CN2126885Y

CN2126885Y - High pressure self-tightening sealing structure without pretightening

Info

Publication number: CN2126885Y
Application number: CN 92215869
Authority: CN
Inventors: 顾宗义
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-15
Filing date: 1992-07-15
Publication date: 1993-02-10
Anticipated expiration: 2002-07-15

Abstract

The utility model relates to a high pressure self-tightening sealing structure without pretightening. As one or more ring slots 10 are arranged on the cylinder surface of a top cover 1 or the inner surface of a cylinder end part 8, O-shaped sealing rings 9 are put in the slots, so the utility model has a pre-sealing function. Compared with a typical Uhde sealing structure, a diversion ring 4, diversion screw bolts 2 and screw nuts 3 are canceled; the utility model has the advantages of simple structure, convenient operation, cost reduction, and bigger seal force. The structure is suitable for the hard seal of a pressure pad 7 made of hard metals, and is also suitable for the soft seal of the pressure pad 7 made of soft metals.

Description

High pressure self-tightening sealing structure without pretightening

The utility model belongs to the high pressure self-fastening sealing structure.

As everyone knows, in the high pressure self-fastening sealing structure, all need to apply earlier one and sizablely give tight power, make and produce sealing between sealed pressure pad and container wall and the top cover, when working pressure progressively raise, this sealing force increased along with the increase of interior pressure then, so sealing is very reliable.

Fig. 1 is this typical sealing configuration--a wood closure structure.1. top covers among (seeing the figure J6 of GB150-89 " Steel Pressure Vessels ") figure; 2. pin down bolt; 3. nut; 4. pin down ring; 5. four cyclizations; 6. turnbuckle; 7. pressure pad; 8. this sealing configuration in cylindrical shell end must pin down bolt 2 and applies sizable tight power of giving when mounted pining down ring one on 4 circle, makes top cover 1.Pressure pad 7 between four cyclizations 5 and the cylindrical shell end 8 is subjected to the three-dimensional extruding, makes the enough specific pressures of generation between the sealing surface, could produce and give sealing.Pining down ring 4 concerning this structure pins down bolt 2 nuts 3 and is absolutely necessary.

The purpose of this utility model is to provide a kind of tight high pressure self-fastening sealing structure that need not give, and also promptly cancels other part shown in 2 among Fig. 1,3,4, can reach the purpose of giving sealing equally.

Implementing method is at the garden post matching part of top cover 1 with cylindrical shell end 8, is driving one or multi-channel circular groove on the cylinder of the garden of top cover 1 or on the internal surface of cylindrical shell end 8, loads onto " O " shape seal ring inside.This round section joint ring just plays the effect of giving sealing.In the ordinary course of things, one round section joint ring sealed with regard to enough giving.

Be further explained below in conjunction with embodiment.

Fig. 2 is embodiment 1, and it is a kind of improved wood closure structure.1,5,6,7,8 is identical with Fig. 1 among the figure, 9 " O " shape seal ring; 10, circular groove.Among Fig. 12,3,4 part cancel alls in addition in this embodiment.Have one circular groove 10 on the cylinder of the garden of top cover 1, this road circular groove also can be opened on the internal surface of cylindrical shell end 8.Dress " O " shape seal ring 9 in the groove.When working pressure in the cylindrical shell rises, seal by " O " shape seal ring 9 at the beginning, in the pressure range of round section joint ring 9 energy reliable sealings, top cover 1 has been subjected to very large axial force, enough makes the enough big specific pressure of generation between pressure pad 7 and top cover 1 and the cylindrical shell end 8 and reaches reliable selfsealings.

Fig. 3 is embodiment 2, is a kind of improved seal by wedge-like gasket structure, and 1,5,6,7,8,9,10 is same as shown in Figure 2 among the figure.The 11st, annular cushion block.Pressure pad 7 among Fig. 1, Fig. 2 is hard metallic material manufacturings, pressure pad 7 then is the cambridge ring made from softer metals in the present embodiment, its yield limit is more much lower with the material yield limit of cylindrical shell end 8 than top cover 1, pressure pad 7 is subjected to triaxial pressure and surrenders under working pressure, for the material that prevents pressure pad 7 is squeezed away, therefore add the annular cushion block of doing by hard metallic material 11 at an upper portion thereof.

Among the embodiment 1 and 2 since cancelled 2 among Fig. 1,3,4 in addition parts make designs simplification, mounting or dismounting are convenient, manufacture cost descends, the sealing force that produces is then bigger.

Claims

1, a kind of high pressure self-fastening sealing structure of forming by top cover 1, four cyclizations 5, turnbuckle 6, pressure pad 7 and cylindrical shell end 8, it is characterized in that on the garden post internal surface of on the cylinder of the garden of top cover 1 or cylindrical shell end 8, having 1 road or multiple tracks circular groove 10, " O " shape seal ring 9 is housed in the groove.

2,, it is characterized in that described pressure pad 7 can be the cambridge ring that make a kind of soft metal, and add the annular cushion block 11 that together hard metal is made at an upper portion thereof by the described high pressure self-fastening sealing structure of claim 1.