CN103343835A - Sealing structure of valve - Google Patents
Sealing structure of valve Download PDFInfo
- Publication number
- CN103343835A CN103343835A CN 201310324252 CN201310324252A CN103343835A CN 103343835 A CN103343835 A CN 103343835A CN 201310324252 CN201310324252 CN 201310324252 CN 201310324252 A CN201310324252 A CN 201310324252A CN 103343835 A CN103343835 A CN 103343835A
- Authority
- CN
- China
- Prior art keywords
- valve
- ptfe
- filler
- ring
- packing
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 28
- 238000012856 packing Methods 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 24
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 15
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 15
- 239000000945 filler Substances 0.000 claims description 44
- 210000004907 gland Anatomy 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 abstract description 9
- 239000010439 graphite Substances 0.000 abstract description 9
- 238000005461 lubrication Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 230000009977 dual effect Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 3
- 229940058401 polytetrafluoroethylene Drugs 0.000 abstract 3
- 239000010687 lubricating oil Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
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- Sealing Devices (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a sealing mechanism of a valve. The sealing mechanism of a valve comprises a packing bin, stuffing boxes, a first shaft sleeve, a graphite packing ring, a second shaft sleeve, a sleeve ring, a third shaft sleeve, a PTFE (poly tetra fluoro ethylene) or PTFE-carbon packing ring, a fourth shaft sleeve as well as a spring package component and a pressing cover, wherein the packing bin is arranged on the valve; the stuffing boxes are sequentially arranged from bottom to top; the spring package component and the pressing cover are arranged on the upper part of the packing bin; an inner annular groove and an outer annular groove are respectively formed at the inner side and the outer side of the sleeve ring, and are communicated by a communicated through hole so as to allow lubricating oil to enter the inner side of the sleeve ring. The sealing mechanism provided by the invention has the dual capabilities of PTFE or PTFE-carbon and a graphite component, can bear the highest temperature of 232 DEG C maximally, has low frictional force for the convenience of leakage and emission, meets a fireproof test scheme, meanwhile guarantees the correct match of a valve rod or a valve shaft in the center of a valve cover by adopting the design of multiple shaft sleeves and the central shaft sleeve, overcomes the performance obstacle to valve performances caused by the packing system, prolongs the use time of the packing system effectively, and also can meet the requirements of temperature pressure and lubrication sealing at the same time through arranging double sealing structures and optimizing the structure.
Description
Technical field
The present invention relates to the valve seal technical field, particularly relate to a kind of sealing mechanism of valve.
Background technique
The valve part of control valve is made up of internals and the valve body of valve, the internals of valve comprise spool, valve rod, stuffing box and bonnet etc., wherein filler assembly is used for the sealing to valve rod, be to prevent that with elastic method processing medium from moving by reciprocating type or rotary type and in stem surface generation leakage, it is the valve body inalienable part.
Usually adopting individual layer PTFE V-ring filler and graphite packing combination in the prior art, is two kinds of typical filler combination.Individual layer PTFE V-ring filler service condition provides excellent sealing performance and has only minimum operation frictional force when pressure≤2.07MPa, temperature are between-18～93 ℃.In this structure, filler flange has compressed inner packing ring from the outside, and the spring of packing ring bottom has compressed packing ring internally.This structure makes and radially contacts pressure distribution vertically between filler and valve rod and be tending towards evenly, makes respectively to enclose filler and can both play seal action, is easy to realize sealing.The valve rod middle part then easily forms thicker liquid film, plays good lubrication, can alleviate filler to the wearing and tearing of valve rod, prolongs the working life of valve.
And the graphite packing composite structure is simple and clear, generally is equipped with valve positioner and uses.Its sealing is that pressured lid compresses filler from the outside and realizes, under gland compresses responsive to axial force, produces between filler and the valve rod and radially contacts pressure.This structure is convenient to make, is processed and maintenance.
But the defective that original technology exists: individual layer PTFE V-ring filler serviceability temperature can not provide good sealing property below 273 ℃ during near 100 ℃.Serviceability temperature has narrow limitation, is not suitable for High temperature valve.The graphite packing combined sealing structure is applicable to the mesolow valve.Shortcoming is the density height owing to it, so tension may block valve rod and be unfavorable for sealing.
Summary of the invention
The objective of the invention is at the technological deficiency that exists in the prior art, and the sealing mechanism of valve of the requirement of a kind of while satisfied temperature pressure and lubrication and seal is provided.
For realizing that the technological scheme that purpose of the present invention adopts is:
A kind of sealing mechanism of valve, comprise in the filler storehouse that is arranged on described valve and the stuffing box that sets gradually from bottom to top, first axle sleeve, carbon packing ring, second axle sleeve, the collar, the 3rd axle sleeve, PTFE or PTFE-carbon filler ring, the 4th axle sleeve and the spring pack assembly and the gland that are arranged on top, filler storehouse, the inside and outside both sides of the described collar are formed with outer annular recess and inner annular recess respectively, and described outer annular recess and outer annular recess are communicated with to allow lubricant oil to enter collar inboard by the through hole that connects.
Described carbon packing ring is twice or more than the twice, between the carbon packing ring of bottommost and first shaft room, two adjacent carbon packing rings and carbon packing ring and second shaft room at top be provided with the filler pad.
Described filler pad is the zinc material, and its thickness is at 1.25 to 1.5 ㎜.
Described PTFE or PTFE-carbon filler ring are twice or more than the twice.
Compared with prior art, the invention has the beneficial effects as follows:
Sealing mechanism of the present invention has the dual capability of PTFE or PTFE-carbon and graphite components, the highest bearing temperature is up to 232 ℃, have low-frictional force and make the leakage discharging, satisfy the flammability test scheme, adopt valve rod that the design of multistage axle sleeve and the center collar guarantees or valve shaft in the correct cooperation at valve gap center simultaneously, overcome the performance penalty that filling system brings valve performance, effectively prolonged the service time of filling system, and by double sealing configuration being set and optimizing structure, the requirement of satisfied temperature pressure and lubrication and seal simultaneously.
Description of drawings
Figure 1 shows that sealed structural representation of the present invention.
Symbol description: 1. stuffing box; 2. carbon packing ring; 3. the collar; 4. complete PTFE-carbon/PTFE filler;
5. filler flange; 6. dish spring; 7. Gland; 8. axle sleeve; 9. axle sleeve; 10. axle sleeve; 11. filler pad; 12. axle sleeve.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
The mentioned valve of the present invention comprises that the center is formed with the valve gap and the valve shaft or the valve rod that run through described valve gap through hole of through hole, in the through hole of described valve gap, also be formed with the filler storehouse, described filler storehouse and through hole constitute a shoulder hole structure, formation and the prior art in described filler storehouse are similar, no longer launch to describe at this.
As shown in Figure 1, for guaranteeing the sealing of described valve rod or valve shaft, sealing mechanism of the present invention comprises and is positioned at described filler storehouse and is disposed with stuffing box 1 from bottom to top, first axle sleeve 12, the twice carbon packing ring 2 up and down, second axle sleeve 10, the collar 3, the 3rd axle sleeve 9, PTFE packing ring 4, the 4th axle sleeve 8 and gland 7 and spring pack assembly 6 and filler flange 5, described gland lower end and the 4th axle sleeve hold to exert pressure for each filler, described spring pack assembly, be preferably the dish spring, be arranged between filler flange and gland so that steady pressure to be provided downwards.Wherein, described carbon packing ring and first shaft room down, upper and lower graphite packing interannular, last carbon packing ring and 4 on second axle sleeve are respectively arranged with a filler pad 11, described filler pad is the zinc material, and its thickness is preferably 1.4mm at 1.25 to 1.5 ㎜.Wherein, the described collar 3 inside and outside both sides are formed with outer annular recess and inner annular recess respectively, and described outer annular recess and outer annular recess are communicated with to allow lubricant oil to enter collar inboard by the through hole that connects valve rod and each assembly are lubricated.Described gland is fixedlyed connected with valve gap by bolt and spring pack assembly and each filler is compressed, make Gland act on pressure bigger on the filler all the time, thereby can prevent lax or lax the leaking outside of causing of filler because of gland bolt, it is constant to make that filler load remains.
Wherein, described stuffing box is arranged on the bottommost in filler storehouse, be used for laying each filler and associated components and providing valve rod or the motive sealing of valve shaft elasticity, described packing ring is ring structure, and a side of its longitudinal section is the leakage of T font structure to prevent that valve internal procedure fluid from producing by stem surface.Because stiction and kinetic force of friction are arranged during stem movement, this novel stuffing box adopts a cross section to be T font structural design to have improved serviceability in little satisfying frictional force.Described filler pad is in order to separate the component of identical material, prevent identical material contact and produce than galling.Described PTFE-carbon or PTFE filler are commercial complete element, its length of looking valve rod or valve shaft arranges twice or multiple tracks, certainly, described carbon packing ring also not only is confined to twice, and the length of its same visual valve rod or valve shaft arranges multiple tracks and at per two adjacent graphite packing interannulars the filler pad is set.
Sealing mechanism of the present invention has the dual capability of PTFE and graphite components, the highest bearing temperature is up to 232 ℃, have low-frictional force and make the leakage discharging, satisfy the flammability test scheme, adopt valve rod that the design of multistage axle sleeve and the center collar guarantees or valve shaft in the correct cooperation at valve gap center simultaneously, overcome the performance penalty that filling system brings valve performance, effectively prolonged the service time of filling system, and by double sealing configuration being set and optimizing structure, the requirement of satisfied temperature pressure and lubrication and seal simultaneously.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. the sealing mechanism of a valve, it is characterized in that, comprise in the filler storehouse that is arranged on described valve and the stuffing box that sets gradually from bottom to top, first axle sleeve, carbon packing ring, second axle sleeve, the collar, the 3rd axle sleeve, PTFE or PTFE-carbon filler ring, the 4th axle sleeve and the gland and the spring pack assembly that are arranged on top, filler storehouse, the inside and outside both sides of the described collar are formed with outer annular recess and inner annular recess respectively, and described outer annular recess and outer annular recess are communicated with to allow lubricant oil to enter collar inboard by the through hole that connects.
2. sealing mechanism as claimed in claim 1, it is characterized in that, described carbon packing ring is twice or more than the twice, between the carbon packing ring of bottommost and first shaft room, two adjacent carbon packing rings and carbon packing ring and second shaft room at top be provided with the filler pad.
3. sealing mechanism as claimed in claim 2 is characterized in that, described filler pad is the zinc material, and its thickness is at 1.25 to 1.5 ㎜.
4. sealing mechanism as claimed in claim 3 is characterized in that, described PTFE or PTFE-carbon filler ring are twice or more than the twice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310324252 CN103343835A (en) | 2013-07-29 | 2013-07-29 | Sealing structure of valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310324252 CN103343835A (en) | 2013-07-29 | 2013-07-29 | Sealing structure of valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103343835A true CN103343835A (en) | 2013-10-09 |
Family
ID=49278653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310324252 Pending CN103343835A (en) | 2013-07-29 | 2013-07-29 | Sealing structure of valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103343835A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742709A (en) * | 2013-11-29 | 2014-04-23 | 成都欧浦特控制阀门有限公司 | Packing seal structure |
| CN104110496A (en) * | 2014-04-02 | 2014-10-22 | 衢州兰玲机电科技有限公司 | Sealing structure for rotary shaft of flue gas valve |
| CN104482223A (en) * | 2014-12-28 | 2015-04-01 | 潍坊力创电子科技有限公司 | Gas injection valve with lubricating mechanism |
| CN107191669A (en) * | 2017-06-19 | 2017-09-22 | 苏州宝骅密封科技股份有限公司 | The leak detecting device of packing seal |
| CN108591600A (en) * | 2018-06-20 | 2018-09-28 | 武汉汉德阀门股份有限公司 | A kind of valve rod leak-proof structure |
| CN109882602A (en) * | 2019-04-10 | 2019-06-14 | 浙江天地环保科技有限公司 | A kind of device improving the poppet sealing of RTO furnace |
| CN114440000A (en) * | 2021-12-24 | 2022-05-06 | 合肥通用机械研究院有限公司 | A composite packing sealing system for ultra-high pressure hydrogen energy valve |
-
2013
- 2013-07-29 CN CN 201310324252 patent/CN103343835A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742709A (en) * | 2013-11-29 | 2014-04-23 | 成都欧浦特控制阀门有限公司 | Packing seal structure |
| CN104110496A (en) * | 2014-04-02 | 2014-10-22 | 衢州兰玲机电科技有限公司 | Sealing structure for rotary shaft of flue gas valve |
| CN104482223A (en) * | 2014-12-28 | 2015-04-01 | 潍坊力创电子科技有限公司 | Gas injection valve with lubricating mechanism |
| CN107191669A (en) * | 2017-06-19 | 2017-09-22 | 苏州宝骅密封科技股份有限公司 | The leak detecting device of packing seal |
| CN107191669B (en) * | 2017-06-19 | 2023-12-15 | 苏州宝骅密封科技股份有限公司 | Leakage detection device for packing seal |
| CN108591600A (en) * | 2018-06-20 | 2018-09-28 | 武汉汉德阀门股份有限公司 | A kind of valve rod leak-proof structure |
| CN109882602A (en) * | 2019-04-10 | 2019-06-14 | 浙江天地环保科技有限公司 | A kind of device improving the poppet sealing of RTO furnace |
| CN114440000A (en) * | 2021-12-24 | 2022-05-06 | 合肥通用机械研究院有限公司 | A composite packing sealing system for ultra-high pressure hydrogen energy valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131009 |