A full-bore pipeline quick burst valve

Abstract

The utility model relates to the technical field of explosion -proof valve discloses full bore pipeline fast explosion -proof valve, including the shutter type explosion -proof valve, the left and right sides of shutter type explosion -proof valve are fixed with a flange plate respectively, and the flange plate is used for connecting with the outside pipeline, and the outer ring of every flange plate is fixed with a buffer mechanism, and the inside fixed temperature regulation mechanism has the compensation type sealing structure in shutter type explosion -proof valve inside the inboard temperature regulation mechanism installs. The utility model through the damping liquid of buffer mechanism can absorb the outside pipeline impact kinetic energy, reduces the influence to sealing structure and explosion -proof valve, through the paraffin base deformation material of temperature regulation mechanism can pass through the stable temperature of phase change heat absorption, protects the sealing ring, in compensation type sealing structure, the butterfly spring can guarantee initial sealing property, supplementary buffer impact, still can lift the sealing ring and maintain sealing when the sealing ring is ageing, improves the security and life of device.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof valve technology, and in particular to a fast explosion-proof valve for full-bore pipelines. Background Technology

[0002] Full-bore pipeline fast explosion arrestor valves are core safety protection devices in pipelines transporting flammable and explosive media (such as gas, dust, and chemical gases). Their core function is to quickly block the propagation of the explosion when an explosion occurs in the pipeline, while ensuring low-resistance passage of the medium under normal transport conditions. They are widely used in high-risk fields such as chemical, mining, and energy industries.

[0003] However, existing full-bore pipeline fast explosion-proof valves still have several shortcomings in practical applications, making it difficult to meet the requirements of efficient protection and long-term stable operation: First, the impact buffering capacity of the flange connection is weak. When the external pipeline is impacted by medium pressure fluctuations, equipment vibration, or explosion shock waves, there is a lack of effective energy-absorbing buffer structure. The impact can easily act directly on the sealing components and the explosion-proof valve body, leading to seal failure or deformation of internal components of the explosion-proof valve, affecting the reliability of explosion-proofing. Second, the temperature adaptability is insufficient. When the pipeline is transporting high-temperature media or when an explosion generates short-term high temperatures, the existing structure cannot regulate the temperature of key sealing components (such as sealing rings). High temperatures can easily lead to accelerated aging and elasticity decay of the sealing rings, thereby causing the risk of seal leakage. Third, the sealing structure lacks long-term compensation capability. After long-term use, the sealing rings are prone to wear and aging, resulting in fitting gaps. The existing sealing design cannot actively compensate for these gaps, requiring frequent shutdowns to replace the sealing rings to maintain sealing performance, increasing maintenance costs and pipeline downtime risks. Therefore, in light of the above situation, there is an urgent need to develop a fast explosion-proof valve for full-bore pipelines that can absorb the impact kinetic energy of external pipelines through a damping fluid with a buffer mechanism, reducing the impact on the sealing structure and explosion-proof valve; a paraffin-based deformation material with a temperature regulation mechanism that can stabilize the temperature through phase change heat absorption, protecting the sealing ring; and a compensating sealing structure in which a disc spring can ensure initial sealing performance, assist in buffering impacts, and also lift the sealing ring to maintain sealing when it ages. The overall structure takes into account impact buffering, temperature regulation, and sealing protection during the explosion-proof process, improving the safety and service life of the device. This would overcome the shortcomings in current practical applications and meet current needs. Utility Model Content

[0004] The purpose of this invention is to provide a fast explosion-proof valve for full-bore pipelines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A full-bore pipeline fast explosion-proof valve includes a gate-type explosion-proof valve, a flange, a buffer mechanism, a temperature regulating mechanism, and a compensating sealing structure. A flange is fixed to each of the left and right sides of the gate-type explosion-proof valve. The flanges are used to connect to external pipelines. A buffer mechanism is fixed to the outer ring of each flange. A temperature regulating mechanism is fixed inside the flange. A compensating sealing structure is installed inside the gate-type explosion-proof valve on the inner side of the temperature regulating mechanism. The temperature regulating mechanism includes a second annular shell and a paraffin-based deformable material. The second annular shell is fixed inside the flange and is made of stainless steel. The second annular shell is filled with paraffin-based deformable material. The compensating sealing structure includes a butterfly spring, a rigid support ring, and a sealing ring. Multiple butterfly springs are fixedly installed inside the flange. The butterfly springs are fixedly connected to the rigid support ring, and a sealing ring is fixed to the front side of the rigid support ring.

[0006] Preferably, the buffer mechanism includes a first annular housing and a damping fluid, wherein the first annular housing is fixed to the outside of the flange and is filled with damping fluid.

[0007] Preferably, the front side of the sealing ring is provided with a polytetrafluoroethylene coating.

[0008] Preferably, the sealing ring is in sliding contact with the second annular housing.

[0009] Preferably, the sealing ring is made of fluororubber.

[0010] The beneficial effects of this utility model are as follows: When using this full-bore pipeline fast explosion-proof valve, the flange is connected to the external pipeline, the sealing ring is in close contact with the end face of the external pipeline, and the disc spring is compressed, thus ensuring good sealing between the flange and the external pipeline. When an impact occurs in the external pipeline, the disc spring can undergo a certain deformation to buffer the impact. Furthermore, when the sealing ring ages, the spring force can push the sealing ring outwards, making it tightly fit against the end face of the external pipeline, ensuring a seal. Additionally, when an impact from the external pipeline is transmitted to the flange, the flange transmits the impact to the damper. The damping fluid, through its own viscosity, generates friction between molecules and with contacting components. Simultaneously, when flowing within a specific channel, it generates pressure loss due to throttling, converting impact kinetic energy into heat energy dissipation, thereby reducing the impact and minimizing the direct impact on the compensating sealing structure and gate-type explosion-proof valve. When the external pipeline heats up rapidly, the paraffin-based deformable material gradually changes from a solid to a liquid state. During this phase change, it continuously absorbs a large amount of heat, but its own temperature remains relatively stable and does not rise synchronously with the ambient temperature, thus reducing the heat's effect on the sealing ring and maintaining a relatively stable temperature of the sealing ring. In summary, this invention utilizes a damping fluid in the buffer mechanism to absorb the impact kinetic energy of external pipelines, reducing the impact on the sealing structure and explosion-proof valve. The paraffin-based deformation material in the temperature regulation mechanism stabilizes the temperature through phase change heat absorption, protecting the sealing ring. In the compensating sealing structure, the disc spring ensures initial sealing, assists in buffering impacts, and can also lift the sealing ring to maintain a seal when it ages. The overall structure balances impact buffering, temperature control, and sealing assurance during the explosion-proof process, improving the safety and service life of the device. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0012] Figure 2 This is a perspective view of the flange in this utility model.

[0013] Figure 3 This is an internal sectional view of the flange in this utility model.

[0014] Figure 4 This utility model Figure 3 A partial view at point A in the middle.

[0015] Figure 5 This is a perspective view of the compensating sealing structure in this utility model.

[0016] Legend: 1. Gate-type explosion-proof valve; 2. Flange; 3. Buffer mechanism; 301. First annular housing; 302. Damping fluid; 4. Temperature regulating mechanism; 401. Second annular housing; 402. Paraffin-based deformable material; 5. Compensating sealing structure; 501. Butterfly spring; 502. Rigid support ring; 503. Sealing ring; 5031. Polytetrafluoroethylene coating. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] Specific implementation examples are given below.

[0019] See Figures 1-5 In this embodiment of the utility model, the full-bore pipeline fast explosion-proof valve includes a gate-type explosion-proof valve 1, a flange 2, a buffer mechanism 3, a temperature regulating mechanism 4, and a compensating sealing structure 5. A flange 2 is fixed on each of the left and right sides of the gate-type explosion-proof valve 1. The flange 2 is used to connect with external pipelines. A buffer mechanism 3 is fixed on the outer ring of each flange 2. The buffer mechanism 3 is used to buffer the impact from external pipelines. A temperature regulating mechanism 4 is fixed inside the flange 2. A compensating sealing structure 5 is installed on the inner side of the temperature regulating mechanism 4 inside the gate-type explosion-proof valve 1. The compensating sealing structure 5 is used to seal when the flange 2 is connected to the external pipeline to prevent leakage.

[0020] The buffer mechanism 3 includes a first annular housing 301 and a damping fluid 302. The first annular housing 301 is fixed to the outside of the flange 2. The first annular housing 301 is filled with damping fluid 302. When the impact from the external pipeline is transmitted to the flange 2, the flange 2 transmits the impact to the damping fluid 302. The damping fluid 302 causes friction between molecules and with contacting parts through its own viscosity. At the same time, when it flows in a specific flow channel, it generates pressure loss due to throttling effect, converting the impact kinetic energy into heat energy dissipation, thereby reducing the impact and reducing the direct impact on the compensating sealing structure 5 and the gate-type explosion-proof valve 1.

[0021] The temperature regulating mechanism 4 includes a second annular shell 401 and a paraffin-based deformable material 402. The second annular shell 401 is fixed inside the flange 2. The second annular shell 401 is made of stainless steel, which gives it good strength and thermal conductivity. The second annular shell 401 is filled with paraffin-based deformable material 402. When the external pipeline heats up rapidly, the paraffin-based deformable material 402 gradually changes from solid to liquid. During this phase change process, it will continuously absorb a large amount of heat, but its own temperature will remain basically stable and will not rise synchronously with the ambient temperature, thereby reducing the heat's effect on the temperature rise of the compensating sealing structure 5.

[0022] The compensating sealing structure 5 includes: a butterfly spring 501, a rigid support ring 502, and a sealing ring 503. Multiple butterfly springs 501 are fixedly installed inside the flange 2. The butterfly springs 501 are fixedly connected to the rigid support ring 502. The sealing ring 503 is fixed to the front side of the rigid support ring 502. The sealing ring 503 slides in contact with the second annular housing 401. A polytetrafluoroethylene (PTFE) coating 5031 is provided on the front side of the sealing ring 503. The PTFE coating 5031 can significantly reduce the coefficient of friction of the sealing surface to reduce wear and improve resistance to high and low temperatures. With excellent chemical corrosion resistance, it can also fill minor scratches on the sealing surface, enhancing sealing reliability and extending service life. During installation, the sealing ring 503 is in close contact with the end face of the external pipeline, and the disc spring 501 is compressed, thus ensuring good sealing between the flange 2 and the external pipeline. When the external pipeline experiences an impact, the disc spring 501 can undergo a certain deformation to buffer the impact. In addition, when the sealing ring 503 ages, the elasticity of the disc spring 501 can push the sealing ring 503 outward, making it tightly fit against the end face of the external pipeline, ensuring a seal.

[0023] The sealing ring 503 is made of fluororubber, which gives it good high temperature resistance.

[0024] Working Principle: This full-bore pipeline fast-acting explosion-proof valve, in use, connects flange 2 to the external pipeline. The sealing ring 503 is in tight contact with the end face of the external pipeline, and the disc spring 501 is compressed, thus ensuring a good seal between flange 2 and the external pipeline. When an impact occurs in the external pipeline, the disc spring 501 can deform to buffer the impact. Additionally, when the sealing ring 503 ages, the elasticity of the disc spring 501 can push the sealing ring 503 outwards, making it tightly fit against the end face of the external pipeline, ensuring a seal. Furthermore, when an impact from the external pipeline is transmitted to flange 2, flange 2 transmits the impact to the damping fluid. 302, the damping fluid 302 generates friction between molecules and with contacting parts through its own viscosity. At the same time, when flowing in a specific flow channel, it generates pressure loss due to throttling effect, converting impact kinetic energy into heat energy dissipation, thereby reducing the impact and reducing the direct impact on the compensating sealing structure 5 and the gate-type explosion-proof valve 1. When the external pipeline heats up rapidly, the paraffin-based deformable material 402 gradually changes from solid to liquid. During this phase change process, it continuously absorbs a large amount of heat, but its own temperature remains basically stable and does not rise synchronously with the ambient temperature, thereby reducing the heat's effect on the temperature rise of the sealing ring 503 and keeping the temperature of the sealing ring 503 relatively stable.

[0025] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] 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 fast explosion-proof valve for full-bore pipelines, characterized in that... The device includes a gate-type explosion-proof valve (1), a flange (2), a buffer mechanism (3), a temperature regulating mechanism (4), and a compensating sealing structure (5). The gate-type explosion-proof valve (1) is located at the center of the device. The flange (2) is fixed on the left and right sides of the gate-type explosion-proof valve (1). The buffer mechanism (3) is fixed on the outer ring of the flange (2). The temperature regulating mechanism (4) is fixed inside the flange (2). The compensating sealing structure (5) is installed inside the temperature regulating mechanism (4).

2. The full-bore pipeline fast explosion-proof valve as described in claim 1, characterized in that... The buffer mechanism (3) includes a first annular housing (301) and a damping fluid (302). The first annular housing (301) is fixed to the outside of the flange (2) and is filled with damping fluid (302).

3. The full-bore pipeline fast explosion-proof valve as described in claim 2, characterized in that... The first annular housing (301) and the flange (2) are fixedly connected by threads or welding.

4. The full-bore pipeline fast explosion-proof valve as described in claim 1, characterized in that... The temperature regulating mechanism (4) includes a second annular shell (401) and a paraffin-based deformable material (402). The second annular shell (401) is fixed inside the flange (2) and is filled with the paraffin-based deformable material (402).

5. The full-bore pipeline fast explosion-proof valve as described in claim 4, characterized in that... The second annular housing (401) and the flange (2) are fixedly connected by an embedded structure.

6. The full-bore pipeline fast explosion-proof valve as described in claim 1, characterized in that... The compensating sealing structure (5) includes a butterfly spring (501), a rigid support ring (502) and a sealing ring (503). The butterfly spring (501) is fixedly installed inside the flange (2) and fixedly connected to the rigid support ring (502). The sealing ring (503) is fixed on the front side of the rigid support ring (502).

7. The full-bore pipeline fast explosion-proof valve as described in claim 6, characterized in that... The front side of the sealing ring (503) is provided with a polytetrafluoroethylene coating (5031).

8. The full-bore pipeline fast explosion-proof valve as described in claim 6, characterized in that... The sealing ring (503) is made of fluororubber.

9. The full-bore pipeline fast explosion-proof valve as described in claim 1, characterized in that... The damping fluid (302) in the buffer mechanism (3) dissipates the impact kinetic energy through viscosity and throttling effect.

10. The full-bore pipeline fast explosion-proof valve as described in claim 1, characterized in that... The paraffin-based deformable material (402) in the temperature regulation mechanism (4) absorbs heat and maintains temperature stability during the phase change process.

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