CN104265992A - Sealing structure of gate valve stuffing box - Google Patents
Sealing structure of gate valve stuffing box Download PDFInfo
- Publication number
- CN104265992A CN104265992A CN201410512328.1A CN201410512328A CN104265992A CN 104265992 A CN104265992 A CN 104265992A CN 201410512328 A CN201410512328 A CN 201410512328A CN 104265992 A CN104265992 A CN 104265992A
- Authority
- CN
- China
- Prior art keywords
- stuffing box
- gland
- stuffing
- valve
- filler
- 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
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
- F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
The invention relates to a sealing structure of a gate valve stuffing box. The sealing structure comprises a valve deck, wherein a gland is arranged on the valve deck, the stuffing box is arranged in the valve deck, and stuffing is filled in the stuffing box. A protrusion for pressing the stuffing is arranged on the gland, a valve rod is located in the valve deck and penetrates through the stuffing and the gland, the vertical section of the stuffing box is conical, and the end surface of the stuffing box close to the gland is larger than the end surface of the stuffing box far away from the gland. When the gland presses the stuffing, as the vertical section of the stuffing box is conical, the stuffing bears not only downward pressure but also radial extruding force under the effect of the conical stuffing box, so that the stuffing tightly contacts the valve rod, a good sealing effect is achieved, and accordingly leakage of media through the stuffing box is avoided.
Description
Technical field
The present invention relates to a kind of sealing configuration of valve, be specifically related to a kind of stuffing box for gate valve sealing configuration.
Background technique
Along with the develop rapidly of science and technology and improving constantly of petroleum industry level, more and more higher to the sealing requirements of valve.Valve, once leak, will cause serious consequence.The leakage of valve have interior leakage and leak outside point.Interior leakage betides on the sealing pair of valve seat and closure member, leaks outside, and occurs on the sealing pair of valve stem seal and adpting flange.Cause external leakage because have, 1, packing seal only pressured lid axial force is applied to it, then produce radial direction compressive deformation sealing valve rod, prevent medium from leaking.2, filler shape is rectangle, analyzes from actual service condition, and anti-extrusion, wear-resistant ability of rectangular filler restricts mutually, and sealing effect is poor.3, filler generally adopts asbestos yarn braiding or expanded graphite to manufacture, and have good self lubricity and thermal conductivity, friction factor is little, but elasticity is poor, and wearing and tearing post-compensation poor-performing, sealing effect is not ideal enough.4, valve gap stuffing box inner chamber adopts cylindrical, and can not ensure to be installed in Seal cage by filler abreast, filler is skewness around valve rod, and be easily squeezed generation eccentric wear, reduces the working life of filler.
Summary of the invention
The object of the present invention is to provide a kind of stuffing box for gate valve sealing configuration, improve existing sealing configuration, enable filler sealed valve stem better, prevent medium from leaking.
For achieving the above object, technological scheme of the present invention is: stuffing box for gate valve sealing configuration, comprise valve gap, described valve gap is provided with gland, is provided with stuffing box in described valve gap, filler is provided with in described stuffing box, described gland is provided with the projection compressing filler, and valve rod is arranged in valve gap, and valve rod is through filler and gland, the vertical cross-section of described stuffing box is tapered, and stuffing box is greater than the end face away from gland near the end face of gland.
When adopting technique scheme, when gland compresses filler, because the vertical cross-section of stuffing box is tapered, filler is not only subject to downward pressure, also because of the effect of taper stuffing box, be subject to the power of lateral extrusion, make filler and valve rod close contact, play good seal action, thus stop medium to be leaked by stuffing box.
Further, described stuffing box along valve rod axially twist.Spirality can increase filler and valve rod close contact degree better, improves the performance of sealing.
Further, described filler is made up of oil resistant rubber, bearing bed and infantees.Oil resistant rubber makes filler softness, has elasticity, increases compression rebound rate.Bearing bed has higher intensity and good saturating machine, the oiling agent lost in timely additional fillers.Infantees is compounded to form folder cloth oil resistant rubber together with oil resistant rubber, has higher wear resistance and intensity.
Further, described gland and valve gap are bolted.With bolts being convenient to is dismantled and is changed filler.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the structural representation of stuffing box for gate valve sealing configuration embodiment of the present invention.
Embodiment
As shown in Figure 1, stuffing box for gate valve sealing configuration of the present invention, comprises valve gap 1, and valve gap 1 is provided with gland 2, is provided with stuffing box 4 in valve gap 1, is provided with filler 3 in stuffing box 4, and gland 2 is provided with the lug boss compressing filler 3.Valve rod 5 is arranged in valve gap 1, and valve rod 5 is through filler 3 and gland 2, and the vertical cross-section of stuffing box 4 is tapered, and stuffing box 4 is greater than the end face away from gland 2 near the end face of gland 2.Stuffing box 4 is designed to the structure with tapering.When gland 2 compresses filler, filler 3 is not only subject to downward pressure, also because of the effect of taper stuffing box 4, is subject to the power of lateral extrusion, makes filler 3 and valve rod 5 close contact, plays good seal action, thus stops medium to be leaked by stuffing box 4.
Filler 3 is made up of oil resistant rubber, bearing bed and infantees.When gland 2 compresses filler 3, airtight and watertight padding 3 axis and radial direction are deformed, is close to valve rod 5 and Seal cage inner wall surface.Filler 3 spiral winding and Seal cage inwall has certain tapering, therefore only needs a less axial pressing force can produce larger sealing force.The performance that the oil resistant rubber of filler 3 internal layer makes it obtain softness, has elasticity, compression rebound rate is large.Middle bearing bed adopts the cotton of wire rope core structure, and it has higher intensity and good saturating machine, the oiling agent lost in timely additional fillers.Outer employing canvas, is compounded to form folder cloth oil resistant rubber, has higher wear resistance and intensity together with oil resistant rubber.
Above-described is only the preferred embodiment of the present invention; should be understood that; for a person skilled in the art; under the prerequisite not departing from structure of the present invention; some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.
Claims (4)
1. stuffing box for gate valve sealing configuration, comprise valve gap, described valve gap is provided with gland, is provided with stuffing box in described valve gap, is provided with filler in described stuffing box, described gland is provided with the projection compressing filler, valve rod is arranged in valve gap, and valve rod, through filler and gland, is characterized in that, the vertical cross-section of described stuffing box is tapered, and stuffing box is greater than the end face away from gland near the end face of gland.
2. stuffing box for gate valve sealing configuration according to claim 1, is characterized in that, described stuffing box along valve rod axially twist.
3. stuffing box for gate valve sealing configuration according to claim 1, is characterized in that, described filler is made up of oil resistant rubber, bearing bed and infantees.
4. stuffing box for gate valve sealing configuration according to claim 1, is characterized in that, described gland and valve gap are bolted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512328.1A CN104265992A (en) | 2014-09-29 | 2014-09-29 | Sealing structure of gate valve stuffing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512328.1A CN104265992A (en) | 2014-09-29 | 2014-09-29 | Sealing structure of gate valve stuffing box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104265992A true CN104265992A (en) | 2015-01-07 |
Family
ID=52157546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410512328.1A Pending CN104265992A (en) | 2014-09-29 | 2014-09-29 | Sealing structure of gate valve stuffing box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104265992A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805323A (en) * | 2016-05-19 | 2016-07-27 | 山东电力建设第工程公司 | Ash leakage preventing shaft sealing device of secondary seal of baffle plate air door |
| CN107542970A (en) * | 2016-06-23 | 2018-01-05 | 天津市滨海华义阀门有限公司 | The sealing structure of gate valve rod |
| CN111373179A (en) * | 2017-11-24 | 2020-07-03 | Bhs桑托芬有限公司 | Device for clamping a gland packing |
-
2014
- 2014-09-29 CN CN201410512328.1A patent/CN104265992A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805323A (en) * | 2016-05-19 | 2016-07-27 | 山东电力建设第工程公司 | Ash leakage preventing shaft sealing device of secondary seal of baffle plate air door |
| CN105805323B (en) * | 2016-05-19 | 2018-11-30 | 山东电力建设第一工程公司 | A kind of baffle ventilation door secondary seal leakproof ash gland seal device |
| CN107542970A (en) * | 2016-06-23 | 2018-01-05 | 天津市滨海华义阀门有限公司 | The sealing structure of gate valve rod |
| CN111373179A (en) * | 2017-11-24 | 2020-07-03 | Bhs桑托芬有限公司 | Device for clamping a gland packing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150107 |
|
| WD01 | Invention patent application deemed withdrawn after publication |