Leakage-proof LNG (Liquefied Natural Gas) tank
By designing a pressure relief mechanism in the LNG gas tank, excessive air pressure is discharged using the pressure relief hole, the leakage problem caused by the increase in air pressure is solved, and the safety and sealing of the gas tank are improved.
Patent Information
- Application Number
- CN202422151039.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-03
AI Technical Summary
During driving, the internal air pressure increases due to bumps and external high temperatures, which may cause damage to the weak areas and natural gas leakage.
A leak-proof LNG gas tank is designed, and a pressure relief mechanism is adopted, including a sealing plug, a movable rod, a connecting plate, a fixing rod and a spring. Excessive air pressure is discharged through the pressure relief hole to avoid leakage.
It effectively avoids damage and leakage caused by excessive air pressure, ensuring the safety and sealing of the gas tank.
Smart Images
Figure CN223004812U_ABST
Abstract
Description
Technical Field
[0001] The utility model mainly relates to the technical field of LNG gas tanks, and in particular to a leak-proof LNG gas tank. Background Art
[0002] LNG gas tanks are high-vacuum insulated containers used to store liquefied natural gas. When installed on a vehicle, they can enter the gasifier through a pipeline system to be heated and vaporized, converted into gaseous natural gas, and then supplied to the engine for use. Natural gas is a clean energy source and produces fewer pollutants after combustion, which is beneficial to reducing air pollution and greenhouse gas emissions. The price is relatively stable and lower than traditional fuel, which can reduce operating costs and improve economic benefits.
[0003] When the LNG gas tank is installed on a vehicle, it will shake with the vehicle during driving and is easily affected by external high temperatures, which will cause the internal pressure of the LNG gas tank to increase and stretch the weak points, causing natural gas leakage. Utility Model Content
[0004] 1. Technical problems to be solved by the utility model:
[0005] The utility model provides a leakproof LNG gas tank, which is used to solve the technical problems existing in the above-mentioned background technology.
[0006] 2. Technical solution:
[0007] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is: a leak-proof LNG gas tank, comprising a gas tank top cover, a gas tank bottom cover and a gas tank body welded therebetween;
[0008] A pressure relief mechanism is arranged on the gas tank top cover, and the pressure relief mechanism includes a sealing plug, which is slidably connected to a first slide groove opened on the inner side of the gas tank top cover, a pressure relief hole connected to the outside is opened on the side wall of the first slide groove, and a second slide groove is opened on the top, and a movable rod is slidably installed in the second slide groove, one end of the movable rod is fixedly connected to the top of the sealing plug, and the other end extends to the top of the gas tank top cover and is provided with a connecting plate, the connecting plate is slidably connected to the fixed rod set on the top of the gas tank top cover, and a spring is provided on the fixed rod.
[0009] Furthermore, a thread is provided on the outer side of the fixing rod, and a thread sleeve is matched and connected to the thread. One end of the spring abuts against the connecting plate, and the other end abuts against the thread sleeve.
[0010] Furthermore, the gas tank body includes an inner layer and an outer layer which are coaxially distributed, and the outer side of the inner layer is wrapped with thermal insulation paper of a predetermined thickness.
[0011] Furthermore, the gap between the inner layer and the outer layer is close to a vacuum environment.
[0012] Furthermore, a protective plate is welded to the outer side of the outer layer.
[0013] 3. Beneficial effects:
[0014] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects: When the internal air pressure of the LNG gas tank is too high, the air pressure will push the sealing plug to slide upward in the first chute until it separates from the pressure relief hole, and then the air pressure can be discharged to the outside through the pressure relief hole, avoiding damage and leakage caused by excessive air pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;
[0016] Figure 2 is a sectional structural schematic diagram of the present utility model;
[0017] Figure 3 is a structural schematic diagram of the gas tank body of the present utility model;
[0018] Figure 4 is of the present utility model Figure 1 is an enlarged structural schematic diagram of part A in
[0019] Reference numerals:
[0020] 1. Gas tank top cover; 11. First chute; 12. Pressure relief hole; 13. Second chute; 2. Gas tank bottom cover; 3. Gas tank body; 31. Inner layer; 32. Outer layer; 33. Heat insulation paper; 4. Pressure relief mechanism; 41. Sealing plug; 42. Moving rod; 43. Connecting plate; 44. Fixed rod; 45. Spring; 46. Thread; 47. Thread sleeve; 5. Protective plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] In order to facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.
[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.
[0024] In the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", "provided with", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Embodiment
[0025] Referring to the attached Figures 1-4 , a leak-proof LNG gas tank, comprising a gas tank top cover 1, a gas tank bottom cover 2, and a gas tank body 3 welded between the two;
[0026] A pressure relief mechanism 4 is provided on the gas tank top cover 1. The pressure relief mechanism 4 includes a sealing plug 41. The sealing plug 41 is slidably connected to a first chute 11 opened on the inner side of the gas tank top cover 1. A pressure relief hole 12 communicating with the outside is opened on the side wall of the first chute 11, and a second chute 13 is opened at the top. A movable rod 42 is slidably installed in the second chute 13. One end of the movable rod 42 is fixedly connected to the top of the sealing plug 41, and the other end extends to the top of the gas tank top cover 1 and is provided with a connecting plate 43. The connecting plate 43 is slidably connected to a fixing rod 44 provided on the top of the gas tank top cover 1, and a spring 45 is provided on the fixing rod 44.
[0027] In this embodiment, when the internal air pressure of the LNG gas tank is too high, the air pressure will push the sealing plug 41 to slide upward in the first chute 11. The movable rod 42 will slide synchronously in the second chute 13, and the connecting plate 43 will also slide synchronously on the fixed rod 44 and compress the spring 45. When the sealing plug 41 is separated from the pressure relief hole 12, the air pressure can be discharged to the outside through the pressure relief hole 12, avoiding damage and leakage caused by excessive air pressure. When the internal air pressure of the LNG gas tank is normal, the elastic force of the spring 45 will drive the sealing plug 41 to recover and block the pressure relief hole 12 again to seal the LNG gas tank.
[0028] It should be noted that other associated accessories are also assembled on the gas tank top cover 1, the gas tank bottom cover 2, and the gas tank body 3. This is common knowledge in the art and will not be elaborated in detail here.
[0029] A thread 46 is provided on the outside of the fixed rod 44, and a threaded sleeve 47 is connected in a matching manner on the thread 46. One end of the spring 45 abuts against the connecting plate 43, and the other end abuts against the threaded sleeve 47.
[0030] In this embodiment, after the spring 45 is used for a long time, the elastic effect weakens. At this time, by rotating the threaded sleeve 47 connected in a matching manner on the thread 46, the spring 45 can be compressed to ensure that the elasticity of the spring 45 meets the use requirements. Similarly, after the threaded sleeve 47 is removed, the spring 45 can be replaced.
[0031] The gas tank body 3 includes an inner layer 31 and an outer layer 32 distributed coaxially. A heat insulation paper 33 with a predetermined thickness is wound outside the inner layer 31 to reduce the heat transfer effect and achieve the effect of heat preservation and insulation.
[0032] The gap between the inner layer 31 and the outer layer 32 is close to a vacuum environment, which can further isolate heat transfer and improve the heat preservation and insulation effect.
[0033] A protective plate 5 is welded on the outside of the outer layer 32 for bump protection.
[0034] The above-described embodiments only represent a certain implementation manner of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.
[0035] It should be noted that the above content belongs to the technical cognition scope of the inventor. Due to the vast and complex technical content in this field, the above content of this application does not necessarily constitute the prior art.
Claims
1. A leakproof LNG gas tank, characterized in that: It comprises a gas tank top cover (1), a gas tank bottom cover (2), and a gas tank body (3) welded therebetween; The gas tank cover (1) is provided with a pressure relief mechanism (4), the pressure relief mechanism (4) comprising a sealing plug (41), the sealing plug (41) being slidably connected to a first slide groove (11) provided on the inner side of the gas tank cover (1), the first slide groove (11) having a side wall provided with a pressure relief hole (12) communicating with the outside, and a second slide groove (13) provided on the top, a movable rod (42) being slidably installed in the second slide groove (13), one end of the movable rod (42) being fixedly connected to the top of the sealing plug (41), and the other end extending to the top of the gas tank cover (1) and provided with a connecting plate (43), the connecting plate (43) being slidably connected to a fixing rod (44) provided on the top of the gas tank cover (1), and a spring (45) being provided on the fixing rod (44).
2. A leakproof LNG gas tank according to claim 1, characterized in that: The fixing rod (44) is provided with a thread (46) on the outside, and a thread sleeve (47) is matched and connected to the thread (46); one end of the spring (45) abuts against the connecting plate (43), and the other end abuts against the thread sleeve (47).
3. A leakproof LNG gas tank according to claim 1, characterized in that: The gas cylinder body (3) comprises an inner layer (31) and an outer layer (32) which are coaxially distributed, and a heat insulation paper (33) of a predetermined thickness is wound around the outer side of the inner layer (31).
4. A leakproof LNG gas tank according to claim 3, characterized in that: The gap between the inner layer (31) and the outer layer (32) is close to a vacuum environment.
5. A leakproof LNG gas tank according to claim 3, characterized in that: A protective plate (5) is welded to the outer side of the outer layer (32).