CN216200682U - Seal, seal assembly and sealing valve - Google Patents

Seal, seal assembly and sealing valve Download PDF

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Publication number
CN216200682U
CN216200682U CN202122407111.2U CN202122407111U CN216200682U CN 216200682 U CN216200682 U CN 216200682U CN 202122407111 U CN202122407111 U CN 202122407111U CN 216200682 U CN216200682 U CN 216200682U
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China
Prior art keywords
valve plate
valve
seal
sealing
pin
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CN202122407111.2U
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Chinese (zh)
Inventor
程高锋
王伟
杨耀辉
张宏伟
王瑞星
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Luoyang Mingyuan Petrochemical Industry Technology Co ltd
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Luoyang Mingyuan Petrochemical Industry Technology Co ltd
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Abstract

The utility model provides a seal, a seal assembly and a sealing valve. The sealing element comprises a first valve plate, a second valve plate and an elastic wall, wherein the first valve plate and the second valve plate are respectively fixed to two ends of the elastic wall and form a sealed cavity with the elastic wall, the elastic wall is telescopic in the normal direction of the sealing element, the sealed cavity expands when a fluid medium is filled, the first valve plate and the second valve plate move towards the direction away from each other, the sealed cavity contracts when the fluid medium flows out, and the elastic force of the elastic wall enables the first valve plate and the second valve plate to move towards the direction close to each other. According to the sealing member, the sealing assembly and the sealing valve, the sealed cavity is expanded or contracted by filling and discharging the fluid medium, and the sealing surface of the sealing member is pressed against or separated from the sealing surface matched with the sealing member to realize sealing or unsealing. This provides a sufficiently uniform pressing force during sealing and avoids sliding friction between the two sealing surfaces after the seal is released, reducing wear and preventing the seal from seizing.

Description

Seal, seal assembly and sealing valve
Technical Field
The utility model relates to the field of petrochemistry, in particular to a sealing element used in the field of petrochemistry. The utility model also relates to a seal assembly and a seal valve.
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. The pipelines are used for inputting or discharging high-temperature smoke, air and other low-pressure media so as to match the production process.
In order to open and close these ducts, metal seals adapted to high temperatures are usually provided in the ducts. Many sealing devices extrude a valve seat sealing ring through a sealing surface of a valve plate to enable a valve seat to generate elastic force, and a certain sealing specific pressure is achieved to ensure the sealing of the valve. The rigid gate valve is hard seal between the metal valve plate and the metal sealing surface, and the inherent pressing force is insufficient, so that the rigid gate valve is poor in sealing performance and is not suitable for occasions requiring tight sealing. The sealing ring on the valve plate of the elastic gate valve is tightly attached to the valve seat all the time, so that the elastic gate valve is always subjected to sliding friction of the valve seat, the abrasion consumption of the sealing ring is serious, and the valve seat is also seriously worn. Meanwhile, the existing sealing device for the large-caliber gas pipeline generally has the faults of easy blocking and the like. Because the elastic sealing ring is mostly made of rubber or plastic materials, the application temperature range of the elastic sealing ring is low, such as within 250 ℃. Therefore, the existing sealing device for the large-caliber gas pipeline has the defects of poor sealing performance, serious abrasion, small temperature resistance range, easy blocking and the like.
There is therefore a need for an improved sealing device to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to at least partially overcome the deficiencies in the prior art by providing a seal, a seal assembly and a sealing valve.
According to one aspect of the utility model, there is provided a seal comprising a first valve plate, a second valve plate and one or more resilient walls disposed between the first valve plate and the second valve plate, the first valve plate being secured to a first end of the resilient walls, and the second valve plate is fixed to a second end of the elastic wall opposite to the first end, the first valve plate, the second valve plate and each elastic wall forming a closed cavity, the closed cavity can be filled with or flow out of fluid medium, the elastic wall is telescopic in the normal direction of the first valve plate or the second valve plate, the closed cavity expands when the fluid medium is filled, and the first valve plate and the second valve plate move in a direction away from each other, and the hermetic chamber contracts when the fluid medium flows out, and the elastic force of the elastic wall moves the first valve plate and the second valve plate toward a direction in which they approach each other.
In an exemplary embodiment, the seal includes two or more resilient walls evenly arranged along the periphery of the first valve plate and the second valve plate, the first valve plate, the second valve plate and the resilient walls form two or more enclosed cavities, and the two or more enclosed cavities are in fluid communication with each other to allow fluid medium to circulate.
In an exemplary embodiment, the elastic wall is a telescopic joint having a corrugated cross section and a wave number of not less than 1, and is composed of a non-metallic superelastic material or a metallic material.
In an exemplary embodiment, the seal further comprises two or more elastic members disposed between the first valve plate and the second valve plate, a first end of each elastic member is connected to the first valve plate, a second end of each elastic member is connected to the second valve plate, and each elastic member is configured to move the first valve plate and the second valve plate toward a direction in which they approach each other when the hermetic chamber is contracted.
In an exemplary embodiment, the sealing member further includes two or more guide sleeves and a guide shaft arranged in one-to-one correspondence with the elastic member, the guide sleeves are arranged around the elastic member, and a first end of the guide sleeve is fixed to the first valve plate, a first end of the guide shaft is arranged in the guide sleeve, a second end of the guide shaft is fixed to the second valve plate, and the guide shaft and the guide sleeves are clearance-fitted, and a second end of the elastic member is fixed to the first end of the guide shaft.
In an exemplary embodiment, the elastic member, the guide sleeve and the guide shaft are disposed within the closed cavity.
In an exemplary embodiment, the number of elastic members is equal to the number of elastic walls, and each elastic member is disposed within a closed cavity formed by the corresponding elastic wall.
In an exemplary embodiment, the two or more elastic members are uniformly arranged along the circumference of the first valve plate and the second valve plate.
In an exemplary embodiment, the first valve plate and the second valve plate are rigid valve plates, the first valve plate and the second valve plate are arranged in parallel with each other, and the first valve plate and the second valve plate are composed of a heat-resistant metal material or a heat-resistant non-metal material.
In an exemplary embodiment, the seal further comprises a valve plate connecting plate fixedly connected to the first valve plate and the second valve plate, respectively, and a valve plate connecting pin movably connected to the first valve plate and the second valve plate, respectively.
In an exemplary embodiment, the valve plate connecting plate includes first and second valve plate connecting plates fixed to outer edges of the first and second valve plates, respectively, the first and second valve plate connecting plates include first and second pin holes penetrating a plate body and aligned with each other, respectively, and the valve plate connecting pin is movably connected to the first and second valve plate connecting plates through the first and second pin holes.
In an exemplary embodiment, the valve plate connecting pin includes a first pin section, a second pin section, and a connecting section connecting the first pin section and the second pin section, and the first pin section and the second pin section are parallel to a normal direction of the first valve plate or the second valve plate and have a straight shape, and the connecting section has a semicircular shape.
In an exemplary embodiment, the first pin segment extends through the first pin hole, a first end of the first pin segment remote from the connecting segment is exposed from the first pin hole, the second pin segment extends through the second pin hole, and a second end of the second pin segment remote from the connecting segment is exposed from the second pin hole, and the valve plate connecting pin further includes a first stopper portion and a second stopper portion, the first stopper portion being disposed at the first end of the first pin segment for preventing the first valve plate connecting plate from being detached from the first pin segment, and the second stopper portion being disposed at the second end of the second pin segment for preventing the second valve plate connecting plate from being detached from the second pin segment.
According to another aspect of the present invention there is provided a seal assembly comprising a valve plate drive connector, a fluid medium hose and a seal as described above, wherein the seal is driven in translation by the valve plate drive connector and the fluid medium hose communicates with the enclosed cavity for delivery of fluid medium to or from the enclosed cavity.
According to a further aspect of the present invention there is provided a sealing valve comprising a valve body, an actuating actuator and a seal assembly as described above, wherein the actuating actuator is configured to actuate the valve plate actuating connector to translate the seal to or from a position in which it engages a valve seat of the valve body.
In an exemplary embodiment, the sealing valve further includes a fluid medium charging and discharging device, the fluid medium charging and discharging device is communicated with the fluid medium hose, the fluid medium is conveyed to the sealed cavity or separated from the sealed cavity through the fluid medium hose, after the sealing member is translated to a position matched with the valve seat, the fluid medium charging and discharging device increases the amount of the fluid medium charged into the sealed cavity, the sealed cavity is expanded, the first valve plate and the second valve plate abut against a sealing surface of the valve seat to achieve sealing, and before the sealing member is separated from the position matched with the valve seat, the fluid medium charging and discharging device discharges or extracts the fluid medium, the sealed cavity is contracted, and the first valve plate and the second valve plate are separated from the sealing surface of the valve seat to release sealing.
In an exemplary embodiment, the valve body includes a seal passage opened at a middle position in a direction perpendicular to a normal direction of the first valve plate or the second valve plate, and a first valve seat and a second valve seat respectively disposed at both sides of the seal passage.
In an exemplary embodiment, the valve body further includes a valve seat packing disposed on a surface of at least one of the first valve seat and the second valve seat, the valve seat packing being composed of a heat-resistant metal material or a heat-resistant non-metal material.
In an exemplary embodiment, valve seat gaskets are disposed on surfaces of the first and second valve seats, and the valve seat gasket of the first valve seat is composed of a different material from the valve seat gasket of the second valve seat.
In an exemplary embodiment, the sealing valve further comprises a valve plate drive mechanism cavity in communication with the seal channel for housing the valve plate drive connector and the fluid medium hose and housing the seal when the seal is out of engagement with the valve seat, and the valve plate drive connector is a lead screw, a rack, or a rigid shaft.
According to the sealing member, the sealing assembly and the sealing valve, the sealing cavity is expanded or contracted by filling and discharging fluid media, and the sealing surface of the sealing member is pressed against the sealing surface matched with the sealing member to realize sealing or is separated from contact with the sealing member to release sealing. This provides a sufficiently uniform pressing force during sealing and, after the seal is released, avoids sliding friction between the two sealing surfaces, reduces wear and prevents the seal from jamming in the pipe.
Drawings
Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a front view of a first embodiment of a seal according to the present invention;
FIG. 2 is a side cross-sectional view of a first embodiment of a seal according to the present invention;
FIG. 3 is a front view of a second embodiment of a seal according to the present invention;
FIG. 4 is a side cross-sectional view of a second embodiment of a seal according to the present invention;
FIG. 5 is a front elevational view of a third embodiment of a seal in accordance with the present invention;
FIG. 6 is an enlarged partial view of a first embodiment of a seal according to the present invention;
FIG. 7 is an enlarged partial view of a first embodiment of a seal according to the present invention;
FIG. 8 is a front view of an embodiment of a seal assembly according to the present invention;
FIG. 9 is a side cross-sectional view of an embodiment of a seal assembly according to the present invention;
fig. 10 is a front view of a first embodiment of a sealing valve according to the present invention;
figure 11 is a side cross-sectional view of a first embodiment of a sealing valve according to the present invention;
fig. 12 is a front view of a second embodiment of a sealing valve according to the present invention;
figure 13 is a side cross-sectional view of a second embodiment of a sealing valve according to the present invention;
fig. 14 is a front view of a third embodiment of a sealing valve according to the present invention; and is
Fig. 15 is a side sectional view of a third 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 not restrictive of the utility model. 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 "upper", "lower", "inner", "outer", "center", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the utility model 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.
Fig. 1 is a front view and fig. 2 is a side sectional view of a first embodiment of a seal according to the present invention. Referring to fig. 1 and 2 together, in a first embodiment of the seal of the present invention, the seal 100 includes a first valve plate 112, a second valve plate 114, and a resilient wall 120, and the resilient wall 120 is disposed between the first valve plate 112 and the second valve plate 114.
In this embodiment, the seal 100 includes a resilient wall 120. The first valve plate 112, the second valve plate 114, and the elastic wall 120 are arranged in order in the axial direction of the seal 100 (i.e., the y direction in fig. 1 and 2). The elastic wall 120 has a first end and a second end that are axially opposite to each other. The first valve plate 112 is fixed to a first end of the elastic wall 120, and the second valve plate 114 is fixed to a second end of the elastic wall 120. First valve plate 112, second valve plate 114, and resilient wall 120 may form a sealed cavity 130, and sealed cavity 130 may be filled with or drained of a fluid medium.
In the present embodiment, the elastic wall 120 is stretchable in the axial direction of the seal 100. The hermetic chamber 130 expands when the fluid medium is charged, and the first valve plate 112 and the second valve plate 114 move in directions away from each other. Closed chamber 130 contracts when the fluid medium flows out, and the elastic force of elastic wall 120 moves first valve plate 112 and second valve plate 114 toward the direction in which they approach each other.
In the present embodiment, the sealing surfaces of the seal 100 include the sealing surface of the first valve plate 112 and the sealing surface of the second valve plate 114. The sealing surface of the first valve plate 112 is a portion of the outer surface of the first valve plate 112 near the edge, and the sealing surface of the second valve plate 114 is a portion of the outer surface of the second valve plate 114 near the edge. The outer surfaces of the first valve plate 112 and the second valve plate 114 refer to surfaces of the first valve plate 112 and the second valve plate 114 that are away from the hermetic chamber 130. The sealing surface that mates with the sealing surface of the seal 100 may be disposed to correspond to the sealing surface of the seal 100.
In the present embodiment, when the fluid medium is filled into the closed chamber 130, since the elastic wall 120 is stretchable in the axial direction of the seal 100, the elastic wall 120 is stretched in the axial direction, the closed chamber 130 is expanded, and the distance between the first valve plate 112 and the second valve plate 114 is increased.
As the fluid medium charge is gradually increased, the spacing between the first valve plate 112 and the second valve plate 114 reaches a predetermined spacing and the sealing surface of the seal 100 begins to contact the mating sealing surface.
With the further gradual increase of the filling amount of the fluid medium, the pressure of the sealing surface of the sealing element 100 pressing against the sealing surface matched with the sealing element gradually increases, and the sealing is realized after the sufficient specific sealing pressure is reached. It can be seen that the use of the pressure-driven principle can provide sufficient and uniform pressing force between the sealing surface of the seal 100 and the sealing surface that mates therewith to achieve a stable and reliable seal. The first and second valve plates 112 and 114 may be rigid valve plates, and the first and second valve plates 112 and 114 are composed of a heat-resistant metal material or a heat-resistant nonmetal material. Even in the case of a rigid valve plate, the seal 100 can provide sufficient and uniform compressive force between the rigid valve plate (e.g., a metal valve plate) and the metal sealing face with which it mates, thereby achieving a reliable hard seal.
In the present embodiment, when the fluid medium is discharged from the sealing chamber 130, since the elastic wall 120 is stretchable in the axial direction of the seal 100, the elastic wall 120 is contracted in the axial direction and the sealing chamber 130 is contracted. The distance between the first valve plate 112 and the second valve plate 114 is reduced by the contraction of the hermetic chamber 130 and the elastic restoring force of the elastic wall 120. As the spacing between the first valve plate 112 and the second valve plate 114 decreases to less than the preset spacing, the sealing surface of the seal 100 comes out of contact with the mating sealing surface to unseal. It can be seen that after the seal is released, the sealed chamber 130 is in a pressure relief state, and the sealing surface of the sealing member 100 and the sealing surface matched with the sealing member are separated from contact, even a large distance is kept. This may avoid sliding friction between the sealing surface of the seal 100 and the sealing surface with which it is mated, may reduce wear caused by sliding friction, and may extend the useful life of the seal 100 and the device (e.g., valve seat) with which it is used. Further, after the seal is released, a small space is maintained between the first valve plate 112 and the second valve plate 114 of the seal 100, and thus the failure that the seal 100 is stuck in the pipe can be prevented.
In the present embodiment, the first valve plate 112 and the second valve plate 114 are arranged in parallel with each other. However, embodiments of the present invention are not limited thereto, and the first valve plate 112 and the second valve plate 114 may not be parallel to each other, for example, the first valve plate 112 and the second valve plate 114 may form a wedge structure.
In the embodiment of the present invention, the fluid medium filled or discharged in the sealed cavity 130 may be a gas such as air, or may be a liquid.
Fig. 3 is a front view and fig. 4 is a side sectional view of a second embodiment of a seal according to the present invention. The second embodiment of the seal 100 shown in fig. 3 and 4 is similar to the first embodiment of the seal 100 shown in fig. 1 and 2, except that the seal 100 includes two or more resilient walls 120. Referring to fig. 3 and 4 together, in the second embodiment of the seal of the present invention, for example, two or more elastic walls 120 are uniformly arranged along the peripheries of the first valve plate 112 and the second valve plate 114, the first valve plate 112, the second valve plate 114, and the elastic walls 120 form two or more closed cavities 130, and the two or more closed cavities 130 are in fluid communication with each other to allow the fluid medium to circulate. By providing two or more resilient walls 120 to form two or more enclosed cavities 130, the spacing between first valve plate 112 and second valve plate 114 may be more uniformly and consistently adjusted, thereby facilitating improved sealing effectiveness and disengagement of the sealing surface of the seal from its mating sealing surface, as compared to the case where seal 100 includes a single resilient wall 120.
In this embodiment, the seal 100 includes six resilient walls 120. Six elastic walls 120 are uniformly arranged along the periphery of the first valve plate 112 and the second valve plate 114. For example, the elastic walls 120 may be divided into two groups, each group including three elastic walls 120, and the three elastic walls 120 of each group are arranged at equal intervals in the z direction along the peripheral edges of the first valve plate 112 and the second valve plate 114. Each of the elastic walls 120 forms a sealed chamber 130 with the first shutter 112 and the second shutter 114. Two adjacent closed cells 130 are in fluid communication with each other, for example, via a fluid medium conduit 132, thereby allowing fluid medium to circulate between the plurality of closed cells 130. The fluid medium line 132 may be a rigid line or a flexible line. In an exemplary embodiment, the plurality of elastic walls 120 may be arranged at equal intervals on a virtual circle centered on the center of the sealing member 100.
In the present embodiment, the number of the elastic members 140 is equal to the number of the elastic walls 120, and each elastic member 140 is disposed within the hermetic cavity 130 formed by the corresponding elastic wall 120 to avoid the exposure of the elastic member 140 to low-pressure media such as smoke, air, etc. in the duct. It should be noted that the elastic member 140 may be disposed outside the hermetic chamber 130.
Fig. 5 is a front view of a third embodiment of a seal according to the present invention. The third embodiment of the seal 100 shown in fig. 5 is similar to the first embodiment of the seal 100 shown in fig. 1 and the second embodiment of the seal 100 shown in fig. 3, except that the overall planar shape of the seal 100 is circular. In the third embodiment of the seal member of the present invention, the overall planar shape of the seal member 100 is circular. The overall planar shape of the seal 100 is determined by the overall planar shape of the first valve plate 112 or the second valve plate 114. The overall planar shape refers to a shape in a front view, i.e., a shape in a plane (i.e., an xz plane in fig. 5) perpendicular to the axial direction (i.e., the y direction in fig. 5) of the seal member 100. For example, in the first embodiment of the seal 100 shown in fig. 1 and the second embodiment of the seal 100 shown in fig. 3, the first valve plate 112 and the second valve plate 114 have a rectangular overall planar shape, and therefore the seal 100 has a rectangular overall planar shape. In contrast, in the present embodiment, the first valve plate 112 and the second valve plate 114 have a circular overall planar shape, and thus the seal 100 has a circular overall planar shape.
In the embodiment of the present invention, the overall planar shape of the seal member 100 is not limited to the shape shown in fig. 1, 3, and 5, and may be, for example, a square, an oval, or the like, or other shapes provided as needed.
In an embodiment of the present invention, the elastic wall 120 may be a telescopic joint. A telescopic joint is also commonly referred to as a telescopic, compensator or expansion joint. As an elastic compensation element capable of freely extending and contracting, an expansion joint is generally used for compensating expansion and contraction caused by temperature change of a pipeline or a container in the petrochemical field due to the advantages of good performance, high stability, compact structure, low price and the like. In the utility model, the expansion joint is connected with the two valve plates in a sealing manner to form a sealing element with a sealed cavity, and the expansion joint is expanded or shortened along the axial direction and the sealed cavity is expanded or contracted through the pressurization or pressure relief operation on the sealed cavity, so that the two valve plates are driven to be far away from or close to each other along the axial direction, and the sealing removal are realized.
In an embodiment of the present invention, the elastic wall 120 may be a telescopic joint or a bellows (corrugated) joint. When the elastic wall 120 is a bellows-type telescopic segment, the elastic wall 120 has a bellows shape in an axial section of the seal 100, i.e., a section perpendicular to the radial direction (for example, yz plane in fig. 2). For example, the wave number of the elastic wall 120 is not less than 1. In the first embodiment of seal 100 shown in fig. 2, the wave number of resilient wall 120 is 2. In the second embodiment of seal 100 shown in fig. 4, the wave number of elastic wall 120 is 4. The wave number of the elastic wall 120 of the seal 100 according to the present invention is not limited to the configuration shown in fig. 2 and 4, but may be set as needed, for example, according to the magnitude of the elastic restoring force and the expansion joint sectional area that are needed.
In an embodiment of the present invention, the elastic wall 120 is composed of a non-metallic superelastic material or a metallic material. Non-limiting examples of non-metallic superelastic materials include, for example, rubber, organic polymer materials, and the like. Non-limiting examples of the metal material include a heat and corrosion resistant alloy material, such as a nickel-based alloy, or a stainless steel material such as S30408, S31008.
In an embodiment of the present invention, both ends of the elastic wall 120 may be directly fixedly connected to the first valve plate 112 and the second valve plate 114, thereby forming the hermetic chamber 130 with the first valve plate 112 and the second valve plate 114. For example, both ends of the elastic wall 120 may be fixed to the first valve plate 112 and the second valve plate 114 by welding.
In an embodiment of the present invention, the elastic wall 120 may include flanges disposed at both ends, and may be detachably coupled to the first and second valve plates 112 and 114 by the flanges using bolts and nuts. At the connecting position of the elastic wall 120 with the first valve plate 112 and the second valve plate 114, packing, a packing ring, or the like may be employed to improve sealability.
With continued reference to fig. 1 and 5, when seal 100 includes one resilient wall 120, resilient wall 120 may extend along the edges of first valve plate 112 and second valve plate 114, and resilient wall 120 has an overall planar shape that matches or is similar to first valve plate 112 and second valve plate 114. This effectively utilizes the surface area of first valve plate 112 and second valve plate 114 and facilitates increasing the volume of enclosed cavity 130 enclosed by resilient wall 120 and first valve plate 112 and second valve plate 114. For example, in the first embodiment of the seal 100 shown in fig. 1, the first valve plate 112 and the second valve plate 114 have a rectangular overall planar shape, and the elastic wall 120 has a rectangular overall planar shape matching or similar thereto. In the third embodiment of the seal 100 shown in fig. 5, the first valve plate 112 and the second valve plate 114 have a circular overall planar shape, and the elastic wall 120 also has a circular overall planar shape matching or similar thereto. However, the overall planar shape of the elastic wall 120 is not limited thereto. For example, in the first embodiment of the seal 100 shown in fig. 1, the resilient wall 120 may have an overall planar shape of a rounded rectangle, square, rounded square, circle, or oval. In a third embodiment of the seal 100 shown in fig. 5, the resilient wall 120 may have an overall planar shape that is rectangular, rounded rectangular, square, rounded square, or elliptical. The overall planar shape of the elastic wall 120 may also be other shapes provided as desired.
With continued reference to fig. 3, in a second embodiment of the seal 100, the seal 100 includes two or more resilient walls 120, and each resilient wall 120 has, for example, a circular overall planar shape. However, the overall planar shape of each elastic wall 120 may be a rectangle, a rounded rectangle, a square, a rounded square, an ellipse, or the like, or other shapes provided as needed.
With continued reference to fig. 1 and 2, in the first embodiment of the seal 100, the seal 100 may further include two resilient members 140 disposed between the first valve plate 112 and the second valve plate 114. A first end of each elastic member 140 is connected to the first valve plate 112, and a second end opposite to the first end is connected to the second valve plate 114. Each elastic member 140 is configured to move the first and second valve plates 112 and 114 toward each other when the hermetic chamber 130 is contracted.
In the embodiment of the present invention, the elastic member 140 is disposed between the first valve plate 112 and the second valve plate 114. When the sealed chamber 130 is filled with the fluid medium, both the elastic wall 120 and the elastic member 140 are elongated in the y direction, the sealed chamber 130 expands, and the distance between the first valve plate 112 and the second valve plate 114 increases. When the fluid medium is discharged from the closed chamber 130, both the elastic wall 120 and the elastic member 140 contract in the y direction, and the closed chamber 130 contracts. Under the contraction of the hermetic chamber 130, the elastic restoring force of the elastic wall 120, and the elastic restoring force of the elastic member 140, and the distance between the first valve plate 112 and the second valve plate 114 is decreased, so that the sealing surface of the sealing member 100 and the sealing surface fitted thereto are out of contact to release the sealing. It can be seen that due to the presence of the resilient member 140, the resilient member 140 provides additional resilient restoring force to the first and second valve plates 112, 114 during the unsealing process, ensuring that the sealing surface of the seal 100 is out of contact with the mating sealing surface, or even maintains a large gap. This may further avoid sliding friction between the sealing surface of the seal 100 and the mating sealing surface. Further, after releasing the seal, the elastic restoring force provided by the elastic member 140 in the contracted state can further reduce the interval between the first valve plate 112 and the second valve plate 114, and thus the failure in which the seal member 100 is stuck in the pipe can be further prevented. In an embodiment of the present invention, the elastic member 140 may be a tension spring.
In a first embodiment of the seal 100 shown in fig. 1 and 2, the seal 100 includes two resilient members 140. However, in embodiments of the present invention, the sealing member 100 may include more elastic members 140. The two or more elastic members 140 are uniformly arranged along the circumference of the first and second valve plates 112 and 114, thereby providing elastic restoring force between the first and second valve plates 112 and 114 that is uniformly distributed in space during and after the unsealing process. In the second embodiment of the seal 100 shown in fig. 3 and 4, the seal 100 includes, for example, two sets of elastic members 140, and each set of elastic members 140 includes three elastic members 140 arranged at equal intervals in the z direction along the peripheral edges of the first valve plate 112 and the second valve plate 114. In the third embodiment of the sealing member 100 shown in fig. 5, the sealing member 100 includes, for example, four elastic members 140, and the four elastic members 140 may be arranged at equal intervals on a virtual circle centered on the center of the sealing member 100. It should be noted that fig. 2 is a side sectional view through a central axis (shown by a dotted line in the drawing) of the seal 100, but fig. 4 is a side sectional view through a line connecting the three elastic members 140 on the right side to show the three elastic members 140.
Fig. 6 is an enlarged partial view of a first embodiment of a seal according to the present invention, and in particular a first region a1 of the seal 100 of fig. 2. Referring to fig. 6, in the present embodiment, the sealing member 100 may further include a guide sleeve 150 and a guide shaft 160. The guide sleeve 150 is disposed around the elastic member 140, and a first end of the guide sleeve 150 is fixed to the first valve plate 112. A first end of the guide shaft 160 is disposed within the guide sleeve 150, and a second end of the guide shaft 160 is fixed to the second valve plate 114. The guide shaft 160 and the guide sleeve 150 are a clearance fit. The second end of the elastic member 140 is fixed to the first end of the guide shaft 160.
In the present embodiment, several (two or more) guide sleeves 150, a guide shaft 160, and an elastic member 140 such as a tension spring are disposed between the first valve plate 112 and the second valve plate 114. Opposite ends of the guide sleeve 150 and the guide shaft 160 are fixed to the first valve plate 112 and the second valve plate 114, respectively, the other end of the guide shaft 160 is disposed within the other end of the guide sleeve 150 with a fitting tolerance of a clearance fit, and one end of an elastic member 140 such as a tension spring is coupled to the guide shaft 160 and the other end is coupled to the first valve plate 112 where the guide sleeve 150 is located.
In the present embodiment, the guide sleeve 150 and the guide shaft 160 ensure that the first valve plate 112 and the second valve plate 114 perform relative movement only in the axial direction (e.g., y direction shown in fig. 6) of the seal 100 when the hermetic chamber 130 expands or contracts, but have no relative displacement in a plane perpendicular to the axial direction (e.g., xz plane shown in fig. 6). For example, when the first valve plate 112 and the second valve plate 114 are arranged parallel to each other, the guide sleeve 150 and the guide shaft 160 can ensure that the two are always in a parallel positional relationship with each other, which is advantageous for providing a good sealing effect when sealing is achieved, and for completely releasing the contact between the sealing surface of the sealing member and the sealing surface mating therewith when the sealing is released.
In an embodiment of the present invention, referring to fig. 2 and 4, two or more guide sleeves 150 and guide shafts 160 are arranged in one-to-one correspondence with two or more elastic members 140. The elastic member 140, the guide sleeve 150, and the guide shaft 160 may all be disposed within the sealed cavity 130 to prevent the elastic member 140, the guide sleeve 150, and the guide shaft 160 from being exposed to low pressure media such as smoke, air, etc. in the pipe.
Fig. 7 is an enlarged partial view of a first embodiment of a seal according to the present invention, and in particular of the second region a2 of the seal 100 in fig. 2. Referring to fig. 7, in the present embodiment, seal 100 may further include a valve plate connecting plate 170 and a valve plate connecting pin 180.
In the present embodiment, the valve plate connecting plate 170 may be fixedly connected to the first and second valve plates 112 and 114, and the valve plate connecting pin 180 is movably connected to the first and second valve plates 112 and 114, respectively. Valve plate coupling plate 170 may include first and second valve plate coupling plates 172 and 174 secured to outer edges of first and second valve plates 112 and 114, respectively. The first and second valve plate connecting plates 172 and 174 may include first and second pin holes 173 and 175, respectively, extending through the respective plate bodies and aligned with each other. The valve plate connecting pin 180 may be movably connected to the first and second valve plate connecting plates 172 and 174 through the first and second pin holes 173 and 175. The valve plate connecting pin 180 may include a first pin segment 181, a second pin segment 182, and a connecting segment 183 connecting the first pin segment 181 and the second pin segment 182. The first and second pin sections 181 and 182 are parallel to the normal direction of the first or second valve plate 112 or 114 and have a straight shape, and the connection section 183 has a semicircular shape. The connection section 183 of the valve plate connection pin 180 may be connected to a valve plate driving connector discussed below to transmit a driving force to the sealing member 100 (or the first and second valve plates 112 and 114).
In the present embodiment, the sealed chamber 130 brings the first valve plate 112 and the second valve plate 114 close to each other in the axial direction (y direction in fig. 7) to release the seal when contracted. In this process, the first valve plate connecting plate 172 fixed to the first valve plate 112 is fitted over the first pin section 181 through the first pin hole 173, and moves in the y direction along the first pin section 181 toward the second valve plate connecting plate 174 as a whole. Similarly, the second valve plate connecting plate 174 fixed to the second valve plate 114 is fitted over the second pin section 182 through the second pin hole 175, and moves in the y direction along the second pin section 182 toward the first valve plate connecting plate 172 as a whole. Accordingly, the movable connection between the valve plate connecting pin 180 and the first and second valve plate connecting plates 172 and 174 is achieved by the pin hole and pin shaft connection, and thus the movable connection between the valve plate connecting pin 180 and the first and second valve plates 112 and 114 is achieved, and thus the sealing is released by the axial approach between the first and second valve plates 112 and 114 when the hermetic chamber 130 is contracted. In this embodiment, the dimension of the connecting section 183 in the y-direction may define the minimum spacing between the first valve plate 112 and the second valve plate 114.
In this embodiment, the sealed chamber 130, when expanded, draws the first valve plate 112 and the second valve plate 114 away from each other in the axial direction to achieve sealing. In this process, the first valve plate connecting plate 172 fixed to the first valve plate 112 is fitted over the first pin section 181 through the first pin hole 173, and is away from the second valve plate connecting plate 174 as a whole in the y direction along the first pin section 181. Similarly, the second valve plate connecting plate 174 fixed to the second valve plate 114 is fitted over the second pin section 182 through the second pin hole 175, and is away from the first valve plate connecting plate 172 as a whole in the y direction along the second pin section 182. Accordingly, the movable connection between the valve plate connecting pin 180 and the first and second valve plate connecting plates 172 and 174 is achieved by the pin hole and pin shaft connection, and thus the movable connection between the valve plate connecting pin 180 and the first and second valve plates 112 and 114 is achieved, and sealing is achieved by the axial distance between the first and second valve plates 112 and 114 when the hermetic chamber 130 is expanded.
In this embodiment, the first pin segment 181 may extend through the first pin hole 173 and a first end of the first pin segment 181 distal from the connecting segment 183 emerges from the first pin hole 173, and the second pin segment 182 extends through the second pin hole 175 and a second end of the second pin segment 182 distal from the connecting segment 183 emerges from the second pin hole 175. For example, valve plate connecting pin 180 may further include a first stopper 184 and a second stopper 185. The first stopper 184 may be disposed at a first end of the first pin section 181 and serves to prevent the first valve plate connecting plate 172 from being detached from the first pin section 181. The second stopper portion 185 may be disposed at a second end of the second pin section 182 and serves to prevent the second valve plate connecting plate 174 from being detached from the second pin section 182. In the present embodiment, the first stopper portion 184 and the second stopper portion 185 define the maximum distance between the first valve plate 112 and the second valve plate 114.
The present invention also provides a seal assembly comprising the seal described in the above embodiments. The seal assembly of the present invention will be described hereinafter with reference to fig. 8 and 9.
Fig. 8 is a front view and fig. 9 is a side cross-sectional view of an embodiment of a seal assembly according to the present invention. Referring to fig. 8 and 9 concurrently, in an embodiment of the seal assembly of the present invention, seal assembly 200 comprises seal 100, valve plate drive connector 210 and fluid media hose 220. Seal 100 is driven in translation by valve plate drive connector 210. The fluid medium hose 220 communicates with the enclosed cavity 130 and is used to convey fluid medium to the enclosed cavity 130 or away from the enclosed cavity 130. The seal 100 included in the seal assembly 200 of the present embodiment may be the seal 100 of the first, second and third embodiments of seals described in connection with fig. 1-5.
Valve plate drive connector 210 functions to transmit the motion of the drive means to seal 100 of seal assembly 200 such that seal 100 translates to or from a position of engagement with a valve seat. When the direction of translation of seal 100 of seal assembly 200 is up and down (e.g., z-direction in fig. 8 and 9), valve plate drive connector 210 can be a flexible connection such as a wire rope, chain, or hinge, or a rigid connection such as a lead screw, rack, rigid shaft, or the like. When the direction of translation of seal 100 of seal assembly 200 is horizontal, valve plate drive connector 210 is preferably a rigid connection, such as a lead screw, rack, rigid shaft, or the like.
In the present embodiment, valve plate drive connector 210 is connected to valve plate connecting pin 180 of seal 100, which in turn is connected to first valve plate 112 and second valve plate 114 by valve plate connecting plate 170. Valve plate drive connector 210 is actuated such that seal 100 translates to or from a position of engagement with a valve seat. After the seal member 100 is translated to the position of engagement with the valve seat, the amount of fluid medium charged into the sealed chamber 130 is increased by the fluid medium hose 220, and the sealed chamber 130 is expanded, and the sealing surface of the seal member 100 abuts against the sealing surface of the valve seat with which it is engaged, for example, the axially outer surfaces of the first valve plate 112 and the second valve plate 114 abut to effect a seal. Immediately before the seal 100 is moved out of engagement with the valve seat, the fluid medium is discharged or drawn through the fluid medium hose 220, the hermetic chamber 130 contracts, and the sealing surface of the seal 100 and the sealing surface engaged therewith are out of contact, for example, the axially outer surfaces of the first valve plate 112 and the second valve plate 114 are out of contact with the sealing surface of the valve seat to release the seal.
As can be seen from the above description, when the seal assembly 200 achieves a seal, the pressure driving principle can be used to provide a sufficient and uniform pressing force between the sealing surface of the seal 100 and the sealing surface cooperating therewith to achieve a stable and reliable seal. After the seal is released, the sealing surface of the seal 100 and the mating sealing surface are out of contact, even maintaining a large separation. This may avoid sliding friction between the sealing surface of the seal 100 and the sealing surface with which it is mated, may reduce wear caused by sliding friction, and may extend the useful life of the seal 100 and the device (e.g., valve seat) with which it is used. Further, after the seal assembly 200 is unsealed, a small space is maintained between the first valve plate 112 and the second valve plate 114 of the seal 100, and thus it is possible to prevent a malfunction in which the seal assembly 200 or the seal 100 is stuck in a pipe. For example, seal assembly 200 or seal 100 may be prevented from seizing in the conduit during the time that valve plate drive connector 210 is actuated such that seal 100 translates to or from a position of mating with a valve seat.
The present invention also provides a sealing valve comprising the seal assembly described in the above embodiments. The seal assembly of the present invention will be described hereinafter with reference to fig. 10 to 15.
Fig. 10 is a front view and fig. 11 is a side sectional view of a first embodiment of a sealing valve according to the present invention. Referring to fig. 10 and 11 together, in a first embodiment of a sealing valve of the present invention, a sealing valve 300 comprises a seal assembly 200, a valve body 310, a drive actuator 320, a fluid medium charging and discharging device 330 and a valve plate drive mechanism chamber 340. The seal assembly 200 comprised in the sealing valve 300 of the present embodiment may be the seal assembly 200 described in connection with fig. 8 and 9, and the seal 100 comprised in the seal assembly 200 may be the seal 100 described in connection with fig. 1 and 2.
In this embodiment, drive actuator 320 is configured to drive valve plate drive connector 210 to translate seal 100 to and from a position of engagement with a valve seat of valve body 310. In this case, the actuator 320 is actuated to effect opening and closing of the sealing valve 300 by actuating the seal 100 in translation, and the sealing valve 300 thus achieved may be a gate valve or a plate valve.
In the present embodiment, the fluid medium charging and discharging device 330 communicates with the fluid medium hose 220, and the fluid medium is supplied to the sealed cavity 130 of the sealing member 100 or is separated from the sealed cavity 130 of the sealing member 100 through the fluid medium hose 220. After the sealing member 100 is translated to the position of fitting with the valve seat, the fluid medium charging and discharging device 330 increases the amount of the fluid medium charged into the sealed cavity 130, the sealed cavity 130 is expanded, and the first valve plate 112 and the second valve plate 114 abut against the sealing surface of the valve seat to realize sealing. Immediately before the sealing member 100 is separated from the position of engagement with the valve seat, the fluid medium charging and discharging device 330 discharges or draws out the fluid medium, the sealed chamber 130 contracts, and the first valve plate 112 and the second valve plate 114 are separated from contact with the sealing surface of the valve seat to release the sealing.
In the present embodiment, the valve body 310 includes a seal passage 316 opened in a direction perpendicular to a normal direction of the first valve plate 112 or the second valve plate 114 at a middle position, and a first valve seat 312 and a second valve seat 314 respectively disposed at both sides of the seal passage 316. The seal passage 316 forms a recess in the bottom of the valve body 310 and an opening in the top of the valve body 310 to communicate with the disc drive mechanism cavity 340.
In this embodiment, the valve body 310 may further include a seat seal 318 disposed on a surface of at least one of the first and second valve seats 312 and 314. According to the present invention, neither the first valve seat 312 nor the second valve seat 314 may be provided with a valve seat seal 318, i.e., the first valve seat 312 and the second valve seat 314 themselves cooperate with the seal 100 to effect a seal. In accordance with the present invention, a valve seat seal 318 may be provided on one or both of the first valve seat 312 and the second valve seat 314. For example, the valve seat gasket 318 may be disposed on a surface of the valve seat downstream of the fluid passageway (e.g., on the side where no fluid is present when the sealing valve is closed or sealing is effected) to improve the sealing effect or prevent wear. The valve seat seal 318 may be constructed of a heat resistant metallic material or a heat resistant non-metallic material. The utility model breaks through the limitation that reliable sealing can be realized only by adopting the traditional organic polymer or rubber superelastic sealing material, and the valve plate and the valve seat sealing gasket can be made of heat-resistant metal materials or heat-resistant nonmetal materials, so that the wide temperature resistance range of-100-900 ℃ is realized, and the application under the working conditions of high temperature and low temperature can be realized.
In this embodiment, the expansion of the sealed cavity 130 of the seal 100 brings the first valve plate 112 and the second valve plate 114 away from each other in the axial direction. As the filling amount of the fluid medium gradually increases, the distance between the first valve plate 112 and the second valve plate 114 gradually increases, and when the distance reaches the preset distance, the first valve plate 112 and the second valve plate 114 start to contact the first valve seat 312 and the second valve seat 314, respectively (when the valve seat packing 318 is provided, the valve seat packing 318 of the first valve seat 312 and the second valve seat 314), that is, the sealing surface of the seal 100 starts to contact the sealing surface that is mated therewith, thereby achieving sealing. When the sealed cavity 130 of the seal 100 contracts, the first valve plate 112 and the second valve plate 114 are driven to approach each other along the axial direction, and when the distance between the first valve plate 112 and the second valve plate 114 is smaller than the preset distance, the first valve plate 112 and the second valve plate 114 are respectively separated from the first valve seat 312 and the second valve seat 314 (when the valve seat gasket 318 is provided, the valve seat gaskets 318 of the first valve seat 312 and the second valve seat 314), that is, the sealing surface of the seal 100 is separated from the sealing surface matched with the sealing surface, so that the sealing is released.
In the present embodiment, valve seat gaskets 318 are disposed on the surfaces of the first valve seat 312 and the second valve seat 314, and the valve seat gasket 318 of the first valve seat 312 is made of a different material from the valve seat gasket 318 of the second valve seat 314. For example, the valve seat seal 318 located on the surface of the valve seat downstream of the fluid passage may be composed of a heat-resistant metal material, while the valve seat seal 318 located on the surface of the valve seat upstream of the fluid passage may be composed of a heat-resistant non-metal material.
In this embodiment, valve plate drive mechanism cavity 340 is in communication with seal passage 316 for receiving valve plate drive connector 210 and fluid medium hose 220, and for receiving seal 100 when seal 100 is out of engagement with the valve seats (i.e., first valve seat 312 and second valve seat 314). As shown in fig. 10 and 11, the mounting position of the sealing valve 300 is vertical. The valve plate drive mechanism chamber 340 is disposed in the vertical direction (i.e., z direction) at the upper portion of the valve body 310. Drive actuator 320 is mounted to the upper end of disc drive mechanism chamber 340, and drive actuator 320 is connected to first disc 112 and second disc 114 of seal 100 via disc drive connector 210 and drives first disc 112 and second disc 114 of seal 100 to effect a change in position of first disc 112 and second disc 114 of seal 100. When sealing valve 300 is opened, actuator 320 lifts first and second valve plates 112 and 114 of seal 100 via valve plate drive connector 210 to be positioned within valve plate drive mechanism cavity 340. When the sealing valve 300 is closed, the actuator 320 drives the first valve plate 112 and the second valve plate 114 of the seal 100 through the valve plate drive connector 210 to be located in the seal passage 316 of the valve body 310 at positions corresponding to the first valve seat 312 and the second valve seat 314 (or the valve seat packing 318 provided on the valve seat surfaces).
In the present embodiment, the sealing valve 300 is installed vertically, and the valve plate driving connector 210 can be a flexible connector such as a wire rope, a chain, or a hinge, or a rigid connector such as a lead screw, a rack, a rigid shaft, or the like.
Fig. 12 is a front view and fig. 13 is a side sectional view of a second embodiment of the sealing valve according to the present invention. The second embodiment of the sealing valve 300 shown in fig. 12 and 13 is similar to the first embodiment of the sealing valve 300 shown in fig. 10 and 11, except that the seal 100 in the seal assembly 200 of the sealing valve 300 comprises two or more resilient walls 120. The seal assembly 200 comprised in the sealing valve 300 of the present embodiment may be the seal assembly 200 described in connection with fig. 8 and 9, and the seal 100 comprised in the seal assembly 200 may be the seal 100 described in connection with fig. 3 and 4. By providing two or more resilient walls 120 to form two or more enclosed cavities 130, the spacing between the first valve plate 112 and the second valve plate 114 can be adjusted more uniformly and consistently than if the seal 100 included a single resilient wall 120, thereby facilitating improved sealing of the sealing valve 300 and disengagement of the sealing surface of the seal 100 of the sealing valve 300 from its mating sealing surface.
Fig. 14 is a front view and fig. 15 is a side sectional view of a third embodiment of a sealing valve according to the present invention. The third embodiment of the sealing valve 300 shown in fig. 14 and 15 is similar to the first embodiment of the sealing valve 300 shown in fig. 10 and 11 and the second embodiment of the sealing valve 300 shown in fig. 12 and 13, except that the mounting position of the sealing valve 300 is vertically mounted and the overall planar shape of the seal 100 in the seal assembly 200 of the sealing valve 300 is circular. The seal assembly 200 comprised in the sealing valve 300 of the present embodiment may be the seal assembly 200 described in connection with fig. 8 and 9, and the seal 100 comprised in the seal assembly 200 may be the seal 100 described in connection with fig. 5.
In the present embodiment, the mounting position of the sealing valve 300 is horizontal mounting, and the valve plate drive connector 210 may be a rigid connection such as a lead screw, a rack, a rigid shaft, or the like.
In this embodiment, valve seat gaskets 318 may be disposed on both surfaces of the first valve seat 312 and the second valve seat 314. The valve seat seal 318 of the first valve seat 312 is composed of a different material than the valve seat seal 318 of the second valve seat 314. For example, the valve seat seal 318 of the surface of the first valve seat 312 may be composed of a heat-resistant metal material, and the valve seat seal 318 of the surface of the valve seat located upstream of the fluid passage may be composed of a heat-resistant non-metal material. Alternatively, no valve seat seal 318 may be disposed on the surface of the second valve seat 314.
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 utility model 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 (20)

1. A seal comprising a first valve plate, a second valve plate, and one or more resilient walls disposed between the first valve plate and the second valve plate,
the first valve plate is fixed to a first end of the elastic wall, and the second valve plate is fixed to a second end of the elastic wall opposite to the first end,
the first valve plate, the second valve plate and each elastic wall form a closed cavity which can be filled with or flow out of fluid medium,
the elastic wall is stretchable in a direction normal to the first valve plate or the second valve plate, the closed cavity is expanded upon fluid medium charging, and the first valve plate and the second valve plate move in directions away from each other, and
the closed chamber contracts when the fluid medium flows out, and the elastic force of the elastic wall moves the first valve plate and the second valve plate toward the direction in which they approach each other.
2. The seal of claim 1, wherein the seal comprises two or more resilient walls uniformly arranged along the periphery of the first and second valve plates, the first, second and resilient walls forming two or more enclosed cavities, and the two or more enclosed cavities being in fluid communication with each other to allow the passage of a fluid medium.
3. The seal according to claim 1 or 2, wherein the elastic wall is a bellows having a corrugated cross section and a wave number of not less than 1, and is composed of a non-metallic superelastic material or a metallic material.
4. The seal of claim 1, further comprising two or more resilient members disposed between the first valve plate and the second valve plate, a first end of each resilient member being connected to the first valve plate, a second end of each resilient member being connected to the second valve plate, and each resilient member being configured to move the first valve plate and the second valve plate toward one another upon contraction of the enclosed cavity.
5. The seal of claim 4, further comprising two or more guide sleeves and guide shafts arranged in one-to-one correspondence with the elastic member,
the guide sleeve is disposed around the elastic member, and a first end of the guide sleeve is fixed to the first valve plate,
a first end of the guide shaft is disposed within the guide sleeve, a second end of the guide shaft is fixed to the second valve plate, and the guide shaft and the guide sleeve are clearance-fitted, and
the second end of the elastic member is fixed to the first end of the guide shaft.
6. The seal of claim 5, wherein said resilient member, said guide sleeve and said guide shaft are disposed within said enclosed cavity.
7. A seal according to claim 4, wherein the number of resilient members is equal to the number of resilient walls and each resilient member is disposed within a closed cavity formed by the corresponding resilient wall.
8. The seal of claim 4, wherein the two or more resilient members are evenly arranged along the periphery of the first and second valve plates.
9. The seal of claim 1, wherein the first valve plate and the second valve plate are rigid valve plates, the first valve plate and the second valve plate are arranged parallel to each other, and the first valve plate and the second valve plate are constructed of a heat resistant metallic material or a heat resistant non-metallic material.
10. The seal of claim 1, further comprising a valve plate connecting plate and a valve plate connecting pin, the valve plate connecting plate fixedly connected to the first valve plate and the second valve plate, respectively, and the valve plate connecting pin movably connected to the first valve plate and the second valve plate, respectively.
11. The seal of claim 10, wherein the valve plate coupling plate comprises first and second valve plate coupling plates secured to outer edges of the first and second valve plates, respectively,
the first and second valve plate connecting plates include first and second pin holes, respectively, extending through the plate body and aligned with each other, and
the valve plate connecting pin is movably connected to the first valve plate connecting plate and the second valve plate connecting plate through the first pin hole and the second pin hole.
12. The seal of claim 11, wherein the valve plate connecting pin comprises a first pin segment, a second pin segment, and a connecting segment connecting the first pin segment and the second pin segment, and
the first pin section and the second pin section are parallel to the normal direction of the first valve plate or the second valve plate and are in a straight shape, and the connecting section is in a semicircular shape.
13. The seal of claim 12, wherein the first pin segment extends through the first pin bore, a first end of the first pin segment distal from the connecting segment emerges from the first pin bore, the second pin segment extends through the second pin bore, and a second end of the second pin segment distal from the connecting segment emerges from the second pin bore, and
the valve plate connecting pin further includes a first stopper portion disposed at the first end of the first pin section for preventing the first valve plate connecting plate from being detached from the first pin section, and a second stopper portion disposed at the second end of the second pin section for preventing the second valve plate connecting plate from being detached from the second pin section.
14. A seal assembly comprising a valve plate drive connector, a fluid media hose, and a seal according to any of claims 1-13, wherein the seal is driven in translation by the valve plate drive connector, and the fluid media hose is in communication with the enclosed cavity for delivery of fluid media to or from the enclosed cavity.
15. A sealing valve comprising a valve body, an actuation actuator, and a seal assembly according to claim 14, wherein the actuation actuator is configured to actuate the valve plate actuation connector to translate the seal to or from a position of engagement with a valve seat of the valve body.
16. The sealing valve according to claim 15, characterized in that said sealing valve further comprises a fluid medium charging and discharging device, said fluid medium charging and discharging device being in communication with said fluid medium hose, through which fluid medium is transported to or from said closed cavity,
after the sealing element is translated to the position matched with the valve seat, the fluid medium charging and discharging device increases the amount of the fluid medium charged into the closed cavity, the closed cavity expands, the first valve plate and the second valve plate abut against the sealing surface of the valve seat to realize sealing, and in addition, the first valve plate and the second valve plate abut against the sealing surface of the valve seat to realize sealing
Before the sealing element is just separated from the position matched with the valve seat, the fluid medium charging and discharging device discharges or extracts the fluid medium, the closed cavity contracts, and the first valve plate and the second valve plate are separated from the sealing surface of the valve seat to remove the sealing.
17. The sealing valve according to claim 15, characterized in that said valve body comprises a seal channel opening in a central position in a direction perpendicular to the normal direction of said first valve plate or said second valve plate and a first valve seat and a second valve seat arranged respectively on both sides of said seal channel.
18. The sealing valve according to claim 17, wherein said valve body further comprises a valve seat seal disposed on a surface of at least one of said first valve seat and said second valve seat, said valve seat seal being composed of a heat-resistant metallic material or a heat-resistant non-metallic material.
19. The sealing valve according to claim 18, characterized in that valve seat gaskets are arranged on the surfaces of said first and second valve seats, and in that the valve seat gasket of said first valve seat is made of a different material than the valve seat gasket of said second valve seat.
20. The sealing valve according to any one of claims 17 to 19, further comprising a valve plate drive mechanism chamber communicating with said seal channel for accommodating said valve plate drive connector and said fluid medium hose and accommodating said seal when said seal is out of a position of engagement with a valve seat, and
the valve plate driving connector is a lead screw, a rack or a rigid shaft.
CN202122407111.2U 2021-09-30 2021-09-30 Seal, seal assembly and sealing valve Active CN216200682U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113719624A (en) * 2021-09-30 2021-11-30 洛阳明远石化技术有限公司 Seal, seal assembly and sealing valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113719624A (en) * 2021-09-30 2021-11-30 洛阳明远石化技术有限公司 Seal, seal assembly and sealing valve

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