CN212536693U - Double-seal three-eccentric hard seal butterfly valve of water system - Google Patents
Double-seal three-eccentric hard seal butterfly valve of water system Download PDFInfo
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- CN212536693U CN212536693U CN202020974289.8U CN202020974289U CN212536693U CN 212536693 U CN212536693 U CN 212536693U CN 202020974289 U CN202020974289 U CN 202020974289U CN 212536693 U CN212536693 U CN 212536693U
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Abstract
The utility model discloses a double-sealing three-eccentric hard sealing butterfly valve of a water system, which comprises a valve body, wherein both ends of the valve body are of an open structure, a valve cavity is arranged in the axial direction of the valve body, a butterfly plate is arranged in the valve body, and the butterfly plate is arranged in the valve cavity; the surface of the butterfly plate is provided with a sealing ring; a valve rod is arranged in the valve body, the lower end of the valve rod is connected with the butterfly plate, the upper end of the valve rod penetrates out of the top of the valve body, and a rotary hand wheel is arranged at the end part of the upper end of the valve rod; a cylindrical pin is arranged between the valve rod and the butterfly plate. The utility model discloses long service life can not cause the damage of sealing washer because of the fluidic washing away of high speed to greatly improve the life of this butterfly valve.
Description
Technical Field
The utility model relates to a butterfly valve, in particular to water system double containment three off-center butterfly valves sealed firmly.
Background
The sealing ring of the double-sealing three-eccentric two-way pressing hard-to-hard 0 leakage butterfly valve metal hard seal of the water system is formed by compounding 2 layers or more than 2 layers of metal sheets and non-metal sheets, and the sealing ring is fixedly arranged on a butterfly plate through a butterfly plate pressing ring and a bolt. The metal hard seal butterfly valve with the structure is only suitable for general non-high temperature, high pressure and non-corrosive working conditions due to the influence of physical and chemical properties of the non-metal sheet on the seal ring. When the pressure in the pipeline is high, the medium flow rate is high, and the butterfly plate is in a partially opened or fully opened state, the high-speed fluid can flush the front surface of the sealing ring on the butterfly plate, so that the nonmetal interlayer on the sealing ring is abraded and even falls off, and the sealing performance of the valve is greatly influenced; when the medium in the pipeline is corrosive, the non-metal interlayer on the sealing ring is easily corroded by the medium, and the leakage of the sealing surface of the valve is caused.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve the technical problem that prior art exists to a long service life can not cause the damage of sealing washer because of the fluidic washing away of high speed, thereby greatly improved the water system double containment three off-center hard seal butterfly valve of the life of this butterfly valve.
The above technical problem of the present invention can be solved by the following technical solutions:
a double-sealing three-eccentric hard sealing butterfly valve for a water system comprises a valve body, wherein two ends of the valve body are both of an opening structure, a valve cavity is axially arranged on the valve body, a butterfly plate is arranged inside the valve body, and the butterfly plate is arranged in the valve cavity; the surface of the butterfly plate is provided with a sealing ring; a valve rod is arranged in the valve body, the lower end of the valve rod is connected with the butterfly plate, the upper end of the valve rod penetrates out of the top of the valve body, and a rotary hand wheel is arranged at the end part of the upper end of the valve rod; a cylindrical pin is arranged between the valve rod and the butterfly plate.
Further, the sealing surface of the butterfly plate is in a shape of an oblique circular truncated cone. A bottom cover is arranged at the bottom of the valve body, the end part of the lower end of the valve rod is arranged in the bottom cover, a sealing gasket is arranged between the bottom cover and the valve body, and a first inner hexagon screw is arranged among the bottom cover, the sealing gasket and the bottom of the valve body; the lower shaft sleeve is arranged on the outer peripheral surface of the lower end of the valve rod and is arranged at the inner bottom of the valve body; the outer peripheral surface of the upper end of the valve rod is provided with an upper shaft sleeve, and the upper shaft sleeve is arranged at the inner top of the valve body. The sealing ring is fixed on the butterfly plate through the pressing ring, and a second inner hexagon screw is arranged among the sealing ring, the pressing ring and the butterfly plate;
furthermore, a packing is arranged between the top of the valve body and the valve rod, an isolating ring is arranged in the middle of the packing, a packing pressing plate is arranged at the top of the valve body and used for pressing the packing, and a packing pressing sleeve is arranged between the packing and the packing pressing plate; the packing pressing plate is fixedly installed with the top of the valve body through a first fixing piece; the first fixing piece comprises a first stud, the first stud is installed between the packing pressing plate and the valve body, a first hexagon nut is sleeved on the first stud, and a first spring washer is arranged between the first hexagon nut and the packing pressing plate.
Furthermore, a support is arranged at the top of the valve body, a worm and gear mechanism is arranged at the top of the support, and the upper end of the valve rod penetrates out of the top of the support; the worm and gear mechanism comprises a worm and a worm wheel, one end of the worm is connected with the shaft center of the rotary hand wheel, the other end of the worm is meshed with the worm wheel, and the worm wheel is arranged at the upper end part of the valve rod; the bracket and the valve body are fixedly installed through a third fixing piece; the third fixing piece comprises a second stud, the second stud is installed between the support and the valve body, a second hexagon nut is sleeved on the second stud, and a second spring washer is arranged between the second hexagon nut and the support; the worm gear mechanism is arranged in a protective box, the protective box is arranged at the top of the bracket, and the protective box and the top of the bracket are fixedly arranged through a second fixing piece; the second fixing part comprises a third stud, the third stud is installed between the protective box and the support, a third hexagon nut is sleeved on the third stud, and a third spring washer is arranged between the third hexagon nut and the support.
By adopting the technical scheme, when the butterfly valve is closed, the butterfly plate and the valve body do not generate friction in the closing process, so that the service life of the butterfly valve is ensured; in addition, the sealing ring of the butterfly valve has certain elasticity, and a small amount of clearance is reserved between the lug boss in the elastic ring and the elastic ring, so that the elastic ring can slightly displace; when the valve is closed, the elastic sealing ring can automatically move to the position where the stress is most uniform under the action of the closing force. The butterfly valve is in a fully opened or partially opened state, and the sealing ring cannot be damaged due to the flushing of high-speed fluid, so that the service life of the butterfly valve is greatly prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the structure schematic diagram of the double-sealing three-eccentric hard sealing butterfly valve of the water system of the utility model.
Fig. 2 is the internal structure schematic diagram of the double-sealing three-eccentric hard sealing butterfly valve of the water system of the utility model.
Fig. 3 is a schematic structural diagram of the bottom cover of the present invention.
Fig. 4 is a schematic structural view of the butterfly plate of the present invention.
Fig. 5 is a side view of the butterfly plate of the present invention.
Fig. 6 is a schematic structural view of the valve rod of the present invention.
Fig. 7 is a schematic structural view of the packing pressing sleeve of the present invention.
Fig. 8 is a schematic structural view of the packing press plate of the present invention.
Fig. 9 is a schematic structural view of the bracket of the present invention.
Fig. 10 is a cross-sectional view taken along line a-a of fig. 9.
Fig. 11 is a cross-sectional view taken along line B-B of fig. 9.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.
As shown in fig. 1 to 11, a double-sealing three-eccentric hard sealing butterfly valve for a water system comprises a valve body 5, wherein both ends of the valve body 5 are of an open structure, a valve cavity 30 is axially arranged on the valve body 5, a butterfly plate 6 is arranged inside the valve body 5, and the butterfly plate 6 is arranged in the valve cavity 30; the surface of the butterfly plate 6 is provided with a sealing ring 7; a valve rod 11 is arranged in the valve body 5, the lower end of the valve rod 11 is connected with the butterfly plate 6, the upper end of the valve rod 11 penetrates out of the top of the valve body 5, and a rotary hand wheel 28 is arranged at the end part of the upper end of the valve rod 11; a cylindrical pin 10 is arranged between the valve rod 11 and the butterfly plate 6.
The utility model discloses two sealed three off-centre hard seal butterfly valves of water system, the operator rotates rotatory hand wheel 28, and rotatory hand wheel 28 drives valve rod 11 and realizes rotating, and the rotation of valve rod 11 drives butterfly plate 6 and realizes rotating, and butterfly plate 6 realizes rotating in valve pocket 30, conveniently opens or closes valve pocket 30 through butterfly plate 6; specifically, an operator rotates the rotating hand wheel 28 clockwise, the rotating hand wheel 28 drives the butterfly plate 6 to rotate clockwise through the valve rod 11, so that the axial direction of the butterfly plate 6 is perpendicular to the axial direction of the valve body 5, and the valve cavity 30 is closed at this time; an operator rotates the rotating hand wheel 28 anticlockwise, the rotating hand wheel 28 drives the butterfly plate 6 to rotate anticlockwise through the valve rod 11, the axial direction of the butterfly plate 6 is made to be horizontal to the axial direction of the valve body 5, and at the moment, the valve cavity 30 is opened; the flexibility of controlling the butterfly valve switch is greatly improved.
Preferably, the bottom of the valve body 5 is provided with a bottom cover 1, the lower end part of the valve rod 11 is installed in the bottom cover 1, a sealing gasket 3 is arranged between the bottom cover 1 and the valve body 5, and a first inner hexagon screw 2 is arranged between the bottom cover 1, the sealing gasket 3 and the bottom of the valve body 5; the lower end of the valve rod 11 is positioned and installed through the bottom cover 1, and the bottom cover 1 and the valve body 5 are installed through the sealing gasket 3 to have better sealing performance; the bottom cover 1, the gasket 3 and the bottom of the valve body 5 are firmly installed through the first socket head cap screws 2.
Preferably, the lower end peripheral surface of the valve rod 11 is provided with a lower shaft sleeve 4, and the lower shaft sleeve 4 is arranged at the inner bottom of the valve body 5; the outer peripheral surface of the upper end of the valve rod 11 is provided with an upper shaft sleeve 12, and the upper shaft sleeve 12 is arranged at the inner top of the valve body 5; the lower end of the valve rod 11 and the valve body 5 are firmly installed through the lower shaft sleeve 4, and the upper end of the valve rod 11 and the valve body 5 are firmly installed through the upper shaft sleeve 12.
Preferably, the sealing ring 7 is fixed on the butterfly plate 6 through a pressing ring 8, and a second socket head cap screw 9 is arranged among the sealing ring 7, the pressing ring 8 and the butterfly plate 6; the seal ring 7 is firmly attached to the butterfly plate 6 by the pressing ring 8, and the seal ring 7, the pressing ring 8, and the butterfly plate 6 are firmly attached by the second socket head cap screw 9.
Preferably, a packing 13 is arranged between the top of the valve body 5 and the valve rod 11, an isolating ring 14 is arranged in the middle of the packing 13, a packing pressing plate 16 is arranged at the top of the valve body 5, the packing pressing plate 16 presses the packing 13, and a packing pressing sleeve 15 is arranged between the packing 13 and the packing pressing plate 16; the packing pressing sleeve 15 enables the packing 13 to be firmly installed in the valve body 5 through the packing pressing plate 16, and the middle position of the packing 13 is separated through the isolating ring 14, so that the packing 13 is separated into a plurality of sections; the sealing between the valve body 5 and the valve rod 11 is further ensured by the packing 13.
Preferably, the packing pressure plate 16 is fixedly installed with the top of the valve body 5 through a first fixing member; the first fixing piece comprises a first stud 19, the first stud 19 is installed between the packing pressing plate 16 and the valve body 5, a first hexagon nut 17 is sleeved on the first stud 19, and a first spring washer 18 is arranged between the first hexagon nut 17 and the packing pressing plate 16; the packing press plate 16 is firmly mounted to the top of the valve body 5 by the first fixing member.
Preferably, the top of the valve body 5 is provided with a bracket 20, the top of the bracket 20 is provided with a worm gear mechanism 27, and the upper end of the valve rod 11 penetrates out of the top of the bracket 20; the worm and gear mechanism 27 comprises a worm 29 and a worm wheel, one end of the worm 29 is connected with the shaft center of the rotating hand wheel 28, the other end of the worm 29 is meshed with the worm wheel, and the worm wheel is arranged at the upper end part of the valve rod 11; an operator rotates the rotary hand wheel 28, the rotary hand wheel 28 drives the worm 29 to rotate, the worm 29 rotates to drive the worm wheel to rotate, the worm wheel rotates to drive the valve rod 11 to rotate, the valve rod 11 rotates to drive the butterfly plate 6 to rotate, the butterfly plate 6 rotates in the valve cavity 30, and the valve cavity 30 is conveniently opened or closed through the butterfly plate 6.
Preferably, the bracket 20 is fixedly installed with the valve body 5 through a third fixing member; the third fixing piece comprises a second stud 23, the second stud 23 is installed between the support 20 and the valve body 5, a second hexagon nut 21 is sleeved on the second stud 23, and a second spring washer 22 is arranged between the second hexagon nut 21 and the support 20; the bracket 20 and the valve body 5 are firmly mounted by the third fixing member.
Preferably, the worm gear mechanism 27 is installed in a protective box, the protective box is installed on the top of the bracket 20, and the protective box and the top of the bracket 20 are fixedly installed through a second fixing piece; the second fixing piece comprises a third stud 26, the third stud 26 is installed between the protective box and the support 20, a third hexagon nut 24 is sleeved on the third stud 26, and a third spring washer 25 is arranged between the third hexagon nut 24 and the support 20; the worm gear mechanism 27 is protected by the protective box, and the protective box is firmly installed with the top of the bracket 20 through the second fixing piece.
The utility model discloses two eccentric hard seal butterfly valves of three sealed of water system, three eccentric metal seal butterfly valves, except that valve rod 11 and butterfly plate 6 have two eccentricities, the sealed surface of butterfly plate 6 is the oblique circular platform shape, this is the third eccentricity of so-called triple offset; when the butterfly valve is closed, the butterfly plate 6 is pushed forward due to eccentricity, and the butterfly plate 6 and the valve body 5 do not generate friction in the closing process, so that the service life of the butterfly valve is ensured; in addition, the sealing ring of the butterfly valve has certain elasticity, and a small amount of clearance is reserved between the lug boss in the elastic ring and the elastic ring, so that the elastic ring can slightly displace; when the valve is closed, under the action of closing force, the elastic body sealing ring can automatically move to the position with the most uniform stress; and the small amount of deformation of the elastic ring makes the sealing ring at the valve seat stressed evenly to reach the optimal sealing state.
The utility model discloses two sealed three off-centre hard seal butterfly valves of water system, sealing washer 7 are made by metal material completely, do not have the intermediate layer that non-metallic material such as PTFE, graphite, rubber asbestos board made, and this butterfly valve is under the state of opening entirely or partly opening, can not cause the damage of sealing washer 7 because of the washing away of high-speed fluid to greatly improve the life of this butterfly valve; the butterfly valve is manually operated or a worm and gear mechanism is used for making a rotary motion within the range of 0-90 degrees, so that a valve rod 11 is driven, and a butterfly plate 6 is made to make motions in the directions of opening and closing the valve within the range of 0-90 degrees; when the butterfly plate 6 is in the fully closed position, the butterfly valve realizes stop sealing; when the butterfly plate 6 is in an open state, the flow can be adjusted within the range of 20-70 degrees.
The utility model discloses water system double containment three off-centre hard seal butterfly valve, this butterfly valve adopt three-dimensional off-centre principle design, make the space movement track of sealed face reach the idealization, the sealed face does not have friction each other, noninterference, in addition the sealing material is selected properly, thus make the leakproofness, corrosion resistance, high temperature resistance and wearability of butterfly valve obtain reliable assurance; the main characteristics are as follows: the starting torque is small, the operation is flexible and convenient, and the labor and the energy are saved; the butterfly plate is more and more tightly closed due to the three-dimensional braiding center structure, the sealing performance is reliable, and no leakage is achieved; high pressure resistance, corrosion resistance, wear resistance and long service life; the sealing part is made of metal materials, and can adapt to harsh working conditions such as high temperature (less than or equal to 800 ℃), low temperature (more than or equal to 196), high pressure (less than or equal to PN260/Class 1500), corrosiveness and the like.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (8)
1. A double-sealing three-eccentric hard sealing butterfly valve for a water system comprises a valve body, wherein two ends of the valve body are both of an opening structure, a valve cavity is axially arranged on the valve body, a butterfly plate is arranged inside the valve body, and the butterfly plate is arranged in the valve cavity; the surface of the butterfly plate is provided with a sealing ring; a valve rod is arranged in the valve body, the lower end of the valve rod is connected with the butterfly plate, the upper end of the valve rod penetrates out of the top of the valve body, and a rotary hand wheel is arranged at the end part of the upper end of the valve rod; a cylindrical pin is arranged between the valve rod and the butterfly plate;
the method is characterized in that: a packing is arranged between the top of the valve body and the valve rod, an isolating ring is arranged in the middle of the packing, a packing pressing plate is arranged at the top of the valve body and used for pressing the packing, and a packing pressing sleeve is arranged between the packing and the packing pressing plate; the packing pressing plate is fixedly installed with the top of the valve body through a first fixing piece; the first fixing piece comprises a first stud, the first stud is installed between the packing pressing plate and the valve body, a first hexagon nut is sleeved on the first stud, and a first spring washer is arranged between the first hexagon nut and the packing pressing plate.
2. A water system dual seal triple offset hard seal butterfly valve as claimed in claim 1, wherein: the sealing surface of the butterfly plate is in the shape of an inclined circular truncated cone.
3. A water system dual seal triple offset hard seal butterfly valve as claimed in claim 1, wherein: the bottom of the valve body is provided with a bottom cover, the end part of the lower end of the valve rod is installed in the bottom cover, a sealing gasket is arranged between the bottom cover and the valve body, and a first inner hexagon screw is arranged among the bottom cover, the sealing gasket and the bottom of the valve body.
4. A water system dual seal triple offset hard seal butterfly valve as claimed in claim 1, wherein: the lower shaft sleeve is arranged on the outer peripheral surface of the lower end of the valve rod and is arranged at the inner bottom of the valve body; the outer peripheral surface of the upper end of the valve rod is provided with an upper shaft sleeve, and the upper shaft sleeve is arranged at the inner top of the valve body.
5. A water system dual seal triple offset hard seal butterfly valve as claimed in claim 1, wherein: the sealing ring is fixed on the butterfly plate through the pressing ring, and a second inner hexagon screw is arranged among the sealing ring, the pressing ring and the butterfly plate.
6. A water system dual seal triple offset hard seal butterfly valve as claimed in claim 1, wherein: the top of the valve body is provided with a bracket, the top of the bracket is provided with a worm gear mechanism, and the upper end of the valve rod penetrates out of the top of the bracket; the worm and gear mechanism comprises a worm and a worm wheel, one end of the worm is connected with the shaft center of the rotary hand wheel, the other end of the worm is meshed with the worm wheel, and the worm wheel is arranged at the end part of the upper end of the valve rod.
7. A water system dual seal triple offset hard seal butterfly valve as claimed in claim 6, wherein: the bracket and the valve body are fixedly installed through a third fixing piece; the third fixing piece comprises a second stud, the second stud is installed between the support and the valve body, a second hexagon nut is sleeved on the second stud, and a second spring washer is arranged between the second hexagon nut and the support.
8. A water system dual seal triple offset hard seal butterfly valve as claimed in claim 6, wherein: the worm gear mechanism is arranged in a protective box, the protective box is arranged at the top of the bracket, and the protective box and the top of the bracket are fixedly arranged through a second fixing piece; the second fixing part comprises a third stud, the third stud is installed between the protective box and the support, a third hexagon nut is sleeved on the third stud, and a third spring washer is arranged between the third hexagon nut and the support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020974289.8U CN212536693U (en) | 2020-06-01 | 2020-06-01 | Double-seal three-eccentric hard seal butterfly valve of water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020974289.8U CN212536693U (en) | 2020-06-01 | 2020-06-01 | Double-seal three-eccentric hard seal butterfly valve of water system |
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|---|---|
| CN212536693U true CN212536693U (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020974289.8U Active CN212536693U (en) | 2020-06-01 | 2020-06-01 | Double-seal three-eccentric hard seal butterfly valve of water system |
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| CN (1) | CN212536693U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790277A (en) * | 2021-08-31 | 2021-12-14 | 徐国奇 | Three-eccentric bidirectional butterfly valve sealing structure |
-
2020
- 2020-06-01 CN CN202020974289.8U patent/CN212536693U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790277A (en) * | 2021-08-31 | 2021-12-14 | 徐国奇 | Three-eccentric bidirectional butterfly valve sealing structure |
| CN113790277B (en) * | 2021-08-31 | 2023-09-22 | 上海阀特流体控制阀门有限公司 | Three-eccentric bidirectional butterfly valve sealing structure |
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