CN113217803A

CN113217803A - Flat pressure container with tension rod

Info

Publication number: CN113217803A
Application number: CN202110037678.7A
Authority: CN
Inventors: 陆利平; 郑祖中; 万正田; 芮烜; 徐恬; 赵文斌; 沈小兴; 陈海林
Original assignee: Shanghai Merchant Ship Design and Research Institute of CSSC No 604 Research Institute
Current assignee: Shanghai Merchant Ship Design and Research Institute of CSSC No 604 Research Institute
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-08-06

Abstract

The invention discloses a flat pressure vessel with a tension rod, which comprises two rectangular end plates arranged in parallel; the inner sides of the two rectangular end plates are provided with frame structures, and the two frame structures pass through the tension rods connected together; the edges of the two rectangular end plates are connected together by arc-shaped plates, and are enclosed to form a closed container. The pressure vessel has high space utilization, and its structure enables it to have good mechanical properties and the ability to withstand internal pressure.

Description

Flat pressure container with tension rod

Technical Field

The invention relates to the field of LNG storage tanks, in particular to a flat pressure container with a tension rod.

Background

Liquefied Natural Gas (LNG), the main component of which is methane, is known as the cleanest fossil energy on earth. Is colorless, tasteless, nontoxic and noncorrosive, and is a clean energy source.

LNG is stored in dedicated containers. Conventional LNG tanks are typically thin-walled spheres or cylinders because of the high internal pressure. The reason for using circular or cylindrical tank bodies is that the shells of these tank body structures are uniformly stressed and can be made of homogeneous materials, but the spherical or cylindrical tank bodies have a serious disadvantage and insufficient space utilization rate, thereby causing waste of space of ships, automobiles, buildings and the like.

Disclosure of Invention

The invention aims to provide a flat pressure container with a tension rod.

The invention has the technical scheme that the flat pressure container with the tension rod comprises two rectangular end plates which are arranged in parallel; the inner side surfaces of the two rectangular end plates are provided with frame structures, and the frame structures of the two rectangular end plates are connected together through a tension rod; the edges of the two rectangular end plates are connected together through an arc-shaped plate and form a closed container in a surrounding mode.

The invention has the further improvement that the frame structure is a grid structure formed by criss-cross strip steel plates; the strip-shaped steel plate is vertically connected with the rectangular end plate, the inner edge of the strip-shaped steel plate is connected with the inner surface of the rectangular end plate, and the outer edge of the strip-shaped steel plate is connected with the tension rod.

The invention is further improved in that the cross section of the tension rod is in a cross shape and is connected with the intersection of the strip-shaped steel plates in the frame structure.

A further development of the invention is that the two rectangular end plates are identical in shape and that the opposite edges are parallel to each other.

The invention is further improved in that the arc-shaped plate surrounds the edge of the rectangular end plate, and the middle part of the arc-shaped plate protrudes outwards.

The invention has the beneficial effects that: compared with spherical and cylindrical pressure vessels, the flat pressure vessel has the advantages that the shape is close to rectangular, the space utilization rate is high, and the structure enables the flat pressure vessel to have good mechanical properties and the capacity of bearing internal pressure.

Drawings

FIG. 1 is a perspective view of a flat pressure vessel with tension rods;

FIG. 2 is a perspective view of the frame structure and tension bar;

fig. 3 is a cross-sectional view of a flat type pressure vessel with tension rods.

Detailed Description

As shown in fig. 1 to 3, an embodiment of the present invention provides a flat type pressure vessel with tension rods, which includes two rectangular end plates 10 arranged in parallel. Opposite inner sides of the two rectangular end plates 10 are fixedly provided with frame structures 20, and the frame structures 20 of the two are connected together through a plurality of tension rods 30.

The edges of the two rectangular end plates 10 are connected together through an arc-shaped plate 40, and the arc-shaped plate 40 surrounds the rectangular end plates 10 for one circle to form a closed pressure container together with the two rectangular end plates 10.

As shown in fig. 2 and 3, in the present embodiment, the frame structure 20 is a grid structure formed by criss-cross bar-shaped steel plates; the strip steel plate 21 is perpendicularly connected to the rectangular end plate 10, and has an inner edge connected to the inner surface of the rectangular end plate 10 by welding and an outer edge for connection to the tension bar 30. The cross section of the tension bar 30 is cross-shaped and is connected with the intersection of the strip steel plates 21 in the frame structure 20. The tension rods 30 are distributed in an array shape, the distance between every two adjacent tension rods 30 is twice the grid width of the frame structure 20, and due to the arrangement mode, each area of the rectangular end plate 10 is provided with one tension rod 30 for drawing, so that the problem that the deformation of the middle of the rectangular end plate 10 is too large is solved.

In some embodiments, the two rectangular end plates 10 are identical in shape and have opposite edges parallel to each other. The edges of the arc-shaped plates 40 are connected with the edges of the rectangular end plate 10 by means of welding.

In some embodiments, the middle of the arcuate plate 40 is convex toward the outside. In a particular embodiment, the shape of the above-mentioned projection is circular arc, and for a section perpendicular to the edge line of the rectangular end plate 10, the intersection line of the arc-shaped plate 40 and the section is a semicircle having a diameter equal to the distance between the two rectangular end plates 10.

In this embodiment, the frame structure 20 can increase the strength of the rectangular end plates 10, and prevent the rectangular end plates from deforming under the action of internal pressure or external pressure, and when the tension bar 30 pulls the two rectangular end plates 10 through the frame structure to enable the internal pressure to be borne, the position between the rectangular end plates 10 cannot change, so that the stability of the flat pressure vessel can is enhanced. The side wall of the container is a convex arc-shaped plate 40, which has better strength and can bear larger pressure. The rectangular end plate 10 is pulled and connected through the frame structure 20 and the tension rods 30, so that the area of the rectangular end plate 10 can be freely expanded according to the volume requirement, and the problem that the planar rectangular end plate 30 is difficult to bear large internal pressure under the condition of no support is avoided. When the length and width of the rectangular end plate 10 are larger, the area of the frame structure 20 and the number of the tension rods 30 should be increased simultaneously. The surface of the flat pressure vessel can be provided with an insulating layer, and the LNG inlet and outlet can be opened on the rectangular end plate 10.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. A flat pressure vessel with a tension rod, characterized in that it comprises two parallel rectangular end plates; the inner sides of the two rectangular end plates are provided with a frame structure, and the frame structure of the two passes through the tension force. The rods are connected together; the edges of the two rectangular end plates are connected together by arc plates, and are enclosed to form a closed container.

2 . The flat pressure vessel with tension rod according to claim 1 , wherein the frame structure is a grid structure formed by crisscrossing strip-shaped steel plates; the strip-shaped steel plates and the rectangular end The plates are connected vertically, the inner edge of which is connected with the inner surface of the rectangular end plate, and the outer edge is used for connection with the tension rod.

3 . The flat pressure vessel with tension rods according to claim 2 , wherein the cross-section of the tension rods is cross-shaped, and is connected to the intersection of the strip-shaped steel plates in the frame structure. 4 .

4 . The flat pressure vessel with tension rod according to claim 1 , wherein the two rectangular end plates have the same shape, and the opposite edges are parallel to each other. 5 .

5 . The flat pressure vessel with tension rod according to claim 4 , wherein the arc-shaped plate surrounds the edge of the rectangular end plate, and the middle portion of the arc-shaped plate protrudes outward. 6 .