Composite material buffer tank for LNG (Liquefied Natural Gas) automobile

Abstract

The utility model is applicable to the technical field of buffer tanks for LNG (Liquefied Natural Gas) automobiles, in particular to a composite buffer tank for an LNG automobile, which comprises an upper buffer tank shell and a lower buffer tank shell, and the end surfaces of the upper buffer tank shell and the lower buffer tank shell are fixedly connected together in a welding manner; a first spherical seal head and a second spherical seal head are respectively arranged on the end surfaces, far away from each other, of the upper buffer tank shell and the lower buffer tank shell. According to the LNG buffer tank, the buffer tank upper shell, the buffer tank lower shell, the first spherical end socket and the second spherical end socket are made of plastic materials, so that the lightweight degree of the LNG buffer tank can be greatly improved; and the outer sides of the buffer tank upper shell, the buffer tank lower shell, the first spherical end socket and the second spherical end socket are wound with fiber filaments made of glass fibers, carbon fibers or basalt fibers, so that the overall strength of the LNG buffer tank can be fully guaranteed on the premise that the light weight of the LNG buffer tank is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of buffer tanks for LNG vehicles, in particular to a composite material buffer tank for LNG vehicles. Background Art

[0002] With the continuous increase in energy demand and the enhancement of environmental protection awareness, liquefied natural gas (LNG), as a clean energy, is increasingly being used in the field of automotive fuel. LNG vehicles have significant advantages in reducing exhaust emissions and improving fuel efficiency. However, the safety and lightweight issues in the storage and transportation of LNG have always been the focus and difficulty of related technical research.

[0003] At present, LNG vehicle buffer tanks are mainly made of metal materials. Although metal materials have high strength, they also have some obvious defects. First, the weight of metal materials is relatively large, which increases the overall weight of the vehicle, thereby affecting the fuel economy and driving performance of the vehicle. Although the use of composite materials such as plastics in LNG vehicle buffer tanks can significantly improve the degree of lightweight, it also faces the problem of difficulty in ensuring overall strength. In this regard, the utility model provides a composite material buffer tank for LNG vehicles to solve the above technical problems. Utility Model Content

[0004] The purpose of the embodiment of the utility model is to provide a composite material buffer tank for LNG vehicles, aiming to solve the technical problems mentioned in the background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A composite material buffer tank for an LNG vehicle, comprising a buffer tank upper shell and a buffer tank lower shell, wherein the end surfaces of the buffer tank upper shell and the buffer tank lower shell are fixedly connected together by welding;

[0007] The end surfaces of the upper shell of the buffer tank and the lower shell of the buffer tank that are away from each other are respectively provided with a first spherical head and a second spherical head, and the surface of the first spherical head is provided with a first boss, and the surface of the second spherical head is provided with a second boss, the surface of the first boss is provided with an air inlet hole, and the surface of the second boss is provided with an air outlet hole;

[0008] The upper shell of the buffer tank and the first spherical head are provided with a plurality of first head reinforcement ribs, and the lower shell of the buffer tank and the second spherical head are provided with a plurality of second head reinforcement ribs;

[0009] The buffer tank upper shell, buffer tank lower shell, first spherical head and second spherical head are all components made of plastic material.

[0010] Furthermore, the plastic materials used to prepare the upper shell of the buffer tank, the lower shell of the buffer tank, the first spherical head and the second spherical head are specifically: polyurethane (PU), polyamide (PA), polyoxymethylene (POM), polypropylene (PP), polyethylene (PE), polysulfone (PSU), polyetherimide (PEI), polyamideimide (PAI), polyetheretherketone (PEEK), polyvinylidene fluoride (PVDF), polyphenylene ether (PPO), polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET) or polychlorotrifluoroethylene (PCTFE).

[0011] Furthermore, a plurality of mounting feet are disposed on the outer sides of the buffer tank upper shell and the buffer tank lower shell, and mounting grooves are formed on the end faces of the mounting feet, and embedded nuts are disposed inside the mounting grooves.

[0012] Furthermore, a first hot-plug nut is disposed inside the air inlet, and a third hot-plug nut is disposed inside the air outlet.

[0013] Furthermore, a mounting hole is provided on the surface of the first boss, and a second hot-plug nut is arranged inside the mounting hole. An annular groove is provided on the outer surfaces of the second hot-plug nut, the first hot-plug nut and the third hot-plug nut, and a sealing ring is provided inside the annular groove.

[0014] Furthermore, the outer sides of the buffer tank upper shell, the buffer tank lower shell, the first spherical head and the second spherical head are collectively sleeved with an outer protective cover shell, and the outer protective cover shell is made of glass fiber, carbon fiber or basalt fiber.

[0015] The utility model provides a composite material buffer tank for LNG vehicles, which has the following beneficial effects:

[0016] By setting the buffer tank upper shell, buffer tank lower shell, first spherical head and second spherical head to plastic material, the lightweight degree of the LNG buffer tank can be greatly improved, and by winding fiber filaments made of glass fiber, carbon fiber or basalt fiber material on the outer side of the buffer tank upper shell, buffer tank lower shell, first spherical head and second spherical head, the overall strength of the LNG buffer tank can be fully guaranteed without affecting the lightweight of the LNG buffer tank. In addition, by evenly arranging a plurality of first head reinforcement ribs and second head reinforcement ribs inside the buffer tank upper shell and the buffer tank lower shell respectively, the strength performance of the buffer tank upper shell and the buffer tank lower shell can be greatly improved, thereby improving the practicality of the composite material buffer tank for LNG vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a composite buffer tank for LNG vehicles.

[0018] Figure 2 This is a structural schematic diagram of a composite buffer tank for LNG vehicles in which the buffer tank upper shell and the buffer tank lower shell are in a separated state.

[0019] Figure 3 The present invention is a schematic structural diagram of a buffer tank upper shell, a buffer tank lower shell, a first spherical head and a second spherical head in a composite buffer tank for LNG vehicles when they are covered with an outer protective cover.

[0020] Figure 4 This is a schematic diagram of the structure of an outer protective cover in a composite buffer tank for LNG vehicles.

[0021] Figure 5 This is a schematic diagram of the explosion structure of a buffer tank upper shell and various components mounted on the buffer tank upper shell in a composite buffer tank for LNG vehicles.

[0022] Figure 6 This is a schematic diagram of the explosion structure of a buffer tank lower shell and various components mounted on the buffer tank lower shell in a composite buffer tank for LNG vehicles.

[0023] Figure 7 The present invention is a schematic structural diagram of a buffer tank upper shell and a first head reinforcement rib inside the buffer tank upper shell in a composite buffer tank for LNG vehicles.

[0024] Figure 8 The present invention is a schematic diagram of the structure of a buffer tank lower shell and a second head reinforcement rib inside the buffer tank lower shell in a composite buffer tank for LNG vehicles.

[0025] In the figure: 1. upper shell of buffer tank; 2. lower shell of buffer tank; 3. first boss; 4. air inlet; 5. mounting hole; 6. first spherical head; 7. mounting foot; 8. second spherical head; 9. second boss; 10. outer protective cover; 11. first hot-plug nut; 12. sealing ring; 13. second hot-plug nut; 14. mounting groove; 15. embedded nut; 16. air outlet; 17. third hot-plug nut; 18. first head reinforcement rib; 19. second head reinforcement rib. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0028] like Figure 1-Figure 8 As shown, an embodiment of the utility model provides a composite material buffer tank for LNG vehicles, comprising a buffer tank upper shell 1 and a buffer tank lower shell 2, and the end surfaces of the buffer tank upper shell 1 and the buffer tank lower shell 2 are fixedly connected together by welding;

[0029] The end surfaces of the buffer tank upper shell 1 and the buffer tank lower shell 2 that are away from each other are respectively provided with a first spherical head 6 and a second spherical head 8, and the surface of the first spherical head 6 is provided with a first boss 3, and the surface of the second spherical head 8 is provided with a second boss 9, the surface of the first boss 3 is provided with an air inlet 4, and the surface of the second boss 9 is provided with an air outlet 16, and the buffer tank upper shell 1, the first spherical head 6 and the first boss 3, and the buffer tank lower shell 2, the second spherical head 8 and the second boss 9 are all integrally injection molded;

[0030] The outer sides of the buffer tank upper shell 1, the buffer tank lower shell 2, the first spherical head 6 and the second spherical head 8 are jointly sleeved with an outer protective cover shell 10, and the outer protective cover shell 10 is made of glass fiber, carbon fiber or basalt fiber, that is, after the buffer tank upper shell 1 and the buffer tank lower shell 2 are welded together, the fiber filaments made of glass fiber, carbon fiber or basalt fiber are evenly and fully wound around the outer sides of the buffer tank upper shell 1, the first spherical head 6, the buffer tank lower shell 2 and the second spherical head 8 to form an outer protective cover shell 10 for protecting the buffer tank upper shell 1 and the buffer tank lower shell 2.

[0031] A plurality of first head reinforcement ribs 18 are provided inside the buffer tank upper shell 1 and the first spherical head 6 , and a plurality of second head reinforcement ribs 19 are provided inside the buffer tank lower shell 2 and the second spherical head 8 .

[0032] By setting the first spherical head 6 and the second spherical head 8 to be spherical, the stress distribution of the outer protective cover shell 10 distributed on the first spherical head 6 or the second spherical head 8 can be made more uniform, and by uniformly distributing a plurality of first head reinforcement ribs 18 inside the upper shell 1 of the buffer tank and uniformly distributing a plurality of second head reinforcement ribs 19 inside the lower shell 2 of the buffer tank, the strength of the first spherical head 6 and the second spherical head 8 can be improved, and the outer layer is wound by a combination of annular winding and spiral winding so that it can withstand a pressure above 2.86 MPa.

[0033] The upper shell 1 of the buffer tank, the lower shell 2 of the buffer tank, the first spherical head 6 and the second spherical head 8 are all components made of plastic materials. Further, the plastic materials used to prepare the upper shell 1 of the buffer tank, the lower shell 2 of the buffer tank, the first spherical head 6 and the second spherical head 8 are specifically: polyurethane (PU), polyamide (PA), polyoxymethylene (POM), polypropylene (PP), polyethylene (PE), polysulfone (PSU), polyetherimide (PEI), polyamideimide (PAI), polyetheretherketone (PEEK), polyvinylidene fluoride (PVDF), polyphenylene oxide (PPO), polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET) or polychlorotrifluoroethylene (PCTFE);

[0034] By setting the buffer tank upper shell 1, the buffer tank lower shell 2, the first spherical head 6 and the second spherical head 8 to be plastic materials, the lightweight degree of the LNG buffer tank can be greatly improved, and by winding fiber filaments made of glass fiber, carbon fiber or basalt fiber on the outer sides of the buffer tank upper shell 1, the buffer tank lower shell 2, the first spherical head 6 and the second spherical head 8, the overall strength of the LNG buffer tank can be fully guaranteed without affecting the lightweight of the LNG buffer tank, thereby improving the practicality of the composite material buffer tank for LNG vehicles;

[0035] It can be understood that since the buffer tank upper shell 1 and the first spherical head 6 as well as the buffer tank lower shell 2 and the second spherical head 8 are all integrally formed structures, when preparing the present LNG buffer tank, it is only necessary to weld the end faces of the buffer tank upper shell 1 and the buffer tank lower shell 2 together. Compared with the prior art, this preparation method reduces the number of welded end faces, thereby improving the cleanliness of the interior of the buffer tank, reducing the workload, and improving the production efficiency of the LNG buffer tank.

[0036] In the present embodiment, a plurality of mounting feet 7 are provided on the outer sides of the buffer tank upper shell 1 and the buffer tank lower shell 2, and mounting grooves 14 are provided on the end faces of the mounting feet 7, and embedded nuts 15 are provided inside the mounting grooves 14. By providing the mounting feet 7, the buffer tank upper shell 1 or the buffer tank lower shell 2 can be conveniently installed on the vehicle body; the mounting feet 7 and the buffer tank upper shell 1 are integrally injection molded, and when the mounting feet 7 are injection molded, the embedded nuts 15 are pre-embedded inside the mounting feet 7. By pre-embedded nuts 15, the mounting feet 7 can be conveniently fixed or removed on the vehicle body.

[0037] In this embodiment, a first hot-plug nut 11 is disposed inside the air inlet 4, a third hot-plug nut 17 is disposed inside the air outlet 16, a mounting hole 5 is provided on the surface of the first boss 3, and a second hot-plug nut 13 is disposed inside the mounting hole 5, and an annular groove is disposed on the outer surfaces of the second hot-plug nut 13, the first hot-plug nut 11 and the third hot-plug nut 17, and a sealing ring 12 is sleeved inside the annular groove;

[0038] The interior of the mounting hole 5 is used to install the pressure sensor, and the first hot-plug nut 11, the second hot-plug nut 13 and the third hot-plug nut 17 are all firmly installed in the air inlet 4, the mounting hole 5 and the air outlet 16 by adopting the hot-plug process. By setting the first hot-plug nut 11 and the third hot-plug nut 17, the buffer tank can be conveniently connected to the air inlet interface and the air outlet interface of the outside, and by setting the second hot-plug nut 13, the pressure sensor can be conveniently installed on the first boss 3;

[0039] By arranging two sealing rings 12 on the outer sides of the first hot-plug nut 11 , the second hot-plug nut 13 , and the third hot-plug nut 17 , the sealing performance between the first hot-plug nut 11 , the second hot-plug nut 13 , and the third hot-plug nut 17 and the first boss 3 or the second boss 9 can be ensured.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite material buffer tank for an LNG vehicle, comprising a buffer tank upper shell (1) and a buffer tank lower shell (2), characterized in that: The end surfaces of the buffer tank upper shell (1) and the buffer tank lower shell (2) are fixedly connected together by welding; The end surfaces of the buffer tank upper shell (1) and the buffer tank lower shell (2) which are away from each other are respectively provided with a first spherical head (6) and a second spherical head (8), and the surface of the first spherical head (6) is provided with a first boss (3), and the surface of the second spherical head (8) is provided with a second boss (9), the surface of the first boss (3) is provided with an air inlet hole (4), and the surface of the second boss (9) is provided with an air outlet hole (16); A plurality of first head reinforcement ribs (18) are provided inside the upper shell (1) of the buffer tank and the first spherical head (6), and a plurality of second head reinforcement ribs (19) are provided inside the lower shell (2) of the buffer tank and the second spherical head (8); The buffer tank upper shell (1), the buffer tank lower shell (2), the first spherical head (6) and the second spherical head (8) are all components made of plastic material.

2. The composite material buffer tank for LNG vehicles according to claim 1, characterized in that: The plastic material used to prepare the buffer tank upper shell (1), the buffer tank lower shell (2), the first spherical head (6) and the second spherical head (8) is specifically: polyurethane (PU), polyamide (PA), polyoxymethylene (POM), polypropylene (PP), polyethylene (PE), polysulfone (PSU), polyetherimide (PEI), polyamideimide (PAI), polyetheretherketone (PEEK), polyvinylidene fluoride (PVDF), polyphenylene oxide (PPO), polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET) or polychlorotrifluoroethylene (PCTFE).

3. The composite material buffer tank for LNG vehicles according to claim 1, characterized in that: A plurality of mounting feet (7) are provided on the outer sides of the buffer tank upper shell (1) and the buffer tank lower shell (2), and mounting grooves (14) are provided on the end faces of the mounting feet (7), and embedded nuts (15) are provided inside the mounting grooves (14).

4. The composite material buffer tank for LNG vehicles according to claim 1, characterized in that: A first hot-plug nut (11) is arranged inside the air inlet (4), and a third hot-plug nut (17) is arranged inside the air outlet (16).

5. The composite material buffer tank for LNG vehicles according to claim 4, characterized in that: A mounting hole (5) is provided on the surface of the first boss (3), and a second hot-plug nut (13) is arranged inside the mounting hole (5); an annular groove is provided on the outer surfaces of the second hot-plug nut (13), the first hot-plug nut (11) and the third hot-plug nut (17), and a sealing ring (12) is sleeved inside the annular groove.

6. The composite material buffer tank for LNG vehicles according to claim 1, characterized in that: The outer sides of the buffer tank upper shell (1), the buffer tank lower shell (2), the first spherical head (6) and the second spherical head (8) are collectively sleeved with an outer protective cover shell (10), and the outer protective cover shell (10) is made of glass fiber, carbon fiber or basalt fiber.

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