CN202901344U - Valve clack, valve element and open-close valve - Google Patents
Valve clack, valve element and open-close valve Download PDFInfo
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- CN202901344U CN202901344U CN 201220570168 CN201220570168U CN202901344U CN 202901344 U CN202901344 U CN 202901344U CN 201220570168 CN201220570168 CN 201220570168 CN 201220570168 U CN201220570168 U CN 201220570168U CN 202901344 U CN202901344 U CN 202901344U
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- guide sleeve
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Abstract
The utility model discloses a valve clack, a valve element, and an open-close valve. The valve clack comprises a valve clack body which can be used for closing a pipeline of a valve and a diversion sleeve which supplies flowing channels inside a valve body cavity for media. A first end face of a valve clack body is parallel and level to a first end face, which is placed on the same side with the first end face of the valve clack body, of the diversion sleeve so as to form a contacting face of the valve clack. The valve element comprises a left valve clack and a right valve clack, second end faces of diversion sleeves of the left valve clack and the right valve clack are connected in a sealing mode so as to form diversion channels of an upstream channel and a downstream channel of a communicating valve of the valve element, the media are enabled to pass the diversion channels to open and close the valve, and then the media do not enter the valve body cavity to scour other parts. The left end and the right end of a supporting shaft of a connecting valve rod are respectively used for limiting relatively rotary connection with the valve clack body of the left valve clack and the right valve clack. An elastic piece which is arranged between a limiting piece and a second end face of the valve clack body is arranged on the supporting shaft. A contacting face of a valve body of the open-close valve and a contacting face of the valve clack of the valve element are both made of spray welding cemented carbide so as to increase seal performance and abrasion performance.
Description
Technical field
The utility model relates to valve and valve member, relates in particular to and open and close valve, opens and closes valve with spool and spool flap.
Background technique
In recent years, fast development along with industries such as domestic petroleum, chemical industry, silicon industry, various large-scale plants are in succession investment construction, production throughout the country, and abrasion-proof hard seal valve (mainly being abrasion-proof hard seal metal ball valve) is used widely in Coal Chemical Industry and silicon commercial plant, and plays key effect to whole device is stable.The applying working condition of this kind valve is to be carried the particles such as 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 to the valve body surface of valve, valve seat with and runner can cause very large impact and abrasion, and powder or granule medium are easy to enter in each slit of valve member especially sealing surface and valve seat and valve body cooperation position, therefore these media are easy to be deposited in the 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 guaranteeing sealing effect and reducing to open and close moment, the valve seat that arranges all is can be along the runner direction activity of valve, thereby the elastic element and the Sealing that are arranged on the valve seat are directly exposed in the medium, so just directly shorten the working life of elastic element and Sealing, and indirectly shortened the working life of valve.
Moreover the media such as coal have characteristics, if be exactly the smooth or transfixion of coal circulation, will polymerization reaction take place, and the coking locking.For example, the cutting-off valve that uses at the direct liquefaction coal slurry pipeline at present all is ball valve, when the action need cutting out pipeline, ball valve is closed, in the spheroid runner and the coal in the valve pocket owing to can't in time discharge, the medium coking just might occur the valve locking can't be opened thereby be deposited on ball chamber and the endoceliac coal of valve.
The model utility content
A purpose of the present utility model is to address the above problem, and provides a kind of medium that makes can't enter the valve body cavity, has reduced the valve flap of medium to the erosion of miscellaneous part in valve sealing face and the valve body cavity.
The technical solution adopted in the utility model is: a kind of flap, comprise for the flap body of the pipeline of throttle down and be used for providing the flow guide sleeve of medium at the endoceliac passage of flowing through of valve, described flow guide sleeve both ends open, described flap body is accepted mutually with the outer wall of flow guide sleeve, make the flap body be used for concordant with the end face that is positioned at homonymy of flow guide sleeve with the contacted end face of the inwall of valve, the surface of contact of formation flap.
Wherein, the surface of contact surfacing of described flap has hard alloy layer.
Wherein, the first end face of described flap body forms the surface of contact of flap as concordant with first end face that is positioned at homonymy of flow guide sleeve with the contacted end face of the inwall of valve; The inside indentation of the second end face that is positioned at homonymy of the second end face relative flow guide sleeve relative with the first end face of described flap body.
Wherein, the second end of formation second end face of the flow guide sleeve of described flap is radially outwardly stepped part.
Second purpose of the present utility model provides a kind of spool that is comprised of above-mentioned flap.
The technical solution adopted in the utility model is: a kind of spool, comprise two above-mentioned flaps, as left and right flap, the second end face seal of the flow guide sleeve of described left and right flap connects respectively, forms the upstream passageway that is used for the connection valve of spool and the guide channel of downstream passage; It is connected the one left and right end that is used for the back shaft be connected with the valve rod of valve with relatively rotating with the flap body limits of left and right flap respectively, be provided with left and right bounding means on the described back shaft, one left elastic component is arranged between second end face of flap body of left limit spare and left flap, and a right elastic component is arranged between second end face of flap body of right limit spare 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 one between the second end face of the flow guide sleeve of described left and right flap and upwards be subjected to the extruding of flap cover in the footpath of flap cover, at the Sealing of the flow guide sleeve extruding that axially is subjected to left and right flap of flap cover.
Wherein, the second end of formation second end face of the flow guide sleeve of described flap is radially outwardly stepped part, and described flap cover is sheathed on the stepped part of left and right flap.
Wherein, described left limit spare is left adjusting nut, and described left adjusting nut is connected with left section screw-thread fit of back shaft, to regulate the compression degree of left elastic component.
Wherein, described right limit spare is right adjusting nut, and described right adjusting nut is connected with right section screw-thread fit of back shaft, to regulate the compression degree of right elastic component.
The 3rd purpose of the present utility model provides a kind of keying valve that adopts above-mentioned spool.
The technical solution adopted in the utility model is: a kind of keying valve, and comprise valve body, two valve gaps and be installed on power plant with valve rod on the valve body as a kind of valve, be provided with passage on the described valve gap; Two valve gaps are divided into the valve body two ends as left and right valve gap respectively and link together with valve body, make valve body and left and right valve gap surround the valve body cavity that opens and closes valve; Pipeline on the left and right valve gap communicates with the valve body cavity as the upstream and downstream pipeline that opens and closes valve respectively;
Described keying valve also comprises above-mentioned spool, and described spool is located between the left and right valve gap, and is slidingly 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 the 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 when opening and closing the close stance of valve by valve rod, left and right flap is closed respectively the upstream and downstream passage; When power plant drive valve core movement when opening and closing the opening of valve by valve rod, the guide channel of spool directly is communicated with the upstream and downstream passage, makes medium through the guide channel keying valve of flowing through.
Wherein, described back shaft with can back shaft axially on the mode that moves relative to valve rod be installed on the valve rod.
Wherein, the end of described valve rod has a mounting sleeve, described back shaft and mounting sleeve by key be connected carry out back shaft axially on relatively-movable being connected.
Wherein, a bleeder valve is installed on the described valve body.
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 slidingly 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 slidingly matched.
Wherein, the surface of contact surfacing of described flap has hard alloy layer.
The beneficial effects of the utility model are: the flap body of the passage of flap of the present utility model by being designed for throttle down and make for the flow guide sleeve of MEDIA FLOW through the valve body cavity at valve open, can avoid medium in the sealing surface of valve and the valve body cavity such as the erosion that is elastic component etc., can effectively prolong the working life of valve, also can not cause valve to open and close because medium deposits in the valve body cavity;
Because flap is with respect to valve body, valve handle activity, so the radial force (along valve rod radial force radially) that valve rod is not produced by medium and elastic component, phenomenons such as " block, suppress " can not occur in valve rod, so the keying moment of valve is little;
In addition, flap of the present utility model, spool and keying valve have the advantage that structural design is simple, reasonable, manufacturing process is simple and cost is low; The main sealing station of valve, can have been realized reaching the metal sealing zero leakage to high temperature, with the control requirement of particle, high parameter performance fluid without nonmetallic material by adopting the processing of surfacing hard alloy layer effectively.
Description of drawings
Fig. 1 is a kind of right elevation of implementing structure according to flap described in the utility model;
Fig. 2 be Fig. 1 A-A to ladder cut open schematic diagram;
Fig. 3 is a kind of sectional view of implementing structure according to keying valve described in the utility model, wherein, opens and closes valve and is in closed condition;
Fig. 4 is the sectional view that is in open mode of keying valve shown in Figure 3;
Fig. 5 is the sectional view of implementing structure according to the another kind of keying valve described in the utility model;
Fig. 6 is the sectional view of valve gap among Fig. 3 to 5;
Fig. 7 is the side view of valve gap among Fig. 6.
Embodiment
As illustrated in fig. 1 and 2, flap 31 of the present utility model comprises for the flap body 311 of the pipeline of throttle down and is used for providing the flow guide sleeve 312 of medium at the endoceliac passage 315 of flowing through of valve, described flow guide sleeve both ends open makes it can be separately or cooperate the flow guide sleeve of another flap 31 to be communicated with the upstream and downstream passage (being 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 be used for concordant with the end face that is positioned at homonymy of flow guide sleeve 312 with the contacted end face of the inwall of valve, the surface of contact of formation flap 31.At this, but the surface of contact surfacing of flap has hard alloy layer, and surfacing STL for example is with the wear resistance of the surface of contact that improves flap.
For the lower valve body of seal request, can adopt single valve clack, be that flap itself namely uses as spool, like this, first and second end faces respect to one another of flap be for the contacted end face of the inwall of valve, make first end face (with the first end face homonymy of flap) of flow guide sleeve 312 concordant with the first end face of flap 311, the second end face of flow guide sleeve 312 (with the second end face homonymy of flap) is concordant with the first end face of flap 311.
For the higher valve body of seal request, usually adopt Double-clack, need to add the component such as elastic component of realizing pretension between the flap, flap for this kind demand, as illustrated in fig. 1 and 2, the first end face of its flap body 311 forms the surface of contact of flap as concordant with first end face that is positioned at homonymy of flow guide sleeve with the contacted end face of the inwall of valve; And the inside indentation of the second end face that is positioned at homonymy of the second end face relative flow guide sleeve relative with the first end face of flap body.
For flap as illustrated in fig. 1 and 2, the second end of formation second end face of its flow guide sleeve 312 can be radially outwardly stepped part 314, so that with another flap winding the time, add Sealing, and 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, the second end face seal of the flow guide sleeve 312 of left and right flap 31a, 31b connects, and forms the upstream passageway that is used for the connection valve of spool 3 and the guide channel of downstream passage.This spool 3 also comprises one for the back shaft 32 that is connected with the valve rod of valve, the left side of back shaft 32, right-hand member respectively with a left side, right flap 31a, the flap body 311 of 31b limits it and connects with relatively rotating, for example, as illustrated in fig. 1 and 2, can arrange at the second end face of flap body 311 non-circular for example is square special impression 313, and the special-shaped axle head that the shape of the axle head setting of back shaft 32 and special impression 313 is complementary, like this, can limit back shaft 32 rotates relative to flap body 311, by the design back shaft, can guarantee a left side, the synchronism of the motion of right flap; In addition, be provided with a left side on this back shaft 32, right limit spare 33a, 33b, one left elastic component 34a is arranged between the second end face of flap body 311 of left limit spare 33a and left flap 31a, one right elastic component 34b is arranged between the second end face of flap body 311 of right limit spare 33b and right flap 31b, like this, described spool 3 can be by left, right elastic component 34a, the pretightening force that 34b provides is pressed in that (for example on the surface of contact of valve gap) produces seal pressure on the surface of contact with valve, realize reliably sealing, like this, cooperate flow guide sleeve can effectively avoid valve to enter in the 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 and adopt the dish 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, arrange one between the second end face of the flow guide sleeve 312 of 31b and upwards be subjected to 39 extruding of flap cover in the footpath of flap cover 39, and axially be subjected to a left side at flap cover 39, 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 and stretches or compressive state, and medium can not enter in the valve body cavity when flowing through guide channel.In addition, this flap cover 39 can guarantee further that left and right flap is synchronized with the movement.
Above left limit spare 33a can be left adjusting nut, and left adjusting nut is connected with left section screw-thread fit of back shaft 32, to regulate the compression degree of left elastic component.In like manner, right limit spare 33b can be right adjusting nut, and right adjusting nut is connected with right section screw-thread fit of back shaft 32, to regulate the compression degree of right elastic component.Like this, can regulate left and right elastic component 34a, 34b to the seal pressure of the flap body effect generation of left and right flap, the effect that can seal and can easily open and close to reach valve.
As shown in Figure 3, the keying valve of the above-mentioned spool of employing of the present utility model (as a kind of valve) comprise valve body 1, two shown in Fig. 6 and 7 valve gap 2 and be installed on power plant with valve rod 81 on the valve body 1, be provided with passage 22 on the valve gap 2; Two valve gaps are divided into valve body 1 two ends as left and right valve gap 2a, 2b respectively and for example are to link together (valve gap 2 is provided with the connecting through hole that is used for wearing stud 5 that a circle is evenly arranged in 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 that opens and closes valve; Pipeline on the left and right valve gap communicates with the valve body cavity (referring to not arrange in the situation of spool) as the upstream and downstream pipeline that opens and closes valve respectively.The inwall 211 of this valve gap 2 can arrange a circle draw-in groove 212, and valve body 1 engages with draw-in groove 212 by the inserted part on the both ends of the surface, one circle middle part pad 6 can be set between the bottom surface of the inserted part of valve body 1 and draw-in groove 212, realize that to cooperate stud 5 to be connected with hexagon nut valve gap is connected with the reliable of valve body.
In addition, shown in Fig. 6 and 7, the tube wall 25 of the passage of valve gap 2 extends radially outward the mounting flange 26 that is formed for the pipeline communication of conveying medium in the outer end.
This keying valve also comprises above-mentioned spool 3, and spool 3 is located between left and right valve gap 2a, the 2b, and is slidingly 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 the 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 moved to the close stance that opens and closes valve by valve rod 81 with movable valve plug 3, left and right flap 31a, 31b closed respectively the upstream and downstream passage, namely distinguished shutoff upstream and downstream passage; As shown in Figure 4, when power plant move to when opening and closing the opening of valve with movable valve plug 3 by valve rod 81, the guide channel of spool 3 directly is communicated with the upstream and downstream passage, make medium through the guide channel keying valve of flowing through, and can not enter the component that erosion in the valve body cavity opens and closes valve, especially can not damage left and right elastic component, effectively avoid spring failure, prolong the working life that opens and closes valve.
This back shaft 32 can back shaft axially on the mode that moves relative to valve rod 81 be installed on the valve rod, like this, both can guarantee that the pretightening force that left and right elastic component 34a, 34b provide balancedly acted on left and right flap 31a, the 31b of both sides, can avoid again valve rod 81 directly upwards stressed at it, the axial axial force along valve rod that produces when 81 of valve rods are subjected to valve opening and closing like this is conducive to the use of valve rod and valve more.In the present embodiment, the end of valve rod 81 has a mounting sleeve, back shaft 32 and mounting sleeve by key be connected (for example being flat key) carry out back shaft axially on relatively-movable being connected.
For fear of being deposited on the endoceliac medium coking of valve locking because valve one end sealing surface damages to make, cause valve to open on the one hand, strive for the more time for pipe first-aid on the other hand, can a bleeder valve 7 be installed at valve body 1.
For the surface of contact with flap is used in conjunction with, the inwall of valve gap 2 has the seal boss 23 that arranges around passage 22, processing area with the surface of contact that reduces valve gap 2, it for example is 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 slidingly 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 slidingly matched.The inwall of this valve gap 2 also can arrange a support rim 24 that is positioned at seal boss 23 tops, as shown in Figure 4, support rim 24 is used at valve core movement during to the opening of valve body, and the top edge that is positioned at passage 22 tops of fitted seal boss 23 supports the flap body.Under the effect of left and right elastic component 34a, 34b, all the time close contact sealing of the hard alloy layer of flap and the hard alloy layer of valve gap like this, opens and closes valve and no matter is in the state of opening or closing, and medium can not enter the valve body cavity from sealing surface.
Those skilled in the art can be according to the specific requirement of valve, set the smooth degree of the surface of contact of valve gap and flap, the surface of contact of this valve gap 2 (being the surface of contact of seal boss for what have a seal boss) and the surface of contact of flap can obtain by the mode of surface grinding machine and/or hand lapping the surface roughness of 0.2 μ m, like this, can make valve obtain high-quality sealing effect and wear resistance.
Can be provided for limiting spool on the outer wall of the flow guide sleeve of this flap 31 upwards and the distance that moves down for example be the bounding means 318 of screw, be provided with the block of cooperation bounding means 318 uses etc. on the inwall of valve body, bounding means 318 also can limit flap cover left and right sides play in addition.
Above-mentioned power plant can adopt any structure that can move up and down by valve rod band movable valve plug, for example can adopt such as Fig. 3 and the identical structure of power plant shown in the of 4 and common Pneumatic gate valve, this kind power plant comprise the fitting seat that is connected with valve body 1, valve rod 81 is in fitting seat stretches into the valve body cavity, be provided with from top to bottom dish spring 87, Packing seat 86, upper filler 85, spacer ring 84, lower filler 83 and upper seal support 82 between valve rod 81 and the fitting seat, pneumatic actuator 813 is installed on the fitting seat through support 812.In addition, above-mentioned power plant also can adopt structure as shown in Figure 5.Under some special operation condition condition, can adopt linear motion type pneumatic actuator to shorten the opening and closing time of valve, make it to become quick-acting valve.Because improvement of the present utility model does not relate to power setting part, therefore, the concrete structure to power plant is not elaborated in the utility model.
Being preferred embodiment of the present utility model only in sum, is not to limit practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should belong to technical scope of the present utility model.
Claims (10)
1. flap, it is characterized in that: comprise for the flap body of the pipeline of throttle down and be used for providing the flow guide sleeve of medium at the endoceliac passage of flowing through of valve, described flow guide sleeve both ends open, described flap body is accepted mutually with the outer wall of flow guide sleeve, make the flap body be used for concordant with the end face that is positioned at homonymy of flow guide sleeve with the contacted end face of the inwall of valve, the surface of contact of formation flap.
2. flap according to claim 1 is characterized in that: the first end face of described flap body is as concordant with first end face that is positioned at homonymy of flow guide sleeve with the contacted end face of the inwall of valve, the surface of contact of formation flap; The inside indentation of the second end face that is positioned at homonymy of the second end face relative flow guide sleeve relative with the first end face of described flap body.
3. spool, it is characterized in that: comprise two flaps claimed in claim 2, as left and right flap, the second end face seal of the flow guide sleeve of described left and right flap connects respectively, forms the upstream passageway that is used for the connection valve of spool and the guide channel of downstream passage; It is connected the one left and right end that is used for the back shaft be connected with the valve rod of valve with relatively rotating with the flap body limits of left and right flap respectively, be provided with left and right bounding means on the described back shaft, one left elastic component is arranged between second end face of flap body of left limit spare and left flap, and a right elastic component is arranged between second end face of flap body of right limit spare and right flap.
4. spool according to claim 3, 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 one between the second end face of the flow guide sleeve of described left and right flap and upwards be subjected to the extruding of flap cover in the footpath of flap cover, at the Sealing of the flow guide sleeve extruding that axially is subjected to left and right flap of flap cover.
5. spool according to claim 4 is characterized in that: the second end of formation second end face of the flow guide sleeve of described flap is radially outwardly stepped part, and described flap cover is sheathed on the stepped part of left and right flap.
6. spool according to claim 3, it is characterized in that: described left limit spare is left adjusting nut, described left adjusting nut is connected with left section screw-thread fit of back shaft, to regulate the compression degree of left elastic component; And/or,
Described right limit spare is right adjusting nut, and described right adjusting nut is connected with right section screw-thread fit of back shaft, to regulate the compression degree of right elastic component.
7. keying valve comprises valve body, two valve gaps and is installed on power plant with valve rod on the valve body as a kind of valve, is provided with passage on the described valve gap; Two valve gaps are divided into the valve body two ends as left and right valve gap respectively and link together with valve body, make valve body and left and right valve gap surround the valve body cavity that opens and closes valve; Pipeline on the left and right valve gap communicates with the valve body cavity as the upstream and downstream pipeline that opens and closes valve respectively; It is characterized in that:
Described keying valve also comprises each described spool in the claim 3 to 6, and described spool is located between the left and right valve gap, and is slidingly 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 the 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 when opening and closing the close stance of valve by valve rod, left and right flap is closed respectively the upstream and downstream passage; When power plant drive valve core movement when opening and closing the opening of valve by valve rod, the guide channel of spool directly is communicated with the upstream and downstream passage, makes medium through the guide channel keying valve of flowing through.
8. keying valve according to claim 7 is characterized in that: described back shaft with can back shaft axially on the mode that moves relative to valve rod be installed on the valve rod.
9. keying valve according to claim 7, 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 slidingly 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 slidingly matched.
10. keying valve according to claim 9, it is characterized in that: the surface of contact surfacing of described flap has hard alloy layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220570168 CN202901344U (en) | 2012-11-01 | 2012-11-01 | Valve clack, valve element and open-close valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220570168 CN202901344U (en) | 2012-11-01 | 2012-11-01 | Valve clack, valve element and open-close valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202901344U true CN202901344U (en) | 2013-04-24 |
Family
ID=48122015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220570168 Withdrawn - After Issue CN202901344U (en) | 2012-11-01 | 2012-11-01 | Valve clack, valve element and open-close valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202901344U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913635A (en) * | 2012-11-01 | 2013-02-06 | 京东大型阀门有限公司 | Valve clack, valve core and opening-closing valve |
-
2012
- 2012-11-01 CN CN 201220570168 patent/CN202901344U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913635A (en) * | 2012-11-01 | 2013-02-06 | 京东大型阀门有限公司 | Valve clack, valve core and opening-closing valve |
| CN102913635B (en) * | 2012-11-01 | 2015-04-15 | 京东大型阀门有限公司 | Valve clack, valve core and opening-closing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130424 Effective date of abandoning: 20150415 |
|
| RGAV | Abandon patent right to avoid regrant |