Lightweight structure of outer sealing head of vehicle liquefied natural gas bottle

Abstract

The utility model is suitable for the technical field of vehicle liquefied natural gas bottles, and provides a vehicle liquefied natural gas bottle outer seal head lightweight structure which comprises a shell, an inner container is arranged in the shell, a front outer seal head is arranged at the front end of the inner container, a plurality of first reinforcing ribs are arranged on the front outer seal head in a radial mode, and a plurality of second reinforcing ribs are arranged on the front outer seal head. A rear outer sealing head is arranged at the rear end of the inner container, and a supporting rod is further arranged between the rear outer sealing head and the inner container. The rear supporting assembly comprises second reinforcing ribs and a lantern ring, the second reinforcing ribs are arranged on the rear outer sealing head in a radial mode, the lantern ring is installed on the supporting rod, and a supporting circular plate connected with the rear outer sealing head is further installed on the lantern ring. According to the structure, the radial reinforcing rib structures are respectively punched on the front outer sealing head and the rear outer sealing head to improve the rigidity, so that the weight of the gas cylinder is effectively reduced, the cost is saved, the use working condition of the gas cylinder is met, and the use safety of the gas cylinder is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquefied natural gas bottles for vehicles, and in particular relates to a lightweight structure of an outer sealing head of a liquefied natural gas bottle for vehicles. Background Art

[0002] In recent years, with the gradual establishment and popularization of low-carbon life, and with the gradual establishment and implementation of national energy conservation, emission reduction, and green environmental protection policies and regulations, automobile energy conservation has become a key research topic in the development of the automobile industry. Studies have shown that reducing the weight of the car itself is one of the effective measures to improve the fuel economy of the car and reduce the CO2 emissions of the car. According to a report by the World Aluminum Association, for every 10% reduction in the weight of a general car, fuel consumption can be reduced by 6% to 8%.

[0003] At present, large-volume liquefied natural gas cylinders for vehicles adopt a double-layer structure. The inner tank contains low-temperature liquefied natural gas, and the outer shell and the inner tank together form a vacuum interlayer to keep the low-temperature liquid in the inner tank cold. The outer shell also supports the inner tank. The outer head of the vehicle liquefied natural gas cylinder mainly supports the inner tank and seals. The thickness of the outer head is directly related to the strength of the cylinder support structure. If the outer head is not stiff enough, it will become unstable and sag during the vacuum pumping process of the cylinder. During the use of the cylinder, due to the influence of complex road conditions, the cylinder will be impacted in the front, back, left and right directions, as well as bumps in the vertical direction. The instantaneous vertical acceleration of the cylinder can reach 7g. Insufficient stiffness of the outer head will cause the front and rear supports to break or the welds to crack, affecting its use. Therefore, the stiffness of the outer head of the vehicle liquefied natural gas cylinder must meet the requirements of all the above working conditions to ensure safe use.

[0004] Currently, the wall thickness of the outer heads of large-volume gas cylinders in the industry is about 4-5mm, and the weight of a single head is about 40-50kg. They are all made of austenitic stainless steel, which has a high cost and is not conducive to reducing the weight of the entire vehicle. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a lightweight structure of the outer head of a liquefied natural gas bottle for a vehicle, aiming to solve the problems raised in the above-mentioned background technology.

[0006] The utility model is implemented as follows: a lightweight structure of an outer head of a liquefied natural gas bottle for a vehicle, comprising an outer shell, an inner liner is arranged inside the outer shell, a front outer head is arranged at the front end of the inner liner, a plurality of radially arranged first reinforcing ribs are arranged on the front outer head, a rear outer head is arranged at the rear end of the inner liner, and a support rod is also arranged between the rear outer head and the inner liner, and further comprising:

[0007] A front support assembly, the front support assembly is arranged on the front outer head, and the front outer head is connected to the inner tank through the front support assembly;

[0008] The rear support assembly comprises a second reinforcing rib radially arranged on the rear outer head, and a sleeve installed on the support rod, wherein a supporting circular plate connected to the rear outer head is also installed on the sleeve.

[0009] According to a further technical solution, six first reinforcing ribs and six second reinforcing ribs are provided, and the six first reinforcing ribs and the second reinforcing ribs are evenly distributed on the front outer head and the rear outer head.

[0010] According to a further technical solution, both the front outer head and the rear outer head are butterfly-shaped heads.

[0011] According to a further technical solution, the first reinforcing rib and the second reinforcing rib are both arranged on the front outer head and the rear outer head by stamping.

[0012] According to a further technical solution, the nominal thickness of the front outer head and the rear outer head are both 3 mm.

[0013] The embodiment of the utility model provides a lightweight structure of an outer head of a liquefied natural gas bottle for a vehicle. The rigidity is improved by stamping radial reinforcing rib structures on the front outer head and the rear outer head respectively. The nominal thickness of the front outer head and the rear outer head can be reduced from 4 mm to 3 mm, which effectively reduces the weight of the gas cylinder and saves costs. At the same time, the use conditions of the gas cylinder are met to ensure the safe use of the gas cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional view of a lightweight structure of an outer cover of a liquefied natural gas bottle for a vehicle provided in an embodiment of the utility model;

[0015] Figure 2 A right side view of a lightweight structure of an outer cover of a liquefied natural gas bottle for a vehicle provided by an embodiment of the utility model;

[0016] Figure 3 A left side view of a lightweight structure of an outer head of a liquefied natural gas bottle for a vehicle provided in an embodiment of the utility model.

[0017] In the attached drawings: front outer head 1; outer shell 2; inner liner 3; rear outer head 4; rear support assembly 5; support circular plate 51; collar 52; second reinforcing rib 53; front support assembly 6; support rod 7. DETAILED DESCRIPTION

[0018] 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.

[0019] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0020] like Figure 1-3 As shown, a lightweight structure of an outer head of a liquefied natural gas bottle for a vehicle provided by an embodiment of the utility model comprises an outer shell 2, an inner liner 3 is arranged inside the outer shell 2, a front outer head 1 is arranged at the front end of the inner liner 3, a plurality of radially arranged first reinforcing ribs are arranged on the front outer head 1, a rear outer head 4 is arranged at the rear end of the inner liner 3, and a support rod 7 is also arranged between the rear outer head 4 and the inner liner 3, and further comprises:

[0021] A front support assembly 6, wherein the front support assembly 6 is disposed on the front outer head 1, and the front outer head 1 is connected to the inner tank 3 via the front support assembly 6;

[0022] The rear support assembly 5 includes a second reinforcing rib 53 radially arranged on the rear outer head 4, and a collar 52 installed on the support rod 7, and a supporting circular plate 51 connected to the rear outer head 4 is also installed on the collar 52.

[0023] In the embodiment of the utility model, six first reinforcing ribs and six second reinforcing ribs 53 are provided, and the six first reinforcing ribs and the second reinforcing ribs 53 are evenly distributed on the front outer head 1 and the rear outer head 4. The thickness of the outer head is thinned by providing radial first reinforcing ribs and second reinforcing ribs 53, and the rigidity of the front outer head 1 and the rear outer head 4 is improved. The support rod 7 supports the inner liner through the rear outer head 4 and the rear support assembly 5. When the gas cylinder is assembled on the vehicle, the impact during driving is transmitted to the inner liner 3 through the outer shell 2. The inner liner 3 vibrates up and down and swings back and forth and left and right relative to the outer shell. The radial first reinforcing ribs and the second reinforcing ribs 53 are used to improve the rigidity of the front outer head 1 and the rear outer head 4, resist the deformation tendency, and ensure the safe and reliable use of the gas cylinder. Through the vibration test and the actual loading bad road test, this solution meets the requirements of the vehicle use conditions.

[0024] As a preferred embodiment of the utility model, the front outer head 1 and the rear outer head 4 are both butterfly heads, which are generally first punched into a butterfly shape, and then a convex reinforcing rib shape is punched out through a rib pressing mold. The convex shape can prevent the head body from deforming during the rib pressing process, and then the reinforcing ribs are used to resist the deformation trend of the front outer head 1 and the rear outer head 4, thereby improving the stiffness of the support and preventing instability.

[0025] As a preferred embodiment of the utility model, the nominal thickness of the front outer head 1 and the rear outer head 4 are both 3 mm, which is 1 mm thinner than the conventional head thickness. The weight of a single head can be reduced by more than 10 kg, and the weight of a gas cylinder can be reduced by more than 20 kg, saving about 360 yuan in costs, and also contributing to the weight reduction of the entire vehicle.

[0026] 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 lightweight structure for the outer head of a liquefied natural gas bottle for a vehicle, comprising an outer shell, wherein an inner liner is arranged inside the outer shell, characterized in that: The front end of the inner liner is provided with a front outer head, the front outer head is provided with a plurality of radially arranged first reinforcing ribs, the rear end of the inner liner is provided with a rear outer head, and a support rod is further provided between the rear outer head and the inner liner, and further includes: A front support assembly, the front support assembly is arranged on the front outer head, and the front outer head is connected to the inner tank through the front support assembly; The rear support assembly comprises a second reinforcing rib radially arranged on the rear outer head, and a sleeve installed on the support rod, wherein a supporting circular plate connected to the rear outer head is also installed on the sleeve.

2. The lightweight structure of the outer head of the liquefied natural gas bottle for vehicle according to claim 1 is characterized in that: Six first reinforcing ribs and six second reinforcing ribs are provided, and the six first reinforcing ribs and the six second reinforcing ribs are evenly distributed on the front outer head and the rear outer head.

3. The lightweight structure of the outer head of the liquefied natural gas bottle for vehicle according to claim 1 is characterized in that: The front outer head and the rear outer head are both butterfly-shaped heads.

4. The lightweight structure of the outer head of the liquefied natural gas bottle for vehicle according to claim 3 is characterized in that: The first reinforcing rib and the second reinforcing rib are both arranged on the front outer head and the rear outer head by stamping.

5. The lightweight structure of the outer head of the liquefied natural gas bottle for vehicle according to claim 1 is characterized in that: The nominal thickness of the front outer head and the rear outer head are both 3 mm.

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