Oil and gas pipeline seal with built-in buffer layer

Abstract

The invention discloses an oil and gas pipeline seal with a built-in buffer layer, comprising an assembly and a sealing ring. A hydraulic pipe and a lubricating liquid pipe are arranged on the outer ring surface of the mounting ring of the assembly. The hydraulic pipe pushes a piston through an electric push rod, and the internal liquid of the hydraulic pipe communicates with two annular hydraulic fluid circuits. The pulling piston in the lubricating liquid pipe is connected with a clamping ring. The two side plates of the clamping ring are provided with a lubricating liquid circuit and a clamping liquid pipe. The clamping piston in the clamping liquid pipe is fixed to the clamping plate. During installation, the electric push rod is started to push the piston in the hydraulic pipe, transmit the liquid pressure, push the pulling piston and the clamping piston to move, automatically clamp and fix the sealing ring, and stretch and expand the sealing ring within a safe range, so that it is convenient to be mounted on the connecting end of the oil and gas pipeline, reducing the difficulty of mounting. After the installation is completed, the relevant parts are reset and the clamping of the sealing ring is automatically released. In addition, the lubricating liquid enters each liquid circuit through the central hole of the pulling piston, and finally accumulates on the surface of the sealing ring, playing a lubricating role when the sealing ring is embedded and installed.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas pipeline sealing, in particular to an oil and gas pipeline sealing component with a built-in buffer layer. Background Art

[0002] In today's global energy landscape, oil and natural gas, as important energy resources, play an indispensable role in many fields such as industrial production, daily life and transportation. With the continuous development of the global economy, the demand for oil and gas resources is increasing day by day, and the efficient and safe transportation of oil and gas has become a key issue in the energy field. Pipeline transportation has become the main mode of oil and gas transportation with its significant advantages such as large transportation volume, low cost and strong continuity. Whether it is a long-distance pipeline across mountains and rivers or a pipeline in a station connecting factory equipment, a huge and complex oil and gas transportation network has been built. However, oil and gas have the characteristics of flammability, explosiveness, volatility and corrosiveness, which puts extremely high demands on the sealing of the pipeline system. As the core component to ensure the sealing of the pipeline system, the performance of oil and gas pipeline seals is directly related to the safety and stability of the entire oil and gas transportation system. Once there is a problem with the seal, oil and gas leakage will not only cause energy waste, but also may cause serious safety accidents such as fire and explosion, which will have a huge negative impact on the safety of personnel, the surrounding environment and economic development. Therefore, in the context of oil and gas pipeline transportation, oil and gas pipeline seals are always in an extremely critical position.

[0003] At present, when commonly used oil and gas pipeline seals are installed at the connection position of the pipeline, it is generally difficult to quickly install them in the designated slot position. They need to be assembled manually with special or matching components. The installation process is too troublesome, and if too much force is used, there will be gaps that cause scratches or premature wear on the sealing ring, which will affect the actual sealing quality and service life of the sealing ring.

[0004] To this end, an oil and gas pipeline seal with a built-in buffer layer is proposed. Summary of the invention

[0005] The object of the present invention is to provide an oil and gas pipeline seal with a built-in buffer layer to solve the problem of the troublesome assembly of the oil and gas pipeline seal mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an oil and gas pipeline seal with a built-in buffer layer, comprising:

[0007] The assembly is a ring body with an inner diameter larger than the outer diameter of the connecting end of the oil and gas pipeline, and can be freely slidably sleeved on the connecting end of the oil and gas pipeline;

[0008] The sealing ring is arranged at the center of the assembly ring and is arranged parallel to the assembly;

[0009] In which, the assembly includes a mounting ring, the outer ring surface of the mounting ring is integrally provided with a hydraulic pipe and three lubricating fluid pipes, an electric push rod is fixedly provided at the upper port of the hydraulic pipe body, and the output rod of the electric push rod is inserted into the interior of the hydraulic pipe and fixed to a piston which is slidingly sealed and arranged inside the hydraulic pipe, two annular hydraulic fluid circuits are provided inside the mounting ring, and the interior of the hydraulic pipe is interconnected with the two hydraulic fluid circuits, a pulling piston is slidingly sealed inside the lubricating fluid pipe, and one end of the pulling piston extends toward the center of the circle and is inserted into the inner ring surface of the mounting ring and is fixed to the clamping ring, several clamping fluid pipes are inserted and fixed inside the two side plates of the clamping ring, and lubricating fluid circuits are provided inside the two side plates of the clamping ring along the path, a clamping piston is slidingly sealed inside the clamping fluid pipe, and one end of the clamping piston passes through the clamping fluid pipe and is fixed to a clamping plate which is slidingly arranged inside the U-shaped groove of the clamping ring.

[0010] Preferably, the three lubricating liquid pipes are distributed in a circular array along the axis of the mounting ring, and the hydraulic pipe is integrally arranged above the side surface of the mounting ring and is located in the middle of the two lubricating liquid pipes.

[0011] Preferably, the interior of the hydraulic pipe is T-shaped and stores safety liquid inside.

[0012] Preferably, the two pipe racks of the hydraulic fluid circuits are provided with branch holes connected to the inner ends of the lubricating fluid pipes when passing through the positions of the lubricating fluid pipes. The ends of the lubricating fluid pipes are equipped with refilling bottles for refilling the pipes, and the surfaces of the refilling bottles are provided with interfaces for refilling.

[0013] Preferably, the clamping ring has a U-shaped cross-section, and according to the annular array distribution of the lubricating liquid tubes, branch holes for communication are provided in the channels opened on the diameter of the lubricating liquid circuit toward the clamping liquid tube and the axial center position of the pulling piston.

[0014] Preferably, a through hole is opened inside the clamping piston along the axis, and a one-way valve is arranged inside the through hole. The clamping plate is an annular plate with the same arc as the clamping ring and is arranged on the front and rear sides of the U-shaped groove of the clamping ring.

[0015] Preferably, the facing surfaces of the two clamping plates are provided with openings corresponding to the clamping pistons for communicating with the clamping pistons, and the ends of the holes are configured to be expanded. Initially, the sealing ring is placed between the clamping plates for clamping and fixing.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention sets up an assembly body. When installing, the electric push rod is started, which pushes the piston in the hydraulic pipe to transmit the liquid pressure, pushes the pulling piston and the clamping piston to move, and realizes automatic clamping and fixing of the sealing ring. After the installation is completed, the relevant parts are reset again to automatically release the clamping of the sealing ring. Compared with the traditional manual assembly, there is no need for manual operation with relevant tools, which greatly reduces the difficulty of operation and improves the installation efficiency. At the same time, during the movement of the pulling piston, the sealing ring will be stretched and expanded within a safe range. This expansion characteristic increases the inner diameter of the sealing ring to a certain extent, making it easier to install on the connecting end of the oil and gas pipeline, reducing the installation difficulty caused by the mismatch between the size of the sealing ring and the connecting end of the pipeline. Even if there is a certain tolerance at the connecting end of the pipeline, the installation operation can be completed relatively smoothly.

[0018] 2. In the present invention, through the setting of the assembly body, the lubricating liquid enters the lubricating liquid circuit through the central hole of the pulling piston, then flows into the clamping liquid pipe, partially enters the clamping piston, and finally accumulates on the surface of the sealing ring. These lubricating liquids play a good lubricating role when the sealing ring is installed, effectively reducing the friction between the sealing ring and the oil and gas pipeline groove, so that the sealing ring can be more smoothly embedded in the groove, avoiding the wear and jam of the sealing ring due to excessive friction, and improving the installation efficiency and quality. At the same time, the coordinated work between the hydraulic pipe, the lubricating liquid pipe, and each piston and the liquid circuit is used to ensure the position accuracy of the sealing ring during installation, without the need for manual repeated adjustment of the position of the sealing ring, reducing the installation time, and improving the accuracy and stability of the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall structural view of the present invention;

[0020] Figure 2 It is an overall cross-sectional view of the present invention;

[0021] Figure 3 It is an overall disassembly diagram of the present invention;

[0022] Figure 4 It is a cross-sectional view of the mounting ring and its connection structure of the present invention;

[0023] Figure 5 is a cross-sectional view of the clamping ring of the present invention;

[0024] Figure 6 It is a schematic diagram of the installation ring of the present invention;

[0025] Figure 7 It is a schematic diagram of the clamping ring of the present invention;

[0026] Figure 8 It is a schematic diagram of the clamping plate of the present invention.

[0027] In the figure:

[0028] 1. Assembly; 11. Mounting ring; 111. Hydraulic pipe; 1111. Electric push rod; 1112. Hydraulic fluid circuit; 112. Lubricating fluid pipe; 1121. Fluid replenishing bottle; 12. Clamping ring; 121. Pulling piston; 122. Lubricating fluid circuit; 123. Clamping fluid pipe; 124. Clamping plate; 125. Clamping piston;

[0029] 2. Sealing ring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 8 The present invention provides a technical solution for an oil and gas pipeline seal with a built-in buffer layer:

[0032] An oil and gas pipeline seal with a built-in buffer layer, comprising:

[0033] The assembly 1 is a ring body with an inner diameter larger than the outer diameter of the oil and gas pipeline connection end, and can be freely slidably sleeved on the oil and gas pipeline connection end;

[0034] The sealing ring 2 is arranged at the center of the ring of the assembly 1 and is arranged parallel to the assembly 1;

[0035] The assembly 1 includes a mounting ring 11, a ring groove of a specified depth is provided at the center of the inner ring surface of the mounting ring 11, and a hydraulic pipe 111 and three lubricating liquid pipes 112 are integrally provided on the outer ring surface of the mounting ring 11, wherein the three lubricating liquid pipes 112 are distributed in a circular array along the axis of the mounting ring 11, the hydraulic pipe 111 is integrally provided above the side surface of the mounting ring 11, and is located in the middle of the two lubricating liquid pipes 112, the interior of the hydraulic pipe 111 is T-shaped, and a safety liquid is stored inside, an electric push rod 1111 is fixedly provided at the upper end of the hydraulic pipe 111 body, and the output rod of the electric push rod 1111 is inserted into the interior of the hydraulic pipe 111 and is in close contact with the sliding seal. The piston sealed inside the hydraulic pipe 111 is fixed, and two annular hydraulic fluid paths 1112 are symmetrically opened along the diameter at the front and rear positions away from the proximal side of the hydraulic pipe 111 inside the mounting ring 11, and the interior of the hydraulic pipe 111 is interconnected with the two hydraulic fluid paths 1112, and the pipe racks of the two hydraulic fluid paths 1112 are provided with branch holes connected to the inner end of the lubricating fluid pipe 112 when passing through the position of the lubricating fluid pipe 112, and the end of the lubricating fluid pipe 112 is equipped with a fluid replenishing bottle 1121 for replenishing the fluid in the pipe, and the surface of the fluid replenishing bottle 1121 has a one-way output interface for replenishing the fluid, and the lubricating fluid pipe 112 is provided with a pulling piston 121 in a sliding and sealing manner, and the pulling piston 121 One end thereof extends toward the center of the circle and is inserted into the annular groove formed on the inner surface of the mounting ring 11, and is fixed to the clamping ring 12 slidably disposed in the annular groove. The cross section of the clamping ring 12 is U-shaped, and according to the annular array distribution of the lubricating liquid tube 112, the clamping ring 12 is provided with a plurality of mounting holes along the axial annular array inside the two side plates, and a clamping liquid tube 123 is inserted and fixed inside the mounting hole. An arc-shaped lubricating liquid path 122 is formed inside the two side plates of the clamping ring 12 at one end of the clamping liquid tube 123 away from the U-shaped groove of the clamping ring 12, and branch holes for communication are formed in the channel formed on the diameter of the lubricating liquid path 122 toward the clamping liquid tube 123 and the axial center position of the pulling piston 121. The internal sliding seal of the clamping liquid tube 123 is provided with a clamping piston 125, and one end of the clamping piston 125 passes through the clamping liquid tube 123 and is fixed to a clamping plate 124 slidably arranged inside the U-shaped groove of the clamping ring 12. A through hole is opened inside the clamping piston 125 along the axis, and a one-way valve is arranged inside the through hole. The clamping plate 124 is an annular plate with the same arc as the clamping ring 12, and is arranged on the front and rear sides of the U-shaped groove of the clamping ring 12. The facing surfaces of the two clamping plates 124 correspond to the clamping piston 125 and are provided with an opening for connecting and opening the clamping piston 125, and the hole end is set to be expanded. Initially, the sealing ring 2 is taken and placed between the clamping plates 124 for clamping and fixing.

[0036] During operation, the sealing ring 2 is first placed between the clamping plates 124. During installation, the electric push rod 1111 is started, and its output rod pushes the piston in the hydraulic tube 111 to compress the safety liquid in the tube. The liquid flows into the two annular hydraulic fluid paths 1112 through the channel, pushing the pulling piston 121 in the lubricating fluid tube 112 to slide away from the center of the installation ring 11. The pulling piston 121 slides and squeezes the lubricating liquid in the lubricating fluid tube 112. The lubricating liquid enters the lubricating fluid path 122 through the central hole of the pulling piston 121, and then flows into the clamping fluid tube 123, pushing the clamping piston 125 to move toward each other, clamping and fixing the sealing ring 2. The pulling piston 121 continues to move, so that the sealing ring 2 is stretched and expanded within a safe range, and more lubricating fluid enters the clamping liquid pipe 123, and part of it enters the clamping piston 125 through the one-way valve, and finally stays on the surface of the sealing ring 2. At this time, the assembly 1 is put on the card slot position of the sealing ring 2 at the oil and gas pipeline connecting end, and the hydraulic pipe 111 is started to reset the piston, and the safety liquid refluxes. The pulling and clamping of the sealing ring 2 are also reset, and the sealing ring 2 is released. The sealing ring 2 shrinks and is clamped in the oil and gas pipeline card slot, and the accumulated lubricating fluid helps it to fit smoothly.

[0037] In summary, through the setting of the assembly body 1, when installing, the electric push rod 1111 is started, which pushes the piston in the hydraulic pipe 111 to transmit the liquid pressure, push the pulling piston 121 and the clamping piston 125 to move, and realize the automatic clamping and fixing of the sealing ring 2. After the installation is completed, the relevant parts are reset again to automatically release the clamping of the sealing ring 2. Compared with the traditional manual assembly, there is no need for manual operation with relevant tools, which greatly reduces the difficulty of operation and improves the installation efficiency. At the same time, during the movement of the pulling piston 121, the sealing ring 2 will be stretched and expanded within a safe range. This expansion characteristic increases the inner diameter of the sealing ring 2 to a certain extent, making it easier to install on the oil and gas pipeline connection end, reducing the installation difficulty caused by the mismatch between the size of the sealing ring 2 and the pipeline connection end. Even if there is a certain tolerance at the pipeline connection end, the installation operation can be completed relatively smoothly.

[0038] Through the arrangement of the assembly 1, the lubricating liquid enters the lubricating liquid circuit 122 through the central hole of the pulling piston 121, then flows into the clamping liquid pipe 123, partially enters the clamping piston 125, and finally accumulates on the surface of the sealing ring 2. These lubricating liquids play a good lubricating role when the sealing ring 2 is installed, effectively reducing the friction between the sealing ring 2 and the oil and gas pipeline groove, so that the sealing ring 2 can be more smoothly embedded in the groove, avoiding the wear and jam of the sealing ring 2 due to excessive friction, and improving the installation efficiency and quality. At the same time, the coordinated work of the hydraulic pipe 111, the lubricating liquid pipe 112 and the various pistons and liquid circuits is used to ensure the position accuracy of the sealing ring 2 during installation, without the need for manual repeated adjustment of the position of the sealing ring 2, reducing the installation time, and improving the accuracy and stability of the installation.

[0039] Working principle: When working, the sealing ring 2 is placed between the clamping plates 124 in advance. When the sealing ring 2 needs to be installed, the electric push rod 1111 is started, and the output rod of the electric push rod 1111 pushes the piston in the hydraulic pipe 111. Since the hydraulic pipe 111 stores safety liquid inside, the movement of the piston will compress the liquid in the hydraulic pipe 111, and then the liquid in the hydraulic pipe 111 will flow through the channel interconnected with the two annular hydraulic fluid circuits 1112, and flow to the hydraulic fluid circuit 1112, and act on the surface of the pulling piston 121 along the hydraulic fluid circuit 1112, pushing the pulling piston 121 in the lubricating fluid pipe 112 to The piston 121 slides in the direction away from the center of the mounting ring 11, and as the pulling piston 121 moves centrifugally, the lubricating liquid in the lubricating liquid tube 112 is squeezed at the same time, and then the lubricating liquid enters the lubricating liquid path 122 along the hole in the center of the pulling piston 121, and enters the clamping liquid tube 123 along the lubricating liquid path 122, pushing the clamping piston 125 movably arranged inside the clamping liquid tube 123, so that the clamping piston 125 moves toward each other along the wall of the clamping liquid tube 123, and clamps and fixes the sealing ring 2 between the clamping plates 124. After the sealing ring 2 is fixed, as the pulling piston 121 moves along The lubricating fluid pipe 112 continues to move centrifugally, and the clamped sealing ring 2 will be stretched in multiple directions within a safe range, so that the sealing ring 2 will expand to a certain extent within a safe range. At the same time, more lubricating fluid will be pressed into the interior of the clamping fluid pipe 123 through the lubricating fluid path 122. Then, the lubricating fluid entering the clamping fluid pipe 123 will reach the opening condition of the one-way valve and enter the interior of the clamping piston 125. Finally, the clamping plate 124 temporarily accumulates and stays on the surface of the sealing ring 2. Then, the assembly 1 can be freely slidably sleeved on the card slot position of the sealing ring 2 at the connecting end of the oil and gas pipeline, and then the hydraulic pipe 111 is started to pull the activity. The plug moves and resets, and then the safety liquid will flow back to the inside of the hydraulic pipe 111 under the traction of the piston, and at the same time, the pulling piston 121, the clamping ring 12, the clamping plate 124 and the clamping piston 125 will also be reset to the initial position. After the clamping plate 124 and the clamping piston 125 are reset, the pulling and clamping state of the sealing ring 2 will be released, and then the sealing ring 2 will shrink along the surface of the clamping plate 124 and be sleeved and connected to the card slot position of the oil and gas pipeline. During this process, the lubricating fluid accumulated between the sealing ring 2 and the clamping plate 124 will be smeared on the surface of the sealing ring 2, helping the sealing ring 2 to complete the smooth engagement at the card slot.

[0040] It should be noted that, according to the resetting condition of the pulling piston 121 , a resetting spring may be provided to assist the resetting of the pulling piston 121 .

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil and gas pipeline seal with a built-in buffer layer, characterized in that: include: The assembly (1) is a ring body having an inner diameter larger than the outer diameter of the oil and gas pipeline connection end, and can be freely slidably sleeved on the oil and gas pipeline connection end; The sealing ring (2) is arranged at the center of the ring of the assembly (1) and is arranged parallel to the assembly (1); The assembly (1) comprises a mounting ring (11), the outer ring surface of the mounting ring (11) being integrally provided with a hydraulic pipe (111) and three lubricating fluid pipes (112), an electric push rod (1111) being fixedly provided at the upper end of the hydraulic pipe (111) body, and an output rod of the electric push rod (1111) being inserted into the interior of the hydraulic pipe (111) and being fixed to a piston provided in the hydraulic pipe (111) by a sliding seal, two annular hydraulic fluid paths (1112) being provided in the interior of the mounting ring (11), and the interior of the hydraulic pipe (111) being interconnected with the two hydraulic fluid paths (1112), and the lubricating fluid pipe (112) being fixedly provided with a piston having a sliding seal provided in the interior of the hydraulic pipe (111). ) are provided with a pulling piston (121) in a sliding seal inside the tube, and one end of the pulling piston (121) extends toward the center of the circle and penetrates into the inner ring surface of the mounting ring (11) and is fixed to the clamping ring (12), and the clamping ring (12) has a plurality of clamping liquid tubes (123) inserted and fixed inside the two side plates, and the two side plates of the clamping ring (12) are provided with lubricating liquid paths (122) along the path inside, and the internal sliding seal of the clamping liquid tube (123) is provided with a clamping piston (125), and one end of the clamping piston (125) passes through the clamping liquid tube (123) and is fixed to a clamping plate (124) slidably arranged inside the U-shaped groove of the clamping ring (12).

2. The oil and gas pipeline seal with a built-in buffer layer according to claim 1, characterized in that: The three lubricating liquid pipes (112) are distributed in a circular array along the axis of the mounting ring (11), and the hydraulic pipe (111) is integrally arranged above the side surface of the mounting ring (11) and is located in the middle of the two lubricating liquid pipes (112).

3. The oil and gas pipeline seal with a built-in buffer layer according to claim 1, characterized in that: The interior of the hydraulic pipe (111) is T-shaped and contains safety liquid.

4. The oil and gas pipeline seal with a built-in buffer layer according to claim 1, characterized in that: The pipe racks of the two hydraulic fluid circuits (1112) are provided with branch holes connected to the inner end of the lubricating fluid pipe (112) when passing through the lubricating fluid pipe (112); the end of the lubricating fluid pipe (112) is equipped with a fluid replenishing bottle (1121) for replenishing fluid in the pipe, and the surface of the fluid replenishing bottle (1121) is provided with an interface for replenishing fluid.

5. The oil and gas pipeline seal with a built-in buffer layer according to claim 1, characterized in that: The clamping ring (12) has a U-shaped cross section and is distributed in a circular array according to the lubricating liquid pipes (112).

6. The oil and gas pipeline seal with a built-in buffer layer according to claim 1, characterized in that: Branch holes for communication are provided in the channels opened on the diameter of the lubricating liquid path (122) toward the clamping liquid tube (123) and the axial center position of the pulling piston (121).

7. The oil and gas pipeline seal with a built-in buffer layer according to claim 1, characterized in that: The interior of the clamping piston (125) is provided with a through hole along the axis, and a one-way valve is arranged inside the through hole. The clamping plate (124) is a ring plate with the same arc as the clamping ring (12) and is arranged on the front and rear sides of the U-shaped groove of the clamping ring (12).

8. The oil and gas pipeline seal with a built-in buffer layer according to claim 1, characterized in that: The facing surfaces of the two clamping plates (124) correspond to the clamping piston (125) and are provided with openings for communicating with the clamping piston (125), and the ends of the openings are arranged to be expanded.

9. The oil and gas pipeline seal with a built-in buffer layer according to claim 1, characterized in that: Initially, the sealing ring (2) is placed between the clamping plates (124) for clamping and fixing.

Images