CN103742709A - Packing seal structure - Google Patents
Packing seal structure Download PDFInfo
- Publication number
- CN103742709A CN103742709A CN201310619880.6A CN201310619880A CN103742709A CN 103742709 A CN103742709 A CN 103742709A CN 201310619880 A CN201310619880 A CN 201310619880A CN 103742709 A CN103742709 A CN 103742709A
- Authority
- CN
- China
- Prior art keywords
- guide pipe
- packing
- packing ring
- valve rod
- pipe
- 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
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Classifications
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- 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
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- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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- 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)
- Details Of Valves (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a packing seal structure. The packing seal structure comprises a valve body, a valve rod arranged inside the valve body and a valve element connected to the lower end of the valve rod, and further comprises a lower guide pipe, two to four circles of lower packing rings are arranged above the lower guide pipe, a middle sealing pipe is arranged above the lower packing rings, four to eight circles of upper packing rings are arranged above the middle sealing pipe, an upper guide pipe is arranged above the upper packing rings, and the upper guide pipe, the lower guide pipe, the lower packing rings, the upper packing rings and the middle sealing pipe are connected to the valve rod in a sleeved mode and make contact with the interior of the valve body. According to the packing seal structure, the movement stability of the valve rod can be enhanced, the valve problem caused by the sleeve guiding is eliminated, the sealing of the valve rod part can be enhanced, and the service life of packing is prolonged.
Description
Technical field
The present invention relates to a kind of packing seal system, be specifically related to for a kind of packing seal structure on valve.
Background technique
By filler, block can be used for back and forth or the contact-type motive sealing rotatablely moving of leakage path, mainly contain soft packing seal and hard packing and seal two classes.Soft packing seal claims again packing_seal, and the filler in stuffing box is subject to the responsive to axial force of gland and radially swelling, to reach sealing purpose.Soft packing is often comprised of fiber (asbestos, nylon etc.), oiling agent (graphite, molybdenum disulfide, French chalk etc.) and various wire strengthening agent.After filler wearing and tearing, can be compensated by tighting a bolt.Wadding seal structure is simple, reliable, easily maintenance, corrosion-resistant and high temperature resistant, once be widely used as running shaft and the sealing of reciprocating rod member, but area of contact, surface friction drag, power consumption and wearing and tearing are all larger, except low speed stem movement still has employing, by mechanical seal, replaced gradually.
Existing valve rod in motion, stability deficiency, and adopt single packing seal, sealing is not strong, causes whole valve seal performance bad.
Summary of the invention
The invention provides a kind of packing seal structure, can strengthen the stability of stem movement, eliminate the problems with valves that cage guiding brings, and can also strengthen the sealing at valve rod position, extend the working life of filler.
Object of the present invention reaches by the following technical programs:
A kind of packing seal structure, comprise valve body, be arranged on valve rod in valve body, be connected to the spool of valve rod lower end, also comprise lower guide pipe, described lower guide pipe top is provided with the lower packing ring of 2-4 circle, lower packing ring top is provided with intermediate seal pipe, intermediate seal pipe top is provided with the upper packing ring of 4-8 circle, and upper packing ring top is provided with guide pipe, and upper guide pipe, lower guide pipe, lower packing ring, upper packing ring are socketed on valve rod and contact with in valve body with intermediate seal Guan Jun.
The setting of upper and lower guide pipe can stabilize valve rod from two ends, prevents that valve rod from too vibrating, and plays the effect of the stability that strengthens stem movement.The setting of lower packing ring and upper packing ring can be strengthened from upper and lower two ends the sealing at valve rod position, and the setting of the seal ring number of plies, can coordinate the length of intermediate seal pipe suitably to increase and decrease the seal ring number of plies, the seal ring number of turns is suitably for well, too much can make the possibility that seal ring is corroded increase, if the seal ring number of turns is crossed, sealing effect is not good at least, and the length of intermediate seal pipe will suitably increase, and so can how much cause the series of problems that sleeve pipe brings yet.
In lower packing ring and upper packing ring, be provided with V-arrangement layer or the O shape layer of teflon or perfluor mystery rubber.
The V-arrangement layer of described lower packing ring and upper packing ring or O shape layer are outward carburizing teflon or polyether-ether-ketone.O-ring seals with low cost, good airproof performance, using scope is wide, and simple in structurely has a self-tightening, often only with a Sealing, just can complete sealing, good sealing effect, during for reciprocating movement sealing, its sealability is constant, medium amount of leakage is little.V-ring is a kind of lip-type packing, and under free state, the lip external diameter of v-ring is greater than the internal diameter of packing cavity, and the internal diameter of lip is less than the external diameter of valve rod, and v shaped ring can be seized power overlapping use by regulating impacting force to obtain optimal seal effect.
Perfluoroelastomers material is high temperature resistant in current all elaxtic seals, chemical solvent resistance energy and the best rubber material of high-cleanness characteristic, chemical-resistant resistance and Korrosionsmedium (resistance to strong acid, highly basic, ethers, ketone, ester class, nitrogen-containing compound, hydrocarbon class, alcohols, aldehydes, oil, the corrosion of the 1600 number of chemical products such as steam class, amine compound), heatproof can reach 327 ℃, has practicability widely.
Upper guide pipe below is also provided with carbon packing ring, between carbon packing ring and upper packing ring, is provided with intervalve.
In described upper guide pipe and downcomer, be provided with the liner circle layer of teflon.The position that upper guide pipe contacts with seal ring with lower guide pipe is for the consideration of the sealing of total, also need to seal setting, the liner circle layer of the teflon that one deck and its external diameter match is set, to coordinate the overall tightness of reinforcing mechanisms with seal ring in upper guide pipe and lower guide pipe.
Material the be stainless steel identical with valve rod of described upper guide pipe, lower guide pipe and intermediate seal pipe.
The present invention compared with prior art, there is following advantage and beneficial effect:
The present invention is provided with the stuffing box packing combination of guide pipe, lower guide pipe and multi-layer sealed circle, the guide pipe up and down of this dual-top type guide structure the stability that has strengthened stem movement is set, compared with cage guiding, sealed member is split as several, and one of them damages does not affect other continuation use, cost-saving, increase operation rate, eliminated the problems with valves that cage guiding brings, and the filling of double-deck stuffing box, strengthened the sealing at valve rod position.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Wherein, the component title that reference character is corresponding is as follows:
Packing ring, 4-spool under guide pipe, 305-under 1-valve rod, 2-valve body, the upper guide pipe of 301-, the upper packing ring of 302-, 303-intermediate seal pipe, 304-.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1
As shown in Figure 1, a kind of packing seal structure, comprise valve body 2, be arranged on the valve rod 1 in valve body 2, be connected to the spool 4 of valve rod 1 lower end, it is characterized in that: also comprise lower guide pipe 304, lower guide pipe 304 tops are provided with the lower packing ring 305 of 2-4 circle, lower packing ring 305 tops are provided with intermediate seal pipe 303, intermediate seal pipe 303 tops are provided with the upper packing ring 302 of 4-8 circle, upper packing ring 302 tops are provided with guide pipe 301, upper guide pipe 301, lower guide pipe 304, lower packing ring 305, upper packing ring 302 is all socketed on valve rod and contacts with in valve body with intermediate seal pipe 303.
The setting of upper and lower guide pipe can stabilize valve rod from two ends, prevents that valve rod from too vibrating, and plays the effect of the stability that strengthens stem movement.The setting of lower packing ring 305 and upper packing ring 302 can be strengthened from upper and lower two ends the sealing at valve rod position, and the setting of the seal ring number of plies, can coordinate the length of intermediate seal pipe suitably to increase and decrease the seal ring number of plies, the seal ring number of turns is suitably for well, too much can make the possibility that seal ring is corroded increase, if the seal ring number of turns is crossed, sealing effect is not good at least, and the length of intermediate seal pipe will suitably increase, and so can how much cause the series of problems that sleeve pipe brings yet.The sealing number of turns one circle damages can also replace intact seal ring, has extended the working life of seal ring.
As shown in Figure 1, in lower packing ring 305 and upper packing ring 302, be equipped with V-arrangement layer or the O shape layer of teflon or perfluor mystery rubber.The V-arrangement layer of lower packing ring 305 and upper packing ring 302 or O shape layer are outward carburizing teflon or polyether-ether-ketone.
O-ring seals with low cost, good airproof performance, using scope is wide, and simple in structurely has a self-tightening, often only with a Sealing, just can complete sealing, good sealing effect, during for reciprocating movement sealing, its sealability is constant, medium amount of leakage is little.V-ring is a kind of lip-type packing, and under free state, the lip external diameter of v-ring is greater than the internal diameter of packing cavity, and the internal diameter of lip is less than the external diameter of valve rod, and v shaped ring can be seized power overlapping use by regulating impacting force to obtain optimal seal effect.
Perfluoroelastomers material is high temperature resistant in current all elaxtic seals, chemical solvent resistance energy and the best rubber material of high-cleanness characteristic, chemical-resistant resistance and Korrosionsmedium (resistance to strong acid, highly basic, ethers, ketone, ester class, nitrogen-containing compound, hydrocarbon class, alcohols, aldehydes, oil, the corrosion of the 1600 number of chemical products such as steam class, amine compound), heatproof can reach 327 ℃, has practicability widely.
Embodiment 3
As shown in Figure 1,
In upper guide pipe 301 and downcomer 304, be provided with the liner circle layer of teflon.The position that upper guide pipe 301 contacts with seal ring with lower guide pipe 304 is for the consideration of the sealing of total, also need to seal setting, upper guide pipe 301 and lower guide pipe 304 be interior arranges the liner circle layer of the teflon that one deck and its external diameter match, to coordinate the overall tightness of reinforcing mechanisms with seal ring.
Material the be stainless steel identical with valve rod 1 of upper guide pipe 301, lower guide pipe 304 and intermediate seal pipe 303.
Claims (6)
1. a packing seal structure, comprise valve body (2), be arranged on the valve rod (1) in valve body (2), be connected to the spool (4) of valve rod (1) lower end, it is characterized in that: also comprise lower guide pipe (304), described lower guide pipe (304) top is provided with the lower packing ring (305) of 2-4 circle, lower packing ring (305) top is provided with intermediate seal pipe (303), intermediate seal pipe (303) top is provided with the upper packing ring (302) of 4-8 circle, upper packing ring (302) top is provided with guide pipe (301), upper guide pipe (301), lower guide pipe (304), lower packing ring (305), upper packing ring (302) is all socketed on valve rod and contacts with in valve body with intermediate seal pipe (303).
2. a kind of packing seal structure according to claim 1, is characterized in that: the V-arrangement layer or the O shape layer that in lower packing ring (305) and upper packing ring (302), are provided with teflon or perfluor mystery rubber.
3. a kind of packing seal structure according to claim 1, is characterized in that: the V-arrangement layer of described lower packing ring (305) and upper packing ring (302) or O shape layer are outward carburizing teflon or polyether-ether-ketone.
4. a kind of packing seal structure according to claim 1, is characterized in that: upper guide pipe (301) below is also provided with carbon packing ring, between carbon packing ring and upper packing ring, is provided with intervalve.
5. a kind of packing seal structure according to claim 1, is characterized in that: the liner circle layer that is provided with teflon in upper guide pipe (301) and downcomer (304).
6. a kind of packing seal structure according to claim 1, is characterized in that: material the be stainless steel identical with valve rod (1) of described upper guide pipe (301), lower guide pipe (304) and intermediate seal pipe (303).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310619880.6A CN103742709A (en) | 2013-11-29 | 2013-11-29 | Packing seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310619880.6A CN103742709A (en) | 2013-11-29 | 2013-11-29 | Packing seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103742709A true CN103742709A (en) | 2014-04-23 |
Family
ID=50499759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310619880.6A Pending CN103742709A (en) | 2013-11-29 | 2013-11-29 | Packing seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103742709A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455701A (en) * | 2014-11-24 | 2015-03-25 | 苏州福润机械有限公司 | Double-layer dynamical seal structure of valve |
| CN112648374A (en) * | 2020-12-30 | 2021-04-13 | 清华大学 | Soft packing sealing device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4527806A (en) * | 1984-12-12 | 1985-07-09 | Fmc Corporation | Valve stem packing |
| JPH11182730A (en) * | 1997-12-17 | 1999-07-06 | Yamatake Corp | Valve gear |
| CN201599453U (en) * | 2009-11-18 | 2010-10-06 | 河南航天压力元件有限公司 | Gas ball valve |
| CN201731168U (en) * | 2010-08-03 | 2011-02-02 | 浙江贝尔控制阀门有限公司 | Linear motion control valve with self-sealing structure |
| CN202812440U (en) * | 2012-06-21 | 2013-03-20 | 镇江市铸造阀门厂有限公司 | Valve rod multiple sealing device for ultralow temperature and special valves |
| CN103343835A (en) * | 2013-07-29 | 2013-10-09 | 天津奥美自动化系统有限公司 | Sealing structure of valve |
| CN203571201U (en) * | 2013-11-29 | 2014-04-30 | 成都欧浦特控制阀门有限公司 | Out-leakage prevention type packing sealing system |
-
2013
- 2013-11-29 CN CN201310619880.6A patent/CN103742709A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4527806A (en) * | 1984-12-12 | 1985-07-09 | Fmc Corporation | Valve stem packing |
| JPH11182730A (en) * | 1997-12-17 | 1999-07-06 | Yamatake Corp | Valve gear |
| CN201599453U (en) * | 2009-11-18 | 2010-10-06 | 河南航天压力元件有限公司 | Gas ball valve |
| CN201731168U (en) * | 2010-08-03 | 2011-02-02 | 浙江贝尔控制阀门有限公司 | Linear motion control valve with self-sealing structure |
| CN202812440U (en) * | 2012-06-21 | 2013-03-20 | 镇江市铸造阀门厂有限公司 | Valve rod multiple sealing device for ultralow temperature and special valves |
| CN103343835A (en) * | 2013-07-29 | 2013-10-09 | 天津奥美自动化系统有限公司 | Sealing structure of valve |
| CN203571201U (en) * | 2013-11-29 | 2014-04-30 | 成都欧浦特控制阀门有限公司 | Out-leakage prevention type packing sealing system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455701A (en) * | 2014-11-24 | 2015-03-25 | 苏州福润机械有限公司 | Double-layer dynamical seal structure of valve |
| CN112648374A (en) * | 2020-12-30 | 2021-04-13 | 清华大学 | Soft packing sealing device |
| CN112648374B (en) * | 2020-12-30 | 2022-07-05 | 清华大学 | Soft packing sealing device |
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Application publication date: 20140423 |