An explosion-proof pressure relief protection device for a chemical dangerous and hazardous substance storage tank

Abstract

This utility model discloses an explosion-proof pressure relief protection device for a chemical hazardous materials storage tank, relating to the field of pressure relief technology. The device includes a liquefied petroleum gas (LPG) storage tank. A valve seat is welded to the top of the LPG storage tank, and a tee pipe is threaded onto the valve seat. A pressure relief and cooling structure is located on the LPG storage tank and includes a cooling pipe, a control valve, a pressure relief pipe, and multiple heat dissipation fins. During emergency pressure relief, high-pressure gas first flows through the cooling pipe. Multiple heat dissipation fins fixedly fitted to the outer surface of the cooling pipe quickly absorb the heat transferred from the high-temperature gas inside the pipe. Compared to the single-wall heat dissipation of ordinary straight pipes, the heat dissipation area is significantly increased, enhancing air convection and further accelerating heat dissipation. This causes the temperature of the high-temperature gas inside the cooling pipe to drop rapidly, preventing prolonged exposure of the cooling pipe wall to high temperatures, effectively slowing down the aging rate of the cooling pipe and extending its service life.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief technology, and in particular to an explosion-proof pressure relief protection device for chemical hazardous material storage tanks. Background Technology

[0002] During storage, liquefied petroleum gas (LPG), a hazardous chemical, is prone to pressure build-up due to fluctuations in ambient temperature, chemical reactions of the medium itself, or the accumulation of volatile gases in a confined space. This is especially true when LPG tanks are used at outdoor stalls, where excessively high temperatures can lead to excessively high pressure.

[0003] Existing pressure relief pipes are mostly ordinary straight metal pipes, which rely solely on natural convection between the pipe wall and the air for heat dissipation. This results in extremely low heat dissipation efficiency. When high-temperature media flow inside the pressure relief pipe for a long time, the pipe wall temperature will continue to rise, accelerating pipe aging and corrosion, reducing the structural strength of the pipe, and thus shortening the service life of the pressure relief pipe. Therefore, we propose an explosion-proof pressure relief protection device for chemical hazardous material storage tanks. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide an explosion-proof pressure relief protection device for chemical hazardous material storage tanks. This device can solve the problem that most existing pressure relief pipes are ordinary straight metal pipes, which rely solely on natural convection between the pipe wall and the air for heat dissipation, resulting in extremely low heat dissipation efficiency. When high-temperature media flow in the pressure relief pipe for a long time, the temperature of the pipe wall will continue to rise, accelerating pipe aging and corrosion, reducing the structural strength of the pipe, and thus shortening the service life of the pressure relief pipe.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof pressure relief protection device for chemical hazardous material storage tanks, comprising: The liquefied petroleum gas storage tank has a valve seat welded to the top, and a tee pipe is threaded onto the valve seat. The pressure relief and cooling structure is located on the liquefied petroleum gas storage tank; The pressure relief and cooling structure includes a cooling pipe, a control valve, a pressure relief pipe, and multiple heat dissipation fins. The control valve is threaded to one end of a three-way pipe, one end of the cooling pipe is threaded to the inside of the control valve, and the end of the cooling pipe away from the control valve is fixedly connected to the pressure relief pipe. Multiple heat dissipation fins are fixedly sleeved on the outer surface of the cooling pipe.

[0006] Preferably, the pressure relief and cooling structure further includes a flame arrester, which is bolted to the top of the pressure relief pipe and is connected to the interior of the pressure relief pipe.

[0007] Preferably, two flow grooves are formed on both sides of each of the plurality of heat dissipation fins.

[0008] Preferably, the top of the liquefied petroleum gas storage tank is fixedly connected with a support column and a support rod, and the top ends of the support column and the support rod are respectively fixedly connected to a cooling pipe.

[0009] Preferably, the end of the three-way pipe furthest from the valve seat is threaded with a pressure reducing valve.

[0010] Preferably, the cooling pipe is internally connected to the pressure relief pipe.

[0011] Preferably, a nameplate is fixedly connected to the outer surface of the liquefied petroleum gas storage tank.

[0012] Preferably, a handwheel is mounted on the top of the valve seat.

[0013] Preferably, a protective cover is fixedly connected to the top of the liquefied petroleum gas storage tank, and multiple hand-held slots are provided on the outer surface of the protective cover.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The explosion-proof pressure relief protection device for this chemical hazardous materials storage tank utilizes the principle that when high-pressure gas is released in an emergency, it first flows through the cooling pipe. Multiple heat dissipation fins fixedly fitted to the outer surface of the cooling pipe can quickly absorb the heat transferred by the high-temperature gas inside the pipe. Compared with the heat dissipation of a single pipe wall in ordinary straight pipes, the heat dissipation area is significantly increased, enhancing the air convection effect and further accelerating heat dissipation. This causes the temperature of the high-temperature gas inside the cooling pipe to drop rapidly, preventing high temperatures from acting on the cooling pipe wall for a long time, effectively slowing down the aging rate of the cooling pipe and extending its service life. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the pressure reducing valve structure of this utility model; Figure 3 This is a schematic diagram of the heat dissipation fin structure of this utility model; Figure 4 This is a schematic diagram of the pressure relief pipe structure of this utility model.

[0016] Attached reference numerals: 1. Liquefied petroleum gas storage tank; 2. Nameplate; 3. Protective cover; 4. Valve seat; 5. Pressure reducing valve; 6. Flame arrester; 7. Pressure relief pipe; 8. Hand-held slot; 9. T-connector; 10. Control valve; 11. Cooling pipe; 12. Heat dissipation fins; 13. Support column; 14. Support rod; 15. Flow channel. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Liquefied petroleum gas storage tank 1: Used to store liquefied petroleum gas, it is the core storage carrier of the entire system. Its internal pressure will change due to the evaporation of liquefied petroleum gas and the rise in temperature. Nameplate 2: Fixed on the outer surface of liquefied petroleum gas storage tank 1, used to mark key information such as the specifications, model, rated pressure, and production date of the storage tank, so as to facilitate the operation personnel to view and manage it; Valve seat 4: Welded to the top of liquefied petroleum gas storage tank 1, with a handwheel installed at the top and threadedly connected to the three-way pipe 9. It is a key connecting component for the external transmission of gas from inside the storage tank. Pressure reducing valve 5: It is threaded to the end of the three-way pipe 9 away from the valve seat 4, and can steadily reduce the pressure of the high-pressure gas delivered from the liquefied petroleum gas storage tank 1 so that the gas can safely enter the subsequent pipeline; Flame arrester 6: It is installed on the top of the pressure relief pipe 7 by bolts and is connected to the inside of the pressure relief pipe 7. It can effectively prevent external flames from entering the pressure relief pipe 7 and avoid flames from contacting the discharged combustible gas and causing combustion or explosion accidents. Pressure relief pipe 7: It is fixedly connected to the end of the cooling pipe 11 away from the control valve 10 and is internally connected. It is used to discharge the gas after cooling and is a safe pressure relief channel. Three-way pipe 9: One end is threaded to valve seat 4, the other end is threaded to pressure reducing valve 5, and the other end is connected to control valve 10, which plays the role of gas diversion, allowing high-pressure gas to flow to pressure reducing valve 5 or control valve 10 respectively. Control valve 10: It is threaded to one end of the tee pipe 9 and threaded to one end of the cooling pipe 11. When the internal pressure of the liquefied petroleum gas storage tank 1 rises sharply and needs to be released urgently, opening the control valve 10 can allow high-pressure gas to enter the cooling pipe 11. Cooling pipe 11: One end is connected to the internal thread of control valve 10, and the other end is fixedly connected to pressure relief pipe 7 and internally connected. It is used to transport high-pressure gas during emergency pressure relief and works with heat dissipation fins 12 to cool the gas. Heat dissipation fins 12: Multiple heat dissipation fins are fixedly sleeved on the outer surface of the cooling pipe 11, and flow grooves 15 are opened on both sides to increase the heat dissipation area, accelerate the heat dissipation of high-pressure gas in the cooling pipe 11, and reduce the gas temperature. Support column 13: One end is fixedly connected to the top of the liquefied petroleum gas storage tank 1, and the top end is fixedly connected to the cooling pipe 11, providing stable support for the cooling pipe 11 and preventing it from being displaced or damaged due to the impact of high-pressure gas and its own weight. Support rod 14: One end is fixedly connected to the top of the liquefied petroleum gas storage tank 1, and the top end is fixedly connected to the cooling pipe 11. It works in conjunction with the support column 13 to enhance the support stability of the cooling pipe 11. Flow groove 15: It is formed on both sides of each heat dissipation fin 12, which can increase the air flow area, further accelerate the heat dissipation of the heat dissipation fin 12, and improve the cooling efficiency of the gas in the cooling pipe 11.

[0022] Example 1: like Figure 1-4 As shown, if the internal pressure rises sharply and emergency pressure relief is required, the high-pressure gas enters the cooling pipe 11, which is threadedly connected to the control valve 10 at the other end of the three-way pipe 9. Multiple heat dissipation fins 12, fixedly sleeved on the outer surface of the cooling pipe 11, play a heat dissipation role, accelerating heat dissipation and rapidly reducing the temperature of the high-pressure gas flowing through the cooling pipe 11. This prevents the direct emission of high-temperature gas and avoids potential safety hazards, while also reducing damage to the cooling pipe 11. After being cooled down, the gas is discharged through the pressure relief pipe 7, which is fixedly connected to the cooling pipe 11 and internally connected. During the gas discharge process, the flame arrester 6, which is bolted to the top of the pressure relief pipe 7 and internally connected, can effectively prevent external flames from entering the interior of the pressure relief pipe 7, thus avoiding the flames from coming into contact with the flammable gas discharged from the pressure relief and causing combustion or explosion accidents, and ultimately achieving safe explosion-proof pressure relief of the liquefied petroleum gas storage tank 1.

[0023] Example 2: like Figure 3As shown, through the flow channel 15, which is set on both sides of the heat dissipation fin 12, when the high-pressure gas flows through the cooling pipe 11 and the heat is transferred to the heat dissipation fin 12 fixedly sleeved on the outer surface, the air can pass smoothly through the flow channel 15 between multiple heat dissipation fins 12, forming a more efficient air convection, which can more quickly remove the heat on the heat dissipation fin 12, thereby accelerating the cooling process of the high-temperature gas in the cooling pipe 11 and avoiding the high-temperature gas from staying in the cooling pipe 11 for a long time, which would cause the pipe wall temperature to be too high.

[0024] Furthermore, when using this device, if the pressure inside the liquefied petroleum gas storage tank 1 exceeds the safety threshold due to factors such as liquefied gas evaporation and temperature rise, it can be seen by observing the pressure gauge on the pressure reducing valve 5. The operator can open the relevant control passage by turning the handwheel installed on the top of the valve seat 4. At this time, the high-pressure gas inside the liquefied petroleum gas storage tank 1 first enters the three-way pipe 9 threadedly connected to the valve seat 4 through the valve seat 4 welded to the top. High-pressure gas can be smoothly reduced through the pressure reducing valve 5, which is threaded to the end of the three-way pipe 9 away from the valve seat 4, before entering the subsequent pipeline; if the internal pressure rises sharply and emergency pressure relief is required, the high-pressure gas will enter the cooling pipe 11, which is threaded to the inside of the control valve 10, through the control valve 10 connected to the other end of the three-way pipe 9. Multiple heat dissipation fins 12 fixedly sleeved on the outer surface of the cooling pipe 11 play a heat dissipation role. At the same time, the two flow grooves 15 opened on both sides of the heat dissipation fins 12 can increase the air flow area, accelerate heat dissipation, and make the temperature of the high-pressure gas flowing through the cooling pipe 11 drop rapidly, avoiding the safety hazards caused by the direct emission of high-temperature gas. It also reduces damage to the cooling pipe 11. In addition, the support column 13 and support rod 14 fixedly connected to the top of the liquefied petroleum gas storage tank 1 have their top ends fixedly connected to the cooling pipe 11, which can provide stable support for the cooling pipe 11 and prevent the cooling pipe 11 from being displaced or damaged under the impact of high-pressure gas and its own weight. After being cooled down, the gas is discharged through the pressure relief pipe 7, which is fixedly connected to the cooling pipe 11 and internally connected. During the gas discharge process, the flame arrester 6, which is bolted to the top of the pressure relief pipe 7 and internally connected, can effectively prevent external flames from entering the interior of the pressure relief pipe 7, thus avoiding the flames from coming into contact with the flammable gas discharged from the pressure relief and causing combustion or explosion accidents, and ultimately achieving safe explosion-proof pressure relief of the liquefied petroleum gas storage tank 1.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A chemical hazardous materials storage tank explosion-proof pressure relief protection device, characterized in that, include: A liquefied petroleum gas storage tank (1) is provided with a valve seat (4) welded to the top of the liquefied petroleum gas storage tank (1), and a three-way pipe (9) is threaded onto the valve seat (4). The pressure relief and cooling structure is located on the liquefied petroleum gas storage tank (1); The pressure relief and cooling structure includes a cooling pipe (11), a control valve (10), a pressure relief pipe (7), and multiple heat dissipation fins (12). The control valve (10) is threaded to one end of the tee pipe (9), and one end of the cooling pipe (11) is threaded to the inside of the control valve (10). Among them, the end of the cooling pipe (11) away from the control valve (10) is fixedly connected to the pressure relief pipe (7), and multiple heat dissipation fins (12) are fixedly sleeved on the outer surface of the cooling pipe (11).

2. The explosion-proof pressure relief protection device for a chemical hazardous materials storage tank according to claim 1, characterized in that: The pressure relief and cooling structure also includes a flame arrester (6), which is bolted to the top of the pressure relief pipe (7) and is internally connected to the pressure relief pipe (7).

3. The explosion-proof pressure relief protection device for a chemical hazardous materials storage tank according to claim 1, characterized in that: Two flow grooves (15) are provided on both sides of each of the multiple heat dissipation fins (12).

4. The explosion-proof pressure relief protection device for a chemical hazardous materials storage tank according to claim 1, characterized in that: The top of the liquefied petroleum gas storage tank (1) is fixedly connected to a support column (13) and a support rod (14), and the top ends of the support column (13) and the support rod (14) are fixedly connected to the cooling pipe (11) respectively.

5. The explosion-proof pressure relief protection device for a chemical hazardous materials storage tank according to claim 1, characterized in that: The end of the three-way pipe (9) away from the valve seat (4) is threaded with a pressure reducing valve (5).

6. The explosion-proof pressure relief protection device for a chemical hazardous materials storage tank according to claim 1, characterized in that: The cooling pipe (11) is internally connected to the pressure relief pipe (7).

7. The explosion-proof pressure relief protection device for a chemical hazardous materials storage tank according to claim 1, characterized in that: A nameplate (2) is fixedly connected to the outer surface of the liquefied petroleum gas storage tank (1).

8. The explosion-proof pressure relief protection device for a chemical hazardous materials storage tank according to claim 1, characterized in that: A handwheel is installed at the top of the valve seat (4).

9. The explosion-proof pressure relief protection device for a chemical hazardous materials storage tank according to claim 1, characterized in that: The top of the liquefied petroleum gas storage tank (1) is fixedly connected to a protective cover (3), and the outer surface of the protective cover (3) is provided with multiple hand-held slots (8).

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