CN109237122A - Single-seat adjusting valve with anti-corrosion function - Google Patents
Single-seat adjusting valve with anti-corrosion function Download PDFInfo
- Publication number
- CN109237122A CN109237122A CN201811201668.7A CN201811201668A CN109237122A CN 109237122 A CN109237122 A CN 109237122A CN 201811201668 A CN201811201668 A CN 201811201668A CN 109237122 A CN109237122 A CN 109237122A
- Authority
- CN
- China
- Prior art keywords
- valve rod
- bellows
- wall
- cyclic annular
- pressing plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 17
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 43
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 39
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 39
- 238000012856 packing Methods 0.000 claims abstract description 36
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 36
- 239000000945 filler Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 230000004323 axial length Effects 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 150000001336 alkenes Chemical class 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012946 outsourcing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- KOUNOBXGDXRSLR-UHFFFAOYSA-N 3-fluoropent-2-ene Chemical compound CCC(F)=CC KOUNOBXGDXRSLR-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses the single-seat adjusting valve with anti-corrosion function, including bellows-sheathed shell, shell of top cover, bellows-sheathed, bellows and upper cover core, upper cover in-core is equipped with airtight and watertight padding component, and airtight and watertight padding component passes sequentially through filler pressure pad and hold-down grid is fixed；Valve rod is contacted with airtight and watertight padding component and sylphon seal, and the mounting hole for accommodating airtight and watertight padding component is offered on upper cover core；Airtight and watertight padding component includes that polytetrafluoroethylene packing, buffer spring and cyclic annular pressing plate, polytetrafluoroethylene packing are set in outside valve rod, and the outer wall and inner wall of polytetrafluoroethylene packing respectively correspond in sealing contact with upper cover core inner wall of the hole installing and valve rod outer wall；The axial ends of polytetrafluoroethylene packing is equipped with buffer spring, and buffer spring is set on valve rod, and the free end of buffer spring is equipped with the cyclic annular pressing plate being set on valve rod.The present invention can effectively prevent filler and valve rod external wall friction to damage, and ensure valve rod corrosion resistance and regulating valve whole service life.
Description
Technical field
The present invention relates to valve technology fields, and in particular to a kind of single-seat adjusting valve with anti-corrosion function.
Background technique
Currently, corrosion resistant Fluorine-lined regulating valve mainly uses metal inner lining (or outsourcing) fluorine moulding material (mainly poly- complete
Fluoro ethyl propene, abbreviation F46 or FEP) to be isolated with strong corrosive media, to reach corrosion resistant purpose.Such as patent
The technology announced in CN92220634.3 is pumped and filler due to one layer of polyfluortetraethylene pipe of outsourcing on valve rod
It is easily damaged after friction, valve rod is caused to be corroded and cause valve invalidation.
Summary of the invention
The technical problems to be solved by the present invention are: in existing some single-seat adjusting valve structures, when using packing seal,
Filler and valve rod external wall friction are easy to damage, influence valve rod corrosion resistance and regulating valve whole service life, the present invention provides
The single-seat adjusting valve with anti-corrosion function to solve the above problems.
The present invention is achieved through the following technical solutions:
Single-seat adjusting valve with anti-corrosion function, it is described including the bellows-sheathed shell being bolted and shell of top cover
Ecto-entad is successively arranged with bellows-sheathed and bellows in bellows-sheathed shell；Be arranged with upper cover core in shell of top cover, it is described on
Airtight and watertight padding component is equipped in cover core, the airtight and watertight padding component passes sequentially through filler pressure pad and hold-down grid is fixed；Institute
It states valve rod and sequentially passes through bellows-sheathed shell and shell of top cover, and valve rod is contacted with airtight and watertight padding component and sylphon seal, it is described
The mounting hole for accommodating airtight and watertight padding component is offered on upper cover core；The airtight and watertight padding component includes polytetrafluoroethylene packing, delays
Spring and cyclic annular pressing plate are rushed, the polytetrafluoroethylene packing is set in outside valve rod, the outer wall and inner wall point of polytetrafluoroethylene packing
It Dui Ying not be in sealing contact with upper cover core inner wall of the hole installing and valve rod outer wall；The axial ends of polytetrafluoroethylene packing is equipped with buffering
Spring, buffer spring are set on valve rod, and the free end of buffer spring is equipped with the cyclic annular pressing plate being set on valve rod.
The present invention carries out double-layer seal by bellows and filler assembly, and sealing effect is good；It is carried out using filler assembly
Sealing principle is that polytetrafluoroethylene packing is set on valve rod outer wall, and the outer wall and inner wall of polytetrafluoroethylene packing respectively correspond
With upper cover core inner wall of the hole installing and valve rod outer wall is in sealing contact plays sealing function；Meanwhile the axial length of mounting hole is greater than poly-
The axial length of tetrafluoroethene filler, the axial ends of polytetrafluoroethylene packing are equipped with buffer spring, two buffer springs from
It is contacted by cyclic annular pressing plate with corresponding mounting hole bottom and upper cover core end face by holding, to increase contact area；In this way in valve
When relative friction resistance occurs for bar and polytetrafluoroethylene packing, frictional resistance, which is decomposed into, pushes away the axial direction of polytetrafluoroethylene packing
Dynamic deformation from motion and radial pressure, under the axial impetus power in part, the axis of very little can occur with valve rod for polytetrafluoroethylene packing
Acted on to displacement, this partial dislocation acts through the buffer spring of conversion to both ends, by the self-recovery active force of spring into
Row balance, can effectively prevent frictional resistance is excessive filler is caused to damage, influence valve rod service life.
Preferably, the inner wall of the hole installing clearance fit of cyclic annular the pressing plate lateral wall and upper cover core, the inside of cyclic annular pressing plate
The outer wall clearance fit of wall and valve rod.
The internal diameter of i.e. cyclic annular pressing plate is greater than the outer diameter of valve rod, and the outer diameter of cyclic annular pressing plate is less than the internal diameter of mounting hole, ring-type pressure
The equal clearance fit in outside in plate, with smaller frictional resistance；The sealing function of cyclic annular pressing plate polytetrafluoroethylene packing is avoided simultaneously.
Preferably, the mounting hole on the lower face of the cyclic annular pressing plate of polytetrafluoroethylene packing axial direction bottom end with upper cover core
Bottom face, which is equipped with, is mutually adapted the fixed magnechuck of absorption.
The cyclic annular pressing plate of polytetrafluoroethylene packing axial direction bottom end is connect by magnechuck with mounting hole bottom face, is conducive to
Stationary ring pressing plate plays the buffering Decentralized Friction drag effect of buffer spring to greatest extent；Also it is conducive to disassembling operations simultaneously.
Preferably, it is contacted after axial one end of the filler pressure pad is protruded into the mounting hole of cover core, with cyclic annular pressing plate, and
The card slot for accommodating cyclic annular pressing plate is also provided on the end face of the cyclic annular pressing plate of filler pressure pad direction.
By in the card slot on the cyclic annular pressing plate insertion filler pressure pad on polytetrafluoroethylene packing axial direction top, use process is prevented
In, cyclic annular pressing plate drives the service life of buffer spring radial deformation influence spring.
Preferably, it is less than after the ultimate tensile elongation of two buffer springs of the polytetrafluoroethylene packing axial ends
Filler pressure pad protrudes into the axial length in mounting hole.
Preferably, the axial top side wall of the bellows, which outwardly protrudes, is equipped with cyclic annular limit plate, the ring-type limit plate
It is pressed between the end of bellows-sheathed and the end of cover core；And if being convexly equipped on the upper face and lower face of cyclic annular limit plate
The positioning being adapted to the locating piece is equipped on the end face of dry locating piece, the bellows-sheathed and the cyclic annular limit plate of cover core direction
Slot.
Multiple locating pieces can be set in the plate face up and down of cyclic annular limit plate, the locating piece on upper face or lower face can be with wave
Line pipe is the center of circle, is radially distributed on bellows radial section, and the effect for preventing bellows from distorting is primarily served.
The present invention has the advantage that and the utility model has the advantages that
The present invention carries out double-layer seal by bellows and filler assembly, and sealing effect is good；It is carried out using filler assembly
Sealing principle is that polytetrafluoroethylene packing is set on valve rod outer wall, and the outer wall and inner wall of polytetrafluoroethylene packing respectively correspond
With upper cover core inner wall of the hole installing and valve rod outer wall is in sealing contact plays sealing function；Meanwhile the axial length of mounting hole is greater than poly-
The axial length of tetrafluoroethene filler, the axial ends of polytetrafluoroethylene packing are equipped with buffer spring, two buffer springs from
It is contacted by cyclic annular pressing plate with corresponding mounting hole bottom and upper cover core end face by holding, to increase contact area；In this way in valve
When relative friction resistance occurs for bar and polytetrafluoroethylene packing, frictional resistance, which is decomposed into, pushes away the axial direction of polytetrafluoroethylene packing
Dynamic deformation from motion and radial pressure, under the axial impetus power in part, the axis of very little can occur with valve rod for polytetrafluoroethylene packing
Acted on to displacement, this partial dislocation acts through the buffer spring of conversion to both ends, by the self-recovery active force of spring into
Row balance, can effectively prevent frictional resistance is excessive filler is caused to damage, influence valve rod service life.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is whole main view of the invention；
Fig. 2 is airtight and watertight padding component axial cross section structural schematic diagram of the invention；
Fig. 3 is 7- bellows overlooking structure diagram of the invention.
Label and corresponding parts title in attached drawing: 1- flange, 2- adapter tube core, 3- adapter tube shell, 4- valve body core, 5- valve
Seat, 6- shell, 7- bellows, 71- ring-type limit plate, 72- locating piece, 8- bellows-sheathed, 9- bellows-sheathed shell, 10- valve rod,
The upper cover core of 11-, 12- shell of top cover, 13- airtight and watertight padding component, 131- polytetrafluoroethylene packing, 132- buffer spring, 133- are cyclic annular
Pressing plate, 134- magnechuck, 135- card slot, 14- filler pressure pad, 15- hold-down grid.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
A kind of single-seat adjusting valve with anti-corrosion function is present embodiments provided, including the bellows-sheathed being bolted
Shell 9 and shell of top cover 12, ecto-entad is successively arranged with bellows-sheathed 8 and bellows 7 in bellows-sheathed shell 9；Shell of top cover 12
It is inside arranged with upper cover core 11, is equipped with airtight and watertight padding component 13 in upper cover core 11, airtight and watertight padding component 13 passes sequentially through filler pressure pad
14 and hold-down grid 15 be fixed；Valve rod 10 sequentially passes through bellows-sheathed shell 9 and shell of top cover 12, and valve rod 10 is filled out with sealing
Expect that component 13 and bellows 7 are in sealing contact, the mounting hole for accommodating airtight and watertight padding component 13 is offered on upper cover core 11.Airtight and watertight padding
Component 13 includes that polytetrafluoroethylene packing 131, buffer spring 132 and cyclic annular pressing plate 133, polytetrafluoroethylene packing 131 are set in
Outside valve rod 10, the outer wall and inner wall of polytetrafluoroethylene packing 131 respectively correspond with outside upper 11 inner wall of the hole installing of cover core and valve rod 10
Wall is in sealing contact；The axial ends of polytetrafluoroethylene packing 131 is equipped with buffer spring 132, and buffer spring 132 is set in valve rod
On 10, and the free end of buffer spring 132 is equipped with the cyclic annular pressing plate 133 being set on valve rod 10.
Embodiment 2
It is further improved on the basis of embodiment 1, between cyclic annular 133 lateral wall of pressing plate and the inner wall of the hole installing of upper cover core 11
Gap cooperation, the inner sidewall of cyclic annular pressing plate 133 and the outer wall clearance fit of valve rod 10.The axial bottom end of polytetrafluoroethylene packing 131
The mounting hole bottom face of the above cover core 11, which is equipped with, on the lower face of cyclic annular pressing plate 133 is mutually adapted the fixed magnechuck of absorption
134.Axial one end of filler pressure pad 14 is protruded into the mounting hole of cover core 11 and is contacted afterwards, with cyclic annular pressing plate 133, and filler pressure pad
The card slot 135 for accommodating cyclic annular pressing plate 133 is also provided on the end face of the cyclic annular pressing plate 133 of 14 directions.Polytetrafluoroethylene packing
It is less than the axis that filler pressure pad 14 protrudes into mounting hole after the ultimate tensile elongation of two buffer springs 132 of 131 axial endses
To length.
Embodiment 3
It is further improved on the basis of embodiment 2, the axial top side wall of bellows 7, which outwardly protrudes, is equipped with cyclic annular limit
Plate 71, cyclic annular limit plate 71 are pressed between the end of bellows-sheathed 8 and the end of cover core 11；And the upper plate of cyclic annular limit plate 71
Equal integration is convexly equipped with multiple locating pieces 72, bellows-sheathed 8 and cover core 11 towards the end of cyclic annular limit plate 71 on face and lower face
The locating slot being adapted to locating piece 72 is equipped on face.
Above specific embodiment has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Illustrate, it should be understood that the above is only a specific embodiment of the invention, the protection model that is not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (6)
1. the single-seat adjusting valve with anti-corrosion function, including the bellows-sheathed shell (9) and shell of top cover (12) being bolted,
The interior ecto-entad of the bellows-sheathed shell (9) is successively arranged with bellows-sheathed (8) and bellows (7)；Shell of top cover (12) inner sleeve
Equipped with upper cover core (11), airtight and watertight padding component (13) are equipped in the upper cover core (11), the airtight and watertight padding component (13) is successively
It is fixed by filler pressure pad (14) and hold-down grid (15)；The valve rod (10) sequentially pass through bellows-sheathed shell (9) and
Shell of top cover (12), and valve rod (10) and airtight and watertight padding component (13) and bellows (7) are in sealing contact, which is characterized in that on described
The mounting hole for accommodating airtight and watertight padding component (13) is offered on cover core (11)；The airtight and watertight padding component (13) includes polytetrafluoroethyl-ne
Alkene filler (131), buffer spring (132) and cyclic annular pressing plate (133), the polytetrafluoroethylene packing (131) are set in valve rod
(10) outside, the outer wall of polytetrafluoroethylene packing (131) and inner wall respectively correspond and upper cover core (11) inner wall of the hole installing and valve rod
(10) outer wall is in sealing contact；The axial ends of polytetrafluoroethylene packing (131) is equipped with buffer spring (132), buffer spring
(132) it is set on valve rod (10), and the free end of buffer spring (132) is equipped with the cyclic annular pressing plate being set on valve rod (10)
(133)。
2. the single-seat adjusting valve according to claim 1 with anti-corrosion function, which is characterized in that the ring-type pressing plate
(133) the inner wall of the hole installing clearance fit of lateral wall and upper cover core (11), inner sidewall and valve rod (10) of cyclic annular pressing plate (133)
Outer wall clearance fit.
3. the single-seat adjusting valve according to claim 1 with anti-corrosion function, which is characterized in that the polytetrafluoroethylene (PTFE) is filled out
It is mutual to expect that the mounting hole bottom face of the above cover core (11) on the lower face of the cyclic annular pressing plate (133) of (131) axial bottom end is equipped with
The fixed magnechuck (134) of adaptation absorption.
4. the single-seat adjusting valve according to claim 1 with anti-corrosion function, which is characterized in that the filler pressure pad (14)
Axial one end protrude into the mounting hole of cover core (11) after, contact with ring-type pressing plate (133), and filler pressure pad (14) is towards ring
The card slot (135) for accommodating cyclic annular pressing plate (133) is also provided on the end face of shape pressing plate (133).
5. the single-seat adjusting valve according to claim 4 with anti-corrosion function, which is characterized in that the polytetrafluoroethylene (PTFE) is filled out
It is less than filler pressure pad (14) after the ultimate tensile elongation of two buffer springs (132) of material (131) axial ends and protrudes into installation
Axial length in hole.
6. the single-seat adjusting valve according to claim 1 with anti-corrosion function, which is characterized in that the bellows (7)
Axial top side wall, which outwardly protrudes, is equipped with cyclic annular limit plate (71), and the ring-type limit plate (71) is pressed on bellows-sheathed (8)
Between end and the end of cover core (11)；And several locating pieces are convexly equipped on the upper face and lower face of cyclic annular limit plate (71)
(72), it is equipped with and the locating piece on the end face of the bellows-sheathed (8) and the cyclic annular limit plate (71) of cover core (11) direction
(72) locating slot being adapted to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811201668.7A CN109237122A (en) | 2018-10-16 | 2018-10-16 | Single-seat adjusting valve with anti-corrosion function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811201668.7A CN109237122A (en) | 2018-10-16 | 2018-10-16 | Single-seat adjusting valve with anti-corrosion function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109237122A true CN109237122A (en) | 2019-01-18 |
Family
ID=65053579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811201668.7A Pending CN109237122A (en) | 2018-10-16 | 2018-10-16 | Single-seat adjusting valve with anti-corrosion function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109237122A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202252316U (en) * | 2011-10-15 | 2012-05-30 | 江苏神通阀门股份有限公司 | Sealing structure for valve rod |
| CN203963231U (en) * | 2014-06-23 | 2014-11-26 | 大连派力斯特控制阀门制造有限公司 | A kind of PSCW sylphon seal single-seat adjusting valve |
| CN204226680U (en) * | 2014-11-18 | 2015-03-25 | 欧文凯利自控阀（上海）有限公司 | Stuffing hole place strengthens the anti-electric butterfly valve leaked outside |
| CN107061857A (en) * | 2017-02-24 | 2017-08-18 | 江苏金晟元特种阀门股份有限公司 | Electronic Fluorine-lined bellows single-seat adjusting valve |
| CN207621387U (en) * | 2017-12-25 | 2018-07-17 | 重庆新华林自控仪表有限公司 | Novel fluoroplastics corrugated tube sealing structure |
-
2018
- 2018-10-16 CN CN201811201668.7A patent/CN109237122A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202252316U (en) * | 2011-10-15 | 2012-05-30 | 江苏神通阀门股份有限公司 | Sealing structure for valve rod |
| CN203963231U (en) * | 2014-06-23 | 2014-11-26 | 大连派力斯特控制阀门制造有限公司 | A kind of PSCW sylphon seal single-seat adjusting valve |
| CN204226680U (en) * | 2014-11-18 | 2015-03-25 | 欧文凯利自控阀（上海）有限公司 | Stuffing hole place strengthens the anti-electric butterfly valve leaked outside |
| CN107061857A (en) * | 2017-02-24 | 2017-08-18 | 江苏金晟元特种阀门股份有限公司 | Electronic Fluorine-lined bellows single-seat adjusting valve |
| CN207621387U (en) * | 2017-12-25 | 2018-07-17 | 重庆新华林自控仪表有限公司 | Novel fluoroplastics corrugated tube sealing structure |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190118 |
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| RJ01 | Rejection of invention patent application after publication |