Pipe explosion-proof reinforcing structure related to chemical production safety

Abstract

The utility model discloses a pipeline explosion -proof reinforced structure related to chemical safety production for solving the explosion risk caused by the pressure fluctuation in the pipe in the existing pipeline. It includes main pipeline and pipeline explosion -proof tank, and the pipeline explosion -proof tank is installed at the space directly above the main pipeline through the support steel column, wherein, the pipeline explosion -proof tank is the tank body that sets up from top to bottom top cover, cylinder shell, conical shell and standpipe, and the standpipe top end is located in the tank body and fixed installation air bag, and the standpipe lower extreme carries out mechanical seal connection with the branch pipe on the main pipeline through the flange structure. The utility model discloses through the branch pipe that leads out on the original main pipeline and inserts a pipeline explosion -proof tank, and the pipeline explosion -proof tank is located directly above the main pipeline, and realizes the adjustment to the main pipeline pressure through the built -in air bag and rubber membrane.

Description

Technical Field

[0001] This utility model relates to the field of chemical safety production technology. Background Technology

[0002] In chemical production processes, explosion-proof design of chemical pipelines is an important aspect, which plays a positive role in preventing accidents and ensuring the safety of personnel and equipment.

[0003] In pipeline pressure rating design, the design pressure of the pipeline must fully consider the possible highest and lowest pressures (including pump shut-off pressure, safety valve opening pressure, blockage conditions, chemical decomposition gas production, etc.). Changes in pipeline pressure can cause chemical leaks and potentially lead to explosions in chemical production. Existing technical literature provides relevant examples, such as Chinese patent CN223306388U, which describes a high-sealing safety valve for natural gas pipelines. This technology uses a protective sleeve and a raised ring to form a closed space, completely enclosing the fasteners and effectively isolating them from external dust, moisture, and corrosive media, preventing thread corrosion or blockage. Another example is CN222925192U, which discloses an explosion-proof reinforced structure for pipelines used in chemical safety production, including a flame-retardant ring, a connecting ring, and a safety chemical pipeline. This technology uses a reinforced cavity formed inside the flame-retardant ring, and the interior of the flame-retardant ring is filled with a flame-retardant layer. Therefore, the addition of the flame-retardant layer creates a flame-retardant protection effect both inside and outside the flame-retardant ring.

[0004] The two technical approaches described above differ in their approaches. First, pressure relief under ultra-high pressure conditions is feasible for low-risk chemical raw materials but not for high-risk ones. Second, a pressure-resistant and flame-retardant structural design is employed, but this approach only addresses weak points and does not fundamentally solve the problem. Therefore, this invention addresses this issue by providing a structural design that effectively buffers pipeline pressure changes and prevents explosions. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an explosion-proof reinforced structure for pipelines involved in chemical safety production, which is used to solve the explosion risk caused by pressure fluctuations inside existing pipelines.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0007] A pipeline explosion-proof reinforcement structure related to chemical safety production includes a main pipeline and a pipeline explosion-proof tank. The pipeline explosion-proof tank is installed above the main pipeline via supporting steel columns. The tank body consists of a top cover, a cylindrical shell, a conical shell, and a vertical pipe arranged from top to bottom. The top of the vertical pipe is located inside the tank and a gasbag is fixedly installed therein. The lower end of the vertical pipe is mechanically sealed to a branch pipe on the main pipeline via a flange structure.

[0008] Furthermore, the cylindrical shell and the conical shell, as well as the cylindrical shell and the top cover, are all connected by flanges.

[0009] Furthermore, a rubber membrane is provided at the flange connection mating surface between the cylindrical shell and the conical shell. The rubber membrane is reinforced by the upper and lower flanges to form a tight seal. The rubber membrane divides the internal space of the pipeline explosion-proof tank into a lower primary pressure zone and an upper secondary pressure zone.

[0010] Furthermore, the material and thickness of the explosion-proof pipeline tank are comparable to those of the main pipeline, providing better corrosion resistance and strength to meet the needs of safe production.

[0011] Furthermore, the internal spaces of the primary pressure zone and the secondary pressure zone are pre-filled with inert gas.

[0012] Furthermore, the air pressure in the primary pressure zone is less than or equal to the air pressure in the secondary pressure zone.

[0013] Furthermore, the effective volume in the secondary pressure zone is greater than the effective volume in the primary pressure zone, thereby increasing the upper limit of the structure's effective pressure-bearing capacity.

[0014] Furthermore, a pressure gauge is installed on the tank in the secondary pressure zone to observe and display the air pressure value in the secondary pressure zone.

[0015] Furthermore, an air inlet is provided on the pipe wall corresponding to the primary and secondary pressure zones mentioned above, and a valve is installed on the air inlet. The valve is opened during air inflation and closed after air inflation is completed.

[0016] Furthermore, a piston plate is provided in the secondary pressure-bearing zone, and a spring is provided in the interval between the piston plate and the top cover. The spring is a compression spring and has the function of elastic support.

[0017] Furthermore, the airbag is fixed to the vertical pipe by a stainless steel hoop.

[0018] Furthermore, the inner wall of the aforementioned explosion-proof pipeline tank has an enamel lining, which provides corrosion protection.

[0019] Furthermore, the top cover is an arc-shaped top cover or a flat top cover to achieve a seal on the top.

[0020] Furthermore, the branch pipe and the vertical pipe are connected by a flange.

[0021] Furthermore, the conical shell is fixedly installed on the foundation by four supporting steel columns, forming a four-point support.

[0022] Furthermore, the vertical tube is welded and fixed to the lowest point of the conical shell.

[0023] The beneficial effects of this utility model are:

[0024] This invention introduces a branch pipe extending from the existing main pipeline and connecting it to a pipeline explosion-proof container. The pipeline explosion-proof container is located directly above the main pipeline and uses a built-in airbag and rubber diaphragm to regulate the pressure of the main pipeline, thereby preventing explosions caused by excessive pressure. This solves the problem of explosion risks caused by pressure fluctuations in existing pipelines. The detailed effects of this invention will be further explained with reference to specific embodiments. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention.

[0026] Figure 2 This is a cross-sectional view of the present invention.

[0027] Figure 3 This is a diagram showing the normal working state of this utility model.

[0028] Figure 4 This is a schematic diagram illustrating the working principle when the pressure in the main pipeline 100 increases abnormally.

[0029] Figure 5 This is a structural illustration of Example 2.

[0030] In the picture:

[0031] 100. Main pipe; 110. Branch pipe; 200. Pipe explosion-proof tank; 210. Conical shell; 211. Supporting steel column; 212. Vertical pipe; 213. Airbag; 220. Cylindrical shell; 230. Top cover; 240. Rubber diaphragm; 250. Primary pressure zone; 260. Secondary pressure zone; 300. Pressure gauge; 400. Inflation port; 500. Piston plate; 510. Spring. Detailed Implementation

[0032] An explosion-proof reinforcement structure for pipelines involved in chemical safety production is proposed. The implementation of this technology is based on the design of the original main pipeline 100, and a pipeline explosion-proof tank 200 is introduced. The pipeline explosion-proof tank 200 buffers the pipeline pressure in the main pipeline 100, thereby solving the existing safety hazards.

[0033] Example 1, this example will be described in conjunction with the appendix to the specification. Figure 1 To be continued Figure 4 A detailed introduction will be provided.

[0034] A branch pipe 110 is extended upwards from the existing main pipe 100, forming a tee pipe structure. A flange is installed on the branch pipe 110 extending upwards from the main pipe 100, and a pipe explosion-proof container 200 is installed through the flange connection. The pipe explosion-proof container 200 consists of two sections, an upper and a lower section, which is a conical shell 210. The conical shell 210 is fixed to the foundation by four supporting steel columns 211, forming a four-point support. During installation, the four supporting steel columns 211 are arranged in pairs on both sides of the main pipe 100, with the installed conical shell 210 positioned directly above the pipe. A hole is drilled at the lowest point of the conical shell 210, and a vertical pipe 212 is welded and fixed thereon. A flange is installed at the lower end of the vertical pipe 212, and the connection and fastening to the branch pipe 110 extending upwards from the main pipe is achieved through the flange and high-strength bolts. Meanwhile, the upper section of the vertical pipe 212 is located inside the explosion-proof pipe tank 200, and an airbag 213 is fixedly installed at the top of the vertical pipe 212. The airbag 213 is fixedly connected to the vertical pipe 212, so that the pressure inside the pipe is the same as the pressure inside the airbag 213.

[0035] Furthermore, the stainless steel hoop used to fix the airbag 213 ensures a secure fixation of the airbag 213.

[0036] The upper section of the explosion-proof pipeline tank 200 is a cylindrical shell 220, which is connected to the conical shell 210 by a flange. A top cover 230 is fixedly installed on the top of the cylindrical shell 220 via a flange connection. The top cover 230 can be an arc-shaped top cover or a flat top cover to achieve a seal at the top. Specifically, flanges are installed at the mating surfaces of the two components and fastened with high-strength bolts. A circular flexible rubber membrane 240 is placed at the mating surfaces, and the membrane 240 is reinforced by upper and lower flanges to form a tight seal. The membrane 240 divides the internal space of the explosion-proof pipeline tank 200 into two parts. That is, the space above the membrane 240 is the secondary pressure-bearing zone 260, and the space below the membrane 240 is the primary pressure-bearing zone 250.

[0037] Furthermore, the material and thickness of the aforementioned explosion-proof pipeline tank 200 are comparable to those of the main pipeline 100, providing better corrosion resistance and strength to meet the needs of safe production. In this embodiment, the explosion-proof pipeline tank 200 is self-contained and provides storage and restraint space for the airbag 213. The airbag 213 can expand or contract within the explosion-proof pipeline tank 200, effectively preventing its explosion. Even if the airbag 213 ruptures due to material defects, the chemical liquid raw materials will still be confined within the explosion-proof pipeline tank 200, preventing spillage or leakage and ensuring the safety of the entire production system.

[0038] Furthermore, the internal spaces of the primary pressure zone 250 and the secondary pressure zone 260 are pre-filled with an inert gas, such as helium, at a pressure higher than atmospheric pressure. This pressurized inert gas allows an elastic compressed space to be formed inside the tank.

[0039] Furthermore, a pressure gauge 300 is installed on the tank body of the aforementioned secondary pressure zone 260 to observe and display the air pressure value within the secondary pressure zone 260.

[0040] Furthermore, an air inlet 400 is provided on the pipe wall corresponding to the primary pressure zone 250 and the secondary pressure zone 260, and a valve (not shown in the figure) is installed on the air inlet 400. The valve is opened during air inflation and closed after air inflation is completed. The air pressure in the two pressure zones can be adjusted through the air inlet 400 to meet the needs of different production processes.

[0041] Depending on the production process, different air pressures are configured in the two pressure zones. There are three main configurations: First, both pressure zones have normal atmospheric pressure. Second, both pressure zones have high pressure, exceeding one standard atmosphere. Third, the air pressure in the secondary pressure zone (260°C) is higher than the air pressure in the primary pressure zone (250°C). The advantages and disadvantages of these configurations will be explained below in conjunction with specific working processes.

[0042] Furthermore, the effective volume within the secondary pressure zone 260 is significantly larger than the effective volume of the primary pressure zone 250, thereby increasing the upper limit of the structure's effective pressure-bearing capacity. For example, the effective volume within the primary pressure zone 250 is 10 liters, while the effective volume within the secondary pressure zone 260 is 100 liters, which is ten times that of the primary pressure zone 250.

[0043] Furthermore, the inner wall of the aforementioned explosion-proof pipeline tank 200 has an enamel lining, which provides corrosion protection.

[0044] The working process and explosion-proof principle of this embodiment are as follows:

[0045] In operation, the primary pressure zone 250 and secondary pressure zone 260 are filled with twice the atmospheric pressure, approximately 200 kPa. Under this pressure, the pressure inside the air bladder 213 is slightly higher than the pressure in the pressure zones. For example, the pressure of the chemical liquid in the main pipeline 100 is slightly higher than the pressure in the tank's pressure zones, causing the air bladder 213 to be in a slightly expanded state. When the pressure in the pipeline fluctuates, for example, when the pressure in the pipeline increases, the pressure inside the air bladder 213 also increases, resulting in an increase in the volume of the air bladder 213. Figure 3During the expansion of the airbag 213, the gas in the primary pressure zone 250 is compressed, providing space for the airbag 213 to expand. If the gas pressure in the pipeline continues to increase, the gas pressure in the primary pressure zone 250 will be significantly higher than that in the secondary pressure zone 260. Under the action of this pressure, the intermediate rubber diaphragm 240 bulges upward, and the airbag 213 continues to expand. During this process, the liquid in the main pipeline 100 also fills the airbag 213, achieving a rapid reduction in the liquid pressure in the main pipeline 100. Conversely, when the liquid pressure in the main pipeline 100 decreases, the volume of the airbag 213 shrinks, achieving a buffering effect on the liquid pressure. In the above process, the inert gas in the primary pressure zone 250 and the secondary pressure zone 260 acts as an elastic compression medium, achieving a buffering effect on the liquid pressure in the pipeline, effectively preventing local overpressure and avoiding explosion accidents.

[0046] Example 2: This example has the same structural design as Example 1. The difference is that during the nitrogen filling process, the air pressure in the secondary pressure zone 260 is significantly greater than the air pressure in the primary pressure zone 250. Under this setting, the rubber membrane 240 has an initial state of slightly downward concavity. This state causes the rubber membrane 240 to concave downward and provide auxiliary elastic support for the airbag 213, forming a stepped pressure layer.

[0047] Example 3, reference Figure 5 A piston plate 500, which can be a nylon plate, is provided within the secondary pressure-bearing zone 260. A spring 510, a compression spring, is provided between the nylon plate and the top cover 230, providing elastic support. The presence of the nylon plate effectively enhances the pressure-bearing capacity of the secondary pressure-bearing zone 260 and allows for self-resetting under the action of the spring 510.

Claims

1. A pipeline explosion-proof reinforcement structure related to chemical safety production, comprising a main pipeline (100) and a pipeline explosion-proof tank (200), characterized in that, The explosion-proof pipeline tank (200) is located in the space directly above the main pipeline (100). The explosion-proof pipeline tank (200) is a tank body composed of a top cover (230), a cylindrical shell (220), a conical shell (210) and a vertical pipe (212) arranged from top to bottom. The top of the vertical pipe (212) is located inside the tank body and an airbag (213) is fixedly installed thereon. The lower end of the vertical pipe (212) is mechanically sealed to the branch pipe (110) on the main pipeline (100) through a flange structure.

2. The explosion-proof reinforced structure for pipelines related to chemical safety production according to claim 1, characterized in that, A rubber membrane (240) is provided at the mechanical connection mating surface between the cylindrical shell (220) and the conical shell (210). The rubber membrane (240) is reinforced and fastened by upper and lower flanges. The rubber membrane (240) divides the internal space of the pipeline explosion-proof tank (200) into a lower primary pressure zone (250) and an upper secondary pressure zone (260).

3. The explosion-proof reinforced structure for pipelines related to chemical safety production according to claim 2, characterized in that, The internal spaces of the primary pressure zone (250) and the secondary pressure zone (260) contain inert gas.

4. The explosion-proof reinforced structure for pipelines related to chemical safety production according to claim 3, characterized in that, The air pressure in the primary pressure zone (250) is less than or equal to the air pressure in the secondary pressure zone (260).

5. The explosion-proof reinforcement structure for pipelines related to chemical safety production according to claim 4, characterized in that, The effective volume of the secondary pressure zone (260) is greater than the effective volume of the primary pressure zone (250).

6. The explosion-proof reinforcement structure for pipelines related to chemical safety production according to claim 5, characterized in that, The secondary pressure zone (260) is provided with a piston plate (500), and a spring (510) is provided between the piston plate (500) and the top cover (230).

7. The explosion-proof reinforced structure for pipelines related to chemical safety production according to claim 2, characterized in that, The cylindrical shell (220) and the conical shell (210), as well as the cylindrical shell (220) and the top cover (230), are all connected by flanges.

8. The explosion-proof reinforced structure for pipelines related to chemical safety production according to claim 2, characterized in that, A pressure gauge (300) is installed on the tank body of the secondary pressure zone (260).

9. A pipeline explosion-proof reinforcement structure related to chemical safety production according to claim 2, characterized in that, An air inlet (400) and a valve are installed on the pipe wall corresponding to the primary pressure zone (250) and the secondary pressure zone (260).

10. The explosion-proof reinforcement structure for pipelines related to chemical safety production according to claim 1, characterized in that, The airbag (213) is fixed to the vertical pipe (212) by a stainless steel hoop.

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