CN2095305U

CN2095305U - Self-tight type sealing ring

Info

Publication number: CN2095305U
Application number: CN 91216986
Authority: CN
Inventors: 王春益
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-06-22
Filing date: 1991-06-22
Publication date: 1992-02-05

Abstract

The utility model relates to a self-tight type sealing ring, belonging to the seal of pressure vessels in mechanical engineering. The utility model is characterized in that a circular pipe with good deformation performance and rebound ability is made into a concentric circular disc form, or is wound into a spiral coiled pipe form; the pipe orifice of the circular pipe adjacent to a vessel cavity is communicated with the vessel, and the pipe orifice of the circular pipe on the side of a barrel body is sealed; both the upper end face and the lower end face of the circular pipe are provided with annular circular plates of same material, and the annular circular plates are adhered and connected to form a whole by bond agent. The utility model has the advantages of simple manufacture of the sealing structure, low requirement to the process of a flange face, and small pretightening force of screw bolts; the self-tight type sealing ring can be used for the sealing elements of the vessels for fluids storage and transportation in the industries of petroleum, chemical engineering, light industry, food, etc.

Description

Self-tight type sealing ring

The utility model self-fastening ring belongs to the sealing of mechanical engineering pressurized container.

At chemical industry, oil, light industry, each industrial field of food, it is reliable that the storage of fluid and transportation have all proposed the assurance sealability to container, the requirement of not leaking.The sealing of container divides forced seal and self-tightening sealing, forced seal is to rely on the tightening force of bolt to guarantee top cover, have certain contact pressure between seal element and cylindrical shell end and reach sealing, since in press liter after the bolt distortion, top cover rises or distortion has reduced contact pressure, therefore forced seal requires have big bolt to give tight power, to the material proposition higher requirement of flange, bolt.

The development trend of sealing configuration develops to self-tightening sealing, and self-tightening sealing mainly relies on the internal tank pressure medium to produce necessary seal pressure at sealed mouth, to stop the leakage of medium.In the self-energized seal of existing use, more generally " O " type, " C " type, " B " type and combined etc. various multi-form, the problem that their exist is the sealing surface structure complexity, and the surface roughness of sealing surface processing is had relatively high expectations.

The purpose of this utility model provides a kind of simple in structure, easy processing, easy to operate seal ring.

The structure of self-fastening ring such as Fig. 1, Fig. 2, shown in Figure 3, it is made up of pipe with good deformation performance and resilience (2) and plate (1), it is characterized in that:

(1) pipe is made several concentric discs, inside and outside circle coil pipe wall is close to mutually, communicates between disk, and communicates with the pressurized container chamber;

(2) be wound in the helical disk tubulose by a pipe, the top of pipe communicates endcapped with the container pressure chamber;

(3) in concentric discs or spiral coil both ends of the surface up and down, the annular elastic material plate is housed, with bond (3) that it is bonding or be welded into integral body.

Nonmetal and the metallic material that the material of selecting for use has rubber, softly moulds, teflon, aluminium, red copper etc. have good deformation performance and resilience.

The structural feature of self-fastening ring is:

(1) when bolt impose give tight power after, the sealed section shape becomes flat, but after pressurization in the container chamber, because seal ring one end communicates with container, pressure is full of space in the pipe, makes flat tube have its circular performance of recovery, make seal ring tightly be pressed on the flange facing, also can reach the satisfactory sealing effect thereby use less bolt to give tight power, therefore, the employing self-fastening ring can reduce the requirement of strength to bolt.

(2) the flange facing form that adapts of sealing structure circle is face-flange and male and female flange therewith, processing easily, when pressure is not high, one flange size is constant, and another flange size changes, and need not change seal ring, just can reach the satisfactory sealing requirement, when these characteristics, seal ring on being applied in the railway tank car Unloading Device, more outstanding.

Tell use condition of the present utility model below

In light oil tank car Unloading Device, adopt self-fastening ring, device is as shown in Figure 4, tank car flange (7) size is easy because of manufacturer, its excursion d=500～600mm, D=540～640mm, tank car have 8 quick-release bolts (4), blind flange (5) is linked to each other with tank car, seal ring (6) material is oil resistant rubber pipe φ 9 * 1.50, and both ends of the surface have two blocks of rubber plates that 2mm is thick up and down, becomes whole with epoxy resin with pipe and plate are bonding, seal ring external diameter 640mm, internal diameter 540mm.Pressed gas by suction tude (8) to tank car pressurization, pressure make light oil in the tank car along oil outlet tube (9) to outflow, when operation pressure during at 0.035～0.05MPa, good seal does not have and leaks.

Before practicality, impose the 0.2MPa test pressure, pressurize 30 minutes does not have and leaks.

Self-fastening ring can be widely used in the storage of oil plant in oil, the chemical system, soda acid chemical product and the sealing on the transport box, also can be used for the storage of industry fluids such as light industry, food and the seal element of cask.

Provide accompanying drawing and part name below

The axial sectional view of Fig. 1 self-fastening ring

Fig. 2 concentric discs RunddichtringO

Fig. 3 spiral coil RunddichtringO

Fig. 4 seal ring is unloading application drawing on the tank wagon

(1) annular plate (2) pipe

(3) bond (4) quick-release bolt

(5) blind flange (6) seal ring

(7) tank car flange (8) suction tude

(9) oil outlet tube

Claims

1, a kind of self-fastening ring is made up of pipe with good deformation performance and resilience and plate, it is characterized in that:

(1) pipe is made several concentric discs, inside and outside circle coil pipe wall is close to mutually, communicates between disk, and links to each other with the container pressure chamber;

(3) on concentric discs or spiral coil, following both ends of the surface are equipped with annular plectane.

2, according to the described self-fastening ring of claim 1, it is characterized in that: between concentric discs or spiral coil and the annular plectane, bonding or be welded into integral body with bond.

3, according to claim 1 and 2 described self-fastening rings, it is characterized in that: the material that pipe and plate are selected for use is: rubber, softly mould, teflon, aluminium, red copper.