CN108547956B - Self-sealing movable butterfly plate low-temperature butterfly valve - Google Patents
Self-sealing movable butterfly plate low-temperature butterfly valve Download PDFInfo
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- CN108547956B CN108547956B CN201810522534.9A CN201810522534A CN108547956B CN 108547956 B CN108547956 B CN 108547956B CN 201810522534 A CN201810522534 A CN 201810522534A CN 108547956 B CN108547956 B CN 108547956B
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- sealing
- butterfly
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- 238000007789 sealing Methods 0.000 title claims abstract description 59
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 241000283216 Phocidae Species 0.000 claims abstract 2
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 10
- 238000012856 packing Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002788 crimping Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- -1 valve rod Species 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- F16K1/228—Movable sealing bodies
- F16K1/2285—Movable sealing bodies the movement being caused by the flowing medium
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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
- F16K1/222—Shaping of the valve member
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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
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/12—Covers for housings
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/535—Mechanical actuating means with toothed gearing for rotating valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The utility model provides a butterfly valve is removed to self sealss, including valve body, valve rod, butterfly plate seal assembly and drive arrangement, valve rod top-down passes the extension pipe in proper order, go up valve neck and lower valve neck, drive arrangement sets up at the top of extension pipe, drive arrangement's power take off end is connected with the upper end transmission of valve rod, butterfly plate seal assembly includes annular clamp plate, the sealing washer, butterfly plate frame and removes the butterfly plate, annular mounting groove has been seted up to valve body right port inner wall, annular clamp plate is fixed the sealing washer in the annular mounting groove, annular clamp plate passes through hold-down bolt and is connected to the valve body right-hand member portion. The invention adopts the movable butterfly plate as the compensation piece, solves the compensation under the low-temperature working condition, utilizes the medium pressure to push the movable butterfly plate to the sealing surface, and has better self-sealing effect as the pressure is higher and the sealing is tighter. The invention can be used for low-temperature medium, medium working conditions at normal temperature and high temperature, and is a novel valve with expansibility and creativity.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to a self-sealing movable butterfly plate low-temperature butterfly valve.
Background
The low-temperature butterfly valve is widely applied to liquid nitrogen LN2, liquid oxygen LO2 and liquefied natural gas pipelines. The butterfly plate of the low-temperature butterfly valve is of an integral casting structure, a valve rod penetrates into a shaft lug on the butterfly plate and is connected with the shaft lug through a cylindrical pin, and a driving device rotates the valve rod to drive the butterfly plate to rotate 0-90 degrees in a channel to open and close a medium. The problem of loose sealing of the butterfly plate exists in the analysis of the existing structure, and the sealing leakage is easy to cause because the butterfly plate contracts when the butterfly plate is cooled below-100 ℃ and the sealing size changes and the butterfly plate is fixed and has no movement compensation function.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a self-sealing movable butterfly plate low-temperature butterfly valve which adopts a split structure and can ensure tightness under the low-temperature condition.
In order to solve the technical problems, the invention adopts the following technical scheme: the self-sealing movable butterfly plate low-temperature butterfly valve comprises a valve body, a valve rod, a butterfly plate sealing assembly and a driving device, wherein an upper valve neck and a lower valve neck are respectively fixedly arranged at the top and the bottom of the valve body, the central lines of the upper valve neck and the lower valve neck coincide, the central line passes through the center of the valve body, the top of the upper valve neck is coaxially connected with an extension pipe, the valve rod sequentially passes through the extension pipe, the upper valve neck and the lower valve neck from top to bottom, the bottom of the lower valve neck is provided with a bottom cover and a sealing gasket, a guide sleeve sleeved outside the valve rod is arranged inside the upper valve neck, a sealing packing and a packing gland assembly are arranged between the inside of the upper end of the extension pipe and the outer wall of the valve rod, the driving device is arranged at the top of the extension pipe, the power output end of the driving device is in transmission connection with the upper end of the valve rod, the butterfly plate sealing assembly comprises an annular pressing plate, a sealing ring, a butterfly plate frame and a movable butterfly plate, an annular mounting groove is formed in the inner wall of a right port of the valve body, the annular pressing plate is fixedly arranged in the annular mounting groove, and the sealing ring is connected to the right end of the valve body by a pressing bolt;
the butterfly plate frame and the movable butterfly plate are both positioned in the valve body, the butterfly plate frame is fixedly connected to the valve rod through cylindrical pins arranged along the radial direction of the valve rod, a plurality of grooves are correspondingly formed between the left sides of the movable butterfly plate, the plurality of grooves are uniformly distributed along the circumferential direction of the movable butterfly plate, compression springs are arranged in the grooves, and the left ends and the right ends of the compression springs are respectively propped against the right sides of the butterfly plate frame and the left sides of the movable butterfly plate; the butterfly plate is connected with the movable butterfly plate through a plurality of connecting screws, the plurality of connecting screws are uniformly distributed along the circumferential direction of the movable butterfly plate, the connecting screws are in threaded connection with the movable butterfly plate, and the rod part of the connecting screws is in loose connection with the movable butterfly plate; under the action of a compression spring, the head of the connecting screw is in compression fit with the butterfly plate frame, and a buffer gap is formed between the butterfly plate frame and the movable butterfly plate; the outer circumferential surface of the movable butterfly plate is of a conical structure with left thick and right thin, and is in crimping sealing fit with the sealing ring.
The mode that connecting screw and the slackening of butterfly plate frame are connected is: the butterfly plate frame is provided with a plurality of countersunk holes, the inner diameter of the left side part of the countersunk holes is larger than that of the right side part, each connecting screw extends into and penetrates through the countersunk holes from left to right, the rod part of each connecting screw is in clearance fit with the thinner right side part of the countersunk holes, and the head part of each connecting screw is arranged in the thicker left side part of the countersunk holes.
The transparent liquid permeation hole of controlling has been seted up at butterfly plate frame middle part, removes the butterfly plate left surface and is provided with the step groove, and butterfly plate frame right side is provided with annular step, and annular step stretches into the step inslot and with step groove side-to-side sliding fit.
The driving device comprises a support, a turbine box and a hand wheel, the support is arranged at the upper end of the extension pipe, a worm gear and worm transmission mechanism is arranged in the turbine box, the upper end of the valve rod penetrates through the support and stretches into the turbine box to be coaxially connected with a worm wheel of the worm gear and worm mechanism, the worm of the worm gear and worm mechanism stretches out of the turbine box, and the hand wheel is coaxially arranged on the worm.
The bottom of the bracket is provided with a rubber protective cover with an open lower end, the rubber protective cover is of a conical structure with a thin upper part and a thick lower part, and the rubber protective cover is sleeved outside the top end of the extension pipe.
By adopting the technical scheme, the integral butterfly plate is designed into two parts, namely the butterfly plate frame and the movable butterfly plate frame. The butterfly plate frame is connected with the valve rod through a cylindrical pin, the movable butterfly plate is connected with the butterfly plate frame through an inner hexagonal connecting screw, and a buffer gap is reserved between the movable butterfly plate and the butterfly plate frame, so that the movable butterfly plate can move in a small gap range. And a plurality of compression springs are added at the middle interval part of the connecting screw distribution circle for pre-tightening and stabilizing the movable butterfly plate.
The working state analysis of the invention: the analysis of medium force to sealing effect of butterfly plate seal assembly during operation rotates the hand wheel, drive the valve rod through worm gear drive mechanism in the turbine case and rotate, when the valve rod drove the butterfly plate frame and close the motion, it rotates and be close to the sealing washer gradually to remove the butterfly plate frame, at this moment, the flow cross-section reduces, medium flow is hindered, left side pressure increases, the medium flows and promotes the little removal of removal butterfly plate right through the liquid-permeable hole on the butterfly plate frame, at this moment, the perpendicular position of the removal butterfly plate that closes in place and the central line of valve body, the medium reaches maximum to the pressure of removal butterfly plate, the effort that promotes removal butterfly plate right has also reached the maximum, because the removal butterfly plate has certain amount of movement, therefore the pressure of medium can promote removal butterfly plate pressure closely sealing washer, the pressure is bigger sealing effect is better, thereby the effect of self-sealing is reached by the pressure effect of medium.
A step groove is formed in the middle of the left side of the movable butterfly plate, and a medium can enter the step groove through a liquid-permeable hole in the butterfly plate frame to push the movable butterfly plate to move rightwards; the sliding fit of the annular step and the step groove limits the movable butterfly plate to move only along the axial direction and not move along the radial direction, so that good sealing performance between the movable butterfly plate and the sealing ring is ensured.
Because the working environment of the invention is that dew is easy to form on the turbine box at the top of the valve rod at low temperature, the rubber protective cover prevents dew on the upper surface from dripping on the valve body below to form thick ice.
In summary, the movable butterfly plate is adopted as the compensation piece, and the compensation piece is designed to compensate displacement caused by size change because each part contracts when cooled under the working condition of a low-temperature medium, and particularly the size change of the sealing surface influences the sealing effect and even leaks. Therefore, the structural form of the invention solves the compensation under the low-temperature working condition, the movable butterfly plate is pushed to the sealing surface by using the medium pressure, the higher the pressure is, the more tightly the sealing is, and the better the self-sealing effect is.
The invention has the advantages of easy realization of structural process, reasonable design and convenient maintenance and replacement, is a novel structure, can be used for low-temperature medium, can also be used for medium working conditions at normal temperature and high temperature, and is a novel valve with development and creativity.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged view of the butterfly plate seal assembly of FIG. 1.
Detailed Description
As shown in fig. 1 and 2, the self-sealing movable butterfly plate low-temperature butterfly valve comprises a valve body 1, a valve rod 2, a butterfly plate sealing assembly 3 and a driving device, wherein an upper valve neck 4 and a lower valve neck 5 are respectively fixedly arranged at the top and the bottom of the valve body 1, the central lines of the upper valve neck 4 and the lower valve neck 5 coincide and pass through the center of the valve body 1, an extension pipe 6 is coaxially connected to the top of the upper valve neck 4, the valve rod 2 sequentially passes through the extension pipe 6, the upper valve neck 4 and the lower valve neck 5 from top to bottom, a bottom cover 7 and a sealing gasket 8 are arranged at the bottom of the lower valve neck 5, a guide sleeve 9 sleeved outside the valve rod 2 is arranged inside the upper valve neck 4, a sealing packing and a packing gland assembly 10 is arranged between the inside the upper end of the extension pipe 6 and the outer wall of the valve rod 2, the driving device is arranged at the top of the extension pipe 6, the power output end of the driving device is in transmission connection with the upper end of the valve rod 2, the butterfly plate sealing assembly 3 comprises an annular pressing plate 11, a sealing ring 12, a butterfly plate 13 and a movable butterfly plate 14, an annular mounting groove is formed in the inner wall of the right port of the valve body 1, the annular pressing plate 11 is fixedly connected to the annular pressing plate 12 through an annular pressing bolt 11, and the right end 15 is connected to the valve body 1; when the sealing ring 12 is worn, the compression bolt 15 can be unscrewed, and the sealing ring 12 can be replaced after the annular pressing plate 11 is removed.
The butterfly plate frame 13 and the movable butterfly plate 14 are both positioned in the valve body 1, the butterfly plate frame 13 is fixedly connected to the valve rod 2 through a cylindrical pin 16 arranged along the radial direction of the valve rod 2, a plurality of grooves are correspondingly formed between the left sides of the movable butterfly plate 14, the plurality of grooves are uniformly distributed along the circumferential direction of the movable butterfly plate 14, compression springs 17 are arranged in the grooves, and the left ends and the right ends of the compression springs 17 are respectively propped against the right sides of the butterfly plate frame 13 and the left sides of the movable butterfly plate 14; the butterfly plate and the movable butterfly plate 14 are connected through a plurality of connecting screws 18, the plurality of connecting screws 18 are uniformly arranged along the circumferential direction of the movable butterfly plate 14, the connecting screws 18 are in threaded connection with the movable butterfly plate 14, and the rod part of the connecting screws 18 is in loose connection with the movable butterfly plate 14; under the action of the compression spring 17, the head of the connecting screw 18 is in press fit with the butterfly plate frame 13, and a buffer gap 19 is formed between the butterfly plate frame 13 and the movable butterfly plate 14; the outer circumferential surface of the movable butterfly plate 14 is of a conical structure with left thick and right thin, and the outer circumferential surface of the movable butterfly plate 14 is in pressure welding sealing fit with the sealing ring 12.
The loose connection of the connection screw 18 with the pallet 13 is as follows: the butterfly plate frame 13 is provided with a plurality of countersunk holes, the inner diameter of the left side part of the countersunk holes is larger than that of the right side part, each connecting screw 18 extends into and penetrates through the countersunk holes from left to right, the rod part of each connecting screw 18 is in clearance fit with the thinner right side part of the countersunk holes, and the head part of each connecting screw 18 is arranged in the thicker left side part of the countersunk holes.
The middle part of the butterfly plate frame 13 is provided with a left-right transparent liquid-permeable hole 20, the left side surface of the movable butterfly plate 14 is provided with a step groove 21, the right side of the butterfly plate frame 13 is provided with an annular step 22, and the annular step 22 stretches into the step groove 21 and is in left-right sliding fit with the step groove 21.
The driving device comprises a support 23, a turbine box 24 and a hand wheel 25, wherein the support 23 is arranged at the upper end part of the extension tube 6, a worm gear and worm transmission mechanism (not shown) is arranged in the turbine box 24, the upper end of the valve rod 2 penetrates through the support 23 and stretches into the turbine box 24 to be coaxially connected with a worm wheel of the worm gear and worm mechanism, a worm of the worm gear and worm mechanism stretches out of the turbine box 24, and the hand wheel 25 is coaxially arranged on the worm.
The bottom of the bracket 23 is provided with a rubber protective cover 26 with an open lower end, the rubber protective cover 26 is in a conical structure with a thin upper part and a thick lower part, and the rubber protective cover 26 is sleeved outside the top end of the extension tube 6.
The invention designs the integral butterfly plate into two parts, namely a butterfly plate frame 13 and a movable butterfly plate 14. The butterfly plate frame 13 is connected with the valve rod 2 through a cylindrical pin 16, the movable butterfly plate 14 is connected with the butterfly plate frame 13 through an inner hexagonal connecting screw 18, and a buffer gap 19 is reserved between the movable butterfly plate 14 and the butterfly plate frame 13, so that the movable butterfly plate 14 can move in a small gap range. A plurality of compression springs 17 are added at intervals in the distribution circle of the connecting screws 18 for pre-tightening and stabilizing the movable butterfly plate 14.
The working state analysis of the invention: when the butterfly plate sealing assembly works, the medium force analyzes the sealing effect, the hand wheel 25 is rotated, the valve rod 2 is driven to rotate by the worm and gear transmission mechanism in the turbine box 24, when the valve rod 2 drives the butterfly plate frame 13 to perform closing motion, the movable butterfly plate 14 follows the butterfly plate frame 13 to rotate and gradually approaches the sealing ring 12, at the moment, the flow cross section is reduced, the medium flow is blocked, the left side pressure is increased, the medium flows to the left side of the movable butterfly plate 14 through the liquid-permeable hole 20 on the butterfly plate frame 13 and pushes the movable butterfly plate 14 to slightly move rightwards, at the moment, the pressure of the medium on the movable butterfly plate 14 reaches the highest value at the position where the movable butterfly plate 14 is vertical to the central line of the valve body 1, the acting force pushing the movable butterfly plate 14 rightwards is also maximum, and because the movable butterfly plate 14 has a certain moving amount, the pressure of the medium pushes the movable butterfly plate 14 to press the sealing ring 12, the sealing effect is better the greater the pressure, and the effect of self-sealing is achieved by the pressure effect of the medium.
A step groove 21 is formed in the middle of the left side of the movable butterfly plate 14, and a medium can enter the step groove 21 through a liquid-permeable hole 20 on the butterfly plate frame 13 to push the movable butterfly plate 14 to move rightwards; the sliding fit of the annular step 22 and the step groove 21 restricts the movement of the movable butterfly plate 14 only in the axial direction and not in the radial direction, thus ensuring good sealing performance between the movable butterfly plate 14 and the seal ring 12.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.
Claims (3)
1. The utility model provides a self sealss removes butterfly plate low temperature butterfly valve, which comprises a valve body, the valve rod, butterfly plate seal assembly and drive arrangement, valve body top and bottom are fixed respectively and are provided with valve neck and lower valve neck, go up the central line coincidence of valve neck and lower valve neck and this central line passes the center of valve body, go up the coaxial to be connected with the extension pipe in valve neck top, valve rod top-down passes the extension pipe in proper order, go up valve neck and lower valve neck, lower valve neck bottom is provided with bottom and sealing gasket, it is provided with the guide pin bushing of cover outside the valve rod to go up the valve neck inside, be provided with sealing filler and packing gland assembly between extension pipe upper end inside and the valve rod outer wall, drive arrangement sets up at the top of extension pipe, drive arrangement's power take off end is connected with the upper end transmission of valve rod, its characterized in that: the butterfly plate sealing assembly comprises an annular pressing plate, a sealing ring, a butterfly plate frame and a movable butterfly plate, an annular mounting groove is formed in the inner wall of the right port of the valve body, the sealing ring is fixed in the annular mounting groove by the annular pressing plate, and the annular pressing plate is connected to the right end part of the valve body through a compression bolt;
the butterfly plate frame and the movable butterfly plate are both positioned in the valve body, the butterfly plate frame is fixedly connected to the valve rod through cylindrical pins arranged along the radial direction of the valve rod, a plurality of grooves are correspondingly formed between the left sides of the movable butterfly plate, the plurality of grooves are uniformly distributed along the circumferential direction of the movable butterfly plate, compression springs are arranged in the grooves, and the left ends and the right ends of the compression springs are respectively propped against the right sides of the butterfly plate frame and the left sides of the movable butterfly plate; the butterfly plate is connected with the movable butterfly plate through a plurality of connecting screws, the plurality of connecting screws are uniformly distributed along the circumferential direction of the movable butterfly plate, the connecting screws are in threaded connection with the movable butterfly plate, and the rod part of the connecting screws is in loose connection with the movable butterfly plate; under the action of a compression spring, the head of the connecting screw is in compression fit with the butterfly plate frame, and a buffer gap is formed between the butterfly plate frame and the movable butterfly plate; the outer circumferential surface of the movable butterfly plate is of a conical structure with left thick and right thin, and is in crimping sealing fit with the sealing ring;
the mode that connecting screw and the slackening of butterfly plate frame are connected is: the butterfly plate frame is provided with a plurality of countersunk holes, the inner diameter of the left side part of each countersunk hole is larger than that of the right side part, each connecting screw extends into and passes through each countersunk hole from left to right, the rod part of each connecting screw is in clearance fit with the thinner right side part of each countersunk hole, and the head part of each connecting screw is arranged in the thicker left side part of each countersunk hole;
the transparent liquid permeation hole of controlling has been seted up at butterfly plate frame middle part, removes the butterfly plate left surface and is provided with the step groove, and butterfly plate frame right side is provided with annular step, and annular step stretches into the step inslot and with step groove side-to-side sliding fit.
2. The self-sealing mobile butterfly plate low-temperature butterfly valve of claim 1, wherein: the driving device comprises a support, a turbine box and a hand wheel, the support is arranged at the upper end of the extension pipe, a worm gear and worm transmission mechanism is arranged in the turbine box, the upper end of the valve rod penetrates through the support and stretches into the turbine box to be coaxially connected with a worm wheel of the worm gear and worm mechanism, the worm of the worm gear and worm mechanism stretches out of the turbine box, and the hand wheel is coaxially arranged on the worm.
3. The self-sealing mobile butterfly plate low-temperature butterfly valve of claim 2, wherein: the bottom of the bracket is provided with a rubber protective cover with an open lower end, the rubber protective cover is of a conical structure with a thin upper part and a thick lower part, and the rubber protective cover is sleeved outside the top end of the extension pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522534.9A CN108547956B (en) | 2018-05-28 | 2018-05-28 | Self-sealing movable butterfly plate low-temperature butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522534.9A CN108547956B (en) | 2018-05-28 | 2018-05-28 | Self-sealing movable butterfly plate low-temperature butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108547956A CN108547956A (en) | 2018-09-18 |
| CN108547956B true CN108547956B (en) | 2023-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810522534.9A Active CN108547956B (en) | 2018-05-28 | 2018-05-28 | Self-sealing movable butterfly plate low-temperature butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108547956B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4026514A (en) * | 1976-03-08 | 1977-05-31 | Sumner Joe D | Pressure enhanced butterfly valve |
| CN1605773A (en) * | 2004-11-16 | 2005-04-13 | 陈国顺 | Hard sealing two-way disc valve |
| ES1074118U (en) * | 2011-03-02 | 2011-03-23 | Angodos, S.L. | Butterfly valve |
| CN201925495U (en) * | 2011-03-04 | 2011-08-10 | 周振峰 | Double-eccentricity two-way metal hard seal butterfly valve |
| CN203374830U (en) * | 2013-07-15 | 2014-01-01 | 天津百利展发集团有限公司 | Automatic compensation butterfly valve |
| CN105465383A (en) * | 2016-01-08 | 2016-04-06 | 无锡科磊阀业有限公司 | Eccentric butterfly valve structure with self-compensating function |
| KR20180027089A (en) * | 2016-09-06 | 2018-03-14 | 성도밸브 (주) | Sealing apparatus for butterfly valve |
| CN208268435U (en) * | 2018-05-28 | 2018-12-21 | 开封瑞科阀门有限公司 | A kind of mobile butterfly plate low temperature butterfly valve of self-sealing |
-
2018
- 2018-05-28 CN CN201810522534.9A patent/CN108547956B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4026514A (en) * | 1976-03-08 | 1977-05-31 | Sumner Joe D | Pressure enhanced butterfly valve |
| CN1605773A (en) * | 2004-11-16 | 2005-04-13 | 陈国顺 | Hard sealing two-way disc valve |
| ES1074118U (en) * | 2011-03-02 | 2011-03-23 | Angodos, S.L. | Butterfly valve |
| CN201925495U (en) * | 2011-03-04 | 2011-08-10 | 周振峰 | Double-eccentricity two-way metal hard seal butterfly valve |
| CN203374830U (en) * | 2013-07-15 | 2014-01-01 | 天津百利展发集团有限公司 | Automatic compensation butterfly valve |
| CN105465383A (en) * | 2016-01-08 | 2016-04-06 | 无锡科磊阀业有限公司 | Eccentric butterfly valve structure with self-compensating function |
| KR20180027089A (en) * | 2016-09-06 | 2018-03-14 | 성도밸브 (주) | Sealing apparatus for butterfly valve |
| CN208268435U (en) * | 2018-05-28 | 2018-12-21 | 开封瑞科阀门有限公司 | A kind of mobile butterfly plate low temperature butterfly valve of self-sealing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108547956A (en) | 2018-09-18 |
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