CN101382199B - Zero-friction hard-sealing butterfly valve - Google Patents
Zero-friction hard-sealing butterfly valve Download PDFInfo
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- CN101382199B CN101382199B CN2008101524329A CN200810152432A CN101382199B CN 101382199 B CN101382199 B CN 101382199B CN 2008101524329 A CN2008101524329 A CN 2008101524329A CN 200810152432 A CN200810152432 A CN 200810152432A CN 101382199 B CN101382199 B CN 101382199B
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Abstract
The invention relates to a zero-friction hard sealing butterfly valve, mainly comprising a valve body, a valve rod, a valve plate, a valve seat and a driving device which are hermetically assembled; the zero-friction hard sealing butterfly valve is characterized in that: the valve body comprises a main valve body and an auxiliary valve boy; the central axis lines of the main valve body and the auxiliary valve body are coincident to each other; the main valve body and the auxiliary valve body are hermetically connected by a flange bolt; the internal circumference of the main valve body is provided with a keyway; the valve seat is a ring-shaped structure and arranged in the valve body, the external circumferential surface at one end of the valve seat is provided with a sliding key and can axially slide along the keyway of the main valve body; the internal circumferential surface of the sliding key of the valve seat is provided with a valve seat sealing ring which is matched with the valve plate sealing ring at the external circumference of the valve plate so as to form a sealing pair; the external circumferential surface at the other end of the valve seat is provided with an external thread which is mechanically connected with the driving device; one end of the internal circumferential surface of the auxiliary valve body is provided with a driving device supporter; the upper end and the lower end of the valve rod are respectively connected with the valve plate by an upper connecting seat and a lower connecting seat through using a taper bolt ; the rotation axis line of the valve plate and the sealing pair plane have axial eccentricity which is single eccentric structure.
Description
Technical field
The present invention relates to a kind of valve, particularly a kind of hard seal butterfly valve that does not have friction (i.e. zero friction), international Patent classificating number intends being Int.Cl.F16K1/22 (2006.01) I.
Background technique
Hard seal butterfly valve has generally included valve body, valve rod, valve plate and valve seat, valve plate can rotate in valve body, valve seat is set in the inner circumference of valve body, the inner ring surface of valve seat is formed sealing pair with the seal ring on the excircle that is set in valve plate, under the valve closing state, rely on the radial compression of valve plate and the end thrust of forward medium that seal ring is close on the valve seat, resiliently deformable taking place, produce seal pressure, realizes the sealing between valve plate and valve body.In the prior art because structural reason, seal pressure between sealing pair immobilizes, during the valve plate opening and closing, always exist friction between sealing pair, make the moment of opening/shutting valve increase, keying speed slows down, and frequent keying causes sealing surface wear easily, sealability descends, and finally causes valve leak.For this reason, claimant's patent application formerly " a kind of non-abrasion hard-sealing butterfly valve " (200710150352.5) has solved this problem preferably: its valve seat is for making axially movable moving valve base along valve interior wall, valve seat exterior edge face and be installed between the lateral body of valve body one side and be equipped with spring, interior edge face links to each other with valve rod by push rod; During valve opening, valve rod elder generation moving linearly drives valve seat by push rod and breaks away from butterfly plate earlier, and valve rod rotates then, drives butterfly plate and rotarily opens valve; Be single eccentric structure between butterfly plate rotation axis and the sealing pair plane.This unique design has avoided butterfly plate to produce frictional force between the sealing pair when rotating, and opens and closes moment and reduces greatly, has improved the sealability and the working life of valve.But still there is deficiency in this butterfly valve: 1. the push rod of described connection valve seat and valve rod has two, can cause the sealing surface seal pressure partly that makes near the push rod place bigger when valve closing, makes the seal pressure of whole sealing surface inhomogeneous; 2. the joint with push rod on the described valve rod is provided with the space curve groove, and manufacturing process is complicated, and cost is higher.
Summary of the invention
At the deficiencies in the prior art, the technical problem that quasi-solution of the present invention is determined is: a kind of Zero-friction hard-sealing butterfly valve is provided.The valve seat of this butterfly valve can move axially along valve body, do not have friction (i.e. zero friction) between the sealing pair, and seal pressure is even, and operational torque is low, long service life, and driving mode is various, and is simultaneously simple in structure, easy to manufacture, with low cost.
The technological scheme that the present invention solve the technical problem is: design a kind of Zero-friction hard-sealing butterfly valve, this butterfly valve mainly comprises valve body, valve rod, valve plate, valve seat and the valve seat drive unit of sealing assembling, it is characterized in that described valve body comprises main valve body and auxiliary valve body two-part, main valve body and auxiliary valve body central axes are tightly connected by flange bolt; The inner circumference of described main valve body is provided with keyway; Described valve seat is a circular ring, be arranged in the described valve body, on the outer peripheral surface of one end feather key is installed, and can be along the keyway axial slip of described main valve body, the inner peripheral surface of valve seat is equipped with valve seat insert, the formation sealing pair that matches with the valve plate seal ring that is installed in the valve plate outer circumferential edges, the outer peripheral surface of the valve seat the other end is shaped on the outside thread with described drive unit mechanical connection; One end of the inner peripheral surface of described auxiliary valve body is provided with the drive unit bearing; The upper and lower end of described valve rod is connected with valve plate with lower connecting base by upper connecting base with taper pin respectively; There is axially off-centre between the rotation axis of described valve plate and the sealing pair plane, is single eccentric structure.
Compared with prior art, the beneficial effect of butterfly valve of the present invention is:
1. usefulness improves.Butterfly valve of the present invention is designed to traditional fixed valve seat improvement can be along the axially movable moving valve base of valve body center line, during valve opening, valve seat moves axially in the central axial direction of its drive unit effect lower edge valve body, unclamp compressing to valve plate, valve seat insert and valve plate seal ring break away from, after sealing surface is separated from a segment distance, start valve rod and rotate, open valve plate under the frictionless situation.This unique design has avoided valve plate to produce frictional force between the sealing pair when rotating, and bring up to hundreds of thousands by present several thousand times the working life that can make valve.And when opening valve plate, the pressure medium on valve plate both sides has been laid down major part, reduces greatly so open and close moment, only be about 10% of general butterfly valve, can make the corresponding minimizing of drive unit, thereby reduce cost with actuator's model, save the energy, improved keying speed simultaneously.
2. be easy to make.Butterfly valve structure compactness of the present invention, the volume and the weight of valve are low weight, and the operation simple light is manufactured than being easier to.
3. good airproof performance.During butterfly valve valve closing of the present invention, after valve plate forwarded original position to, valve seat along the parallel seal ring of pressing to valve plate of the central axial direction of valve body, compressed valve plate until valve seat under its drive unit effect, can guarantee between sealing surface seal pressure uniformly; And valve seat drive unit of the present invention has the reversing drive self-locking performance, can guarantee compressing and excellent sealing performance of sealing surface.
4. applicability is wide.The driving mode of butterfly valve of the present invention is various, can adopt electronic, manual, surge or pneumatic mode drives, very easy to use.
Description of drawings
Fig. 1 is a kind of embodiment's of a Zero-friction hard-sealing butterfly valve of the present invention overall structure front-view schematic diagram;
Fig. 2 is the A-A cross-sectional view among a kind of embodiment Fig. 1 of Zero-friction hard-sealing butterfly valve of the present invention;
Fig. 3 is the local structure for amplifying schematic representation in the I place among a kind of embodiment Fig. 1 of Zero-friction hard-sealing butterfly valve of the present invention;
Fig. 4 is the B-B cross-sectional view among a kind of embodiment Fig. 1 of Zero-friction hard-sealing butterfly valve of the present invention;
Fig. 5 is the another kind of embodiment's of a Zero-friction hard-sealing butterfly valve of the present invention overall structure front-view schematic diagram;
Fig. 6 is the C-C cross-sectional view among the another kind of embodiment Fig. 5 of Zero-friction hard-sealing butterfly valve of the present invention.
Embodiment
Further narrate the present invention below in conjunction with embodiment and accompanying drawing thereof, but it does not limit claim of the present invention.
The Zero-friction hard-sealing butterfly valve (hereinafter to be referred as butterfly valve, referring to Fig. 1-6) of the present invention's design mainly comprises valve body 1, valve plate 3, valve rod 5, valve seat 2 and drive unit thereof that sealing is assembled; It is characterized in that described valve body 1 comprises main valve body 1.1 and auxiliary valve body 1.2 two-part, main valve body 1.1 is that flange connects with bolt with being connected of auxiliary valve body 1.2, both central axes, the junction plane place seals with seal ring 13, and the inner circumference of wherein said main valve body 1.1 is provided with keyway 9; Described valve seat 2 is for making axially movable circular ring along described main valve body 1.1 inwalls, be arranged in the described valve body 1, feather key 8 is installed on the outer peripheral surface of one end, feather key 8 can be along keyway 9 slippages that are arranged on described main valve body 1.1 inner circumferences, inner peripheral surface is equipped with valve seat insert 7, the formation sealing pair matches with the valve plate seal ring 6 that is installed in valve plate 3 outer circumferential edges, the outer peripheral surface of the other end of valve seat 2 is shaped on the outside thread with described drive unit mechanical connection, its pitch is formulated according to valve seat 2 axially movable distances, when moving axially, the sealing surface of valve seat 2 is perpendicular to the central axis of described valve plate 3; One end of the inner peripheral surface of described auxiliary valve body 1.2 is provided with described drive unit bearing 12, and bearing 12 has the axially locating effect; Between described valve seat 2 and drive unit thereof and the described valve body 1 seal ring is installed all; The upper and lower end of described valve rod 5 is connected with valve plate 3 with lower connecting base 18 ' by upper connecting base 18 with taper pin respectively; Having axially off-centre between rotation axis of described valve plate 3 (being valve rod 5 center lines) and the sealing pair plane, is the single eccentric structure of routine.
The drive unit of described valve seat 2 adopts dual mode: a kind of is the worm and gear drive unit, and another kind is a gear device.The structure of described worm and gear drive unit (referring to Fig. 1-2) is: worm gear 11 is circular ring, be installed between main valve body 1.1 and the auxiliary valve body 1.2, the central axes of its gyration center and valve body 1, the inner peripheral surface of worm gear 11 is provided with the internal thread that matches with the described outside thread of valve seat 2 the other ends, worm gear 11 is by single start worm 10 transmissions that are installed in top in the valve body 1, rotate, move axially thereby drive valve seat 2 by power screw; Between described valve seat 2 and worm gear 11 and the described valve body 1 seal ring 14 is installed all.
The upper and lower end of the described main valve body 1.1 of butterfly valve of the present invention also all has last worm hole and the following worm hole (referring to Fig. 4) that worm screw 10 passes, last worm hole outer end is provided with pipe box 22, be that flange is connected with the upper end cap 21 of sealing with bolt on it, following worm hole outer end is provided with down pipe box 23, be that flange is connected with support 25 with bolt on it, be used for connecting driving mechanism (not drawing among Fig. 4).The top of described worm screw 10 is provided with the stuffing box that is enclosed in worm screw 10 outsides, and filler is housed in the stuffing box, and is provided with sleeve and the gland 24 (referring to Fig. 2) that is pressed on the filler.
Described gear device comprises (referring to Fig. 5-6): gear shaft 26, starter receiver 30 and driven gear 33; Driven gear 33 is a circular ring, be installed between main valve body 1.1 and the auxiliary valve body 1.2, the central axes of its gyration center and valve body 1, its inner peripheral surface is provided with the internal thread that matches with the described outside thread of valve seat 2 one ends, the number of teeth of excircle is formulated according to valve seat 2 axially movable distances, driven gear 33 is moved axially thereby drive valve seat 2 by power screw by starter receiver 30 transmissions; Described gear shaft 26 is installed in top in the valve body 1, and starter receiver 30 is installed on the gear shaft 26; Be separately installed with small sealing ring 29 and big sealing ring 28 between described starter receiver 30 and gear shaft 26 and the described main valve body 1.1.For adapting to the needs that gear device is installed, the shape and structure of described valve body 1 needs simple adaptations, and this accommodation those skilled in the art accomplish easily.The valve body 1 of the embodiment of the invention changes: have the left axis hole that gear shaft 26 passes in the upper end of described main valve body 1.1, correspondingly in auxiliary valve body 1.2 upper ends have a right axis hole that gear shaft 26 passes, axis hole outer end, a left side is provided with the gland 27 that is pressed on the starter receiver 30, right axis hole outer end is provided with right pipe box 31, be flange on it, and be connected with the end cap 32 of sealing with bolt; The left end external gear axial brake device of gear shaft 26.
The further feature of butterfly valve of the present invention is that the inner headed face of described valve seat insert 7 is the normal cone face, and the periphery of described valve plate seal ring 6 adopts the normal cone face identical with the inner headed face cone angle of described valve seat insert 7.This designing and manufacturing technique is simple, and cost is low, reliable operation.The present invention is provided with seal ring 14 (shown in Fig. 1,3) at the faying surface of valve seat 2 and described main valve body 1.1 and worm gear 11 and described valve body 1, described seal ring 14 comprises the seal ring of 3 groups of same sizes, they can guarantee that valve seat 2 moves and worm gear 11 (or driven gear 33) when rotating, and butterfly valve has excellent sealing performance; Simultaneously also be provided with seal ring 13, further guarantee the sealing of butterfly valve at the faying surface place that is connected of described main valve body 1.1 and auxiliary valve body 1.2.
The described moving valve base 2 of butterfly valve of the present invention has particular structure, and it can realize that the nothing friction of sealing surface opens and closes, thereby has reduced the keying moment of butterfly valve, the working life of having improved butterfly valve greatly.Moving axially of valve seat 2 is by worm and gear drive unit or gear device smooth drive simultaneously, can make valve seat 2 along the parallel valve plate 3 of pressing to of the central axial direction of valve body during throttle down, can guarantee to produce between sealing surface uniform seal pressure; And described power screw and single start worm transmission all have the reversing drive self-locking performance, can guarantee compressing and excellent sealing performance of sealing surface.
The described feather key 8 that is installed on the valve seat 2 one end outer peripheral surfaces of butterfly valve of the present invention also has and prevents that the valve seat 2 and the power screw resistance of worm gear 11 (or driven gear 33) are excessive and the effect that both rotate in a circumferential direction synchronously occurs; The length of the keyway 9 on the described inner circumference that is arranged on main valve body 1 has the effect that valve seat 2 moves axially distance that limits.During valve open, valve seat 2 axially moves right under worm gear 11 (or driven gear 33) drives earlier, when the right side of feather key 8 contacts with the right side of keyway 9 (shown in Fig. 1,3,5), valve seat 2 moves axially and stops, this moment, the sealing surface of 2 of valve plate 3 and valve seats was thrown off fully, can open valve plate 3 smoothly.
The upper and lower end of the main valve body 1.1 of the described valve body of butterfly valve of the present invention all has upper valve rod hole and lower valve rod hole (referring to Fig. 2) that valve rod 5 passes, and the upper and lower side of described valve plate 3 respectively is provided with upper connecting base 18 and lower connecting base 18 '; Described valve rod 5 passes described upper valve rod hole, upper connecting base 18, lower connecting base 18 ' and lower valve rod hole successively from the top of main valve body 1, be fastenedly connected with taper pin and valve plate 3 respectively between valve rod 5 and upper connecting base 18 and the lower connecting base 18 '; The lower valve rod outer end of hole of main valve body 1 is provided with down pipe box 19, be that flange is connected with the lower end cap 20 of sealing with bolt on it, the upper valve rod outer end of hole of main valve body 1 is provided with pipe box 17, flange on the pipe box 17 is connected with support 15 with bolt, and support 15 is used for connecting the drive unit (not drawing among Fig. 2) of valve rod 5.
Butterfly valve of the present invention has single eccentric structure (referring to Fig. 1,2).This list eccentric structure is meant between the rotation axis (being valve rod 5 center lines) of described valve plate 3 and sealing pair plane (sealing surface and the vertical transverse section of main valve body 1 central axis) and has certain distance that this distance is called axial off-centre, constitutes single eccentric structure of butterfly valve.
The described valve plate 3 of butterfly valve of the present invention is provided with stiffening rib 4, to improve intensity, increases working life.
The described valve rod 5 of butterfly valve of the present invention, worm screw 10 or gear shaft 26 are circumscribed with driving mechanism (not drawing among Fig. 1,4,5).That described driving mechanism can adopt is electronic, manual, surge or the driving mechanism of mode such as pneumatic, uses or supporting very easy to use.
The working principle of butterfly valve of the present invention is: when butterfly valve was opened, the worm screw 10 of worm and gear drive unit rotated counterclockwise earlier, drove worm gear 11 rotations, and worm gear 11 drives valve seat 2 along the central axial direction of valve body 1 move right (referring to Fig. 1) by power screw; Perhaps the gear shaft 26 of gear device clockwise rotates earlier, driving starter receiver 30 rotates, transfer driven gear 33 is rotated counterclockwise, drive valve seat 2 along the central axial direction of valve body 1 move right (referring to Fig. 5) by power screw, unclamp compressing to valve plate 3, valve seat insert 7 and valve plate seal ring 6 are broken away from, till the feather key 8 on the valve seat 2 one end outer peripheral surfaces touches the right side of valve body keyway 9, make the sealing surface (being the sealing surface that valve seat insert 7 and valve plate seal ring 6 are formed) of butterfly valve be separated from a segment distance, the pressure of valve body 1 inner chamber reduces greatly, rotation valve rod 5 then, drive valve plate 3 and turn 90 degrees, butterfly valve is opened at frictionless situation backspin.When butterfly valve cut out, after valve plate 3 was turned back to original position, existed certain axial distance between valve seat insert 7 and the valve plate seal ring 6 this moment, but both central axis are in the coincidence position; Worm screw 10 clockwise rotates and drives worm gear 11 rotations then, and worm gear 11 drives valve seat 2 along the parallel valve plate seal ring 6 of pressing to of the central axial direction of valve body by power screw; Perhaps the gear shaft 26 of gear device rotates counterclockwise, driving starter receiver 30 rotates, transfer driven gear 33 turns clockwise, drive valve seat 2 along the parallel valve plate seal ring 6 of pressing to of the central axial direction of valve body 1 by power screw, compress valve plate 3 until valve seat 2, sealing surface seals fully, and butterfly valve cuts out.
The present invention does not address part and is applicable to prior art.The different embodiments of using for reference the prior art generation simultaneously are the specific embodiment of the present invention.
Employed when the mounting point of described structure of butterfly valve of the present invention or component or direction " on ", D score, " left side ", " right side ", " interior ", " outward " etc. are that the orientation with given accompanying drawing is a foundation, they only are in order to express easily, be used for distinguishing the relative position of each parts or direction, the orientation when not representing butterfly valve of the present invention to use.
Claims (6)
1. Zero-friction hard-sealing butterfly valve, this butterfly valve mainly comprises valve body, valve rod, valve plate, valve seat and the valve seat drive unit of sealing assembling, it is characterized in that described valve body comprises main valve body and auxiliary valve body two-part, main valve body and auxiliary valve body central axes are tightly connected by flange bolt; The inner circumference of described main valve body is provided with keyway; Described valve seat is a circular ring, be arranged in the described valve body, on the outer peripheral surface of one end feather key is installed, and can be along the keyway axial slip of described main valve body, the inner peripheral surface of valve seat is equipped with valve seat insert, the formation sealing pair that matches with the valve plate seal ring that is installed in the valve plate outer circumferential edges, the outer peripheral surface of the valve seat the other end is shaped on the outside thread with described drive unit mechanical connection; One end of the inner peripheral surface of described auxiliary valve body is provided with the drive unit bearing; The upper and lower end of described valve rod is connected with valve plate with lower connecting base by upper connecting base with taper pin respectively; There is axially off-centre between the rotation axis of described valve plate and the sealing pair plane, is single eccentric structure.
2. Zero-friction hard-sealing butterfly valve according to claim 1, it is characterized in that described valve seat drive unit is the worm and gear drive unit, structure is: worm gear is a circular ring, be installed between main valve body and the auxiliary valve body, the central axes of its gyration center and valve body, the inner peripheral surface of worm gear is provided with the internal thread that matches with valve seat the other end outside thread, and worm gear is driven valve seat and moved axially by the single start worm transmission that is installed in top in the valve body; One end of the inner peripheral surface of described auxiliary valve body is provided with the described drive unit bearing as the described worm gear of axially locating; Between described valve seat and worm gear and the described valve body seal ring is installed all.
3. Zero-friction hard-sealing butterfly valve according to claim 1, it is characterized in that described valve seat drive unit is a gear device, comprise gear shaft, starter receiver and driven gear, driven gear is a circular ring, be installed between main valve body and the auxiliary valve body, the central axes of its gyration center and valve body, its inner peripheral surface are provided with the internal thread that matches with the described outside thread of the valve seat the other end; Driven gear is driven valve seat and is moved axially by the starter receiver transmission; Described gear shaft is installed in top in the valve body, and starter receiver is installed on the gear shaft; Be separately installed with seal ring between described starter receiver and gear shaft and the described main valve body.
4. according to claim 1,2 or 3 described Zero-friction hard-sealing butterfly valves, the inner headed face that it is characterized in that described valve seat insert is the normal cone face, and the periphery of described valve plate seal ring is the normal cone face identical with the inner headed face cone angle of described valve seat insert.
5. Zero-friction hard-sealing butterfly valve according to claim 1 is characterized in that the top of described valve rod is provided with the stuffing box that is enclosed in the valve rod outside, filler is housed in the stuffing box, and is provided with sleeve and the gland that is pressed on the filler.
6. Zero-friction hard-sealing butterfly valve according to claim 1 is characterized in that described valve plate is provided with stiffening rib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101524329A CN101382199B (en) | 2008-10-22 | 2008-10-22 | Zero-friction hard-sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101524329A CN101382199B (en) | 2008-10-22 | 2008-10-22 | Zero-friction hard-sealing butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101382199A CN101382199A (en) | 2009-03-11 |
| CN101382199B true CN101382199B (en) | 2010-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101524329A Expired - Fee Related CN101382199B (en) | 2008-10-22 | 2008-10-22 | Zero-friction hard-sealing butterfly valve |
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| CN (1) | CN101382199B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864106A (en) * | 2015-05-26 | 2015-08-26 | 柳州钢铁股份有限公司 | Metal hard sealing butterfly valve with moving valve seat |
| CN105240545B (en) * | 2015-10-31 | 2017-07-28 | 河北工业大学 | A kind of dual drive is without friction hard-sealing butterfly valve |
| CN109237050A (en) * | 2018-10-30 | 2019-01-18 | 萨姆森控制设备（中国）有限公司 | A kind of three-eccentric-butterfly-valve and preparation method thereof |
| CN109780233B (en) * | 2019-03-20 | 2020-06-05 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Valve and drainage device |
| CN110735956B (en) * | 2019-11-08 | 2024-04-30 | 昆山嘉科环保设备有限公司 | Isolation valve for pipeline explosion |
| CN112283363B (en) * | 2020-11-17 | 2022-10-28 | 浙江理工大学 | Adjustable sealing butterfly valve |
| CN116753311B (en) * | 2023-08-21 | 2023-11-03 | 江苏祥荣机械制造有限公司 | Eccentric butterfly valve with good sealing performance |
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2008
- 2008-10-22 CN CN2008101524329A patent/CN101382199B/en not_active Expired - Fee Related
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