Small LNG (Liquefied Natural Gas) storage device with low-temperature environment adaptability protection function

Abstract

The utility model relates to the technical field of natural gas storage, and discloses a small LNG (Liquefied Natural Gas) storage device with a low-temperature environment adaptability protection function, which comprises a natural gas storage tank and a gas inlet, the gas inlet is arranged at the top of the natural gas storage tank, and the top of the natural gas storage tank is provided with a sealing detection assembly for detecting the internal sealing performance of the gas storage tank. Through the arrangement of the sealing detection assembly, the purpose of automatically detecting the sealing condition of the natural gas storage tank is achieved, automatic detection is achieved, the problem can be found in time at the initial stage of gas leakage, the risk of safety accidents such as explosion and fire caused by natural gas leakage is reduced, and the safety of the natural gas storage tank is improved. And manual frequent complex detection operation is not needed, the labor cost and the detection difficulty are reduced, meanwhile, a worker can be reminded in time to check and maintain the sealing condition of the storage tank, further deterioration of the leakage condition is avoided, and waste of natural gas is reduced.

Description

Technical Field

[0001] This utility model relates to the field of natural gas storage technology, specifically a small LNG storage device with low-temperature environment adaptability protection function. Background Technology

[0002] A liquefied natural gas (LNG) storage unit is a device specifically designed for storing LNG. It is characterized by its small size, ability to effectively store LNG in cryogenic environments, and a range of protective functions to ensure the safe storage and stable condition of LNG.

[0003] Traditional natural gas storage tanks on the market have many drawbacks. For example, in terms of sealing detection, traditional natural gas storage tanks mostly rely on manual periodic inspections or external professional testing equipment. Manual inspections are limited by the work schedule and professional level of the inspectors, and there are obvious time intervals, making it difficult to detect problems as soon as a leak occurs. Traditional external testing equipment is often complex and expensive, requiring professional technicians to operate and maintain it. In practical applications, due to the cumbersome operation process and relatively long testing cycle, it cannot achieve real-time and continuous monitoring of the sealing condition of the storage tank.

[0004] Furthermore, traditional natural gas storage tanks lack intuitive and timely early warning mechanisms when small leaks occur in the seal. Often, the leak is only discovered when it reaches a certain level and produces obvious odors, sounds, or pressure changes. During this period, the continuous leakage of natural gas not only causes a large waste of energy, but also affects the normal storage function of the storage tank due to pressure drop, leading to unstable or interrupted gas supply. This seriously disrupts industrial production and residential life that rely on natural gas supply, causing many inconveniences and losses to the normal operation of the social economy.

[0005] Secondly, in terms of sealing operations, the sealing and opening process of traditional natural gas storage tanks is complex and cumbersome. For example, when opening or closing the valve, it is necessary to manually rotate the valve handwheel many times precisely, and adjust the operating force and amplitude in a timely manner according to the pressure gauge. This not only greatly increases the workload and difficulty of the operators, but also reduces the overall work efficiency. In scenarios of emergency gas use or frequent changes in gas storage demand, this inefficient operating mode is particularly unfavorable.

[0006] To address this, a small LNG storage device with low-temperature environment adaptability protection is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a small LNG storage device with low-temperature environment adaptability protection function to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a small LNG storage device with low-temperature environment adaptability protection function, including a natural gas storage tank and an air inlet. The air inlet is located at the top of the natural gas storage tank. A sealing detection component for detecting the internal sealing of the detector is provided at the top of the natural gas storage tank. An automatic sealing component for automatic sealing after liquid storage is provided on the outside of the air inlet.

[0009] Preferably, the sealing detection assembly includes a detection tube, which is fixedly connected to the top of the natural gas storage tank. A positioning ring is fixedly connected inside the detection tube, and a double-layer slide rod is slidably connected inside the detection tube.

[0010] Preferably, the sealing detection assembly further includes a first reset spring, one end of which is fixedly connected to the inside of the positioning ring, and the other end of which is fixedly connected to the bottom of the double-layer slide rod. A warning light is fixedly connected to the top of the detection tube.

[0011] Preferably, the automatic sealing assembly includes a water inlet plate, which is fixedly connected to the end of the air inlet away from the natural gas storage tank. A sealing plug is slidably connected inside the water inlet plate, and a second return spring is fixedly connected between the sealing plug and the water inlet plate.

[0012] Preferably, the automatic sealing assembly further includes a leak-proof tube, which is slidably connected to the outer wall of the air inlet, and an L-shaped abutment rod assembly is fixedly connected inside the leak-proof tube.

[0013] Preferably, the double-layer slide rod is slidably connected inside the positioning ring, and a conductive sheet is provided on the top of the double-layer slide rod, and the conductive sheet is electrically connected to the power supply used by the device.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By setting up a sealing detection component, when a gas leak occurs in the natural gas storage tank, the internal gas pressure is less than the tension of the first return spring on the double-layer slide rod. This causes the conductive plate at the top of the double-layer slide rod to contact the warning light, illuminating the light. This achieves the purpose of automatically detecting the sealing condition of the natural gas storage tank. Compared with traditional natural gas storage tanks, which rely on regular manual inspections or complex external testing equipment for sealing detection, the above structure triggers the warning light by comparing the gas pressure with the tension of the first return spring on the double-layer slide rod. When a leak occurs in the storage tank, the gas pressure decreases, and the double-layer slide rod moves under the spring tension, causing the top conductive plate to contact the warning light and illuminate it. This achieves automatic detection, enabling timely detection of problems in the early stages of a leak, shortening the leak detection time, reducing the risk of safety accidents such as explosions and fires caused by natural gas leaks, and eliminating the need for frequent and complex manual inspections, thus reducing labor costs and detection difficulty. At the same time, it can promptly remind staff to check and repair the sealing condition of the storage tank, preventing the leak from worsening and reducing natural gas waste.

[0016] 2. By setting up an automatic sealing component, after the natural gas storage tank is filled with gas, the second return spring automatically pulls the sealing plug against the water inlet plate, sealing the natural gas storage tank. When the natural gas storage tank is filled again, the L-shaped contact rod assembly inside the leak-proof pipe only needs to contact the sealing plug and water inlet plate to release the seal and allow for normal gas storage. Compared to the complex sealing and opening operations of traditional natural gas storage tanks, the above structure, which automatically pulls the sealing plug against the water inlet plate using the second return spring, is simple and direct. It automatically functions after gas storage is completed, requiring no additional manual intervention to activate the sealing mechanism, thus improving the operational convenience of the natural gas storage tank in daily use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram showing the positional relationship between the sealing detection component and the automatic sealing component of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0020] Figure 4 This utility model Figure 2 Enlarged view of the structure at point B in the middle.

[0021] Attached reference numerals: 11. Natural gas storage tank; 12. Gas inlet;

[0022] The sealing detection assembly includes: 21. Detection tube; 22. Positioning ring; 23. Double-layer slide rod; 24. First return spring; 25. Warning light;

[0023] The automatic sealing assembly includes: 31, water inlet plate; 32, sealing plug; 33, second return spring; 34, leak-proof pipe; 35, L-shaped abutment rod assembly. Detailed Implementation

[0024] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 4 One embodiment of this utility model is a small LNG storage device with low temperature environment adaptability protection function, including a natural gas storage tank 11 and an air inlet 12. The air inlet 12 is opened on the top of the natural gas storage tank 11. A sealing detection component for the internal sealing of the detector is provided on the top of the natural gas storage tank 11. An automatic sealing component for automatic sealing after liquid storage is provided on the outside of the air inlet 12.

[0026] The sealing detection assembly includes a detection tube 21, which is fixedly connected to the top of the natural gas storage tank 11. A positioning ring 22 is fixedly connected inside the detection tube 21, and a double-layer slide rod 23 is slidably connected inside the detection tube 21.

[0027] The sealing detection assembly also includes a first reset spring 24, one end of which is fixedly connected to the inside of the positioning ring 22, and the other end of which is fixedly connected to the bottom of the double-layer slide bar 23. A warning light 25 is fixedly connected to the top of the detection tube 21.

[0028] The automatic sealing assembly includes a water inlet plate 31, which is fixedly connected to the end of the air inlet 12 away from the natural gas storage tank 11. A sealing plug 32 is slidably connected inside the water inlet plate 31, and a second return spring 33 is fixedly connected between the sealing plug 32 and the water inlet plate 31.

[0029] The automatic sealing assembly also includes a leak-proof tube 34, which is slidably connected to the outer wall of the air inlet 12, and an L-shaped abutment rod assembly 35 is fixedly connected inside the leak-proof tube 34.

[0030] The double-layer slide bar 23 is slidably connected to the inside of the positioning ring 22. A conductive sheet is provided on the top of the double-layer slide bar 23, and the conductive sheet is electrically connected to the power supply of the equipment. When the conductive sheet on the top of the double-layer slide bar 23 comes into contact with the warning light 25, the warning light 25 will be powered on and lit.

[0031] Working principle: In the initial state, the double-layer slide bar 23 does not contact the warning light 25, the first return spring 24 is stretched, the sealing plug 32 does not contact the water inlet plate 31, the sealing plug 32 is stretched, and the L-shaped contact rod group 35 contacts the sealing plug 32.

[0032] When a gas leak occurs inside the natural gas storage tank 11 during operation, the gas pressure inside the natural gas storage tank 11 is less than the pulling force of the first reset spring 24 on the double-layer slide rod 23. At this time, the double-layer slide rod 23 will elastically contract and drive the double-layer slide rod 23 to rise along the inside of the detection tube 21 and the positioning ring 22.

[0033] Because the top of the double-layer slide bar 23 is equipped with a conductive plate, and the conductive plate is electrically connected to the power supply of the equipment, the warning light 25 will be powered on and illuminated when the conductive plate at the top of the double-layer slide bar 23 comes into contact with the warning light 25. This achieves automatic detection, enabling timely detection of problems in the early stages of gas leakage, shortening the time to gas leakage detection, reducing the risk of safety accidents such as explosions and fires caused by natural gas leaks, and eliminating the need for frequent and complex manual inspection operations, thus reducing labor costs and inspection difficulty. At the same time, it can promptly remind staff to check and repair the sealing of the natural gas storage tank 11, preventing the leakage from worsening and reducing the waste of natural gas.

[0034] When it is necessary to store liquid inside the natural gas storage tank 11, the staff first needs to connect the leak-proof pipe 34 along the outer wall of the gas inlet 12. At this time, the leak-proof pipe 34 will drive the L-shaped abutment rod group 35 to abut against the sealing plug 32, causing the sealing plug 32 to move away from the water inlet plate 31. At the same time, the sealing plug 32 gradually stretches the second return spring 33, thereby creating a gap between the sealing plug 32 and the water inlet plate 31. Then, the staff can discharge the natural gas liquid into the interior of the natural gas storage tank 11 through the leak-proof pipe 34 and the water inlet plate 31.

[0035] After the natural gas storage tank 11 has finished storing liquid, the operator pulls out the leak-proof pipe 34 away from the gas inlet 12. Then, the leak-proof pipe 34 drives the L-shaped contact rod assembly 35 to move away from the sealing plug 32, so that the second return spring 33 pulls the sealing plug 32 to abut against the water inlet plate 31, thereby sealing the natural gas storage tank 11. Compared with the complicated operation of sealing and opening of the traditional natural gas storage tank 11, the above structure achieves sealing by automatically pulling the sealing plug 32 to abut against the water inlet plate 31 through the second return spring 33. The structure is simple and direct, and it automatically plays its role after the gas storage is completed. No additional manual intervention is required to start the sealing mechanism, which improves the operational convenience of the natural gas storage tank 11 in daily use.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small LNG storage device with low-temperature environment adaptability protection function, comprising a natural gas storage tank (11) and an air inlet (12), wherein the air inlet (12) is located on the top of the natural gas storage tank (11), characterized in that: The top of the natural gas storage tank (11) is provided with a sealing detection component for the internal sealing of the detector, and the outside of the air inlet (12) is provided with an automatic sealing component for automatic sealing after liquid storage.

2. A small LNG storage device with low-temperature environment adaptability protection function according to claim 1, characterized in that: The sealing detection assembly includes a detection tube (21), which is fixedly connected to the top of the natural gas storage tank (11). A positioning ring (22) is fixedly connected inside the detection tube (21), and a double-layer slide rod (23) is slidably connected inside the detection tube (21).

3. A small LNG storage device with low-temperature environment adaptability protection function according to claim 2, characterized in that: The sealing detection assembly also includes a first reset spring (24), one end of which is fixedly connected to the inside of the positioning ring (22), and the other end of which is fixedly connected to the bottom of the double-layer slide bar (23). A warning light (25) is fixedly connected to the top of the detection tube (21).

4. A small LNG storage device with low-temperature environment adaptability protection function according to claim 1, characterized in that: The automatic sealing assembly includes a water inlet plate (31), which is fixedly connected to the end of the air inlet (12) away from the natural gas storage tank (11). A sealing plug (32) is slidably connected inside the water inlet plate (31), and a second return spring (33) is fixedly connected between the sealing plug (32) and the water inlet plate (31).

5. A small LNG storage device with low-temperature environment adaptability protection function according to claim 4, characterized in that: The automatic sealing assembly also includes a leak-proof tube (34), which is slidably connected to the outer wall of the air inlet (12), and an L-shaped abutment rod assembly (35) is fixedly connected inside the leak-proof tube (34).

6. A small LNG storage device with low-temperature environment adaptability protection function according to claim 2, characterized in that: The double-layer slide rod (23) is slidably connected to the inside of the positioning ring (22). A conductive sheet is provided on the top of the double-layer slide rod (23), and the conductive sheet has an electrical connection with the power supply used by the device.

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