CN103322211B - A kind of without pin connection metallic seal butterfly valve - Google Patents
A kind of without pin connection metallic seal butterfly valve Download PDFInfo
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- CN103322211B CN103322211B CN201310254627.5A CN201310254627A CN103322211B CN 103322211 B CN103322211 B CN 103322211B CN 201310254627 A CN201310254627 A CN 201310254627A CN 103322211 B CN103322211 B CN 103322211B
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Abstract
The invention discloses a kind of without pin connection metallic seal butterfly valve, including rear bearing block assembly, follower bolt and nut, filler, valve body, valve rod, valve plate, filler pressing sleeve, hold-down grid, front-end bearing pedestal assembly, the two ends of valve body have stuffing hole, filler it is provided with in stuffing hole, filler is extruded by filler pressing sleeve and hold-down grid, filler pressing sleeve and hold-down grid adopt follower bolt and nut to be fixed on valve body, rear bearing block assembly and front-end bearing pedestal assembly are placed on the two ends of valve body respectively, valve rod is positioned and transmission by the bearing in rear bearing block assembly and front-end bearing pedestal assembly, valve plate is coupled with valve rod by spline structure.The present invention is by adopting the butterfly valve coupled without pin, avoid valve internal and there is the possibility of parts loosening or easy to fall off, and bearing is moved to outside valve body, eliminate the friction phenomenon existed between valve rod and axle sleeve, three eccentricity valve plate and the design of U-shaped valve seat construction ensure that valve " zero friction " in opening-closing process, it is adaptable to fast shut-off occasion.
Description
[technical field]
The present invention relates to the technical field coupling metallic seal butterfly valve without pin, being particularly well-suited to medium is the technical field controlling butterfly valve in inflammable and explosive pipe-line system.
[background technology]
Butterfly valve has the features such as simple in construction, cost be low, is widely used in every field such as oil, chemical industry, Coal Chemical Industry, light industry.In existing butterfly valve, its internal valve rod couples with the fixing generally employing taper bolt between valve plate, for preventing pin in valve use procedure from coming off, is that pin is fixed frequently with spot welding mode so that valve is more difficult in dismounting or maintenance process；Furthermore, the mode of spot welding is also insecure, meets High Temperature High Pressure or stress deformation there will be pin and comes off.Under the special operation condition that some media are inflammable and explosive (such as hydrogen), require that valve internal structure can not have to loosen or caducous parts, to prevent valve from loosening in running or caducous parts come off, and valve body or inner-walls of duct occur to clash into and produce spark, blast.Meanwhile, these special operation conditions require that valve realizes quickly interlocking when fault action.In the occasion that some pipe diameters are smaller, it is typically chosen ball valve to realize control.When pipe diameter is bigger, the cost of ball valve is higher than the butterfly valve of same size a lot.
Current butterfly valve structure adopts pin to couple, and valve internal easily loosens, parts easy to fall off, and bearing exists friction phenomenon between valve inner, valve rod and axle sleeve, and valve entirety exists the problems such as sealing is poor, service life is shorter, security reliability is poor.
[summary of the invention]
The purpose of the present invention solves the problems of the prior art exactly, propose a kind of without pin connection metallic seal butterfly valve, the friction phenomenon existed between valve rod and axle sleeve can be eliminated, solve valve internal parts and easily loosen and caducous problem, promote security reliability, increase the service life.
For achieving the above object, the present invention proposes a kind of without pin connection metallic seal butterfly valve, including rear bearing block assembly, follower bolt and nut, filler, valve body, valve rod, valve plate, filler pressing sleeve, hold-down grid, front-end bearing pedestal assembly, the two ends of valve body have stuffing hole, filler it is provided with in stuffing hole, described filler is extruded by filler pressing sleeve and hold-down grid, filler pressing sleeve and hold-down grid adopt follower bolt and nut to be fixed on valve body, described rear bearing block assembly and front-end bearing pedestal assembly are placed on the two ends of valve body respectively, described valve rod is positioned and transmission by the bearing in rear bearing block assembly and front-end bearing pedestal assembly, valve rod adopts integral structure, valve plate is coupled with valve rod by spline structure；Being provided with valve seat between described valve plate and valve body, described valve seat is U-shaped valve seat, and the empennage of valve seat is bumped into and is fixed in the valve seat trim ring of valve outlet side by hexagon socket head cap screw, and seat design is floating type, has the function of automatic central adjusting under the effect of valve plate.
As preferably, described valve plate is three eccentricity structure, makes sealing surface ovalize conical structure.
As preferably, also including filler spacer ring, described filler is separated to form double-layer seal by filler spacer ring.
As preferably, also including pretightening butterfly spring, arrange pretightening butterfly spring between described follower bolt and nut and hold-down grid.
As preferably, also including stop collar, described stop collar is arranged in the stuffing hole of valve body, and the cylindrical of stop collar and valve body are interference fits, it is prevented that stop collar rotates；Exist between front end face and the valve plate of described stop collar and adjust gap；Gap is there is, it is prevented that stop collar and valve rod rub between described stop collar and valve rod.
As preferably, described front-end bearing pedestal assembly includes front-end bearing pedestal, front deep groove ball bearing, gland screw, front gland, described front-end bearing pedestal and valve body are fixedly connected, described front deep groove ball bearing is built in front-end bearing pedestal, the outer ring of front deep groove ball bearing is positioned by front gland, front step on described valve rod is positioned by the inner ring of front deep groove ball bearing, and front gland is fixedly connected by gland screw and front-end bearing pedestal；Rear bearing block assembly includes gland screw, rear pressing cover, rear deep groove ball bearing, adjusts spacer, rear bearing block, described rear bearing block and valve body are fixedly connected, rear deep groove ball bearing is built in rear bearing block, the outer ring of rear deep groove ball bearing is positioned by rear pressing cover, rear pressing cover is fixedly connected by gland screw and rear bearing block, is provided with adjustment spacer between inner ring and the backward step of valve rod of rear deep groove ball bearing.
As preferably, being provided with anti-static device between described valve body and valve plate, described anti-static device is made up of cylindrical spring and steel ball.
Beneficial effects of the present invention: the present invention is by adopting the butterfly valve coupled without pin, avoid valve internal and there is the possibility of parts loosening or easy to fall off, and bearing is moved to outside valve body, eliminate the friction phenomenon existed between valve rod and axle sleeve, ensure that valve " zero friction " in opening-closing process, valve-stem integrated structure ensure that the form and position tolerance of valve, and anti-static device eliminates mutual fricative electrostatic phenomenon between valve components.Valve is made to have good airproof performance, long service life, safe and reliable feature.Can be widely used for the fields such as oil, chemical industry, Coal Chemical Industry, light industry, being particularly well-suited to medium is the process control in inflammable and explosive pipe-line system, and can be applicable to fast shut-off occasion.
Inventive feature and advantage will be described in detail in conjunction with accompanying drawing by embodiment.
[accompanying drawing explanation]
Fig. 1 is a kind of structural representation coupling metallic seal butterfly valve without pin of the present invention；
Fig. 2 is the structural representation of a kind of front-end bearing pedestal assembly coupled without pin in metallic seal butterfly valve of the present invention；
Fig. 3 is the structural representation of a kind of rear bearing block assembly coupled without pin in metallic seal butterfly valve of the present invention；
Fig. 4 is that the present invention is a kind of couples the schematic diagram sealing structure in metallic seal butterfly valve without pin.
In figure: 1-rear bearing block assembly, 2-follower bolt and nut, 3-pretightening butterfly spring, 4-filler, 5-filler spacer ring, 6-valve body, 7-stop collar, 8-anti-static device, 9-valve rod, 10-valve plate, 11-filler pressing sleeve, 12-hold-down grid, 13-front-end bearing pedestal assembly, 14-front-end bearing pedestal, deep groove ball bearing before 15-, 16-gland screw, gland before 17-, 18-rear pressing cover, deep groove ball bearing after 19-, 20-adjusts spacer, 21-rear bearing block, 22-valve seat, 23-sealing ring, 24-soket head cap screw, 25-valve seat trim ring, 26-gasket seal.
[detailed description of the invention]
Consult Fig. 1, the present invention is without pin metallic seal butterfly valve, including rear bearing block assembly 1, follower bolt and nut 2, pretightening butterfly spring 3, filler 4, filler spacer ring 5, valve body 6, stop collar 7, anti-static device 8, valve rod 9, valve plate 10, filler pressing sleeve 11, hold-down grid 12, front-end bearing pedestal assembly 13, described rear bearing block assembly 1 and front-end bearing pedestal assembly 13 are placed on valve body 6 stuffing hole two ends respectively, it is fixedly connected by screw and alignment pin and valve body, described valve rod 9 is positioned and transmission by the bearing in rear bearing block assembly 1 and front-end bearing pedestal assembly 13, greatly reduce the frictional force of valve, reduce the keying moment of valve.Described valve body 6 is one piece casting or forging type, described filler 4 is arranged in the stuffing hole of valve body 6, described filler 4 is separated to form double-layer seal by filler spacer ring 5, ensure the preload of filler simultaneously, described filler 4 carries out pretension by adjusting follower bolt and nut 2, extruded by filler pressing sleeve 11 and hold-down grid 12, realize the sealing of filler 4, it is additionally provided with pretightening butterfly spring 3 between described follower bolt and nut 2 and hold-down grid 12, when in valve use procedure, filler 4 occurs that trace weares and teares, pretightening butterfly spring 3 can realize from pretension function, increase valve service life, described stop collar 7 is arranged in valve body 6 afterbody stuffing hole, it is positioned on valve body 6 by afterbody, the cylindrical of stop collar 7 and valve body 6 are interference fits simultaneously, prevent stop collar 7 from rotating, certain slight clearance is there is between the front end face of stop collar 7 and valve plate 10, for preventing valve plate 10 from axial displacement in use occurring, certain interval is there is between described stop collar 7 and valve rod 9, prevent the phenomenon that phase mutual friction occurs between stop collar 7 with valve rod 9, described valve rod 9 is integral type structure, positioned by rear bearing parts 1 and fore bearing parts 13, ensure that the form and position tolerance of valve, the intensity of valve rod 9 meets design pressure requirement simultaneously, and between valve body 6 and valve plate 10, it is provided with anti-static device 8, make between valve body 6 and valve plate 10 the good electric conductivity of keeping all the time, eliminate valve components due to mutual fricative electrostatic phenomenon, spline is adopted to couple between described valve rod 9 and valve plate 10, avoid pin when tradition butterfly valve plate adopts pin to couple easy to fall off and produce pyrophoric phenomenon, make whole valve cavity without any parts easily loosening or coming off.
Couple for spline between valve body 6 with valve rod 9, make valve internal without any loosening parts, it is to avoid when original employing pin couples, pin is easy to fall off and produce pyrophoric phenomenon.Valve plate 10 is designed as three eccentricity structure, the ellipticarch cone body making sealing surface be a uniqueness.Sealing surface entirety pile-up welding hard alloy, improves sealing surface hardness, strengthens the performances such as wear-resisting, corrosion-resistant.Valve plate 10 produces under axial force under the effect of eccentric angle, and during valve closing, the active force of valve plate 10 makes U-shaped valve seat 22 deform upon, until both tight connectings, forms the linear sealing of metal to metal；When opening, valve plate 10 sealing surface can realize departing from rapidly the valve seat 22 of U-shaped, forms " zero friction ", increases valve service life.Greatly reduce frictional resistance and sealing surfaces abrasion, decrease valve opening moment, extend valve service life, effectively prevent the electrostatic phenomenon owing to sliding friction produces simultaneously.
Consult Fig. 2, front-end bearing pedestal assembly 13 of the present invention, including front-end bearing pedestal 14, front deep groove ball bearing 15, gland screw 16, front gland 17, described front-end bearing pedestal 14 is fixedly connected by screw and alignment pin and valve body 6, described front deep groove ball bearing 15 is built in front-end bearing pedestal 14, the outer ring of front deep groove ball bearing 15 is positioned by front gland 17, front step on described valve rod 9 is positioned by the inner ring of front deep groove ball bearing 15, effectively prevent valve rod 9 from flying out, on valve rod 9, it is provided with anti-static device installing hole simultaneously, described anti-static device 8 is made up of cylindrical spring and steel ball, make to remain between valve plate 10 and valve body 6 good electric conductivity, eliminate valve components due to mutual fricative electrostatic phenomenon.Described front gland 17 is fixedly connected by gland screw 16 and front-end bearing pedestal 14.Described front deep groove ball bearing 15 adopts the deep groove ball bearing (contact) of two sides band sealing ring so that in bearing, steel ball is effectively protected, and has the feature of long service life.
Consult Fig. 3, rear bearing block assembly 1 of the present invention, including gland screw 16, rear pressing cover 18, rear deep groove ball bearing 19, adjust spacer 20, rear bearing block 21, described rear bearing block 21 is fixedly connected by screw and alignment pin and valve body 6, described rear deep groove ball bearing 19 is built in rear bearing block 21, the outer ring of rear deep groove ball bearing 19 is positioned by rear pressing cover 18, and described rear pressing cover 18 is fixedly connected by gland screw 16 and rear bearing block 21.It is provided with adjustment spacer 20 between inner ring and the backward step of valve rod 9 of described rear deep groove ball bearing 19, makes valve plate 10 be positioned at valve center by suitably adjusting the size of this adjustment spacer 20, it is ensured that the serviceability of valve.Described rear deep groove ball bearing 19 adopts the deep groove ball bearing (contact) of two sides band sealing ring equally, and in the bearing made, steel ball is effectively protected, and has the feature of long service life.
Front-end bearing pedestal 14 and rear bearing block 21 are separately positioned on the two ends of valve body 6, it is fixedly connected by screw and alignment pin and valve body 6, front deep groove ball bearing 15 and rear deep groove ball bearing 19 it is respectively equipped with in front-end bearing pedestal 14 and rear bearing block 21, instead of original phenomenon that axle sleeve is set at valve inner, eliminate the friction between axle sleeve and valve rod 9, adjustment spacer 20 it is provided with between deep groove ball bearing 19 and valve rod 9 after simultaneously, it is provided with stop collar 7 at valve nose, it is effectively ensured valve plate 10 all the time in valve center, reduce the frictional force of valve rod 9 simultaneously, reduce valve opening and closing moment, improve service life.Described front deep groove ball bearing 15 and rear deep groove ball bearing 19 adopt the deep groove ball bearing of two sides band contact sealing ring, it is prevented that rainwater or dust enter, long service life.
Consult Fig. 4, seal member of the present invention, including valve plate 10, valve seat 22, sealing ring 23, soket head cap screw 24, valve seat trim ring 25, gasket seal 26, described valve plate 10 is three eccentricity structure, its sealing surface is by the special ellipticarch cone body being processed into a uniqueness, and the whole equal pile-up welding hard alloy of sealing surface, make valve plate 10 sealing surface have the features such as wear-resisting, corrosion-resistant.All valve seats 22 are placed on valve body 6, positioned by valve seat trim ring 25, valve seat 22 adopts " U " type becket structure, sealing surface is circular arc line, valve seat 22 empennage while being placed on valve body 6, another side near valve seat trim ring 25, and and be provided with gasket seal 26 between valve seat trim ring 25, described valve seat trim ring 25 is fixed on valve body 6 by soket head cap screw 24, and and is provided with sealing ring 23 between valve body 6.By sealing ring 23 and gasket seal 26, it is possible to well ensure the sealing of valve seat 22 afterbody.U-shaped valve seat 22 adopts martensitic stain less steel or the INCONEL alloy of better mechanical property, has better resilience.Valve seat 22 empennage is bumped into and is fixed in the valve seat trim ring 25 of valve body 6 outlet side by hexagon socket head cap screw, and seat design is floating type, has the function of automatic central adjusting under the effect of valve plate 10.
The present invention realizes principle: the present invention couples metallic seal butterfly valve without pin, coupling employing spline between valve body 6 with valve rod 9, it is to avoid valve internal exists and loosens or the possibility of parts easy to fall off.Valve rod 9 adopts integral structure, and positioned and transmission by the bearing in external rear bearing block assembly 1 and front-end bearing pedestal assembly 13, substantially increase the concentricity of valve, reduce the frictional force of valve, reduce the keying moment of valve, avoid the phenomenon of valve rod 10 and shaft room generation friction simultaneously.Valve rod 10 is additionally provided with anti-static device 8, makes the electric conductivity that the maintenance of valve each parts part is good, it is possible to eliminate the electrostatic that valve produces in running.Valve plate 10 adopts three eccentricity structure, produces under axial force under the effect of eccentric angle, and during valve closing, the active force of valve plate 10 makes valve seat 22 deform upon, until both tight connectings, forms the linear sealing of metal to metal；When opening, valve plate 10 sealing surface can realize disengaging valve seat 22 rapidly, is formed " zero friction ", increases valve service life；This structure greatly reduces the frictional resistance of sealing pair and sealing surfaces abrasion, decreases valve opening moment, extends valve service life, it is possible to suitable in fast shut-off occasion, effectively prevent the electrostatic phenomenon owing to sliding friction produces simultaneously.Valve seat 22 is U-shaped becket, can axial float, there is certain gap between valve seat 22 and valve seat trim ring 25, it is possible to according to the center of power automatic capturing valve plate 10 that valve plate 10 applies；Meanwhile, valve seat 22 inner chamber is hollow structure, and medium can enter, and makes valve seat 22 have certain dilatancy, more can be effectively ensured valve seal, improves valve service life；The sealing ring 23 at valve seat 22 place and gasket seal 26 ensure that medium is without any possibility leaked.
Above-described embodiment is the description of the invention, is not limitation of the invention, any scheme after simple transformation of the present invention is belonged to protection scope of the present invention.
Claims (4)
1. one kind couples metallic seal butterfly valve without pin, it is characterized in that: include rear bearing block assembly (1), follower bolt and nut (2), filler (4), valve body (6), valve rod (9), valve plate (10), filler pressing sleeve (11), hold-down grid (12), front-end bearing pedestal assembly (13), the two ends of valve body (6) have stuffing hole, filler (4) it is provided with in stuffing hole, described filler (4) is extruded by filler pressing sleeve (11) and hold-down grid (12), filler pressing sleeve (11) and hold-down grid (12) adopt follower bolt and nut (2) to be fixed on valve body (6), described rear bearing block assembly (1) and front-end bearing pedestal assembly (13) are placed on the two ends of valve body (6) respectively, described valve rod (9) is positioned and transmission by the bearing in rear bearing block assembly (1) and front-end bearing pedestal assembly (13), valve rod (9) adopts integral structure, valve plate (10) is coupled with valve rod (9) by spline structure；Valve seat (22) it is provided with between described valve plate (10) and valve body (6), described valve seat (22) is U-shaped valve seat, and the empennage of valve seat (22) is bumped into and is fixed in the valve seat trim ring (25) of valve body (6) outlet side by hexagon socket head cap screw (24)；Also including stop collar (7), described stop collar (7) is arranged in the stuffing hole of valve body (6), and the cylindrical of stop collar (7) and valve body (6) are interference fits, it is prevented that stop collar (7) rotates；Exist between front end face and the valve plate (10) of described stop collar (7) and adjust gap, between stop collar (7) and valve rod (9), there is gap；Described front-end bearing pedestal assembly (13) includes front-end bearing pedestal (14), front deep groove ball bearing (15), gland screw (16), front gland (17), described front-end bearing pedestal (14) and valve body (6) are fixedly connected, described front deep groove ball bearing (15) is built in front-end bearing pedestal (14), the outer ring of front deep groove ball bearing (15) is by front gland (17) location, front step on described valve rod (9) is positioned by the inner ring of front deep groove ball bearing (15), front gland (17) is fixedly connected by gland screw (16) and front-end bearing pedestal (14)；Rear bearing block assembly (1) includes gland screw (16), rear pressing cover (18), rear deep groove ball bearing (19), adjust spacer (20), rear bearing block (21), described rear bearing block (21) and valve body (6) are fixedly connected, rear deep groove ball bearing (19) is built in rear bearing block (21), the outer ring of rear deep groove ball bearing (19) is by rear pressing cover (18) location, rear pressing cover (18) is fixedly connected by gland screw (16) and rear bearing block (21), adjustment spacer (20) it is provided with between inner ring and the backward step of valve rod (9) of rear deep groove ball bearing (19)；Being provided with anti-static device (8) between described valve body (6) and valve plate (10), described anti-static device (8) is made up of cylindrical spring and steel ball；Described front deep groove ball bearing (15) and rear deep groove ball bearing (19) all adopt the deep groove ball bearing of two sides band sealing ring.
2. as claimed in claim 1 a kind of without pin connection metallic seal butterfly valve, it is characterised in that: described valve plate (10) is three eccentricity structure, makes sealing surface ovalize conical structure.
3. as claimed in claim 1 a kind of without pin connection metallic seal butterfly valve, it is characterised in that: also including filler spacer ring (5), described filler (4) is separated to form double-layer seal by filler spacer ring (5).
4. as claimed in claim 1 a kind of without pin connection metallic seal butterfly valve, it is characterized in that: also include pretightening butterfly spring (3), described follower bolt and pretightening butterfly spring (3) is set between nut (2) and hold-down grid (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310254627.5A CN103322211B (en) | 2013-06-24 | 2013-06-24 | A kind of without pin connection metallic seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310254627.5A CN103322211B (en) | 2013-06-24 | 2013-06-24 | A kind of without pin connection metallic seal butterfly valve |
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| Publication Number | Publication Date |
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| CN103322211A CN103322211A (en) | 2013-09-25 |
| CN103322211B true CN103322211B (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310254627.5A Active CN103322211B (en) | 2013-06-24 | 2013-06-24 | A kind of without pin connection metallic seal butterfly valve |
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| CN (1) | CN103322211B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644309B (en) * | 2013-11-20 | 2017-01-18 | 江苏亿阀集团有限公司 | Low temperature resistant butterfly valve |
| CN104676019B (en) * | 2015-03-04 | 2017-09-22 | 江苏神通阀门股份有限公司 | The axial limit structure of butterfly valve |
| CN105485355B (en) * | 2016-01-21 | 2018-06-08 | 江南阀门有限公司 | A kind of hard sealing low temperature butterfly valve and its encapsulating method |
| CN109931419A (en) * | 2019-04-09 | 2019-06-25 | 温州市瓯斯特阀门有限公司 | A kind of wear-resisting separable type fixing ball valve |
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| US8172202B2 (en) * | 2009-04-24 | 2012-05-08 | Honeywell International Inc. | Butterfly valve assembly including a bearing assembly for serrated spline constraint |
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| EP0017583A1 (en) * | 1979-04-10 | 1980-10-15 | Omnibrev Holding Ag | Precision butterfly valve |
| CN2451831Y (en) * | 2000-11-03 | 2001-10-03 | 黄云平 | Metal sealing buttetfly valve |
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| CN103322211A (en) | 2013-09-25 |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 313100 No. 659 Changxin Avenue, Taihu street, Zhejiang, Changxing County Applicant after: ZHEJIANG ZHONGDE AUTOMATIC CONTROL TECHNOLOGY CO., LTD. Address before: 313100, No. three, No. 659, Changxin Economic Development Zone, Huzhou, Zhejiang Applicant before: Zhejiang Zhongde Automatic Control Valve Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: ZHEJIANG ZHONGDE AUTOMATIC CONTROL VALVE CO., LTD. TO: ZHEJIANG ZHONGDE AUTOMATIC CONTROL TECHNOLOGY CO., LTD. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |