CN117449777A - Quick counter-pulling device for cable under pressure operation - Google Patents

Abstract

The invention provides a quick counter pulling device for a cable under pressure, which comprises a hydraulic cylinder, wherein an upper connecting piece is connected to a cylinder body of the hydraulic cylinder and is used for fixedly connecting the hydraulic cylinder to a lubricator; the piston rod of pneumatic cylinder is through lower connecting piece fixedly connected with cable checkpost, and cable checkpost is used for fixed blowout preventer intraductal cable that stretches out. When the piston rod of the hydraulic cylinder stretches, the cable is pulled to move in a direction away from the lubricator, so that the purpose of reversely pulling the cable is achieved. Compared with the prior art, the quick counter pulling device for the cable under pressure has the advantages that the counter pulling force is controlled by accurately controlling the pressure of the hydraulic cylinder, and the pulling force can be accurately calculated, so that whether the tensile force of the cable exceeds the safe pulling force of the cable during unlocking can be determined, and if the tensile force of the cable does not exceed the safe pulling force of the cable, the cable can be continuously used, and therefore the use cost of the cable is low. In field construction, a hydraulic control system of a grease injection control console can be adopted to provide hydraulic power, control and calculate the magnitude of the counter-tension.

Description

Quick counter-pulling device for cable under pressure operation

Technical Field

The invention relates to the technical field of oil and gas exploration equipment, in particular to a quick counter-pulling device for a cable under pressure.

Background

The cable is easy to be blocked in the control head in the operation process under pressure, and the main cause is that the viscera of the well enter the choke tube, so that the cable is lifted up to be blocked and is lowered to be blocked. When the situation is generally met, the cable blowout preventer is closed on site to release the pressure in the lubricator, the blowout preventer is detached from the joint of the lubricator and the blowout preventer, after a cable clamp is lifted up to a wellhead of 1 meter, the cable clamp is fixed to the wellhead blowout preventer, and the cable is reversely pulled by the crane to try to unclamp. Because the crane suspended weight error is large, the reverse pull tonnage cannot be accurately controlled. Meanwhile, the crane is far away from the wellhead blowout prevention equipment, the blowout prevention equipment is heavier, and when the crane reversely pulls the cable to release the card, firstly, the crane has insufficient upward pulling force (the maximum allowable upward lifting weight of the crane is reached), and the purpose of releasing the card cannot be achieved; secondly, the suspended weight of the crane is inaccurate, and the lifting tension possibly exceeds the cable safety tension, so that the cable is not dared to be reused; thirdly, if the lifting force on the crane is too large, the blowout prevention pipe can shake violently in the moment of cable breaking, and safety risks exist. If the cable clip is not firmly fixed and the operation is improper, the cable is pulled back by the crane, and the risk of hurting people exists.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a quick counter pulling device for a cable special for operation under pressure, which can effectively control the counter pulling force and accurately calculate the pulling force.

The invention provides a quick counter pulling device for a cable under pressure, which comprises a hydraulic cylinder, wherein an upper connecting piece is connected to a cylinder body of the hydraulic cylinder and is used for fixedly connecting the hydraulic cylinder to a lubricator; the hydraulic cylinder is characterized in that a lower connecting piece is connected to a piston rod of the hydraulic cylinder, a cable clip is fixedly connected to the lower connecting piece, and the cable clip is used for fixing a cable extending out of the lubricator.

The magnitude of the reverse tension is controlled by precisely controlling the magnitude of the pressure of the hydraulic cylinder, and the magnitude of the tension can be precisely calculated, so that whether the tension of the cable exceeds the cable safety tension during unlocking can be determined, if the tension of the cable does not exceed the cable safety tension, the cable can be continuously used, and the use cost of the cable is reduced.

Preferably, the upper connecting piece comprises a tubular joint, the outer wall of the tubular joint is provided with external threads or the inner wall of the tubular joint is provided with internal threads, and the tubular joint is in threaded connection with the lubricator through the external threads or the internal threads; the side wall of the tubular joint is provided with a groove penetrating through two ends of the tubular joint, and the groove is communicated with the space inside the tubular joint and can be used for a cable to pass through; the hydraulic cylinders are provided with two, the cylinder bodies of the two hydraulic cylinders are respectively fixedly connected to the tubular connector and located on two sides of the axis of the tubular connector, the two hydraulic cylinders are parallel to the axis direction of the tubular connector, and the piston rods of the two hydraulic cylinders are respectively fixedly connected to the cable clamps and located on two opposite sides of the cable clamps.

Preferably, the upper connecting piece further comprises a supporting plate, the supporting plate is fixedly arranged at the bottom of the tubular joint, a notch through which a cable can pass is formed in one side of the supporting plate, and the notch is communicated with the groove and extends to the axis direction of the joint; the two hydraulic cylinders are fixedly arranged at the bottom of the supporting plate and are positioned at two sides of the notch.

Preferably, the upper connecting piece is connected with the hydraulic cylinder through a quick-mounting joint.

Preferably, the quick-install coupling comprises a female coupling, a male coupling, a ball, and a first sleeve;

the female connector is provided with an annular groove;

the male connector is provided with a cavity for inserting the female connector, the male connector is provided with a plurality of mounting holes, the mounting holes penetrate through the outer surface of the male connector and the inner wall of the cavity, and an outer hole and an inner hole are respectively formed on the outer surface of the male connector and the inner wall of the cavity; the outer surface of the male connector is also provided with external threads;

the sphere is arranged in the mounting hole, and the diameter of the sphere is smaller than the aperture of the outer hole and larger than the depth of the mounting hole and the aperture of the inner hole;

a stepped hole is formed in the first sleeve, the stepped hole comprises a large hole section with a larger diameter and a small hole section with a smaller diameter, an internal thread matched with the external thread is formed in the small hole section, and the first sleeve is sleeved on the male connector and is in threaded connection with the male connector;

when the small Kong Duanwei of the first sleeve is at the outer aperture, the first sleeve presses the ball into the annular groove of the female connector; when the large hole section of the first sleeve is positioned at the outer hole, the ball body can be completely separated from the annular groove of the female connector by pulling the female connector.

The quick mounting connector is firm and reliable in connection, the locking and unlocking can be realized by only screwing the first sleeve, other auxiliary tools are not needed, and the operation is convenient; and the device has no scattered parts, can effectively avoid the problem of part loss, and is particularly suitable for operation and use in construction sites.

Preferably, the lower connector comprises a connector link and a second sleeve; the connecting buckle comprises an arc-shaped body, the arc-shaped body is clamped on the cable clamp, the arc-shaped body comprises a first end and a second end, the first end is provided with a mounting column, and the mounting column is provided with external threads and screw holes;

the inner cavity of the second sleeve comprises a cylindrical cavity and a horn-shaped cavity which are communicated, an inner thread matched with the outer thread of the mounting column is arranged in the cylindrical cavity, and the horn-shaped cavity is gradually enlarged from inside to outside; the second sleeve is sleeved on the mounting column and is in threaded connection with the mounting column, and the second end of the arc-shaped body can extend into the horn-shaped cavity of the second sleeve and is abutted against the inner wall of the horn-shaped cavity;

the piston rod is provided with external threads, and the piston is screwed into the screw hole to be in threaded connection with the first end.

When the lower connecting piece is connected with the piston rod and the cable clamp, the lower connecting piece can be connected and fixed by hand without assistance of auxiliary tools such as a spanner and the like; and no scattered parts exist, so that the parts are not easy to lose.

Preferably, the arc body comprises a first clamping block and a second clamping block which are hinged into a whole, wherein one end of the first clamping block, which is far away from the hinged position, is a first end of the arc body, and one end of the second clamping block, which is far away from the hinged position, is a second end of the arc body.

Preferably, the cable clip comprises a ferrule and a clip; the clamping sleeve is of a columnar structure, a conical through hole extending along the axial direction of the clamping sleeve is formed in the clamping sleeve, a first opening penetrating through two ends of the clamping sleeve is formed in the outer wall of the clamping sleeve, and the first opening is communicated with the conical through hole and can be used for the cable to pass through; the clip comprises two symmetrical clamping plates, and the two clamping plates are buckled to form a conical structure; the clamp is inserted in the conical through hole, and the taper of the clamp is equal to that of the conical through hole.

Through the conical through hole of cutting ferrule and the conical structural design of checkpost, when the cable receives the back pulling force, the pulling force is great more, and the cable checkpost is tighter with the card between the cable, has effectively avoided the cable atress to break away from the condition emergence of cable checkpost.

Preferably, the cable clip further comprises a third sleeve, an inner thread is arranged on the inner wall of the third sleeve, a second opening penetrating through two ends of the third sleeve is formed in the outer wall of the third sleeve, and the second opening is communicated with a cavity in the third sleeve and can be used for the cable to pass through; the cutting sleeve is provided with external threads matched with the internal threads of the third sleeve, the third sleeve is sleeved on the outer wall of the cutting sleeve and is in threaded connection with the cutting sleeve, and the second opening is staggered with the first opening.

Preferably, the hydraulic system is further connected with the hydraulic cylinder, and the hydraulic system is used for controlling and calculating the pressure of the hydraulic cylinder.

Compared with the prior art, the quick counter pulling device for the cable under pressure has the advantages that the counter pulling force is controlled by accurately controlling the pressure of the hydraulic cylinder, and the pulling force can be accurately calculated, so that whether the tensile force of the cable exceeds the safe pulling force of the cable during unlocking can be determined, and if the tensile force of the cable does not exceed the safe pulling force of the cable, the cable can be continuously used, and therefore the use cost of the cable is low. In field construction, a hydraulic control system of a grease injection control console can be adopted to provide hydraulic power, control and calculate the magnitude of the counter-tension. The problem that the existing crane pull-up force is insufficient when a cable is handled in the grease injection blowout prevention box and is blocked by the reverse cable pulling of the crane, and the blocking releasing purpose cannot be achieved is solved; the problems that the suspended weight of a crane is inaccurate, the lifting tension possibly exceeds the safety tension of the cable, and the cable is not dared to be reused are solved; the problems that if the lifting force on the crane is too large, the blowout prevention pipe can shake violently in the moment of cable breaking, safety risks exist, if the cable clamp is not firmly fixed, the operation is improper and the like when the cable is reversely pulled by the crane are avoided.

The above-described features may be combined in various suitable ways or replaced by equivalent features as long as the object of the present invention can be achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of an embodiment which is only non-limiting and with reference to the accompanying drawings. Wherein:

fig. 1 is a front view of a quick reverse pulling device for a cable under pressure according to an embodiment of the present invention;

FIG. 2 is a side view of a quick reverse pulling device for a cable under pressure according to an embodiment of the present invention;

FIG. 3 is a perspective view of a quick reverse pulling device for a cable with pressure according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a quick reverse pulling device for a cable under pressure according to an embodiment of the present invention;

FIG. 5 is an enlarged view of FIG. 4 at A;

FIG. 6 is an enlarged view at B in FIG. 4;

fig. 7 is a front view of a quick reverse pulling device for a cable under pressure according to another embodiment of the present invention.

Reference numerals illustrate:

1. an upper connecting piece;

11. a tubular joint; 12. a groove; 13. a support plate; 14. a notch;

2. a hydraulic cylinder; 21. a cylinder; 22. a piston; 23. a piston rod;

3. a lower connecting piece; 31. a connecting buckle; 311. a first clamping block; 312. a second clamping block; 313. a mounting column; 314. a screw hole; 32. a second sleeve; 321. a horn-shaped cavity;

4. a cable clip; 41. a cutting sleeve; 411. a first opening; 42. a clip; 43. a third sleeve; 431. a second opening; 44. a columnar rod;

5. rapidly installing a joint; 51. a female joint; 511. an annular groove; 52. a male connector; 521. a mounting hole; 53. a sphere; 54. a first sleeve;

6. and (3) a cable.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the specific embodiments of the present invention are within the scope of the present invention.

The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

In this disclosure, when a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device. When it is described that a particular device is connected to other devices, the particular device may be directly connected to the other devices without intervening devices, or may be directly connected to the other devices without intervening devices.

All terms (including technical or scientific terms) used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Example 1

As shown in fig. 1 to 6, the quick reverse device for a cable for a pressurized operation (hereinafter referred to as reverse device) includes a hydraulic cylinder 2, an upper connector 1, a lower connector 3, and a cable clip 4. The hydraulic cylinder 2 comprises a cylinder body 21, a piston 22 and a piston rod 23, wherein one end, far away from the piston rod 23, of the cylinder body 21 is connected with an upper connecting piece 1, and the upper connecting piece 1 is used for fixedly connecting the hydraulic cylinder 2 to the lubricator; the piston rod 23 of pneumatic cylinder 2 keeps away from cylinder body 21 one end and is connected with down connecting piece 3, and lower connecting piece 3 fixedly connected with cable clamp 4, cable clamp 4 are used for fixed blowout preventer cable 6 that stretches out in the pipe.

The hydraulic cylinder 2 is started to enable the piston rod 23 to extend, and the cable 6 is pulled to move away from the lubricator, so that the purpose of reversely pulling the cable 6 is achieved. The pressure of the hydraulic cylinder 2 is convenient to accurately control and calculate, and the magnitude of the counter-tension force is controlled by accurately controlling the pressure of the hydraulic cylinder 2, so that the cable 6 can be effectively prevented from being broken due to overlarge tension force; and the tension can be accurately calculated, so that whether the tension of the cable 6 exceeds the safety tension of the cable 6 during unlocking can be determined, and if the tension does not exceed the safety tension, the cable 6 can be continuously used, and the use cost of the cable 6 is reduced.

The magnitude of the pressure of the hydraulic cylinder 2 of the counter-pulling device can be controlled and calculated by means of the hydraulic system after connecting the hydraulic cylinder 2 to the hydraulic system. In site construction, a hydraulic system of the grease injection control console can be connected with the hydraulic cylinder 2, a hydraulic control system of the site grease injection control console is adopted to provide hydraulic power, control the magnitude of the counter tension, and the magnitude of the tension can be accurately calculated.

The upper connector 1 comprises a tubular joint 11 and a support plate 13.

The outer wall of the tubular joint 11 is provided with external threads or the inner wall of the tubular joint 11 is provided with internal threads, correspondingly, the inner wall of the lubricator is provided with internal threads or the outer wall of the lubricator is provided with external threads, so that the tubular joint 11 and the lubricator form threaded connection, and the connected tubular joint 11 is coaxial with the lubricator. In this embodiment, external threads are provided on the outer wall of the tubular joint 11, and correspondingly, internal threads may be provided on the inner wall of the lubricator. Compared with the mode of bolt connection, scattered parts are not required to be carried during threaded connection, and the parts are not easy to lose; and no additional tool is needed during installation, and the operation is simple. The side wall of the tubular joint 11 is provided with a groove 12 penetrating through the upper end and the lower end of the tubular joint 11, the groove 12 is communicated with the space inside the tubular joint 11, and the groove 12 can be used for allowing the cable 6 to pass through, so that the cable 6 can enter the space inside the tubular joint 11 from the side surface of the tubular joint 11. The support plate 13 is fixedly arranged at the bottom of the tubular joint 11, one side of the support plate 13 is provided with a notch 14 for the cable 6 to pass through, the notch 14 is communicated with the groove 12, and the notch also extends to the axial direction of the joint, so that the cable 6 is ensured to be positioned in the axial direction of the tubular joint 11. The hydraulic cylinder 2 can be easily fixed with the upper connecting member 1 by providing the support plate 13. By providing the groove 12 in the tubular joint 11 and the notch 14 in the support plate 13, the cable 6 can be snapped into the upper connector 1 from the side of the upper connector 1 through the groove 12 and the notch 14 without cutting the cable 6 and without extending into and out of one end of the upper connector 1 and the other end after cutting the cable 6.

The hydraulic cylinders 2 are preferably arranged in two, the cylinder bodies 21 of the two hydraulic cylinders 2 are respectively fixedly connected to two sides of the bottom of the tubular joint 11, the cylinder bodies 21 of the two hydraulic cylinders 2 are respectively positioned on two sides of the axial direction of the tubular joint 11, and the two hydraulic cylinders 2 are parallel to the axial direction of the tubular joint 11. The piston rods 23 of the two hydraulic cylinders 2 are fixedly connected to the cable clamp 4 and located on opposite sides of the cable clamp 4. The cable 6 is pulled by two hydraulic cylinders 2 positioned on two opposite sides of the cable clamp 4 at the same time, so that the stress of the cable 6 is uniform, and the operation stability of the whole counter pulling device in the process of counter pulling the cable 6 is improved.

The hydraulic cylinder 2 may be non-detachably connected to the upper connecting member 1 by welding, or detachably connected by bolts and nuts or the like. In order to facilitate the mounting and dismounting of the hydraulic cylinder 2, the upper connection piece 1 is preferably connected to the hydraulic cylinder 2 by means of a quick-mounting joint 5.

As shown in fig. 5, the quick-install coupling 5 includes a female coupling 51, a male coupling 52, a ball 53, and a first sleeve 54.

The female connector 51 includes a first mounting plate, preferably a flange, and a cylindrical mounting head protruding from the center of the mounting plate, and provided with an annular groove 511.

The male connector 52 comprises a second mounting plate and a mounting cylinder convexly arranged at the center of the second mounting plate, and the second mounting plate is preferably a flange plate; the cavity of the mounting cylinder can be used for inserting the mounting head and the annular groove 511 on the mounting head, a plurality of mounting holes 521 are formed in the side wall of the mounting cylinder, the mounting holes 521 penetrate through the outer surface of the mounting cylinder and the inner wall of the cavity of the mounting cylinder, and an outer hole and an inner hole are formed on the outer surface of the mounting cylinder and the inner wall of the cavity respectively. When the mounting head is fully inserted into the mounting cylinder, the annular recess 511 and the inner bore of the mounting bore 521 align and communicate with the mounting bore 521. External threads are also provided on the outer surface of the mounting barrel of the male connector 52.

The first sleeve 54 is internally provided with a stepped hole, the stepped hole comprises a large hole section with a larger diameter and a small hole section with a smaller diameter which are communicated, an internal thread matched with the external thread on the outer surface of the installation cylinder of the male connector 52 is formed in the small hole section, and the first sleeve 54 is sleeved on the male connector 52 and is in threaded connection with the male connector 52.

The sphere 53 is disposed within the mounting hole 521, the diameter of the sphere 53 being smaller than the diameter of the outer hole and larger than the depth of the mounting hole 521 and the diameter of the inner hole. The diameter of the sphere 53 is smaller than the diameter of the outer hole, so that the sphere 53 can pass through the outer hole to enter and exit the mounting hole 521; the diameter of the sphere 53 is smaller than the diameter of the inner hole, so that the sphere 53 cannot pass into and out of the mounting hole 521 through the inner hole; the larger diameter of the ball 53 than the depth of the mounting hole 521 ensures that when the ball 53 is pushed by the first sleeve 54 from the outer hole side, a portion of the ball 53 may protrude partially from the inner hole into the annular recess 511.

When the large bore section of the first sleeve 54 is located at the outer bore, the sum of the spacing of the inner wall of the large bore section and the outer wall of the mounting barrel plus the depth of the mounting bore 521 is greater than the diameter of the ball 53. The ball 53 may be retracted from the inner bore of the mounting bore 521 and extended from the outer bore into the large bore section under compression of the mounting head of the female connector 51, i.e., the mounting head of the female connector 51 may be inserted into or withdrawn from the mounting barrel. When the mounting head of the female connector 51 is fully inserted into the mounting barrel, the first sleeve 54 is screwed to gradually move the small hole section of the first sleeve 54 to the outer hole, and the first sleeve 54 presses the ball 53 into the annular groove 511 of the female connector 51 to lock the female connector 51 with the male connector 52. When the male connector 52 and the female connector 51 need to be disassembled, the first sleeve 54 is screwed to enable the large hole section to move to the outer hole, and at the moment, the female connector 51 is pulled outwards to squeeze the ball 53 to completely separate from the annular groove 511 of the female connector 51, so that the male connector 52 and the female connector 51 are unlocked and separated.

The quick mounting joint 5 designed by the application is firm and reliable in connection, only the first sleeve 54 is required to be screwed for locking and unlocking, other auxiliary tools are not required, and the operation is convenient; and the device has no scattered parts, can effectively avoid the problem of part loss, and is particularly suitable for operation and use in construction sites.

The female joint 51 is fixedly arranged on the supporting plate 13 of the upper connecting piece 1 through a first mounting disc, and the male joint 52 is fixedly arranged on the cylinder body 21 of the hydraulic cylinder 2 through a second mounting disc; or the female joint 51 is fixedly mounted on the body 21 of the hydraulic cylinder 2 by a first mounting plate, and the male joint 52 is fixedly mounted on the support plate 13 of the upper link 1 by a second mounting plate.

The hydraulic cylinder 2 can be detachably connected with the cable clamp 4 by bolts and nuts, etc., but the bolts and nuts are connected by auxiliary tools such as a spanner, and the bolts and nuts are easy to lose. In order to facilitate the installation and the disassembly of the hydraulic cylinder 2, the invention designs a novel lower connecting piece 3 for connecting the hydraulic cylinder 2 and a cable clip 4.

Referring to fig. 6, the lower connector 3 includes a connector link 31 and a second sleeve 32; the connecting buckle 31 comprises an arc-shaped body which is detachably clamped on the cable clip 4. The arc body can be of an integrally formed structure, and can be formed by hinging a first clamping block 311 and a second clamping block 312 as shown in fig. 1-6, wherein one end of the first clamping block 311 away from the hinging position is a first end of the arc body, the first end is provided with a mounting column 313, and the mounting column 313 is provided with external threads and a screw hole 314; the end of the second clamping block 312 away from the hinge is the second end of the arc-shaped body, and the first end and the second end can be close to or far away from each other by rotating the second clamping block 312.

The inner cavity of the second sleeve 32 comprises a cylindrical cavity and a horn-shaped cavity 321 which are communicated, wherein an internal thread matched with the external thread of the mounting column 313 is arranged in the cylindrical cavity, and the horn-shaped cavity 321 is gradually enlarged from inside to outside; the second sleeve 32 is sleeved on the mounting post 313 and is in threaded connection with the mounting post 313, and the second end of the arc-shaped body can extend into the horn-shaped cavity 321 of the second sleeve 32 and is abutted with the inner wall of the horn-shaped cavity 321. The second end can be adjusted to extend into the flared cavity 321 by twisting the second sleeve 32, thereby adjusting the spacing between the first and second ends to allow the connector 31 to be tightened or loosened.

The piston rod 23 is provided with external threads to screw the piston 22 into the threaded bore 314 to form a threaded connection with the first end.

When the lower connecting piece 3 is connected with the piston rod 23 and the cable clamp 4, the lower connecting piece can be connected and fixed by hand without assistance of auxiliary tools such as a spanner and the like; and no scattered parts exist, so that the parts are not easy to lose.

When the counter pulling device is assembled, the piston rod 23 is screwed into the screw hole 314 of the mounting post 313 to connect the piston rod 23 with the lower connecting piece 3; the second sleeve 32 is screwed to enable the second end to be separated from the second sleeve 32, the second clamping block 312 is rotated to enable the second end to be far away from the first end so that the arc-shaped body is opened, the opened arc-shaped body clamp moves to the cable clamp 4, the second end of the second clamping block 312 is rotated to be close to the first end so as to clamp the cable clamp 4, and then the second sleeve 32 is screwed to enable the second end to gradually extend into the second sleeve 32, so that the connecting buckle 31 is screwed, and the connecting buckle is firmly buckled on the cable clamp 4.

The cable clip 4 comprises a ferrule 41, a clip 42 and a third sleeve 43.

The cutting ferrule 41 is columnar structure, is provided with the external screw thread on the cutting ferrule 41, and its inside toper through-hole that extends along its axial is offered on the outer wall of cutting ferrule 41 and is run through the first opening 411 at cutting ferrule 41 both ends, and first opening 411 is linked together with the toper through-hole and can supply cable 6 to pass through.

The clip 42 is a conical structure formed by buckling two symmetrical clamping plates oppositely; the clip 42 is inserted into the tapered through hole, and the taper of the clip 42 is equal to that of the tapered through hole.

The inner wall of the third sleeve 43 is provided with an internal thread matched with the external thread on the clamping sleeve 41, the outer wall of the third sleeve 43 is provided with a second opening 431 penetrating through the two ends of the third sleeve, and the second opening 431 is communicated with the cavity inside the third sleeve 43 and can be used for the cable 6 to pass through. The third sleeve 43 is sleeved on the outer wall of the clamping sleeve 41 and is in threaded connection with the clamping sleeve 41, and the second opening 431 is dislocated from the first opening 411, so that the cable 6 in the cable clamp 4 is prevented from being pulled out of the first opening 411.

Through the conical through hole of the clamping sleeve 41 and the conical structural design of the clamp 42, when the cable 6 is subjected to counter tension, the tension is larger, the cable clamp 4 is clamped tightly with the cable 6, and the situation that the cable 6 is stressed to be separated from the cable clamp 4 is effectively avoided.

The two opposite sides of the cable clamp 4 are respectively provided with a columnar rod 44, the piston rods 23 of the two hydraulic cylinders 2 are respectively connected to the two columnar rods 44 through the lower connecting piece 3, and the columnar rods 44 are pushed to move by stretching of the piston rods 23 so as to reversely pull the cable 6.

Example 2

The number of the hydraulic cylinders 2 is changed to one based on the embodiment 1 (see fig. 7), and the cable 6 can be controllably pulled back at this time, but since only one hydraulic cylinder 2 can be pulled back on one side of the cable 6, the cable 6 is easily stressed unstably.

Finally, it should be noted that: the above embodiments and examples are only for illustrating the technical solution of the present invention, but not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments and examples, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments or examples can be modified or some of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the embodiments or examples.

Claims (10)

1. The quick reverse pulling device for the pressurized operation cable is characterized by comprising a hydraulic cylinder, wherein an upper connecting piece is connected to a cylinder body of the hydraulic cylinder and is used for fixedly connecting the hydraulic cylinder to a lubricator; the hydraulic cylinder is characterized in that a lower connecting piece is connected to a piston rod of the hydraulic cylinder, a cable clip is fixedly connected to the lower connecting piece, and the cable clip is used for fixing a cable extending out of the lubricator.

2. The quick reverse pulling device for a cable under pressure according to claim 1, wherein the upper connecting piece comprises a tubular joint, an outer wall of the tubular joint is provided with an external thread or an inner wall of the tubular joint is provided with an internal thread, and the tubular joint is in threaded connection with the lubricator through the external thread or the internal thread; the side wall of the tubular joint is provided with a groove penetrating through two ends of the tubular joint, and the groove is communicated with the space inside the tubular joint and can be used for a cable to pass through; the hydraulic cylinders are provided with two, the cylinder bodies of the two hydraulic cylinders are respectively fixedly connected to the tubular connector and located on two sides of the axis of the tubular connector, the two hydraulic cylinders are parallel to the axis direction of the tubular connector, and the piston rods of the two hydraulic cylinders are respectively fixedly connected to the cable clamps and located on two opposite sides of the cable clamps.

3. The quick reverse pulling device for a cable under pressure according to claim 2, wherein the upper connecting piece further comprises a supporting plate fixedly installed at the bottom of the tubular joint, a notch through which the cable can pass is formed in one side of the supporting plate, and the notch is communicated with the groove and extends to the axial direction of the joint; the two hydraulic cylinders are fixedly arranged at the bottom of the supporting plate and are positioned at two sides of the notch.

4. The quick reverse device for a pressurized working cable according to claim 1, wherein the upper connector is connected with the hydraulic cylinder through a quick-fit joint.

5. The quick reverse pull device for a pressurized working cable of claim 4, wherein the quick mount connector includes a female connector, a male connector, a ball, and a first sleeve;

the female connector is provided with an annular groove;

the male connector is provided with a cavity for inserting the female connector, the male connector is provided with a plurality of mounting holes, the mounting holes penetrate through the outer surface of the male connector and the inner wall of the cavity, and an outer hole and an inner hole are respectively formed on the outer surface of the male connector and the inner wall of the cavity; the outer surface of the male connector is also provided with external threads;

the sphere is arranged in the mounting hole, and the diameter of the sphere is smaller than the aperture of the outer hole and larger than the depth of the mounting hole and the aperture of the inner hole;

a stepped hole is formed in the first sleeve, the stepped hole comprises a large hole section with a larger diameter and a small hole section with a smaller diameter, an internal thread matched with the external thread is formed in the small hole section, and the first sleeve is sleeved on the male connector and is in threaded connection with the male connector;

when the small Kong Duanwei of the first sleeve is at the outer aperture, the first sleeve presses the ball into the annular groove of the female connector; when the large hole section of the first sleeve is positioned at the outer hole, the ball body can be completely separated from the annular groove of the female connector by pulling the female connector.

6. The quick reverse pulling device for a cable under pressure according to claim 1, wherein the lower connector comprises a connector link and a second sleeve; the connecting buckle comprises an arc-shaped body, the arc-shaped body is clamped on the cable clamp, the arc-shaped body comprises a first end and a second end, the first end is provided with a mounting column, and the mounting column is provided with external threads and screw holes;

the inner cavity of the second sleeve comprises a cylindrical cavity and a horn-shaped cavity which are communicated, an inner thread matched with the outer thread of the mounting column is arranged in the cylindrical cavity, and the horn-shaped cavity is gradually enlarged from inside to outside; the second sleeve is sleeved on the mounting column and is in threaded connection with the mounting column, and the second end of the arc-shaped body can extend into the horn-shaped cavity of the second sleeve and is abutted against the inner wall of the horn-shaped cavity;

the piston rod is provided with external threads, and the piston is screwed into the screw hole to be in threaded connection with the first end.

7. The quick reverse pulling device for a cable under pressure according to claim 6, wherein the arc-shaped body comprises a first clamping block and a second clamping block which are hinged into a whole, wherein one end of the first clamping block away from the hinged position is a first end of the arc-shaped body, and one end of the second clamping block away from the hinged position is a second end of the arc-shaped body.

8. The quick reverse pulling device for a cable under pressure according to claim 1, wherein the cable clip comprises a ferrule and a clip; the clamping sleeve is of a columnar structure, a conical through hole extending along the axial direction of the clamping sleeve is formed in the clamping sleeve, a first opening penetrating through two ends of the clamping sleeve is formed in the outer wall of the clamping sleeve, and the first opening is communicated with the conical through hole and can be used for the cable to pass through; the clip comprises two symmetrical clamping plates, and the two clamping plates are buckled to form a conical structure; the clamp is inserted in the conical through hole, and the taper of the clamp is equal to that of the conical through hole.

9. The quick reverse pulling device for a cable under pressure according to claim 8, wherein the cable clip further comprises a third sleeve, the inner wall of the third sleeve is provided with internal threads, the outer wall of the third sleeve is provided with a second opening penetrating through two ends of the third sleeve, and the second opening is communicated with a cavity inside the third sleeve and can be used for the cable to pass through; the cutting sleeve is provided with external threads matched with the internal threads of the third sleeve, the third sleeve is sleeved on the outer wall of the cutting sleeve and is in threaded connection with the cutting sleeve, and the second opening is staggered with the first opening.

10. The quick reverse pulling device for a pressurized working cable according to claim 1, further comprising a hydraulic system connected to the hydraulic cylinder, wherein the hydraulic system is used for controlling and calculating the magnitude of the hydraulic cylinder pressure.