CN203880077U - Bracket sealing device for liquid medium large-diameter high-pressure container - Google Patents

Abstract

The utility model relates to a bracket sealing device for a liquid medium large-diameter high-pressure container, and belongs to the large-size pressure container sealing technology. A large-size high-pressure sealing container can be normally arranged under normal pressure, axial and radial clearances can be removed under high pressure, and sealing protruding is prevented. According to the technical scheme, a protruding annular clamping groove is upwards formed in the outer side of a groove of an O-shaped sealing ring B on a sealing bracket, and an annular groove is formed in the corresponding position of a top cover to be matched with the annular clamping groove. A segment of annular structure with a clamping groove is added to the outer side of the sealing bracket, the upper end face of the annular structure is flush with the upper end face of the sealing bracket, the lower end face of the annular structure is slightly higher than the upper side of a groove of an O-shaped sealing ring A, the annular structure is upward, and an annular groove is formed in the corresponding position of the end of a cylinder to be matched with the annular structure. A shearing ring is arranged on the top cover. A radial and axial clearance compensation and protruding preventing bracket structure is adopted, and a sealing piece is prevented from protruding out. The sealing device is simple in structure, and the sealing problem of the large-size high-pressure container such as a hyperbaric chamber can be effectively solved.

Description

A kind of bracket seal arrangement for liquid medium major diameter high-pressure bottle

Technical field

The utility model relates to a kind of bracket seal arrangement for liquid medium major diameter high-pressure bottle, belongs to large scale sealing for pressure vessels technical field.The seal failure problem that this major diameter, high pressure bracket seal arrangement can be avoided O RunddichtringO to be extruded causing when work, for liquid medium provides solution by most important sealing technique in large scale high-pressure bottle core technology.

Background technique:

At present, the sealing problem of high pressure large scale pressurized container becomes the most scabrous key issue in pressurized container key problem gradually, as the sealing problem in deep water high pressure simulation cabin becomes the bottleneck of whole equipment.Deep water simulated high-pressure cabin is mainly ocean environment implement necessary test simulation environment is provided, the reliability of checking Seatask unit, and necessary evaluation means are provided, think that the later stage carries out the design of ocean deep ocean work equipment, research, experiment necessary simulated environment and hardware evaluation condition is provided.Deep water simulated high-pressure cabin inner chamber will have enough spaces to hold the Seatask unit that need test, therefore deep water simulated high-pressure cabin belongs to liquid medium large scale high-pressure bottle.O RunddichtringO has simple in structure, favorable sealing property, and friction factor is little, the easy feature such as manufacture, therefore used a large amount of O RunddichtringO sealing configurations in deep water simulated high-pressure cabin, seal bracket place is also O RunddichtringO sealing configuration.

When pressure medium is larger, O RunddichtringO is pressed against in opposite side gap, and pressure is larger, and squeeze-out phenomenon is more serious, and when pressure surpasses certain limit, O RunddichtringO will occur damaged and cause seal failure.While working in deep water simulated high-pressure cabin, its inner chamber produces very large pressure, therefore O RunddichtringO is extruded, is the main seal failure form in seal bracket place, deep water simulated high-pressure cabin.The existing solution of extruding problem about O RunddichtringO mainly contains following two kinds: (1) selects suitable O RunddichtringO hardness and trench gap.The hardness range of O RunddichtringO is generally 60～90.Softer person is 60～70, is applicable to low pressure; The general hardness range of harder person is 70～75, is applicable to high pressure.Along with pressure increases, the groove matching gap of O RunddichtringO is little; (2) use back-up ring, in groove, set up back-up ring, can improve the anti-plasticating capacity of O RunddichtringO, during unidirectional hydraulic pressure, establish 1 back-up ring; During two-way water pressure, establish 2 back-up rings, add after back-up ring, O RunddichtringO can be born the pressure of 70MPa, and when workpiece pressure is greater than 10MPa, motion sealing will add back-up ring; When workpiece pressure is greater than 32MPa, back-up ring material is in the majority with teflon and nylon at present, and top grade is combined and adopted, individual prop adopts polyoxymethylene, and its coefficient of kinetic friction is the same with static friction coefficient, is well suited for doing the back-up ring sealing.Solution 1 is theoretical feasible, but in practical operation, is difficult to guarantee just to select suitable O RunddichtringO hardness and seal clearance.Solution 2 adopts back-up ring structure to increase the anti-plasticating capacity of O RunddichtringO, and back-up ring is of a size of 500mm and following, is applicable to solve small scale structures O RunddichtringO and extrudes problem.But deep water simulated high-pressure cabin seal bracket is of a size of the large scale structure that 2530mm is even larger, as still adopted solution 2, the processing of back-up ring and installation all will extremely be difficult to guarantee.

Model utility content:

The purpose of this utility model is for existing solution O RunddichtringO, to extrude the defect of problem scheme, adopt and select the scheme of suitable O RunddichtringO hardness and trench gap in practical operation, to be difficult to guarantee, adopt the scheme complex structure not only of setting up back-up ring in groove, and its back-up ring is difficult to processing and complexity is installed, a kind of bracket seal arrangement for liquid medium major diameter high-pressure bottle of special proposition in large scale structure.

For achieving the above object, the utility model is by the following technical solutions: a kind of bracket seal arrangement for liquid medium major diameter high-pressure bottle is comprised of seal bracket, O RunddichtringO A, O RunddichtringO B, and its structure characteristic is: this bracket seal arrangement is arranged on the cylindrical shell end of stack shell; The i.e. anti-lug structure of an outstanding ring-type draw-in groove is set on the O RunddichtringO groove lateral of seal bracket upside O RunddichtringO B, at top cover corresponding position, an annular recess and protrusion-dispelling respective outer side edges are set, O RunddichtringO B is arranged in the O RunddichtringO groove in seal bracket outside; In seal bracket outside, increase by one section of ring structure with draw-in groove, this ring structure upper-end surface is concordant with seal bracket upper-end surface, lower end surface is a little more than O RunddichtringO A groove upside, this ring-type draw-in groove direction is downward, at cylindrical shell end corresponding position, an annular recess is set and coordinates with ring-type draw-in groove, O RunddichtringO A (3) is arranged in the O RunddichtringO groove in seal bracket (4) outside; Internal diameter and seal bracket external diameter on the external diameter of top cover and cylindrical shell end part seal bracket mounting point are consistent, and shearing ring is installed on top cover.

The principle of O RunddichtringO sealing problem that this bracket seal arrangement solves the liquid medium large scale high-pressure bottle be similar to deep water simulated high-pressure cabin is as follows:

While working in deep water simulated high-pressure cabin, its chamber pressure is approximately 42MPa very much.Now O RunddichtringO A place has radial clearance to compensate to guarantee the sealing effect of O RunddichtringO A; O RunddichtringO B place has axial clearance compensation to guarantee the sealing effect of O RunddichtringO B.But the axial clearance compensation at O RunddichtringO B place is less, under high pressure O RunddichtringO B may still can give prominence to and cause seal failure, now, on seal bracket outside O RunddichtringO B sealed groove outstanding ring-type draw-in groove anti-lug structure stoped O RunddichtringO B to be extruded O RunddichtringO B groove to enter seal clearance, thereby guaranteed the sealing effect of O RunddichtringO B.And O RunddichtringO A place, one section of ring structure with draw-in groove that seal bracket outside increases matches with cylindrical shell end, can effectively reduce seal bracket and the relative movement under high pressure of cylindrical shell end.Under high pressure the seal bracket backlash compensation that outwards expansion brings can guarantee that O RunddichtringO A is not extruded O RunddichtringO A groove and enters seal clearance, thereby has guaranteed the sealing effect of O RunddichtringO A.

The beneficial effects of the utility model are: (1) the utility model adopts radial and axial backlash compensation mechanism and protrusion-dispelling carrier structure, can realize under normal mounting under normal pressure of large scale, high pressure sealing and high pressure and eliminating axially and radial clearance, prevent the outstanding of Sealing; (2) this sealing device structure is simple, and it is convenient to realize, the sealing problem in the time of effectively solving the large scale high-pressure bottles such as similar deep water simulated high-pressure cabin for liquid medium.

Accompanying drawing explanation:

Fig. 1 is the bracket seal arrangement cross-sectional view in deep water simulated high-pressure cabin.

Fig. 2 is the cross-sectional view of this bracket seal arrangement.

In figure, 1, stack shell, 2, cylindrical shell end, 3, O RunddichtringO A, 4, seal bracket, 5, O RunddichtringO B, 6, top cover, 7, shearing ring.

Embodiment:

Deep water simulated high-pressure cabin take below as the concrete application of introducing for the bracket seal arrangement of liquid medium major diameter high-pressure bottle of example:

Deep water simulated high-pressure cabin is comprised of stack shell 1, cylindrical shell end 2, O RunddichtringO A3, seal bracket 4, O RunddichtringO B5, top cover 6, shearing ring 7.When work, deep water simulated high-pressure cabin chamber pressure is very large, now top cover 6 under high pressure, the trend that has moving upward or be out of shape, although now seal bracket 4 also has the trend that moves upward or be out of shape, but the axial clearance compensation producing is less, now O RunddichtringO B5 seal clearance can increase thereupon, and under high pressure O RunddichtringO B5 can be pressed against O RunddichtringO B5 groove one side, is even extruded O RunddichtringO B5 groove and enters seal clearance and cause seal failure.But on seal bracket 4 outside O RunddichtringO B5 sealed groove outstanding ring-type draw-in groove anti-lug structure stoped O RunddichtringO B5 to be extruded O RunddichtringO B5 groove to enter seal clearance, thereby guaranteed the sealing effect of O RunddichtringO B5.And O RunddichtringO A3 place, one section of ring structure with draw-in groove that seal bracket 4 outsides increase matches with cylindrical shell end 2, can effectively reduce seal bracket 4 and cylindrical shell end 2 relative movement under high pressure.Under high pressure seal bracket 4 backlash compensation that outwards expansion brings can guarantee that O RunddichtringO A3 is not extruded O RunddichtringO A3 groove and enters seal clearance, thereby has guaranteed the sealing effect of O RunddichtringO A3.

Claims (1)

1. for a bracket seal arrangement for liquid medium major diameter high-pressure bottle, by seal bracket, O RunddichtringO A, O RunddichtringO B, formed, it is characterized in that: this bracket seal arrangement is arranged on the cylindrical shell end (2) of stack shell (1); The i.e. anti-lug structure of an outstanding ring-type draw-in groove is set on the O RunddichtringO groove lateral of seal bracket (4) upside O RunddichtringO B (5), at top cover (6) corresponding position, an annular recess and protrusion-dispelling respective outer side edges are set, O RunddichtringO B (5) is arranged in the O RunddichtringO groove in seal bracket (4) outside; In seal bracket (4) outside, increase by one section of ring structure with draw-in groove, this ring structure upper-end surface is concordant with seal bracket (4) upper-end surface, lower end surface is a little more than the O RunddichtringO groove upside of O RunddichtringO A (3), this ring-type draw-in groove direction is downward, at cylindrical shell end (2) corresponding position, an annular recess is set and coordinates with ring-type draw-in groove, O RunddichtringO A (3) is arranged in the O RunddichtringO groove in seal bracket (4) outside; Internal diameter and seal bracket (4) external diameter on the external diameter of top cover (6) and cylindrical shell end (2) seal bracket (4) mounting point are consistent, and shearing ring (7) is installed on top cover (6).