CN203421277U - Sealing mechanism of valve - Google Patents

Sealing mechanism of valve Download PDF

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Publication number
CN203421277U
CN203421277U CN201320458136.8U CN201320458136U CN203421277U CN 203421277 U CN203421277 U CN 203421277U CN 201320458136 U CN201320458136 U CN 201320458136U CN 203421277 U CN203421277 U CN 203421277U
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CN
China
Prior art keywords
valve
ptfe
packing
shaft sleeve
ring
Prior art date
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Active
Application number
CN201320458136.8U
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Chinese (zh)
Inventor
邵孟昆
卓杰伟
卓木富
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TIANJIN AOMEI AUTOMATION SYSTEM Co Ltd
Original Assignee
TIANJIN AOMEI AUTOMATION SYSTEM Co Ltd
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Application filed by TIANJIN AOMEI AUTOMATION SYSTEM Co Ltd filed Critical TIANJIN AOMEI AUTOMATION SYSTEM Co Ltd
Priority to CN201320458136.8U priority Critical patent/CN203421277U/en
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Publication of CN203421277U publication Critical patent/CN203421277U/en
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Abstract

The utility model discloses a sealing mechanism of a valve. The sealing mechanism comprises a packing box, a first shaft sleeve, graphite packing rings, a second shaft sleeve, a lantern ring, a third shaft sleeve, a PTFE or PTFE-carbon packing ring, a fourth shaft sleeve, a spring package assembly and a gland, wherein the packing box, the first shaft sleeve, the graphite packing rings, the second shaft sleeve, the lantern ring, the third shaft sleeve, the PTFE or PTFE-carbon packing ring and the fourth shaft sleeve are arranged in a packing bin of the valve and sequentially arranged from bottom to top, and the spring package assembly and the gland are arranged on the upper portion of the packing bin. An inner ring groove and an outer ring groove are formed in the inner side and the outer side of the lantern ring respectively and are communicated through through holes to allow lubricating oil to enter the inner side of the lantern ring. The sealing mechanism has the dual functions of the PTFE or PTFE-carbon packing ring and a graphite assembly, the highest bearing temperature is 232 DEG C, the sealing mechanism has low friction, so that leakage is discharged, and a fireproof test scheme is met; by the adoption of the design of the multiple stages of shaft sleeves and the center lantern ring, a valve rod or a valve shaft can be correctly matched at the center of a valve cover, the performance obstacles of a valve caused by a packing system are overcome, and the service time of the packing system is effectively prolonged; due to the arrangement of the dual-sealing structure and the improvement of the structure, the requirement of temperature pressure and lubricating sealing can be simultaneously met.

Description

The sealing mechanism of valve
Technical field
The utility model relates to valve seal technical field, particularly relates to a kind of sealing mechanism of valve.
Background technique
The valve part of control valve is comprised 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 for the sealing to valve rod, be to prevent that with elastic method processing medium from being moved and being produced leakage in stem surface by reciprocating or rotary type, it is valve body inalienable part.
In prior art, conventionally adopting individual layer PTFE V-ring filler and graphite packing combination, is two kinds of typical filler combination.Individual layer PTFE V-ring filler service condition provides good sealability and only has minimum operation frictional force when pressure≤2.07MPa, temperature are between-18~93 ℃.In this structure, filler flange has compressed inner packing ring from outside, and the spring of packing ring bottom has compressed packing ring from inside.This structure makes between filler and valve rod radially contact distribution vertically be tending towards evenly, makes respectively to enclose filler and can both play seal action, is easy to realize sealing.Valve rod middle part, easily forms thicker liquid film, plays good lubrication, can alleviate the wearing and tearing of filler to valve rod, extends the working life of valve.
And graphite packing composite structure is simple and clear, is generally equipped with valve positioner and uses.Its sealing is that pressured lid is realized from outside compression filler, at gland, compresses under responsive to axial force, produces radially contact between filler and valve rod.This structure is convenient to manufacture, is processed and maintenance.
But the defect that original technology exists: individual layer PTFE V-ring filler serviceability temperature, below 273 ℃, can not provide good sealing while approaching 100 ℃.Serviceability temperature has narrow limitation, is not suitable for High temperature valve.Graphite packing combined sealing structure is applicable to mesolow valve.Shortcoming is because its density is high, so tension may block valve rod and be unfavorable for sealing.
Model utility content
The purpose of this utility model is for the technological deficiency existing in 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 the technological scheme that the purpose of this utility model adopts, be:
A kind of sealing mechanism of valve, comprise in the filling container that is arranged on described valve and the stuffing box setting gradually from bottom to top, the first axle sleeve, carbon packing ring, the 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 filling container top, the inside and outside both sides of the described collar are formed with respectively outer annular recess and inner annular recess, and described outer annular recess and outer annular recess are communicated with to allow lubricant oil to enter collar inner side by the through hole connecting.
Described carbon packing ring is twice or more than twice, between the carbon packing ring of bottommost and the first shaft room, two adjacent carbon packing rings and carbon packing ring and second shaft room of top be provided with filler pad.
Described filler pad is zinc material, and its thickness is at 1.25 to 1.5 ㎜.
Described PTFE or PTFE-carbon filler ring are twice or more than twice.
Compared with prior art, the beneficial effects of the utility model are:
Sealing mechanism of the present utility model has the dual capability of PTFE or PTFE-carbon and graphite components, the highest bearing temperature is up to 232 ℃, there is low-frictional force and make to leak discharge, meet 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 extended 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.
Accompanying drawing explanation
Figure 1 shows that sealed structural representation of the present utility model.
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 pads; 12. axle sleeves.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The mentioned valve of the utility model comprises that center is formed with the valve gap of through hole and runs through valve shaft or the valve rod of described valve gap through hole, in the through hole of described valve gap, be also formed with filling container, described filling container and through hole form a shoulder hole structure, the formation of described filling container similarly to the prior art, no longer launches to describe at this.
As shown in Figure 1, for guaranteeing described valve rod or the sealing of valve shaft, sealing mechanism of the present utility model comprises the filling container described in being positioned at and is disposed with stuffing box 1 from bottom to top, the first axle sleeve 12, upper and lower twice carbon packing ring 2, the 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 to each filler, described spring pack assembly, be preferably dish spring, be arranged between filler flange and gland so that steady pressure to be provided downwards.Wherein, described lower carbon packing ring and the first shaft room, upper and lower graphite packing interannular, upper carbon packing ring and 4, the second axle sleeve are respectively arranged with a filler pad 11, described filler pad is zinc material, and its thickness, at 1.25 to 1.5 ㎜, is preferably 1.4mm.Wherein, the inside and outside both sides of the described collar 3 are formed with respectively outer annular recess and inner annular recess, and described outer annular recess and outer annular recess are communicated with to allow lubricant oil to enter collar inner side by the through hole connecting valve rod and each assembly are lubricated.Described gland is fixedly connected with valve gap by bolt and spring pack assembly and each filler is compressed, make Gland act on all the time pressure larger on filler, thereby can prevent from, because gland bolt is lax or lax the leaking outside of causing of filler, making filler load remain constant.
Wherein, described stuffing box is arranged on the bottommost of filling container, be used for laying each filler and associated components and provide valve rod or the motive sealing of valve shaft elasticity, described packing ring is ring structure, the leakage of the side structure in T shape of its longitudinal section to prevent that valve internal procedure fluid from producing by stem surface.During due to stem movement, have stiction and kinetic force of friction, this novel stuffing box adopts cross section structural design in T shape to improve serviceability in little meeting frictional force.Described filler pad is in order to separate the component of identical material, prevent identical material contact and produce compared with galling.Described PTFE-carbon or PTFE filler are commercial kit, its length depending on valve rod or valve shaft arranges twice or multiple tracks, certainly, described carbon packing ring is also not only confined to twice, and the length of its same visual valve rod or valve shaft arranges multiple tracks and at every two adjacent graphite packing interannulars, filler pad is set.
Sealing mechanism of the present utility model has the dual capability of PTFE and graphite components, the highest bearing temperature is up to 232 ℃, there is low-frictional force and make to leak discharge, meet 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 extended 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 is only preferred implementation of the present utility model; it should be noted that; for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (4)

1. the sealing mechanism of a valve, it is characterized in that, comprise in the filling container that is arranged on described valve and the stuffing box setting gradually from bottom to top, the first axle sleeve, carbon packing ring, the 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 filling container top, the inside and outside both sides of the described collar are formed with respectively outer annular recess and inner annular recess, and described outer annular recess and outer annular recess are communicated with to allow lubricant oil to enter collar inner side by the through hole connecting.
2. sealing mechanism as claimed in claim 1, it is characterized in that, described carbon packing ring is twice or more than twice, between the carbon packing ring of bottommost and the first shaft room, two adjacent carbon packing rings and carbon packing ring and second shaft room of top be provided with filler pad.
3. sealing mechanism as claimed in claim 2, is characterized in that, described filler pad is 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 twice.
CN201320458136.8U 2013-07-29 2013-07-29 Sealing mechanism of valve Active CN203421277U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320458136.8U CN203421277U (en) 2013-07-29 2013-07-29 Sealing mechanism of valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320458136.8U CN203421277U (en) 2013-07-29 2013-07-29 Sealing mechanism of valve

Publications (1)

Publication Number Publication Date
CN203421277U true CN203421277U (en) 2014-02-05

Family

ID=50020376

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320458136.8U Active CN203421277U (en) 2013-07-29 2013-07-29 Sealing mechanism of valve

Country Status (1)

Country Link
CN (1) CN203421277U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106439096A (en) * 2016-10-24 2017-02-22 宁波行泰环保科技有限公司 High-temperature pneumatic three-way rapid-opening stop valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106439096A (en) * 2016-10-24 2017-02-22 宁波行泰环保科技有限公司 High-temperature pneumatic three-way rapid-opening stop valve

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