CN214662099U

CN214662099U - Sealing member, sealing assembly comprising same and sealing valve

Info

Publication number: CN214662099U
Application number: CN202120227370.4U
Authority: CN
Inventors: 王伟; 程高锋; 田川川; 王瑞星
Original assignee: Luoyang Mingyuan Petrochemical Industry Technology Co ltd
Current assignee: Luoyang Mingyuan Petrochemical Industry Technology Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-11-09
Anticipated expiration: 2031-01-27

Abstract

The utility model provides a sealing member, including its seal assembly and seal valve, the sealing member forms to be greater than the flat shape of z direction size at the size of x direction and y direction, including the inflation bag, the inflation bag constitutes the at least peripheral part of the flat shape of sealing member, including bag wall and the seal chamber body who surrounds by the bag wall, seal chamber body can fill or flow fluid medium, and the inflation bag can be when filling fluid medium, along with the increase of fluid medium filling volume, has the biggest inflation volume along the normal direction with circumference direction vertically. According to the utility model provides a sealing member, seal assembly and seal valve can make expansion bag inflation or shrink through the operation of charging into/emitting fluid medium, and effectual will seal or open with the sealed face complex disk seat of its circumference direction, valve body or pipeline isotructure, need not to form through extrusion friction and seal to reduce the probability that sealing member and disk seat, valve body or pipeline take place friction damage, and need not high manufacturing accuracy.

Description

Sealing member, sealing assembly comprising same and sealing valve

Technical Field

The utility model belongs to the technical field of the petrochemical industry and specifically relates to a sealing member for petrochemical industry field is related to. The utility model discloses still relate to seal assembly and seal valve including it.

Background

In the industrial production processes of chemical industry, oil refining, metallurgy, electric power and the like, low-pressure medium pipelines such as flue gas pipelines, ventilation pipelines and the like exist, and the pipelines are used for inputting or exhausting low-pressure media such as high-temperature flue gas, air and the like so as to be matched with the production process.

In order to open and close the pipelines, metal sealing devices suitable for high temperature are often arranged in the pipelines, and a sealing surface of a valve plate extrudes a valve seat sealing ring through a plurality of sealing devices to enable a valve seat to generate elastic force so as to achieve certain sealing specific pressure to ensure the sealing of the valve. Therefore, the precision of the sealing surfaces of the valve and the valve seat has high requirements, the processing is complex, the cost is high, and otherwise, the sealing performance is difficult to ensure. Meanwhile, in the prior art, in the process of continuously closing the valve plate, the valve plate and the sealing surface of the valve seat rub for many times, and mechanical abrasion is easy to occur, so that the sealing performance between the two sealing surfaces is reduced.

There is therefore a need for an improved sealing device to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to overcome at least partly the drawbacks of the prior art by providing a sealing member, a sealing assembly and a sealing valve comprising the same.

According to an aspect of the present invention, there is provided a sealing member formed in a flat shape having a dimension in x-direction and y-direction larger than a dimension in z-direction, comprising an expansion bag constituting at least a peripheral portion of the flat shape of the sealing member, including a bag wall and a seal cavity surrounded by the bag wall, the seal cavity being capable of being filled with or flowing out a fluid medium, the expansion bag being capable of having a maximum expansion amount in a normal direction perpendicular to a circumferential direction along with an increase in a filling amount of the fluid medium when being filled with the fluid medium.

Preferably, the side walls of the wall of the expansion bladder, generally in the xy-plane, comprise reinforcing structures for limiting the expansion of the expansion bladder in the z-direction when filled with a fluid medium.

Preferably, the reinforcing structure is a corrugated, folded, thickened or wavy structure of the side wall itself.

Preferably, the seal further comprises a flat plate disposed on at least one outer side of the two side walls of the inflatable bladder, generally in the xy-plane.

Preferably, the inflation bladder is of annular configuration, the seal further comprising a central support passing through a central aperture of the annular configuration of the inflation bladder, and parallel plates connected to the central support and disposed outwardly of the two side walls of the inflation bladder generally in the xy-plane, the inflation bladder being disposed in the gap between the parallel plates.

Preferably, an elastic structure connecting the two side walls is arranged in the sealed cavity of the expansion bladder and between the side walls in the xy plane, and is used for limiting the expansion of the expansion bladder along the z direction when the fluid medium is filled in and promoting the contraction of the expansion bladder when the fluid medium flows out.

Preferably, the seal comprises a central support plate, the inflation bladder being disposed about the periphery of the central support plate.

Preferably, a cross-section of the balloon taken in an xz-plane or a yz-plane has an elliptical shape, a major axis of the elliptical shape being coincident with the circumferential direction.

Preferably, the shape of a cross section of the balloon taken in the xz-plane or yz-plane is corrugated or wavy.

Preferably, an elastic member connected between the circumferential walls of the inflatable bladder for urging the inflatable bladder to retract when the fluid medium flows out is provided inside the sealed cavity of the inflatable bladder, and the strength of the elastic member is less than that of the elastic structure.

Preferably, the seal is constructed of an elastomeric material or a metal foil.

According to the utility model discloses a further aspect provides a seal assembly, including actuating lever and as above the sealing member, the sealing member is connected with the actuating lever in at least one side middle part on xy plane to by actuating lever drive rotation or translation, be provided with the cavity passageway in the actuating lever for set up with the fluid medium passageway of inflation bag fluid seal intercommunication.

According to the utility model discloses a still another aspect provides a seal valve, including valve body, actuating actuator and as above the seal assembly, seal assembly sets up inside the valve body, seal assembly's actuating lever can rotate or translation sealing member under the actuating actuator drive, makes it reach periphery and valve body inner wall press fit position or leave and valve body inner wall press fit position.

Preferably, the valve body further comprises a valve seat arranged on the inner wall of the valve body, and the driving rod of the sealing assembly can rotate or translate the sealing element under the driving of the driving actuating mechanism to enable the sealing element to reach the position where the periphery is in press fit with the valve seat or leave the position where the periphery is in press fit with the valve seat.

Preferably, after the sealing assembly moves to the position matched with the valve seat, the fluid medium charging and discharging device increases the amount of the charged fluid medium until the expansion bag expands along the normal direction perpendicular to the circumferential direction to press the valve seat, so that sealing is realized, and the fluid medium charging and discharging device discharges or extracts the fluid medium before the sealing assembly leaves the position matched with the valve seat.

According to the utility model provides a sealing member, seal assembly and seal valve can be through filling into/the operation of emitting fluid medium, make expansion bag inflation or shrink, because the expansion bag has the maximum inflation volume along the normal direction with circumference direction vertically, consequently can be effectual will seal or open with its circumference direction's sealed face complex disk seat, valve body or pipeline isotructure, need not to form sealedly through extrusion friction, thereby reduce the probability that sealing member and disk seat, valve body or pipeline take place friction damage, and need not high manufacturing accuracy.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments with reference to the attached drawings:

figure 1 is a side cross-sectional view of a first embodiment of a seal according to the present invention;

fig. 2 is a front view of a first embodiment of a seal according to the present invention;

figure 3 is a front view of a second embodiment of a seal according to the present invention;

figure 4 is a side cross-sectional view of a third embodiment of a seal according to the present invention;

figure 5 is a side cross-sectional view of a fourth embodiment of a seal according to the present invention;

FIG. 6 is a cross-sectional view of the inflation bladder of the embodiment shown in FIG. 5;

figure 7 is a side cross-sectional view of a fifth embodiment of a seal according to the present invention;

figure 8 is a side cross-sectional view of a sixth embodiment of a seal according to the present invention;

figure 9 is a side cross-sectional view of a seventh embodiment of a seal according to the present invention;

figure 10 is a side cross-sectional view of an eighth embodiment of a seal according to the present invention;

fig. 11 is a schematic view of a first embodiment of a seal assembly according to the present invention;

figure 12 is a schematic view of a second embodiment of a seal assembly according to the present invention;

figure 13 is a schematic view of a third embodiment of a seal assembly according to the present invention;

figure 14 is a schematic view of a fourth embodiment of a seal assembly according to the present invention;

figure 15 is a schematic view of a first embodiment of a sealing valve according to the present invention;

fig. 16 is a front view of the sealing valve shown in fig. 15;

figure 17 is a schematic view of a second embodiment of a sealing valve according to the present invention;

figure 18 is a schematic view of a third embodiment of a sealing valve according to the present invention;

figure 19 is a schematic view of a fourth embodiment of a sealing valve according to the present invention;

fig. 20 is a schematic view of a fifth embodiment of a sealing valve according to the present invention.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

In the present invention, the terms "x", "y", "z", "upper", "lower", "inner", "outer", "center", "longitudinal", "outer periphery", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, components or elements to a particular orientation or to be constructed and operated in a particular orientation.

The main principle of the utility model is that, improve prior art's valve plate for including can fill and emit fluid and to the flat sealing member of the expansion bag of peripheral extension and withdrawal, make the sealed face that constitutes by the expansion bag of valve plate and rather than do not need accurate cooperation between the sealed face and provide sealed specific pressure, but make its outside peripheral expansion extend through filling fluid in the expansion bag to the valve plate, thereby to exerting pressure rather than the sealed face of complex, realize sealed, emit through the fluid in the expansion bag, make the expansion bag withdrawal, remove sealedly, the requirement to the manufacturing accuracy of the sealed face of matched with has been reduced from this, the wearing and tearing that the valve plate caused with the extrusion of the sealed face of matched with before forming sealed in the while also avoided among the prior art.

Because the utility model discloses mainly use under the high temperature environment in the chemical industry field, the sealing member need use high temperature resistant and can be made through the material of filling fluid inflation extension and withdrawal, for example spring steel and high elasticity alloy etc. consequently according to the utility model discloses a sealing member, including its seal assembly and seal valve need have special structure. However, the sealing member of the present invention may be made of non-metal super-elastic material, such as rubber, organic polymer material, etc., regardless of the high temperature.

Embodiments of a seal, a seal assembly and a sealing valve according to the present invention will be described in detail below with reference to the accompanying drawings. In the embodiments, the same or similar components are provided with the same reference numerals, for the sake of mutual distinction, the first digit on the left in the embodiments of the seal is increased by 1 according to the embodiments, in the embodiments of the seal assembly, the reference numeral of the seal corresponds to the embodiment of the corresponding seal, the first digit on the left in the reference numerals of the other components is increased by 1 according to the embodiments, in the embodiments of the seal valve, the reference numeral of the seal assembly corresponds to the embodiment of the corresponding seal assembly, and the first digit on the left in the reference numerals of the other components is increased by 1 according to the embodiments.

Fig. 1 is a side sectional view of a first embodiment of a seal according to the present invention, and fig. 2 is a front view of a first embodiment of a seal according to the present invention. Referring also to fig. 1-2, the seal is generally indicated at 100, and the shape of the seal 100 is a flattened circular shape having a dimension in the x-direction and the y-direction greater than a dimension in the z-direction. The sealing member 100 includes an inflatable bladder 1001 therein, and the inflatable bladder 1001 includes a bladder wall 1001a and a seal cavity 1001b surrounded by the bladder wall 1001a, and the seal cavity 1001b can be filled with or drained from a fluid medium.

In this embodiment, the expansion bladder 1001 forms a main body portion of the sealing member 100, the left and right side walls are substantially in the xy plane, the right side wall includes a support plate 1002, the support plate 1002 and the expansion bladder 1001 are fixedly connected, and a fluid medium hose for filling or discharging a fluid medium can pass through the support plate 1002 to be in fluid communication with the expansion bladder 1001. The elastic ribs 1001d are further provided in the seal chamber 1001b, and when the expansion bladder 1001 is filled with the fluid medium, the amount of expansion of the expansion bladder 1001 in the z direction is restricted by the elastic ribs 1001d and the support plate 1002 as the amount of filling of the fluid medium increases, so that the expansion bladder has the maximum amount of expansion in the normal direction of the outer peripheral surface.

In this embodiment, the sealing surface of the sealing member 100 is a circumferential surface parallel to the z-direction, the sealing surface matching with the sealing member 100 is concentrically arranged with the circumferential surface of the sealing member 100, and when the fluid medium is filled, the circumferential surface of the sealing member 100 expands radially and outwardly by the limitation of the elastic ribs 1001d and the support plate 1002, so that the expansion amount is the largest, the pressure of the sealing surface matching with the sealing surface can be gradually increased along with the gradual increase of the filling amount of the fluid medium, and the sealing is realized after the sufficient specific sealing pressure is reached. When the fluid medium is discharged, released or evacuated, the circumferential surface retracts with the contraction of the sealing member 100, the volume of the sealing member 100 is reduced, the circumferential surface and the sealing surface matched with the circumferential surface are separated, and the sealing is released. It can be seen that the circumferential surface of the seal 100 eliminates moving extrusion of the mating seal surfaces prior to sealing and unsealing, reduces wear caused by the moving extrusion, and eliminates the need for precise surface mating. The fluid medium filled or discharged from the inflatable bladder may be a gas, such as air, or a liquid.

Fig. 3 is a front view of a second embodiment of a seal according to the present invention. There is shown a seal 200 and an inflatable bladder 2001, this second embodiment being similar to the first embodiment except that the inflatable bladder 2001 is rectangular in shape.

The shape of the front view of the sealing member of the present invention is not limited to the shape shown in fig. 2 and 3, and may be set to other shapes, such as an oval shape, as needed.

Fig. 4 is a side view of a third embodiment of a seal according to the present invention. The seal is generally indicated at 300 and the shape of the seal 300 is a flat shape having a dimension in the x and y directions greater than the dimension in the z direction. The sealing member 300 includes an expansion bladder 3001 and a support plate 3002 fixedly connected to the expansion bladder 3001, and a fluid medium hose filled with or flowing out a fluid medium may be in fluid communication with the expansion bladder 3001 through the support plate 3002. The inflatable bladder 3001 comprises a bladder wall 3001a and a sealed cavity 3001b enclosed by the bladder wall 3001a, the sealed cavity 3001b being capable of being filled with or drained of a fluid medium.

In the present embodiment, the inflation bladder 3001 constitutes a main body portion of the seal member 100, and a left side wall of the bladder wall 3001a, which is substantially parallel to the xy plane, substantially in the xy plane, includes a thickened portion 3001c, and a right side wall is fixedly connected to the support plate 3002. Due to the arrangement of the thickened portion 3001c and the support plate 3002, when the expansion bag 3001 is filled with the fluid medium, the amount of expansion of the expansion bag 3001 in the z direction is restricted by the thickened portion 3001c and the support plate 3002 as the filling amount of the fluid medium increases, so that it has the maximum amount of expansion outward in the normal direction of the outer peripheral surface substantially parallel to the z direction.

The present embodiment is not limited to the specific structure shown in the drawings, and the supporting plate 3002 may be replaced with a thickened structure 3001c, and the thickened structure 3001c may also be replaced with the supporting plate 3002, as long as the structure capable of restricting the expansion of the inflatable bladder 100 in the z direction is applicable to the sealed bladder structure of the present invention.

The inflatable bladders of the two embodiments shown in figures 1 to 4 are formed as integral inflatable bladders which themselves form a seal with the outer peripheral surface acting as a sealing surface and the sealing surface cooperating therewith, in the event that the strength is satisfied.

The expansion bladder according to the present invention may also be formed in a ring shape constituting only a peripheral portion of the sealing member, and an embodiment in which the expansion bladder is in a ring shape will be described below with reference to fig. 5 to 10.

Fig. 5 is a side cross-sectional view of a fourth embodiment of a seal according to the present invention. As shown in fig. 5, the seal 400 includes a center support plate 4004 and an expansion bladder 4001 disposed about the periphery of the center support plate 4004, the expansion bladder 4001 being disposed in an annular configuration. The periphery of the central support plate 4004 is an end having a width to facilitate mounting of the inflation bladder 4001 thereon, and the central support plate 4004 is configured to have a hollow cavity 4005, the hollow cavity 4005 being capable of accommodating a fluid medium hose in fluid communication with the inflation bladder 4001, the fluid medium hose being connectable to the inflation bladder 4001 through a fluid medium hose passage 4006 shown in the drawings.

Figure 6 is a cross-sectional view of the inflatable bladder of the embodiment shown in figure 5. As can be seen in fig. 6, the cross-section of the inflation bladder 4001 has a flattened oval shape, which is connected to a central support plate 4004 (see fig. 5) by a bladder wall 4001a in the minor axis direction, including a sealed cavity 4001b surrounded by the bladder wall 4001a and the bladder wall 4001 a.

Due to the cross section of the expansion bladder 4001 in a flattened oval shape, in the case where the wall thickness of the expansion bladder 4001 is uniform, when the fluid medium is filled into the seal cavity 4001b, the amount of expansion of the expansion bladder 4001 in the short axis direction, i.e., the y-axis direction in the drawing, is larger than the amount of expansion of the expansion bladder 4001 in the long axis direction, i.e., the x-axis direction in the drawing, i.e., the expansion bladder 4001 has the maximum amount of expansion in the y-axis direction, which can be obtained by force analysis of the oval cross section.

The cross-section of the inflation bladder 4001 is not limited to the flat oval shape shown in the drawings, and may be a non-circular shape having an aspect ratio greater than 1.5, such as an oblong shape.

Figure 7 is a cross-sectional view of an inflatable bladder of a fifth embodiment of a sealing member according to the present invention. The seal of the fifth embodiment is similar to the fourth embodiment in that it includes a center support plate and an expansion bladder disposed about the periphery of the center support plate, the expansion bladder being disposed in an annular configuration.

While only a cross-sectional view of the inflatable bladder is shown in fig. 7, it can be seen from fig. 7 that the cross-section of the inflatable bladder 5001 has a flattened oval shape and includes a bladder wall 5001a and a sealed cavity 5001b enclosed by the bladder wall 5001 a. Also provided in the sealed cavity 5001b is an arcuate support plate 5001d connecting the bladder walls 5001a of the inflatable bladder 5001 in a generally major axis direction, i.e., z-axis direction in the drawing, the arcuate support plate 5001d being resilient and bendable such that when a fluid medium is filled into the sealed cavity 5001b, the inflatable bladder 5001 has a maximum amount of expansion in a minor axis direction, i.e., y-axis direction in the drawing, due to the elliptical cross-section of the inflatable bladder 5001, and the amount of expansion of the inflatable bladder 5001 in the major axis direction, i.e., x-axis direction in the drawing, is limited, thereby increasing the degree of bending of the arcuate support plate 5001 d. As the fluid medium within the inflatable balloon 5001 exits, the degree of curvature of the curved support plates 5001d is restored, causing the inflatable balloon 5001 to expand in the direction of the long axis, i.e., the y-axis in the figure, and facilitating retraction of the inflatable balloon 5001.

The arc support plate 5001d may be a one-piece plate or a multi-piece plate.

Fig. 8 is a side view of a sixth embodiment of a seal according to the present invention. The seal of the sixth embodiment is similar to the fourth embodiment in that it includes a center support plate and an expansion bladder disposed about the periphery of the center support plate, the expansion bladder being disposed in an annular configuration.

Only a cross-sectional view of the bladder is shown in fig. 8, generally indicated at 6001, comprising a bladder sidewall 6001a, a bladder bottom wall 6001f, a sealing surface 6001d, and a sealed chamber 6001b surrounded by the bladder sidewall 6001a, the bladder bottom wall 6001f, and the sealing surface 6001d, into or out of which fluid medium can flow. The bag side wall 6001a is formed in a corrugated shape, which corresponds to a reinforcing structure that reinforces the strength of the bag side wall 6001a, so that the inflatable bag 6001 can restrict the amount of inflation of the bag side wall 6001a when filled with the fluid medium, with an increase in the amount of filling of the fluid medium, so as to have the maximum amount of inflation in the y direction of the position shown in the figure, which is the normal direction perpendicular to the circumferential direction, i.e., the normal direction of the sealing surface 6001 d.

When the inflatable bladder 6001 is made of a high temperature resistant material for high temperature applications, the high temperature resistant material has relatively poor resilience, and when the fluid medium in the inflatable bladder 6001 flows out, in order to facilitate retraction of the inflatable bladder 6001, an elastic member 6001e may be disposed in the sealed cavity 6001d along the y-direction in the figure, so that the sealed surface 6001d and the bladder side wall 6001a of the inflatable bladder 6001 can be retracted by the resilience of the elastic member 6001 e. The elastic member 6001e is not necessary, and its elastic modulus should not restrict the expansion of the inflatable bladder 6001 in the y-direction.

The structure of the expansion bag in the sixth embodiment has larger elastic displacement and the performance of pressure relief and original shape recovery.

Fig. 9 is a side view of a seventh embodiment of a seal according to the present invention. The seal of the seventh embodiment is similar to the fourth embodiment in that the seal includes a center support plate and an expansion bladder disposed about the periphery of the center support plate, the expansion bladder being disposed in an annular configuration.

Only a sectional view of the inflatable bladder is shown in fig. 9, in which the inflatable bladder is generally designated as 7001 and includes a bladder side wall 7001a, a bladder bottom wall 7001f, a sealing surface 7001d, and a sealed chamber 7001b surrounded by the bladder side wall 7001a, the bladder bottom wall 7001f, and the sealing surface 7001d, and a fluid medium can be filled into or flowed out of the sealed chamber 7001 b. The bag side wall 7001a is formed in a corrugated shape which corresponds to a reinforcing structure that reinforces the strength of the bag side wall 7001a, so that the inflatable bag 7001 can restrict the amount of expansion of the bag side wall 7001a so as to have the maximum amount of expansion in the y-direction of the position shown in the figure, in the normal direction perpendicular to the circumferential direction, i.e., the normal direction of the sealing surface 7001d, as the amount of fluid medium charged increases, when the inflatable bag 7001 is charged with fluid medium.

The inflation bag 7001 has a general structure similar to that of the inflation bag 6001, except that an arc support plate 7001d parallel to the z direction is provided in the inflation bag 7001, and the arc support plate 7001d has elasticity and is capable of bending. When a fluid medium is filled into the sealed chamber 7001b, the expansion of the expansion bag 7001 in the z-axis direction in the figure is restricted due to the corrugated shape of the side wall 7001a of the expansion bag 7001, so that the expansion bag 7001 has the maximum expansion amount in the y-axis direction in the figure when the arc-shaped support plate 7001d has a certain curvature. When the fluid medium in the expansion bladder 7001 flows out, the curvature of the arc-shaped support plate 7001d is restored, so that the side wall 7001a of the expansion bladder 7001 is expanded in the y-axis direction, and the expansion bladder 7001 is urged to retract in the z-axis direction.

To facilitate retraction of the inflation bladder 7001, both the elastic member and the arcuate support plate 7001d may be disposed within the sealed chamber 7001d, the elastic member and the arcuate support plate 7001d being capable of simultaneously facilitating retraction of the inflation bladder 7001 in the z-direction.

The structure of the expansion bag in the seventh embodiment has a larger elastic displacement and the performance of pressure relief and original shape recovery.

Fig. 10 is a side cross-sectional view of an eighth embodiment of a seal according to the present invention, generally designated 800, comprising an inflation bladder 8001 of annular configuration, a central support member 8003 passing through the central aperture of the annular configuration of the inflation bladder, and clamp plates 8002 connected to the central support member 8003 disposed outwardly of both side walls of the inflation bladder 8001, generally in the xy-plane direction, the inflation bladder 8001 being disposed in the gap between the clamp plates 8002. A fluid media hose in fluid communication with the inflation bladder 8001 may be connected to the inflation bladder 8001 through the central support member 8003. When the inflation bladder 8001 is filled with fluid medium, the clamp plate 8002 limits the amount of inflation of the inflation bladder 8001 in the z-direction shown in the drawing to be maximum in the xy-plane.

The present invention further provides a sealing assembly including the above sealing member, and the sealing assembly provided by the present invention will be described with reference to fig. 10 and 11.

Fig. 11 is a schematic view of a first embodiment of a seal assembly according to the present invention. The present invention provides a seal assembly, generally indicated at 10, the seal assembly 10 comprising a drive rod 101 and a seal 100 disposed on the left side of the drive rod 101 in the figure, the seal 100 being connected to the drive rod 101 at the middle of a support plate 1002 that is generally parallel to the xy-plane. The seal 100 is the seal 100 of the first embodiment of the seal.

In this embodiment, the driving rod 101 drives the sealing member 100 to rotate when being pivoted around its axis or moved along the axis, thereby realizing sealing or unsealing of the sealing surface engaged therewith.

The drive rod 101 may be provided with a hollow channel 1010. In the case of a hollow channel 1010, a fluid media hose 1011 in fluid-tight communication with the bladder 1001 may be disposed within the hollow channel 1010 to minimize the fluid media hose 1011 from interfering with the movement of the seal 100 during rotation or movement of the seal 100.

Fig. 12 is a schematic view of a second embodiment of a seal assembly according to the present invention. The utility model provides a seal assembly generally is shown at 20, and seal assembly 20 includes actuating lever 201 and the sealing member 100 of setting in the actuating lever 201 left and right sides in the figure, and sealing member 100 is connected with actuating lever 201 respectively in the backup pad 1002 middle part that is on a general parallel with xy plane. The seal 100 is the seal 100 of the first embodiment of the seal.

The drive rod 201 may be provided with a hollow channel 2010. In the case of a hollow channel 2010, a fluid medium hose 2011 in fluid communication with the inflation bladder 1001 may be disposed within the hollow channel 2010 to avoid as much as possible of the fluid medium hose 2011 interfering with the movement of the seal 100 during rotation or movement of the seal 100.

In this embodiment, the driving rod 201 drives the sealing members 100 connected to the left and right sides thereof at the same time, so that the sealing assembly 20 can provide double sealing, which can further improve the sealing reliability.

Fig. 13 shows a third embodiment of a seal assembly according to the present invention. The present invention provides a seal assembly, generally indicated at 30, the seal assembly 30 including a drive rod 301 and a seal 400 disposed on the left side of the drive rod 301 in the figure, the seal 400 being connected to the drive rod 301 at the middle of the center support plate 4004. The seal 400 is the seal 400 of the fourth embodiment of the seal.

The other parts are similar to the first embodiment of the sealing assembly according to the invention and will not be described in detail.

Fig. 14 shows a fourth embodiment of a seal assembly according to the present invention. The utility model provides a seal assembly is generally indicated at 40, and seal assembly 40 includes actuating lever 401 and sets up the left sealing member 800 of actuating lever 401 in the figure, and sealing member 800 is connected with actuating lever 401 in splint 8002 middle part. The seal 800 is the seal 800 in the eighth embodiment of the seal.

The drive rod 401 may be provided with a hollow channel 4010. With hollow passage 4010, a fluid media hose 4011 in fluid communication with inflation bladder 8001 can be disposed in hollow passage 4010 and connected to inflation bladder 4001 through clamp plate 8002.

The seal in the seal assembly according to the present invention is not limited to that shown in fig. 11 to 14, and may be the seal according to any of the embodiments of the present invention described above.

A sealing valve according to the invention will now be described with reference to fig. 15 to 20, the sealing assembly shown in fig. 11 to 14 corresponding to a cartridge of the sealing valve.

Fig. 15 is a side view of a first embodiment of a sealing valve according to the present invention, and fig. 16 is a front view of the sealing valve shown in fig. 15 when open. Referring to fig. 15 and 16 together, a sealing valve body is shown at 1, the sealing valve 1 comprising a valve body 11, an actuator 12 and the seal assembly 10 described above. The seal assembly 10 is disposed inside the valve body 11, and the driving rod 101 of the seal assembly 10 passes through the mounting hole of the valve body 11 to be connected to the driving actuator 12, and is capable of rotating the seal 100 under the driving of the driving actuator 12. When the sealing element 100 reaches a position of press-fitting engagement with the inner wall 110 of the valve body 11, the expansion bladder 1001 is filled with a fluid medium and expanded, so that the sealing element 100 can close the valve body 11. When it is desired to unseal, the fluid medium in the bladder 1001 flows to cause it to contract, thereby unsealing, and the seal 100 of the seal assembly 10 may then be rotated by the actuator 12 through an angle, which may be greater than zero and equal to or less than 90 degrees, away from a press-fit engagement with the valve body 11, thereby opening the valve body 11. The maximum open position of seal 100 rotated 90 degrees is shown in fig. 16.

As is apparent from the above description, in both the sealing and unsealing processes of the sealing valve 1, there is no relative frictional movement of the sealing surface of the seal member 100 and the inner wall 110 of the valve body 11 while being pressed, and therefore, abrasion of the seal member 100 and the inner wall 110 is avoided, and the manufacturing accuracy in forming a seal by the pressing movement is not required.

In the present embodiment, the drive actuator 12 is a rotary motor device, and the sealing valve 1 may be a butterfly valve, for example.

The expansion bladder 1001 is filled or discharged with a fluid medium through a fluid filling and discharging device 13 provided at a lower end of the driving rod 101 of the sealing assembly 100. The fluid charging and discharging device 13 communicates with one end of a fluid medium hose 1011 provided in the hollow passage 1010 of the drive rod 101, and the other end of the fluid medium hose 1011 communicates with the inflatable bladder 1001. The fluid medium hose 1011 may be a metal hose, various rubber hoses, or the like. The drive rod 101 may be a tubular metal member. The fluid medium charging and discharging device 13 may be various types of fluid pumps for pumping fluid, and can realize the charging, pressure regulation, pressure maintaining, pressure relief and evacuation of the elastic expansion bladder according to the requirements.

The sealing valve 1 further includes a sealing material 14 provided between the drive rod 101 and the mounting hole on the valve body 11, and a sealing gland 15 provided on the fluid medium playback device 13 to ensure effective sealing and support of the drive rod 101.

Figure 17 is a side cross-sectional view of a second embodiment of a sealing valve according to the present invention. In this embodiment, the sealing valve body is denoted by 2, the sealing valve 2 comprising a valve body 21, an actuator 22, a valve seat 24 and the above-mentioned sealing assembly 10. The seal assembly 10 is disposed inside the valve body 21, and the driving rod 101 of the seal assembly 10 passes through the mounting hole of the valve body 21 and is connected to the driving actuator 22, so that the seal 100 can be rotated under the driving of the driving actuator 22. When the seal 100 reaches a position of press-fit engagement with the valve seat 24, the bladder 1001 is inflated with a fluid medium to expand it, thereby allowing the seal 100 to effect closure of the valve seat 24. When it is desired to unseal, the fluid medium in the bladder 1001 flows to contract, thereby unsealing, and the seal 100 of the seal assembly 10 may then be rotated by the actuator 22 through an angle, which may be greater than zero and less than or equal to 90 degrees, out of a press-fit engagement with the valve seat 24, thereby opening the valve body 21.

The expansion bladder 1001 is filled or discharged with a fluid medium through a fluid charge and discharge device 23 provided at a lower end of the driving rod 101 of the sealing assembly 10. The fluid charging and discharging device 23 communicates with one end of a fluid medium hose 1011 provided in the hollow passage 1010 of the drive rod 101, and the other end of the fluid medium hose 1011 communicates with the inflatable bladder 1001.

The second embodiment of the sealing valve differs from the first embodiment only in that the sealing valve 2 further comprises a valve seat 24, the sealing member 100 cooperating with the valve seat 24 to effect opening and closing of the sealing valve 2. The other structures are the same as those of the first embodiment, and will not be described in detail.

Figure 18 is a side cross-sectional view of a third embodiment of a sealing valve according to the present invention. In this embodiment, the sealing valve body is denoted by 3, and the sealing valve 3 comprises a valve body 31, an actuator 32, a valve seat 34 and the above-mentioned sealing assembly 20. The sealing assembly 20 is disposed inside the valve body 31, and the driving rod 201 of the sealing assembly 20 passes through the mounting hole of the valve body 31 to be connected with the driving actuator 32, so as to rotate the sealing member 100 under the driving of the driving actuator 32. When the seal 100 reaches a position of press-fitting engagement with the valve seat 34, the bladder 1001 is inflated with a fluid medium so as to expand it, thereby enabling the seal 100 to close the valve seat 34. When it is desired to unseal, fluid medium in the bladder 1001 flows to cause it to contract, thereby unsealing, and the seal assembly 20 may then be rotated by the actuator 32 from its compressed engagement with the valve seat 34 through an angle, which may be greater than zero and less than or equal to 90 degrees, to open the valve body 31.

The inflation bladder 1001 is filled or discharged with a fluid medium through a fluid filling and discharging device 33 provided at a lower end of the driving rod 201 of the sealing assembly 20. The fluid charge and discharge device 33 communicates with one end of a fluid medium hose 2011 provided in the hollow passage 2010 of the drive rod 201, and the other end of the fluid medium hose 2011 communicates with the inflation bladder 1001.

The third embodiment of the sealing valve of the present invention differs from the second embodiment only in that the sealing assembly 20 comprises two sealing members 100, and the valve body 31 is provided with valve seats 34 respectively engaged with the two sealing members 100. The other structures are the same as those of the second embodiment, and are not described in detail.

Figure 19 is a side cross-sectional view of a fourth embodiment of a sealing valve according to the present invention. In this embodiment, the sealing valve body is denoted by 4, and the sealing valve 4 comprises a valve body 41, an actuator 42, a valve seat 44 and the above-mentioned sealing assembly 30. The sealing assembly 30 is arranged inside the valve body 41, and the driving rod 301 of the sealing assembly 30 passes through the mounting hole on the valve body 41 to be connected with the driving actuator 42, and can rotate the sealing member 400 under the driving of the driving actuator 42. When the seal 400 reaches a position of press-fitting with the valve seat 44, the expansion bladder 4001 mounted on the periphery of the support plate 4004 is filled with a fluid medium to expand, thereby enabling the seal 400 to close the valve seat 44. When it is desired to unseal, fluid medium in the expansion bladder 4001 flows to contract, thereby unsealing, and then the seal assembly 30 may be rotated by the drive actuator 42 through an angle, which may be an angle greater than zero and equal to or less than 90 degrees, out of press-fit engagement with the valve seat 44, thereby opening the valve body 41.

The inflation bladder 4001 is inflated or deflated with a fluid medium by a fluid inflation and deflation device 43 provided at the lower end of the driving rod 301 of the sealing assembly 30. The fluid charge and discharge device 43 communicates with one end of a fluid medium hose 3011 provided in the hollow passage 3010 of the drive lever 301, and the other end of the fluid medium hose 3011 communicates with the inflation bladder 4001.

The fourth embodiment of the sealing valve of the present invention differs from the second embodiment only in the difference of the sealing assembly 30. The other structures are the same as those of the second embodiment, and are not described in detail.

Fig. 20 is a side sectional view of a fifth embodiment of a sealing valve according to the present invention. The sealing valve body is indicated with 5, the sealing valve 5 comprising a valve body 51, an actuating actuator 52, a valve seat 54 and the above-mentioned sealing assembly 40. The sealing assembly 40 is arranged inside the valve body 51, and the driving rod 401 of the sealing assembly 40 passes through the mounting hole on the valve body 51 to be connected with the driving actuator 52, so that the sealing member 800 can be rotated under the driving of the driving actuator 52. When the seal 800 reaches a position of press-fitting engagement with the valve seat 54, the inflation bladder 7001 installed between the clamp plates 8002 is inflated by a fluid medium, thereby enabling the seal 800 to achieve closure of the valve seat 54. When it is desired to unseal, fluid medium in the bladder 8001 flows to cause it to contract, thereby unsealing, and the seal assembly 40 may then be driven by the drive actuator 52 out of a press-fit position with the valve seat 54, thereby opening the valve body 51.

The inflation bladder 8001 is filled or discharged with a fluid medium through a fluid filling and discharging device 53 provided at a lower end of the driving rod 401 of the sealing assembly 40. The fluid charge and discharge device 53 communicates with one end of a fluid medium hose 4011 provided in a hollow passage 4010 of the drive rod 401, and the other end of the fluid medium hose 4011 communicates with the inflation bladder 8001.

The fifth embodiment of the sealing valve of the present invention differs from the second embodiment only in the difference of the sealing assembly 40. The other structures are the same as those of the second embodiment, and are not described in detail.

The actuating actuators of the sealing valves shown in fig. 15 to 20 all drive the sealing assembly to rotate to open and close the sealing valve, but the present invention is not limited thereto, and the actuating actuators can also drive the sealing assembly to translate to open and close the sealing valve as required, and the sealing valve thus realized can be, for example, a gate valve, a plate valve, etc.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A sealing member formed in a flat shape having a dimension in x-direction and y-direction larger than a dimension in z-direction, comprising an expansion bladder constituting at least a peripheral portion of the flat shape of the sealing member, including a bladder wall and a sealed chamber surrounded by the bladder wall, the sealed chamber being capable of being filled with or drained from a fluid medium, the expansion bladder being capable of having a maximum expansion in a normal direction perpendicular to a circumferential direction as a filling amount of the fluid medium increases when being filled with the fluid medium.

2. A sealing member according to claim 1, wherein the side walls of the bladder wall of the inflatable bladder, generally in the xy-plane, comprise reinforcing structures for limiting the expansion of the inflatable bladder in the z-direction when filled with a fluid medium.

3. The seal of claim 2, wherein the reinforcing structure is a corrugated, folded, thickened or undulating structure of the sidewall itself.

4. The seal of claim 1, further comprising a flat plate disposed on at least one outer side of two sidewalls of the inflation bladder generally in the xy-plane.

5. A sealing member according to claim 4, wherein the inflatable bladder is of an annular configuration, the sealing member further comprising a central support member extending through a central aperture of the annular configuration of the inflatable bladder, and parallel plates connected to the central support member and disposed outwardly of the two side walls of the inflatable bladder generally in the xy-plane direction, the inflatable bladder being disposed in the gap between the parallel plates.

6. A sealing member according to any of claims 1 to 3, wherein a resilient structure is provided within the sealed cavity of the bladder and between the side walls in the xy-plane to connect the two side walls, for limiting expansion of the bladder in the z-direction when filled with fluid medium and for urging retraction of the bladder when out of the fluid medium.

7. The seal of claim 6, wherein the seal includes a central support plate, the inflation bladder being disposed about a periphery of the central support plate.

8. The seal of claim 7, wherein a cross-section of the balloon taken in an xz-plane or yz-plane has an elliptical shape, a major axis of the elliptical shape being coincident with the circumferential direction.

9. The seal of claim 7, wherein a cross-section of the bladder taken in the xz-plane or yz-plane is corrugated or undulating in shape.

10. A sealing member according to claim 8 or 9, wherein an elastic member is provided inside the sealed cavity of the inflatable bladder, connected between the circumferential walls of the inflatable bladder, for urging the inflatable bladder to retract when the fluid medium flows out, the elastic member having a strength which is less than that of the elastic structure.

11. Seal according to any of claims 1-5, characterized in that the seal is composed of an elastic material or a metal foil.

12. A seal assembly comprising a drive shaft and a seal according to any one of claims 1 to 11, the seal being connected to the drive shaft centrally on at least one side of the xy plane and being driven in rotation or translation by the drive shaft, the drive shaft having a hollow passage therein for the passage of a fluid medium in fluid-tight communication with an inflatable bladder.

13. A sealing valve comprising a valve body, an actuator and a seal assembly according to claim 12, the seal assembly being disposed within the valve body, the actuator arm of the seal assembly being capable of rotating or translating the seal member into or out of a compressive engagement with the inner wall of the valve body by actuation of the actuator.

14. The sealing valve according to claim 13, wherein said valve body further comprises a valve seat disposed on an inner wall of said valve body, said actuator arm of said seal assembly being capable of rotating or translating said seal member into and out of circumferential and valve seat interference engagement upon actuation of said actuator.

15. The sealing valve according to claim 13 or 14, wherein said fluid medium charging and discharging device increases the amount of charged fluid medium after the sealing assembly has moved to the position of engagement with the valve seat until the expansion bladder expands in a direction normal to the circumferential direction against the valve seat to effect the seal, and wherein said fluid medium charging and discharging device discharges or withdraws fluid medium immediately before the sealing assembly is moved out of the position of engagement with the valve seat.