Stretcher capable of being quickly disassembled and assembled and suitable for deep sea operation

Abstract

The utility model discloses a quick mounting and dismounting stretcher suitable for deep sea operation, which comprises a hydraulic pump, a pressure gauge, a stretching body and a high-pressure hose, the stretching body consists of a piston cylinder, a piston and a stretching nut, the piston is in sliding connection with the piston cylinder, the upper part of the piston is propped against the lower part of the stretching nut, and the stretching nut is of a split structure. Comprising a first split stretching nut body and a second split stretching nut body, the first split stretching nut body and the second split stretching nut body are connected through a sliding sleeve assembly, and the sliding sleeve assembly has a locking state and an unlocking state which are used for controlling combination and separation of the stretching nut bodies respectively. According to the quick dismounting and mounting stretcher suitable for deep sea operation, quick dismounting and mounting of the stretching nut can be achieved through the split type stretching nut structure, so that the working efficiency of workers is improved to a great extent, the difficulty of deep sea operation is reduced, the stretcher is made of an anti-corrosion material, and the tensile strength of the stretcher is improved. The use state of the tensioner can be improved, and the service life of the tensioner can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of tensioners, and in particular to a quick-release tensioner suitable for deep-sea operations. Background Technology

[0002] Hydraulic tensioners utilize the hydraulic power source provided by a hydraulic booster pump (ultra-high pressure hydraulic pump). The tensile force is determined based on the tensile strength, yield coefficient, and elongation of the material. By using the tensile force generated by the ultra-high pressure oil pump, the bolt under force is stretched within its elastic deformation zone, causing slight deformation of the bolt diameter, which makes the nut easier to loosen. In addition, it can also be used as a device to apply axial force to a hydraulic interference connection for top pressure installation.

[0003] A bolt tensioner typically consists of a hydraulic pump, a high-pressure hose, a pressure gauge, and a tensioning body. The hydraulic pump is the power source, the pressure gauge reflects the pump's output pressure, and the high-pressure hose connects the hydraulic pump and the tensioning body. The tensioning body is the actuator that performs the bolt tensioning. It mainly consists of a piston cylinder, a piston, a support bridge, and a tensioning nut.

[0004] Hydraulic tensioners are commonly used in petrochemical, nuclear power, wind power, hydropower, thermal power, shipbuilding, railway, aerospace, mining, and heavy machinery industries. Custom tensioner designs are available to meet different working conditions and user requirements.

[0005] In particular, applying hydraulic tensioners to the deep-sea field presents several technical challenges:

[0006] (1) The tensioner is used in the deep sea and needs to be immersed in seawater. The salt content of seawater is high, and the tensioner is made of metal. Therefore, the tensioner is easily corroded, which affects its service life and performance.

[0007] (2) The tensioner is used in the deep sea. The visibility in the deep sea is poor and the bolt stroke is long. If a traditional tension nut is used, it is difficult to match the tension nut with the bolt. Moreover, the time required for the staff to turn the tension nut is long, which increases the difficulty of the staff's operation and affects the staff's work efficiency. Summary of the Invention

[0008] The purpose of this invention is to construct a quick-release tensioner suitable for deep-sea operations, based on the existing tensioner and in order to improve the work efficiency of workers, ensure the life of the tensioner, and reduce the difficulty of operation for workers. The tensioner nut is a split structure.

[0009] A quick-release tensioning device suitable for deep-sea operations includes a hydraulic pump providing power for the tensioning device, a pressure gauge reflecting the output pressure of the hydraulic pump, a tensioning body for tensioning bolts, and a high-pressure hose connecting the hydraulic pump and the tensioning body. The tensioning body consists of a piston cylinder, a piston, and a tensioning nut. The piston is slidably connected to the piston cylinder. The inner side of the piston cylinder is provided with threads for bolt connection. The upper part of the piston abuts against the lower part of the tensioning nut. The inner side of the tensioning nut is also provided with threads for bolt connection. The tensioning nut is characterized by being a split structure, including a first split tensioning nut and a second split tensioning nut. The first split tensioning nut and the second split tensioning nut are connected by a sliding sleeve assembly. The sliding sleeve assembly has two states: locked and unlocked, which control the assembly and disassembly of the tensioning nut, respectively.

[0010] Furthermore, the first split tension nut is provided with a first arc-shaped groove with an opening facing the second split tension 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.

[0011] Furthermore, the second split tension nut is provided with a second arc-shaped groove with an opening facing the first split tension 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.

[0012] Furthermore, the sliding sleeve assembly includes an active locking part and a driven locking part, and the locking or unlocking state of the driven locking part changes as the locking or unlocking state of the active locking part changes.

[0013] Furthermore, the first split tension nut is provided with a first active mating cavity and a first driven mating cavity, and the second split tension nut is provided with a second active mating cavity and a second driven mating cavity. The positions of the first active mating cavity and the second active mating cavity correspond, and the positions of the first driven mating cavity and the second driven mating cavity also correspond.

[0014] The active locking part is disposed at the positions of the first active mating cavity and the second active mating cavity, and the driven locking part is disposed at the positions of the first driven mating cavity and the second driven mating cavity.

[0015] Furthermore, the active locking part includes a first sliding sleeve and a first sliding rod. The first sliding sleeve has a first sliding cavity inside, and the first sliding rod is slidably disposed in the first sliding cavity. One end of the first sliding rod is fixedly provided with a switch extending to the outside of the tension nut, and the other end of the first sliding rod is connected to the first sliding cavity with a first compression spring.

[0016] One end of the first sliding sleeve and the first sliding rod is limited by the first active mating cavity. A first limiting member is provided on the outside of the first sliding sleeve. The first limiting member is connected to the first active mating cavity by a second compression spring.

[0017] One end of the first limiting member is always abutting against the second split tension nut.

[0018] With the tension nut in the unlocked state, the other end of the first sliding sleeve can be limited by the second active engagement cavity.

[0019] The first sliding sleeve is provided with a ball bearing groove, and the first sliding rod is provided with an annular groove.

[0020] The second active mating cavity is provided with a limiting steel ball. When the tension nut is locked, the limiting steel ball is locked between the second active mating cavity and the steel ball groove; when the tension nut is unlocked, the limiting steel ball is locked between the steel ball groove and the annular groove.

[0021] Furthermore, the driven locking part includes a second slide rod, and a second limiting member is provided outside the second slide rod. One end of the second limiting member always abuts against the second split tension nut. A third compression spring is connected between the second limiting member and the first driven mating cavity.

[0022] One end of the second slide rod is limited by the first driven mating cavity.

[0023] With the tension nut in the unlocked state, the other end of the second slide rod is limited by the second driven engagement cavity.

[0024] Furthermore, the aforementioned tensioner is made of corrosion-resistant materials.

[0025] The beneficial effects of this utility model are as follows: The quick-release tensioner disclosed in this application, suitable for deep-sea operations, uses a split tension nut structure, allowing workers to move or remove the tension nut directly from its working position without having to rotate it repeatedly when installing it. Furthermore, the opening and closing states of the tension nut change the engagement state between the tension nut and the bolt, enabling rapid installation and removal of the tension nut. This greatly improves the work efficiency of workers and reduces the difficulty of deep-sea operations. Moreover, the tensioner is made of corrosion-resistant materials, which improves its performance and extends its service life.

[0026] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of a specific example of the tensioner of this utility model;

[0029] Figure 2 This is a cross-sectional structural diagram of the tension nut in the locked state in a specific example of the tensioner of this utility model.

[0030] Figure 3 This is a cross-sectional structural diagram of the tension nut in the unlocked state in a specific embodiment of the tensioner of this utility model;

[0031] Figure 4 yes Figure 2 Schematic diagram of the active locking part;

[0032] Figure 5 yes Figure 3 Schematic diagram of the active locking part;

[0033] Figure 6 yes Figure 2 Schematic diagram of the driven locking part;

[0034] Figure 7 yes Figure 3 Schematic diagram of the driven locking part;

[0035] In the diagram: 101, Piston cylinder; 102, Tension nut; 103, Piston; 106, Split-type threaded hole; 109, Second split-type tension nut; 110, First split-type tension nut; 112, First slide rod; 113, First sliding sleeve; 115, Second compression spring; 116, First limiting member; 118, Limiting steel ball; 120, Steel ball groove; 121, First compression spring; 122, First sliding cavity; 124, Second slide rod; 125, Third compression spring; 129, Second limiting member; 130, Annular groove; 201, Driven locking part; 202, Active locking part. Detailed Implementation

[0036] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0037] The following description, in conjunction with the accompanying drawings, further illustrates a quick-release and installation tensioner suitable for deep-sea operations based on this utility model.

[0038] The tensioner described in this embodiment includes a hydraulic pump that provides a power source for the tensioner's operation, a pressure gauge that reflects the output pressure of the hydraulic pump, a tensioning body that achieves bolt tensioning, and a high-pressure hose connecting the hydraulic pump and the tensioning body.

[0039] like Figure 1 As shown, the tensioning body consists of a piston cylinder 101, a piston 103, and a tensioning nut 102. The piston cylinder 101 has an oil chamber, and the piston 103 is slidably disposed in the oil chamber. The inner side of the piston cylinder 101 is provided with a thread for bolt connection. The upper part of the piston 103 abuts against the lower part of the tensioning nut 102, and the inner side of the tensioning nut 102 is provided with a thread for bolt connection.

[0040] like Figure 2 and Figure 3 As shown, the tension nut 102 is configured as a split structure, including a first split tension nut 110 and a second split tension nut 109. The first split tension nut 110 and the second split tension nut 109 are connected by a sliding sleeve assembly. The sliding sleeve assembly has two states: locked and unlocked. The locked state is as follows: Figure 2 As shown, the unlocked state is as follows Figure 3 As shown, the locked and unlocked states of the sliding sleeve assembly control the assembled and disassembled states of the tension nut 102. The first disassembled tension nut 110 has a first arc-shaped groove with an opening facing the second disassembled tension nut 109. The groove wall of the first arc-shaped groove is threaded, and the size of the first arc-shaped groove corresponds to the size of the bolt. The second disassembled tension nut 109 has a second arc-shaped groove with an opening facing the first disassembled tension nut 110. The groove wall of the second arc-shaped groove is threaded, and the size of the second arc-shaped groove corresponds to the size of the bolt.

[0041] The first arc-shaped groove on the first split tension nut 110 and the second arc-shaped groove on the second split tension nut 109 form a split threaded hole 106, which can engage with the bolt.

[0042] The sliding sleeve assembly includes an active locking part 202 and a driven locking part 201. The locked or unlocked state of the driven locking part 201 changes as the locked or unlocked state of the active locking part 202 changes.

[0043] like Figures 4-7 As shown, the first split tension nut 110 is provided with a first active mating cavity and a first driven mating cavity, and the second split tension nut 109 is provided with a second active mating cavity and a second driven mating cavity. The positions of the first active mating cavity and the second active mating cavity are corresponding, and the positions of the first driven mating cavity and the second driven mating cavity are corresponding.

[0044] The active locking part 202 is disposed at the positions of the first active mating cavity and the second active mating cavity, and the driven locking part 201 is disposed at the positions of the first driven mating cavity and the second driven mating cavity.

[0045] The active locking part 202 includes a first sliding sleeve 113 and a first sliding rod 112. The first sliding sleeve 113 has a first sliding cavity 122 inside. The first sliding rod 112 is slidably disposed 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 split tension nut 110. The other end of the first sliding rod 112 is connected to the first sliding cavity 122 with a first compression spring 121.

[0046] The first active mating cavity is a connected two-stage stepped structure. The first-stage step is the side away from the second split tension nut 109, and the second-stage step is the side closer to the second split tension nut 109. The diameter of the first active mating cavity at the first-stage step is smaller than the diameter of the first active mating cavity at the second-stage step.

[0047] One end of the first sliding sleeve 113 and the first sliding rod 112 is limited by the first step of the first active mating cavity.

[0048] The first sliding sleeve 113 is provided with a first limiting member 116 on its outside. The first limiting member 116 is connected to the second step of the first active mating cavity by a second compression spring 115.

[0049] One end of the first limiting member 116 is always abutted against the second split tension nut 109.

[0050] The second active mating cavity is a connected two-stage stepped structure. The first-stage step is the side away from the first split tension nut 110, and the second-stage step is the side closer to the first split tension nut 110. The diameter of the second active mating cavity at the first-stage step is larger than the diameter of the second active mating cavity at the second-stage step.

[0051] When the tension nut 102 is in the unlocked state, the other end of the first sliding sleeve 113 can be limited by the first-level step of the second active mating cavity.

[0052] 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.

[0053] The second active mating cavity is provided with a limiting steel ball 118. When the tension nut 102 is locked, the limiting steel ball 118 is locked between the secondary step of the second active mating cavity and the steel ball groove 120. When the tension nut 102 is unlocked, the limiting steel ball 118 is locked between the steel ball groove 120 and the annular groove 130.

[0054] The first driven mating cavity is a connected two-stage stepped structure. The first-stage step is the side away from the second split tension nut 109, and the second-stage step is the side closer to the second split tension nut 109. The diameter of the first driven mating cavity at the first-stage step is smaller than the diameter of the first driven mating cavity at the second-stage step.

[0055] The driven locking part 201 includes a second slide rod 124. A second limiting member 129 is provided outside the second slide rod 124. One end of the second limiting member 129 is always in contact with the second split tension nut 109. A third compression spring 125 is connected between the second limiting member 129 and the second step of the first driven mating cavity.

[0056] One end of the second slide bar 124 is limited by the first driven mating cavity.

[0057] The second driven mating cavity is a connected two-stage stepped structure. The first-stage step is the side away from the first split tension nut 110, and the second-stage step is the side closer to the first split tension nut 110. The diameter of the second driven mating cavity at the first-stage step is larger than the diameter of the second driven mating cavity at the second-stage step.

[0058] With the tension nut 102 in the unlocked state, the other end of the second slide bar 124 is limited by the first step of the second driven mating cavity.

[0059] When the aforementioned tensioner starts working,

[0060] (1) Pass the bolt through the piston cylinder 101 and position the tensioning body at the designated location;

[0061] (2) Place the tension nut 102 in the unlocked state at the designated position on the bolt;

[0062] (3) The workers squeeze the second split tension nut 109 and the first split tension nut 110 towards the middle, so that the limiting steel ball 118 is locked between the second-level step and the steel ball groove 120 of the second active mating cavity, so that the tension nut 102 is changed to the locked state, and the driven locking part 201 changes with the change of the state of the active locking part 202.

[0063] (4) Rotate the tension nut 102 to make it abut against the piston 103. The piston cylinder 101 is pressurized to make the piston 103 slide, which drives the tension nut 102 to move the tension bolt.

[0064] When it is necessary to change the tension nut 102 from the locked state to the unlocked state

[0065] The staff presses 111, pushing the first slide bar 112 to slide within the first slide sleeve 113, causing the limiting steel ball 118 to be locked between the steel ball groove 120 and the annular groove 130, thus unlocking the tension nut 102.

[0066] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick-release tensioning device suitable for deep-sea operations, comprising a hydraulic pump providing power for the tensioning device, a pressure gauge reflecting the output pressure of the hydraulic pump, a tensioning body for tensioning bolts, and a high-pressure hose connecting the hydraulic pump and the tensioning body. The tensioning body consists of a piston cylinder, a piston, and a tensioning nut. The piston is slidably connected to the piston cylinder. The inner side of the piston cylinder is provided with threads for bolt connection. The upper part of the piston abuts against the lower part of the tensioning nut. The inner side of the tensioning nut is provided with threads for bolt connection. The device is characterized in that... The tension nut is configured as a split structure, including a first split tension nut and a second split tension nut. The first split tension nut and the second split tension nut are connected by a sliding sleeve assembly. The sliding sleeve assembly has two states: locked and unlocked, which control the assembly and disassembly of the tension nut, respectively.

2. The quick-release tensioner for deep-sea operations according to claim 1, characterized in that, The first split tension nut has a first arc-shaped groove with an opening facing the second split tension nut. The groove wall of the first arc-shaped groove is threaded, and the size of the first arc-shaped groove corresponds to the size of the bolt.

3. The quick-release tensioner suitable for deep-sea operations according to claim 2, characterized in that, The second split tension nut is provided with a second arc-shaped groove with an opening facing the first split tension 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.

4. The quick-release tensioner for deep-sea operations according to claim 1, characterized in that, The sliding sleeve assembly includes an active locking part and a driven locking part, and the locking or unlocking state of the driven locking part changes as the locking or unlocking state of the active locking part changes.

5. A quick-release tensioner suitable for deep-sea operations according to claim 4, characterized in that, The first split tension nut has a first active mating cavity and a first driven mating cavity, and the second split tension nut has a second active mating cavity and a second driven mating cavity. The positions of the first active mating cavity and the second active mating cavity correspond, and the positions of the first driven mating cavity and the second driven mating cavity also correspond. The active locking part is disposed at the positions of the first active mating cavity and the second active mating cavity, and the driven locking part is disposed at the positions of the first driven mating cavity and the second driven mating cavity.

6. The quick-release tensioner for deep-sea operations according to claim 5, characterized in that, The active locking part includes a first sliding sleeve and a first sliding rod. The first sliding sleeve has a first sliding cavity inside, and the first sliding rod is slidably disposed in the first sliding cavity. One end of the first sliding rod is fixedly provided with a switch extending to the outside of the tension nut, and the other end of the first sliding rod is connected to the first sliding cavity with a first compression spring. One end of the first sliding sleeve and the first sliding rod is limited by the first active mating cavity. A first limiting member is provided on the outside of the first sliding sleeve. The first limiting member is connected to the first active mating cavity by a second compression spring. One end of the first limiting member is always abutting against the second split tension nut.

7. A quick-release tensioner suitable for deep-sea operations according to claim 6, characterized in that, When the tension nut is in the unlocked state, the other end of the first sliding sleeve can be limited by the second active mating cavity.

8. A quick-release tensioner suitable for deep-sea operations according to claim 6, characterized in that, The first sliding sleeve is provided with a steel ball groove, the first sliding rod is provided with an annular groove, and the second active mating cavity is provided with a limiting steel ball. When the tension nut is locked, the limiting steel ball is locked between the second active mating cavity and the steel ball groove; when the tension nut is unlocked, the limiting steel ball is locked between the steel ball groove and the annular groove.

9. A quick-release tensioner suitable for deep-sea operations according to claim 5, characterized in that, The driven locking part includes a second slide rod, and a second limiting member is provided outside the second slide rod. One end of the second limiting member always abuts against the second split tension nut. A third compression spring is connected between the second limiting member and the first driven mating cavity. One end of the second slide rod is limited by the first driven mating cavity. With the tension nut in the unlocked state, the other end of the second slide rod is limited by the second driven engagement cavity.

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