CN102155580B - Valve with bellows seal - Google Patents
Valve with bellows seal Download PDFInfo
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- CN102155580B CN102155580B CN201110090255A CN201110090255A CN102155580B CN 102155580 B CN102155580 B CN 102155580B CN 201110090255 A CN201110090255 A CN 201110090255A CN 201110090255 A CN201110090255 A CN 201110090255A CN 102155580 B CN102155580 B CN 102155580B
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Abstract
The invention provides a valve with bellows seal which has reasonable structure and large expansion deformation amount. The valve comprises a valve body, a valve cap arranged on the valve body, a valve clack, a valve rod, a bellows and a driving mechanism, wherein the bellows comprises a plurality of dished ring plates; the dished ring plates are provided with dished ring plate through holes for the valve rod to penetrate through; the peripheries of outer edges of the dished ring plates are outer diameters; the peripheries of inner edges of the dished ring plates are inner diameters; outer diameter end surfaces and inner diameter end surfaces of the dished ring plates are located at different planes; the inner diameters are arranged at the same side of the outer diameter end surfaces; the outer diameters and the inner diameters of each dished ring plate are sequentially staggered and are fixedly connected in a sealing way; and the centers of circles of the inner diameters of the dished ring plates are arranged at the same straight line so as to form an integral bellows. When the bellows is stretched and deformed, positions of wave crests and wave troughs of the bellows basically do not become deformed, therefore, the deformation amount of the bellows is higher than that of the traditional bellows, the structure is more compact and reasonable, and the sealing effect is more obvious.
Description
Technical field
The present invention relates to a kind of valve, especially a kind of valve with sylphon seal.
Background technique
Be used to transmit valve poisonous, danger medium for some; Usually require its valve rod position to have fabulous sealability; Leak to prevent poisonous dangerous substance; The valve rod that typically is applicable to this type valve of poisonous, the danger medium of transmission adopts packing seal usually, but packing seal easy ageing and leaking usually in use for some time, thus bring very big danger to the user.As shown in Figure 1, for the sealing effect that can make valve rod place reliable sealing more, adopt bellows to carry out the sealing of valve rod as Sealing at present usually; It is so-called Bellows valve; This Bellows valve has obtained using widely in the strict occasion of many seal requests, but the stem travel of many Bellows valves is very big, especially bellows gate valve and heavy caliber bellows stop valve; Bellows in the existing Bellows valve adopts the fabrication techniques of shaped by fluid pressure; Crest and trough on the bellows of making thus are the circular-arc of arc transition, and prepared single bellows wall thickness can not be too thick, otherwise the bellows shaped by fluid pressure is difficult; And if produce the thicker bellows of wall thickness through developing skill, then elastic deformability's variation of bellows influences the work of valve.And because bellows dilatation amount is less; Usually amount of deformation is about 30% of a bellows effective length; Be out of shape when excessive; Cause the plastic deformation and the fatigue ruption at bellows crest and trough position easily, therefore, in practical application and production, adopt usually two or more bellowss are linked together to satisfy the needs of valve amount of deformation.But because bellows need bear huge pressure medium, and the wall thickness of bellows is less, so the joint of bellows can become the weak part of bellows usually, the defective of welding part can cause the seal failure of bellows usually.
In addition; Because bellows is extremely thin, and valve rod is very thick, both thickness difference are very big; In bellows and valve rod welding process usually easily with the bellows burn-through; Even welding is fine, this position also becomes the weak part of Bellows valve usually, and the defective of welding part can cause the seal failure of bellows.
Summary of the invention
In order to overcome the deficiency of existing technology, it is rational in infrastructure to the invention provides a kind of raising, and the dilatation amount is big, and the valve of the band sylphon seal of good sealing effect.
The technical solution adopted for the present invention to solve the technical problems is: a kind of valve with sylphon seal; Include valve body and install valve gap, flap, valve rod, bellows and the driving mechanism on valve body, valve body be provided with valve pocket, with first fluid passage and second fluid passage and the space, conducting valve pocket inside and outside of conducting valve pocket respectively and the valve rod installation channel that supplies valve rod to install, flap is positioned between the first fluid passage and second fluid passage and constitutes the opening and closing of valve pocket; Offer the valve rod mounting hole that supplies valve rod to wear on the said valve gap; Valve gap is fixed in the open end of valve rod installation channel, an end of valve rod and flap interlock, the other end and driving mechanism interlock; Bellows is sheathed on the valve rod and is positioned at the valve rod installation channel; One end of bellows and valve gap constitute fixed seal connection, and the other end and valve rod fixed seal connection is characterized in that: said bellows is made up of a plurality of dish-shaped ring plates; This dish ring plate is provided with and supplies valve rod to wear the dish-shaped ring plate through hole of usefulness; The outer marginal circumference of this dish ring plate is an external diameter, and the inner edge circumference of said dish-shaped ring plate through hole is an internal diameter, and this dish ring plate top external diameter and internal diameter place end face lay respectively on the Different Plane; And internal diameter is positioned at the same side of external diameter place end face; The staggered successively fixed seal connection of the external diameter of each dish-shaped ring plate and external diameter and internal diameter and internal diameter, and the center of circle of internal diameter all is located along the same line on each dish-shaped ring plate, constitutes holistic bellows thus.
Adopt technique scheme, different with crest and trough on traditional bellows, external diameter and external diameter and internal diameter and internal diameter adopt the Pervasion Weld Technology fixing seal respectively between each annular video disc; Then when bellows tensile buckling; The crest of bellows and trough position can not deform basically, are not easy to produce fatigue ruption thus, make that bellows amount of deformation of the present invention is the several times of traditional bellows of equal length yet; Structure is compact and reasonable more, and sealing effect is also more remarkable.Wherein, the length of bellows can realize through the number that increases or reduce dish-shaped ring plate, is fit to very much installing of different length valve rod.Outside diameter of bel and internal diameter place end face can be not parallel among the present invention; As long as bellows structure can be realized supplying valve rod to pass; And each dish-shaped ring plate has certain axial compression space, then after each dish-shaped ring plate such as above-mentioned Diffusion Welding, all can realize the object of the invention.
Of the present inventionly further be set to: said dish-shaped ring plate is for circular; Dish ring plate through hole is circular and is opened in the central authorities of dish-shaped ring plate; Each dish-shaped ring plate top external diameter and internal diameter place end face are arranged in parallel, and external diameter and external diameter and internal diameter and internal diameter place end face is fitted each other and sealed welding between each adjacent dish-shaped ring plate.
Adopt technique scheme, the welding end is that face and face are adjacent to welding each other on each dish-shaped ring plate, and the situation appearance that the traditional ripple tube wave peak that does not have shaped by fluid pressure is flattened and damages is so can bear the more valve of high pressure.Most preferably one of scheme of the present invention is that each dish-shaped ring plate top external diameter and internal diameter place end face are the plane that is arranged in parallel.
Of the present inventionly further be set to again: the fixed base that also is provided with annular on the said bellows; Fixed base is provided with the fixed base through hole that supplies valve rod to pass; This fixed base is fixedly connected on two open end of bellows respectively; Bellows is sheathed on the valve rod, wherein a fixed base outer rim and the fixed seal connection of valve gap upper valve rod mounting hole, another fixed base upper fixed seat through hole and the fixed seal connection of valve rod outer wall.
Adopt technique scheme, fixed base self is thicker, thereby has avoided because of some bellows tube wall is thinner, and the problem of when welding fixedly with valve gap or valve rod, being welded leakage occurs.
Below in conjunction with accompanying drawing the present invention is further described.
Description of drawings
Fig. 1 is the partial cutaway schematic representation of traditional bellows.
Fig. 2 is the partial cutaway schematic representation of the embodiment of the invention.
Fig. 3 is the partial cutaway schematic representation of embodiment of the invention bellows.
Fig. 4 is the partial cutaway schematic representation of embodiment of the invention dish ring plate.
Embodiment
Like Fig. 2,3, shown in 4; Present embodiment includes valve body 1 and installs valve gap 2, flap 3, valve rod 4, bellows 5 and the driving mechanism 6 on valve body 1; Valve body 1 be provided with valve pocket 11, with first fluid passage 111 and second fluid passage 112 and the conducting valve pocket space, 11 inside and outside of conducting valve pocket 11 respectively and the valve rod installation channel 12 that supplies valve rod 4 to install; Flap 3 is positioned at first fluid passage 111 and 112 of second fluid passages and constitutes the opening and closing of valve pocket 11; Offer the valve rod mounting hole 21 that supplies valve rod 4 to wear on the said valve gap 2, valve gap 2 is fixed in the open end of valve rod installation channel 12, an end of valve rod 4 and flap 3 interlocks; The other end and driving mechanism 6 interlocks; Bellows 5 is sheathed on the valve rod 4 and is positioned at valve rod installation channel 12, and an end of bellows 5 and valve gap 2 constitute fixed seal connection, the other end and valve rod 4 fixed seal connections.Wherein, Bellows 5 is made up of the dish-shaped ring plate 51 of a plurality of circles; The central authorities of this dish ring plate 51 offer and supply valve rod 4 to wear the dish-shaped ring plate through hole 511 of the circle of usefulness; The outer marginal circumference of this single dish-shaped ring plate 51 is an external diameter 512, and the inner edge circumference of said dish-shaped ring plate through hole 511 is an internal diameter 5111, and these single dish-shaped ring plate 51 top external diameters 512 lay respectively on the Different Plane with internal diameter 5111 place end faces; Internal diameter 5111 is positioned at the same side of external diameter 512 place end faces, and this external diameter 512 is arranged in parallel with internal diameter 5111 place end faces.The external diameter 512 of each dish-shaped ring plate 51 and external diameter 512 and internal diameter 5111 and staggered successively applying of internal diameter 5111 place end faces; And the center of circle of internal diameter 5111 all is located along the same line on each dish-shaped ring plate 51, and external diameter 512 welds with the Pervasion Weld Technology fixing seal that passes through to each other of external diameter 512 with internal diameter 5111 and internal diameter 5111.Wherein, Also be provided with the fixed base 52 of annular on the bellows 5; Fixed base 52 is provided with the fixed base through hole 521 that supplies valve rod to pass, and this fixed base 52 is fixedly connected on two open end of bellows 5 respectively, and bellows 5 is sheathed on the valve rod 4; A wherein fixed base 52 outer rims and 21 fixed seal connections of valve gap 2 upper valve rod mounting holes; And the isolation of formation valve rod installation channel 12 and valve gap 2 space outerpaces, another fixed base 52 upper fixed seat through holes 521 and valve rod 4 outer wall fixed seal connections, and the isolation of formation valve rod installation channel 12 and bellows 5 inner spaces.
Among the present invention, different with crest and trough on traditional bellows, 51 external diameters of each annular video disc 512 adopt the Pervasion Weld Technology fixing seal respectively with external diameter 512 and internal diameter 5111 and internal diameter 5111; Then when bellows 5 tensile bucklings; The crest of bellows 5 and trough position can not deform basically, are not easy to produce fatigue ruption thus, make that bellows 5 amount of deformation of the present invention are several times of traditional bellows of equal length yet; Structure is compact and reasonable more, and sealing effect is also more remarkable.Wherein, the length of bellows 5 can realize through the number that increases or reduce dish-shaped ring plate 51, is fit to very much installing of different length valve rod 4.Dish-shaped ring plate 51 top external diameters among the present invention and internal diameter place end face can be not parallel; As long as bellows structure can be realized passing of valve rod 4; And each dish-shaped ring plate 51 has certain axial compression space, then after each dish-shaped ring plate 51 as above-mentioned Diffusion Welding, all can realize the object of the invention.Wherein, the welding end is that face and face are adjacent to welding each other on each dish-shaped ring plate 51, does not have the situation appearance that crest is flattened and damages on traditional bellows of shaped by fluid pressure, so can bear the more valve of high pressure.Most preferably one of scheme of the present invention is the plane that is arranged in parallel for each dish-shaped ring plate 51 top external diameter 512 with internal diameter 5111 place end faces.In addition, fixed base 52 self is thicker, thereby has avoided because of some bellows 5 tube walls are thinner, is being welded problem appearance leakage fixedly the time with valve gap 2 or valve rod 4 welding.The present invention can also have other mode of executions, and the technological scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of requirement protection of the present invention.
Claims (3)
1. valve with sylphon seal; Include valve body and install valve gap, flap, valve rod, bellows and the driving mechanism on valve body, valve body be provided with valve pocket, with first fluid passage and second fluid passage and the space, conducting valve pocket inside and outside of conducting valve pocket respectively and the valve rod installation channel that supplies valve rod to install, flap is positioned between the first fluid passage and second fluid passage and constitutes the opening and closing of valve pocket; Offer the valve rod mounting hole that supplies valve rod to wear on the said valve gap; Valve gap is fixed in the open end of valve rod installation channel, an end of valve rod and flap interlock, the other end and driving mechanism interlock; Bellows is sheathed on the valve rod and is positioned at the valve rod installation channel; One end of bellows and valve gap constitute fixed seal connection, and the other end and valve rod fixed seal connection is characterized in that: said bellows is made up of a plurality of dish-shaped ring plates; This dish ring plate is provided with and supplies valve rod to wear the dish-shaped ring plate through hole of usefulness; The outer marginal circumference of this dish ring plate is an external diameter, and the inner edge circumference of said dish-shaped ring plate through hole is an internal diameter, and this dish ring plate top external diameter and internal diameter place end face lay respectively on the Different Plane; And internal diameter is positioned at the same side of external diameter place end face; The staggered successively fixed seal connection of the external diameter of each dish-shaped ring plate and external diameter and internal diameter and internal diameter, and the center of circle of internal diameter all is located along the same line on each dish-shaped ring plate, constitutes holistic bellows thus.
2. the valve of band sylphon seal according to claim 1; It is characterized in that: said dish-shaped ring plate is for circular; Dish ring plate through hole is circular and is opened in the central authorities of dish-shaped ring plate; Each dish-shaped ring plate top external diameter and internal diameter place end face are arranged in parallel, and external diameter and external diameter and internal diameter and internal diameter place end face is fitted each other and sealed welding between each adjacent dish-shaped ring plate.
3. the valve of band sylphon seal according to claim 2; It is characterized in that: the fixed base that also is provided with annular on the said bellows; Fixed base is provided with the fixed base through hole that supplies valve rod to pass, and this fixed base is fixedly connected on two open end of bellows respectively, and bellows is sheathed on the valve rod; A wherein fixed base outer rim and the fixed seal connection of valve gap upper valve rod mounting hole, another fixed base upper fixed seat through hole and the fixed seal connection of valve rod outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110090255A CN102155580B (en) | 2011-04-12 | 2011-04-12 | Valve with bellows seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110090255A CN102155580B (en) | 2011-04-12 | 2011-04-12 | Valve with bellows seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102155580A CN102155580A (en) | 2011-08-17 |
| CN102155580B true CN102155580B (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110090255A Active CN102155580B (en) | 2011-04-12 | 2011-04-12 | Valve with bellows seal |
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| CN (1) | CN102155580B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117174526B (en) * | 2023-11-03 | 2024-01-05 | 沈阳华德海泰电器有限公司 | Vacuum arc-extinguishing chamber with prolonged service life |
| CN117489291B (en) * | 2023-12-31 | 2024-04-05 | 大庆市天德忠石油科技有限公司 | Casing head with compression type sealing structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0247347A1 (en) * | 1986-04-18 | 1987-12-02 | Fujikin International, Inc. | Fluid flow control valve |
| CN1214428A (en) * | 1997-10-13 | 1999-04-21 | 赵文轩 | Leakless safety valve |
| CN2849357Y (en) * | 2005-09-19 | 2006-12-20 | 杨连成 | Zero leakage gate valve |
| CN1920357A (en) * | 2006-09-08 | 2007-02-28 | 陈世修 | Pneumatic gate valve |
| CN201034169Y (en) * | 2007-04-18 | 2008-03-12 | 费海鸿 | Full-metal corner valve |
| CN201705964U (en) * | 2010-08-16 | 2011-01-12 | 岳阳东方自控工程设备有限公司 | Coal flow adjusting angle valve |
| CN201973353U (en) * | 2011-04-12 | 2011-09-14 | 浙江超达阀门股份有限公司 | Valve with bellows seal |
-
2011
- 2011-04-12 CN CN201110090255A patent/CN102155580B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0247347A1 (en) * | 1986-04-18 | 1987-12-02 | Fujikin International, Inc. | Fluid flow control valve |
| CN1214428A (en) * | 1997-10-13 | 1999-04-21 | 赵文轩 | Leakless safety valve |
| CN2849357Y (en) * | 2005-09-19 | 2006-12-20 | 杨连成 | Zero leakage gate valve |
| CN1920357A (en) * | 2006-09-08 | 2007-02-28 | 陈世修 | Pneumatic gate valve |
| CN201034169Y (en) * | 2007-04-18 | 2008-03-12 | 费海鸿 | Full-metal corner valve |
| CN201705964U (en) * | 2010-08-16 | 2011-01-12 | 岳阳东方自控工程设备有限公司 | Coal flow adjusting angle valve |
| CN201973353U (en) * | 2011-04-12 | 2011-09-14 | 浙江超达阀门股份有限公司 | Valve with bellows seal |
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| Publication number | Publication date |
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| CN102155580A (en) | 2011-08-17 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
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Owner name: CHAODA VALVE GROUP CO., LTD. Free format text: FORMER NAME: ZHEJIANG CHAODA VALVE CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: Jiangbei Avenue Oubei town of Yongjia County of Wenzhou City, Zhejiang province 325000 Patentee after: Chaoda Valve Group Co., Ltd. Address before: Jiangbei Avenue Oubei town of Yongjia County of Wenzhou City, Zhejiang province 325000 Patentee before: Zhejiang Chaoda Valve Co., Ltd. |