CN212804698U - Octagonal cushion - Google Patents

Abstract

The utility model relates to the technical field of sealing gaskets, and aims to provide an octagonal gasket, which comprises a gasket body arranged between annular trapezoidal grooves on two flanges, wherein the opening width of the trapezoidal groove is larger than the width of the groove bottom, an annular cavity is formed between the end part of the gasket body and the inner wall of the trapezoidal groove, and two ends of the gasket body are respectively provided with an annular rubber gasket which fills the cavity; the utility model discloses a cavity that forms between the tip of rubber pad body and the inner wall of dovetail groove is filled to the rubber pad, prevents that high-pressure medium from destroying the leakproofness between ring pad body and the flange, makes the ring pad body possess lasting reliable leakproofness.

Description

Octagonal cushion

Technical Field

The utility model relates to a sealed technical field that fills up, in particular to octagon pad.

Background

The flange gasket is used for connecting the flanges of the pipeline and is a sealing element between two flanges. Media, pressure and temperature directly affect the choice of flange gaskets, while the octagonal gasket was originally sourced in the united states, first used in the boiler sector in the 20 th century and then received particular attention in the oil production and refining industries, and as the temperature and pressure of steam power plants increase, the gasket is commonly applied to high temperature and high pressure steam, high temperature and high pressure valve covers, and the like.

The Chinese patent document with the publication number of CN201339784Y in the prior art discloses a balanced cambered-surface octagonal metal sealing ring gasket, which comprises a ring gasket arranged between trapezoidal grooves of involutory flanges, wherein the inlet of the trapezoidal groove is larger than the bottom opening, the section of the ring gasket is in a symmetrical octagonal shape, the thickness surface of the ring gasket is a plane, the width surface is an inner annular surface and an outer annular surface, the distance between the inner annular surface and the outer annular surface is larger than the width of the plane of the ring gasket, and the adjacent thickness surfaces are connected with the width surface through convex curved surfaces.

The above prior art solutions have the following drawbacks: a gap is formed between the two ends of the ring gasket and the bottom of the trapezoidal groove, when the sealing effect is lost between the inclined inner wall of the ring gasket and the inclined inner wall of the trapezoidal groove, a high-pressure medium enters the gap and impacts the ring gasket, the sealing between the inclined outer wall of the ring gasket and the inclined inner wall of the trapezoidal groove is easily damaged, and therefore the sealing effect of the ring gasket is failed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an octagon pad, fill the cavity that forms between the tip of ring pad body and the inner wall of dovetail groove through the rubber pad, prevent that high-pressure medium from destroying the leakproofness between ring pad body and the flange, make the ring pad body possess lasting reliable leakproofness.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides an octagonal cushion, is ring pad body between the annular dovetail groove including setting up on two flanges, and the opening width in dovetail groove is greater than the tank bottom width, be formed with between the tip of ring pad body and the inner wall in dovetail groove and be annular cavity, the both ends of ring pad body all are provided with and are annular and with the rubber pad that the cavity is full of.

Through adopting above-mentioned technical scheme, the cavity that forms between the inner wall of the tip of rubber pad body and dovetail groove is filled to the rubber pad for the leakproofness between ring pad body and the flange is destroyed in the high pressure medium of flange medium passageway is difficult to enter into the cavity, makes the ring pad body possess lasting reliable leakproofness.

The utility model discloses further set up to: an annular cavity is arranged in the rubber pad along the circumferential direction.

Through adopting above-mentioned technical scheme, the setting of cavity can make the gas inflation in the cavity when the high temperature when playing the material effect that subtracts, and then makes the outer wall of rubber pad hug closely the inner wall of dovetail groove, improves the leakproofness of ring pad body.

The utility model discloses further set up to: a plurality of extrusion springs are arranged in the cavity along the circumferential direction, and two ends of each extrusion spring face to the bottom of the trapezoidal groove and the end of the ring pad body respectively.

Through adopting above-mentioned technical scheme, the extrusion spring makes the outer wall of rubber pad hug closely the inner wall of dovetail groove, further improves the leakproofness of ring pad body.

The utility model discloses further set up to: the cavity is filled with compressed nitrogen.

By adopting the technical scheme, the nitrogen is stable in state, does not react with rubber at a certain high temperature, and is stable filling gas.

The utility model discloses further set up to: the both ends of ring pad body have all been seted up along circumference and have been represented annular slot, the rubber pad is provided with along circumference towards the one end of ring pad body and is represented annular insert ring, insert the ring grafting and cooperate in the slot.

Through adopting above-mentioned technical scheme, the rubber pad of being convenient for is followed the dismouting on the ring pad body with the setting of inserting the ring to the slot.

The utility model discloses further set up to: insert and be annular arch along circumference on the outer circumferential wall of ring, the slot inner wall is provided with along circumference and is annular and with protruding joint complex recess.

Through adopting above-mentioned technical scheme, the cooperation of arch and recess prevents that the rubber pad from droing from the ring pad body.

The utility model discloses further set up to: the cross section of the bulge is semicircular.

Through adopting above-mentioned technical scheme, bellied cross-section semicircular in shape is convenient for insert the ring and break away from the slot.

The utility model discloses further set up to: the rubber pad is made of silicon rubber.

By adopting the technical scheme, the silicone rubber has good high temperature resistance and oil resistance, can keep longer service life in a high-temperature environment, and can be used for an oily medium.

To sum up, the beneficial effects of the utility model are that:

the rubber pad fills the cavity that forms between the inner wall of tip and the dovetail groove of ring pad body for the leakproofness between ring pad body and the flange is destroyed to the cavity is difficult to enter into to the high-pressure medium in the flange medium passageway, makes the ring pad body possess lasting reliable leakproofness.

Drawings

Fig. 1 is a schematic partial cross-sectional view of the present invention;

fig. 2 is an enlarged schematic view at a in fig. 1.

Reference numerals: 1. a flange; 11. a chamber; 12. a trapezoidal groove; 2. a ring pad body; 21. a slot; 22. a groove; 3. a rubber pad; 31. a cavity; 32. inserting a ring; 321. a protrusion; 4. compressing the spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses an octagonal cushion, as shown in fig. 1 and 2, the octagonal cushion comprises a ring cushion body 2 arranged between annular trapezoidal grooves 12 on two flanges 1, the opening width of the trapezoidal grooves 12 is greater than the groove bottom width, and an annular chamber 11 is formed between the end of the ring cushion body 2 and the inner wall of the trapezoidal groove 12. The two ends of the ring pad body 2 are provided with annular rubber pads 3 which fill the cavity 11, and the rubber pads 3 are made of silicon rubber. An annular cavity 31 is arranged in the rubber pad 3 along the circumferential direction, and compressed nitrogen is filled in the cavity 31. A plurality of extrusion springs 4 are fixedly connected to the cavity 31 along the circumferential direction, and two ends of each extrusion spring 4 face the bottom of the trapezoidal groove 12 and the end of the ring pad body 2 respectively.

As shown in fig. 1 and 2, the two ends of the ring pad body 2 are both provided with an annular slot 21 along the circumferential direction, one end of the rubber pad 3 facing the ring pad body 2 is integrally formed with an annular insert ring 32 along the circumferential direction, and the insert ring 32 is inserted into the slot 21 in a fitting manner. An annular protrusion 321 is integrally formed on the outer circumferential wall of the insert ring 32 along the circumferential direction, the cross section of the protrusion 321 is semicircular, an annular groove 22 which is in clamping fit with the protrusion 321 is integrally formed on the inner wall of the slot 21 along the circumferential direction, and a gap for the protrusion 321 to enter is formed between the outer wall of the insert ring 32 and the inner wall of the slot 21.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides an octagon cushion, is ring pad body (2) between annular dovetail groove (12) including setting up on two flanges (1), the opening width of dovetail groove (12) is greater than the tank bottom width, be formed with between the tip of ring pad body (2) and the inner wall of dovetail groove (12) and be annular cavity (11), its characterized in that: the two ends of the ring pad body (2) are respectively provided with a rubber pad (3) which is annular and is filled with the cavity (11).

2. The octagonal mat of claim 1, wherein: an annular cavity (31) is arranged in the rubber pad (3) along the circumferential direction.

3. The octagonal mat of claim 2, wherein: a plurality of extrusion springs (4) are arranged in the cavity (31) along the circumferential direction, and two ends of each extrusion spring (4) face towards the bottoms of the trapezoidal grooves (12) and the end of the ring pad body (2) respectively.

4. The octagonal mat of claim 2, wherein: the cavity (31) is filled with compressed nitrogen.

5. The octagonal mat of claim 1, wherein: the ring gasket is characterized in that two ends of the ring gasket body (2) are provided with annular slots (21) along the circumferential direction, one end of the rubber gasket (3) facing the ring gasket body (2) is provided with annular inserting rings (32) along the circumferential direction, and the inserting rings (32) are inserted into the slots (21) in a matching mode.

6. The octagonal mat of claim 5, wherein: be provided with along circumference on the outer circumferential wall of insert ring (32) and be annular arch (321), slot (21) inner wall is provided with along circumference and is annular and with protruding (321) joint complex recess (22).

7. The octagonal mat of claim 6, wherein: the cross section of the bulge (321) is semicircular.

8. The octagonal mat of claim 1, wherein: the rubber pad (3) is made of silicon rubber.

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