Buffer tank with special end socket structure for LNG (Liquefied Natural Gas) automobile

Abstract

The utility model is applicable to the technical field of buffer tanks with special end socket structures for LNG (liquefied natural gas) automobiles, and particularly relates to a buffer tank with a special end socket structure for an LNG automobile, which comprises a buffer tank upper-section shell, a buffer tank middle-section shell and a buffer tank lower-section shell, the buffer tank upper section shell and the buffer tank middle section shell are connected together in a welded mode, the buffer tank middle section shell and the buffer tank lower section shell are connected together in a welded mode, and the end face, away from the buffer tank middle section shell, of the buffer tank upper section shell and the end face, away from the buffer tank middle section shell, of the buffer tank lower section shell are provided with a first semi-oval end socket and a second semi-oval end socket respectively. According to the utility model, the first semi-elliptical head and the second semi-elliptical head are designed into elliptical shapes with proper radians, so that the special shapes can obviously reduce the slippery probability of fibers when the fibers fall on the surfaces of the heads; and the fibers are more uniformly distributed on the surfaces of the first semi-elliptical seal head and the second semi-elliptical seal head, so that the applicability of the buffer tank with the special seal head structure for the LNG automobile is improved.

Description

Technical Field

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

[0002] Liquefied natural gas (LNG) vehicles are gradually being widely used in the market due to their environmental and economic advantages. In the design of LNG vehicles, the buffer tank is a key component, and its main function is to store and buffer natural gas. However, there are some technical problems in the design of existing buffer tanks, especially in the fiber winding process.

[0003] In the prior art, the heads of buffer tanks are mostly designed in a hemispherical shape, which has many shortcomings in practical applications.

[0004] Specifically, when technicians wind the fiber filaments on the hemispherical head, due to the large curvature of the hemispherical head, the fiber filaments are easy to slip during the winding process and are difficult to fix. This slipping phenomenon not only increases the difficulty of operation, but also reduces work efficiency. In addition, the fiber filaments cannot be evenly distributed on the hemispherical head, resulting in uneven coverage of the fiber filaments on the surface of the head. This uneven distribution not only affects the appearance of the buffer tank, but may also affect its structural strength and service life. Due to the existence of the above problems, the fiber filament winding process becomes complicated and time-consuming, which seriously affects the production efficiency. At the same time, the fiber filament protection effect is not good, resulting in a decrease in the protective performance of the head part. In this regard, the utility model provides an LNG vehicle buffer tank with a semi-elliptical head and a special head structure to solve the above technical problems. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a buffer tank for LNG vehicles with a special head structure, aiming to solve the technical problems mentioned in the background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A buffer tank for an LNG vehicle with a special head structure, comprising an upper shell of a buffer tank, a middle shell of a buffer tank and a lower shell of a buffer tank, wherein the upper shell of the buffer tank and the middle shell of the buffer tank, and the middle shell of the buffer tank and the lower shell of the buffer tank are connected together by welding, and the end surfaces of the upper shell of the buffer tank and the lower shell of the buffer tank away from the middle shell of the buffer tank are respectively provided with a first semi-elliptical head and a second semi-elliptical head, and the surface of the first semi-elliptical head is provided with a first boss, and the surface of the second semi-elliptical head is provided with a third boss, and the surface of the first boss is provided with an air inlet hole, and the surface of the third boss is provided with an air outlet hole;

[0008] A plurality of first internal reinforcing ribs are arranged inside the first semi-elliptical head, and a plurality of second internal reinforcing ribs are arranged inside the second semi-elliptical head. One end of the first internal reinforcing rib extends to the first boss, and the other end extends to the connection between the upper shell of the buffer tank and the first semi-elliptical head. One end of the second internal reinforcing rib extends to the third boss, and the other end extends to the connection between the lower shell of the buffer tank and the second semi-elliptical head.

[0009] Furthermore, the upper shell of the buffer tank, the first semi-elliptical head, the middle shell of the buffer tank, the lower shell of the buffer tank and the second semi-elliptical head are all components made of plastic materials.

[0010] Furthermore, the plastic materials used to prepare the upper shell of the buffer tank, the first semi-elliptical head, the middle shell of the buffer tank, the lower shell of the buffer tank and the second semi-elliptical 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 second boss is provided on the outer side of the lower shell of the buffer tank, and a mounting hole is opened at one end of the second boss. A through hole is opened inside the lower shell of the buffer tank, and the through hole is connected with the inside of the mounting hole.

[0012] Furthermore, a first hot-plug nut is arranged inside the air inlet hole, a second hot-plug nut is arranged inside the air outlet hole, a third hot-plug nut is arranged inside the mounting hole, and annular grooves are provided on the outer sides of the first hot-plug nut, the second hot-plug nut and the third hot-plug nut, and a sealing ring is provided inside the annular groove.

[0013] Furthermore, the outer sides of the upper shell of the buffer tank, the first semi-elliptical head, the middle shell of the buffer tank, the lower shell of the buffer tank and the second semi-elliptical head are collectively sleeved with a protective shell, and the protective shell is made of glass fiber yarn, carbon fiber yarn or basalt fiber yarn.

[0014] Furthermore, hoops are sleeved on both sides of the outer side of the protective shell, and the outer side of the hoop is connected to a sheet metal mounting seat, and a locking bolt is provided on the outer side of the hoop, and the locking bolt is used to limit the hoop to the outer side of the protective shell.

[0015] The utility model provides an LNG vehicle buffer tank with a special head structure, which has the following beneficial effects:

[0016] By designing the first semi-elliptical head and the second semi-elliptical head to be elliptical shapes with appropriate curvature, this special shape can significantly reduce the probability of fiber slippage when falling on the head surface, and make the distribution of fiber filaments on the surfaces of the first semi-elliptical head and the second semi-elliptical head more uniform, thereby improving the applicability of the LNG vehicle buffer tank with a special head structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an LNG vehicle buffer tank with a special head structure.

[0018] Figure 2 The present invention is a structural schematic diagram of a buffer tank for an LNG vehicle with a special head structure, in which the upper shell of the buffer tank, the middle shell of the buffer tank and the lower shell of the buffer tank are in a separated state.

[0019] Figure 3 It is a structural schematic diagram of an upper shell of a buffer tank in an LNG vehicle buffer tank with a special head structure and a first internal reinforcement rib inside the upper shell of the buffer tank.

[0020] Figure 4 It is a structural schematic diagram of a buffer tank lower section shell and a second internal reinforcement rib inside the buffer tank lower section shell in an LNG vehicle buffer tank with a special head structure.

[0021] Figure 5 This is an exploded schematic diagram of an upper shell of a buffer tank in an LNG vehicle buffer tank with a special head structure and various accessories mounted on the upper shell of the buffer tank.

[0022] Figure 6 This is an exploded schematic diagram of a buffer tank lower shell in an LNG vehicle buffer tank with a special head structure and various accessories mounted on the buffer tank lower shell.

[0023] Figure 7 The present invention is a schematic diagram of the structure of an upper section shell of a buffer tank, a middle section shell of a buffer tank and a lower section shell of a buffer tank for an LNG vehicle with a special head structure when they are covered with a protective shell and a hoop.

[0024] Figure 8 This is a schematic diagram of the structure of a protective shell in a buffer tank for an LNG vehicle with a special head structure.

[0025] Fig. 9 The schematic diagram is a structural diagram of a sheet metal mounting seat, a hoop and a locking bolt in a buffer tank for an LNG vehicle with a special head structure.

[0026] In the figure: 1. upper shell of the buffer tank; 2. middle shell of the buffer tank; 3. lower shell of the buffer tank; 4. first boss; 5. first semi-elliptical head; 6. air inlet; 7. second boss; 8. third boss; 9. second semi-elliptical head; 10. first internal reinforcement rib; 11. second internal reinforcement rib; 12. through hole; 13. sealing ring; 14. first hot-plug nut; 15. second hot-plug nut; 16. mounting hole; 17. third hot-plug nut; 18. protective shell; 19. locking bolt; 20. hoop; 21. sheet metal mounting seat; 22. air outlet. DETAILED DESCRIPTION

[0027] 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.

[0028] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0029] like Figure 1-Figure 9 As shown, an embodiment of the utility model provides an LNG vehicle buffer tank with a special head structure, comprising a buffer tank upper shell 1, a buffer tank middle shell 2 and a buffer tank lower shell 3, and the buffer tank upper shell 1 and the buffer tank middle shell 2, the buffer tank middle shell 2 and the buffer tank lower shell 3 are all connected together by welding, and the end surfaces of the buffer tank upper shell 1 and the buffer tank lower shell 3 away from the buffer tank middle shell 2 are respectively provided with a first semi-elliptical head 5 and a second semi-elliptical head 9, and the surface of the first semi-elliptical head 5 is provided with a first boss 4, the surface of the second semi-elliptical head 9 is provided with a third boss 8, the surface of the first boss 4 is provided with an air inlet hole 6, and the surface of the third boss 8 is provided with an air outlet hole 22

[0030] In one embodiment of the utility model, the upper shell 1 of the buffer tank, the first semi-elliptical head 5, the first boss 4 and the first internal reinforcing rib 10 inside the first semi-elliptical head 5 are integrally injection molded, and similarly, the lower shell 3 of the buffer tank, the second semi-elliptical head 9, the third boss 8 and the second internal reinforcing rib 11 inside the second semi-elliptical head 9 are also integrally injection molded;

[0031] After the above two major components are injection molded, the end faces between the upper shell 1 of the buffer tank and the middle shell 2 of the buffer tank, and between the middle shell 2 of the buffer tank and the lower shell 3 of the buffer tank are welded together, and then the LNG vehicle buffer tank with a special head structure is assembled. Through this three-stage tank body connection method, the mold cost can be greatly reduced, so as to improve the economic benefits of the LNG vehicle buffer tank with a special head structure in the production process.

[0032] In order to improve the overall strength of the buffer tank upper shell 1, the first semi-elliptical head 5, the buffer tank middle shell 2, the buffer tank lower shell 3 and the second semi-elliptical head 9, after the buffer tank upper shell 1, the buffer tank middle shell 2 and the buffer tank lower shell 3 are welded together, a multi-layer winding method is usually used to evenly wind glass fiber filaments, carbon fiber filaments or basalt fiber filaments around the outer sides of the buffer tank upper shell 1, the first semi-elliptical head 5, the buffer tank middle shell 2, the buffer tank lower shell 3 and the second semi-elliptical head 9 to form a protective shell 18, that is, the outer sides of the buffer tank upper shell 1, the first semi-elliptical head 5, the buffer tank middle shell 2, the buffer tank lower shell 3 and the second semi-elliptical head 9 are jointly sleeved with a protective shell 18, and the protective shell 18 is made of glass fiber filaments, carbon fiber filaments or basalt fiber filaments;

[0033] When winding fiber filaments on the head of the buffer tank body, technical personnel in this field found that since most of the heads in the prior art adopt a hemispherical shape, this leads to technical problems such as thread slippage and the inability to evenly distribute the fiber filaments on the head when the fiber filaments are wound on the hemispherical head. This technical problem seriously affects the winding efficiency of the fiber filaments on the outer surface of the buffer tank, and further reduces the adequacy of the protection of the first semi-elliptical head 5 by the fiber filaments; however, the above-mentioned technical problems cannot be solved by improving the winding method. Therefore, in this application, technical personnel in this field set the first semi-elliptical head 5 and the second semi-elliptical head 9 to an elliptical shape with an appropriate curvature. Through the design of this special shape, when the fiber filaments fall on the first semi-elliptical head 5 or the second semi-elliptical head 9, the probability of thread slippage is greatly reduced, and the fiber filaments on the surface of the first semi-elliptical head 5 and the second semi-elliptical head 9 are more evenly distributed.

[0034] In this embodiment, a plurality of first internal reinforcing ribs 10 are arranged inside the first semi-elliptical head 5, and a plurality of second internal reinforcing ribs 11 are arranged inside the second semi-elliptical head 9. One end of the first internal reinforcing rib 10 extends to the first boss 4, and the other end extends to the connection between the upper shell 1 of the buffer tank and the first semi-elliptical head 5. One end of the second internal reinforcing rib 11 extends to the third boss 8, and the other end extends to the connection between the lower shell 3 of the buffer tank and the second semi-elliptical head 9. By arranging the first internal reinforcing ribs 10 in the shape of strips inside the first semi-elliptical head 5 and the second internal reinforcing ribs 11 in the shape of strips inside the second semi-elliptical head 9, the strength of the first semi-elliptical head 5 and the second semi-elliptical head 9 can be greatly improved, so that the first semi-elliptical head 5 and the second semi-elliptical head 9 are more stable when put into use.

[0035] In this embodiment, the upper shell 1 of the buffer tank, the first semi-elliptical head 5, the middle shell 2 of the buffer tank, the lower shell 3 of the buffer tank and the second semi-elliptical head 9 are all plastic components, and the plastic materials used to prepare the upper shell 1 of the buffer tank, the first semi-elliptical head 5, the middle shell 2 of the buffer tank, the lower shell 3 of the buffer tank and the second semi-elliptical head 9 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);

[0036] By making the buffer tank upper shell 1, the first semi-elliptical head 5, the buffer tank middle shell 2, the buffer tank lower shell 3 and the second semi-elliptical head 9 from the above materials, the lightweight degree of the LNG buffer tank can be greatly improved.

[0037] In this embodiment, a second boss 7 is provided on the outer side of the buffer tank lower shell 3, and a mounting hole 16 is provided at one end of the second boss 7. A through hole 12 is provided inside the buffer tank lower shell 3, and the through hole 12 is connected to the inside of the mounting hole 16, so that those skilled in the art can monitor the pressure inside the buffer tank in real time by installing a pressure sensor inside the mounting hole 16;

[0038] A first hot-plug nut 14 is disposed inside the air inlet 6, a second hot-plug nut 15 is disposed inside the air outlet 22, a third hot-plug nut 17 is disposed inside the mounting hole 16, and an annular groove is formed on the outer sides of the first hot-plug nut 14, the second hot-plug nut 15 and the third hot-plug nut 17, and a sealing ring 13 is sleeved inside the annular groove;

[0039] The first hot-plug nut 14, the second hot-plug nut 15 and the third hot-plug nut 17 are all firmly installed inside the air inlet 6, the air outlet 22 and the mounting hole 16 by adopting the hot-plug process, and by arranging the first hot-plug nut 14 and the second hot-plug nut 15, the external air inlet joint and the air outlet joint can be conveniently connected to the inside of the buffer tank, and by arranging the third hot-plug nut 17, it is convenient to install a pressure sensor inside the second boss 7, and by sleeve-fitting the sealing ring 13 on the outer side of the first hot-plug nut 14, the second hot-plug nut 15 and the third hot-plug nut 17, the sealing performance between the first hot-plug nut 14 and the first boss 4, the second hot-plug nut 15 and the third boss 8, and the third hot-plug nut 17 and the second boss 7 can be guaranteed.

[0040] In this embodiment, ring hoops 20 are sleeved on both sides of the outer side of the protective shell 18, and the outer side of the ring hoop 20 is connected to a sheet metal mounting seat 21. A locking bolt 19 is provided on the outer side of the ring hoop 20, and the locking bolt 19 is used to limit the ring hoop 20 to the outer side of the protective shell 18. The design of the ring hoop 20, the locking bolt 19 and the sheet metal mounting seat 21 can facilitate the installation of the LNG vehicle buffer tank with a special head structure on the vehicle body.

[0041] 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. An LNG vehicle buffer tank with a special head structure, comprising a buffer tank upper shell (1), a buffer tank middle shell (2) and a buffer tank lower shell (3), wherein the buffer tank upper shell (1) and the buffer tank middle shell (2), and the buffer tank middle shell (2) and the buffer tank lower shell (3) are connected together by welding, characterized in that: The end surfaces of the upper section shell (1) of the buffer tank and the lower section shell (3) of the buffer tank away from the middle section shell (2) of the buffer tank are respectively provided with a first semi-elliptical head (5) and a second semi-elliptical head (9), and the surface of the first semi-elliptical head (5) is provided with a first boss (4), and the surface of the second semi-elliptical head (9) is provided with a third boss (8), the surface of the first boss (4) is provided with an air inlet hole (6), and the surface of the third boss (8) is provided with an air outlet hole (22); A plurality of first internal reinforcing ribs (10) are arranged inside the first semi-elliptical head (5), and a plurality of second internal reinforcing ribs (11) are arranged inside the second semi-elliptical head (9). One end of the first internal reinforcing rib (10) extends to the first boss (4), and the other end extends to the connection between the upper shell (1) of the buffer tank and the first semi-elliptical head (5). One end of the second internal reinforcing rib (11) extends to the third boss (8), and the other end extends to the connection between the lower shell (3) of the buffer tank and the second semi-elliptical head (9).

2. The LNG vehicle buffer tank with a special head structure according to claim 1 is characterized in that: The buffer tank upper shell (1), the first semi-elliptical head (5), the buffer tank middle shell (2), the buffer tank lower shell (3) and the second semi-elliptical head (9) are all components made of plastic.

3. The LNG vehicle buffer tank with a special head structure according to claim 2 is characterized in that: The plastic materials used to prepare the buffer tank upper shell (1), the first semi-elliptical head (5), the buffer tank middle shell (2), the buffer tank lower shell (3) and the second semi-elliptical head (9) 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).

4. The LNG vehicle buffer tank with a special head structure according to claim 1 is characterized in that: A second boss (7) is arranged on the outer side of the buffer tank lower shell (3), and a mounting hole (16) is opened at one end of the second boss (7); a through hole (12) is opened inside the buffer tank lower shell (3), and the through hole (12) is connected to the inside of the mounting hole (16).

5. The LNG vehicle buffer tank with a special head structure according to claim 4 is characterized in that: A first hot-plug nut (14) is arranged inside the air inlet (6), a second hot-plug nut (15) is arranged inside the air outlet (22), a third hot-plug nut (17) is arranged inside the mounting hole (16), and an annular groove is formed on the outer sides of the first hot-plug nut (14), the second hot-plug nut (15) and the third hot-plug nut (17), and a sealing ring (13) is sleeved inside the annular groove.

6. The LNG vehicle buffer tank with a special head structure according to claim 1 is characterized in that: The outer sides of the buffer tank upper shell (1), the first semi-elliptical head (5), the buffer tank middle shell (2), the buffer tank lower shell (3) and the second semi-elliptical head (9) are collectively sleeved with a protective shell (18), and the protective shell (18) is made of glass fiber yarn, carbon fiber yarn or basalt fiber yarn.

7. The LNG vehicle buffer tank with a special head structure according to claim 6 is characterized in that: Ring hoops (20) are sleeved on both sides of the outer side of the protective shell (18), and the outer side of the ring hoop (20) is connected to a sheet metal mounting seat (21). A locking bolt (19) is provided on the outer side of the ring hoop (20), and the locking bolt (19) is used to limit the ring hoop (20) to the outer side of the protective shell (18).

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