CN208871058U - A kind of compensatory high-temperature sealing valve and sealing system - Google Patents

Abstract

The utility model relates to machinery equipment field, in particular to a kind of compensatory high-temperature sealing valve and sealing system.The compensatory high-temperature sealing valve includes valve body, valve seat, drawing device and seal assembly, and valve seat is fixedly connected with the valve body, and drawing device is connect with valve body slides；Seal assembly includes first seal and second seal, first seal is connect with valve seat, second seal is connect with drawing device, one in first seal and second seal is an annular thin wall cylinder, when drawing device is slided to valve seat, first seal can be sealed against with second seal, when abutting, compensatory elastic deformation occurs for the thin-walled of annular thin wall cylinder, can provide outstanding sealing performance under the high temperature conditions.The sealing system includes above-mentioned compensatory high-temperature sealing valve, can reach sealing under the high temperature conditions.

Description

A kind of compensatory high-temperature sealing valve and sealing system

Technical field

The utility model relates to machinery equipment field, in particular to a kind of compensatory high-temperature sealing valve and sealing System.

Background technique

The sealing technique of room temperature lower sealing valve is very mature already, however, the sealing performance of the sealing valve under hot conditions But various difficulties are encountered, although conception proposed many schemes, is all unable to undergo many experiments, is unable to satisfy requirement.

Given this special to propose the application.

Utility model content

The purpose of this utility model is to provide a kind of compensatory high-temperature sealing valves, can provide under the high temperature conditions excellent Elegant sealing performance.

The another object of the utility model is to provide a kind of sealing system, which can reach under the high temperature conditions At sealing.

The embodiments of the present invention are achieved in that

A kind of compensatory high-temperature sealing valve comprising valve body, valve seat, drawing device and seal assembly, valve seat and valve body It is fixedly connected, drawing device is connect with valve body slides, and drawing device is in sliding process close to or far from valve seat；Seal assembly packet First seal and second seal are included, first seal is connect with valve seat, and second seal is connect with drawing device, and first is close One in sealing and second seal is an annular thin wall cylinder, and when drawing device is slided to valve seat, first seal can be with Second seal seals against, and when abutting, compensatory elastic deformation occurs for the thin-walled of annular thin wall cylinder.

In the utility model preferred embodiment, drawing device includes valve rod and spool, and spool is a solid circular plate, valve Body offers a through-hole far from one end of valve seat, and valve rod passes through through-hole and is slidably matched with through-hole, and valve rod is located at valve intracorporal one It end and is connect at solid circular plate center, drawing device can be along valve rod extending direction in sliding in valve body.

In the utility model preferred embodiment, first seal is annular thin wall cylinder, and annular thin wall cylinder is separate One end of valve seat is inwardly collapsed, and the opposite other end is connect with valve seat.

In the utility model preferred embodiment, second seal is the annulus matched with annular thin wall cylinder, circle Ring is tightly connected close to the one end in the center of circle and spool week end, when drawing device is slided to valve seat, the one end of annulus far from the center of circle It can be sealed against with inner wall one end of annular thin wall cylinder.

In the utility model preferred embodiment, first seal is the annulus matched with annular thin wall cylinder, circle Ring is connect far from the one end in the center of circle with valve seat.

In the utility model preferred embodiment, second seal is annular thin wall cylinder, and annular thin wall cylinder is close One end of valve seat is inwardly collapsed, and the opposite other end is connect with seal spool；When drawing device is slided to valve seat, annulus is close The one end in the center of circle can be sealed against with outer wall one end of annular thin wall cylinder.

In the utility model preferred embodiment, the material of annulus is abrasion-resistant stee, it is preferable that material is built-up welding 414-S； The material of annular thin wall cylinder is stainless steel, it is preferable that material 0Cr18Ni9Ti.

In the utility model preferred embodiment, valve body is provided with air inlet and air outlet, and valve seat is provided with valve body One end of air inlet is fixedly connected, when drawing device is sealed against to valve seat sliding, first seal and second seal, into Port closing.

In the utility model preferred embodiment, valve body further includes position-limiting drum, the internal diameter of position-limiting drum and the outer diameter of valve rod Match, position-limiting drum is sheathed on valve rod, and position-limiting drum is connect far from one end of spool with valve body.

A kind of sealing system comprising the above-mentioned compensatory high-temperature sealing valve of any one.

The beneficial effect of the utility model embodiment is: the utility model provides a kind of compensatory high-temperature sealing valve, Compensatory elastically-deformable annular thin wall cylinder can occur by setting, outstanding sealing can be provided under the high temperature conditions Performance.Another object is to provide a kind of sealing system, which can reach sealing under the high temperature conditions.

Detailed description of the invention

It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.

Fig. 1 is cross-sectional view of the structure when the compensatory high-temperature sealing valve that the utility model first embodiment provides seals；

Fig. 2 is cross-sectional view of the structure when the compensatory high-temperature sealing valve that the utility model first embodiment provides is opened；

Fig. 3 is the compensatory high-temperature sealing valve first seal and second seal that the utility model first embodiment provides Partial enlarged view at abutting；

Fig. 4 is cross-sectional view of the structure when the compensatory high-temperature sealing valve that the utility model second embodiment provides seals；

Fig. 5 is cross-sectional view of the structure when the compensatory high-temperature sealing valve that the utility model second embodiment provides is opened.

Icon: the compensatory high-temperature sealing valve of 1-；10- valve body；20- valve seat；30- drawing device；40- seal assembly；101- Gas outlet；102- air inlet；103- through-hole；104- position-limiting drum；301- valve rod；302- spool；401- annular thin wall cylinder； 402- annulus.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.

Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the range of the utility model protection.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or The utility model product using when the orientation or positional relationship usually put, be merely for convenience of description the utility model and letter Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and Operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for area Divide description, is not understood to indicate or imply relative importance.

In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical" It has to fully horizontally, but can be slightly tilted.

In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition Solve the concrete meaning of above-mentioned term in the present invention.

Below by specific embodiment and in conjunction with attached drawing, the utility model is further described in detail.Do not conflicting In the case where, the feature in following embodiment and embodiment can be combined with each other.

First embodiment

Please referring to Fig. 1, Fig. 2, the utility model embodiment provides a kind of compensatory high-temperature sealing valve 1, including valve body 10, Valve seat 20, drawing device 30 and seal assembly 40, valve seat 20 are fixedly connected with valve body 10, and drawing device 30 and valve body 10 are sliding Dynamic connection；Valve body 10 is provided with air inlet 102 and gas outlet 101, and valve seat 20 is set in air inlet 102, and the center is vertical In lead to, and its Zhou Duanyu valve body 10 is provided with one end sealing of 102 inner wall of air inlet even part, drawing device 30 is one air-locked Solid device is set to the surface of valve seat 20, and close to or far from valve seat 20 in sliding process；Seal assembly 40 includes Annular thin wall cylinder 401 and annulus 402, annular thin wall cylinder 401 and valve seat 20 are tightly connected, annulus 402 and drawing device 30 It is tightly connected, when drawing device 30 is slided to valve seat 20, thin-walled inner surface one end of annular thin wall cylinder 401 can be with annulus 402 Outer surface one end seals against, and when abutting, compensatory elastic deformation can occur for the thin-walled of annular thin wall cylinder 401, under this state, Above-mentioned compensatory high-temperature sealing valve 1 is fully sealed.

Specifically, the valve body 10 is a staving with internal cavities, lower end offers air inlet 102, and left end is opened Equipped with gas outlet 101, air inlet 102, gas outlet 101 are and connects with the internal cavities.Extraneous gas be only capable of by air inlet 102 into Enter, be finally discharged from gas outlet 101 via internal cavities, form smooth gas circulation, valve body 10 removes air inlet 102 and outlet Part outside mouth 101 is completely closed, and thoroughly avoids gas leakage pressure release.

Further, valve seat 20 is connect with one end that valve body 10 is provided with air inlet 102, and valve seat 20 is with thickness The inner surface of annular, air inlet 102 is a cylindrical surface, and the outer diameter of valve seat 20 is identical as the internal diameter of air inlet 102, and valve seat 20 is separate The one end in the center of circle and the peripheral wall of air inlet 102 seal against, and are fixedly connected with valve body 10, so that between valve seat 20 and valve body 10 There is no the gap of any gas leakage, gas can only be entered by air inlet 102, and be entered in valve body 10 by the inner ring of valve seat 20.

Further, 10 upper end of valve body offers through-hole 103, and through-hole 103 is located at the surface at 20 center of valve seat, pull dress 30 one end are set across through-hole 103, to realize being slidably connected for drawing device 30 and valve body 10, the opposite other end is located at valve Inside body 10, it can be slided with 10 inside of valve body along the direction close to or far from air inlet 102.

Specifically, drawing device 30 includes valve rod 301 and spool 302,301 one end of valve rod passes through through-hole 103 and and valve body 10 formation are slidably connected, and the opposite other end is located in valve body 10；Spool 302 is a solid circular plate, at 302 center of spool with One end that valve rod 301 is located in valve body 10 is fixedly connected, and straight line hangs down where 302 place plane of spool and 301 extending direction of valve rod Directly, so that integral drawing device 30 is at inverse-T-shaped, for drawing device 30 when sliding in valve body 10, spool 302 passes through valve rod 301 Be pushed closer to or far from air inlet 102.

Further, valve body 10 further includes position-limiting drum 104, and the diameter of the internal diameter and valve rod 301 of position-limiting drum 104 matches. Position-limiting drum 104 is sheathed on vertically on valve rod 301, and one end far from spool 302 is fixedly connected with valve body 10, thus to valve rod 301 glide direction is defined, and valve rod 301 is made to be only capable of sliding along the vertical direction.

It should be noted that the interior electrical path length of valve seat 20 is greater than the diameter length of spool 302, valve rod 301 is vertically arranged at Surface at 20 center of valve seat, so that when valve rod 301 is slided to 102 direction of air inlet vertically with movable valve plug 302, spool 302 can pass through from the inner ring of valve seat 20.

Further, annular thin wall cylinder 401 is vertically arranged in air inlet 102, the upper end outer diameter and 20 internal diameter of valve seat It is identical, so that the upper end is contained in 20 inner ring of valve seat just.Further, 401 upper end lateral wall one of annular thin wall cylinder End is fixedly connected with valve seat 20 close to the one end in the center of circle, so that annular thin wall cylinder 401 is fixed on vertically at air inlet 102.

Further, 401 lower end of annular thin wall cylinder is inwardly collapsed, its bottom diameter is made to be less than the diameter of spool 302, Spool 302 slides under the drive of valve rod 301 to the direction of air inlet 102, and then enters from the upper end of annular thin wall cylinder 401 Inside thin-wall barrel, since 401 bottom diameter of annular thin wall cylinder is less than the diameter of spool 302, if spool 302 continues downwards Sliding, will be abutted inside the lower end barrel of annular thin wall cylinder 401, since spool 302 is a solid circular plate, gas without Method enters in valve body 10 through spool 302, and when abutting inside spool 302 and annular thin wall cylinder 401, gas only can be by abutting The gap at place enters in valve body 10.

Further, Fig. 1, Fig. 3 are please referred to, the internal diameter of annulus 402 is identical as the diameter of spool 302, and annulus 402 is sheathed on The Zhou Duan of spool 302, and be sealedly and fixedly connected with its week end, i.e., gas can not be flowed via the junction of annulus 402 and spool 302 It crosses.When under drive of the spool 302 in valve rod 301 to the direction of air inlet 102 slide, from the upper end of annular thin wall cylinder 401 into After entering thin-wall barrel inside, if spool 302 continues slide downward, the one end of annulus 402 far from the center of circle will replace spool 302 It is abutted with inside the lower end barrel of annular thin wall cylinder 401, and seamless at abutting, therefore, air inlet 102 will be closed.

With further reference to Fig. 3, the one end of annulus 402 far from the center of circle is smooth arc transition, it is preferable that it is disc mistake It crosses, at this point, the two is line contact when annulus 402 is abutted with annular thin wall cylinder 401, contact line is circle, circle place Plane is perpendicular to the straight line where 301 extending direction of valve rod.Line between annulus 402 and annular thin wall cylinder 401 is contacted from knot Seal abutting between the two more, thus tentatively avoid above-mentioned compensatory high-temperature sealing valve 1 seal when, gas from Air inlet 102 enters, via entering the situation in valve body 10 at the abutting of annulus 402 and annular thin wall cylinder 401.

Further, since the barrel of annular thin wall cylinder 401 is thin-walled, when annulus 402 is abutted with it, thin-walled meeting Compensatory elastic deformation occurs, so that the abutting between annulus 402 and annular thin wall cylinder 401 is more closely, thoroughly So that the gap at abutting is disappeared, prevents gas and scurried by air inlet 102；Further, when spool 302 because stress reason continue to When lower slider, the compensatory elastic deformation of annular thin wall cylinder 401 be will be further increased, so that annulus 402 and annular are thin Active force between wall cylinder 401 continues to increase with reaction force, further increases annulus 402 and supports with annular thin wall cylinder 401 The leakproofness at place is connect, so that air inlet 102 thoroughly seals.

It should be noted that metal material will necessarily generate shape because temperature is excessively high at a high temperature of 500 DEG C or so Become, in this case, the compensatory elastic deformation of above-mentioned annular thin wall cylinder 401 can effectively make up due to high temperature deformation Caused by poorly sealed problem, thoroughly solve the sealing problem of sealing valve under the high temperature conditions.

Specifically, material used in annular thin wall cylinder 401 is 0Cr18Ni9Ti in the present embodiment, which has preferable Corrosion resistance, shock resistance and high temperature resistant property, annular thin wall cylinder 401 can be made to keep its knot under high temperature environment Stability and mechanical property in terms of structure；The walled thickness of annular thin wall cylinder 401 is 3-8 millimeters, which both can guarantee Intensity can provide good elastic deformation performance again, it is preferable that with a thickness of 5 millimeters, intensity that this thickness can be optimal take into account and Elastic deformation performance.

Specifically, material used in annulus 402 is Si Taili bead welding wire 414-S or Si Taili built-up welding is welded in the present embodiment Silk one of HS114, both abrasion resistance properties with higher, high temperature resistance and corrosion resistance, so that annulus 402 with the friction of annular thin wall cylinder 401, abuts during not reason excessive wear and gas leakage, increase seal assembly 40 Access times.

The present embodiment additionally provides a kind of sealing system, which includes above-mentioned compensatory high-temperature sealing valve 1, energy It is enough to reach sealing under the high temperature conditions.

Second embodiment

Referring to figure 4., Fig. 5, the utility model embodiment provide a kind of compensatory high-temperature sealing valve 1, real with first It is essentially identical to apply compensatory high-temperature sealing valve 1 provided in example, the difference is that:

It includes valve body 10, valve seat 20, drawing device 30 and seal assembly 40, and valve seat 20 is fixedly connected with valve body 10, Drawing device 30 is slidably connected with valve body 10, and valve body 10 is provided with air inlet 102 and gas outlet 101, and valve seat 20 is set to air inlet Lead in mouthfuls 102, during the center is vertical, and its Zhou Duanyu valve body 10 is provided with one end sealing of 102 inner wall of air inlet even part, takes out Drawing device 30 be an air-locked solid device, be set to the surface of valve seat 20, and in sliding process close to or far from Valve seat 20；Seal assembly 40 includes annular thin wall cylinder 401 and annulus 402, and annular thin wall cylinder 401 and drawing device 30 seal Connection, annulus 402 and valve seat 20 are tightly connected, when drawing device 30 is slided to valve seat 20, the thin-walled of annular thin wall cylinder 401 Outer surface one end can be sealed against with 402 inner surface one end of annulus, and when abutting, the thin-walled of annular thin wall cylinder 401 can be mended The elastic deformation of repaying property, under this state, above-mentioned compensatory high-temperature sealing valve 1 are fully sealed.

The interior electrical path length of valve seat 20 is less than the diameter length of spool 302, and valve rod 301 is vertically arranged at 20 center of valve seat Surface, so that spool 302 can not be from valve seat 20 when valve rod 301 is slided to 102 direction of air inlet vertically with movable valve plug 302 Inner ring in pass through.

Specifically, annular thin wall cylinder 401 is vertically arranged in valve body 10, the diameter phase of the upper end internal diameter and spool 302 Together, make that spool 302 can be accommodated inside the upper end just.Further, 401 upper end inner sidewall one end of annular thin wall cylinder and valve Core 302 is fixedly connected far from the one end in the center of circle, so that annular thin wall cylinder 401 is fixed on vertically in valve body 10.

Further, 401 lower end of annular thin wall cylinder is inwardly collapsed, its bottom diameter is made to be less than the internal diameter of valve seat 20, valve Core 302 slides under the drive of valve rod 301 to the direction of air inlet 102, and then annular thin wall cylinder 401 is made to protrude into valve seat 20 In inner ring, since 401 upper-end inner diameter of annular thin wall cylinder is greater than the internal diameter of valve seat 20, if spool 302 continues slide downward, ring Shape thin-wall barrel 401 will be abutted with valve seat 20 close to the one end in the center of circle, and since spool 302 is a solid circular plate, gas can not Enter in valve body 10 through spool 302, when abutting inside spool 302 and annular thin wall cylinder 401, gas only can be by abutting Gap enter in valve body 10.

Further, referring to figure 4., Fig. 5, the outer diameter of annulus 402 is identical as the internal diameter of valve seat 20, and annulus 402 is set to In the inner ring of valve seat 20, and annulus 402 is sealedly and fixedly connected with valve seat 20 close to the one end in the center of circle far from center of circle one end, i.e. gas It can not be flowed through via annulus 402 and the junction of valve seat 20.When under drive of the spool 302 in valve rod 301 to the side of air inlet 102 To sliding, after protruding into annular thin wall cylinder 401 in the inner ring of valve seat 20, if spool 302 continues slide downward, annulus 402 One end close to the center of circle will replace valve seat 20 to abut with the outer perimeter wall of annular thin wall cylinder 401, and seamless at abutting, because This, air inlet 102 will be closed.

Compensatory high-temperature sealing valve 1 provided by the present embodiment, in addition to above-mentioned difference, remaining feature is implemented with first The compensatory high-temperature sealing valve 1 provided in example is identical.

The present embodiment additionally provides a kind of sealing system, which includes above-mentioned compensatory high-temperature sealing valve 1, energy It is enough to reach sealing under the high temperature conditions.

In conclusion the utility model provides a kind of compensatory high-temperature sealing valve, pass through setting annular thin wall cylinder With the annulus being matched therewith, solve the problems, such as that airtight valve can not seal closed under high-temperature condition；Under external force, the ring The side wall of shape thin-wall barrel can generate compensatory elastic deformation when abutting with annulus, so that abutting between the two fills Point sealing, though under the high temperature conditions, metal can will necessarily be in the case that deformation occurs, which can also mention For the abutting of sealing, to solve the problems, such as that airtight valve can not seal closed under high-temperature condition, it is further provided outstanding is close Sealing property.The utility model additionally provides a kind of sealing system comprising above-mentioned compensatory high-temperature sealing valve, the sealing system energy It is enough to reach sealing under the high temperature conditions.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (11)

1. a kind of compensatory high-temperature sealing valve, which is characterized in that it includes valve body, valve seat, drawing device and seal assembly, institute It states valve seat to be fixedly connected with the valve body, the drawing device is connect with the valve body slides, and the drawing device was sliding Close to or far from the valve seat in journey；The seal assembly includes first seal and second seal, the first seal It is connect with the valve seat, the second seal is connect with the drawing device, the first seal and second sealing One in part is an annular thin wall cylinder, and when the drawing device is slided to the valve seat, the first seal can be with institute It states second seal to seal against, when abutting, compensatory elastic deformation occurs for the thin-walled of the annular thin wall cylinder.

2. compensatory high-temperature sealing valve according to claim 1, which is characterized in that the drawing device includes valve rod and valve Core, the spool are a solid circular plate, and the valve body offers a through-hole far from one end of the valve seat, and the valve rod passes through institute It states through-hole and is slidably matched with the through-hole, the valve rod is located at the intracorporal one end of the valve and the solid circular plate center and connects It connects, the drawing device can be slided along the valve rod extending direction in the valve body.

3. compensatory high-temperature sealing valve according to claim 2, which is characterized in that the first seal is the annular Thin-wall barrel, the described one end of annular thin wall cylinder far from the valve seat are inwardly collapsed, and the opposite other end and the valve seat connect It connects.

4. compensatory high-temperature sealing valve according to claim 3, which is characterized in that the second seal be and the ring The annulus that shape thin-wall barrel matches, the annulus is tightly connected close to the one end in the center of circle and spool week end, when the pumping When drawing device is slided to the valve seat, the one end of the annulus far from the center of circle can be close with inner wall one end of the annular thin wall cylinder Envelope abuts.

5. compensatory high-temperature sealing valve according to claim 2, which is characterized in that the first seal be and the ring The annulus that shape thin-wall barrel matches, the one end of the annulus far from the center of circle are connect with the valve seat.

6. compensatory high-temperature sealing valve according to claim 5, which is characterized in that the second seal is the annular Thin-wall barrel, the annular thin wall cylinder are inwardly collapsed close to one end of the valve seat, and the opposite other end and the spool are close Envelope connection；When the drawing device is slided to the valve seat, the annulus can be with the annular thin wall close to the one end in the center of circle Outer wall one end of cylinder seals against.

7. compensatory high-temperature sealing valve according to any one of claims 4 to 6, which is characterized in that the material of the annulus Matter is abrasion-resistant stee, and the material of the annular thin wall cylinder is stainless steel.

8. compensatory high-temperature sealing valve according to claim 7, which is characterized in that the material of the annulus is built-up welding 414- S；The material of the annular thin wall cylinder is 0Cr18Ni9Ti.

9. compensatory high-temperature sealing valve according to claim 1, which is characterized in that the valve body is provided with air inlet and goes out Port, the valve seat are fixedly connected with one end that the valve body is provided with air inlet, when the drawing device is sliding to the valve seat When dynamic, first seal and second seal seal against, the air inlet closing.

10. compensatory high-temperature sealing valve according to claim 2, which is characterized in that the valve body further includes position-limiting drum, institute The outer diameter for stating the internal diameter and the valve rod of position-limiting drum matches, and the position-limiting drum is sheathed on the valve rod, and the position-limiting drum is remote One end from the spool is connect with the valve body.

11. a kind of sealing system, which is characterized in that it includes compensatory elevated-temperature seal described in any one of claim 1-10 Valve.