CN218865380U

CN218865380U - Circular opening blanking cover for pressure container airtight test

Info

Publication number: CN218865380U
Application number: CN202223026744.XU
Authority: CN
Inventors: 胡坚堂; 万明燕; 张淑宇; 李启望; 吴月芸; 金松; 王莉; 章波; 瞿宇倩; 俞群
Original assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Current assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-04-14
Anticipated expiration: 2032-11-15

Abstract

The utility model relates to a blanking cover of carrying out the shutoff of pressure test circular opening to pressure vessel belongs to mechanical structure, seal structure design field. A circular opening blanking cover for a pressure container air-tightness test comprises a cover plate, a sealing ring and a fixed limiting part; the maximum outer diameter of the cover plate is larger than the diameter of the circular opening, and the minimum outer diameter of the cover plate is smaller than the diameter of the circular opening; the sealing ring is arranged between the cover plate and the edge of the circular opening and used for sealing the pressure container; the fixed limiting part is used for fixing the cover plate at the circular opening of the pressure container; when the pressure container is used, the cover plate and the sealing ring are placed in the pressure container, and the inner test pressure is utilized to apply pressure to the blocking cover so as to block the circular opening. The utility model has the advantages of as follows: 1. plugging by using internal pressure; 2. an O-shaped sealing ring is used as a sealing element, so that reliable plugging is realized; 3. the higher the pressure is, the tighter the fit between the sealing ring and the pressure container is; 4. the pressure distribution is even, and the sealing performance is better.

Description

Circular opening blanking cover for pressure container airtight test

Technical Field

The utility model relates to a blanking cover of pressure vessel circular opening shutoff of pressure test belongs to mechanical structure, seal structure design field.

Background

In general, pressure vessels such as special fuel tanks and high-pressure gas tanks need to be subjected to an air-tight test in the manufacturing process, and the sealing performance of a welding seam is checked; the semi-finished products which are just welded do not have the common characteristics of flanges, extension bosses, threaded holes and the like for fixing fasteners such as bolts, hoops and the like, so that support balanced with test pressure is provided for plugging objects, and the opening cannot be plugged from the outside. The semi-finished products of the special pressure containers have smooth openings, large inner cavities and small openings, and the openings cannot be plugged by using a common method, such as pipeline rolling waves, flange joints, threaded joints and the like. Therefore, it is necessary to design a new type of plug cover, which can be tightly attached to the container by utilizing the pressure of the test pressure inside the container on the plug cover, so as to achieve the purpose of quickly and effectively plugging the circular opening.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pressure vessel is circular opening blanking cover for airtight test, when pressure test, this blanking cover can provide quick, effectual shutoff to the smooth circular opening of pressure vessel.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a circular opening blanking cover for a pressure container air-tight test comprises a cover plate, a sealing ring and a fixed limiting part; the maximum outer diameter of the cover plate is larger than the diameter of the circular opening, and the minimum outer diameter of the cover plate is smaller than the diameter of the circular opening; the sealing ring is arranged between the cover plate and the edge of the circular opening and used for sealing the pressure container; the fixed limiting part is used for fixing the cover plate at the circular opening of the pressure container; during the use, put into pressure vessel with apron and sealing washer inside, inject the apron in the circular opening part of pressure vessel through fixed spacing portion, it is right to utilize internal test pressure the blanking cover exerts pressure, comes the circular opening of shutoff.

Preferably, the cover plate comprises a plate-shaped member, the circumference of which is composed of two arcs and two straight lines, the two arcs are oppositely arranged and have the same circle center, and the two straight lines are parallel and equidistant to the circle center.

Preferably, the cover plate further comprises a boss, the boss is located on one side of the plate-shaped piece, when the cover plate is used, the plate-shaped piece is located in the circular opening to block the circular opening, and the boss is located at the circular opening and connected with the fixed limiting part; the sealing ring is arranged in the groove at the root of the cover plate boss.

Preferably, the cover plate load capacity must be greater than 2 times the maximum test pressure.

Preferably, the fixed limiting part comprises a clamping plate and a bolt; one end of the clamping plate is fixed with the cover plate through a bolt, and the other end of the clamping plate is pressed on the outer surface of the pressure container, so that the cover plate is limited at the circular opening of the pressure container.

Preferably, the plug cover further comprises a handle, the handle is mounted on the cover plate and protrudes out of the circular opening, and the plug cover is convenient to disassemble and assemble.

The principle of realizing sealing is as follows: the pressure difference higher than the external atmospheric pressure in the pressure container is utilized to form pressure from inside to outside on the cover plate, so that the cover plate, the sealing ring and the opening edge form a sealing boundary, and the sealing effect is achieved. The sealing principle and the structure can achieve the following two special effects: firstly, all parts of the sealing ring are stressed uniformly, and the sealing performance is prevented from being influenced by local upwarping; secondly, along with the pressure rise in the container, the cover plate bears higher pressure, and the sealing effect is better.

The cover plate is a main bearing structure, and the bearing capacity of the cover plate is required to be 2 times greater than the maximum test pressure; the sealing ring as a sealing part needs to be customized according to the opening, and the section shape of the sealing ring can be designed according to the opening condition; the clamping plate and the handle are auxiliary pieces, so that the operation is convenient, and the whole structure of the blocking cover is fixed at the circular opening part before the pressure in the pressure container is boosted, so that the personnel are prevented from being injured accidentally. When the sealing ring is used, the cover plate assembly and the sealing ring are detached and placed in the pressure container, and the sealing ring is arranged in the groove at the root part of the lug boss of the cover plate in the pressure container.

Compared with the prior art, the utility model has the advantages of as follows:

1. plugging by using internal pressure;

2. an O-shaped sealing ring is used as a sealing element, so that reliable plugging is realized;

3. the higher the pressure is, the tighter the fit between the sealing ring and the pressure container is;

4. the pressure distribution is even, and the sealing performance is better.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a side view of FIG. 1;

in fig. 1-2, 1, cover plate; 2. a seal ring; 3. a splint; 4. a bolt; 5. a handle.

Detailed Description

In this embodiment, the opening of the pressure vessel is a circular opening, but in actual use, the opening of the pressure vessel is not limited to a circular opening, and may be in other shapes, for example: polygon, water drop shape, etc. can be set according to the requirement. The present embodiment is described by taking a circular opening as an example.

The present invention will be described in further detail with reference to the accompanying drawings 1-2: a circular opening blanking cover for a pressure container airtight test comprises a cover plate 1, a sealing ring 2 and a fixed limiting part; the cover plate 1 directly bears the internal pressure of the pressure container; the sealing ring 2 seals a gap between the cover plate 1 and the opening of the pressure container; the fixed limiting part is used for fixing the cover plate 1 at the opening of the pressure container; and applying pressure to the plugging cover by using the internal test pressure to plug the circular opening.

As a preferred embodiment of this embodiment, as shown in fig. 1-2, the maximum outer diameter of the cover plate 1 is larger than the diameter of the circular opening, and the minimum outer diameter is smaller than the diameter of the circular opening, and it includes a plate-like member and a boss, the circumference of the plate-like member is composed of two arcs and two straight lines, the two arcs are oppositely arranged and have the same center, the diameter distance between the two arcs is the maximum outer diameter of the cover plate 1, the two straight lines are parallel and equidistant from the center, the vertical distance between the two straight lines is the minimum outer diameter of the cover plate 1, and the minimum outer diameter is slightly smaller than the inner diameter of the circular opening, so that the cover plate 1 can be placed inside the pressure vessel; the boss is positioned on one side of the plate-shaped piece, when the plate-shaped piece is used, the plate-shaped piece is positioned in the circular opening to block the circular opening, and the boss is positioned at the circular opening and connected with the fixed limiting part; the sealing ring 2 is arranged between the cover plate 1 and the edge of the circular opening and used for sealing the pressure container, and in the embodiment, the sealing ring 2 is arranged in a groove at the root of the boss of the cover plate.

As a preferred embodiment of this embodiment, the fixing and limiting part comprises a clamping plate 3 and a bolt 4; one end of the clamping plate 3 is fixed with the cover plate 1 through a bolt 4, and the other end of the clamping plate presses the outer surface of the pressure vessel, so that the cover plate 1 is limited at the circular opening of the pressure vessel.

In order to facilitate the disassembly and assembly of the blanking cover, the blanking cover further comprises a handle 5, wherein the handle 5 is arranged on the boss of the cover plate and protrudes out of the circular opening.

When a circular opening with the diameter D of the pressure container needs to be plugged, two sides of the cover plate 1 are processed to be in the size of two parallel surfaces D-a, so that the cover plate can be flatly placed from the circular opening (the axis of the plugging cover is vertical to the axis of the circular opening) to enter the pressure container, a customized sealing ring 2 is installed in a groove with the diameter D of the bottom of the boss, and the circular opening is plugged. And the cover plate 1 is fixed at the opening of the pressure vessel by using a clamping plate 3 and a bolt 4. When pressure is applied to the interior of the pressure container, the cover plate 1 is tightly attached to the inner surface of the pressure container under the action of the pressure, and the sealing ring 2 is pressed tightly, so that the sealing effect is achieved.

The cover plate 1 is a main bearing structure, and the bearing capacity of the cover plate is required to be 2 times greater than the maximum test pressure; the sealing ring 2 as a sealing part needs to be customized according to the opening, and the section shape can be designed according to the opening condition; splint 3, handle 5 are the auxiliary member, convenient operation, before the inside pressure boost of container, fix blanking cover overall structure at the opening part, avoid personnel to appear accidental injury.

Claims

1. The utility model provides a pressure vessel is circular opening blanking cover for airtight test which characterized in that: the sealing device comprises a cover plate, a sealing ring and a fixed limiting part; the maximum outer diameter of the cover plate is larger than the diameter of the circular opening, and the minimum outer diameter of the cover plate is smaller than the diameter of the circular opening; the sealing ring is arranged between the cover plate and the edge of the circular opening and used for sealing the pressure container; the fixed limiting part is used for fixing the cover plate at the circular opening of the pressure container; during the use, put into pressure vessel with apron and sealing washer inside, inject the apron in the circular opening part of pressure vessel through fixed spacing portion, utilize internal test pressure to the blanking cover exerts pressure, comes the circular opening of shutoff.

2. The circular opening closure for airtight testing of pressure vessel according to claim 1, wherein: the cover plate comprises a plate-shaped part, the circumference of the plate-shaped part consists of two circular arcs and two straight lines, the two circular arcs are arranged oppositely, the circle centers of the circular arcs are the same, and the two straight lines are parallel and equidistant to the circle centers.

3. The circular opening closure for airtight testing of pressure vessel according to claim 2, wherein: the cover plate also comprises a boss, the boss is positioned on one side of the plate-shaped piece, when the cover plate is used, the plate-shaped piece is positioned in the circular opening to block the circular opening, and the boss is positioned at the circular opening and connected with the fixed limiting part; the sealing ring is arranged in the groove at the root of the cover plate boss.

4. The circular opening closure for pressure vessel airtightness testing according to any one of claims 1 to 3, wherein: the cover plate load capacity must be greater than 2 times the maximum test pressure.

5. The circular opening closure for airtight test of pressure vessel according to claim 1, wherein: the fixed limiting part comprises a clamping plate and a bolt; one end of the clamping plate is fixed with the cover plate through a bolt, and the other end of the clamping plate is pressed on the outer surface of the pressure container, so that the cover plate is limited at the circular opening of the pressure container.

6. The circular opening closure for airtight testing of pressure vessel according to claim 1, wherein: the plug cover is characterized by further comprising a handle, wherein the handle is installed on the cover plate and protrudes out of the circular opening, and the plug cover is convenient to disassemble and assemble.