CN106246947A - The installation method of gate valve seat sealing ring - Google Patents
The installation method of gate valve seat sealing ring Download PDFInfo
- Publication number
- CN106246947A CN106246947A CN201610630747.4A CN201610630747A CN106246947A CN 106246947 A CN106246947 A CN 106246947A CN 201610630747 A CN201610630747 A CN 201610630747A CN 106246947 A CN106246947 A CN 106246947A
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- CN
- China
- Prior art keywords
- valve seat
- cannelure
- seat insert
- insert
- sealing ring
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- 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
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses the installation method of gate valve seat sealing ring, it comprises the following steps: (1), valve seat insert pretreatment: is immersed by valve seat insert and preheats 30 40min in aerial kerosene at 50 60 DEG C, then is incubated after being warming up to 80 90 DEG C with the speed of 46 DEG C/min；(2), cannelure is offered: on valve seat, offer the cannelure that can accommodate valve seat insert；(3), cannelure pretreatment: insert Colophonium powder in cannelure；(4), assembling valve seat insert: valve seat insert is put into cannelure by taking-up in aerial kerosene；(5), cooling processes: stacks dry ice at tape surface, removes adhesive tape after dry ice volatilizees.The invention has the beneficial effects as follows that one coordinates intensity to enhance valve seat insert and cannelure, two improve pressure, the decay resistance of valve seat insert, and three extend the service life of valve seat insert.
Description
Technical field
The present invention relates to valve manufacture field, particularly relate to the installation method of gate valve seat sealing ring.
Background technology
Gate valve (gate valve) is an opening and closing element flashboard, and the direction of motion of flashboard is perpendicular with flow direction, gate valve
Standard-sized sheet and fully closed can only be made, uncomfortable door parameter and different, usually 5 ° is 2 ° 52 when medium temperature is the highest '.Wedge Gate Valves
Flashboard can be integrally formed, and is called rigidity flashboard；The flashboard that can produce micro-deformation can also be made, to improve its technique
Property, making up the deviation that sealing surface angle produces in the course of processing, this flashboard is called flexible disc.When gate valve is closed, seal
Face can rely only on pressure medium and seal, and i.e. relies on pressure medium to be ensured by the valve seat that the sealing surface of flashboard presses to opposite side
The sealing of sealing surface, here it is self sealss.Major part gate valve is to use forced seal, i.e. during valve closing, external force to be relied on
By force flashboard is pressed to valve seat, to ensure the sealing of sealing surface.The flashboard of gate valve is for linear motion with valve rod, cries and rises
Fall lever brake valve, is also Outside screw stem rising through handwheel type gate valve.On elevating lever, generally there is trapezoidal thread, by the nut of valve tip and valve body
Guide groove, becomes linear motion by rotary motion, namely becomes operation torque operating thrust.During Open valve, when flashboard carries
When rise is equal to 1:1 times of valve latus rectum, the passage of fluid is the most unimpeded, but operationally, this position cannot monitor.
Time actually used, it be using the summit of valve rod as mark, i.e. open motionless position, as its fully open position.For considering temperature
There is deadlock phenomenon in change, is generally reaching on vertex position, then refunds 1/2-1 circle, as the position of standard-sized sheet valve.Therefore,
The fully open position of valve, is determined by the position of flashboard i.e. stroke.Some gate valves, valve stem nut is located on flashboard, hand wheel rotating
Band ovable valve stem rotates, and makes flashboard promote, and this valve is called swingle gate valve, or is inside screw nonrising stem type gate valve.Compression type in gate valve
Valve seat insert, is mainly made up of valve seat, valve seat insert.Valve seat insert uses PTFE, RPTFE, nylon, PEEK etc. soft close
Closure material, valve seat insert is radially processed several steam vents, by thrust, valve seat insert is pressed into valve seat.Valve seat is close
Seal baseplane produces local plastic deformation under the effect of thrust, and is in close contact realization sealing with valve seat bottom land plane.
But there are two problems in traditional compression type valve seat insert, one be valve seat be flat seal with valve seat insert, put on valve
The thrust size of seat sealing ring depends on valve seat bottom land plane and the roughness of valve seat insert baseplane, is relatively difficult to control
System, if thrust is the least, valve seat is not enough with valve seat insert seal pressure, and fluid easily leaks from contact site, if pressure
Clamp force is too big, and compression stress is too big, and valve seat insert occurs serious deformation, conquassation valve seat insert time serious.Two is pressurized
Power and the impact of temperature, valve seat is the most loose with valve seat insert contact stress, and fluid easily leaks from contact site.
China utility model application CN201220415354.9 discloses a kind of embedded valve seat sealing ring, valve seat bottom land
Being provided with several prominent toothed surface, valve seat is radially provided with steam vent, a sealing ring inserted valve seat bottom land, and with bottom land toothed surface
It is in close contact and realizes sealing.The advantage of this utility model is that valve seat insert prominent toothed surface some with valve seat bottom land closely connects
Touch and realize sealing；Valve seat insert will not deform；During pressure, temperature variation, the some prominent toothed surface of valve seat bottom land and valve seat
Sealing ring baseplane closely cooperates owing to embedding, and contact stress will not occur loose, and fluid will not leak.But there is valve in the program
Seat sealing ring is to be closely cooperated with valve seat bottom land by bottom land toothed surface, and stress point is little, and footprint pressure is big, it is easy to close to valve seat
Seal causes damage, once produce pressure, temperature variation, valve seat insert can cause bigger destruction.Shorten valve seat close
The life-span of seal.
Summary of the invention
The technical problem to be solved in the present invention is that existing valve seat insert installation method causes valve seat insert easily damaged,
Shorten the life-span of valve seat insert, the installation method of a kind of gate valve seat sealing ring is provided for this.
The technical scheme is that the installation method of gate valve seat sealing ring, it comprises the following steps: (1), valve seat are close
Seal pretreatment: valve seat insert is immersed and preheats 30-40min in aerial kerosene at 50-60 DEG C, then with 4-6 DEG C/min's
Speed is incubated after being warming up to 80-90 DEG C；(2), cannelure is offered: on valve seat, offer the cannelure that can accommodate valve seat insert,
The longitudinal section of described cannelure is up-small and down-big T-shaped；(3), cannelure pretreatment: in cannelure, insert Colophonium powder, right
Cannelure carries out intensification heating and makes Colophonium powder be molten state the 1/3-2/3 being full of cannelure volume, and described intensification is heated
It is to be warming up to 120-130 DEG C with the speed of 6-8 DEG C/min；(4), assembling valve seat insert: by valve seat insert by aerial kerosene
Cannelure is put in middle taking-up, with adhesive tape, cannelure is carried out closed processes, and seal time is 10-20min；(5), at cooling
Reason: stack dry ice at tape surface, removes adhesive tape after dry ice volatilizees.
The improvement of such scheme is that to insert with Colophonium powder mass ratio after described step (3) cannelure pretreatment be 1:10-
The titania powder of 15.
Valve seat insert described in such scheme is NR natural rubber sealing ring.
The invention has the beneficial effects as follows valve base sealing collar member pretreatment, strengthen its thermoplasticity, after being fitted into T-shaped cannelure
Utilize Colophonium to make it expand its heating, it is ensured that valve seat insert and the fit of T-shaped cannelure, finally carry out cooling process
Make valve seat insert condense molding, one enhance valve seat insert and cannelure coordinate intensity, two to improve valve seat close
Pressure, the decay resistance of seal, three extend the service life of valve seat insert.
Detailed description of the invention
The installation method of gate valve seat sealing ring, it comprises the following steps: (1), valve seat insert pretreatment: valve seat is close
Seal is immersed and is preheated 30-40min in aerial kerosene at 50-60 DEG C, then after being warming up to 80-90 DEG C with the speed of 4-6 DEG C/min
Insulation；(2), offer cannelure: on valve seat, offer the cannelure that can accommodate valve seat insert, the longitudinal section of described cannelure in
Up-small and down-big is T-shaped；(3), cannelure pretreatment: insert Colophonium powder in cannelure, cannelure is carried out intensification heating and makes
Obtaining Colophonium powder is molten state the 1/3-2/3 being full of cannelure volume, and described intensification heating is the speed liter with 6-8 DEG C/min
Temperature is to 120-130 DEG C；(4), assembling valve seat insert: valve seat insert is put into cannelure by taking-up in aerial kerosene, uses
Adhesive tape carries out closed processes to cannelure, and seal time is 10-20min；(5), cooling process: tape surface stack dry ice,
Adhesive tape is removed after dry ice volatilizees.
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1: the installation method of gate valve seat sealing ring, it comprises the following steps: (1), valve seat insert pretreatment:
NR natural rubber sealing ring is immersed aerial kerosene preheats at 50 DEG C 30min, then be warming up to 80 DEG C with the speed of 4 DEG C/min
Rear insulation；(2), cannelure is offered: on valve seat, offer the cannelure that can accommodate NR natural rubber sealing ring, described cannelure
Longitudinal section is up-small and down-big T-shaped；(3), cannelure pretreatment: insert Colophonium powder in cannelure, cannelure is risen
Temperature heating makes Colophonium powder be molten state and be full of the 1/3 of cannelure volume, and described intensification heating is with the speed of 6 DEG C/min
It is warming up to 120 DEG C；(4), assembling valve seat insert: NR natural rubber sealing ring is put into cannelure by taking-up in aerial kerosene
In, with adhesive tape, cannelure being carried out closed processes, seal time is 10min；(5), cooling processes: be allowed to dry at tape surface heap
Ice, removes adhesive tape after dry ice volatilizees.
Embodiment 2: the installation method of gate valve seat sealing ring, it comprises the following steps: (1), valve seat insert pretreatment:
NR natural rubber sealing ring is immersed aerial kerosene preheats at 55 DEG C 35min, then be warming up to 85 DEG C with the speed of 5 DEG C/min
Rear insulation；(2), cannelure is offered: on valve seat, offer the cannelure that can accommodate NR natural rubber sealing ring, described cannelure
Longitudinal section is up-small and down-big T-shaped；(3), cannelure pretreatment: insert Colophonium powder in cannelure, cannelure is risen
Temperature heating makes Colophonium powder be molten state and be full of the 1/2 of cannelure volume, and described intensification heating is with the speed of 7 DEG C/min
It is warming up to 125 DEG C；(4), assembling valve seat insert: NR natural rubber sealing ring is put into cannelure by taking-up in aerial kerosene
In, with adhesive tape, cannelure being carried out closed processes, seal time is 15min；(5), cooling processes: be allowed to dry at tape surface heap
Ice, removes adhesive tape after dry ice volatilizees.
Embodiment 3: the installation method of gate valve seat sealing ring, it comprises the following steps: (1), valve seat insert pretreatment:
NR natural rubber sealing ring is immersed aerial kerosene preheats at 60 DEG C 40min, then be warming up to 90 DEG C with the speed of 6 DEG C/min
Rear insulation；(2), cannelure is offered: on valve seat, offer the cannelure that can accommodate NR natural rubber sealing ring, described cannelure
Longitudinal section is up-small and down-big T-shaped；(3), cannelure pretreatment: insert Colophonium powder in cannelure, cannelure is risen
Temperature heating makes Colophonium powder be molten state and be full of the 2/3 of cannelure volume, and described intensification heating is with the speed of 8 DEG C/min
It is warming up to 130 DEG C；(4), assembling valve seat insert: NR natural rubber sealing ring is put into cannelure by taking-up in aerial kerosene
In, with adhesive tape, cannelure being carried out closed processes, seal time is 20min；(5), cooling processes: be allowed to dry at tape surface heap
Ice, removes adhesive tape after dry ice volatilizees.
The NR natural rubber sealing ring tool that the present invention uses has good wearability, elastic, breaking strength and percentage elongation, but
The most aging, heat becomes glutinous, utilizes that this characteristic is existing is entered the pre-heat treatment in aerial kerosene so that it is softening and the oldest
Change, persistently overheating and send expansion after receiving the heat transfer of Colophonium after it puts into cannelure so that it is bottom and cannelure
Bottom is adaptive, forms up-small and down-big T-type structure, and the volume of Colophonium filling cannelure is difficult to too small to less than 1/3, otherwise can not
Valve seat insert carrying out the full cladding of side coil, is not easy to excessive more than 2/3, otherwise Colophonium can overflow, and affects subsequent handling
Carrying out.The speed of heating of heating up is careful controls, heats up too fast or crosses the slow moulding process that all can affect valve seat insert.Step
Suddenly the cooling of (5) utilizes dry ice so that it is the cold of generation passes in cannelure by adhesive tape, make the valve seat insert that is heated with
Colophonium is combined closely and hardened forming, obtains final finished.
The preferred embodiments of the present invention 4 are that to insert with Colophonium powder mass ratio after step (3) cannelure pretreatment be 1:10
Titania powder, preferred embodiment 5 is that to insert with Colophonium powder mass ratio after step (3) cannelure pretreatment be 1:15
Titania powder, filling titania powder can make valve seat insert have as stabilizer when pressure, temperature variation
Having certain resistance, titanium dioxide can improve the anti-wear performance of valve seat insert simultaneously, makes valve seat insert to bear bigger
Frictional force, extend valve seat insert life-span.
Claims (3)
1. the installation method of gate valve seat sealing ring, is characterized in that it comprises the following steps: (1), valve seat insert pretreatment: will
Valve seat insert immerses and preheats 30-40min in aerial kerosene at 50-60 DEG C, then is warming up to 80-with the speed of 4-6 DEG C/min
It is incubated after 90 DEG C；(2), cannelure is offered: on valve seat, offer the cannelure that can accommodate valve seat insert, indulging of described cannelure
Cross section is up-small and down-big T-shaped；(3), cannelure pretreatment: insert Colophonium powder in cannelure, cannelure is heated up
Heating makes Colophonium powder be molten state the 1/3-2/3 being full of cannelure volume, and described intensification is heated with 6-8 DEG C/min
Speed is warming up to 120-130 DEG C；(4), assembling valve seat insert: valve seat insert is put into cannelure by taking-up in aerial kerosene
In, with adhesive tape, cannelure being carried out closed processes, seal time is 10-20min；(5), cooling processes: stack at tape surface
Dry ice, removes adhesive tape after dry ice volatilizees.
2. the installation method of gate valve seat sealing ring as claimed in claim 1, is characterized in that described step (3) cannelure is located in advance
Inserting after reason with Colophonium powder mass ratio is the titania powder of 1:10-15.
3. the installation method of gate valve seat sealing ring as claimed in claim 1 or 2, is characterized in that described valve seat insert is NR
Natural rubber sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630747.4A CN106246947B (en) | 2016-08-04 | 2016-08-04 | The installation method of gate valve seat sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630747.4A CN106246947B (en) | 2016-08-04 | 2016-08-04 | The installation method of gate valve seat sealing ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106246947A true CN106246947A (en) | 2016-12-21 |
| CN106246947B CN106246947B (en) | 2018-04-13 |
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ID=58077439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610630747.4A Active CN106246947B (en) | 2016-08-04 | 2016-08-04 | The installation method of gate valve seat sealing ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106246947B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4623122A (en) * | 1985-06-19 | 1986-11-18 | Itt Corporation | Valve with improved seal |
| US5062194A (en) * | 1990-11-13 | 1991-11-05 | General Motors Corporation | Method for installing O-ring seals |
| JPH0833182B2 (en) * | 1990-06-29 | 1996-03-29 | 日本ラインツ株式会社 | Seal ring and how to assemble it |
| JP2005052960A (en) * | 2003-07-18 | 2005-03-03 | Nissan Motor Co Ltd | Installation method of ring part and installation device |
| CN1788937A (en) * | 2005-12-02 | 2006-06-21 | 西南石油学院 | YX shaped polyurethane collar seal mounting process |
| CN102549255A (en) * | 2009-10-14 | 2012-07-04 | 罗伯特·博世有限公司 | Method for installing a sealing ring |
| CN103317336A (en) * | 2013-07-17 | 2013-09-25 | 台州联方机电科技有限公司 | Automatic assembly device and method of O-type sealing ring |
| CN104626049A (en) * | 2014-12-15 | 2015-05-20 | 贵州红林机械有限公司 | Method and device for assembling lining with multiple rubber sealing rings into multi-slot shell |
-
2016
- 2016-08-04 CN CN201610630747.4A patent/CN106246947B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4623122A (en) * | 1985-06-19 | 1986-11-18 | Itt Corporation | Valve with improved seal |
| JPH0833182B2 (en) * | 1990-06-29 | 1996-03-29 | 日本ラインツ株式会社 | Seal ring and how to assemble it |
| US5062194A (en) * | 1990-11-13 | 1991-11-05 | General Motors Corporation | Method for installing O-ring seals |
| JP2005052960A (en) * | 2003-07-18 | 2005-03-03 | Nissan Motor Co Ltd | Installation method of ring part and installation device |
| CN1788937A (en) * | 2005-12-02 | 2006-06-21 | 西南石油学院 | YX shaped polyurethane collar seal mounting process |
| CN102549255A (en) * | 2009-10-14 | 2012-07-04 | 罗伯特·博世有限公司 | Method for installing a sealing ring |
| CN103317336A (en) * | 2013-07-17 | 2013-09-25 | 台州联方机电科技有限公司 | Automatic assembly device and method of O-type sealing ring |
| CN104626049A (en) * | 2014-12-15 | 2015-05-20 | 贵州红林机械有限公司 | Method and device for assembling lining with multiple rubber sealing rings into multi-slot shell |
Non-Patent Citations (1)
| Title |
|---|
| 曹维超: "《组合密封圈安装的快捷方法》", 《材料•工艺•设备》 * |
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| Publication number | Publication date |
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| CN106246947B (en) | 2018-04-13 |
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