CN102913635B - Valve clack, valve core and opening-closing valve - Google Patents
Valve clack, valve core and opening-closing valve Download PDFInfo
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- CN102913635B CN102913635B CN201210430761.1A CN201210430761A CN102913635B CN 102913635 B CN102913635 B CN 102913635B CN 201210430761 A CN201210430761 A CN 201210430761A CN 102913635 B CN102913635 B CN 102913635B
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Abstract
The invention discloses a valve clack, a valve core and an opening-closing valve. The valve clack comprises a valve clack body for closing a pipeline of a valve, and a flow guide sleeve for providing a flowing channel of a medium in a valve body cavity; a first end face of the valve clack body is leveled with a first end face at the same side of the flow guide sleeve to form a contact face of the valve clack; the valve core comprises a left valve clack and a right valve clack; second end faces of flow guide sleeves of the left valve clack and the right valve clack are in sealed connection to form a flow guide channel of the valve core which is communicated with upstream and downstream channels, so that the medium flows through the opening-closing valve through the flow guide channel and does not enter the valve body cavity to corrode other parts; left and right ends of a supporting shaft of a connecting valve rod are respectively and relatively rotatably connected with the valve clack body of the left valve clack and the right valve clack; and the supporting shaft is provided with an elastic piece which is clamped on a second end face between a limiting element and the valve clack body. The contact face of a valve cover of the opening-closing valve and the contact face of the valve clack of the valve core can be sprayed and welded by hard alloy layers, so as to increase the sealing performance and the wear resistance.
Description
Technical field
The present invention relates to valve and valve member, particularly relate to and open and close valve, open and close valve spool and spool flap.
Background technique
In recent years, along with the fast development of the industries such as domestic petroleum, chemical industry, silicon industry, various large-scale plant is investment construction, production in succession throughout the country, and abrasion-proof hard seal valve (mainly abrasion-proof hard seal metal ball valve) is used widely in Coal Chemical Industry and silicon commercial plant, and play key effect to whole device is stable.The applying working condition of this kind of valve carries the particles such as the solid coal dust with certain degree of hardness or silica flour by pressurized gas, when valve carries out switch motion, the solid particle of high-speed motion can cause very large impact and abrasion to the valve body surface of valve, valve seat and its runner, and powder or granule medium to be easy to enter in each gap of valve member especially sealing surface and valve seat and valve body cooperation position, therefore these media are easy to be deposited in seating spring chamber, cause spring failure, cause valve seal inefficacy or valve locking to open and close.
In addition, the valve such as ball valve and plate valve is for ensureing sealing effect and reducing to open and close moment, the valve seat arranged is all can be movable along the runner direction of valve, thus the elastic element making to be arranged on valve seat and Sealing are directly exposed in medium, so just directly shorten the working life of elastic element and Sealing, and indirectly shorten the working life of valve.
Moreover the media such as coal have a feature, if be exactly the smooth or transfixion of coal circulation, will polymerization reaction take place, coking locking.Such as, the cutting-off valve used on direct liquefaction coal slurry pipeline is at present all ball valve, when action need cutting out pipeline, ball valve is closed, coal in spheroid runner and in valve pocket, owing to discharging in time, is deposited on ball chamber and the endoceliac coal of valve just likely medium coking occurs thus valve locking cannot be opened.
Summary of the invention
One object of the present invention is to solve the problem, and provides one and medium can be made cannot to enter valve body cavity, decreases the valve flap of medium to the erosion of miscellaneous part in valve sealing face and valve body cavity.
The technical solution used in the present invention is: a kind of flap, comprise for the flap body of the pipeline of throttle down with for providing medium at the endoceliac flow guide sleeve flowing through passage of valve, described flow guide sleeve both ends open, described flap body is accepted mutually with the outer wall of flow guide sleeve, make flap body for concordant with the end face being positioned at homonymy of flow guide sleeve with the end face that the inwall of valve contacts, form the surface of contact of flap.
Wherein, the surface of contact surfacing of described flap has hard alloy layer.
Wherein, the first end face of described flap body, as concordant with first end face being positioned at homonymy of flow guide sleeve with the end face that the inwall of valve contacts, forms the surface of contact of flap; The inside indentation of the second end face being positioned at homonymy that the second end face opposite flow relative with the first end face of described flap body overlaps.
Wherein, the second end of formation second end face of the flow guide sleeve of described flap is the stepped part radially protruded.
Second object of the present invention is to provide a kind of spool be made up of above-mentioned flap.
The technical solution used in the present invention is: a kind of spool, comprise two above-mentioned flaps, respectively as left and right flap, the second end face seal of the flow guide sleeve of described left and right flap connects, and forms the guide channel for the upstream passageway and downstream passage that are communicated with valve of spool; One limits it with the flap body of left and right flap respectively for the left and right end of the back shaft be connected with the valve rod of valve is connected in relative rotation, described back shaft is provided with left and right bounding means, one left elastic component is arranged between the second end face of the flap body of left limit part and left flap, and a right elastic component is arranged between the second end face of the flap body of right limit part and right flap.
Wherein, the flow guide sleeve of described left and right flap is at the sheathed flap cover of the seam crossing of the two, arrange between second end face of the flow guide sleeve of described left and right flap one flap cover radial direction on by flap cover extruding, flap cover axially by the Sealing that the flow guide sleeve of left and right flap extrudes.
Wherein, the second end of formation second end face of the flow guide sleeve of described flap is the stepped part radially protruded, and described flap cover is sheathed in the stepped part of left and right flap.
Wherein, described left limit part is left adjusting nut, and described left adjusting nut is connected with left section of screw-thread fit of back shaft, to regulate the compression degree of left elastic component.
Wherein, described right limit part is right adjusting nut, and described right adjusting nut is connected with right section of screw-thread fit of back shaft, to regulate the compression degree of right elastic component.
3rd object of the present invention is to provide a kind of keying valve adopting above-mentioned spool.
The technical solution used in the present invention is: a kind of keying valve, as the power plant with valve rod that a kind of valve comprises valve body, two valve gaps and is installed on valve body, described valve gap is provided with passage; Two valve gaps are divided into valve body two ends respectively as left and right valve gap and link together with valve body, make valve body and left and right valve gap surround the valve body cavity opening and closing valve; Pipeline on left and right valve gap communicates with valve body cavity respectively as the upstream and downstream pipeline opening and closing valve;
Described keying valve also comprises above-mentioned spool, and described spool is located between left and right valve gap, and is slidably matched by the surface of contact of left and right flap and the surface of contact of left and right valve gap, and described back shaft is installed on valve rod; Described spool, the requirement of the relative position relation of left and right valve gap is: when power plant drive valve core movement extremely to open and close the close stance of valve by valve rod, left and right flap closes upstream and downstream passage respectively; When power plant drive valve core movement to when opening and closing the opening of valve by valve rod, the guide channel of spool is directly communicated with upstream and downstream passage, makes medium flow through keying valve through guide channel.
Wherein, described back shaft is with can being axially installed on valve rod relative to the mode of valve rod movement at back shaft.
Wherein, the end of described valve rod has a mounting sleeve, and described back shaft and mounting sleeve are connected by key and carry out being connected at the axially relatively-movable of back shaft.
Wherein, described valve body installs a bleeder valve.
Wherein, the inwall of described valve gap has the seal boss around channel setting, the surface of contact of described seal boss has hard alloy layer as the surface of contact surfacing of valve gap, the surface of contact of the first end face of the flap body of left flap and the seal boss of left valve gap is slidably matched, and the surface of contact of the first end face of the flap body of right flap and the seal boss of right valve gap is slidably matched.
Beneficial effect of the present invention is: flap of the present invention is by being designed for the flap body of the passage of throttle down and making for the flow guide sleeve of MEDIA FLOW through valve body cavity at valve open, medium can be avoided the erosion in the sealing surface of valve and valve body cavity being such as elastic component etc., effectively can extend the working life of valve, also valve will be caused to open and close because medium deposits in valve body cavity;
Because flap is relative to valve body, valve handle activity, so valve rod is not by the radial force (radial force along valve rod radial direction) that medium and elastic component produce, phenomenons such as " block, suppress " that valve rod can not occur, so the keying moment of valve is little;
In addition, flap of the present invention, spool and keying valve have the advantage that structural design is simple, reasonable, manufacturing process is simple and cost is low; Valve main seal position, by adopting the process of surfacing hard alloy layer, without nonmetallic material, can have effectively achieved the control overflow to high temperature, band particle, high parameter performance fluid, reach metal sealing zero leakage.
Accompanying drawing explanation
Fig. 1 is a kind of right elevation implementing structure according to flap of the present invention;
Fig. 2 be Fig. 1 A-A to ladder cut open schematic diagram;
Fig. 3 is a kind of sectional view implementing structure according to keying valve of the present invention, wherein, opens and closes valve and is in closed condition;
Fig. 4 is the sectional view being in open mode opening and closing valve shown in Fig. 3;
Fig. 5 is the sectional view implementing structure according to the another kind of keying valve of the present invention;
Fig. 6 is the sectional view of valve gap in Fig. 3 to 5;
Fig. 7 is the side view of valve gap in Fig. 6.
Embodiment
As illustrated in fig. 1 and 2, flap 31 of the present invention comprises for the flap body 311 of the pipeline of throttle down with for providing medium at the endoceliac flow guide sleeve 312 flowing through passage 315 of valve, described flow guide sleeve both ends open, makes it can separately or coordinate the flow guide sleeve of another flap 31 to be communicated with the upstream and downstream passage (i.e. inlet channel and outlet passage) of valve; This flap body 311 is accepted mutually with the outer wall of flow guide sleeve 312, make flap body 311 for concordant with the end face being positioned at homonymy of flow guide sleeve 312 with the end face that the inwall of valve contacts, form the surface of contact of flap 31.At this, the surface of contact of flap can have hard alloy layer by surfacing, such as surfacing STL, to improve the wear resistance of the surface of contact of flap.
For the valve body that seal request is lower, single valve clack can be adopted, namely namely flap itself uses as spool, like this, first and second end faces respect to one another of flap are the end face for contacting with the inwall of valve, make the first end face of flow guide sleeve 312 (with the first end face homonymy of flap) concordant with the first end face of flap 311, second end face (with the second end face homonymy of flap) of flow guide sleeve 312 is concordant with the first end face of flap 311.
For the valve body that seal request is higher, usual employing Double-clack, need to add the component such as the elastic component realizing pretension between flap, for the flap of this kind of demand, as illustrated in fig. 1 and 2, first end face of its flap body 311, as concordant with first end face being positioned at homonymy of flow guide sleeve with the end face that the inwall of valve contacts, forms the surface of contact of flap; And the inside indentation of the second end face being positioned at homonymy that the second end face opposite flow relative with the first end face of flap body overlaps.
For flap as illustrated in fig. 1 and 2, second end of formation second end face of its flow guide sleeve 312 can be the stepped part 314 radially protruded, so that add Sealing when connecing with another flap group, like this, also can reduce the materials of other parts of flow guide sleeve, namely reduce the wall thickness of other parts.
As shown in Figure 3, adopt the spool 3 of flap 31 as illustrated in fig. 1 and 2, comprise two above-mentioned flaps 31, respectively as left and right flap 31a, 31b, second end face seal of the flow guide sleeve 312 of left and right flap 31a, 31b connects, and forms the guide channel for the upstream passageway and downstream passage that are communicated with valve of spool 3.This spool 3 also comprises a back shaft 32 for being connected with the valve rod of valve, a left side for back shaft 32, right-hand member respectively with a left side, right flap 31a, the flap body 311 of 31b limits it and connects in relative rotation, such as, as illustrated in fig. 1 and 2, can arrange non-circular on the second end face of flap body 311 is such as square special impression 313, and the axle head of back shaft 32 arranges the special-shaped axle head with the mating shapes of special impression 313, like this, back shaft 32 can be limited rotate relative to flap body 311, by design back shaft, a left side can be ensured, the synchronism of the motion of right flap, in addition, this back shaft 32 is provided with a left side, right limit part 33a, 33b, one left elastic component 34a is arranged between the second end face of the flap body 311 of left limit part 33a and left flap 31a, one right elastic component 34b is arranged between the second end face of the flap body 311 of right limit part 33b and right flap 31b, like this, described spool 3 is namely by a left side, right elastic component 34a, the pretightening force that 34b provides is pressed in (on the surface of contact of such as valve gap) on the surface of contact with valve and produces seal pressure, realize sealing reliably, like this, flow guide sleeve is coordinated can effectively to avoid valve to enter in valve body cavity in keying movement process medium.In the present embodiment, left and right elastic component 34a, 34b can but be not limited to employing disc spring.
In order to realize a left side, right flap 31a, flow guide sleeve 312 being tightly connected in the second end of 31b, this left side, right flap 31a, the flow guide sleeve of 31b is at the sheathed flap cover 39 of the seam crossing of the two, left, right flap 31a, one is arranged in the radial direction of flap cover 39 by the extruding of flap cover 39 between second end face of the flow guide sleeve 312 of 31b, and at flap cover 39 axially by left, right flap 31a, the Sealing 38 of flow guide sleeve 312 extruding of 31b, the seal 38 can adopt principle of hollow metal O-ring, like this, a left side can passed through, the flow guide sleeve of right flap, flap cover 39 and Sealing 38 4 form sealing pair, no matter left, right flap is in stretching, extension or compressive state, medium all can not enter in valve body cavity when flowing through guide channel.In addition, this flap cover 39 can ensure that left and right flap is synchronized with the movement further.
Above left limit part 33a can be left adjusting nut, and left adjusting nut is connected with left section of screw-thread fit of back shaft 32, to regulate the compression degree of left elastic component.In like manner, right limit part 33b can be right adjusting nut, and right adjusting nut is connected with right section of screw-thread fit of back shaft 32, to regulate the compression degree of right elastic component.Like this, i.e. the seal pressure that produces the flap body effect of left and right flap of adjustable left and right elastic component 34a, 34b, to reach the effect that valve can seal and can easily open and close.
As shown in Figure 3, the keying valve (as a kind of valve) of the above-mentioned spool of employing of the present invention comprises valve body 1, two valve gap 2 as shown in Figures 6 and 7 and the power plant with valve rod 81 be installed on valve body 1, valve gap 2 is provided with passage 22; Two valve gaps are divided into valve body 1 two ends respectively as left and right valve gap 2a, 2b and are such as linked together (valve gap 2 is provided with the connecting through hole for wearing stud 5 that a circle is evenly arranged on the outer periphery) by stud 5 and hexagon nut 4 with valve body 1, make valve body 1 and left and right valve gap 2a, 2b surround the valve body cavity opening and closing valve; Pipeline on left and right valve gap communicates with valve body cavity (when referring to not arrange spool) respectively as the upstream and downstream pipeline opening and closing valve.The inwall 211 of this valve gap 2 can arrange a circle draw-in groove 212, and valve body 1 is engaged with draw-in groove 212 by the inserted part in both ends of the surface, can arrange between the inserted part of valve body 1 and the bottom surface of draw-in groove 212 in the middle part of a circle and pad 6, realize valve gap to coordinate stud 5 and hexagon nut 4 and be connected with the reliable of valve body.
In addition, as shown in Figures 6 and 7, the tube wall 25 of the passage of valve gap 2 extends radially outward the mounting flange 26 formed for the pipeline communication with conveying medium in outer end.
This keying valve also comprises above-mentioned spool 3, and spool 3 is located in left and right between valve gap 2a, 2b, and is slidably matched by the surface of contact of left and right flap 31a, 31b and the surface of contact of left and right valve gap 2a, 2b, and this back shaft 32 is installed on valve rod 81; Spool 3, the requirement of the relative position relation of left and right valve gap 2a, 2b is: as shown in Figure 3, when power plant move to movable valve plug 3 close stance opening and closing valve by valve rod 81, left and right flap 31a, 31b close upstream and downstream passage respectively, namely distinguish shutoff upstream and downstream passage; As shown in Figure 4, when power plant by valve rod 81 with movable valve plug 3 move to open and close the opening of valve time, the guide channel of spool 3 is directly communicated with upstream and downstream passage, medium is made to flow through keying valve through guide channel, and the component of erosion keying valve in valve body cavity can not be entered, especially can not damage left and right elastic component, effectively avoid spring failure, extend the working life opening and closing valve.
This back shaft 32 axially can be installed on valve rod relative to the mode of valve rod 81 movement at back shaft, like this, both can ensure that the pretightening force that left and right elastic component 34a, 34b provide balancedly acted on left and right flap 31a, 31b of both sides, valve rod 81 can be avoided again stressed in the radial direction thereof, such valve rod 81 by the axial force of the axis along valve rod produced during valve opening and closing, advantageously in the use of valve rod and valve.In the present embodiment, the end of valve rod 81 has a mounting sleeve, and back shaft 32 is connected (being such as flat key) with mounting sleeve by key to carry out being connected at the axially relatively-movable of back shaft.
On the one hand making to be deposited on the endoceliac medium coking of valve and locking in order to avoid damaging because of valve one end sealing surface, causing valve to open, on the other hand for pipe first-aid strives for the more time, a bleeder valve 7 can be installed on valve body 1.
In order to the surface of contact of flap with the use of, the inwall of valve gap 2 has the seal boss 23 arranged around passage 22, to reduce the processing area of the surface of contact of valve gap 2, it is such as the hard alloy layer of STL that the surface of contact of sealing boss 23 has as the surface of contact surfacing of valve gap, the surface of contact of the first end face of the flap body of left flap 31a and the seal boss 23 of left valve gap 2a is slidably matched, and the surface of contact of the first end face of the flap body of right flap 31b and the seal boss 23 of right valve gap 2b is slidably matched.The inwall of this valve gap 2 also can arrange one piece of support rim 24 be positioned at above seal boss 23, as shown in Figure 4, support rim 24 is for when valve core movement is to the opening of valve body, and the top edge be positioned at above passage 22 of fitted seal boss 23 supports flap body.Under the effect of left and right elastic component 34a, 34b, the hard alloy layer of flap and the hard alloy layer of valve gap all the time close contact seal, and like this, open and close valve and no matter be in the state of opening or closing, medium all can not enter valve body cavity from sealing surface.
Those skilled in the art can according to the specific requirement of valve, the smooth degree of the surface of contact of setting valve gap and flap, the surface of contact of the surface of contact of this valve gap 2 (surface of contact for seal boss for having seal boss) and flap can obtain the surface roughness of 0.2 μm by the mode of surface grinding machine and/or hand lapping, like this, valve can be made to obtain high-quality sealing effect and wear resistance.
The outer wall of the flow guide sleeve of this flap 31 can be arranged for limit spool upwards and the distance moved down be such as the bounding means 318 of screw, the inwall of valve body is provided with the block etc. coordinating bounding means 318 to use, another bounding means 318 also can limit flap cover left and right play.
Above-mentioned power plant can adopt any structure moved up and down by valve rod band movable valve plug, such as can adopt the structure identical with the power plant of common Pneumatic gate valve as shown in Figures 3 and 4, this kind of power plant comprise the fitting seat be connected with valve body 1, valve rod 81 stretches in valve body cavity through fitting seat, be provided with disc spring 87, Packing seat 86, upper filler 85, spacer ring 84, lower filler 83 and upper seal support 82 between valve rod 81 and fitting seat from top to bottom, pneumatic actuator 813 is installed on fitting seat through support 812.In addition, above-mentioned power plant also can adopt structure as shown in Figure 5.Linear motion type pneumatic actuator can be adopted under some special operation condition condition to shorten the opening and closing time of valve, make it to become quick-acting valve.Because improvement of the present invention does not relate to power setting part, therefore, the concrete structure of power plant is not described in detail in the present invention.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention.Namely all equivalences done according to the content of the claims in the present invention change and modify, and all should belong to technical scope of the present invention.
Claims (7)
1. a spool, it comprises two flaps, described flap comprises for the flap body of the pipeline of throttle down with for providing medium at the endoceliac flow guide sleeve flowing through passage of valve, described flow guide sleeve both ends open, described flap body is accepted mutually with the outer wall of flow guide sleeve, make flap body for concordant with the end face being positioned at homonymy of flow guide sleeve with the end face that the inwall of valve contacts, form the surface of contact of flap; The surface of contact surfacing of described flap has hard alloy layer; First end face of described flap body, as concordant with first end face being positioned at homonymy of flow guide sleeve with the end face that the inwall of valve contacts, forms the surface of contact of flap; The inside indentation of the second end face being positioned at homonymy that the second end face opposite flow relative with the first end face of described flap body overlaps;
It is characterized in that: described two flaps are respectively as left and right flap, and the second end face seal of the flow guide sleeve of described left and right flap connects, form the guide channel for the upstream passageway and downstream passage that are communicated with valve of spool; One limits it with the flap body of left and right flap respectively for the left and right end of the back shaft be connected with the valve rod of valve is connected in relative rotation, described back shaft is provided with left and right bounding means, one left elastic component is arranged between the second end face of the flap body of left limit part and left flap, and a right elastic component is arranged between the second end face of the flap body of right limit part and right flap.
2. spool according to claim 1, it is characterized in that: the flow guide sleeve of described left and right flap is at the sheathed flap cover of the seam crossing of the two, arrange between second end face of the flow guide sleeve of described left and right flap one flap cover radial direction on by flap cover extruding, flap cover axially by the Sealing that the flow guide sleeve of left and right flap extrudes.
3. spool according to claim 2, is characterized in that: the second end of formation second end face of the flow guide sleeve of described flap is the stepped part radially protruded, and described flap cover is sheathed in the stepped part of left and right flap.
4. spool according to claim 1, is characterized in that: described left limit part is left adjusting nut, and described left adjusting nut is connected with left section of screw-thread fit of back shaft, to regulate the compression degree of left elastic component; And/or described right limit part is right adjusting nut, described right adjusting nut is connected with right section of screw-thread fit of back shaft, to regulate the compression degree of right elastic component.
5. a keying valve, as the power plant with valve rod that a kind of valve comprises valve body, two valve gaps and is installed on valve body, described valve gap is provided with passage; Two valve gaps are divided into valve body two ends respectively as left and right valve gap and link together with valve body, make valve body and left and right valve gap surround the valve body cavity opening and closing valve; Pipeline on left and right valve gap communicates with valve body cavity respectively as the upstream and downstream pipeline opening and closing valve; It is characterized in that:
Described keying valve also comprises the spool according to any one of Claims 1-4, and described spool is located between left and right valve gap, and is slidably matched by the surface of contact of left and right flap and the surface of contact of left and right valve gap, and described back shaft is installed on valve rod; Described spool, the requirement of the relative position relation of left and right valve gap is: when power plant drive valve core movement extremely to open and close the close stance of valve by valve rod, left and right flap closes upstream and downstream passage respectively; When power plant drive valve core movement to when opening and closing the opening of valve by valve rod, the guide channel of spool is directly communicated with upstream and downstream passage, makes medium flow through keying valve through guide channel.
6. keying valve according to claim 5, is characterized in that: described back shaft is with can being axially installed on valve rod relative to the mode of valve rod movement at back shaft.
7. keying valve according to claim 5, it is characterized in that: the inwall of described valve gap has the seal boss around channel setting, the surface of contact of described seal boss has hard alloy layer as the surface of contact surfacing of valve gap, the surface of contact of the first end face of the flap body of left flap and the seal boss of left valve gap is slidably matched, and the surface of contact of the first end face of the flap body of right flap and the seal boss of right valve gap is slidably matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210430761.1A CN102913635B (en) | 2012-11-01 | 2012-11-01 | Valve clack, valve core and opening-closing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210430761.1A CN102913635B (en) | 2012-11-01 | 2012-11-01 | Valve clack, valve core and opening-closing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102913635A CN102913635A (en) | 2013-02-06 |
| CN102913635B true CN102913635B (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210430761.1A Expired - Fee Related CN102913635B (en) | 2012-11-01 | 2012-11-01 | Valve clack, valve core and opening-closing valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN102913635B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485419B (en) * | 2015-12-25 | 2018-03-30 | 吴忠仪表有限责任公司 | A kind of control valve of protection against erosion |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2795575Y (en) * | 2005-05-08 | 2006-07-12 | 浙江国达阀门有限公司 | Buried plate gate valve |
| CN201096205Y (en) * | 2007-09-26 | 2008-08-06 | 贺化民 | Gate valve preventing valve cavity from accumulating foreign matter |
| CN201651372U (en) * | 2010-04-14 | 2010-11-24 | 上海飞球阀门有限公司 | Plate valve with the parallel double valve plate having flow guide hole |
| CN202901344U (en) * | 2012-11-01 | 2013-04-24 | 京东大型阀门有限公司 | Valve clack, valve element and open-close valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6517049B2 (en) * | 2001-07-12 | 2003-02-11 | Los Angeles Pump And Valve Products | Method and valve for controlling fluid flow, and method of servicing valve |
-
2012
- 2012-11-01 CN CN201210430761.1A patent/CN102913635B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2795575Y (en) * | 2005-05-08 | 2006-07-12 | 浙江国达阀门有限公司 | Buried plate gate valve |
| CN201096205Y (en) * | 2007-09-26 | 2008-08-06 | 贺化民 | Gate valve preventing valve cavity from accumulating foreign matter |
| CN201651372U (en) * | 2010-04-14 | 2010-11-24 | 上海飞球阀门有限公司 | Plate valve with the parallel double valve plate having flow guide hole |
| CN202901344U (en) * | 2012-11-01 | 2013-04-24 | 京东大型阀门有限公司 | Valve clack, valve element and open-close valve |
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| Publication number | Publication date |
|---|---|
| CN102913635A (en) | 2013-02-06 |
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