Anti-leakage device for gas storage tank of LNG (Liquefied Natural Gas) filling station

Abstract

The utility model discloses an LNG (liquefied natural gas) filling station gas storage tank leakproof device which comprises a jacket and a gas storage tank body, the gas storage tank body is located in the middle of the jacket, a plurality of partition plates are fixedly connected to the inner wall of the jacket, an emptying opening is formed in the upper end of the gas storage tank body, one end of the jacket is fixedly connected with a sealing filling box, and the other end of the jacket is fixedly connected with a gas storage tank. A high-pressure inert gas tank is fixedly connected to the upper end of the sealed filling box, two conveying pipes are fixedly connected to the side end of the sealed filling box, filling pipes are installed at the side ends of the conveying pipes, anti-explosion electromagnetic valves are installed in the filling pipes, and a plurality of methane sensors are fixedly connected to the outer side end of a jacket at equal intervals; and the bottom of the jacket is fixedly connected with a base. The space in the jacket is divided into a plurality of independent small spaces through the partition plates, whether natural gas leaks or not is detected through the methane sensors in the corresponding small spaces, the corresponding small spaces are sealed when the natural gas leaks, and the sealing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of LNG filling stations, in particular to a gas storage tank anti-leakage device for an LNG filling station. Background Art

[0002] When storing and transporting LNG in gas tanks, it is necessary to prevent the leakage of flammable gas in the gas tanks. If flammable gas leaks out, it is very easy to cause safety accidents such as explosions, threatening personal and property safety and causing great impact. The long-term exposure of the gas tank to the air and the influence of the environment such as wind, sun and rain for a long time will greatly shorten the service life of the gas tank, or the gas tank will be corroded by unknown reasons inside, causing the tank body to crack and perforate, etc., and the flammable gas in the gas tank will leak and explode, threatening personal and property safety.

[0003] The patent publication number is "CN213018889U", and the patent name is "LNG filling station gas tank anti-leakage device", which includes a jacket arranged on the outside of the gas tank. The gas tank and the jacket are connected to form a cavity. Sealing filling mechanisms are provided on both sides of the jacket. The sealing filling mechanisms are connected to the cavity. Fillers are provided in the tank body of the sealing filling mechanism. The fillers are released to fill the cavity for sealing.

[0004] In the above device, after the sensor detects the natural gas leakage, the sealing filling mechanism releases the filler into the cavity to fill the cavity, thereby sealing the natural gas leakage site to prevent the gas tank from exploding due to the leakage of flammable gas. However, the cavity in the above device is a whole, and the natural gas leakage site may be distributed all over the surface of the gas tank. The cavity needs to be completely filled to ensure the sealing effect, resulting in low sealing efficiency of the gas tank. Utility Model Content

[0005] The utility model aims to provide a gas tank anti-leakage device for an LNG filling station, which can separate a plurality of independent small spaces in the device, seal the corresponding small spaces when natural gas leaks, and improve the sealing efficiency.

[0006] To achieve the above-mentioned purpose, a gas tank anti-leakage device for an LNG filling station is provided, comprising: a jacket and a gas tank body, wherein the gas tank body is located in the middle of the jacket, a plurality of partitions are fixedly connected to the inner wall of the jacket, and the gas tank body passes through the middle of the jacket and is fixedly connected to the jacket, an emptying port is installed at the upper end of the gas tank body, and the emptying port passes through the jacket upward, one end of the jacket is fixedly connected to a sealed filling box, the upper end of the sealed filling box is fixedly connected to a high-pressure inert gas tank, and the sealed filling box is communicated with the high-pressure inert gas tank, two delivery pipes are fixedly connected to the side end of the sealed filling box, and the other end of the delivery pipe passes through the jacket, a filling pipe is installed at the side end of the delivery pipe, an explosion-proof solenoid valve is installed in the filling pipe, a plurality of methane sensors are fixedly connected to the outer end of the jacket at equal distances, and the detection end of the methane sensor is located between the jacket and the gas tank body, the partition divides the internal space of the jacket into multiple, and the methane sensors are respectively located in the spaces separated by the partitions in the jacket, and a base is fixedly connected to the bottom of the jacket. It is possible to separate a plurality of independent small spaces in the device, and seal the corresponding small spaces when natural gas leaks, thereby improving the sealing efficiency.

[0007] According to the LNG filling station gas tank anti-leakage device, the filling pipes are respectively located in the spaces separated by the partitions in the jacket, and are used to fill the separated small spaces separately.

[0008] According to the LNG filling station gas tank anti-leakage device, the sealing filling box is provided with polyurethane foam adhesive, so that the filled adhesive is foamed and expanded to improve the sealing efficiency.

[0009] According to the LNG filling station gas tank anti-leakage device, the delivery pipe and the sealed filling box are connected by a flange, so that the device can be easily disassembled after leakage occurs in the device and the treatment is completed.

[0010] According to the LNG filling station gas tank anti-leakage device, the outer end of the delivery pipe is covered with a sealing rubber sleeve, and the sealing rubber sleeve is located between the delivery pipe and the partition, so as to facilitate the disassembly of the delivery pipe and ensure the sealing between the delivery pipe and the partition.

[0011] The above scheme has the beneficial effect of dividing the space in the jacket into multiple independent small spaces by the partition, and using the methane sensor in the corresponding small space to detect whether the natural gas is leaking, and sealing the corresponding small space when the natural gas leaks, thereby improving the sealing efficiency.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1 This is a three-dimensional structural diagram of a gas tank leakage prevention device for an LNG filling station according to the utility model;

[0015] Figure 2 This is a first cross-sectional structural diagram of a gas tank anti-leakage device for an LNG filling station according to the utility model;

[0016] Figure 3 This is a second cross-sectional structural diagram of a gas tank anti-leakage device for an LNG filling station according to the utility model;

[0017] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0018] Legend:

[0019] 1. Jacket; 2. Delivery pipe; 3. Base; 4. Sealed filling box; 5. High-pressure inert gas tank; 6. Exhaust port; 7. Methane sensor; 8. Gas tank body; 9. Partition; 10. Filling pipe; 11. Explosion-proof solenoid valve. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] Reference Figure 1-4 The utility model embodiment is a LNG filling station gas tank anti-leakage device, which includes: a jacket 1 and a gas tank body 8, the gas tank body 8 is located in the middle of the jacket 1, the inner wall of the jacket 1 is fixedly connected with a plurality of partitions 9, and the gas tank body 8 passes through the middle of the jacket 1 and is fixedly connected to the jacket 1, the upper end of the gas tank body 8 is equipped with an emptying port 6, and the emptying port 6 passes through the jacket 1 upward, one end of the jacket 1 is fixedly connected with a sealed filling box 4, the upper end of the sealed filling box 4 is fixedly connected with a high-pressure inert gas tank 5, and the sealed filling box 4 is connected with the high-pressure inert gas tank 5. The gas tank 5 is connected, and two delivery pipes 2 are fixedly connected to the side end of the sealed filling box 4, and the other end of the delivery pipe 2 passes through the jacket 1, and a filling pipe 10 is installed on the side end of the delivery pipe 2, and an explosion-proof solenoid valve 11 is installed in the filling pipe 10, and a plurality of methane sensors 7 are fixedly connected to the outer end of the jacket 1 at equal intervals, and the detection end of the methane sensor 7 is located between the jacket 1 and the gas tank body 8, and the partition 9 divides the internal space of the jacket 1 into multiple spaces, and the methane sensors 7 are respectively located in the spaces separated by the partition 9 in the jacket 1, and the bottom of the jacket 1 is fixedly connected to a base 3.

[0022] The filling pipes 10 are respectively located in the spaces separated by the partitions 9 in the jacket 1 .

[0023] The sealing filling box 4 is provided with polyurethane foam adhesive.

[0024] The delivery pipe 2 and the sealed filling box 4 are connected via a flange.

[0025] The outer end of the delivery pipe 2 is covered with a sealing rubber sleeve, and the sealing rubber sleeve is located between the delivery pipe 2 and the partition plate 9.

[0026] Working principle: When in use, the partition 9 divides the space in the jacket 1 into multiple independent small spaces. After the gas tank leaks, the methane sensor 7 in the small space corresponding to the leaking part of the gas tank detects the methane component, and the corresponding explosion-proof solenoid valve 11 opens, and the sealing filling box 4 fills the space in the jacket 1 with polyurethane foam adhesive, and the high-pressure inert gas tank 5 fills inert gas into the sealing filling box 4 to prevent the pressure in the sealing filling box 4 from decreasing. After the polyurethane foam adhesive is cured, the leaking part of the gas tank is sealed.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An anti-leakage device for a gas tank in an LNG filling station, comprising: The jacket (1) and the gas storage tank body (8) are characterized in that the gas storage tank body (8) is located in the middle of the jacket (1), a plurality of partitions (9) are fixedly connected to the inner wall of the jacket (1), and the gas storage tank body (8) passes through the middle of the jacket (1) and is fixedly connected to the jacket (1), an emptying port (6) is installed at the upper end of the gas storage tank body (8), and the emptying port (6) passes through the jacket (1) upward, one end of the jacket (1) is fixedly connected to a sealed filling box (4), the upper end of the sealed filling box (4) is fixedly connected to a high-pressure inert gas tank (5), and the sealed filling box (4) is communicated with the high-pressure inert gas tank (5), and the sealed filling box (4) is connected to the high-pressure inert gas tank (5). ) is fixedly connected to the side end of two delivery pipes (2), and the other end of the delivery pipe (2) passes through the jacket (1), the side end of the delivery pipe (2) is installed with a filling pipe (10), and the filling pipe (10) is installed with an explosion-proof electromagnetic valve (11), the outer end of the jacket (1) is fixedly connected to a plurality of methane sensors (7) at equal intervals, and the detection end of the methane sensor (7) is located between the jacket (1) and the gas tank body (8), the partition (9) divides the internal space of the jacket (1) into a plurality of methane sensors (7), and the methane sensors (7) are respectively located in the spaces separated by the partition (9) in the jacket (1), and the bottom of the jacket (1) is fixedly connected to a base (3).

2. The LNG filling station gas tank anti-leakage device according to claim 1 is characterized in that: The filling pipes (10) are respectively located in the spaces separated by the partitions (9) in the jacket (1).

3. The LNG filling station gas tank anti-leakage device according to claim 1 is characterized in that: The sealing filling box (4) is provided with polyurethane foam adhesive.

4. The LNG filling station gas tank anti-leakage device according to claim 1, characterized in that: The delivery pipe (2) and the sealed filling box (4) are connected via a flange.

5. The LNG filling station gas tank anti-leakage device according to claim 1, characterized in that: The outer end of the delivery pipe (2) is covered with a sealing rubber sleeve, and the sealing rubber sleeve is located between the delivery pipe (2) and the partition plate (9).

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