CN103062416A - Single-seat flexible seal valve device - Google Patents
Single-seat flexible seal valve device Download PDFInfo
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- CN103062416A CN103062416A CN201210565693XA CN201210565693A CN103062416A CN 103062416 A CN103062416 A CN 103062416A CN 201210565693X A CN201210565693X A CN 201210565693XA CN 201210565693 A CN201210565693 A CN 201210565693A CN 103062416 A CN103062416 A CN 103062416A
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Abstract
The invention discloses a single-seat flexible seal valve device which comprises a valve body, a valve seat with an annular structure, a pressing sleeve, a first sealing element, a valve core component, a valve rod, an upper valve deck, a guide sleeve and a second sealing element. The valve body is provided with a fluid inlet and a fluid outlet of a large S-shaped flow channel; the valve seat radially and finely moves in the valve body; the first sealing element is arranged between the valve seat and the valve body; the pressing sleeve is arranged in the valve body; the valve core component further comprises a valve core, an elastic supporting piece and a soft sealing ring, the elastic supporting piece and the soft sealing ring are arranged in a groove of the valve core, and the soft sealing ring is supported by the elastic supporting piece; the valve rod is connected with the valve core component; the upper valve deck is arranged at the position of an opening at the upper end of the valve body; the guide sleeve is inlaid in the upper valve deck and provides good guiding for the valve core component; and the second sealing element is pressed in the valve body by the upper valve deck, the valve seat and the valve core form an angle seal, a valve seat surface and the soft sealing ring are elastically sealed, and a part of forces which the valve core applies to the valve seat is directly transmitted to the valve seat when the valve core and the valve seat are finally in a closed position state so that the soft sealing ring can be prevented from being damaged by overloading.
Description
Technical field
The present invention relates to the technical field of modulating valve, particularly a kind of single seat soft seal modulating valve of regulating cut-off type.
Background technique
Pneumatic diaphragm control valve is a kind of regulating controller in the pneumatic unit combination instrument, to produce to carry out one of important devices in the process automatic regulating system, it is accepted the output signal of regulation meter and closes and Open valve, reach the isoparametric automatic adjusting of pressure, temperature, flow and liquid level, can be widely used in automatic adjusting and the telecontrol of chemical industry, oil, metallurgy, electric power, light textile industry.At present, pneumatic diaphragm control valve commonly used mainly is comprised of modulating valve and actuator, and the push rod that links to each other by the centre between the two connects.Modulating valve is a kind of machinery of controlling fluid motion, traditional modulating valve comprises valve body, valve core head, valve core rod, valve seat etc., this valve body has inner chamber, this inner chamber is separated to form a upper runner and a lower flow channel by the valve core head in the valve hole part, separating the place, valve core head and valve seat are flexibly connected, and adopt valve core rod to control the flow of fluid in the section area size of valve inner action change valve seat and valve core head cooperation place; The perhaps movement of spool in the valve body inner flow passage realizes the unlatching of valve or closes.Single seat soft seal modulating valve is a kind of in the modulating valve, is used for the fluid of regulating fast, cutting off the pipeline medium, and guarantees leakage class.
Tianjin hundred sharp exhibitions are sent out Group Co.,Ltd and have been applied for that on 09 29th, 2011 a denomination of invention is washout-preventing soft-sealing single-seat regulating valve, application number is 201110300175.0 patent, this invention relates to a kind of washout-preventing soft-sealing single-seat regulating valve, comprise valve body, valve gap, valve seat, the soft seal packing ring, valve rod and spool, valve body is connected connection with valve gap, the coaxial installation spool in valve rod lower end in valve body, the coaxial valve seat that is fixed with on the valve body between spool bottom and the valve body, between this valve seat and the valve body sealing is installed, be fixed with the soft seal packing ring in the spool outer rim that contacts with valve seat, spool forms by this soft seal packing ring and valve seat and is sealed and matched, the driving of spool by valve rod realizes adjusting and the keying of valve, the coaxial flow guiding dummy club ring that is shaped with on the spool of spool bottom and the soft seal packing ring lower end surface of valve seat contact position.This modulating valve can avoid medium to directly the washing away of nonmetal sealing surface, and especially effect is more obvious under the higher differential pressure operating mode, can effectively prolong the working life of valve.
See also Figure 1A to Fig. 1 C, it is the example principle assumption diagram of existing a kind of single seat soft seal modulating valve.Figure 1A is the whole sectional view of single seat soft seal modulating valve, and Figure 1B is the spool of close control valve unit and the partial enlarged view of valve base sealing; Fig. 1 C is the guide structure partial enlarged view of close control valve unit.Single seat soft seal modulating valve comprises loam cake 18, valve body 15, spool, gland 16, guide structure 17 etc.Guide structure 17 is arranged in the bonnet, for valve hole part provides good guiding.Above-mentioned valve is used for the final controlling element of process industry automatic field control system, and the control unit fluid is carried out quick adjustment, cut-off type control, reaches the control that control system is carried out technological process with this.
Yet there is following defective in existing single seat soft seal modulating valve:
1. when valve was in closed condition, the surface of valve seat 19 was so that soft seal ring 13(soft seal ring material is teflon) produce distortion, valve seat 19 surfaces are close in the elastic material distortion at this place, guarantee thus sealing.But this structure is difficult to limit the size of the power of closing.Even when spool soft seal ring 13 touches valve seat 19, closing motion can not in time stop, thereby make elastic material permanent deformation easily occur, especially be in for a long time when closing when valve, spool soft seal ring 13 is subject to overload pressure for a long time and makes it permanent deformation occur, just easily loses efficacy when closing after the unlatching again.
2. in the valve opening process, because the throttling action of spool 12, so that the flow at high speed of medium appears in valve within the firm short time of opening, soft seal this moment ring 13 will bear very large Pressure Drop, this will produce erosion to soft seal ring 13 surfaces, cause the rapid destruction on its surface.
3. this structure is also having great defective aspect assembling, dismounting and the maintenance.At first soft seal ring 13 is to tighten by valve core head 14 and screw 11 to be embedded in the valve core rod 12, in order to guarantee that screw 11 does not get loose, usually will coat the suitable method set screws 11 such as curing glue at screw 11 when assembling, this brings great inconvenience when just giving again dismounting and change soft seal ring 13.
4. the guiding element of this structure is cast member, and complex structure, volume are large, heavier, unsuitable seriation, and with high costs.
5. this structure only adopts the primary seal auxiliary structure, can not satisfy media environment under the harsh conditions.
Summary of the invention
The first purpose of the present invention is to provide a kind of single seat soft sealing valve device, adopts the primary seal auxiliary structure to solve prior art, can't reach convection cell and accurately control, and namely reaches the technical problem that tight envelope requires.
A kind of single seat soft sealing valve device comprises:
Valve body, its fluid input with a large S-shaped runner is with fluid output;
The valve seat of loop configuration, its at valve block internal diameter to fine motion;
The first Sealing, it is arranged between valve seat and the valve body;
Gland is arranged on valve inner;
Valve hole part, it further comprises spool, elastic supporting member for supporting optical member, soft seal ring, and described elastic supporting member for supporting optical member and soft seal ring are arranged in the spool groove, and described soft seal ring arranges support by elastic supporting member for supporting optical member;
Valve rod, it is connecting valve hole part;
Bonnet, it is arranged on valve body upper end open place;
Guide sleeve is embedded in the bonnet, for valve hole part provides good guiding; Driving whole valve hole part with this moves axially in guide sleeve;
The second Sealing, it is pressed in the valve body by bonnet,
The sealing of described valve seat and spool angulation, described valve seat surface and the sealing of soft seal ring resilience, and spool and valve seat reach under the last closed position state, and spool directly passes to valve seat to the part power of valve seat, damages because of overload with eliminating soft seal ring.
Preferably: offer the circulation passage that is conducive to the smooth circulation of fluid on the described gland.Described circulation passage is included in symmetrical rectangular window or the opening that the fluid that is provided with a plurality of symplex structures on the described gland passes through.
Compared with prior art, the present invention has following advantage:
The first " sealing pair employing valve seat and the sealing of spool metal angle and valve seat surface and design of soft seal ring resilience sealing double-sealing.The valve seat metallic sealing section can play a supportive role, and prevents that the soft seal ring is excessive and crushed because of pressure.The soft seal ring is supported and is subject to the protection of spool by elastic supporting member for supporting optical member, spool has been exempted the danger of soft seal ring overload, and the assurance valve can be accomplished the sealing of VI level.
In the moment that valve has just been opened, because medium produces faster flow velocity, the vibration that this can cause Sealing makes sealing material fatigue ruption occur at sealing outer rim place.Owing to being subject to the protection of spool, the soft seal ring can not be subjected to washing away of fluid, and is not fragile in the new structure.For the flowing medium of impurity, this novel soft sealing valve sealing configuration advantage is very outstanding.This mainly is because in the medium when being entrained with solid impurity, between the as easy as rolling off a log sealing surface that is stuck in spool and valve seat, has hindered the sealing of valve seat, can cause leakage, then washes away and makes valve base surface by erosion attack owing to the high speed of medium.For above-mentioned soft seal ring sealing configuration with secondary closing function, be stuck between spool and the valve seat metallic sealing section even this impurity occurred, also have the sealing between valve seat surface and the soft seal ring, still can play reliable and effective seal action.
When whole system generation medium fire, this novel soft sealing valve structure has fire-proof function, and in the situation that the soft seal element is burned, spool and valve seat still can guarantee reliable sealing.
The second, the guide sleeve of valve inner, this guide sleeve structure is simple, is embedded in the loam cake, guarantees the guide function of spool in course of action, can satisfy the material requirement of different medium demand, has greatly saved valve to manufacture cost.Namely
Guide sleeve is provided with at least two step cylindricals, large cylindrical and bonnet lower end endoporus adopt interference fit, to use oil hydraulic press that guide sleeve is pressed into the bonnet endoporus, carry out spot welding or rush the riveting reinforcing at its cooperation ring edge afterwards, so that guide sleeve firmly is fixed on bonnet inside; Axially be provided with the equalizing orifice that at least two fluids pass through at guide sleeve.After spool and guide sleeve assembling, convenient Bas Discharged with guide sleeve and bonnet enclosed space is beneficial to the spool guiding steadily.It is very distinct that the function of guide sleeve is given in this design, only needs to guarantee reliable spool guiding.
From the structure of whole control valve unit, the present invention is fairly simple, and is quick detachable, easy care, reliable performance etc.
Description of drawings
Figure 1A is according to the sectional view with the most close single seat soft sealing valve device of the present invention;
Figure 1B is the spool of close control valve unit and the partial enlarged view of valve base sealing;
Fig. 1 C is the guide structure partial enlarged view of close control valve unit;
Fig. 2 is the sectional view according to the novel single seat soft sealing valve device of the embodiment of the invention;
Fig. 3 is the spool of control valve unit of the present invention and the partial enlarged view of valve base sealing;
Fig. 4 is guide sleeve structure figure of the present invention;
Fig. 5 is the second guide structure partial enlarged view of the present invention.
Embodiment
Describe the present invention with reference to the accompanying drawings:
In order to reach purpose of the present invention, the invention provides a kind of design proposal of novel single seat soft sealing valve device.
See also Fig. 2 to Fig. 5, novel single seat soft sealing valve device includes:
Valve body 27, its fluid input with a large S-shaped runner is with fluid output;
The valve seat 24 of loop configuration, it is radially arbitrarily fine motion in valve body 27;
The first Sealing 25, it is arranged between valve seat 24 and the valve body 27;
Valve rod, it is connecting valve hole part 26;
Bonnet, it is arranged on valve body 27 upper end open places;
The second Sealing 21, it is pressed on flange inner bore of step place in the valve body by bonnet.
Fig. 2 has provided the structural drawing of the novel single seat soft sealing valve device of the embodiment of the invention.
Valve body 27 is made by forging type, its fluid input with a large S-shaped inner chamber runner is with fluid output, fluid input is kept apart by a partition with fluid output, a seat ring 24, its radially fine motion all around in valve body 27 partitions in the assembling process, finally compressed by a gland 23, gland 23 is arranged between the loam cake and partition for the closed valve upper end open, has on the gland 23 and is beneficial to the smoothly symmetrical rectangular window 36 of circulation of fluid.Loam cake and valve body connecting end inside are provided with and are beneficial to up and down straight-line guide sleeve 22 of valve hole part 26 works, and the material of this guide sleeve 22 is than the high grade of material of spool.
Here valve hole part is carried out following description (seeing also again Fig. 3), whole valve hole part 26 comprises that spool 33, elastic supporting member for supporting optical member 31, soft seal ring 32(material are for strengthening teflon) assembling, elastic supporting member for supporting optical member 31 and soft seal ring 32 can be embedded in spool 33 grooves, certainly also not necessarily be arranged on and be embedded in spool 33 grooves, but this design of this example can bring no small benefit.Elastic supporting element 31 of the present invention and soft seal ring are embedded in the spool groove, have effectively protected elastic supporting member for supporting optical member 31 and soft seal ring not by the medium erosion, have improved the poor ability of resistance to compression of soft seal element.Simultaneously, when controlled medium breaking out of fire, when the soft seal element was burned, the metal sealing of spool and valve base chamber still can seal, and guaranteed the safety of the tooling of this valve control.
This structure of the present invention, sealing pair adopt valve seat 24 and the sealing of spool 33 metal angles and 24 of valve seats and the design of soft seal ring 32 elastic packing double-sealings.One groove ring is set on the spool 33, it is the above-mentioned spool groove of mentioning, elastic supporting member for supporting optical member 31 and soft seal ring 32 are just within it accommodating, the bottom surface of soft seal ring 32 and valve seat 24 connect, and elastic supporting member for supporting optical member 31 is to have flexiblely, can support the tightness that this soft seal ring 32 and valve seat 24 connect.The side of valve seat 24 and spool 33 connect, and form a close contact face, reach thus the effect of sealing.That is, metal sealing valve seat 24 can play a supportive role, and prevents that soft seal ring 32 is excessive and crushed because of pressure.Soft seal ring 32 is supported and is subject to the protection of spool 33 by elastic supporting member for supporting optical member 31; such design advantage is when spool 33 and valve seat 24 reach last closed position; spool 33 directly passes to valve seat 24 for the part power of valve seat 24; damage because of overload with regard to having got rid of soft seal ring 32 like this, the assurance valve can be accomplished the sealing of VI level.This double-sealing design has improved the reliability of sealing greatly, has realized regulating the tight envelope requirement of cut-off type modulating valve.
For the medium that contains impurity, between the as easy as rolling off a log sealing surface that is stuck in spool 33 and valve seat 24, hindered the sealing of valve seat 24.This novel soft sealing structure of the present invention is stuck between spool 33 and the valve seat 24 metal sealing positions even this impurity occurred, also has the sealing between valve seat 24 planes and the soft seal ring 33, can guarantee that still sealing is reliable.
In Fig. 2, valve seat 24 is directly pushed down on valve body 27 vertical directions in the lower end of gland 23, and first Sealing 25 of the lower end of valve seat 24 by a flexibility is assemblied in the port hole that is formed on partition central authorities.The upper end of gland 23 is arranged on the middle flange inside of valve body 27, flange design has an inner bore of step in the valve body 27, so that gland 23 be placed on valve body 27 interior after, form the interior annulus of a different size size at middle flange opening, in interior annulus, placed the second Sealing 21 of a rigidity.The lower end of loam cake is processed to the round platform of two different cylindrical sizes, loam cake is assembled to valve body 27 upper ends after, loam cake is compressed to the second Sealing 21 of the first Sealing 25 in the valve body and middle flange opening the deformation state of design code.At this moment, valve body upper end open place has just guaranteed that because of the distortion of the second Sealing 21 fluid that do not have at valve body upper end open place leaks.Simultaneously, be depressed into the state of plastic deformation of designing requirement because of the first Sealing 21, the inlet fluid of valve body 27 can not leak into through this part the outlet end of valve body, namely can leakage phenomenon not occur in control valve unit inside.By the seal process of whole valve, this design is not too high to the dimension precision requirement of gland 23, because flexible Sealing being arranged in the dimensional chain of the whole clack box of control inside, effectively reduces the machining accuracy requirement of gland.
By above description, the single seat soft sealing valve device of this structure effectively raises the reliability of conventional single seat soft sealing valve.
In conjunction with Fig. 2, offer the circulation passage that is conducive to the smooth circulation of fluid on the gland 23.Such as shown in Figure 4, be provided with the fluid of a plurality of symplex structures at gland 23 its outer circle walls by rectangular window 36.Be provided with on loam cake and be beneficial to up and down straight-line guide sleeve 22 of valve hole part (spool, elastic supporting member for supporting optical member, soft seal ring) work, guide sleeve 22 is simple in structure, and it is connected by interference fit with loam cake.In order to guarantee its reliable guiding, usually can rush riveting or spot welding at itself and loam cake matched edges.On valve mechanism, the guiding of 22 pairs of spools 33 of guide sleeve is very important.In order to satisfy reliable guiding, usually need harder material, in order to reach this requirement, this simple structure of the present invention is very easily carried out guide sleeve surface treatment or heat treatment.And the material of guide sleeve 22 can be carried out assembly according to process conditions.The design bright spot of this structure is when satisfying guide function, and the machine of having saved fully adds, manufacture cost and cost of material.
See also Fig. 5, in this technological scheme, also have the another kind of project organization that substitutes, mainly be for the gland in the invention, the structure of this part and original technological scheme are similar, and gland can adopt circumference to spile and 37 substitute circumference and open rectangular window, the same the present invention of other structures.
A kind of control valve unit, at least comprise valve seat and spool part, the spool part further comprises spool, elastic supporting member for supporting optical member, soft seal ring, described soft seal ring arranges support by elastic supporting member for supporting optical member, the sealing of described valve seat and spool angulation, described valve seat surface seals with the soft seal ring resilience, and spool and valve seat reach under the last closed position state, spool directly passes to valve seat to the part power of valve seat, damages because of overload to get rid of the soft seal ring.Described elastic supporting member for supporting optical member and soft seal ring are arranged in the spool groove.
The preferred embodiment of the present invention just is used for helping to set forth the present invention.Preferred embodiment does not have all details of detailed descriptionthe, does not limit this invention yet and only is described embodiment.Obviously, according to the content of this specification, can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to explain better principle of the present invention and practical application, thereby the technical field technician can utilize the present invention well under making.The present invention only is subjected to the restriction of claims and four corner and equivalent.
Claims (9)
1. a single seat soft sealing valve device is characterized in that, comprising:
Valve body, its fluid input with a large S-shaped runner is with fluid output;
The valve seat of loop configuration, its at valve block internal diameter to fine motion;
The first Sealing, it is arranged between valve seat and the valve body;
Gland is arranged on valve inner;
Valve hole part, it further comprises spool, elastic supporting member for supporting optical member, soft seal ring, and described elastic supporting member for supporting optical member and soft seal ring are arranged in the spool groove, and described soft seal ring arranges support by elastic supporting member for supporting optical member;
Valve rod, it is connecting valve hole part;
Bonnet, it is arranged on valve body upper end open place;
Guide sleeve is embedded in the bonnet, for valve hole part provides good guiding; Driving whole valve hole part with this moves axially in guide sleeve;
The second Sealing, it is pressed in the valve body by bonnet,
The sealing of described valve seat and spool angulation, described valve seat surface and the sealing of soft seal ring resilience, and spool and valve seat reach under the last closed position state, and spool directly passes to valve seat to the part power of valve seat, damages because of overload with eliminating soft seal ring.
2. single seat soft sealing valve device as claimed in claim 1 is characterized in that, offers on the described gland to be conducive to the smoothly circulation passage of circulation of fluid.
3. single seat soft sealing valve device as claimed in claim 2 is characterized in that, described circulation passage is included in symmetrical rectangular window or the opening that the fluid that is provided with a plurality of symplex structures on the described gland passes through.
4. single seat soft sealing valve device as claimed in claim 1 is characterized in that, valve seat is directly pushed down on the valve body vertical direction in the lower end of gland, and first Sealing of the lower end of valve seat by a flexibility is assemblied in the port hole that is formed on partition central authorities.
5. such as claim 1 or 4 described single seat soft sealing valve devices, it is characterized in that, the upper end of gland is arranged on the middle flange inside of valve body, flange design has an inner bore of step in the valve body, so that after gland is placed in the valve body, form the interior annulus of a different size size at middle flange opening, in interior annulus, place described second Sealing of rigidity.
6. single seat soft sealing valve device as claimed in claim 5, it is characterized in that, the round platform of two different cylindrical sizes is arranged in the lower end of loam cake, loam cake is assembled to the valve body upper end, and rear loam cake is compressed to predefined deformation state with the second Sealing of the first Sealing in the valve body and middle flange opening.
7. single seat soft sealing valve device as claimed in claim 1, it is characterized in that, guide sleeve is provided with at least two step cylindricals, large cylindrical and bonnet lower end endoporus adopt interference fit, to use oil hydraulic press that guide sleeve is pressed into the bonnet endoporus, carry out spot welding or rush the riveting reinforcing at its cooperation ring edge afterwards, so that guide sleeve firmly is fixed on bonnet inside; Axially be provided with the equalizing orifice that at least two fluids pass through at guide sleeve.
8. control valve unit, at least comprise valve seat and spool part, it is characterized in that, the spool part further comprises spool, elastic supporting member for supporting optical member, soft seal ring, and described soft seal ring arranges support by elastic supporting member for supporting optical member, described valve seat and the sealing of spool angulation, described valve seat surface and the sealing of soft seal ring resilience, and spool and valve seat reach under the last closed position state, and spool directly passes to valve seat to the part power of valve seat, damage because of overload to get rid of the soft seal ring.
9. control valve unit as claimed in claim 8 is characterized in that, described elastic supporting member for supporting optical member and soft seal ring are arranged in the spool groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210565693XA CN103062416A (en) | 2012-12-24 | 2012-12-24 | Single-seat flexible seal valve device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210565693XA CN103062416A (en) | 2012-12-24 | 2012-12-24 | Single-seat flexible seal valve device |
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| CN103062416A true CN103062416A (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210565693XA Pending CN103062416A (en) | 2012-12-24 | 2012-12-24 | Single-seat flexible seal valve device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104401919A (en) * | 2014-11-24 | 2015-03-11 | 杭州中亚机械股份有限公司 | Filling valve |
| CN108916431A (en) * | 2018-09-19 | 2018-11-30 | 中国石油化工股份有限公司胜利油田分公司清河采油厂 | Lift check valve for oil field fuel transfer system |
| CN112610708A (en) * | 2020-12-09 | 2021-04-06 | 浙江大学 | Double-seat type regulating valve and sealing structure and method thereof |
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| US3794295A (en) * | 1972-03-08 | 1974-02-26 | Klinger Ag | Shutoff valve |
| DE2645659A1 (en) * | 1976-10-09 | 1978-04-13 | Gulde Regelarmaturen Kg | Combination elastomer valve seal - has sealing ring with elastic pressure ring underneath held in valve plug groove |
| US6095186A (en) * | 1998-06-05 | 2000-08-01 | Arca Regler Gmbh | Plural valve seating arrangement |
| CN201680055U (en) * | 2009-12-11 | 2010-12-22 | 天津精通控制仪表技术有限公司 | Noise reduction type adjusting valve |
| CN102359611A (en) * | 2011-09-29 | 2012-02-22 | 天津百利展发集团有限公司 | Washout-preventing soft-sealing single-seat regulating valve |
| CN102401143A (en) * | 2010-06-21 | 2012-04-04 | 克朗斯股份公司 | Multi-piece valve disk |
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2012
- 2012-12-24 CN CN201210565693XA patent/CN103062416A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3794295A (en) * | 1972-03-08 | 1974-02-26 | Klinger Ag | Shutoff valve |
| DE2645659A1 (en) * | 1976-10-09 | 1978-04-13 | Gulde Regelarmaturen Kg | Combination elastomer valve seal - has sealing ring with elastic pressure ring underneath held in valve plug groove |
| US6095186A (en) * | 1998-06-05 | 2000-08-01 | Arca Regler Gmbh | Plural valve seating arrangement |
| CN201680055U (en) * | 2009-12-11 | 2010-12-22 | 天津精通控制仪表技术有限公司 | Noise reduction type adjusting valve |
| CN102401143A (en) * | 2010-06-21 | 2012-04-04 | 克朗斯股份公司 | Multi-piece valve disk |
| CN102359611A (en) * | 2011-09-29 | 2012-02-22 | 天津百利展发集团有限公司 | Washout-preventing soft-sealing single-seat regulating valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104401919A (en) * | 2014-11-24 | 2015-03-11 | 杭州中亚机械股份有限公司 | Filling valve |
| CN104401919B (en) * | 2014-11-24 | 2016-03-23 | 杭州中亚机械股份有限公司 | A kind of filling valve |
| CN108916431A (en) * | 2018-09-19 | 2018-11-30 | 中国石油化工股份有限公司胜利油田分公司清河采油厂 | Lift check valve for oil field fuel transfer system |
| CN112610708A (en) * | 2020-12-09 | 2021-04-06 | 浙江大学 | Double-seat type regulating valve and sealing structure and method thereof |
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Application publication date: 20130424 |