipment, transmitting power and other multiple functions, and is a common and indispensable object in daily life.

Submarine cables are cables wrapped with insulating materials, laid on the sea floor, and used for telecommunication transmission. With the vigorous development of the ocean industry in China, corresponding tasks need to be completed through sea cables in the fields of ocean islands, oil and gas platforms, wind power platforms, transoceanic electric energy transmission, communication and the like. In recent years, the laying strength of submarine cables is greatly improved, and the requirement of submarine cable laying is still increasing. At present, the submarine cable is laid mainly by two modes of a traction head or a traction net sleeve.

The tractor head is used only in important processes and it is a disposable product and is costly. Although the traction net cover can be repeatedly used, after construction for a plurality of times, the steel wire ropes on the traction net cover are easy to wear out, so that traction accidents are caused due to failure, and the reliability of repeated use is not high. When the traction net sleeve is constructed and installed, the central positioning is not achieved, and the local steel wire rope is damaged due to overlarge stress. When the traction net sleeve is constructed, the end head of the submarine cable needs to be ensured to have certain elasticity and has no tip, otherwise, the traction net sleeve can be directly disconnected at the end head.

Therefore, aiming at the defects of the existing traction head and the traction net sleeve, the self-holding traction paying-off tool is required to be provided, the use frequency and the reliability can be improved, and the central positioning of the cable can be realized.

Disclosure of Invention

In view of the above, the present invention provides a self-holding traction pay-off tool, which improves the frequency and reliability of use and reduces the construction cost; the submarine cable is simple and convenient to install, the stress on the surface of the submarine cable is increased, and the submarine cable cannot slip; the center positioning of the submarine cable can be realized; the sealing of the end of the submarine cable is protected, and the end is prevented from water entering.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the tool is used for clamping submarine cables and is characterized in that: the lifting traction part is installed on the end part of the outer shell body, the adjusting device can be locked to adjust and is axially connected to the end part of the outer shell body far away from the lifting traction part, at least three rows of eccentric wheel sets are axially installed on the outer periphery of the outer shell body at equal angles, each eccentric wheel set comprises at least two eccentric wheels, rough surfaces are arranged on the outer peripheral surfaces of the eccentric wheels, linkage shafts are axially arranged on the outer periphery of the outer shell body, the number of the linkage shafts corresponds to the number of the eccentric wheel sets, the end parts of the linkage shafts are close to the adjusting device, first eccentric holes and second eccentric holes are formed in the eccentric wheels, the first eccentric holes are located at the outer peripheral edges of the eccentric wheels, the second eccentric holes are located at the position where the eccentric wheels are close to the center, and the eccentric wheels are rotationally connected to the outer periphery of the outer shell, the eccentric wheel is rotatably connected in the linkage shaft through the first eccentric hole, so that the linkage shaft is axially movably connected to the outer shell, and the adjusting device is adjusted to move towards the end part of the linkage shaft and abut against the end part of the linkage shaft so that the eccentric wheel group is pressed on the periphery of the submarine cable.

Preferably, at least three rows of through groove sets corresponding to the number of the eccentric wheel sets are arranged on the outer periphery of the outer shell in an equal angle in the axial direction, each through groove set comprises at least two through grooves corresponding to the number of the eccentric wheels, and the eccentric wheels are rotatably connected to two side walls of the through grooves on the outer periphery of the outer shell through the second eccentric holes.

Preferably, the through groove is rectangular, rhombic or elliptical, a rectangular structure, a rhombic structure or an elliptical structure corresponding to the through groove is arranged in the linkage shaft, and the eccentric wheel is rotatably connected into the rectangular structure, the rhombic structure or the elliptical structure of the linkage shaft through the first eccentric hole.

Preferably, at least two pairs of connecting shaft positioning holes corresponding to the first eccentric holes are formed in two sides of the connecting shaft, and the eccentric wheel is communicated with the connecting shaft positioning holes through the first eccentric holes and is rotatably connected to the connecting shaft.

Preferably, the first eccentric hole penetrates through and is fixedly connected with a first positioning shaft, and the eccentric wheel penetrates through the first positioning shaft through the first eccentric hole and is rotatably connected in the pair of connecting shaft positioning holes.

Preferably, the outer shell is provided with a pair of outer shell positioning holes corresponding to the second eccentric holes at positions on two sides of the through groove, and the eccentric wheel is communicated with the outer shell positioning holes through the second eccentric holes and is rotatably connected to the outer shell.

Preferably, the second eccentric hole penetrates through and is fixedly connected with a second positioning shaft, and the eccentric wheel is rotatably connected in the housing positioning hole through the second positioning shaft.

Preferably, the adjusting device is a hollow cylinder, the inner wall of the adjusting device is provided with an internal thread, the outer periphery of the end part of the outer shell is provided with an external thread, and the adjusting nut is in threaded connection with the external thread on the outer shell through the internal thread.

Preferably, the hoisting traction member is a traction head or a shackle or a hook or a wire rope or a butterfly ring, and the traction head or the shackle or the hook or the wire rope or the butterfly ring is mounted on the end part of the outer shell.

Compared with the prior art, the utility model discloses following beneficial technological effect has: (1) the submarine cable is simple and convenient to mount through the design of the eccentric wheel, and the stress acting on the surface of the submarine cable sheath is correspondingly increased along with the increase of the tension in the drawing process, so that the submarine cable is prevented from slipping; (2) the arrangement of the eccentric wheel array structure and the adjusting device realizes the central positioning of the submarine cable, the submarine cable does not deviate in the traction process, and simultaneously the acting force on the surface of the submarine cable sheath can be shared and the stress is uniform, so that the service performance of the tool is improved; (3) the key parts are placed in the tool, so that the problem of abrasion in the drawing process is avoided, and the reliability of repeated use is improved; (4) through the non-fixed design, the product can be repeatedly used, and the construction cost is reduced; (5) the submarine cable end can be independently placed in the tool and is in an unstressed state, so that the submarine cable end is protected from being sealed, and the end is prevented from being watered; (6) through the non-fixed design, the product can be repeatedly used, and the construction cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an overall perspective view provided by the present invention;

fig. 2 is a schematic diagram of an outer casing provided by the present invention;

fig. 3 is a partial cross-sectional view provided by the present invention;

fig. 4 is a schematic view of an eccentric wheel provided by the present invention;

fig. 5 is a schematic view of a traction head provided by the present invention;

fig. 6 is a schematic view of the coupling shaft provided by the present invention;

fig. 7 is a schematic view of the calibration nut provided by the present invention.

Reference numerals and component parts description referred to in the drawings:

1. an outer housing; 11. a through groove; 12. a shell positioning hole; 13. an external thread; 2. a hoisting traction member; 21. a traction head; 3. an adjustment device; 31. calibrating the nut; 4. an eccentric wheel; 41. a first offset hole; 42. a second offset hole; 5. a linkage shaft; 51. a connecting shaft positioning hole; 6. a first positioning shaft; 7. and a second positioning shaft.

Detailed Description

The technical solution of the present invention will be described clearly and completely through the following detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model provides a draw unwrapping wire instrument from holding tightly, it is shown to refer to fig. 1 ~ 7, should draw unwrapping wire instrument from holding tightly and include that shell body 1, jack-up draw 2 and adjusting device 3, shell body 1 is used for holding the rotation of eccentric wheel 4 and the clamp of submarine cable tightly for the stress position of this instrument is located inside shell body 1. Wherein, the outer shell 1 is a hollow cylinder. The hoisting traction piece 2 is used for being connected with external equipment, so that the tool can be connected with the external equipment to play a role in connection. The adjusting device 3 has an adjusting function and is used for adjusting the rotating position of the eccentric wheel 4, so that the submarine cable is clamped. The hoisting traction part 2 is arranged at the end part of the outer shell 1, and can be in threaded connection with each other, so that the hoisting traction part 2 is convenient to install and detach. The adjusting device 3 can be lockably adjusted and axially connected to the end of the outer shell 1 far away from the hoisting traction part 2, and any connection mode can be adopted between the adjusting device 3 and the end of the outer shell 1, as long as the adjusting device 3 can be adjusted and locked at the other end. The hoisting traction part 2 and the adjusting device 3 are connected to the outer shell 1 in a non-fixed mode, so that the tool can be repeatedly used, and the construction cost is reduced. Preferably, both ends of the outer shell 1 are provided with external threads 13, and the hoisting traction part 2 and the adjusting device 3 are both connected to the outer shell 1 in a threaded manner.

The periphery of the outer shell 1 and the axial direction are provided with eccentric wheel sets, and the eccentric wheel sets are three rows or more. When the eccentric wheel sets are three, the eccentric wheel sets are arranged in the outer shell 1 in an angle of 120 degrees; when the eccentric wheel sets are four groups, the eccentric wheel sets are arranged in the outer shell 1 in an angle of 90 degrees; when the eccentric wheels 4 are in multiple groups, the eccentric wheel groups are distributed on the outer shell 1 in an equal angle. The eccentric wheel sets are arranged at equal angles, and are distributed in an array structure, so that the function of central positioning can be achieved; meanwhile, in the traction process, the force value is always at the center of the submarine cable, so that the stress on the outer side of the submarine cable is uniform, and the service performance of the tool is improved. The eccentric wheel group comprises two or more eccentric wheels 4, and the eccentric wheels 4 are in a circular cake shape; when a plurality of eccentric wheels 4 are arranged, the eccentric wheels 4 are axially arranged and positioned on the same straight line; wherein the distance between the eccentric wheels 4 can be arranged at equal intervals or at unequal intervals. The rough surface is arranged on the peripheral surface of the eccentric wheel 4, and can increase the static friction force between the eccentric wheel 4 and the submarine cable, so that the submarine cable is not easy to slide after being stressed. The rough surface can be a thread or a helical tooth as long as the static friction force between the eccentric wheel 4 and the clamped object can be increased. By placing the eccentric wheel 4 inside the outer shell 1, the use frequency and reliability of the tool can be greatly improved, and the construction cost is reduced.

The outer periphery of the outer shell 1 is axially provided with linkage shafts 5, the number of the linkage shafts 5 corresponds to the number of the eccentric wheel sets, and the end parts of the linkage shafts 5 are close to the adjusting device 3. And each eccentric wheel set is connected with a linkage shaft 5, wherein the linkage shaft 5 is connected to the periphery of the outer shell 1 through each eccentric wheel 4 in the eccentric wheel set. Two sides of the peripheral edge of the eccentric wheel 4 are positioned in the interlocking shaft 5, and two sides of the eccentric wheel 4 are arranged in two sides of the interlocking shaft 5 and can rotate in the interlocking shaft 5. Wherein, the outer peripheral edge of eccentric wheel 4 is seted up first eccentric orfice 41, and eccentric wheel 4 passes through first eccentric orfice 41 swivelling joint in interlock axle 5, and first eccentric orfice 41 plays the connection effect promptly. The eccentric wheel 4 is provided with a second eccentric hole 42 near the center, and the eccentric wheel 4 is rotatably connected to the outer shell 1 through the second eccentric hole 42, so that the installation of the eccentric wheel 4 is completed, i.e. the second eccentric hole 42 plays a role in connection. The first and second

eccentric holes

41 and 42 cannot be located at the center of the eccentric 4 and on the same diameter therebetween. The adjusting device 3 can be installed and disassembled, when the adjusting device 3 is screwed down, the plane of the adjusting device 3 moves towards the end part of the linkage shaft 5 until the adjusting device 3 is in close contact with the end part of the linkage shaft 5, so that the linkage shaft 5 is arranged orderly, the positions of all eccentric wheels 4 are kept consistent, and the stress on the periphery of the submarine cable is consistent; simultaneously, interlock axle 5 moves to being close to jack-up pulling member 2 direction on outer casing 1, and then drives eccentric wheel 4 and rotate, and the length of eccentric wheel 4 surface apart from the axle is different, and eccentric wheel 4 rotates the main trend in this instrument and is the length of keeping apart from the axle lengthens to the contact stress between eccentric wheel 4 and submarine cable has further been increased, thereby impels the increase of static friction, makes the instrument fixed with the submarine cable tighter.

Through the design of eccentric wheel 4 and interlock axle 5, can realize that the submarine cable is simple and convenient to install, along with tensile increase, the tractive in-process simultaneously also can corresponding increase at the surperficial stress of submarine cable sheath to guarantee can not the slippage.

Specifically, the outer shell 1 is provided with a through groove group in the axial direction, the distribution form of the through groove group is the same as that of the eccentric wheel group, and the installation positions and the number of the through groove group correspond to each other. The through groove group comprises two or more through grooves 11, and the through grooves 11 provide places for the installation of the eccentric wheel 4. The through grooves 11 are axially arranged on the outer shell 1 and are positioned on the same straight line, and the through grooves 11 are arranged at equal intervals or at unequal intervals. The number of the through grooves 11 can be calculated according to the size and the assembly of the eccentric wheel 4, and the number of the specific through grooves 11 can be set according to the actual situation. The through groove 11 can be in any shape, and the eccentric wheel 4 can be placed in the through groove while the eccentric wheel 4 is convenient to mount.

Specifically, the through groove 11 is rectangular, rhombic or elliptical, and the rectangular, rhombic or elliptical shape is easy to process and handle. The linkage shaft 5 is internally provided with rectangular structures, rhombic structures or elliptical structures which are arranged in an array mode, wherein the rectangular structures correspond to the rectangular through grooves 11, or the rhombic structures correspond to the rhombic through grooves 11, or the elliptical structures correspond to the elliptical through grooves 11. During the installation process of the eccentric wheel 4, the eccentric wheel is connected in the rectangular structure, the rhombic structure or the elliptical structure of the linkage shaft 5 through the first eccentric hole 41. Preferably, the linkage shaft 5 can be a cuboid, so that the processing is simple and the production cost is low; or the through slots 11 may be rectangular in shape. When the linkage shaft 5 can be a cuboid as a whole, the middle part of the linkage shaft penetrates through the cuboid, and linkage shaft positioning holes 51 are uniformly distributed along the longitudinal direction.

At least two pairs of connecting shaft positioning holes 51 are formed in two sides of the connecting shaft 5, one pair of connecting shaft positioning holes 51 is connected with one eccentric wheel 4, and the connecting shaft positioning holes 51 provide rotating points for the rotation of the eccentric wheel 4. The number of pairs of the connecting shaft positioning holes 51 corresponds to the number of the eccentric wheels 4. Wherein, the coupling shaft is provided with a rectangular structure, a diamond structure or an oval structure, and the rectangular structure, the diamond structure or the oval structure is distributed with coupling shaft positioning holes 51.

Specifically, the first eccentric hole 41 is located at the position of the outer peripheral edge of the eccentric wheel 4. The first positioning shaft 6 passes through the first offset hole 41 and is fixedly connected to the eccentric wheel 4, wherein the first positioning shaft 6 is cylindrical. The eccentric 4 is mounted in a pair of coupling positioning holes 51 through the first positioning shaft 6 so that the eccentric is rotatably coupled in the coupling positioning holes 51.

The shell body 1 is provided with a shell positioning hole 12, and the shell positioning hole 12 provides a mounting point for mounting the eccentric wheel 4. The shell positioning holes 12 are arranged in pairs and located at two sides of the through groove 11, and the shell positioning holes 12 are transversely formed. The number of pairs of positioning holes 12 of the housing corresponds to the number of the eccentric wheels 4.

Specifically, the second offset hole 42 is located near the center. The second positioning shaft 7 passes through the second eccentric hole 42 and is fixedly connected to the eccentric wheel 4, wherein the second positioning shaft 7 is in a cylindrical structure. The eccentric 4 is mounted in a pair of housing positioning holes 12 by a second positioning shaft 7, which is rotatably coupled in the housing positioning holes 12.

The adjusting device 3 is a calibration nut 31, and the calibration nut 31 is a hollow cylinder, and an internal thread is arranged inside the hollow cylinder. Outer casing 1 is provided with external screw thread 13 on being close to adjusting device 3's the tip periphery, and calibration nut 31 is through internal thread and the external screw thread 13 threaded connection on the outer casing 1, makes things convenient for the tightening and the unscrewing of calibration nut 31.

The hoisting traction piece 2 is a traction head 21 or a shackle or a hook or a steel wire rope or a butterfly ring, so that the tool has strong compatibility and can meet the requirements of different scenes. When the traction head 21 or the shackle or the hook or the steel wire rope or the butterfly-shaped ring is connected with the outer shell 1, the specific connection mode is not limited as long as the traction head 21 or the shackle or the hook or the steel wire rope or the butterfly-shaped ring can be connected and matched with the end of the outer shell 1. Preferably, the pulling head 21 is a cylinder with a smooth surface at one end, and is hollow, and the other end is configured to be connected with a lifting part such as a shackle.

The working principle is as follows: the eccentric wheel 4 is contacted with the submarine cable by screwing the calibration nut 31, and certain pretightening force exists; when the traction is started by external arrangement, the tension of the submarine cable drives the eccentric wheel 4 to rotate along with the increase of the tension, and the eccentric wheel 4 is characterized in that the shaft is not in the center of a circle, so that the distance between the surface of the eccentric wheel 4 and the shaft is different during the rotation. The main trend of the rotation of the eccentric wheel 4 in the tool is that the length from the shaft is longer, so that the contact stress between the eccentric wheel 4 and a submarine cable is further increased, the static friction force is increased, and the larger the traction tension is, the tighter the tool is fixed with the submarine cable; meanwhile, the eccentric wheel 4 rotates and simultaneously drives the linkage shaft 5 to axially move on the outer shell 1, and then the calibration nut 31 is screwed again, so that the tool is prevented from loosening in the construction process. The assembling process comprises the following steps: the installation of the structure is finished by installing the eccentric wheel 4 on the outer shell 1 by using the second positioning shaft 7, assembling the interlocking shaft 5 with the eccentric wheel 4 by using the first positioning shaft 6, paying attention to the direction consistency, then installing the hoisting traction piece 2 at the end part of the outer shell 1, and installing the calibration nut 31 at the other end part of the outer shell 1.

The using method of the self-holding traction pay-off tool comprises the following steps that a) the adjusting device 3 is firstly loosened, so that the linkage shaft 5 can freely move; b) installing a submarine cable: processing the end of the submarine cable according to the construction requirements of a specific site, firstly taking down the hoisting traction piece 2, penetrating the submarine cable from the end part of the outer shell 1 close to the installation position of the adjusting device 3, processing the end part of the outer shell 1 close to the installation position of the hoisting traction piece 2, and then installing the hoisting traction piece 2; if the submarine cable does not need to be processed, the submarine cable is directly threaded from the end part of the outer shell 1 close to the installation position of the adjusting device 3 to the other end part of the outer shell 1; c) the eccentric wheel 4 is contacted with the submarine cable through the adjusting device 3, and certain pretightening force exists; d) the adjusting device 3 is screwed down, so that the eccentric wheel 4 is contacted with the submarine cable, the center positioning of the submarine cable is realized, and the pre-holding force is provided on the submarine cable jacket; e) using external equipment to provide initial tension, screwing the adjusting device 3 again after the eccentric wheel 4 is further tightly held, and ensuring that tools cannot be loosened in the construction process; e) and after the installation is finished, the traction and paying-off construction can be carried out.

Meanwhile, in the installation process of the submarine cable, the end of the submarine cable can be independently placed in the end part of the outer shell 1 close to the hoisting traction device 2 and is in an unstressed state, so that the end of the submarine cable is protected from being sealed, and the end is prevented from being watered.

When the tool is used, the tool is suitable for laying different cables.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-holding traction pay-off tool, the tool being used for clamping a submarine cable, characterized in that: the lifting traction device comprises an outer shell (1), a lifting traction part (2) and an adjusting device (3), wherein the lifting traction part (2) is installed on the end part of the outer shell (1), the adjusting device (3) can be locked to adjust and is axially connected to the end part of the outer shell (1) far away from the lifting traction part (2), at least three rows of eccentric wheel sets are axially installed at equal angles on the outer periphery of the outer shell (1), each eccentric wheel set comprises at least two eccentric wheels (4), rough surfaces are arranged on the outer peripheral surfaces of the eccentric wheels (4), a linkage shaft (5) is axially arranged on the outer periphery of the outer shell (1), the number of the linkage shafts (5) corresponds to the number of the eccentric wheel sets, the end parts of the linkage shafts are close to the adjusting device (3), a first eccentric hole (41) and a second eccentric hole (42) are formed in the eccentric wheels (4), and the first eccentric hole (41) is located at the outer peripheral edge of, the second eccentric hole (42) is located eccentric wheel (4) is close to central point and puts the department, eccentric wheel (4) pass through second eccentric hole (42) swivelling joint in shell body (1) periphery, eccentric wheel (4) pass through first eccentric hole (41) swivelling joint in interlock axle (5) make interlock axle (5) axial displacement connect in on shell body (1), adjust adjusting device (3) to interlock axle (5) tip department removes and offsets in interlock axle (5) tip makes eccentric wheelset compress tightly in the submarine cable periphery is last.

2. The self-gripping traction pay-off tool of claim 1, wherein: the outer shell (1) periphery is axially provided with at least three rows of through groove sets corresponding to the number of the eccentric wheel sets at equal angles, each through groove set comprises at least two through grooves (11) corresponding to the number of the eccentric wheels (4), and the eccentric wheels (4) are rotatably connected to the two side walls of the through grooves (11) in the outer shell (1) periphery through second eccentric holes (42).

3. A self-gripping traction payout tool as defined in claim 2, wherein: the shape of the through groove (11) is rectangular, rhombic or elliptical, a rectangular structure, a rhombic structure or an elliptical structure corresponding to the shape of the through groove (11) is arranged in the linkage shaft (5), and the eccentric wheel (4) is rotatably connected in the rectangular structure, the rhombic structure or the elliptical structure of the linkage shaft (5) through the first eccentric hole (41).

4. A self-gripping pulling and pay-off tool according to any one of claims 1 to 3, wherein: at least two pairs of connecting shaft positioning holes (51) corresponding to the first eccentric holes are formed in the two sides of the connecting shaft (5), and the eccentric wheel (4) is communicated with the connecting shaft positioning holes (51) through the first eccentric holes (41) and is rotatably connected to the connecting shaft (5).

5. The self-gripping traction pay-off tool of claim 4, wherein: the first eccentric hole (41) penetrates through and is fixedly connected with a first positioning shaft (6), and the eccentric wheel (4) is rotatably connected into the pair of connecting shaft positioning holes (51) through the first positioning shaft (6).

6. A self-gripping pulling and pay-off tool according to claim 2 or 3, wherein: the shell body (1) is positioned at the positions of two sides of the through groove (11) and is provided with a pair of shell positioning holes (12) corresponding to the second eccentric holes (42), and the eccentric wheel (4) is communicated with the shell positioning holes (12) through the second eccentric holes (42) and is rotatably connected to the shell body (1).

7. The self-gripping traction pay-off tool of claim 6, wherein: the second eccentric hole (42) penetrates through and is fixedly connected with a second positioning shaft (7), and the eccentric wheel (4) is rotatably connected into the shell positioning hole (12) through the second positioning shaft (7).

8. A self-gripping pulling and pay-off tool according to any one of claims 1 to 3, wherein: adjusting device (3) are hollow cylinder and inner wall have internal screw thread calibration nut (31), be provided with external screw thread (13) on shell body (1) tip periphery, calibration nut (31) pass through the internal thread with on shell body (1) external screw thread (13) threaded connection.

9. A self-gripping pulling and pay-off tool according to any one of claims 1 to 3, wherein: the hoisting traction piece (2) is a traction head (21), an shackle, a hook, a steel wire rope or a butterfly ring, and the traction head (21), the shackle, the hook, the steel wire rope or the butterfly ring is arranged on the end part of the outer shell (1).