CN110260034A - A kind of big butterfly spring floating preload valve stem packing sealing device of band - Google Patents
A kind of big butterfly spring floating preload valve stem packing sealing device of band Download PDFInfo
- Publication number
- CN110260034A CN110260034A CN201810201131.4A CN201810201131A CN110260034A CN 110260034 A CN110260034 A CN 110260034A CN 201810201131 A CN201810201131 A CN 201810201131A CN 110260034 A CN110260034 A CN 110260034A
- Authority
- CN
- China
- Prior art keywords
- butterfly spring
- valve stem
- band
- stuffing
- sealing device
- 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
- 238000012856 packing Methods 0.000 title claims abstract description 37
- 238000007789 sealing Methods 0.000 title claims abstract description 27
- 238000007667 floating Methods 0.000 title abstract description 6
- 230000036316 preload Effects 0.000 title abstract description 6
- 239000000945 filler Substances 0.000 claims abstract description 19
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The application belongs to valve technology field, and in particular to a kind of big butterfly spring floating preload valve stem packing sealing device of band.A kind of big butterfly spring floating preload valve stem packing sealing device of band, including the stuffing-box being socketed in outside valve rod, the shape of stuffing-box is similar to funnel, in the inside of stuffing-box, filling space is set between valve rod, filler, Packing seat and butterfly spring are followed successively by filling space from the bottom to top, pressing sleeve is set above stuffing-box, which is sealed in filler, Packing seat and butterfly spring in the filling space between stuffing-box and valve rod.The remarkable result of the application is: due to being directly provided with a big butterfly spring between pressing sleeve and filler, so that under long-time service or temperature alternating operating condition when filler relaxation, the precompressed butterfly spring can compensate filler relaxation automatically, to ensure that the reliable of valve stem packing sealing.
Description
Technical field
The application belongs to valve technology field, and in particular to a kind of big butterfly spring floating preload valve stem packing sealing device of band.
Background technique
The valve rod of valve is one of important part of valve, and the sealing effect to valve rod is the important finger for determining valve quality
One of mark.Existing valve stem seal typically says that stuffing seal is socketed on valve rod, such as rubber seal, this
Although mode structure is simple, easy-to-use, in the long-term use or under temperature alternating operating condition, filler is often loose
It relaxes, is leaked so as to cause at valve stem packing sealing.
Summary of the invention
The purpose of the application is to provide a kind of valve stem packing sealing structure, which can compensate long-time service and temperature alternating
Caused relaxation, it is ensured that valve stem packing sealing performance.
The technical solution of the application is: a kind of big butterfly spring floating preload valve stem packing sealing device of band, including is socketed in valve
Filling space, filler is arranged in the inside of stuffing-box similar to funnel in the shape of stuffing-box outside bar, stuffing-box between valve rod
Filler, Packing seat and butterfly spring are followed successively by space from the bottom to top, pressing sleeve is set above stuffing-box, the pressing sleeve is by filler, filler
Pad and butterfly spring are sealed in the filling space between stuffing-box and valve rod.
A kind of big butterfly spring of band as described above, which is floated, pre-tightens valve stem packing sealing device, wherein pressing sleeve lower part stretches out one
Convex shoulder having a size of A.
A kind of big butterfly spring of band as described above, which is floated, pre-tightens valve stem packing sealing device, wherein the size of the convex shoulder
A is greater than butterfly spring thickness.
A kind of big butterfly spring of band as described above, which is floated, pre-tightens valve stem packing sealing device, wherein pressing sleeve bottom end and Packing seat
Between be arranged gap B.
A kind of big butterfly spring of band as described above, which is floated, pre-tightens valve stem packing sealing device, wherein the range of the size B
It is the 75%~95% of butterfly spring free height.
A kind of big butterfly spring of band as described above, which is floated, pre-tightens valve stem packing sealing device, wherein the outer diameter of the butterfly spring
Clearance C is set between stuffing-box aperture.
The big butterfly spring of a kind of band as described above, which is floated, pre-tightens valve stem packing sealing device, wherein the clearance C is
0.5-1mm.
The remarkable result of the application is: due to being directly provided with a big butterfly spring between pressing sleeve and filler, so that in length
Under phase use or temperature alternating operating condition when filler relaxation, which can compensate filler relaxation automatically, to guarantee
Valve stem packing sealing it is reliable.
Detailed description of the invention
The big butterfly spring of Fig. 1 band, which is floated, pre-tightens valve stem packing sealing structure.
In figure: 1 valve rod；2 stuffing-boxes；3 fillers；4 Packing seats；5 butterfly springs；6 pressing sleeves.
Specific embodiment
The application is described further with reference to the accompanying drawing:
As shown in the picture, a kind of big butterfly spring of band, which is floated, pre-tightens valve stem packing sealing structure, is arranged in pressing sleeve lower part one big
Butterfly spring；One Packing seat made of metal is set above filler；A convex shoulder having a size of A, A are stretched out in pressing sleeve lower part
Greater than butterfly spring thickness, so that butterfly spring is installed on the convex shoulder outer rim and does not fall out convex shoulder；Between pressing sleeve bottom end and Packing seat
Gap B is the decrement of butterfly spring, and size B is the 75%~95% of butterfly spring free height, and butterfly spring is made to have enough decrements
Butterfly spring will not be flattened simultaneously；The outer diameter of big butterfly spring and the clearance C in stuffing-box aperture are 0.5-1mm, to prevent butterfly spring compressed
Stuffing-box inner hole is damaged in journey.
It realizes that technical characterstic of the invention has: a big butterfly spring is set between pressing sleeve lower part and filler, and pressing sleeve lower part is stretched
A convex shoulder having a size of A out, A is greater than butterfly spring thickness, so that butterfly spring is installed on the convex shoulder outer rim and does not fall out convex shoulder；Pressure
It is the 75% of butterfly spring free height that design, which has gap B, size B, between set bottom end and Packing seat, and butterfly spring is made to have enough decrements
While will not flatten butterfly spring；The outer diameter of big butterfly spring and the clearance C in stuffing-box aperture are 0.5-1mm, to prevent butterfly spring from compressing
Stuffing-box inner hole is damaged in the process.
Claims (7)
1. a kind of big butterfly spring of band, which is floated, pre-tightens valve stem packing sealing device, it is characterised in that: including being socketed in valve rod (1) filling out outside
To expect letter (2), filling space is arranged between the inside of stuffing-box (2), with valve rod (1) similar to funnel in the shape of stuffing-box (2),
Filler (3), Packing seat (4) and butterfly spring (5) are followed successively by filling space from the bottom to top, pressing sleeve is set above stuffing-box (2)
(6), which is sealed in the sky of the filler between stuffing-box (2) and valve rod (1) for filler (3), Packing seat (4) and butterfly spring (5)
Between in.
2. a kind of big butterfly spring of band as described in claim 1, which is floated, pre-tightens valve stem packing sealing device, it is characterised in that: pressing sleeve
(6) convex shoulder having a size of A is stretched out in lower part.
3. a kind of big butterfly spring of band as claimed in claim 2, which is floated, pre-tightens valve stem packing sealing device, it is characterised in that: described
The size A of convex shoulder is greater than butterfly spring thickness.
4. a kind of big butterfly spring of band as claimed in claim 2, which is floated, pre-tightens valve stem packing sealing device, it is characterised in that: pressing sleeve bottom
Gap B is set between end and Packing seat.
5. a kind of big butterfly spring of band as claimed in claim 4, which is floated, pre-tightens valve stem packing sealing device, it is characterised in that: described
The range of size B is the 75%~95% of butterfly spring free height.
6. a kind of big butterfly spring of band as claimed in claim 2, which is floated, pre-tightens valve stem packing sealing device, it is characterised in that: described
Clearance C is set between the outer diameter and stuffing-box aperture of butterfly spring (5).
7. a kind of big butterfly spring of band as claimed in claim 6, which is floated, pre-tightens valve stem packing sealing device, it is characterised in that: described
Clearance C is 0.5-1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810201131.4A CN110260034A (en) | 2018-03-12 | 2018-03-12 | A kind of big butterfly spring floating preload valve stem packing sealing device of band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810201131.4A CN110260034A (en) | 2018-03-12 | 2018-03-12 | A kind of big butterfly spring floating preload valve stem packing sealing device of band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110260034A true CN110260034A (en) | 2019-09-20 |
Family
ID=67911461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810201131.4A Pending CN110260034A (en) | 2018-03-12 | 2018-03-12 | A kind of big butterfly spring floating preload valve stem packing sealing device of band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110260034A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1046508A (en) * | 1963-09-18 | 1966-10-26 | Crane Ltd | Improved stuffing box mounting |
| GB2103310A (en) * | 1981-07-31 | 1983-02-16 | Smith International | Seal |
| CN201330887Y (en) * | 2009-01-09 | 2009-10-21 | 上海一核阀门制造有限公司 | Filler sealing structure of small-diameter valve |
| CN201373167Y (en) * | 2009-02-12 | 2009-12-30 | 王奕彤 | Low temperature ball valve |
| CN208252924U (en) * | 2018-03-12 | 2018-12-18 | 中核苏阀科技实业股份有限公司 | A kind of big butterfly spring floating preload valve stem packing sealing device of band |
-
2018
- 2018-03-12 CN CN201810201131.4A patent/CN110260034A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1046508A (en) * | 1963-09-18 | 1966-10-26 | Crane Ltd | Improved stuffing box mounting |
| GB2103310A (en) * | 1981-07-31 | 1983-02-16 | Smith International | Seal |
| CN201330887Y (en) * | 2009-01-09 | 2009-10-21 | 上海一核阀门制造有限公司 | Filler sealing structure of small-diameter valve |
| CN201373167Y (en) * | 2009-02-12 | 2009-12-30 | 王奕彤 | Low temperature ball valve |
| CN208252924U (en) * | 2018-03-12 | 2018-12-18 | 中核苏阀科技实业股份有限公司 | A kind of big butterfly spring floating preload valve stem packing sealing device of band |
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