Pressure self-adaptive sealing device

Abstract

The utility model relates to the technical field of sealing rings, and discloses a pressure self-adaption sealing device which comprises a pipeline, a connecting pipe is fixedly installed in the pipeline, one end of the connecting pipe completely penetrates through the interior of the pipeline, a piston is movably installed in the pipeline, a limiting groove is formed in the piston, and a sealing ring is arranged in the limiting groove. A sealing ring is fixedly mounted in the limiting groove; and a cavity is formed in the pipeline. Compared with a traditional device, efficient pressure relief and reliable sealing of a pipeline are achieved through precise matching of the spring, the sealing ring and the piston, the elasticity of the spring ensures that when the internal pressure of the pipeline exceeds a set value, the piston can rapidly move to open a pressure relief channel, pressure safety is guaranteed, and meanwhile the pressure relief device is convenient to use. The wear-resistant and corrosion-resistant sealing ring ensures that the piston is tightly attached to the wall of the pipeline, and leakage of fluid or gas is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing rings, and more specifically, to a pressure self-adapting sealing device. Background Art

[0002] A pressure adaptive sealing device is a sealing device that can automatically adapt to different pressure conditions. This device usually includes a static ring assembly fixed to the static part of the seal and a dynamic ring assembly that can rotate with the shaft. On the outer diameter side of the end face of the static ring of the seal, there are circumferentially uniformly distributed discontinuous cavities, and a through hole is opened on the lower surface of each cavity, and the through hole is connected to the low-pressure area. These discontinuous cavities are sealed by sealing rings, and different structural forms can be adopted according to different sealing conditions to achieve the best sealing effect. In the prior art, the sealing ring is usually fixed inside the pipeline. This method does provide a higher sealing efficiency. However, when the pressure inside the pipeline increases abnormally, this fixed sealing ring cannot provide an effective pressure relief path, resulting in rapid accumulation of pressure inside the pipeline until it exceeds the bearing limit of the pipeline, and eventually causes the pipeline to rupture. This design has safety hazards in application scenarios with high pressure or large pressure fluctuations. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a pressure-adaptive sealing device, which has the advantage of being convenient for relieving pressure inside a pipeline.

[0004] To achieve the above object, the utility model provides the following technical solutions: a pressure adaptive sealing device, comprising a pipeline, a connecting pipe is fixedly installed inside the pipeline, and one end of the connecting pipe completely penetrates the inside of the pipeline, a piston is movably installed inside the pipeline, a limiting groove is provided inside the piston, and a sealing ring is fixedly installed inside the limiting groove;

[0005] A cavity is opened inside the pipe, a support plate is fixedly installed on the outer surface of the cavity, a connecting rod is fixedly installed on the outer side of the piston, and one end of the connecting rod completely penetrates the support plate, a limit block is fixedly installed on one end of the support plate, and a spring is fixedly installed between the piston and the support plate.

[0006] As a preferred technical solution of the utility model, the outer diameter of the sealing ring is smaller than the inner diameter of the connecting rod.

[0007] As a preferred technical solution of the utility model, the connecting rods and the limit blocks are arranged in groups of two, and there are two groups in total inside the support plate.

[0008] As a preferred technical solution of the utility model, the sealing ring is made of hydrogenated nitrile rubber, and two sealing rings are arranged inside the piston.

[0009] As a preferred technical solution of the utility model, the support plates and the limit blocks are arranged in groups of two, and there are two groups on the inner wall of the cavity.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] Compared with the traditional device, the utility model realizes efficient pressure relief and reliable sealing of the pipeline through the precise cooperation of the spring, the sealing ring and the piston. The elasticity of the spring ensures that when the internal pressure of the pipeline exceeds the set value, the piston can quickly move to open the pressure relief channel to ensure pressure safety. At the same time, the wear-resistant and corrosion-resistant sealing ring ensures the close fit between the piston and the pipeline wall, effectively preventing the leakage of fluid or gas. The design not only reduces mechanical wear and friction, extends the service life of the equipment, but also reduces the maintenance cost caused by leakage. More importantly, it has strong adaptability and can cope with working environments with different pressures, temperatures and media, providing stable and reliable protection for the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the front three-dimensional appearance structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0014] Figure 3 For this utility model Figure 2 A is an enlarged structural diagram;

[0015] Figure 4 This is a schematic diagram of the piston structure of the utility model;

[0016] Figure 5 This is a schematic diagram of the rubber ring structure of the utility model.

[0017] In the figure: 1. pipeline; 2. connecting pipe; 3. cavity; 4. support plate; 5. sealing ring; 6. piston; 7. spring; 8. connecting rod; 9. limit block; 10. limit groove. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figures 1 to 5As shown, the utility model provides a pressure adaptive sealing device, comprising a pipeline 1, a connecting pipe 2 is fixedly installed inside the pipeline 1, and one end of the connecting pipe 2 completely penetrates the inside of the pipeline 1, a piston 6 is movably installed inside the pipeline 1, a limiting groove 10 is provided inside the piston 6, and a sealing ring 5 is fixedly installed inside the limiting groove 10;

[0020] A cavity 3 is opened inside the pipe 1, and a support plate 4 is fixedly installed on the outer surface of the cavity 3. A connecting rod 8 is fixedly installed on the outer side of the piston 6, and one end of the connecting rod 8 completely penetrates the support plate 4. A limit block 9 is fixedly installed at one end of the support plate 4, and a spring 7 is fixedly installed between the piston 6 and the support plate 4.

[0021] The staff pressurizes the inside of the pipeline 1 through the connecting pipe 2. When the pressure inside the pipeline 1 is too high, the inside of the pipeline 1 needs to be depressurized. The piston 6 inside the pipeline 1 is squeezed by air pressure, and the sealing ring 5 is squeezed by the piston 6. The sealing ring 5 and the piston 6 squeeze the connecting rod 8 and the spring 7, so that the connecting rod 8 moves left and right inside the support plate 4. When the pressure of the pipeline 1 is too low, the sealing ring 5 and the piston 6 are squeezed by the spring 7, the connecting rod 8 inside the support plate 4 is limited by the limit block 9, and the inside of the pipeline 1 is sealed by the sealing ring 5, thereby achieving the benefits of depressurization and sealing of the pipeline 1.

[0022] The inside of the pipeline 1 is pressurized through the connecting pipe 2. When the pressure inside the pipeline 1 is too high, the inside of the pipeline 1 needs to be depressurized. The piston 6 inside the pipeline 1 is squeezed by air pressure, and the sealing ring 5 is squeezed by the piston 6. The sealing ring 5 and the piston 6 squeeze the connecting rod 8 and the spring 7, so that the connecting rod 8 moves left and right inside the support plate 4. When the pressure of the pipeline 1 is too low, the sealing ring 5 and the piston 6 are pressed by the spring 7. The inside of the pipeline 1 is sealed by the sealing ring 5. Compared with the traditional device, the device is precise through the spring 7, the sealing ring 5 and the piston 6. The close fit achieves efficient pressure relief and reliable sealing for the pipeline 1. The elasticity of the spring 7 ensures that when the internal pressure of the pipeline exceeds the set value, the piston can quickly move to open the pressure relief channel to ensure pressure safety. At the same time, the wear-resistant and corrosion-resistant sealing ring 5 ensures a close fit between the piston 6 and the wall of the pipeline 1, effectively preventing the leakage of fluid or gas. The design not only reduces mechanical wear and friction, extends the service life of the equipment, but also reduces the maintenance cost caused by leakage. More importantly, it has strong adaptability and can cope with working environments with different pressures, temperatures and media, providing stable and reliable protection for the pipeline 1.

[0023] The outer diameter of the sealing ring 5 is smaller than the inner diameter of the connecting rod 8 .

[0024] Since the outer diameter of the sealing ring 5 is smaller than the inner diameter of the connecting rod 8, when the sealing ring 5 and the piston 6 move inside the cavity 3, the gas slowly flows out through the outer diameter of the sealing ring 5. In this way, in the process of relieving the pressure inside the pipeline 1, it is easy to quickly flow out the gas and reduce the pressure inside the pipeline 1.

[0025] The connecting rods 8 and the limiting blocks 9 are arranged in pairs, and there are two groups in total inside the supporting plate 4 .

[0026] Since the connecting rods 8 and the limit blocks 9 are grouped in pairs, and there are two groups in total inside the support plate 4, it is convenient to squeeze the sealing ring 5 and the piston 6 through air pressure when the sealing ring 5 is subjected to high pressure, and then the connecting rod 8 and the limit block 9 are squeezed by the sealing ring 5 and the piston 6. Through the movement of the sealing ring 5 and the piston 6, it is convenient to relieve the pressure inside the pipeline 1, and the cooperation between the connecting rod 8 and the limit block 9 improves the internal pressure relief efficiency of the pipeline 1.

[0027] The sealing ring 5 is made of hydrogenated nitrile rubber, and two sealing rings 5 ​​are arranged inside the piston 6 .

[0028] Since the sealing ring 5 is made of hydrogenated nitrile rubber, and two are arranged inside the piston 6 of the sealing ring 5, and the hydrogenated nitrile rubber sealing ring 5 has high resistance to permanent deformation due to compression, it can quickly return to its original state after compression, effectively avoiding the risk of sealing failure. At the same time, its high strength and high tearing performance give the sealing ring excellent stability in various complex working environments, ensuring a long-term and reliable sealing effect. In addition, the hydrogenated nitrile rubber sealing ring 5 also exhibits excellent wear resistance, and can maintain excellent sealing performance for a long time even in a friction and wear environment, providing stable and reliable protection for various types of equipment.

[0029] The support plates 4 and the limit blocks 9 are arranged in pairs, and there are two groups on the inner wall of the cavity 3 .

[0030] Since the support plates 4 and the limit blocks 9 are grouped in pairs, there are two groups in total inside the cavity 3. Through the cooperation between the support plates 4 and the limit blocks 9, it is convenient to support and limit the connecting rod 8 and the spring 7, thereby ensuring the stability of the sealing ring 5 and the piston 6 during the left and right movement, and improving the use efficiency of the sealing ring 5 and the piston 6.

[0031] The working principle and use process of this utility model:

[0032] The staff pressurizes the inside of the pipeline 1 through the connecting pipe 2. When the pressure inside the pipeline 1 is too high, the inside of the pipeline 1 needs to be depressurized. The piston 6 inside the pipeline 1 is squeezed by air pressure, and the sealing ring 5 is squeezed by the piston 6. The sealing ring 5 and the piston 6 squeeze the connecting rod 8 and the spring 7, so that the connecting rod 8 moves left and right inside the support plate 4. When the pressure of the pipeline 1 is too low, the sealing ring 5 and the piston 6 are squeezed by the spring 7, the connecting rod 8 inside the support plate 4 is limited by the limit block 9, and the inside of the pipeline 1 is sealed by the sealing ring 5, thereby achieving the benefits of depressurization and sealing of the pipeline 1.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although the 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. A pressure adaptive sealing device, comprising a pipeline (1), characterized in that: A connecting pipe (2) is fixedly installed inside the pipeline (1), and one end of the connecting pipe (2) completely penetrates the inside of the pipeline (1). A piston (6) is movably installed inside the pipeline (1). A limiting groove (10) is provided inside the piston (6), and a sealing ring (5) is fixedly installed inside the limiting groove (10); A cavity (3) is provided inside the pipe (1), a support plate (4) is fixedly installed on the outer surface of the cavity (3), a connecting rod (8) is fixedly installed on the outer side of the piston (6), and one end of the connecting rod (8) completely passes through the support plate (4), a limit block (9) is fixedly installed on one end of the support plate (4), and a spring (7) is fixedly installed between the piston (6) and the support plate (4).

2. A pressure adaptive sealing device according to claim 1, characterized in that: The outer diameter of the sealing ring (5) is smaller than the inner diameter of the connecting rod (8).

3. A pressure adaptive sealing device according to claim 1, characterized in that: The connecting rods (8) and the limiting blocks (9) are arranged in pairs, with two groups in total being located inside the supporting plate (4).

4. A pressure adaptive sealing device according to claim 1, characterized in that: The sealing ring (5) is made of hydrogenated nitrile rubber, and two sealing rings (5) are arranged inside the piston (6).

5. A pressure adaptive sealing device according to claim 1, characterized in that: The support plates (4) and the limit blocks (9) are arranged in pairs, with two groups in total on the inner wall of the cavity (3).

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