CN107504205A - The sealing device of piston valve and its application - Google Patents
The sealing device of piston valve and its application Download PDFInfo
- Publication number
- CN107504205A CN107504205A CN201710967385.2A CN201710967385A CN107504205A CN 107504205 A CN107504205 A CN 107504205A CN 201710967385 A CN201710967385 A CN 201710967385A CN 107504205 A CN107504205 A CN 107504205A
- Authority
- CN
- China
- Prior art keywords
- piston
- sealing
- ring
- housing
- gas
- 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
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
- F16J15/30—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of carbon
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
Abstract
The invention belongs to the sealing device of valve and application, particularly relates to sealing device and its application of a kind of piston valve.The sealing device of piston valve includes housing, it is axially fixed in the piston cylinder in housing, coaxial package is matched with piston cylinder and divides gas piston through what dynamic sealing guiding coordinated, divides gas piston front outsides to coordinate gas path on-off and inflow-rate of water turbine inside and outside control housing through dynamic sealing with housing outlets inwall；Piston cylinder and the dynamic sealing divided gas piston and divided between gas piston and housing are MULTILAYER COMPOSITE sealing pair, including the ring packing cylinder being adapted between sealing surface and with it, axially spaced be located between the inside and outside sealing surface of ring packing cylinder uses high temperature resistant composite using gap cooperation or first, second sealing ring of interference fits, first, second sealing ring.The present invention efficiently solves existing product and is unsuitable for the technical barriers such as high-temperature gas conveying control, has the advantages that to be easily installed and repair suitable for high-temperature gas transmission control, sealing pair.
Description
Technical field
The invention belongs to the sealing device of valve and application, particularly relates to sealing device and its application of a kind of piston valve.
Background technology
Piston valve is different from the butterfly valve and gate valve that are only used as pipeline cut-out, and piston valve is to meet that various special regulations require
Valve.Its regulatory function axially moves to realize by one similar to piston-like cylinder in valve pocket, and it both can be with
Cut-out cut-off fluid, the size of flow can also be adjusted.Medium enters housing in arcuation vertically, and the runner in piston valve is axle
Symmetrical, fluid stream is out-of-date will not to produce turbulent flow.The change of flow area is axially to do straight line along pipeline by a piston
Motion is realized.No matter fluid section of the piston in what position, valve pocket is ring-type, is shunk in exit to axle center.Piston valve
With high negotiability, aperture is linear with flow, can be effectively prevented from cavitating and shaking.Inner casing has fairshaped water conservancy diversion
Rib is connected with shell, and stainless steel pistons are slided by reliable guiding, prevents to produce inclination or operation is not smooth.The end face of inner casing upstream into
It is spherical, fluid is formed a progressive formation, piston is operated by the crank connecting link in shell.
The main product of domestic market piston valve is German valve manufacturer --- VAG companies manufacture, and the product is
Improve and develop on the basis of the needle-valve in the U.S., it is resulted from the 1940s, attaining the 1960s in maturation.From
Produced to 2007 the 1960s and be mounted with more than 4000 piston valve.Installation is introduced since the 1990s in China
Piston valve, largely use VAG companies in the engineering projects such as large hydraulic engineering, sewage disposal, water delivery and water generating at present
Product.
Find that existing piston valve is limited only to apply in liquid environment after applicant's inspection information, and have no it in gaseous state
The report applied in material transferring.Due to cavitation erosion, vibration, noise can be produced during gas transport, equally exist tune stream, adjust
Pressure, the needs of speed governing, there is an urgent need to be controlled by valve, particularly in current process of industrialization prosperity period, natural gas,
The long distance transmission of shale gas, coal gas, the pressurization and output of each pressurizing point are required to the control valve of superior performance.But existing piston
Valve cannot be used for the control valve of gas (especially high-temperature gas) conveying, and reason is as follows：First, there is the sealing pair of piston valve equal
Using rubber, due to limited by material tolerable temperature (found after applicant's inspection information, it is preferable as heat resistance
The heatproof of rubber --- fluorubber, silicon rubber etc. is no more than 300 DEG C), the existing piston valve institute using rubber packing material
The gaseous material temperature of conveying is no more than 300 DEG C, but heating gas (such as blast furnace gas, coke-stove gas) instantaneous temperature is up to 450
DEG C, sealing pair can damage because more than its heatproof limit under high-temperature condition.Two be due to that the material that current piston valve is conveyed is equal
For liquid, liquid can play lubrication and cooling effect in course of conveying to parts such as cylinder bucket, pistons, but if pumped (conveying) medium is
Gas then can not produce lubrication to piston and cylinder barrel, and long-play can produce machinery damage to cylinder barrel in the state of lubrication is lost
Wound.
For the scope that applicant understands, the current country there is no national standard or professional standard to carry out piston valve performance indications
Normalization limits.Based on the technical requirements to universal machine and valve, meet that the cooperation between parts is reliable, ensure equipment
Stable operation, realize the difficulty that piston valve construction design is not only for Gaseous materials (especially the flow of high-temperature gas controls) etc.
One of application under point and actual environment needs, while be also the R＆D direction of piston valve.
Applicant discloses a kind of combined type weakening drop in the utility model patent of Patent No. 201620106332.2
Make an uproar pressure regulation valve group, piston type regulating valve includes the piston of housing, piston cylinder, drive mechanism and cylindrical shape, and housing is shaped as flowing
Line style, the front end of housing offers air inlet and rear end offers gas outlet, and piston cylinder is located in housing and coaxially set with housing
Put, form annular channel between piston cylinder and housing, piston cylinder horizontally disposed V-shaped is in front end and openend is after
End, the rear end of piston cylinder connect with front end for cylindrical shape and rear end, along the circumferential direction offered in the side wall of piston rear end multiple
Slotted eye, the front end of piston be located in piston cylinder and by drive mechanism in piston cylinder along the longitudinal direction it is mobile make annular channel with
The gas outlet connection of housing rear end disconnects.Although above-mentioned prior art can effectively reduce resonance, noise is reduced, it is not
To making corresponding structure improvement and function declaration suitable for the transmission of high-temperature gas material.
Applicant does not have found there be the document report close with the application in patent database at home by retrieval.
The content of the invention
It is an object of the invention to provide a kind of sealing device of piston valve and its application, is fitted using the piston valve of the present invention
For the flow control to gaseous material (especially high-temperature gas).
The overall technology of the present invention is conceived：
The sealing device of piston valve, including offer the housing of inlet and outlet, be axially fixed in the piston in housing
Cylinder, coaxial package be matched with piston cylinder and with its use dynamic sealing be oriented to coordinate divide gas piston, divide the front portion of gas piston outer
The outlet inside wall of side and housing coordinates the gas path on-off and inflow-rate of water turbine inside and outside control housing by dynamic sealing；Piston cylinder is with dividing gas to live
Between plug and the dynamic sealing divided between gas piston and housing uses MULTILAYER COMPOSITE sealing pair, described MULTILAYER COMPOSITE sealing pair bag
The ring packing cylinder for being arranged between sealing surface and being adapted to it is included, vertically every being arranged at ring packing cylinder inner and outer surfaces
First sealing ring, the second sealing ring, coordinated between the first sealing ring, the second sealing ring and sealing surface using gap or transition is matched somebody with somebody
Close, the first described sealing ring and the second sealing ring are made using high temperature resistant composite.
Application of the sealing device of piston valve in control piston valve is transmitted for Gaseous materials.
Applicant it should be noted that：
As the required technical knowledge and skillses content of sealing material field those of ordinary skill, encapsulant should generally possess following spy
Property：First, compactness is good, leaking medium is not easy；Second, there are appropriate mechanical strength and hardness；Third, have in working media good
Good chemical stability, there is certain tolerance to the hydraulic oil in equipment and lubricating oil, it is non-swelling, do not shrink, do not soften,
It is non-sclerous；Fourth, compressibility and resilience are good, permanent deformation is small, can eliminate the gap caused by piston or piston rod bias；
Fifth, there is certain Acclimation temperature ability, do not soften under high temperature, do not decompose, non-sclerous, not embrittlement under low temperature；Sixth, corrosion resistance
Can be good, the energy long-term work in the media such as acid, alkali, oil, its volume and firmness change are small, and are not adhere on metal surface；Seven
It is that coefficient of friction is small, wearability is good；Eigth, the flexibility and elasticity that are combined with sealing surface are good；Ninth, ozone resistance and resistance to ag(e)ing
It is good, it is durable in use；Tenth, easily manufactured, cheap, materials are easily.Encapsulant with resistance to elevated temperatures is in encapsulant
Field has more document report to sell commodity, including but be not limited to soft graphite, celion, ceramic fibre etc.
For the main material for making raw material, can flexibly be selected according to the requirement of the environment temperature of application, applicant is to its structure composition composition
And source repeats no more.
Slide, can also pass through to avoid the first sealing ring, the second sealing ring and sealing surface from coordinating tension to influence piston
The mode that lubricating grease (being commonly called as viscous oil) is scribbled between the first sealing ring, the second sealing ring and sealing surface rubs and avoided to reduce
Loss, improve the flexibility of operating.
The particular technique design of the present invention also has：
To improve the reliability in running, the abrasion caused by encapsulant longtime running, preferable technology are reduced
Scheme is that the first sealing ring and the second sealing ring use the high temperature resistant composite with self-lubricating function to make.Due to
The high temperature resistant composite of self-lubricating function is mainly used to make the friction means of oil-free lubrication, is acted as applied to lubricant grease difficulty
Harsh operating mode is difficult to compensate in the machinery of grease.Can be flexible according to the gaseous environment characteristic conveyed in the present invention
From above-mentioned material, wherein more preferable technical implementation way is, have the high temperature resistant composite of self-lubricating function optional
With the composite including but not limited to using soft graphite as primary raw material.
For further realize piston cylinder and divide between gas piston sealing, piston is played preferably heat transfer and support make
It is axially spaced between the first described sealing ring to be provided with piston ring with, preferable technical implementation way.The system of piston ring
Make material preferably using one kind in gray cast iron, spheroidal graphite cast-iron, alloy cast iron, vermicular cast iron.
The main function of guidance tape is that guiding piston moves along a straight line, and prevents piston wanders off caused by unbalance stress from causing
Interior leakage and reduction seal durability, preferable technical implementation way is, positioned at dividing the of gas piston and piston cylinder sealing surface
It is axially spaced between one sealing ring to be provided with guidance tape.Guidance tape uses the high temperature resistant material with self-lubricating function to make.
As the required technical knowledge and skillses content of those of ordinary skill in the art, the service life of guidance tape and piston ring directly affects
To the using effect and life-span of piston seal and piston rod packing, so the material requirements to guidance tape and piston ring is also higher,
Such as coefficient of friction is small, hardness is high, service life is grown etc..
Selection as guidance tape material in the present invention mainly should also be considered its applied to unlubricated (dry environment),
High temperature resistant, erosion-resisting working environment, material should possess good toughness, chemical stability it is good, it is good with the compossibility of lubricating oil and
Oil resistivity superior properties, preferable technical implementation way are making material selection polytetrafluoroethylene (PTFE), the polyamides of described guidance tape
One kind in imines, polyether-ether-ketone, polyformaldehyde, polyphenylene sulfide.
For ease of the assembling of ring packing cylinder parts corresponding to piston valve, easy to disassemble and maintenance, while meet zero
The reliability that part coordinates, preferable technical implementation way is, positioned at piston cylinder and before dividing the ring packing cylinder between gas piston
End uses fixing assembling with piston cylinder front end, is adopted positioned at the ring packing cylinder front end between gas piston and housing is divided with housing forward end
Use fixing assembling.The technical implementation way being more highly preferred to is that described fixing assembling is fixed using bolt.
Positioning for ease of above-mentioned fixing assembling is relatively reliable, and the technical implementation way being more highly preferred to is described fixation
Assembling uses the bolt under seam positioning states to fix.
For ease of realizing the installation of the first sealing ring and fixation, it is easy to the dismounting and maintenance of parts, preferable technology reality
Existing mode is that the first described sealing ring clamps the embedded rear and front end for being matched with ring packing tube inner surface respectively, and first is close
Its axially position is realized by pressure ring on the outside of seal.
Applicant it should be noted that：
In the description of the invention, term " interior ", " outer ", " axial direction ", " radial direction ", " front portion ", " outside ", " front end ", " after
The orientation or position relationship of the instructions such as end " are based on orientation shown in the drawings or position relationship, are for only for ease of simplified description
The present invention, rather than instruction or imply signified device or element must have specific orientation, with specific azimuth configuration and
Operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for describing purpose, and can not
It is interpreted as indicating or implying relative importance.
Possessed substantive distinguishing features of the present invention and the notable technological progress obtained are：
1st, the ingenious reference of the present invention combines the sealing principle such as including labyrinth sealing, the resistant to elevated temperatures sealing of reasonable selection
Material, the main composition knot of the first sealing ring, the second sealing ring as MULTILAYER COMPOSITE sealing pair from axially spaced setting
Structure, and the first sealing ring, the second sealing ring are used and made with resistance to elevated temperatures composite, are meeting what piston action was realized
Under the premise of, by the multi-stage sealed reliability for improving sealing, efficiently solve existing piston valve sealing material resistance to elevated temperatures
Difference and can not be applied to be applied to gas (especially high-temperature gas) conveying control technical barrier.
2nd, the structure design and material selection of piston ring, while sealing reliability is further improved, not only piston
Provide effective support, while preferably deliver because of heat caused by during piston movement.
3rd, the structure design and material selection of guidance tape, preferably can guide piston to move along a straight line, prevent piston because
Being wandered off caused by unbalance stress causes interior leakage and reduction seal durability.
4th, the structure design and installation form of ring packing cylinder, can not only make the present invention be easily achieved standardized production,
And it is easy to the detachable maintaining of Fast Installation and parts.
5th, ring packing cylinder front end uses the structure design of fixing assembling with piston cylinder and housing forward end, is easy to sealing pair
Dismounting and maintenance.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the structural representation of the MULTILAYER COMPOSITE sealing pair divided in the present invention between gas piston and piston cylinder.
Fig. 3 is the structural representation of the MULTILAYER COMPOSITE sealing pair divided in the present invention between gas piston and housing.
Reference in accompanying drawing is as follows：
1st, ring packing cylinder；2nd, gas piston is divided；3rd, housing；4th, the first sealing ring；5th, the second sealing ring；6th, piston ring；7、
Guidance tape；8th, pressure ring；9th, piston cylinder.
Embodiment
The present invention is described further with reference to embodiments, but should not be construed as limitation of the invention, the present invention
Protection domain be defined by the content that claim is recorded, any equivalent technical elements made according to specification are replaced,
Protection scope of the present invention is not departed from.
The sealing device of piston valve, including offer the housing 3 of charging aperture and discharging opening, be axially fixed in housing 3
Piston cylinder 9, coaxial package be matched with piston cylinder 9 and with its use dynamic sealing be oriented to coordinate divide gas piston 2, divide gas piston
2 front outsides coordinate the gas path on-off and inflow-rate of water turbine inside and outside control housing 3 with the discharging opening inwall of housing 3 by dynamic sealing；
Piston cylinder 9 and the dynamic sealing divided between gas piston 2 and divide between gas piston 2 and housing 3 use MULTILAYER COMPOSITE sealing pair, described
MULTILAYER COMPOSITE sealing pair include the ring packing cylinder 1 that is arranged between sealing surface and is adapted to it, it is axially spaced to be arranged at
The first sealing ring 4, the second sealing ring 5 of the inner and outer surfaces of ring packing cylinder 1, the first sealing ring 4, the second sealing ring 5 and sealing surface
Between coordinated using gap or interference fits, it is main that the first described sealing ring 4 and the second sealing ring 5, which are used using soft graphite,
The encapsulant of raw material makes.
Slide, can also lead to avoid the first sealing ring 4, the second sealing ring 5 from coordinating tension to influence piston with sealing surface
Cross between the first sealing ring 4, the second sealing ring 5 and sealing surface scribble the mode of lubricating grease (being commonly called as viscous oil) reduce friction and
Avoid being lost, improve the flexibility of operating, because it belongs to prior art, applicant will not be repeated here.
It is axially spaced between the first described sealing ring 4 to be provided with piston ring 6.The making material of piston ring uses spheroidal graphite
Cast iron.
Axially spaced between gas piston 2 and the first sealing ring 4 of the sealing surface of piston cylinder 9 guidance tape 7 is provided with positioned at dividing.
Guidance tape 7 is made using polytetrafluoroethylene (PTFE).
Fixing assembling is used with the front end of piston cylinder 9 positioned at piston cylinder 9 and the front end of ring packing cylinder 1 divided between gas piston 2,
Used positioned at the front end of ring packing cylinder 1 between gas piston 2 and housing 3 is divided with the front end of housing 3 under seam positioning states
Bolt is fixed.
The first described sealing ring 4 clamps the embedded rear and front end for being matched with the inner surface of ring packing cylinder 1 respectively, and first is close
The outside of seal 4 its axially position is realized by pressure ring 8.
Claims (11)
1. the sealing device of piston valve, including offer the housing (3) of inlet and outlet, be axially fixed in housing (3)
Piston cylinder (9), coaxial package be matched with piston cylinder (9) and with its use dynamic sealing be oriented to coordinate divide gas piston (2), divide gas
The front outsides of piston (2) and the outlet inside wall of housing (3) by dynamic sealing coordinate gas path on-off inside and outside control housing (3) and
Inflow-rate of water turbine；It is characterized in that piston cylinder (9) and dividing between gas piston (2) and dividing and be between gas piston (2) and housing (3) dynamic close
Envelope uses MULTILAYER COMPOSITE sealing pair, and described MULTILAYER COMPOSITE sealing pair includes the annular for being arranged between sealing surface and being adapted to it
Sealing drum (1), axially spaced the first sealing ring (4), the second sealing ring for being arranged at ring packing cylinder (1) inner and outer surfaces
(5), the first sealing ring (4), the second sealing ring (5) between sealing surface using gap coordinate or interference fits, described first
Sealing ring (4) and the second sealing ring (5) are made using high temperature resistant composite.
2. the sealing device of piston valve according to claim 1, it is characterised in that described high temperature resistant composite is tool
There is the high temperature resistant composite of self-lubricating function.
3. the sealing device of piston valve according to claim 1, it is characterised in that edge between described the first sealing ring (4)
Axially spaced-apart is provided with piston ring (6).
4. the sealing device of the piston valve according to claim 1 or 3, it is characterised in that positioned at dividing gas piston (2) and piston
Axially spaced between first sealing ring (4) of cylinder (9) sealing surface to be provided with guidance tape (7), guidance tape (7) is using with profit certainly
The high temperature resistant material of sliding function makes.
5. the sealing device of piston valve according to claim 3, it is characterised in that the making material of described piston ring (6)
From one kind in gray cast iron, spheroidal graphite cast-iron, alloy cast iron, vermicular cast iron.
6. the sealing device of piston valve according to claim 4, it is characterised in that the making material of described guidance tape (7)
From one kind in polytetrafluoroethylene (PTFE), polyimides, polyether-ether-ketone, polyformaldehyde, polyphenylene sulfide.
7. the sealing device of the piston valve according to any one of claim 1 or 3, it is characterised in that positioned at piston cylinder (9)
Fixing assembling is used with dividing ring packing cylinder (1) front end between gas piston (2) and piston cylinder (9) front end, positioned at dividing gas piston
(2) ring packing cylinder (1) front end between housing (3) uses fixing assembling with housing (3) front end.
8. the sealing device of described piston valve according to claim 7, it is characterised in that described fixing assembling uses
Bolt is fixed.
9. the sealing device of the described piston valve according to any one of claim 7 or 8, it is characterised in that described consolidates
Fixed assembling uses the bolt under seam positioning states to fix.
10. the sealing device of the piston valve according to any one of claim 1 or 3, it is characterised in that described first is close
Seal (4) clamps the embedded rear and front end for being matched with ring packing cylinder (1) inner surface respectively, passes through on the outside of the first sealing ring (4)
Pressure ring (8) realizes its axially position.
11. the sealing device of the piston valve according to claim any one of 1-10 is transmitting control piston for Gaseous materials
Application in valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967385.2A CN107504205A (en) | 2017-10-17 | 2017-10-17 | The sealing device of piston valve and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967385.2A CN107504205A (en) | 2017-10-17 | 2017-10-17 | The sealing device of piston valve and its application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107504205A true CN107504205A (en) | 2017-12-22 |
Family
ID=60700637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710967385.2A Pending CN107504205A (en) | 2017-10-17 | 2017-10-17 | The sealing device of piston valve and its application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107504205A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005048622A1 (en) * | 2005-10-11 | 2007-04-19 | Festo Ag & Co | Piston with plastic body for valve controling fluid flow comprises two coaxial beaker shaped moldings joined together by material at the facing open ends |
| CN102278475A (en) * | 2011-06-15 | 2011-12-14 | 浙江大学 | Dynamic sealing structure for reciprocating movement shaft between high temperature gas and high temperature liquid |
| CN103047476A (en) * | 2011-10-15 | 2013-04-17 | 江苏神通阀门股份有限公司 | Split piston axial-flow type regulating valve |
| CN104196714A (en) * | 2014-09-05 | 2014-12-10 | 江苏宏业石油装备科技有限公司 | Dynamic sealing combined plunger assembly for oil field plunger oil well pump |
| CN204187101U (en) * | 2014-09-17 | 2015-03-04 | 安徽铜都流体科技股份有限公司 | High stability piston flow-adjustable valve |
| CN204267731U (en) * | 2014-12-02 | 2015-04-15 | 襄阳中铁宏吉工程技术有限公司 | Sealing configuration between a kind of multilevel difunctional hydraulic cylinder piston and cylinder barrel |
| CN207437800U (en) * | 2017-10-17 | 2018-06-01 | 石家庄三环阀门股份有限公司 | The sealing device of piston valve |
-
2017
- 2017-10-17 CN CN201710967385.2A patent/CN107504205A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005048622A1 (en) * | 2005-10-11 | 2007-04-19 | Festo Ag & Co | Piston with plastic body for valve controling fluid flow comprises two coaxial beaker shaped moldings joined together by material at the facing open ends |
| CN102278475A (en) * | 2011-06-15 | 2011-12-14 | 浙江大学 | Dynamic sealing structure for reciprocating movement shaft between high temperature gas and high temperature liquid |
| CN103047476A (en) * | 2011-10-15 | 2013-04-17 | 江苏神通阀门股份有限公司 | Split piston axial-flow type regulating valve |
| CN104196714A (en) * | 2014-09-05 | 2014-12-10 | 江苏宏业石油装备科技有限公司 | Dynamic sealing combined plunger assembly for oil field plunger oil well pump |
| CN204187101U (en) * | 2014-09-17 | 2015-03-04 | 安徽铜都流体科技股份有限公司 | High stability piston flow-adjustable valve |
| CN204267731U (en) * | 2014-12-02 | 2015-04-15 | 襄阳中铁宏吉工程技术有限公司 | Sealing configuration between a kind of multilevel difunctional hydraulic cylinder piston and cylinder barrel |
| CN207437800U (en) * | 2017-10-17 | 2018-06-01 | 石家庄三环阀门股份有限公司 | The sealing device of piston valve |
Non-Patent Citations (1)
| Title |
|---|
| 文联奎等: "《石油化工厂设备检修手册》", vol. 1, 大连海事大学出版社, pages: 113 - 35 * |
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