Air cylinder

Abstract

The utility model relates to an air cylinder. The air cylinder comprises a cylinder body and a chord plate, the barrel body is provided with a barrel body longitudinal welding seam; the chord plate is arranged on the inner side of a longitudinal welding seam of the barrel in the longitudinal direction and is in laser welding with the inner wall of the barrel. By adding the chord plate structure, the pressure resistance of the air cylinder is improved, meanwhile, the appearance of the air cylinder is not influenced, the structure has a more obvious effect on the large-volume air cylinder, and the chord plate structure can be applied to the aspects of improving the product performance of the large-volume air cylinder or reducing the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile gas cylinder safety, in particular to a gas cylinder, in particular to a gas cylinder structure capable of improving strength. Background Art

[0002] The air cylinder is a gas storage device in the automobile braking system. It is used to store the gas compressed by the air compressor and is used in automobile braking, horn and other systems. The air cylinder must meet the pressure resistance of 5 times the working pressure, and the circumferential permanent deformation should not be greater than 1%. The longitudinal seam of the air cylinder is MIG welded (metal inert-gas welding). When there are no defects in the welding, the weak point is located in the heat-affected zone at the edge of the longitudinal seam in the center of the cylinder. The strength of the heat-affected zone is lower than that of the parent material. When the strength of the selected plate meets the design requirements but the strength of the heat-affected zone cannot meet the pressure resistance requirements, the thickness of the plate needs to be increased to improve the strength, which increases the cost.

[0003] Therefore, how to improve the strength of the gas cylinder while reducing the cost is a technical problem that needs to be solved. Summary of the invention

[0004] In order to solve the problem of low strength of the heat affected zone of the gas cylinder in the above background technology, the utility model proposes a gas cylinder with good processability and improved pressure resistance to overcome the problem of low strength of the heat affected zone of the gas cylinder.

[0005] The utility model is realized by the following technical solutions:

[0006] The above-mentioned air storage cylinder comprises a cylinder body and a chord plate; the cylinder body has a cylinder body longitudinal weld; the chord plate is longitudinally arranged inside the cylinder body longitudinal weld and laser welded to the inner wall of the cylinder body.

[0007] The air storage cylinder, wherein: the chord plate is 3-5 mm away from the inner side of the longitudinal weld of the cylinder. The thickness of the chord plate is 2-3 mm. The chord plate is a strip structure, and the two long sides are laser welded to the inner wall of the cylinder respectively.

[0008] The gas storage cylinder, wherein: the gas storage cylinder includes an end cover; the end cover has a pair of end covers respectively arranged at both ends of the cylinder body, and the end cover and the cylinder body are welded through a ring seam.

[0009] The gas storage cylinder, wherein: the gas storage cylinder includes a pipe joint seat; there are multiple pipe joint seats, which are respectively welded and fixed to the cylinder body and the end cover.

[0010] The gas storage cylinder, wherein: the cylinder body, the end cover and the pipe joint seat are made of aluminum alloy with a thickness of 3 to 4 mm. Beneficial Effects

[0011] Compared with the existing gas cylinder structure, the chord plate in the inner cavity of the gas cylinder of the utility model is laser welded, with a small heat-affected zone and little strength reduction; when the inner cavity of the gas cylinder is inflated and deformed circumferentially, the chord plate arranged under the longitudinal seam can be deformed first by force, sharing the tensile stress for the longitudinal seam of the cylinder body, reducing the stress in the heat-affected zone of the welding at the edge of the longitudinal seam in the center of the cylinder body, thereby improving the pressure resistance of the gas cylinder without affecting the appearance of the gas cylinder. This structure has a more obvious effect on large-volume gas cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the gas storage cylinder of the utility model;

[0013] Figure 2 It is a partial cross-sectional view of the chord plate structure of the air storage cylinder of the utility model.

[0014] Description of reference numerals:

[0015] 1 cylinder 11 cylinder longitudinal weld 2 end cover 21 annular seam 3 pipe joint seat 4 chord plate

[0016] 41 chord plate weld. DETAILED DESCRIPTION

[0017] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0018] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0019] In the description of the embodiments of the present application, the orientation or position relationship indicated by the technical terms "length", "up", "down", "longitudinal", etc. is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0020] The utility model is described in detail below with reference to the accompanying drawings and specific examples.

[0021] like Figure 1 , Figure 2 As shown, the air storage cylinder of this embodiment includes a cylinder body 1, an end cover 2, a pipe joint seat 3, and a chord plate 4.

[0022] The cylinder 1 is a structure formed by rolling and longitudinally welding a plate, and has a cylinder longitudinal weld 11 , and the edge of the cylinder longitudinal weld 11 has a longitudinal weld heat-affected zone.

[0023] The end cover 2 is made by the process of shearing, blanking, forming, punching, spinning and closing, and has a pair of ends disposed at both ends of the cylinder 1. The end cover 2 and the cylinder 1 are welded through an annular seam 21.

[0024] There are multiple pipe joint seats 3, which are respectively welded and fixed to the cylinder 1 and the end cover 2.

[0025] The chord plate 4 is a strip structure, arranged in the inner cavity of the cylinder 1, and arranged longitudinally on the inner side of the longitudinal weld 11 of the cylinder. The two long sides of the chord plate 4 are laser welded to the inner wall of the cylinder 1 to form a chord plate weld 41, and the two ends are 20 mm away from the edge. Since the heat affected zone of the welding between the chord plate 4 and the cylinder 1 is small and the strength is reduced very little, the chord plate 4 is supported on the inner wall of the cylinder 1 to improve the strength of the heat affected zone of the longitudinal weld of the cylinder. By adopting the chord plate 4 structure, the strength can be improved without increasing the wall thickness of the cylinder 1, thereby reducing the cost.

[0026] Furthermore, the chord plate 4 is 3 to 5 mm away from the inner side of the longitudinal weld 11 of the cylinder. Usually, the heat-affected zone area of ​​the longitudinal weld 11 of the cylinder is within the minimum 4 mm range and the maximum 10 mm range of the weld edge. When the distance between the chord plate 4 and the inner side of the longitudinal weld 11 of the cylinder is less than 3 mm, the two sides of the chord plate 4 are supported close to the heat-affected zone of the longitudinal weld 11 of the cylinder, and the strength of the heat-affected zone of the longitudinal weld 11 of the cylinder can be locally enhanced but the optimal strength effect cannot be achieved. When it exceeds 5 mm, the angle between the chord plate and the cylinder becomes larger, the force sharing effect is not good, and the size of the chord plate is increased, which increases the weight.

[0027] Furthermore, the chord plate 4 is made of a plate material that is slightly thinner than the cylinder material by 2 to 3 mm; the width of the chord plate 4 is determined according to the diameter of the cylinder 1 .

[0028] Furthermore, the gas storage cylinder component is made of aluminum alloy, and the material thickness is 3 to 4 mm.

[0029] The gas cylinder of the utility model has a small heat-affected zone and little strength reduction because the chord plate 4 in the inner cavity of the gas cylinder is welded by laser, and when the inner cavity of the gas cylinder is inflated to produce circumferential deformation, the chord plate 4 arranged under the longitudinal weld 11 of the cylinder body can be deformed first by the force, and share the tensile stress of the longitudinal weld 11 of the cylinder body, reducing the stress in the heat-affected zone of the welding at the edge of the central longitudinal seam of the cylinder body 1, thereby improving the pressure resistance of the gas cylinder without affecting the appearance of the gas cylinder. This structure has a more obvious effect on large-volume gas cylinders.

[0030] The above is a specific implementation of the utility model, which does not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and deformations made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model. The entire structure of this utility model is simple and reasonable, easy to manufacture, install and use, and has a wide range of uses. It can be used to improve the compressive strength of aluminum alloy gas cylinders and reduce technical costs.

Claims

1. A gas storage cylinder, characterized in that: The air storage cylinder comprises a cylinder body and a string plate; The cylinder has a longitudinal weld of the cylinder and is welded and fixed with a pipe joint seat; The chord plate is longitudinally arranged inside the longitudinal weld of the cylinder and is laser welded to the inner wall of the cylinder.

2. The gas reservoir according to claim 1, characterized in that: The chord plate is 3 to 5 mm away from the inner side of the longitudinal weld of the cylinder.

3. The gas reservoir according to claim 1, characterized in that: The thickness of the chord plate is 2-3 mm.

4. The gas storage cylinder according to any one of claims 1 to 3, characterized in that: The chord plate is a strip-shaped structure, and two long sides are respectively laser-welded to the inner wall of the cylinder.

5. The gas reservoir according to claim 1, characterized in that: The gas storage cylinder comprises an end cover; the end cover has a pair of end covers which are respectively arranged at two ends of the cylinder body, and the end cover and the cylinder body are welded through an annular seam.

6. The gas reservoir according to claim 5, characterized in that: The end cover is fixedly welded with a pipe joint seat.

7. The gas reservoir according to claim 6, characterized in that: The cylinder, end cover and pipe joint seat are made of aluminum alloy with a thickness of 3 to 4 mm.

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