CN202469014U - Ultrahigh pressure difference tight cutoff adjustment valve - Google Patents
Ultrahigh pressure difference tight cutoff adjustment valve Download PDFInfo
- Publication number
- CN202469014U CN202469014U CN2012200515803U CN201220051580U CN202469014U CN 202469014 U CN202469014 U CN 202469014U CN 2012200515803 U CN2012200515803 U CN 2012200515803U CN 201220051580 U CN201220051580 U CN 201220051580U CN 202469014 U CN202469014 U CN 202469014U
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Abstract
The utility model relates to an ultrahigh pressure difference tight cutoff adjustment valve. The bottom section of a pilot valve core shaft is arranged in a valve core; a protruded annular body is formed on the circumferential wall of the pilot valve core shaft in the valve core; a balance hole is formed in the annular body; the pilot valve core shaft ascends to lift the valve core through the annular body; a valve core hole is formed in the valve core; and the pilot valve core shaft at the lower end of the annular body selectively plugs the valve core hole. A sleeve valve, an upper sealing valve cover structure and a self-sealing valve seat are combined, and the pilot valve core shaft structure is used, so that requirements for upper sealing, valve seat sealing and tight cutoff are achieved under the action of pressure of a medium; the requirement on a thrust of an execution mechanism is reduced, and a use requirement on the field working condition is met; and the service life of the valve is prolonged.
Description
Technical field
The utility model relates to a kind of valve, especially a kind of superhigh pressure difference featuring rigid cutting-off modulating valve.
Background technique
The thermionic valves net height presses superheated vapor to regulate cut-off valve dependence on import product always for a long time, and to this special operation condition, applying unit generally adopts the mode of import, on the one hand because HTHP; Because the position is important, product performance require high on the other hand; Moreover the telescoping valve structure of domestic common use can not reach the imported product level fully, and leakage class can not satisfy the zero leakage requirement on the one hand; On the other hand the valve required thrust excessive, cause that action noise is big, defective such as working life is short.So domestic applying unit is generally all selected imported product comparatively reliably.Even if but the excessive phenomenon of actuator also can appear in imported product, so domestic a lot of applying unit all has the strong domestic product that can buy substituting import one that is desirably in.
The valve of previously used this occasion is even the product of import all is the telescoping valve structure basically.Because be the superhigh pressure difference use occasion, so can only use the multistage sleeve could satisfy the usage requirement of High Pressure Difference.But because this valve is except that having the requirement of adjusting; Also need when closing, realize the target of tight shutoff even zero leakage; This just has very big difficulty; Because be the high temperature use occasion, can not use soft sealing structure, shape metallic leak-proof structure leans on the power of actuator to carry out tight shutoff difficulty really down.Only way is exactly the thrust that need to improve actuator, so actuator's size is very big, and easily sealing surface of seat is damaged during the actuator quick closedown of high thrust.In addition, when adopting the balanced type valve core structure, the sealing of spool and sleeve is again an individual big problem, generally all adopts the flexible graphite material that can satisfy the high temperature usage requirement, but has brought the use problem that Expanded graphite frictional force is excessive and the life-span is long simultaneously again.Impact failure and high temperature use occasion for sealing surface; All adopt the method for pile-up welding hard alloy to carry out both at home and abroad; For high temperature spool sealing material; Basically all adopt flexible graphite material, but because domestic bead-welding technology level and flexible graphite material performance and very big gap is abroad arranged, so use same structure to be difficult to satisfy the field working conditions usage requirement at home.
Summary of the invention
The purpose of the utility model is to overcome the deficiency that exists in the existing technology, and a kind of superhigh pressure difference featuring rigid cutting-off modulating valve that can tightly turn-off, increase the service life is provided.
According to the technological scheme that the utility model provides, said superhigh pressure difference featuring rigid cutting-off modulating valve offers medium inlet hole and media outlet hole on valve body; On valve body, be fixed with valve gap, on valve gap, be fixed with Stuffing box, sealing is plugged with the pilot valve mandrel in Stuffing box; On valve gap, be fixed with actuator's seat, formerly on the pilot valve mandrel fixture block be installed, valve seat is installed in valve body through support screw; Bottom at Stuffing box is connected with outer sleeve, offers the outer sleeve metering hole outside on the sleeve, and the sleeve internal fixation has the sleeve pressing plate outside; On the sleeve pressing plate, be fixed with inner sleeve, on inner sleeve, offer the inner sleeve metering hole, have the gap between inner sleeve and the outer sleeve; The inner sleeve metering hole is dislocation with the outer sleeve metering hole and cooperates, and is provided with spool in the inside of inner sleeve, and spool and valve seat selectivity are sealed and matched; The end section of said pilot valve mandrel is installed in the inside of spool; Being positioned at lobed ring bodies on the pilot valve mandrel perisporium of valve core inside, on ring bodies, offer equalizing orifice, the pilot valve mandrel rises and mentions said spool through the ring-type physical efficiency; On spool, offer spool bore, the said spool bore of pilot valve mandrel selective shut-off of ring bodies lower end.
Formerly seat has first belleville spring in the spool of pilot valve mandrel below, on first belleville spring, is provided with dish spring spacer.
Spool perisporium above inner sleeve offers guide ring annular groove is installed, and in guide ring is installed annular groove, guide ring is installed, and guide ring is installed the thickness of the height of annular groove greater than guide ring, and the cylindrical of guide ring contacts with the inwall of said inner sleeve; Interior half dog points edge at guide ring offers balancing slit.
On valve seat, be fixed with the belleville spring trim ring; Between belleville spring trim ring and valve seat, be provided with second belleville spring and valve seat insert; The cylindrical of said second belleville spring and belleville spring trim ring offset; The interior circle of second belleville spring and the cylindrical of valve seat insert offset, and the interior circle and the valve seat of valve seat insert offset.
On spool, be bolted with valve core nut, the bottom end of the top end of ring bodies and valve core nut offsets to mention said spool on the pilot valve mandrel.
On the bottom end of valve gap, be fixed with four fens rings; Bottom at four fens rings is provided with the valve bonnet seal ring back-up ring; On the bottom end of valve bonnet seal ring back-up ring, be fixed with the valve gap pressure sealing ring; The inwall bottom of valve gap pressure sealing ring is an internal conical surface, and the Stuffing box outer wall of valve gap pressure sealing ring position has outer conical surface, and the internal conical surface of valve gap pressure sealing ring inwall bottom cooperates with the outer conical surface of Stuffing box outer wall.
Tip portion at Stuffing box is fixed with Gland; Gland is enclosed within on the pilot valve mandrel; On the pilot valve mandrel below the Gland, be socketed with the filler gland; Between filler gland and Gland, be provided with the 3rd belleville spring, the upper end portion and the Gland of the 3rd belleville spring offset, and the underpart of the 3rd belleville spring and filler gland offset.
Be provided with some sleeve glands in the Stuffing box above the sleeve pressing plate; The sleeve gland is socketed on the pilot valve mandrel; On the pilot valve mandrel above the sleeve gland, be socketed with the filler group, the underpart of filler group and sleeve gland offset, and the upper end portion of filler group and filler gland offset.
The utility model uses telescoping valve and upper sealing valve lid structure and the combination of selfsealings valve seat; And use pilot valve mandrel structure; Utilize the pressure of medium realize to go up the requirement of sealing, valve base sealing, tight shutoff; Both reduce actuator's thrust requirement, satisfied the field working conditions usage requirement again, also prolonged the working life of valve simultaneously.
Description of drawings
Fig. 1 is the overall structure schematic representation of the utility model.
Fig. 2 is the structural drawing of pilot valve mandrel in the utility model.
Fig. 3 is the structural drawing of guide ring in the utility model.
Fig. 4 is the structural drawing of selfsealings valve seat in the utility model;
Fig. 5 is the cut-away view of multistage sleeve in the utility model.
Embodiment
Below in conjunction with concrete accompanying drawing and embodiment the utility model is described further.
As shown in the figure, the utility model mainly is made up of parts such as valve body 1, valve seat 2, inner sleeve 3, inner sleeve metering hole 3.1, Stuffing box 4, outer sleeve 4.1, outer sleeve metering hole 4.2, guide ring 5, balancing slit 5.1, pilot valve mandrel 6, valve seat insert 7, spool 8, first belleville spring 9, dish spring spacer 10, valve core nut 11, sleeve pressing plate 12, fixing pin 13, sleeve gland 14, valve gap pressure sealing ring 15, valve bonnet seal ring back-up ring 16, four fens rings 17, valve gap 18, filler group 19, filler gland 20, the 3rd belleville spring 21, Gland 22, support screw 23, fixture block 24, actuator's seat 25, second belleville spring 26 and belleville spring trim rings 27.
This superhigh pressure difference featuring rigid cutting-off modulating valve offers medium inlet hole and media outlet hole on valve body 1, on valve body 1, be fixed with valve gap 18; On valve gap 18, be fixed with Stuffing box 4, sealing is plugged with pilot valve mandrel 6 in Stuffing box 4, on valve gap 18, is fixed with actuator's seat 25 through support screw 23; Formerly on the pilot valve mandrel 6 fixture block 24 is installed, valve seat 2 is installed in valve body 1, be connected with outer sleeve 4.1 in the bottom of Stuffing box 4; Offer outer sleeve metering hole 4.2 on the sleeve 4.1 outside, sleeve 4.1 internal fixation have sleeve pressing plate 12 outside, on sleeve pressing plate 12, are fixed with inner sleeve 3; On inner sleeve 3, offer inner sleeve metering hole 3.1, have the gap between inner sleeve 3 and the outer sleeve 4.1, inner sleeve metering hole 3.1 is dislocation with outer sleeve metering hole 4.2 and cooperates; Be provided with spool 8 in the inside of inner sleeve 3; Spool 8 is sealed and matched with valve seat 2 selectivity, and the end section of said pilot valve mandrel 6 is installed in the inside of spool 8, lobed ring bodies on pilot valve mandrel 6 perisporiums that are positioned at spool 8 inside; On ring bodies, offer equalizing orifice 6.1; Pilot valve mandrel 6 rises and mentions said spool 8 through the ring-type physical efficiency, on spool 8, offers spool bore 8.1, the said spool bore 8.1 of pilot valve mandrel 6 selective shut-ofves of ring bodies lower end.
Formerly seat has first belleville spring 9 in the spool 8 of pilot valve mandrel 6 belows, on first belleville spring 9, is provided with dish spring spacer 10.
Spool 8 perisporiums above inner sleeve 3 offer guide ring annular groove are installed, and in guide ring is installed annular groove, guide ring 5 are installed, and guide ring is installed the thickness of the height of annular groove greater than guide ring 5, and the cylindrical of guide ring 5 contacts with the inwall of said inner sleeve 3; Interior half dog points edge at guide ring 5 offers balancing slit 5.1.
On valve seat 2, be fixed with belleville spring trim ring 27; Between belleville spring trim ring 27 and valve seat 2, be provided with second belleville spring 26 and valve seat insert 7; The cylindrical of said second belleville spring 26 and belleville spring trim ring 27 offset; The interior circle of second belleville spring 26 and the cylindrical of valve seat insert 7 offset, and the interior circle and the valve seat 2 of valve seat insert 7 offset.
On spool 8, be bolted with valve core nut 11, the bottom end of the top end of ring bodies and valve core nut 11 offsets to mention said spool 8 on the pilot valve mandrel 6.
On the bottom end of valve gap 18, be fixed with four fens rings 17; Bottom at four fens rings 17 is provided with valve bonnet seal ring back-up ring 16; On the bottom end of valve bonnet seal ring back-up ring 16, be fixed with valve gap pressure sealing ring 15; The inwall bottom of valve gap pressure sealing ring 15 is an internal conical surface, and Stuffing box 4 outer walls of valve gap pressure sealing ring 15 positions have outer conical surface, and the internal conical surface of valve gap pressure sealing ring 15 inwall bottoms cooperates with the outer conical surface of Stuffing box 4 outer walls.
Tip portion at Stuffing box 4 is fixed with Gland 22; Gland 22 is enclosed within on the pilot valve mandrel 6; On the pilot valve mandrel 6 below the Gland 22, be socketed with filler gland 20; The upper end portion and the Gland 22 that between filler gland 20 and Gland 22, are provided with the 3rd belleville spring 21, the three belleville springs 21 offset, and the underpart of the 3rd belleville spring 21 and filler gland 20 offset.
Be provided with some sleeve glands 14 in the Stuffing box 4 above sleeve pressing plate 12; Sleeve gland 14 is socketed on the pilot valve mandrel 6; On the pilot valve mandrel 6 above the sleeve gland 14, be socketed with filler group 19; The underpart of filler group 19 and sleeve gland 14 offset, and the upper end portion of filler group 19 and filler gland 20 offset.
As can beappreciated from fig. 1, what valve gap 18 sealings were adopted is self sealing structure, realizes the sealing of valve gap 18 and valve body 1 through valve gap pressure sealing ring 15; And pressure medium is big more; Sealing effect is good more, and the pressure of medium all acts on above the Stuffing box 4, reaches to compress valve gap pressure sealing ring 15; Make valve gap pressure sealing ring 15 produce resiliently deformable, thereby reach complete sealing effect.Through the initial sealing specific pressure that the produces hexagon nut above the valve gap 18 and tight, realize the effect of strict seal then through the pressure of medium, and pressure medium is big more, sealing effect is good more.
As can beappreciated from fig. 5; High-pressure medium is through the outer sleeve metering hole 4.2 of outer sleeve 4.1; Enter into the inner sleeve metering hole 3.1 of inner sleeve 3 then through the annular groove between outer sleeve 4.1 and the inner sleeve 3, flow into the metering hole of valve seat 2 then, thereby reach the effect of multistage step-down; Satisfy the demand for control of High Pressure Difference fluid, reduce noise and reduce washing away and destroy spool 8 and valve seat 2 sealing surfaces.
From Fig. 2, can see, the structure principle chart of pilot valve mandrel 6, formerly there are the dish spring spacer 10 and first belleville spring 9 in the lower end of pilot valve mandrel 6, has equalizing orifice 6.1 on the pilot valve mandrel 6.When opening, pilot valve mandrel 6 is opened in advance, and this moment, spool 8 was in state of equilibrium, when pilot valve mandrel 6 is run into valve core nut 11 in the ban, drives spool 8 actions.
When closing, spool 8 moves downward, up to valve seat 2 contact seals; This moment, the pilot valve mandrel 6 was not also closed, because first belleville spring, 9 pretightening forces below the pilot valve mandrel 6 are greater than guide ring 5 frictional force of spool 8 circumference, so; Have only when spool 8 is closed, pilot valve mandrel 6 just can be closed, when pilot valve mandrel 6 is closed in the ban; The pressure of medium all acts on the spool 8, produces the strict seal effect, thereby reaches the requirement of zero leakage.
As can be seen from Figure 4, employing is the self-sealing valve stand structure.Valve seat insert 7 below valve seat 2 is realized the selfsealings effect; Compress valve seat 2 through the inner sleeve 3 above the valve seat 2 on the one hand and produce the initial sealing specific pressure, the installation pretightening force that passes through second belleville spring, 26 generations in valve seat 2 outsides on the other hand produces the initial sealing specific pressure.The downward pressure that active force that actuator produces when closing and medium produce acts on the valve seat insert 7, thereby produces the selfsealings effect of valve seat 2 parts, reaches the effect of valve seat 2 place's strict seal.
As can beappreciated from fig. 3; The guide ring 5 of spool 8 cylindricals has good leading role; Balancing slit 5.1 on the guide ring 5 can reduce washing away this part spool 8 on the one hand; Play the effect that compresses guide ring 5 on the other hand, thereby make guide ring 5 be adjacent to the inwall of inner sleeve 3 more, produce good guide effect.Avoid occurring oscillation phenomenon, prolonged the working life of valve.
Can find out that from Fig. 1 and Fig. 5 must make the inner sleeve metering hole 3.1 of inner sleeve 3 and outer sleeve metering hole 4.2 staggered positions of outer sleeve 4.1 could realize good anti-High Pressure Difference effect, if there is not staggered positions, then anti-High Pressure Difference effect will be had a greatly reduced quality.Therefore in order to realize the conformity of position; On the top of inner sleeve 3 and the bottom of sleeve pressing plate 12 and Stuffing box 4 a plurality of fixing pins 13 are set,, therefore pass through the location of fixing pin 13 because outer sleeve 4.2 is fixed; Inner sleeve 3 just can not rotate because of the unbalanced force of medium; Thereby guaranteed the conformity of inner sleeve 3, outer sleeve 4.1 metering holes, thereby guaranteed the demand of High Pressure Difference medium, reduced noise and the working life that has prolonged valve.
The utility model adopts the combination of multistage telescoping valve structure and selfsealings valve gap structure; Promptly use multistage sleeve and multistage valve seat construction can realize adjusting and disconnect request to the High Pressure Difference fluid; Reduce medium to greatest extent to the washing away and destroy of spool valve seat, also reduce the noise of valve to greatest extent.Selfsealings valve gap structure; Utilize the distinctive high pressure of medium to produce the selfsealings effect, can avoid producing any risk that leaks outside, also reduced the cost and the valve assembling pressure testing cost of valve gap simultaneously; This self sealing structure is particularly outstanding at the above medium of reply high-pressure medium, especially 1500#.
Absolute leakproofness when pilot valve mandrel 6 structures have been guaranteed to close.During valve open, pilot valve mandrel 6 is opened in advance, and after opening, spool 8 just becomes the balanced type spool; During valve closing, spool 8 is closed earlier, and then closes pilot valve mandrel 6, utilizes the requirement of the high pressure realization zero leakage of medium.This structural principle that utilizes the opening and closing order of pilot valve mandrel 6 and spool 8, the strict seal property in the time of can significantly reducing needed thrust when opening and guarantee valve closing more reliably.Thereby the sealing reliability of the size that reduces actuator when guaranteeing to close.
The self sealing structure of valve seat 2 has been guaranteed the strict seal property of valve seat 2 with valve body 1.Abandon the washer sealing structure of ordinary cartridge valve, used the metal self-sealing structure.Sleeve pressing plate 12 through filler group 19 bottoms compresses the installation pretightening force that second belleville spring 26 in valve seat insert 7 and valve seat insert 7 outsides of valve seat 2 produces; Can guarantee the initial sealing pretightening force of valve seat insert 7 and valve body 1; High pressure through medium compresses valve seat 2 and valve seat insert 7 at last; Thereby reach the effect of valve seat insert 7 and valve body 1, valve seat 2 strict seal, guaranteed the strict seal at valve seat 2 places.
The spline structure of inner sleeve 3 can be guaranteed the aperture runner conformity of multistage sleeve.Through the structure of spline pin is set in inner sleeve 3 and sleeve pressing plate 12 and stuffing box bottom; Can stop the rotation risk of inner sleeve 3; Thereby guarantee the runner dislocation property of inner sleeve 3, outer sleeve 4.1 upper limit discharge orifices, guaranteed the usage requirement of the negotiability and the High Pressure Difference of valve.
Claims (8)
1. a superhigh pressure difference featuring rigid cutting-off modulating valve offers medium inlet hole and media outlet hole on valve body (1), on valve body (1), is fixed with valve gap (18); On valve gap (18), be fixed with Stuffing box (4); Sealing is plugged with pilot valve mandrel (6) in Stuffing box (4), goes up at valve gap (18) and is fixed with actuator's seat (25) through support screw (23), formerly on the pilot valve mandrel (6) fixture block (24) is installed; Valve seat (2) is installed in valve body (1); Be connected with outer sleeve (4.1) in the bottom of Stuffing box (4), offer outer sleeve metering hole (4.2) on the sleeve (4.1) outside, sleeve (4.1) internal fixation has sleeve pressing plate (12) outside; On sleeve pressing plate (12), be fixed with inner sleeve (3); On inner sleeve (3), offer inner sleeve metering hole (3.1), have the gap between inner sleeve (3) and the outer sleeve (4.1), inner sleeve metering hole (3.1) is dislocation with outer sleeve metering hole (4.2) and cooperates; Be provided with spool (8) in the inside of inner sleeve (3); Spool (8) is sealed and matched with valve seat (2) selectivity, and it is characterized in that: the end section of said pilot valve mandrel (6) is installed in the inside of spool (8), is being positioned at lobed ring bodies on inner pilot valve mandrel (6) perisporium of spool (8); On ring bodies, offer equalizing orifice (6.1); Pilot valve mandrel (6) rises and mentions said spool (8) through the ring-type physical efficiency, on spool (8), offers spool bore (8.1), the said spool bore of pilot valve mandrel (6) selective shut-off (8.1) of ring bodies lower end.
2. superhigh pressure difference featuring rigid cutting-off modulating valve as claimed in claim 1 is characterized in that: formerly seat has first belleville spring (9) in the spool (8) of pilot valve mandrel (6) below, on first belleville spring (9), is provided with dish spring spacer (10).
3. superhigh pressure difference featuring rigid cutting-off modulating valve as claimed in claim 1; It is characterized in that: spool (8) perisporium in inner sleeve (3) top offers guide ring annular groove is installed; In guide ring is installed annular groove, guide ring (5) is installed; Guide ring is installed the thickness of the height of annular groove greater than guide ring (5), and the cylindrical of guide ring (5) contacts with the inwall of said inner sleeve (3); Interior half dog points edge at guide ring (5) offers balancing slit (5.1).
4. superhigh pressure difference featuring rigid cutting-off modulating valve as claimed in claim 1; It is characterized in that: on valve seat (2), be fixed with belleville spring trim ring (27); Between belleville spring trim ring (27) and valve seat (2), be provided with second belleville spring (26) and valve seat insert (7); The cylindrical of said second belleville spring (26) and belleville spring trim ring (27) offset; The cylindrical of the interior circle of second belleville spring (26) and valve seat insert (7) offsets, and the interior circle of valve seat insert (7) and valve seat (2) offset.
5. superhigh pressure difference featuring rigid cutting-off modulating valve as claimed in claim 1; It is characterized in that: on spool (8), be bolted with valve core nut (11), pilot valve mandrel (6) is gone up the top end of ring bodies and the bottom end of valve core nut (11) offsets to mention said spool (8).
6. superhigh pressure difference featuring rigid cutting-off modulating valve as claimed in claim 1; It is characterized in that: on the bottom end of valve gap (18), be fixed with four fens rings (17); The bottom of encircling (17) at four minutes is provided with valve bonnet seal ring back-up ring (16); On the bottom end of valve bonnet seal ring back-up ring (16), be fixed with valve gap pressure sealing ring (15); The inwall bottom of valve gap pressure sealing ring (15) is an internal conical surface, and Stuffing box (4) outer wall of valve gap pressure sealing ring (15) position has outer conical surface, and the internal conical surface of valve gap pressure sealing ring (15) inwall bottom cooperates with the outer conical surface of Stuffing box (4) outer wall.
7. superhigh pressure difference featuring rigid cutting-off modulating valve as claimed in claim 1; It is characterized in that: the tip portion at Stuffing box (4) is fixed with Gland (22); Gland (22) is enclosed within on the pilot valve mandrel (6); On the pilot valve mandrel (6) of Gland (22) below, be socketed with filler gland (20); Between filler gland (20) and Gland (22), be provided with the 3rd belleville spring (21), the upper end portion of the 3rd belleville spring (21) and Gland (22) offset, and the underpart of the 3rd belleville spring (21) and filler gland (20) offset.
8. superhigh pressure difference featuring rigid cutting-off modulating valve as claimed in claim 1; It is characterized in that: in the Stuffing box (4) of sleeve pressing plate (12) top, be provided with some sleeve glands (14); Sleeve gland (14) is socketed on the pilot valve mandrel (6); On the pilot valve mandrel (6) of sleeve gland (14) top, be socketed with filler group (19), the underpart of filler group (19) and sleeve gland (14) offset, and the upper end portion of filler group (19) and filler gland (20) offset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200515803U CN202469014U (en) | 2012-02-17 | 2012-02-17 | Ultrahigh pressure difference tight cutoff adjustment valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200515803U CN202469014U (en) | 2012-02-17 | 2012-02-17 | Ultrahigh pressure difference tight cutoff adjustment valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202469014U true CN202469014U (en) | 2012-10-03 |
Family
ID=46917173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200515803U Withdrawn - After Issue CN202469014U (en) | 2012-02-17 | 2012-02-17 | Ultrahigh pressure difference tight cutoff adjustment valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202469014U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563096A (en) * | 2012-02-17 | 2012-07-11 | 无锡市亚迪流体控制技术有限公司 | Ultrahigh pressure differential tight cut-off regulating valve |
| CN103123004A (en) * | 2013-01-21 | 2013-05-29 | 中国航天空气动力技术研究院 | Hydraulic valve with high pressure and large flow |
| CN117927689A (en) * | 2024-03-21 | 2024-04-26 | 成都乘风阀门有限责任公司 | High-pressure sealing structure for valve |
-
2012
- 2012-02-17 CN CN2012200515803U patent/CN202469014U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563096A (en) * | 2012-02-17 | 2012-07-11 | 无锡市亚迪流体控制技术有限公司 | Ultrahigh pressure differential tight cut-off regulating valve |
| CN102563096B (en) * | 2012-02-17 | 2013-05-01 | 无锡市亚迪流体控制技术有限公司 | Ultrahigh pressure differential tight cut-off regulating valve |
| CN103123004A (en) * | 2013-01-21 | 2013-05-29 | 中国航天空气动力技术研究院 | Hydraulic valve with high pressure and large flow |
| CN103123004B (en) * | 2013-01-21 | 2015-07-22 | 中国航天空气动力技术研究院 | Hydraulic valve with high pressure and large flow |
| CN117927689A (en) * | 2024-03-21 | 2024-04-26 | 成都乘风阀门有限责任公司 | High-pressure sealing structure for valve |
| CN117927689B (en) * | 2024-03-21 | 2024-05-24 | 成都乘风阀门有限责任公司 | High-pressure sealing structure for 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: 20121003 Effective date of abandoning: 20130501 |
|
| RGAV | Abandon patent right to avoid regrant |