Explosion-proof device for LNG storage tank

Abstract

The utility model relates to an explosion-proof device for an LNG (Liquefied Natural Gas) storage tank, which aims to solve the technical problems that the existing LNG storage tank is easily influenced by the surrounding environment in the transportation or storage process, the internal pressure of the LNG storage tank is increased due to high temperature or vibration, the LNG storage tank explodes when the pressure is too high, and safety accidents are caused, and comprises an LNG storage tank body, an auxiliary mechanism is arranged at the top of the LNG storage tank body, and an adjusting assembly is arranged in the auxiliary mechanism; the auxiliary mechanism comprises a first flange, the first flange is fixed to the top end of the LNG storage tank body, a sealing gasket is attached to the upper surface of the first flange, and a second flange is attached to the upper surface of the sealing gasket. And through cooperation of the pressure sensor body, the controller body and the buzzer body, the pressure in the auxiliary tank can be effectively monitored and early warned, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of LNG storage tanks, in particular to an explosion-proof device for an LNG storage tank. Background Art

[0002] The main component of liquefied natural gas (LNG) is methane, which is recognized as the cleanest fossil energy. It is colorless, odorless, non-toxic and non-corrosive. During the combustion process, it has a large useful work, a large amount of converted heat energy and little pollution, so it is widely used. LNG is usually transported and stored in LNG storage tanks.

[0003] Existing LNG storage tanks are vulnerable to the surrounding environment during transportation or storage. High temperature or vibration can cause an increase in the internal pressure of the LNG storage tank. When the pressure is too high, it will cause the LNG storage tank to explode, resulting in safety accidents. In view of this, we propose an explosion-proof device for an LNG storage tank. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and meet the actual needs, and provide an explosion-proof device for an LNG storage tank to solve the technical problem that the existing LNG storage tank is vulnerable to the surrounding environment during transportation or storage, and high temperature or vibration will cause an increase in the internal pressure of the LNG storage tank. When the pressure is too high, it will cause the LNG storage tank to explode, resulting in safety accidents.

[0005] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is: designing an explosion-proof device for an LNG storage tank, including an LNG storage tank body, an auxiliary mechanism is arranged on the top of the LNG storage tank body, and an adjustment component is arranged inside the auxiliary mechanism;

[0006] The auxiliary mechanism includes a first flange, the first flange is fixed to the top end of the LNG storage tank body, a sealing gasket is attached to the upper surface of the first flange, a second flange is attached to the upper surface of the sealing gasket, and a number of bolt assemblies are uniformly penetrated through the first flange, the sealing gasket and the second flange. A limiting cylinder is fixedly connected inside the second flange, an auxiliary tank is fixedly connected to the upper end of the limiting cylinder, a discharge port is arranged in the middle of the right end face of the auxiliary tank, a controller body is arranged above the discharge port, a buzzer body is arranged on the top of the auxiliary tank, and a pressure sensor body is arranged inside the auxiliary tank.

[0007] Preferably, the second flange and the first flange form a detachable structure through bolt assemblies, and the sealing gasket is clamped between the first flange and the second flange in a matching manner.

[0008] Preferably, the second flange and the limiting cylinder are integrally formed, and the limiting cylinder is communicated with the auxiliary tank.

[0009] Preferably, the adjusting assembly includes a hollow frame disposed inside the limiting cylinder. A number of support plates are evenly distributed on the outside of the hollow frame. A movable rod is engaged inside the hollow frame. A spring is sleeved on the outside of the movable rod. The top end of the movable rod is fixedly connected with an adjusting plate.

[0010] Preferably, the hollow frame and the support plates are integrally formed. The hollow frame is fixedly connected to the limiting cylinder through the support plates. The outer side wall of the adjusting plate fits snugly with the inner wall of the limiting cylinder.

[0011] Preferably, the movable rod is in an inverted T shape. The movable rod and the hollow frame form an elastic structure through the spring.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The present utility model can effectively balance the pressure inside the LNG storage tank body through the auxiliary tank, avoiding explosion caused by continuous high pressure inside the LNG storage tank body. Through the cooperation among the pressure sensor body, the controller body and the buzzer body, the pressure inside the auxiliary tank can be effectively monitored and warned, improving safety. The detachable structure formed by the second flange and the first flange through the bolt assembly facilitates the subsequent maintenance and replacement of the components above the second flange.

[0014] 2. When the pressure inside the LNG storage tank body is too high due to the influence of the external environment in the present utility model, the high pressure pushes the adjusting plate to move upward, and the spring is compressed. At this time, the channel between the limiting cylinder and the auxiliary tank is opened, and the pressure is released. Then the spring gradually returns to its original state, and the adjusting plate also gradually returns to its original position, sealing the channel between the limiting cylinder and the auxiliary tank again, avoiding potential safety hazards caused by negative pressure inside the LNG storage tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the partial disassembled structure of the present utility model;

[0017] Figure 3 is a schematic diagram of the partial sectional structure of the auxiliary mechanism of the present utility model;

[0018] Figure 4 is a schematic diagram of the partial sectional structure of the adjusting assembly of the present utility model;

[0019] In the figure: 1, LNG storage tank body; 2, auxiliary mechanism; 3, adjusting assembly;

[0020] 201, First flange; 202, Gasket; 203, Second flange; 204, Bolt assembly; 205, Limiting cylinder; 206, Auxiliary tank; 207, Discharge port; 208, Controller body; 209, Buzzer body; 210, Pressure sensor body

[0021] 301, Hollow frame; 302, Support plate; 303, Movable rod; 304, Spring; 305, Adjusting plate Detailed implementation mode

[0022] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0023] An explosion-proof device for an LNG storage tank, see Figures 1 to 4 , including an LNG storage tank body 1, an auxiliary mechanism 2 is provided at the top of the LNG storage tank body 1, and an adjusting assembly 3 is provided inside the auxiliary mechanism 2;

[0024] The auxiliary mechanism 2 includes a first flange 201, the first flange 201 is fixed to the top end of the LNG storage tank body 1, a gasket 202 is attached to the upper surface of the first flange 201, a second flange 203 is attached to the upper surface of the gasket 202, and a plurality of bolt assemblies 204 uniformly penetrate through the first flange 201, the gasket 202 and the second flange 203. Among them, the second flange 203 and the first flange 201 form a detachable structure through the bolt assembly 204, the gasket 202 is clamped between the first flange 201 and the second flange 203, a limiting cylinder 205 is fixedly connected inside the second flange 203, an auxiliary tank 206 is fixedly connected to the upper end of the limiting cylinder 205. Further, the second flange 203 and the limiting cylinder 205 are integrally formed, the limiting cylinder 205 and the auxiliary tank 206 are connected and communicated with each other, a discharge port 207 is provided in the middle of the right end face of the auxiliary tank 206, a controller body 208 is provided above the discharge port 207, a buzzer body 209 is provided at the top of the auxiliary tank 206, and a pressure sensor body 210 is provided inside the auxiliary tank 206. The present utility model can effectively balance the pressure inside the LNG storage tank body 1 through the auxiliary tank 206, avoid explosion caused by continuous high pressure inside the LNG storage tank body 1, and can effectively monitor and give early warning of the pressure inside the auxiliary tank 206 through the cooperation between the pressure sensor body 210, the controller body 208 and the buzzer body 209, improving safety. The detachable structure formed by the second flange 203 and the first flange 201 through the bolt assembly 204 facilitates the subsequent maintenance and replacement of the upper components of the second flange 203.

[0025] It should be noted that the adjusting component 3 includes a hollow frame 301, which is arranged inside the limiting cylinder 205. A number of support plates 302 are evenly distributed on the outside of the hollow frame 301. A movable rod 303 is clamped inside the hollow frame 301, and a spring 304 is sleeved on the outside of the movable rod 303. Among them, the movable rod 303 is in an inverted T shape, and the movable rod 303 and the hollow frame 301 form an elastic structure through the spring 304. The top end of the movable rod 303 is fixedly connected with an adjusting plate 305. It should be noted that the hollow frame 301 and the support plates 302 are integrally formed, and the hollow frame 301 is fixedly connected with the limiting cylinder 205 through the support plates 302. The outer side wall of the adjusting plate 305 is matched and fitted with the inner wall of the limiting cylinder 205. In the present utility model, when the internal pressure of the LNG storage tank body 1 is too high due to the influence of the external environment, the high pressure pushes the adjusting plate 305 to move upward, and the spring 304 is compressed. At this time, the channel between the limiting cylinder 205 and the auxiliary tank 206 is opened, and the pressure is released. Then the spring 304 gradually returns to its original state, and the adjusting plate 305 also gradually returns to its original position, sealing the channel between the limiting cylinder 205 and the auxiliary tank 206 again, avoiding corresponding safety hazards caused by the negative pressure inside the LNG storage tank body 1.

[0026] Working principle: When the internal pressure of the LNG storage tank body 1 is too high due to the influence of the external environment, the high pressure pushes the adjusting plate 305 to move upward, and the spring 304 is compressed. At this time, the channel between the limiting cylinder 205 and the auxiliary tank 206 is opened, and the pressure is released. The auxiliary tank 206 effectively balances the internal pressure of the LNG storage tank body 1, avoiding explosion caused by continuous high pressure inside the LNG storage tank body 1. Through the cooperation among the pressure sensor body 210, the controller body 208 and the buzzer body 209, the internal pressure of the auxiliary tank 206 can be monitored and warned. After the pressure is released, the spring 304 gradually returns to its original state, and the adjusting plate 305 also gradually returns to its original position, sealing the channel between the limiting cylinder 205 and the auxiliary tank 206 again, avoiding corresponding safety hazards caused by the negative pressure inside the LNG storage tank body 1.

[0027] The embodiments disclosed in the present utility model are the preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present utility model according to the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present utility model, they are within the protection scope of the present utility model.

Claims

1. An explosion-proof device for an LNG storage tank, comprising an LNG storage tank body (1), characterized in that, An auxiliary mechanism (2) is provided at the top of the LNG storage tank body (1), and an adjustment assembly (3) is provided inside the auxiliary mechanism (2). The auxiliary mechanism (2) includes a first flange (201), the first flange (201) is fixed to the top end of the LNG storage tank body (1), a sealing gasket (202) is attached to the upper surface of the first flange (201), a second flange (203) is attached to the upper surface of the sealing gasket (202), a number of bolt assemblies (204) uniformly penetrate through the first flange (201), the sealing gasket (202) and the second flange (203), a limiting cylinder (205) is fixedly connected inside the second flange (203), an auxiliary tank (206) is fixedly connected to the upper end of the limiting cylinder (205), a discharge port (207) is provided in the middle of the right end face of the auxiliary tank (206), a controller body (208) is provided above the discharge port (207), a buzzer body (209) is provided at the top of the auxiliary tank (206), and a pressure sensor body (210) is provided inside the auxiliary tank (206).

2. The explosion-proof device for an LNG storage tank according to claim 1, wherein The second flange (203) and the first flange (201) form a detachable structure through the bolt assembly (204), and the sealing gasket (202) is clamped between the first flange (201) and the second flange (203).

3. The explosion-proof device for an LNG storage tank according to claim 1, characterized in that, The second flange (203) and the limiting cylinder (205) are integrally formed, and the limiting cylinder (205) is communicated with the auxiliary tank (206).

4. The explosion-proof device for an LNG storage tank according to claim 1, characterized in that, The adjustment assembly (3) includes a hollow frame (301), the hollow frame (301) is arranged inside the limiting cylinder (205), a number of support plates (302) are evenly distributed outside the hollow frame (301), a movable rod (303) is clamped inside the hollow frame (301), a spring (304) is sleeved outside the movable rod (303), and an adjustment plate (305) is fixedly connected to the top end of the movable rod (303).

5. The explosion-proof device for an LNG storage tank according to claim 4, wherein, The hollow frame (301) and the support plates (302) are integrally formed, the hollow frame (301) is fixedly connected to the limiting cylinder (205) through the support plates (302), and the outer side wall of the adjustment plate (305) is matched and attached to the inner wall of the limiting cylinder (205).

6. The explosion-proof device for an LNG storage tank according to claim 4, wherein, The movable rod (303) is in an inverted T shape, and the movable rod (303) and the hollow frame (301) form an elastic structure through the spring (304).

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