Seabed stretcher with auxiliary locking structure

Abstract

The seabed stretcher with the auxiliary locking structure comprises a hydraulic pump, a pressure gauge, a stretching body and a high-pressure hose, the stretching body is composed of a piston cylinder, a piston and a stretching nut, the piston is connected with the piston cylinder in a sliding mode, the upper end face of the piston abuts against the lower end face of the stretching nut, and the stretching nut is of a split structure. Comprising a first split stretching nut and a second split stretching nut, the first split stretching nut and the second split stretching nut are connected through a connecting structure, an auxiliary locking structure is arranged on the stretcher, and the auxiliary locking structure comprises an inclined face and a locking face. According to the seabed stretcher with the auxiliary locking structure, the stability of the locking structure of the split type stretching nut can be ensured through the stretching nut and a circular truncated cone structure on the piston, the locking effect of the stretching nut is better, the stretcher is made of an anti-corrosion material, the use state of the stretcher can be improved, and the service life of the stretcher is prolonged. And the service life of the tensioner is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of stretchers, especially to a subsea stretcher with an auxiliary locking structure. BACKGROUND

[0002] The hydraulic stretcher provides a hydraulic source by means of a hydraulic booster pump (ultra-high pressure hydraulic pump), determines the stretching force according to the tensile strength, yield coefficient and elongation of the material, uses the stretching force generated by the ultra-high pressure oil pump to make the bolt subjected to force be elongated in its elastic deformation zone, and slightly deforms the bolt diameter, so that the nut is easy to loosen.

[0003] The bolt stretcher is generally composed of a hydraulic pump, a high-pressure hose, a pressure gauge and a stretching body. The hydraulic pump is the power source, the pressure gauge reflects the output pressure of the pump, and the high-pressure hose connects the hydraulic pump and the stretching body. The stretching body is an execution element for realizing bolt stretching, mainly composed of a piston cylinder, a piston, a supporting bridge and a stretching nut.

[0004] The hydraulic stretcher is commonly used in the fields of petroleum and chemical industry, nuclear power, wind power, hydroelectric power, thermal power, ships, railways, aerospace, mining, heavy machinery, etc. According to different working conditions and user requirements, special stretcher design can be made.

[0005] In particular, the application of the hydraulic stretcher in the deep sea field will cause the following technical problems:

[0006] (1) The stretcher is applied in the deep sea and needs to be operated in seawater, which has high salt content. The stretcher is made of metal, so it is easy to be corroded, affecting the service life and use effect;

[0007] (2) The stretcher is applied in the deep sea, the visibility of the deep sea is poor, and the stroke of the bolt is long. If the traditional stretching nut is used, the stretching nut and the bolt are difficult to cooperate, and the worker needs to twist the stretching nut for a long time, which increases the operation difficulty of the worker and affects the work efficiency of the worker. SUMMARY

[0008] The utility model aims at the demand of improving the work efficiency of the worker, ensuring the service life of the stretcher and reducing the operation difficulty of the worker, and constructs a subsea stretcher with an auxiliary locking structure with a split type structure based on the existing stretcher.

[0009] The utility model provides a sub -sea tensioner with auxiliary locking structure, including the hydraulic pump of power source for the work of tensioner, the pressure gauge of reaction the output pressure of hydraulic pump, the tensioning body of realizing bolt tension and the high pressure hose of connecting hydraulic pump and tensioning body, tensioning body is composed of piston cylinder, piston and tensioning nut, piston and piston cylinder slide connection, the inside of piston cylinder is equipped with the thread of bolt connection, the upper end surface of piston and the lower end surface of tensioning nut are opposite, the inside of tensioning nut is equipped with the thread of bolt connection, its characterized in being, tensioning nut sets up as split structure, including first split tensioning nut and second split tensioning nut, first split tensioning nut and second split tensioning nut are connected through connecting structure,

[0010] In order to make split type tensioning nut structure more stable, auxiliary locking structure is arranged on the tensioner,

[0011] The lower side of the tensioning nut is an inwardly inclined slope, and the upper side of the piston opposite to the slope is provided with a locking surface matched with the slope,

[0012] The auxiliary locking structure includes the slope and the locking surface.

[0013] Further, the first split tensioning nut is provided with a first arc-shaped groove with an opening facing the second split tensioning nut, the groove wall of the first arc-shaped groove is provided with threads, and the size of the first arc-shaped groove corresponds to the size of the bolt.

[0014] Further, the second split tensioning nut is provided with a second arc-shaped groove with an opening facing the first split tensioning nut, the groove wall of the second arc-shaped groove is provided with threads, and the size of the second arc-shaped groove corresponds to the size of the bolt.

[0015] Since the tensioning nut adopts a split type nut that can be locked or unlocked, the structure of the tensioning nut is unstable.

[0016] Further, the piston applies a radial force directed to the axis of the bolt to the first split tensioning nut and the second split tensioning nut. The radial force can make the structure of the tensioning nut more stable when locking the bolt, and the locking effect of the tensioning nut is better.

[0017] Further, when the tensioning nut is in a locked state, the inclined surfaces of the first split tensioning nut and the second split tensioning nut opposite to the piston form a first circular truncated cone with a groove, and the inclination angle of the first circular truncated cone is 45°.

[0018] Further, the groove on the first circular truncated cone passes through the position of the axis of the bolt.

[0019] Further, the locking surface of the piston abutting against the stretching nut forms a second circular truncated cone, the inclination angle of the second circular truncated cone is 45°, and the first circular truncated cone is engaged with the second circular truncated cone.

[0020] Further, the circular truncated cone comprises an upper base, a lower base and a generatrix, the upper base of the first circular truncated cone is S1, the lower base is S2, and the generatrix is L1, the upper base of the second circular truncated cone is S3, the lower base is S4, and the generatrix is L2,

[0021] S1 > S2,

[0022] S3 > S4,

[0023] S1 > S3,

[0024] S2 = S4,

[0025] L1 > L2.

[0026] Further, the stretching device is made of corrosion-resistant material.

[0027] Further, the connecting structure can adopt a sliding sleeve structure, a bolt and nut structure, a buckle structure, etc., and preferably a sliding sleeve structure, which is simple and convenient to operate.

[0028] Specifically, the sliding sleeve structure comprises a driving locking part and a driven locking part, and the locking or unlocking state of the driven locking part changes with the locking or unlocking state of the driving locking part.

[0029] The first part of the stretching nut is provided with a first driving cooperation cavity and a first driven cooperation cavity, the second part of the stretching nut is provided with a second driving cooperation cavity and a second driven cooperation cavity, the positions of the first driving cooperation cavity and the second driving cooperation cavity correspond, and the positions of the first driven cooperation cavity and the second driven cooperation cavity correspond,

[0030] The driving locking part is arranged at the positions of the first driving cooperation cavity and the second driving cooperation cavity, and the driven locking part is arranged at the positions of the first driven cooperation cavity and the second driven cooperation cavity.

[0031] The driving locking part comprises a first sliding sleeve and a first sliding rod, the first sliding sleeve is internally provided with a first sliding cavity, the first sliding rod is slidingly arranged in the first sliding cavity, one end of the first sliding rod is fixedly provided with a switch extending to the outside of the stretching nut, and the other end of the first sliding rod is connected with the first sliding cavity through a first compression spring.

[0032] One end of the first sliding sleeve and the first sliding rod is limited by the first driving cooperation cavity, the outside of the first sliding sleeve is provided with a first limiting piece, and the first limiting piece and the first driving cooperation cavity are connected through a second compression spring.

[0033] One end of the first limiting piece always abuts against the second split stretch nut.

[0034] When the stretch nut is in the unlocked state, the other end of the first sliding sleeve is limited by the second active cooperation cavity,

[0035] The first sliding sleeve is provided with a steel ball groove, and the first sliding rod is provided with an annular groove,

[0036] The second active cooperation cavity is provided with a limiting steel ball, and when the stretch nut is in the locked state, the limiting steel ball is clamped between the second active cooperation cavity and the steel ball groove; when the stretch nut is in the unlocked state, the limiting steel ball is clamped between the steel ball groove and the annular groove.

[0037] The driven locking part comprises a second sliding rod, the second sliding rod is provided with a second limiting piece outside, one end of the second limiting piece always abuts against the second split stretch nut, and a third compression spring is connected between the second limiting piece and the first driven cooperation cavity,

[0038] One end of the second sliding rod is limited by the first driven cooperation cavity,

[0039] When the stretch nut is in the unlocked state, the other end of the second sliding rod is limited by the second driven cooperation cavity.

[0040] The beneficial effects of the utility model lie in: the sub-auxiliary locking structure's seabed stretcher of the application can be through the below of stretch nut is circular table structure, and the circular table structure above piston, make stretch nut in received piston to it produced radial force, make split type stretch nut not to break open when working, further ensure the stability of split type stretch nut's locking structure, make the locking effect of stretch nut better, and the stretcher is made of anticorrosive material, can improve the use state of stretcher, and increase the service life of stretcher.

[0041] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, which can be implemented according to the content of the specification, and in order to let the above and other purposes, characteristics and advantages of the utility model can be more obvious and easy to understand, the following preferred embodiments are taken, and the detailed description is as follows. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0043] Figure 1 is the overall structure schematic diagram of a specific example of the stretching device of the present application;

[0044] Figure 2 is the cross-sectional structure schematic diagram of Figure 1 ;

[0045] Figure 3 is the cross-sectional schematic diagram of the stretching nut in a specific example of the stretching device of the present application;

[0046] Figure 4 is the cross-sectional schematic diagram of the piston cylinder and the piston in a specific example of the stretching device of the present application;

[0047] Figure 5 is the cross-sectional structure schematic diagram of the sliding sleeve structure in the locked state in a specific example of the stretching device of the present application;

[0048] Figure 6 is the cross-sectional structure schematic diagram of the sliding sleeve structure in the unlocked state in a specific example of the stretching device of the present application;

[0049] Figure 7 is the structure schematic diagram of the driving locking part in Figure 5 ;

[0050] Figure 8 is the structure schematic diagram of the driving locking part in Figure 6 ;

[0051] Figure 9 is the structure schematic diagram of the driven locking part in Figure 5 ;

[0052] Figure 10 is the structure schematic diagram of the driven locking part in Figure 6 ;

[0053] In the figure: 101, piston cylinder; 102, stretching nut; 104, threaded hole; 105, piston; 106, second arc-shaped groove; 108, oil cavity; 109, first part stretching nut; 110, second part stretching nut; 112, first sliding rod; 113, first sliding sleeve; 115, second compression spring; 116, first limiting piece; 118, limiting steel ball; 120, steel ball groove; 121, first compression spring; 122, first sliding cavity; 124, second sliding rod; 125, third compression spring; 129, second limiting piece; 130, annular groove; 131, locking surface; 132, inclined surface; 133, first arc-shaped groove; 201, driven locking part; 202, driving locking part. DETAILED DESCRIPTION

[0054] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clearly understood, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and do not limit the utility model.

[0055] The utility model of a subsea stretcher with an auxiliary locking structure will be further described in combination with the drawings.

[0056] The stretcher described in the present embodiment includes a hydraulic pump that improves the power source for the operation of the stretcher, a pressure gauge that reacts to the output pressure of the hydraulic pump, a stretching body that realizes bolt stretching, and a high-pressure hose that connects the hydraulic pump and the stretching body.

[0057] As shown in Figure 1 and Figure 2 , the stretching body is composed of a piston cylinder 101, a piston 105 and a stretching nut 102. The piston cylinder 101 is provided with an oil cavity 108, and the piston 105 is slidingly arranged in the oil cavity 108. The inner side of the piston cylinder 101 is provided with threads for connecting with a bolt. The upper part of the stretching nut 102 abuts against the lower part of the piston 105, and the inner side of the piston 105 is provided with threaded holes 104 for connecting with a bolt.

[0058] As shown in Figure 3 and Figure 4 , the stretching nut 102 is provided in a split structure, including a first part stretching nut 109 and a second part stretching nut 110. The first part stretching nut 109 and the second part stretching nut 110 are connected through a connecting structure. The lower part of the stretching nut 102 is an inclined surface 132 that inclines inwardly, and the upper part of the piston 105 that abuts against the stretching nut 102 is a locking surface 131 that cooperates with the inclined surface 132.

[0059] The connecting structure described above adopts a sliding sleeve structure in the present embodiment.

[0060] The first arc-shaped slot 133 is provided on the first split stretch nut 109, and the slot wall of the first arc-shaped slot 133 is provided with threads, and the size of the first arc-shaped slot 133 corresponds to the size of the bolt.

[0061] The second arc-shaped slot 106 is provided on the second split stretch nut 110, and the slot wall of the second arc-shaped slot 106 is provided with threads, and the size of the second arc-shaped slot 106 corresponds to the size of the bolt.

[0062] The piston 105 exerts a radial force on the first split stretch nut 109 and the second split stretch nut 110, which is directed towards the axis. This radial force can make the stretch nut 102 more stable when locking the bolt, and make the locking effect of the stretch nut 102 better.

[0063] When the stretch nut 102 is in the unlocked state, the inclined surface of the stretch nut 102 abutting against the piston 105 forms a first circular truncated cone with a groove, the inclination angle of the first circular truncated cone is 45°, and the groove on the first circular truncated cone passes through the central axis of the first circular truncated cone.

[0064] The locking surface of the piston 105 abutting against the stretch nut 102 forms a second circular truncated cone, and the inclination angle of the second circular truncated cone is 45°.

[0065] The circular truncated cone includes an upper base, a lower base and a generatrix. The upper base of the first circular truncated cone is S1, the lower base is S2, and the generatrix is L1. The upper base of the second circular truncated cone is S3, the lower base is S4, and the generatrix is L2.

[0066] S1>S2,

[0067] S3>S4,

[0068] S1>S3,

[0069] S2=S4,

[0070] L1>L2.

[0071] The stretch nut described above is made of corrosion-resistant material.

[0072] The sliding sleeve structure has two states of locking and unlocking. The locking state is shown in Figure 5 , and the unlocking state is shown in Figure 6 . The locking state and the unlocking state of the sliding sleeve structure are controlled to control the integrated state and the split state of the stretch nut 102.

[0073] The sliding sleeve structure includes a driving locking part 202 and a driven locking part 201. The locking or unlocking state of the driven locking part 201 changes with the change of the locking or unlocking state of the driving locking part 202.

[0074] As Figures 7-10 shown, the second body stretch nut 109 is provided with a first active matching cavity and a first driven matching cavity, and the first body stretch nut 110 is provided with a second active matching cavity and a second driven matching cavity. The first active matching cavity corresponds to the position of the second active matching cavity, and the first driven matching cavity corresponds to the position of the second driven matching cavity.

[0075] The active locking part 202 is arranged at the position of the first active matching cavity and the second active matching cavity, and the driven locking part 201 is arranged at the position of the first driven matching cavity and the second driven matching cavity.

[0076] The active locking part 202 includes a first sliding sleeve 113 and a first sliding rod 112. The first sliding sleeve 113 is internally provided with a first sliding cavity 122, and the first sliding rod 112 is slidingly arranged in the first sliding cavity 122. One end of the first sliding rod 112 is fixedly provided with a switch 111 extending to the outside of the first body stretch nut 110, and the other end of the first sliding rod 112 is connected with the first sliding cavity 122 through a first compression spring 121.

[0077] The first active matching cavity is a two-stage ladder shape. The first stage is away from one side of the first body stretch nut 110, and the second stage is close to the other side of the first body stretch nut 110. The diameter of the first active matching cavity at the first stage is smaller than that at the second stage.

[0078] The first sliding sleeve 113 and the one end of the first sliding rod 112 are limited by the first stage of the first active matching cavity.

[0079] The outside of the first sliding sleeve 113 is provided with a first limiting piece 116, and the first limiting piece 116 is connected with the second stage of the first active matching cavity through a second compression spring 115.

[0080] One end of the first limiting piece 116 is always in contact with the first body stretch nut 110.

[0081] The second active matching cavity is a two-stage ladder shape. The first stage is away from one side of the second body stretch nut 109, and the second stage is close to the other side of the second body stretch nut 109. The diameter of the second active matching cavity at the first stage is larger than that at the second stage.

[0082] When the stretch nut 102 is in an unlocked state, the other end of the first sliding sleeve 113 can be limited by the first stage of the second active matching cavity.

[0083] The first sliding sleeve 113 is provided with a steel ball groove 120, and the first sliding rod 112 is provided with an annular groove 130.

[0084] The second active cooperation cavity is provided with a limiting steel ball 118. When the stretch nut 102 is in the locked state, the limiting steel ball 118 is clamped between the second step of the second active cooperation cavity and the steel ball groove 120. When the stretch nut 102 is in the unlocked state, the limiting steel ball 118 is clamped between the steel ball groove 120 and the annular groove 130.

[0085] The first driven cooperation cavity is a two-step cavity. The first step is away from the first stretch nut 110, and the second step is close to the first stretch nut 110. The diameter of the first step of the first driven cooperation cavity is smaller than the diameter of the second step of the first driven cooperation cavity.

[0086] The driven locking part 201 includes a second slide rod 124. The second slide rod 124 is provided with a second limiting part 129. One end of the second limiting part 129 is always in contact with the first stretch nut 110. The second limiting part 129 and the second step of the first driven cooperation cavity are connected by a third compression spring 125.

[0087] One end of the second slide rod 124 is limited by the first driven cooperation cavity.

[0088] The second driven cooperation cavity is a two-step cavity. The first step is away from the second stretch nut 109, and the second step is close to the second stretch nut 109. The diameter of the first step of the second driven cooperation cavity is larger than the diameter of the second step of the second driven cooperation cavity.

[0089] When the stretch nut 102 is in the unlocked state, the other end of the second slide rod 124 is limited by the first step of the second driven cooperation cavity.

[0090] When the above-mentioned stretcher starts working,

[0091] (1) The bolt passes through the piston cylinder 101, and the stretch body is arranged at a specified position;

[0092] (2) The stretch nut 102 in the unlocked state is arranged at the specified position of the bolt;

[0093] (3) The staff squeezes the second stretch nut 109 and the first stretch nut 110 to the middle, so that the limiting steel ball 118 is clamped between the second step of the second active cooperation cavity and the steel ball groove 120, and the stretch nut 102 changes to the locked state. The driven locking part 201 changes with the change of the active locking part 202;

[0094] (4) Rotate the stretch nut 102 to make it abut against the piston 103. The piston cylinder 101 is pressurized to make the piston 103 slide, and drive the stretch nut 102 to move the stretch bolt.

[0095] When it is needed to change the stretch nut 102 from the locked state to the unlocked state,

[0096] The staff presses 111, pushes the first slide rod 112 to slide in the first slide sleeve 113, and makes the limiting steel ball 118 clamped between the steel ball groove 120 and the annular groove 130, so that the stretch nut 102 is unlocked.

[0097] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A subsea tensioner with auxiliary locking structure, comprising a hydraulic pump for increasing power source for tensioner operation, a pressure gauge for reacting output pressure of the hydraulic pump, a tensioning body for realizing bolt tensioning, and a high-pressure hose for connecting the hydraulic pump and the tensioning body, the tensioning body being composed of a piston cylinder, a piston and a tensioning nut, the piston being in sliding connection with the piston cylinder, the inner side of the piston cylinder being provided with threads for bolt connection, the upper end surface of the piston being in abutment with the lower end surface of the tensioning nut, the inner side of the tensioning nut being provided with threads for bolt connection, characterized in that, The stretching nut is provided in a split structure, including a first split stretching nut and a second split stretching nut, and the first split stretching nut and the second split stretching nut are connected through a connecting structure, An auxiliary locking structure is arranged on the stretcher, An inclined surface is arranged below the stretching nut and inclines inwardly, and a locking surface matched with the inclined surface is arranged above the piston abutting against the stretching nut, The auxiliary locking structure includes the inclined surface and the locking surface.

2. The subsea tensioner with auxiliary locking structure of claim 1, wherein, A first arc-shaped groove is arranged on the first split stretching nut and opens towards the second split stretching nut, a thread is arranged on the groove wall of the first arc-shaped groove, and the size of the first arc-shaped groove corresponds to the size of the bolt.

3. The subsea tensioner with auxiliary locking structure of claim 1, wherein, A second arc-shaped groove is arranged on the second split stretching nut and opens towards the first split stretching nut, a thread is arranged on the groove wall of the second arc-shaped groove, and the size of the second arc-shaped groove corresponds to the size of the bolt.

4. The subsea tensioner with auxiliary locking structure of claim 1, wherein, The piston applies a radial force directed to the bolt axis to the first split stretching nut and the second split stretching nut.

5. The subsea tensioner with auxiliary locking structure of claim 1, wherein, The inclined surfaces of the first split stretching nut and the second split stretching nut abutting against the piston form a first grooved circular truncated cone, and the inclination angle of the first circular truncated cone is 45°.

6. The subsea tensioner with auxiliary locking structure of claim 5, wherein, The groove on the first circular truncated cone passes through the bolt axis position.

7. The subsea tensioner with auxiliary locking structure of claim 5, wherein, The locking surface of the piston abutting against the stretching nut forms a second circular truncated cone, and the inclination angle of the second circular truncated cone is 45°.

8. The subsea tensioner with auxiliary locking structure of claim 7, wherein, The circular truncated cone includes an upper base, a lower base and a generatrix, the upper base of the first circular truncated cone is S1, the lower base is S2, and the generatrix is L1, the upper base of the second circular truncated cone is S3, the lower base is S4, and the generatrix is L2, S1>S2, S3>S4, S1>S3, S2=S4, L1>L2.

9. The subsea tensioner with auxiliary locking structure of claim 7, wherein, The first circular truncated cone is engaged with the second circular truncated cone.

10. The subsea tensioner with auxiliary locking structure of claim 1, wherein, The connecting structure includes a sliding sleeve structure, a bolt and nut structure, and a buckle structure.

Images