CN115264087A - Three-eccentric butterfly valve capable of being sealed in two directions - Google Patents

Three-eccentric butterfly valve capable of being sealed in two directions Download PDF

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Publication number
CN115264087A
CN115264087A CN202211186515.6A CN202211186515A CN115264087A CN 115264087 A CN115264087 A CN 115264087A CN 202211186515 A CN202211186515 A CN 202211186515A CN 115264087 A CN115264087 A CN 115264087A
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CN
China
Prior art keywords
valve
butterfly
plate
valve seat
movable
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Granted
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CN202211186515.6A
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Chinese (zh)
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CN115264087B (en
Inventor
余承善
胡国先
戴小名
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Jiangsu Datian Valve Manufacturing Co ltd
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Jiangsu Datian Valve Manufacturing Co ltd
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Priority to CN202211186515.6A priority Critical patent/CN115264087B/en
Publication of CN115264087A publication Critical patent/CN115264087A/en
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Publication of CN115264087B publication Critical patent/CN115264087B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0218—Butterfly valves

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

The invention belongs to the technical field of triple eccentric butterfly valves, and particularly relates to a triple eccentric butterfly valve capable of being sealed in a two-way mode. The three-eccentric butterfly valve capable of being sealed in two directions comprises a valve body, wherein a valve shaft and a butterfly plate are arranged in the valve body, the valve shaft is eccentrically arranged on the bottom surface of the butterfly plate, the butterfly plate is divided into a first plate block and a second plate block by the projection of the axis of the valve shaft on the butterfly plate, a sealing assembly comprises a fixed valve seat and a movable valve seat, the area of the first plate block on the side, away from the valve shaft, of the butterfly plate is larger than that of the second plate block, and the area of the end face of the movable valve seat on the side, away from the valve shaft, of the movable valve seat is larger than the difference between the areas of the first plate block and the second plate block on the side, away from the valve shaft, of the butterfly plate. When the butterfly valve is used, the movable valve seat can push the butterfly plate which deflects at a small angle, so that the butterfly plate is reset, and then the butterfly plate keeps sealed with the movable sealing ring on the fixed valve seat and keeps sealed with the inner wall surface of the movable valve seat, so that the liquid leakage is not easy to occur.

Description

Three-eccentric butterfly valve capable of being sealed in two directions
Technical Field
The invention belongs to the technical field of triple eccentric butterfly valves, and particularly relates to a triple eccentric butterfly valve capable of being sealed in a two-way mode.
Background
The butterfly valve is also called a flap valve, and is a regulating valve with simple structure, the butterfly valve opening and closing part is a disc-shaped butterfly plate, and the butterfly plate rotates around a corresponding axis in the valve body, so that the aim of opening, closing or regulating the medium flow is fulfilled. The butterfly valve has the advantages of simple structure, small volume, light weight, less material consumption, small installation size, small driving moment, simple and convenient operation and rapidness, and simultaneously has good flow regulation function and sealing closing characteristic, thereby being one of the fastest valve varieties developed in the last ten years. The butterfly valve is divided into a center sealing butterfly valve, a single eccentric sealing butterfly valve, a double eccentric sealing butterfly valve and a triple eccentric sealing butterfly valve according to the structural form, for example, chinese patent CN110081189B discloses a bidirectional triple eccentric butterfly valve.
The three-eccentric butterfly valve has three eccentric structures, wherein the first eccentricity means that an eccentric size, namely axial eccentricity, exists between a valve rod axis and a radial sealing surface of a butterfly plate, the second eccentricity means that an eccentric size, namely radial eccentricity, exists between the valve rod axis and a channel axis of a valve body, and the third eccentricity means that an oblique cone angle, namely angular eccentricity, exists between a valve seat seal and the channel axis of the valve body. When the existing triple-eccentric butterfly valve is used, due to factors such as machining errors and assembly errors, when liquid pressure acts on the butterfly plate, the butterfly plate inevitably deflects at a small angle, so that a gap is formed between the curved surface of the oblique cone frustum and the inner wall surface of the valve seat, and the sealing effect of the valve seat is poor.
Disclosure of Invention
Therefore, it is necessary to provide a three-eccentric butterfly valve capable of performing two-way sealing to solve the problem of poor sealing effect of the three-eccentric butterfly valve in the prior art.
The above purpose is realized by the following technical scheme:
a triple offset butterfly valve that is bi-directionally sealable, comprising:
the valve shaft is eccentrically arranged on the bottom surface of the butterfly plate, the butterfly plate is divided into a first plate block and a second plate block by the projection of the axis of the valve shaft on the butterfly plate, the valve shaft can drive the butterfly plate to rotate to open or close the valve body by rotation, and the outer peripheral surface of the butterfly plate is a first inclined truncated cone curved surface;
the sealing assembly is used for sealing a gap between the butterfly plate and the inner wall surface of the valve body and comprises a fixed valve seat and a movable valve seat, a second oblique circular truncated cone curved surface matched with the first oblique circular truncated cone curved surface is arranged on the inner wall surface of the fixed valve seat, an annular sunken groove is arranged on the inner wall surface of the valve body, the outer peripheral surface of the movable valve seat is in guide sliding fit with the groove bottom of the annular sunken groove, the outer peripheral surface of the movable valve seat is in sealing fit with the groove bottom of the annular sunken groove, a third oblique circular truncated cone curved surface matched with the first oblique circular truncated cone curved surface is arranged on the inner wall surface of the movable valve seat, the third oblique circular truncated cone curved surface can slide along the surface of the first oblique circular truncated cone, the area of a first plate block on one side of the butterfly plate, which is far away from the valve shaft, is larger than the area of a second plate block, the area of the end surface of the movable valve seat, which is far away from the valve shaft, is larger than the difference between the first plate block and the second plate block on one side of the butterfly plate, a plurality of communication through holes are formed in the fixed valve seat, and are used for liquid to enter the gap between the movable valve seat;
a control assembly for driving rotation of the valve shaft.
Furthermore, the fixed valve seat comprises a fixed valve casing and a movable sealing ring arranged in the fixed valve casing, an annular groove is formed in the fixed valve casing, the movable sealing ring is arranged in the annular groove, the diameter of the movable sealing ring is smaller than that of the annular groove, the movable sealing ring can move in the annular groove, and the inner wall surface of the movable sealing ring and the inner wall surface of the fixed valve casing are used for forming a second inclined circular truncated cone curved surface.
Furtherly, be fixed with the axle sleeve on the terminal surface that deviates from movable valve seat of butterfly plate, the projection of axle sleeve on the butterfly plate divides first plate and second plate into the butterfly plate, and the valve shaft is coaxial to be worn to adorn in the axle sleeve and to be stopped to rotate with the axle sleeve and cooperate.
Furthermore, a support is fixed on the end face of the butterfly plate, which is far away from the valve seat, and the shaft sleeve is fixed on the support.
Further, seal assembly still includes the structure of splining, and the structure of splining is used for preventing movable valve seat from rotating in circumference, and the structure of splining includes a plurality ofly and the only rotary column of connecting the one-to-one cartridge together, and the only rotary column is fixed on movable valve seat, is provided with the axially extended breach along the only rotary column on the only rotary column, and the clearance between the internal face of breach and the internal face of connecting the through-hole supplies liquid to pass through.
Furthermore, the control assembly comprises a hand wheel assembly and a transmission assembly, the transmission assembly is in transmission connection with the valve shaft, and the hand wheel assembly is used for driving the transmission assembly to act.
Furthermore, the transmission assembly comprises a first bevel gear and a second bevel gear which are meshed with each other, the hand wheel assembly comprises a hand wheel and a driving shaft fixedly connected with the hand wheel, the first bevel gear is fixed on the driving shaft, and the second bevel gear is fixed on the valve shaft.
The invention has the beneficial effects that: when the three-eccentric butterfly valve capable of being sealed in two directions is used, the butterfly plate divides the valve body into two chambers, when the chamber of the liquid charging valve body, which is far away from the valve shaft, acts on the plate surface of the butterfly plate, and as the area of the first plate block on the side, which is far away from the valve shaft, of the butterfly plate is larger than that of the second plate block, the liquid pressure borne by the first plate block is larger than that borne by the second plate block, and the butterfly plate can deflect in a small angle. In the process, liquid can enter the space between the movable valve seat and the fixed valve seat through the communication through hole, so that the movable valve seat can receive liquid pressure, the area of the end face of one side of the movable valve seat, which is far away from the valve shaft, is larger than the difference between the areas of the first plate and the second plate of one side of the butterfly plate, which is far away from the valve shaft, the liquid pressure received by the movable valve seat is larger than the difference between the liquid pressure on the first plate and the liquid pressure on the second plate, and the movable valve seat can slide in the annular sinking groove along the axial direction due to the guiding sliding fit between the outer peripheral surface of the movable valve seat and the groove bottom of the annular sinking groove and is tightly attached to the side wall of the annular sinking groove, so that the butterfly plate which deflects at a small angle is pushed in the process, the butterfly plate is reset, and the movable sealing ring on the butterfly plate and the fixed valve seat can keep sealed with the inner wall surface of the movable valve seat, and the liquid leakage is not easy to occur.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment 1 of a triple offset butterfly valve capable of bidirectional sealing according to the present invention;
FIG. 2 is an exploded view of the components of the triple offset butterfly valve of FIG. 1 that may be bi-directionally sealed;
FIG. 3 is a partial enlarged view of FIG. 2 at A;
FIG. 4 is a schematic diagram of a portion of the structure of FIG. 1;
FIG. 5 is a top sectional view of FIG. 4;
FIG. 6 is an elevational, cross-sectional view of FIG. 4;
fig. 7 is a partial enlarged view at B of fig. 6;
FIG. 8 is a schematic structural view of the butterfly plate of FIG. 1;
FIG. 9 is a schematic view of the butterfly plate of FIG. 8 from a first perspective;
FIG. 10 is a schematic view of the butterfly plate of FIG. 8 from a second perspective;
wherein:
100. a valve body; 110. a flange plate; 120. a connecting cylinder; 130. packing and sealing; 132. a packing member; 140. a convex section; 142. an annular sinking groove;
200. a valve shaft;
300. a butterfly plate; 310. a first inclined truncated cone curved surface; 320. a support; 330. a shaft sleeve;
410. a fixed valve seat; 412. fixing the valve shell; 414. a movable sealing ring; 416. a communication via hole; 420. a movable valve seat; 422. a rotation stopping column; 424. a notch;
510. a transmission housing; 520. a handwheel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below by way of embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The numbering of the components themselves, such as "first", "second", etc., is used herein only to distinguish between the objects depicted and not to have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed and operated in specific orientations, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The invention will be described with reference to the drawings and the detailed description of the invention.
Embodiment 1 of a triple offset butterfly valve capable of bidirectional sealing according to the present invention:
as shown in fig. 1 to 10, the triple offset butterfly valve capable of bidirectional sealing of the present embodiment includes a valve body 100, a valve shaft 200, a butterfly plate 300, a sealing assembly and a control assembly, the sealing assembly includes a fixed valve seat 410 and a movable valve seat 420, the valve body 100 is cylindrical and has a passage inside, and the sealing assembly and the butterfly plate 300 are both disposed in the passage of the valve body 100. A flange 110 is provided on the outer circumferential surface of the valve body 100, a shaft hole penetrating the wall surface of the valve body 100 is provided in the flange 110, and the valve shaft 200 penetrates the valve body 100 through the shaft hole. The flange plate 110 is fixed with a connecting cylinder 120, the control component comprises a hand wheel 520 component and a transmission component, the transmission component is in transmission connection with the valve shaft 200, and the hand wheel 520 component is used for driving the transmission component to act. In order to prevent liquid leakage, a packing seal 130 is fixed in the connecting cylinder 120, the valve shaft 200 penetrates through the packing seal 130, and a pressing force is generated between the packing 132 and the valve shaft 200 to form a dynamic seal.
The transmission assembly comprises a transmission shell 510, a first bevel gear and a second bevel gear which are meshed with each other, the first bevel gear and the second bevel gear are located in the transmission shell 510, the transmission shell 510 is fixedly connected with the other end of the connecting cylinder 120, the valve shaft 200 penetrates through the connecting cylinder 120 and extends into the transmission shell 510, the hand wheel 520 assembly comprises a hand wheel 520 and a driving shaft fixedly connected with the hand wheel 520, the first bevel gear is fixed on the driving shaft, and the second bevel gear is fixed on the valve shaft 200.
The butterfly plate 300 is in a right-angled oblique truncated cone shape, the outer peripheral surface of the butterfly plate 300 is a first oblique truncated cone curved surface 310, the area of the first end surface of the butterfly plate 300 is larger than that of the second end surface, the first end surface faces away from the fixed valve seat 410, a support 320 is fixed on the first end surface of the butterfly plate 300, a shaft sleeve 330 is fixed on the support 320, the projection of the axis of the shaft sleeve 330 on the butterfly plate 300 is located between the longest bus and the shortest bus of the butterfly plate 300, the butterfly plate 300 is divided into a first plate and a second plate, an eccentric size is formed between the axis of the valve shaft 200 and the channel axis of the valve body 100, and the area of the first plate on the side of the butterfly plate 300, which is far away from the valve shaft 200, is larger than that of the second plate. The valve shaft 200 penetrates through the shaft sleeve 330 and is matched with the valve sleeve in a rotation stopping manner, specifically, a key groove is formed in the inner wall of the shaft sleeve 330, a key matched with the key groove is arranged on the valve shaft 200, and the valve shaft 200 and the valve sleeve are matched in a rotation stopping manner through the key and the key groove.
The sealing assembly is used for sealing a gap between the butterfly plate 300 and the inner wall of the valve body 100, in order to achieve the requirement, the fixed valve seat 410 and the movable valve seat 420 are arranged between the butterfly plate 300 and the inner wall of the valve body 100, specifically, the fixed valve seat 410 is fixed on the inner wall of the valve body 100, the fixed valve seat 410 is annular, the inner wall surface of the fixed valve seat 410 is a third oblique circular truncated cone curved surface matched with the first oblique circular truncated cone curved surface 310, when liquid enters from a chamber facing the first end surface of the butterfly plate 300, the butterfly plate 300 is pushed by the liquid, the first oblique circular truncated cone curved surface 310 of the butterfly plate 300 is attached to the third oblique circular truncated cone curved surface of the fixed valve seat 410, so that the sealing between the butterfly plate 300 and the sealing assembly is tighter, and the liquid is prevented from leaking into the chamber facing the second end surface of the butterfly plate 300. The fixed valve seat 410 comprises a fixed valve casing 412 and a movable sealing ring 414 arranged in the fixed valve casing 412, an annular groove is formed in the fixed valve casing 412, the movable sealing ring 414 is arranged in the annular groove, the diameter of the movable sealing ring 414 is smaller than that of the annular groove, so that the movable sealing ring 414 can move in the annular groove, and when the movable sealing ring 414 is attached to the butterfly plate 300, the inner wall surface of the movable sealing ring 414 and the inner wall surface of the fixed valve casing 412 participate in forming a second inclined circular truncated cone curved surface.
The outer peripheral surface of the valve body 100 is provided with a convex section 140, the inner wall surface of the valve body 100 is provided with an annular sunken groove 142, the annular sunken groove 142 sinks into the convex section 140, the outer peripheral surface of the movable valve seat 420 is provided with a cylindrical surface which is in guide sliding fit with the groove bottom of the annular sunken groove 142, the cylindrical surface is in sealing fit with the groove bottom of the annular sunken groove 142, the inner wall surface of the movable valve seat 420 is provided with a third oblique circular truncated cone curved surface which is matched with the first oblique circular truncated cone curved surface 310, wherein the diameter of the movable valve seat 420 is larger than that of the fixed valve seat 410, and the movable valve seat 420 is positioned between the valve shaft 200 and the fixed valve seat 410. When the movable valve seat 420 is pushed by the liquid, the third truncated cone curved surface slides along the first truncated cone surface. It should be noted that, the valve body 100 is assembled by two cylinder segments in an assembled structure, and during assembly, the movable valve seat 420 is first installed in the annular sinking groove 142, and then the two cylinder segments are fixedly connected together, so that the movable valve seat 420 cannot be separated from the annular sinking groove 142.
In order to enable the movable valve seat 420 to correct the rotation of the butterfly plate 300 and improve the sealing effect, the area of the end surface of one side of the movable valve seat 420, which is far away from the valve shaft 200, is larger than the difference between the areas of the first plate and the second plate of one side of the butterfly plate 300, which is far away from the valve shaft 200, a plurality of communication through holes 416 are arranged on the fixed valve seat 410, the communication through holes 416 are used for allowing liquid to enter a gap between the movable valve seat 420 and the fixed valve seat 410, and when the liquid enters a cavity towards which the second end surface of the butterfly plate 300 faces, the liquid can enter the gap between the movable valve seat 420 and the fixed valve seat 410 through the communication through holes 416 and push the movable valve seat 420 to move.
In order to avoid circumferential rotation of the movable valve seat 420 in the annular sinking groove 142, the sealing assembly in this embodiment further includes a rotation stopping structure, specifically, the rotation stopping structure includes a plurality of rotation stopping posts 422 inserted into the communication through holes 416 in a one-to-one correspondence manner, the rotation stopping posts 422 are fixed on the movable valve seat 420, notches 424 extending in the axial direction of the rotation stopping posts 422 are formed in the rotation stopping posts 422, and gaps between inner wall surfaces of the notches 424 and inner wall surfaces of the communication through holes 416 are provided for liquid to pass through.
The use process of the three-eccentric center butterfly valve capable of being sealed in two directions of the embodiment is as follows:
when the cavity towards which the second end face of the butterfly plate 300 faces is filled with liquid, the liquid pressure acts on the plate surface of the butterfly plate 300, and because the area of the first plate on the side of the butterfly plate 300 departing from the valve shaft 200 is larger than that of the second plate, the liquid pressure borne by the first plate is larger than that borne by the second plate, and the butterfly plate 300 can deflect at a small angle in consideration of machining errors, assembly errors and other factors. In the process, liquid enters between the movable valve seat 420 and the fixed valve seat 410 through a gap between the notch 424 on the rotation stopping column 422 and the inner wall of the communication through hole 416, so that the movable valve seat 420 can also bear liquid pressure, because the area of the end surface of one side of the movable valve seat 420, which is far away from the valve shaft 200, is larger than the difference between the areas of the first plate and the second plate of one side of the butterfly plate 300, which is far away from the valve shaft 200, the liquid pressure borne by the movable valve seat 420 is larger than the difference between the liquid pressure on the first plate and the liquid pressure on the second plate, and because the outer peripheral surface of the movable valve seat 420 is in guiding sliding fit with the groove bottom of the annular sunken groove 142, the movable valve seat 420 slides in the axial direction in the annular sunken groove 142 and clings to the side wall of the annular sunken groove 142, the butterfly plate 300, which deflects at a small angle is pushed in the process, so that the butterfly plate 300 is restored, and further the movable sealing ring 414 on the fixed valve seat 410 keeps sealed with the inner wall surface of the movable valve seat 420, and liquid leakage is not easy to occur.
When the two chambers need to be communicated, the hand wheel 520 is rotated, the valve shaft 200 rotates, and then the butterfly plate 300 rotates around the valve shaft 200, during the rotation process of the butterfly plate 300, when one part of the outer peripheral surface of the butterfly plate 300 does not press the corresponding part of the movable sealing ring 414 any more, the other part of the outer peripheral surface of the butterfly plate 300 can push a part of the ring section of the movable sealing ring 414, and because the movable sealing ring 414 can move in the annular sunken groove 142, the other part of the ring section of the movable sealing ring 414 can be exposed from the annular sunken groove 142, when the two chambers need to be isolated, the hand wheel 520 is rotated reversely, the butterfly plate 300 returns and returns the movable sealing ring 414 to the original position, and a seal is formed between the movable sealing ring 414 and the butterfly plate 300.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (7)

1. A triple offset butterfly valve capable of bidirectional sealing, comprising:
the valve shaft is eccentrically arranged on the bottom surface of the butterfly plate, the butterfly plate is divided into a first plate block and a second plate block by the projection of the axis of the valve shaft on the butterfly plate, the valve shaft can drive the butterfly plate to rotate to open or close the valve body by rotation, and the outer peripheral surface of the butterfly plate is a first inclined truncated cone curved surface;
the sealing assembly is used for sealing a gap between the butterfly plate and the inner wall surface of the valve body and comprises a fixed valve seat and a movable valve seat, a second oblique circular truncated cone curved surface matched with the first oblique circular truncated cone curved surface is arranged on the inner wall surface of the fixed valve seat, an annular sunken groove is arranged on the inner wall surface of the valve body, the outer peripheral surface of the movable valve seat is in guide sliding fit with the groove bottom of the annular sunken groove, the outer peripheral surface of the movable valve seat is in sealing fit with the groove bottom of the annular sunken groove, a third oblique circular truncated cone curved surface matched with the first oblique circular truncated cone curved surface is arranged on the inner wall surface of the movable valve seat, the third oblique circular truncated cone curved surface can slide along the surface of the first oblique circular truncated cone, the area of a first plate block on one side of the butterfly plate, which is far away from the valve shaft, is larger than the area of a second plate block, the area of the end surface of the movable valve seat, which is far away from the valve shaft, is larger than the difference between the first plate block and the second plate block on one side of the butterfly plate, a plurality of communication through holes are formed in the fixed valve seat, and are used for liquid to enter the gap between the movable valve seat;
and the control assembly is used for driving the valve shaft to rotate.
2. The triple offset butterfly valve capable of bidirectional sealing according to claim 1, wherein the fixed valve seat includes a fixed valve housing and a movable sealing ring disposed in the fixed valve housing, an annular groove is disposed in the fixed valve housing, the movable sealing ring is disposed in the annular groove, and a diameter of the movable sealing ring is smaller than a diameter of the annular groove, so that the movable sealing ring can move in the annular groove, and an inner wall surface of the movable sealing ring and an inner wall surface of the fixed valve housing are used to form a second truncated cone curved surface.
3. The triple offset butterfly valve capable of sealing bidirectionally as claimed in claim 2, wherein a shaft sleeve is fixed to an end surface of the butterfly plate facing away from the movable valve seat, a projection of the shaft sleeve on the butterfly plate divides the butterfly plate into a first plate and a second plate, and the valve shaft is coaxially inserted into the shaft sleeve and is engaged with the shaft sleeve in a rotation-stopping manner.
4. A triple offset butterfly valve with bi-directional sealing according to claim 3, wherein a bracket is fixed to the end face of the butterfly plate facing away from the valve seat, and the sleeve is fixed to the bracket.
5. The triple offset butterfly valve of claim 4, wherein the seal assembly further comprises a rotation stop structure for preventing the movable valve seat from rotating in the circumferential direction, the rotation stop structure comprises a plurality of rotation stop posts inserted into the communication through holes in a one-to-one correspondence manner, the rotation stop posts are fixed on the movable valve seat, notches extending in the axial direction of the rotation stop posts are formed in the rotation stop posts, and gaps between inner wall surfaces of the notches and inner wall surfaces of the communication through holes are used for liquid to pass through.
6. A triple offset butterfly valve with bi-directional sealing according to any one of claims 1 to 5, wherein the control assembly comprises a hand wheel assembly and a transmission assembly, the transmission assembly is in transmission connection with the valve shaft, and the hand wheel assembly is used for driving the transmission assembly to move.
7. The triple offset butterfly valve capable of being sealed in two directions according to claim 6, wherein the transmission assembly comprises a first bevel gear and a second bevel gear which are engaged with each other, the hand wheel assembly comprises a hand wheel and a driving shaft fixedly connected with the hand wheel, the first bevel gear is fixed on the driving shaft, and the second bevel gear is fixed on the valve shaft.
CN202211186515.6A 2022-09-28 2022-09-28 Three-eccentric butterfly valve capable of being sealed in two directions Active CN115264087B (en)

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CN202211186515.6A CN115264087B (en) 2022-09-28 2022-09-28 Three-eccentric butterfly valve capable of being sealed in two directions

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202733009U (en) * 2012-08-09 2013-02-13 北京艺创阀门制造有限公司 Flange two-way pressure hard sealing butterfly valve
CN203335887U (en) * 2013-07-02 2013-12-11 温州蓝天管件阀门有限公司 Bi-direction sealing triple-eccentric butterfly valve
CN205859174U (en) * 2016-07-30 2017-01-04 温州东特蝶阀有限公司 A kind of butterfly valve
CN207316093U (en) * 2017-09-15 2018-05-04 络科实业集团有限公司 A kind of new three eccentricity double seals butterfly valve
CN209688123U (en) * 2019-01-28 2019-11-26 鞍山瑞科阀门制造有限公司 A kind of two way seal three-eccentric-butterfly-valve
CN213245357U (en) * 2020-09-27 2021-05-21 天工阀门集团有限公司 Three-eccentric self-operated bidirectional pressure metal seal butterfly valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202733009U (en) * 2012-08-09 2013-02-13 北京艺创阀门制造有限公司 Flange two-way pressure hard sealing butterfly valve
CN203335887U (en) * 2013-07-02 2013-12-11 温州蓝天管件阀门有限公司 Bi-direction sealing triple-eccentric butterfly valve
CN205859174U (en) * 2016-07-30 2017-01-04 温州东特蝶阀有限公司 A kind of butterfly valve
CN207316093U (en) * 2017-09-15 2018-05-04 络科实业集团有限公司 A kind of new three eccentricity double seals butterfly valve
CN209688123U (en) * 2019-01-28 2019-11-26 鞍山瑞科阀门制造有限公司 A kind of two way seal three-eccentric-butterfly-valve
CN213245357U (en) * 2020-09-27 2021-05-21 天工阀门集团有限公司 Three-eccentric self-operated bidirectional pressure metal seal butterfly valve

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