CN104712841A - Sealing device for valve shaft of high-temperature butterfly valve - Google Patents
Sealing device for valve shaft of high-temperature butterfly valve Download PDFInfo
- Publication number
- CN104712841A CN104712841A CN201510147367.0A CN201510147367A CN104712841A CN 104712841 A CN104712841 A CN 104712841A CN 201510147367 A CN201510147367 A CN 201510147367A CN 104712841 A CN104712841 A CN 104712841A
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- CN
- China
- Prior art keywords
- valve shaft
- valve
- filler
- boss
- gland
- 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.)
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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
- F16K41/023—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles
Abstract
The invention relates to a sealing device for a valve shaft of a high-temperature butterfly valve. The sealing device comprises a valve shaft, a packing box, a composite sealing body, packing and a packing pressing cover, wherein the valve shaft is provided with an annular sealing lug boss; the packing box is arranged on the outer side of the valve shaft; the packing box is internally and sequentially provided with the composite sealing body, the packing and the packing pressing cover which are tightly connected from the direction close to the lug boss to the direction far away from the lug boss; and the packing pressing cover is fixed on the packing box, and the packing is pressed. The lug boss is in end face sealing with the composite sealing body, a gap with the size of 5cm or more than 5cm is formed between the lug boss and the packing box, and a gap with the size of 5cm or more than 5cm is formed between a pressing sleeve and the valve shaft. The composite sealing body can be finely adjusted when the valve shaft is deformed, even bent at a high temperature, so that the valve shaft is still tightly combined with the composite sealing body and the pressing sleeve, and the friction force is not changed. The sealing device is provided with a blowing opening 4, and an external wind force is introduced from the blowing opening to blow away a medium between the valve shaft and the sealing device, so that the sealing device is prevented from being blocked.
Description
Technical field
A kind of high temperature butterfly valve valve shaft seal, particularly high temperature butterfly valve valve shaft seal in petrochemical equipment.
Background technique
Refer to Fig. 1 and Fig. 2, it is cut-away view and the A-A sectional drawing thereof of Present Domestic high temperature butterfly valve valve shaft and seal arrangement thereof.As seen from the figure, the valve shaft seal of this high temperature butterfly valve comprises Stuffing box 3, filler 4, gland 7 and the first neutral gear, utilize the first neutral gear 71 that gland is fixed, gland 7 is compressed filler 4 and makes it closely be filled in the gap between valve shaft and Stuffing box 3, realize radial seal.At this moment valve shaft will have certain frictional force when rotating and between filler, and when valve shaft, at high temperature to produce deformation even bending, and between valve shaft sealing place and bearing, concentricity can not ensure, frictional force strengthens, and opens difficulty, even stuck, causes butterfly valve to use.Moreover the medium of circulation in flue slowly can corrode filler under the effect of the pressure and clog the gap between valve shaft and filler, causes valve shaft stuck, makes butterfly valve use.
Because the defect that above-mentioned existing high temperature butterfly valve valve shaft seal exists, the present inventor is based on being engaged in the practical experience and professional knowledge that this type of product specification manufacture enriches for many years, and coordinate the utilization of scientific principle, actively in addition research and innovation, to founding a kind of high temperature butterfly valve valve shaft seal of new structure, general existing high temperature butterfly valve valve shaft seal can be improved, make it have more practicability.Through constantly research, design, and through repeatedly studying sample and after improving, finally creating the present invention had practical value.
Summary of the invention
The object of the invention is to, overcome the defect that existing high temperature butterfly valve valve shaft seal exists, and a kind of valve shaft seal of high temperature valve shaft of new structure is provided, technical problem to be solved makes it realize end face seal by the boss on valve shaft and compound seal body, make cap sealing still can realize sealing effect when axle high temperature deformation, and set out and sweep mouth to pass into the medium between gas clean-up axle and seal arrangement, in case be blocking, thus be more suitable for practicality.
The object of the invention to solve the technical problems adopts following technological scheme to realize.According to a kind of high temperature butterfly valve valve shaft seal that the present invention proposes, comprise valve shaft, Stuffing box, compound seal body, filler and Gland, with ring packing boss on described valve shaft; Described Stuffing box is located at outside valve shaft, in Stuffing box, by adjacent boss to the direction away from boss, set gradually the compound seal body of close proximity, filler and Gland, wherein Gland is pressed on filler, filler is pressed on compound seal body, and compound seal body is pressed on the end face of boss.
Object of the present invention and solve its technical problem and can also be further achieved by the following technical measures.
Aforesaid valve shaft seal, wherein more comprises blow valve port.
Aforesaid valve shaft seal, wherein said blow valve port is located on Stuffing box, is positioned at outside boss and the position of adjacent compound seal body.
Aforesaid valve shaft seal, wherein more comprises clamping sleeve, and this clamping sleeve is enclosed within valve shaft, and its section is inverted L-shaped, and its one end is radially pressed between compound seal body and filler, and its one end is vertically located between filler and valve shaft.
Aforesaid valve shaft seal, wherein said clamping sleeve has gap along between one end end face and Gland of valve shaft axis.
Aforesaid valve shaft seal, has the gap being not less than 5 millimeters between wherein said clamping sleeve and valve shaft.
Aforesaid a kind of high temperature butterfly valve valve shaft seal, has the gap being not less than 5 millimeters between the external diameter of wherein said boss and the interior warp of described Stuffing box.
Aforesaid valve shaft seal, is characterized in that, wherein said Gland is fixed on Stuffing box.
Aforesaid valve shaft seal, wherein said Gland has gap away between one end of filler and valve shaft.
The present invention compared with prior art has obvious advantage and beneficial effect.By technique scheme, a kind of high temperature butterfly valve of the present invention valve shaft seal can reach suitable technological progress and practicability, and has the extensive value in industry, and it at least has following advantages:
Valve shaft realizes section with ring packing boss and compound seal body and seals, and has the gap of more than 5 millimeters or 5 millimeters, have the gap of more than 5 millimeters or 5 millimeters between clamping sleeve and valve shaft between boss and Stuffing box.Valve shaft at high temperature produces compound seal body when deformation even bends can make fine setting, make valve shaft and still combine closely between compound seal body and clamping sleeve, and frictional force is constant.Also add out and sweep mouth, blow valve port passes into external wind and the medium between valve shaft and seal arrangement can be blown off, and prevents blocking.
Accompanying drawing explanation
Fig. 1 is existing high temperature butterfly valve valve shaft sealing device cut-away view;
Fig. 2 is the A-A sectional drawing of Fig. 1;
Fig. 3 is high temperature butterfly valve valve shaft sealing device cut-away view of the present invention;
Fig. 4 is the B-B sectional drawing of Fig. 3.
[primary component symbol description]
1: valve shaft
11: boss
2: valve body
3: Stuffing box
31: blow valve port
4: filler
5: compound seal body
6: clamping sleeve
7: Gland
8: supporting sleeve
9: bearing
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to a kind of its embodiment of high temperature butterfly valve valve shaft seal proposed according to the present invention, structure, feature and effect thereof, be described in detail as follows.
Refer to Fig. 3 and Fig. 4, it is cut-away view and the B-B sectional drawing thereof of a kind of high temperature butterfly valve valve of embodiment of the present invention shaft seal.As seen from the figure, a kind of high temperature butterfly valve valve shaft sealing device of the embodiment of the present invention, comprises valve shaft 1, Stuffing box 3, compound seal body 5, filler 4, clamping sleeve 6, Gland 7.
Wherein valve shaft 1 is with ring packing boss 11, and Stuffing box 3 is located at the outside of valve shaft 1, has the gap of more than 5 millimeters or 5 millimeters between the external diameter of the internal diameter of Stuffing box 3 and the boss 11 of valve shaft 1.
In Stuffing box 3, by adjacent boss to away from boss, be provided with compound seal body 5, clamping sleeve 6, filler 4 and Gland 7 successively.
Compound seal body 5 is pressed on boss, realizes end face seal with boss.The filler 4 that adjacent compound seal body 5 is arranged is pressed on compound seal body 5 by Gland 7.Gland 7 one end is pressed on filler 4, and the other end is fixed on Stuffing box.
In order to prevent filler from spilling from valve shaft side when being squeezed, the embodiment of the present invention is also provided with clamping sleeve 6.The section of clamping sleeve 6 is inverted L-shaped, and its one end along valve shaft 1 radial direction is pressed between compound seal body 5 and filler 4, and end face is concordant with the end face of compound seal body 5; Its one end along valve shaft 1 axis between valve shaft 1 and filler 4, and and there is between valve shaft 1 gap of more than 5 millimeters or 5 millimeters, and also have certain interval between the end face in this direction and Gland.
For the ease of installing described seal arrangement, valve shaft outboard structure is divided into Stuffing box and supporting sleeve, is bolted between Stuffing box and supporting sleeve.Gland 7 is positioned at inside supporting sleeve near Stuffing box and supporting sleeve joint away from one end of boss, its end face is vertically oval, supporting sleeve is stretched out through the mouth that supporting sleeve is outputed in the two ends of the major axis of this ellipse, and the two ends of stretching out supporting sleeve have bolt hole, utilize bolt that this gland is fixed on Stuffing box, Gland 7 is pressed on filler 4, makes the tight space of filling in clamping sleeve 6 and Stuffing box 3 of filler 4.
Due between the clamping sleeve 6 described in the embodiment of the present invention and valve shaft 1, between boss 11 and Stuffing box 3, all there is the gap of more than 5 millimeters or 5 millimeters, valve shaft 1 at high temperature produces compound seal body 5 when deformation even bends can make fine setting, make valve shaft 1 and still combine closely between compound seal body 5 and clamping sleeve 6, and frictional force is constant.
The embodiment of the present invention, on Stuffing box 3, outside boss 11, the position of adjacent compound seal body 5, is also provided with blow valve port 31.Ventilate in the gap between Stuffing box and valve shaft by blow valve port 31, the medium in seal arrangement is blown off, to keep the gap of valve shaft and sealing means, prevent valve shaft from blocking.
High temperature butterfly valve valve shaft seal of the present invention also can be used for the sealing of high temperature baffle plate valve shaft.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (9)
1. a high temperature butterfly valve valve shaft seal, comprises valve shaft, Stuffing box, compound seal body, filler and Gland, it is characterized in that:
With ring packing boss on described valve shaft;
Described Stuffing box is located at outside valve shaft, in Stuffing box, by adjacent boss to the direction away from boss, set gradually the compound seal body of close proximity, filler and Gland, wherein Gland is pressed on filler, filler is pressed on compound seal body, and compound seal body is pressed on the end face of boss.
2. valve shaft seal according to claim 1, is characterized in that, wherein more comprise blow valve port.
3. valve shaft seal according to claim 2, is characterized in that, wherein said blow valve port is located on Stuffing box, is positioned at outside boss and the position of adjacent compound seal body.
4. valve shaft seal according to claim 1 and 2, is characterized in that, wherein more comprise clamping sleeve, this clamping sleeve is enclosed within valve shaft, its section is inverted L-shaped, and its one end is radially pressed between compound seal body and filler, and its one end is vertically located between filler and valve shaft.
5. valve shaft seal according to claim 4, is characterized in that, wherein said clamping sleeve has gap along between one end end face and Gland of valve shaft axis.
6. valve shaft seal according to claim 4, is characterized in that, has the gap being not less than 5 millimeters between wherein said clamping sleeve and valve shaft.
7. a kind of high temperature butterfly valve valve shaft seal according to claim 1, is characterized in that having the gap being not less than 5 millimeters between the external diameter of wherein said boss and the interior warp of described Stuffing box.
8. valve shaft seal according to claim 1, is characterized in that, wherein said Gland is fixed on Stuffing box.
9. valve shaft seal according to claim 1, is characterized in that, wherein said Gland has gap away between one end of filler and valve shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510147367.0A CN104712841A (en) | 2015-03-31 | 2015-03-31 | Sealing device for valve shaft of high-temperature butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510147367.0A CN104712841A (en) | 2015-03-31 | 2015-03-31 | Sealing device for valve shaft of high-temperature butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104712841A true CN104712841A (en) | 2015-06-17 |
Family
ID=53412426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510147367.0A Pending CN104712841A (en) | 2015-03-31 | 2015-03-31 | Sealing device for valve shaft of high-temperature butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104712841A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014179A (en) * | 2019-12-13 | 2020-04-17 | 济南大学 | Prevent that self-blowing of butterfly valve jam from sweeping structure and including butterfly valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1211683A (en) * | 1966-10-27 | 1970-11-11 | Triangle Valve Company Ltd | Improvements in valves for controlling fluid flow |
| US5531244A (en) * | 1995-07-25 | 1996-07-02 | Conval, Inc. | Hemispherical ball valve |
| US20100038574A1 (en) * | 2008-08-14 | 2010-02-18 | Tun Yi Industrial Co., Ltd. | Valve assembly |
| CN201902681U (en) * | 2010-12-24 | 2011-07-20 | 秦皇岛秦冶重工有限公司 | Valve packing seal device |
| CN202484343U (en) * | 2012-01-14 | 2012-10-10 | 重庆海王仪器仪表有限公司 | Anti-blowout device of valve rod of cam flexure regulating valve |
| CN204533789U (en) * | 2015-03-31 | 2015-08-05 | 洛阳兴罡石化设备有限公司 | A kind of high temperature butterfly valve valve shaft seal |
-
2015
- 2015-03-31 CN CN201510147367.0A patent/CN104712841A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1211683A (en) * | 1966-10-27 | 1970-11-11 | Triangle Valve Company Ltd | Improvements in valves for controlling fluid flow |
| US5531244A (en) * | 1995-07-25 | 1996-07-02 | Conval, Inc. | Hemispherical ball valve |
| US20100038574A1 (en) * | 2008-08-14 | 2010-02-18 | Tun Yi Industrial Co., Ltd. | Valve assembly |
| CN201902681U (en) * | 2010-12-24 | 2011-07-20 | 秦皇岛秦冶重工有限公司 | Valve packing seal device |
| CN202484343U (en) * | 2012-01-14 | 2012-10-10 | 重庆海王仪器仪表有限公司 | Anti-blowout device of valve rod of cam flexure regulating valve |
| CN204533789U (en) * | 2015-03-31 | 2015-08-05 | 洛阳兴罡石化设备有限公司 | A kind of high temperature butterfly valve valve shaft seal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014179A (en) * | 2019-12-13 | 2020-04-17 | 济南大学 | Prevent that self-blowing of butterfly valve jam from sweeping structure and including butterfly valve |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150617 |