Full-multilayer binding container structure

Abstract

The utility model discloses a novel full multi-layer binding container structure, which comprises a spherical end socket and a connecting pipe connected with the spherical end socket, the spherical end socket (2) is of a multi-layer laminated structure, and the spherical end socket is connected with a multi-layer binding laminate (4); the layer number of the multi-layer laminated structure is the same as that of the multi-layer binding laminate (4), and the corresponding layers are fixedly connected; and the external spinning laminate (3) is connected with the spherical end socket (2) and the multiple layers of binding laminates (4) in an attached manner. And an opening for connecting the connecting pipe is formed in each layer of the multi-layer laminated structure at the joint of the spherical end socket and the connecting pipe. According to the utility model, the defects that the large-thickness ball seal is difficult to form, the size deviation after forming is large, the heat treatment requirement is high and the material performance is difficult to guarantee are effectively overcome.

Description

Technical Field

[0001] The utility model relates to the application field of high-pressure fatigue containers and relates to a novel full-multilayer wrapped container structure. Background Art

[0002] At present, with the continuous improvement of industrial production technology and the continuous expansion of production capacity demand, chemical production equipment is constantly developing in the direction of large-scale and high-parameterization. Multi-layer wrapped containers have the advantages of low manufacturing difficulty, flexible material selection, and no deep girth welds. In addition, the inner tube material can be selected from corrosion-resistant materials according to the characteristics of the medium, and the outer layer plate can be selected from pressure vessel steel plates with good welding and processing performance.

[0003] With the efficient development and utilization of hydrogen energy, multi-layer wrapped containers are also being promoted and applied in the field of hydrogen storage. Hydrogen refueling stations need to compress hydrogen to a pressure of 45MPa or above and store it in high-pressure hydrogen storage containers. This container is used to charge and discharge hydrogen in long-tube trailers, high-pressure gas cylinders and other hydrogen use environments, which is generally accompanied by pressure load fluctuations of 20MPa-40MPa. Hydrogen has the characteristics of low minimum ignition energy and fast flame propagation speed. Leakage of high-pressure hydrogen storage containers will cause great safety accidents and property losses.

[0004] The multi-layer wrapped container can realize the storage and release of gaseous hydrogen under the conditions of large diameter, large volume and high pressure. Its inner cylinder is made of austenitic stainless steel with low hydrogen embrittlement sensitivity, and the outer cylinder is made of steel plate for pressure vessels with good welding processing performance. Compared with single-layer thick-walled high-pressure vessels, it has the advantages of discrete defects, good material processing performance and small weld depth. Utility Model Content

[0005] The utility model is to overcome the shortcomings of the existing structure and propose a new full multi-layer wrapped container structure for the problems of difficulty in forming thick ball seals, large dimensional deviation after forming, high heat treatment requirements and difficulty in ensuring material properties.

[0006] The technical solution of the utility model is a fully multi-layer wrapped container structure, including a spherical head and a pipe connected to the spherical head.

[0007] The spherical end cap is a multi-layered laminated structure, and the spherical end cap is connected to the multi-layered wrapped layer plate; the number of layers of the multi-layered laminated structure is the same as the number of layers of the multi-layered wrapped layer plate, and the corresponding layers are fixedly connected; the external spinning layer plate is bonded and connected to the spherical end cap and the multi-layered wrapped layer plate;

[0008] At the connection point between the spherical sealing head and the connecting pipe, each layer of the multi-layer stacked structure is provided with an opening for connecting the connecting pipe.

[0009] The spherical heads on the same layer of the external spinning layer plate side have the same thickness as the multi-layer wrapped layer plates of the corresponding layer, which is convenient for one-to-one welding.

[0010] The fully multi-layer wrapped container structure of the utility model includes a multi-layer stacked spherical head, a spun bonded layer plate and a multi-layer wrapped layer plate. The structure used can relatively easily realize the manufacture of a high-pressure fixed pressure vessel with a large wall thickness. At the same time, the structure of the hot spun bonded layer plate is used at the end to transfer the fillet weld to the spherical head with a lower stress level, thereby reducing the impact of welding defects on equipment safety.

[0011] According to a fully multi-layer wrapped container structure of the utility model, each layer of the multi-layer superimposed spherical head is welded to the corresponding layer of the multi-layer wrapped layer plate respectively.

[0012] According to a fully multi-layer wrapped container structure of the utility model, the external spin-pressed layer plate is attached to the connection between the spherical head and the multi-layer wrapped layer plate.

[0013] According to a fully multi-layer wrapped container structure of the utility model, the end of the external spun layer plate is attached and welded to the multi-layer sleeve spherical head by means of spinning.

[0014] Preferably, the external spun laminate is a multi-layer structure.

[0015] According to a fully multi-layer wrapped container structure of the utility model, when the external spin-pressed layer is a multi-layer structure, the corner welds at the ends of adjacent layers of the external spin-pressed layer are staggered by three times or more the thickness of each layer of the external spin-pressed layer in the circumferential direction of the bonding surface.

[0016] When the multi-layer superimposed head reaches the required thickness, the end of the external spinning layer is spun and welded to the multi-layer sleeve spherical head. The fillet welds at the ends of the adjacent layers of the external spinning layer are staggered 3 times the thickness along the circumferential direction of the bonding surface. The welding intensive area is further discretized so that the outer fillet weld is away from the discontinuous area of ​​the end structure to reduce the influence of stress concentration. The setting of the external spinning layer can be designed by the designer.

[0017] According to a fully multi-layer wrapped container structure of the utility model, the connecting pipe is a T-shaped connecting pipe; the upper end portion of the "T" structure is fixedly connected to the innermost layer of the spherical head.

[0018] The inlet and outlet pipes are made of T-shaped pipe forgings, and the inner side is connected to the first layer of the head by butt welding. The opening radius of the outer layer is smaller than the base circle radius of the T-shaped pipe forging, giving the pipe an axial reaction force. That is, when welding each layer of the outer multi-layer spherical head with the T-shaped pipe forging, it is necessary to open a hole in advance. The opening radius of each layer should be smaller than the maximum rotation radius of the bottom entity of the T-shaped pipe forging. This ensures that after the pipe and the multi-layer ball seal are welded, the axial load generated by the shrinkage of the weld and the internal pressure is borne by the steel plate entity and the weld metal.

[0019] The whole structure except for the pipe is multi-layered, without thick spherical heads and thick cylinders. The mechanical properties of the material are homogenized in the thickness direction, which reduces the difficulty of heat treatment.

[0020] The inlet and outlet pipes are made of T-type pipe forgings, which improves the structure and stress level of the inserted pipe weld.

[0021] According to the utility model, a fully multi-layer wrapped container structure, each layer of the internal single-layer spherical head and the wrapped layer plate is a group of independent containers, and each layer is a continuous structure. The welding of the corresponding layers adopts equal thickness butt welds.

[0022] The inner layer of the multi-layered spherical head can be made of different materials according to the characteristics of the medium. By choosing the same material as the inner tube, better medium compatibility can be achieved, while reducing equipment costs and processing cycles.

[0023] According to a fully multi-layered wrapped container structure of the utility model, when the innermost layer and the adjacent layer are made of different materials, a blind layer structure is provided between the layers. When the innermost layer and the outer layer are made of different materials, in order to reduce the defects of welding of dissimilar steels, a blind layer can be used to isolate the layers.

[0024] The outer spin-formed laminate can be formed by hot forming or cold forming, but after forming, it needs to be heat treated to restore the mechanical properties.

[0025] After the spherical head reaches the required thickness, the roundness and outer radius of the multi-layer sleeve spherical head need to be measured. Only after the inspection meets the standards can the external spinning and bonding be carried out. During the spinning process, attention should be paid to the mechanical damage on the surface of the layer. After the spinning is completed, the spinning surface should be non-destructively tested and polished.

[0026] Beneficial Effects

[0027] Compared with the traditional multi-layer wrapped container, the utility model has the advantages of adopting a full multi-layer structure, including a multi-layer superimposed spherical head. At the same time, the fillet weld is moved to the head position, reducing the density of the end welding area. The large-thickness ball seal is easier to form than the existing technology, the size deviation after forming is small, the heat treatment requirements are low, and the material performance is easy to guarantee. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of a new type of fully multi-layered wrapping container structure.

[0029] Figure 2 It is a schematic diagram of the structure of a T-type pipe forging (1).

[0030] In the figure, 1. T-type pipe forging; 2. Spherical head; 3. External spinning layer; 4. Multi-layer wrapped layer DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0032] The present invention is further described below in conjunction with the accompanying drawings.

[0033] The implementation process of the utility model is as follows:

[0034] A novel fully multi-layer wrapped container structure comprises a T-type pipe forging 1, a spherical head 2, an external spinning layer 3, and a multi-layer wrapped layer 4.

[0035] Each layer of the spherical head 2 of the internal multi-layer laminated structure is welded to the corresponding layer of the multi-layer wrapped layer plate 4. Each single-layer ball seal and wrapped layer plate inside can become a group of independent containers, and each layer is a continuous structure, and the welding adopts equal thickness butt welds. When the multi-layer laminated head reaches the required thickness, the end of the external spun layer plate 3 is spun and welded to the multi-layer sleeve spherical head. The corner welds at the ends of adjacent layers of the external spun layer plate 3 are staggered 3 times the thickness distance along the circumferential direction of the bonding surface. The welding intensive area is further discretized so that the outer corner weld is away from the discontinuous area of ​​the end structure to reduce the influence of stress concentration.

[0036] In a preferred embodiment, the connecting pipe is a T-shaped connecting pipe; the upper end portion of the “T” structure is fixedly connected to the innermost layer of the spherical head 2.

[0037] The structure is composed of a multi-layer wrapped cylinder and a multi-layer superimposed spherical head welded together. In the inner layer, the thickness of the layer head and the layer plate is the same, and they are welded as a whole by butt welds. When the layer head is superimposed to the required thickness, only the number of outer layers is continued to increase. The outer layer plate is spun at the tangent line of the ball seal so that the end of the layer plate fits the outer surface of the multi-layer ball seal, and the adjacent layers are staggered by 3 times the thickness distance along the circumferential direction of the fitting surface. The inlet and outlet pipes are T-type pipe forgings, and the inner side is connected to the first layer head by butt welds. The opening radius of the outer layer plate is smaller than the base circle radius of the T-type pipe forging, giving the pipe an axial reaction force.

[0038] During the manufacturing process, multi-layered spherical heads are processed layer by layer. The inner layer is processed first. The inner layer heads are not allowed to be spliced. Finished heads, forgings or flat plate pressing can be used. After completing the welding of the inner layer head and the cylinder, it is necessary to strictly measure whether the outer radius of the head and the cylinder reaches the designed size. After inspection and confirmation, the next layer of wrapping welding is carried out. When the innermost layer material is different from the outer layer material, in addition to the innermost spherical head not being allowed to be spliced, the spherical heads adjacent to the innermost layer are also not allowed to be spliced.

[0039] After the spherical head reaches the required thickness, the roundness and outer radius of the multi-layer sleeve spherical head need to be measured. Only after the inspection meets the standards can the external spinning and bonding be carried out. During the spinning process, attention should be paid to the mechanical damage on the surface of the layer. After the spinning is completed, the spinning surface should be non-destructively tested and polished.

Claims

1. A fully multi-layer wrapped container structure, comprising a spherical end cap and a pipe connected to the spherical end cap, characterized in that: The spherical sealing head (2) is a multi-layer stacked structure, and the spherical sealing head is connected to the multi-layer wrapped layer plate (4); the number of layers of the multi-layer stacked structure is the same as the number of layers of the multi-layer wrapped layer plate (4), and the corresponding layers are fixedly connected; the external spinning layer plate (3) is fitted and connected to the spherical sealing head (2) and the multi-layer wrapped layer plate (4); At the connection point between the spherical sealing head and the connecting pipe, each layer of the multi-layer stacked structure is provided with an opening for connecting the connecting pipe.

2. A fully multi-layered packaging container structure according to claim 1, characterized in that: Each layer of the multi-layered superimposed spherical head (2) is welded to the corresponding layer of the multi-layered wrapped plate (4).

3. A fully multi-layered packaging container structure according to claim 1, characterized in that: The external spinning layer plate (3) is attached to the connection between the spherical head (2) and the multi-layer wrapping layer plate (4).

4. A fully multi-layered packaging container structure according to claim 1, characterized in that: The end of the external spinning layer plate (3) is attached to and welded to the multi-layer sleeve spherical head by means of spinning.

5. The fully multi-layered packaging container structure according to claim 1, characterized in that: The external spin-pressed layer (3) is a multi-layer structure.

6. A fully multi-layered packaging container structure according to claim 5, characterized in that: The fillet welds at the ends of adjacent layers of the external spun laminate (3) are staggered along the circumferential direction of the bonding surface by a distance three times or more than the thickness of each layer of the external spun laminate.

7. A fully multi-layered packaging container structure according to claim 1, characterized in that: The connecting pipe is a T-shaped connecting pipe; the upper end portion of the connecting pipe is fixedly connected to the innermost layer of the spherical sealing head (2).

8. The fully multi-layered packaging container structure according to claim 1, characterized in that: Each single-layer spherical head and wrapped layer plate inside is a group of independent containers, and each layer is a continuous structure.

9. A fully multi-layered wrapped container structure according to claim 1, characterized in that: When the material of the innermost layer is different from that of the adjacent layer, a blind layer structure is provided between the layers.

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