CN108662217B - Composite butterfly check valve - Google Patents
Composite butterfly check valve Download PDFInfo
- Publication number
- CN108662217B CN108662217B CN201810721212.7A CN201810721212A CN108662217B CN 108662217 B CN108662217 B CN 108662217B CN 201810721212 A CN201810721212 A CN 201810721212A CN 108662217 B CN108662217 B CN 108662217B
- Authority
- CN
- China
- Prior art keywords
- valve
- hole
- blind hole
- valve rod
- butterfly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
- F16K15/1821—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for check valves with a hinged or pivoted closure member
Abstract
The invention discloses a composite butterfly check valve, which comprises a valve body and a valve rod, wherein the valve body is provided with a valve core runner, a valve core assembly is arranged in the valve core runner, and the valve core assembly comprises: the check plate is hinged in the valve core flow passage and used for closing or opening the inlet, and a valve hole is formed in the check plate; the butterfly plate is rotatably arranged in the valve hole through a second rotating shaft, a blind hole is formed in the upper part of the butterfly plate, and a blind hole guide groove is formed in the wall of the blind hole; the through hole is vertically arranged at the upper part of the check plate, and a through hole guide groove is formed in the wall of the through hole; the limiting shaft is inserted into the blind hole, and a limiting shaft guide block is convexly arranged on the peripheral wall of the limiting shaft; a return spring mounted in the blind hole; the valve rod guide block matched with the blind hole guide groove is convexly arranged on the periphery of the driving end of the valve rod, and the valve rod is in sliding and rotating sealing fit with the valve body. The invention has the functions of the check valve and the butterfly valve, thereby expanding the application working condition of the valve.
Description
Technical Field
The invention relates to a check valve, in particular to a composite butterfly check valve.
Background
The check valve allows media flow in one direction only and when fluid flows in the opposite direction, the check valve spool is closed by the action of fluid pressure, thereby shutting off the flow of media. The butterfly valve is a simple regulating valve, its closing member (valve clack or check plate) is a disk, and can be rotated around valve shaft to open and close, and can be used for on-off control of low-pressure pipeline medium. The butterfly valve is used as a regulating valve and can regulate the flow characteristics of the flowing medium.
With the continuous development of industry, the engineering application scenes of the valve are more and more, and the functional requirements on the valve are higher and higher. However, the existing valve has more or less defects, such as single function, limited application occasions, incapability of meeting complex working condition requirements, and the like. Therefore, how to combine the functional advantages of the check valve and the butterfly valve is ensured, so that the combined valve can adapt to and meet more application places, and the direction of research and development of the future people is formed. The Chinese patent is granted as 2016, 6 and 8 days, and the patent number is CN201520917256.9, namely a dual-purpose butterfly check valve, wherein a first valve seat and a second valve seat are arranged in a valve body, a check plate is arranged on the first valve seat, and a check plate is arranged on the second valve seat, so that the functions of a butterfly valve and a check valve are realized simultaneously. The publication date of the Chinese patent is 2016, 12 and 7, and the patent number is CN201620445726.0, namely an integrated butterfly valve and check valve loose joint structure, and the butterfly valve and the check valve can be conveniently connected for use through the designed loose joint structure.
However, the above valve structure still exists and is not perfect, such as: the butterfly valve and the check valve are simply installed in the same flow passage structure through superposition, and the advantages of the two valves cannot be well reflected due to simple superposition combination.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the composite butterfly check valve which is reasonable in structure and has the functions of a check valve and a butterfly valve, so that the applied working condition of the composite butterfly check valve is expanded, and the service life of the composite butterfly check valve is prolonged.
The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides a compound butterfly check valve, is located the valve rod in the valve body including the valve body that is equipped with fluid passage and one end, and fluid passage is including advancing runner, case runner and going out the runner, installs in the case runner with the valve rod cooperate and be used for sealing or open the case assembly that advances the runner, it is the import to advance the opening that runner department and case runner meet, the case assembly includes:
the check plate is hinged in the valve core flow passage through a first rotating shaft and used for closing or opening the inlet, and the check plate is provided with a valve hole used for communicating areas on two sides of the check plate;
the second rotating shaft is vertically arranged at the lower part of the valve hole and is positioned in the same plane with the valve hole;
the butterfly plate is rotatably arranged in the valve hole through a second rotating shaft and used for closing or opening the valve hole, the butterfly plate is consistent with the cross section of the valve hole, a blind hole which is positioned on the same straight line with the second rotating shaft is formed in the upper part of the butterfly plate, and a blind hole guide groove which is arranged along the length direction of the blind hole and is parallel to the second rotating shaft is formed in the hole wall of the blind hole;
the through hole is vertically arranged at the upper part of the check plate and is opposite to the opening position of the blind hole, and a through hole guide groove which is arranged along the length direction of the through hole and is positioned on the same straight line with the blind hole guide groove is arranged on the wall of the through hole;
the limiting shaft is inserted into the blind hole, a limiting shaft guide block matched with the blind hole guide groove and the through hole guide groove respectively is convexly arranged on the peripheral wall of the limiting shaft, and the length of the limiting shaft is shorter than the depth of the blind hole;
the reset spring is arranged in the blind hole and is used for driving the part of the limiting shaft guide block to enter the through hole guide groove;
the valve rod and the blind hole are positioned on the same straight line, the end part of the valve rod, which is positioned in the valve body, is a driving end, a valve rod guide block matched with the blind hole guide groove is convexly arranged on the peripheral side of the driving end, and the valve rod and the valve body are in sliding and rotating sealing fit.
The invention has the beneficial effects that: the valve rod and the valve body are in sliding and rotating sealing fit, namely a valve rod hole for the valve rod to penetrate through is formed in the valve body, the valve rod can slide and rotate in the valve rod hole, and the valve rod keeps in sealing fit while sliding and rotating; in prior art valve constructions, the same or similar sealing structures have been disclosed for both the valve stem and the valve body. The butterfly plate rotates in the valve hole through the second rotating shaft, so that the valve hole is opened or closed, namely the butterfly plate rotates around the second rotating shaft, and the butterfly plate and the valve hole are located on the same plane at the moment, so that the butterfly plate completely blocks the valve hole; the butterfly plate rotates around the second rotating shaft, and at the moment, the butterfly plate forms an included angle with the valve hole, so that the butterfly plate and the valve hole are staggered with each other to open the valve hole. In addition, the butterfly plate forms spacing cooperation through spacing axle in blind hole department and the last through-hole of check plate, and here restriction means that spacing axle is restricted around the revolute motion pair of axial. The limiting shaft guide block on the limiting shaft and the blind hole guide groove on the butterfly plate form circumferential limiting, so that the limiting shaft cannot rotate in the blind hole and can only slide along the axial direction of the blind hole. Similarly, the limiting shaft guide block on the limiting shaft and the through hole guide groove on the check plate form circumferential limiting, namely, the limiting shaft cannot rotate in the through hole and can only slide along the axial direction. Therefore, when the limiting shaft is located in the blind hole and the through hole, the butterfly plate cannot rotate around the second rotating shaft, and the check plate can block fluid from passing through the valve hole. The check plate rotates around the first rotating shaft, so that the inlet is closed or opened, the check plate is not different from a common check valve, and fluid rushes away the check plate during downstream flow; in reverse flow, the fluid carries the check plate to close the inlet. When the check plate is closed, if the function of a butterfly valve needs to be exerted, the valve rod is driven to move towards the through hole, and when the driving end of the valve rod enters the through hole, the driving end pushes the end part of the limiting shaft, so that the limiting shaft overcomes the elastic force, exits from the through hole and enters the blind hole. After the limiting shaft completely enters the blind hole, the rotation limitation of the butterfly plate is removed, so that the butterfly plate can rotate around the second rotating shaft as required. And the valve rod guide block on the valve rod driving end is matched with the blind hole guide groove, and when the valve rod guide block is inserted into the blind hole guide groove, the valve rod and the butterfly plate are in a circumferential rotation limiting fit, namely, the valve rod is rotated, and the butterfly plate can be driven to rotate. Therefore, the valve rod can control the size of the opening of the valve hole, namely, the function of a butterfly valve is achieved. The invention has the functions of the check valve and the butterfly valve, thereby expanding the application working condition of the valve.
In order to conveniently realize the driving of the valve rod, a telescopic cylinder is fixed on the valve body, and a telescopic rod of the telescopic cylinder is coaxially fixed with the valve rod and is used for driving the driving end of the valve rod to enter or exit the blind hole; the telescopic rod or the valve rod is provided with a handle for driving the telescopic rod to rotate. The telescopic rod on the telescopic cylinder realizes the extension and retraction of the valve rod. The telescopic cylinder can adopt air cylinders, hydraulic cylinders and the like.
In order to prevent the limiting shaft from being separated from the through hole and improve the working stability of the limiting shaft, the reset spring is arranged at the bottom of the blind hole, two shaft ends of the reset spring are fixedly connected with the blind hole and the limiting shaft respectively, the length and the elasticity of the reset spring are controlled, so that the limiting shaft is simultaneously positioned in the blind hole and the through hole in the natural state of the reset spring, and the limiting shaft guide block on the limiting shaft can ensure that the butterfly plate and the check plate are kept relatively static.
In order to prevent the spacing axle from deviating from the through-hole, improve the stability of spacing axle work, can also adopt the second kind of embodiment, install the anticreep dog that is used for preventing spacing axle from deviating from in the through-hole.
In order to prevent the limiting shaft from being separated from the through hole and improve the working stability of the limiting shaft, a third embodiment can be adopted, a first magnetic part is arranged at the driving end of the valve rod, a second magnetic part is arranged at the end part, opposite to the driving end of the valve rod, of the limiting shaft, and magnetic force between the first magnetic part and the second magnetic part is repellent. And due to the action of the magnetic part, the contact impact between the valve rod driving end and the limiting shaft can be avoided to the greatest extent, the abrasion is reduced, and the maintenance cost is reduced.
In order to prevent the limiting shaft from being separated from the through hole, a third magnetic part which is magnetically attracted with the second magnetic part is arranged on the wall of the through hole, and the second magnetic part is attracted by the third magnetic part, namely, the possibility that the limiting shaft is separated from the through hole is reduced.
The upper part of the valve rod is provided with a lug; the valve rod is also sleeved with a steering sleeve, the steering sleeve is attached to the surface of the valve body and is in running fit with the valve body, and the upper part of the steering sleeve is provided with a notch for the lug to enter or exit. When the lug on the valve rod gets into the breach to form the circumferential direction and rotate the linkage, when rotating the steering sleeve promptly, the valve rod also can rotate along with it, whole simple structure, convenient operation.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a check plate according to an embodiment of the present invention, with a butterfly plate omitted.
FIG. 3 is a cross-sectional view of a check plate according to an embodiment of the present invention.
FIG. 4 is a schematic view of the check plate and valve stem assembly of an embodiment of the present invention.
Fig. 5 is a schematic structural view of a limiting shaft according to an embodiment of the invention.
FIG. 6 is a schematic view of a valve stem according to an embodiment of the present invention.
FIG. 7 is a schematic view of a steering sleeve according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the first embodiment is as follows: as shown in fig. 1 to 7, the present embodiment includes a valve body 1 provided with a fluid channel 2 and a valve rod 3 having one end located in the valve body 1, the fluid channel 2 includes an inlet channel 21, a valve core channel 22 and an outlet channel 23, a valve core assembly 4 which is matched with the valve rod 3 and used for closing or opening the inlet channel is installed in the valve core channel 22, and an opening at the inlet channel 21 and connected with the valve core channel 22 is an inlet 211. The valve core assembly 4 comprises a check plate 42 which is connected in the valve core flow passage 22 through a first rotating shaft hinge 41 and is used for closing or opening an inlet, a valve hole 423 used for communicating areas at two sides of the check plate 42 is formed in the check plate 42, a second rotating shaft 43 which is vertically installed is arranged at the lower part of the valve hole 423, and the second rotating shaft 43 and the valve hole 423 are positioned on the same plane. Here, the fact that the valve hole 423 communicates with the regions on both sides of the check plate 42 means that, when the valve hole 423 is in an open state, fluid on one side of the check plate 42 can pass through the valve hole 423 to the other side. The valve hole 423 is further internally provided with a butterfly plate 44 rotating around the second rotating shaft 43, the butterfly plate 44 is consistent with the cross section of the valve hole 423 (that is, when the butterfly plate 44 rotates to the plane of the valve hole 423, the butterfly plate 44 can completely cover the valve hole 423, at this time, the outer periphery of the butterfly plate 44 forms a hard sealing fit with the inner periphery of the valve hole 423), the upper part of the butterfly plate 44 is provided with a blind hole 441 positioned on the same straight line with the second rotating shaft 43, and the hole wall of the blind hole 441 is provided with a blind hole guide groove 442 arranged along the length direction of the blind hole 441 and parallel to the second rotating shaft 43. The upper portion of the check plate 42 is provided with a through hole 421 vertically arranged, the through hole 421 is opposite to the opening of the blind hole 441, and the hole wall of the through hole 421 is provided with a through hole guide groove 422 arranged along the length direction of the through hole 421 and located on the same straight line with the blind hole guide groove 442. A limiting shaft 45 is inserted into the blind hole 441, a limiting shaft guide block 451 respectively matched with the blind hole guide groove 441 and the through hole guide groove 422 is convexly arranged on the peripheral wall of the limiting shaft 45, and the length of the limiting shaft 45 is shorter than the depth of the blind hole 441. The butterfly plate 44 forms a limit fit with the through hole 421 of the check plate 42 through the limit shaft 45 at the blind hole 441, where the limit means that the rotation of the limit shaft 45 around the axial direction is limited. The limiting shaft guide block 451 on the limiting shaft 45 and the blind hole guide groove 441 on the butterfly plate 44 form circumferential limiting, so that the limiting shaft 45 cannot rotate in the blind hole 441 and can only slide along the axial direction of the blind hole 441. Similarly, the limiting shaft guide block 451 on the limiting shaft 45 and the through hole guide groove 422 on the check plate 42 form a circumferential limitation, that is, the limiting shaft 45 cannot rotate in the through hole 421 and can only slide in the axial direction. Therefore, when the limiting shaft is located in the blind hole 441 and the through hole 421, the butterfly plate 44 cannot rotate around the second rotating shaft 43, so that the check plate 42 can block the fluid from passing through the valve hole 423.
The bottom of the blind hole 421 is further provided with a return spring 46, two shaft ends of the return spring 46 are respectively fixedly connected with the blind hole 441 and the limiting shaft 45, and the limiting shaft guide block 451 is driven by the return spring 46 to partially enter the through hole guide groove 422. The valve rod 3 and the blind hole 441 are located on the same straight line, the end part of the valve rod 3 located in the valve body 1 is a driving end 31, a valve rod guide block 311 matched with the blind hole guide groove 442 is convexly arranged on the peripheral side of the driving end 31, and the valve rod 3 is in sliding and rotating sealing fit with the valve body 1. The valve rod 3 and the valve body 1 are in sliding and rotating sealing fit, that is, a valve rod hole for the valve rod 3 to penetrate is formed in the valve body 1, the valve rod 3 can slide and rotate in the valve rod hole, and the sliding and rotating valve rod can keep sealing fit. The valve rod 3 is driven to move towards the through hole 421, when the driving end 31 of the valve rod 3 enters the through hole 421, the driving end 31 pushes the end of the limiting shaft 45, so that the limiting shaft 45 overcomes the elastic force, exits the through hole 421 and enters the blind hole 441. When the stopper shaft 45 completely enters the blind hole 441, the rotation restriction of the butterfly plate 44 is released, so that the butterfly plate 44 can rotate around the second rotating shaft 43 as required. And the valve rod guide block 311 on the driving end 31 of the valve rod 3 is matched with the blind hole guide slot 442, and the butterfly plate 44 can be driven to rotate by rotating the valve rod 3 at the moment. Here, the stem guide 311 only forms a limit fit with the blind hole guide slot 442, that is, the stem guide 311 does not form a limit fit with the through hole guide slot 422, specifically, by limiting the length of the stem guide 311 and controlling the depth of the stem guide 311 entering the through hole guide slot 422, it is ensured that the stem guide 311 is not located in the through hole guide slot 422 when the driving valve 3 rotates.
A telescopic cylinder 5 is fixed on the valve body 1, and a telescopic rod of the telescopic cylinder 5 is coaxially fixed with the valve rod 3 and used for driving the driving end 31 of the valve rod 3 to enter or exit the blind hole 441; a handle for driving the telescopic rod to rotate is arranged on the valve rod 3. The upper part of the valve rod 3 is provided with a lug 32; here, the handle is a steering sleeve 6 sleeved on the valve rod 3, the steering sleeve 6 is attached to the surface of the valve body 1 and is rotatably matched with the valve body 1, and the upper part of the steering sleeve 6 is provided with a notch 61 for the lug 32 to enter or exit. When lug 32 on valve rod 3 gets into breach 61 to form the circumferential direction and rotate the linkage, when rotating steering sleeve 6, valve rod 3 also can rotate along with it, whole simple structure, convenient operation.
In this embodiment, the check plate 42 is a one-way check, and when the fluid moves from the inlet channel 21 to the outlet channel 23, the check plate 42 can be flushed away by the fluid; when the fluid moves from the outlet channel 23 to the inlet channel 21, the fluid carries the check plate 42 to rotate around the first rotating shaft 41 and drives the check plate 42 to cover the inlet 211. The check plate 42 here operates on the same principle as the valve plate in the prior art partial check valve.
The second embodiment: the difference from the first embodiment is that an anti-slip stopper for preventing the limiting shaft 45 from slipping out of the through hole 421 is installed at the opening of the through hole 421, and the anti-slip stopper is not arranged to obstruct the driving end 31 of the valve rod 3 from entering and exiting. The concrete scheme does, control valve rod 3's size to make valve rod 3 avoid anticreep dog position, make in valve rod 3 can freely come in and go out through-hole 421, when valve rod 3 rotated simultaneously, anticreep dog, mutual noninterference each other can be avoided to valve rod 3 and valve rod 3 upper valve rod guide block 311. Wherein, the anti-dropping block can be disposed at the opening of the through hole 421, and also disposed at the middle or middle lower part of the through hole 421, as long as it can not interfere the entering of the spacing shaft 45, and it can prevent the spacing shaft 45 from dropping off. In this embodiment, the structure is clear, and the size of the valve rod 3 and the valve rod guide block 311 on the valve rod 3 can be controlled, so the explanation is not shown.
Example three: the difference from the first embodiment is that a first magnetic member is arranged at the driving end 31 of the valve rod 3, a second magnetic member is arranged at the end part of the limiting shaft 45 opposite to the driving end 31 of the valve rod 3, and magnetic force between the first magnetic member and the second magnetic member is repulsive. The hole wall of the through hole 421 is provided with a third magnetic member magnetically attracted to the second magnetic member, and the third magnetic member attracts the second magnetic member, that is, the possibility that the limiting shaft 45 is disengaged from the through hole is reduced.
In the invention, the second rotating shaft shown in fig. 1 is in a vertical direction, and the vertical direction herein does not only refer to the view angle shown in the figure, for example, if the whole valve deflects, the second rotating shaft can also deflect, and the valve rod, the blind hole and the through hole only need to keep the same direction with the second rotating shaft, and the conversion of the angle does not affect the protection scope of the patent.
Claims (7)
1. The utility model provides a compound butterfly check valve, is located the valve rod in the valve body including the valve body that is equipped with fluid passage and one end, and fluid passage is including advancing runner, case runner and going out the runner, installs in the case runner with the valve rod cooperate and be used for sealing or open the case assembly that advances the runner, characterized by, the opening that advances runner department and case runner meet is the import, the case assembly includes:
the check plate is hinged in the valve core flow passage through a first rotating shaft and used for closing or opening the inlet, and the check plate is provided with a valve hole used for communicating areas on two sides of the check plate;
the second rotating shaft is vertically arranged at the lower part of the valve hole and is positioned in the same plane with the valve hole;
the butterfly plate is rotationally arranged in the valve hole through a second rotating shaft and used for closing or opening the valve hole, the butterfly plate is consistent with the cross section of the valve hole, the upper part of the butterfly plate is provided with a blind hole which is positioned on the same straight line with the second rotating shaft, and the wall of the blind hole is provided with a blind hole guide groove which is arranged along the length direction of the blind hole and is parallel to the second rotating shaft;
the through hole is vertically arranged at the upper part of the check plate and is opposite to the opening position of the blind hole, and a through hole guide groove which is arranged along the length direction of the through hole and is positioned on the same straight line with the blind hole guide groove is arranged on the wall of the through hole;
the limiting shaft is inserted into the blind hole, a limiting shaft guide block matched with the blind hole guide groove and the through hole guide groove respectively is convexly arranged on the peripheral wall of the limiting shaft, and the length of the limiting shaft is shorter than the depth of the blind hole;
the reset spring is arranged in the blind hole and is used for driving the part of the limiting shaft guide block to enter the through hole guide groove;
the valve rod and the blind hole are positioned on the same straight line, the end part of the valve rod, which is positioned in the valve body, is a driving end, a valve rod guide block matched with the blind hole guide groove is convexly arranged on the peripheral side of the driving end, and the valve rod and the valve body are in sliding and rotating sealing fit.
2. The composite butterfly check valve of claim 1, wherein: a telescopic cylinder is fixed on the valve body, a telescopic rod of the telescopic cylinder is coaxially fixed with the valve rod and is used for driving the driving end of the valve rod to enter or exit the blind hole; the telescopic rod or the valve rod is provided with a handle for driving the telescopic rod to rotate.
3. The composite butterfly check valve of claim 1, wherein: the reset spring is installed at the bottom of the blind hole, and two shaft ends of the reset spring are respectively and fixedly connected with the blind hole and the limiting shaft.
4. The composite butterfly check valve of claim 1, wherein: and an anti-falling stop block for preventing the limiting shaft from falling off from the through hole is arranged in the through hole.
5. The composite butterfly check valve of claim 1, wherein: the valve rod driving end is provided with a first magnetic part, the end part, opposite to the valve rod driving end, of the limiting shaft is provided with a second magnetic part, and magnetic force between the first magnetic part and the second magnetic part is repellent.
6. The composite butterfly check valve of claim 5, wherein: and a third magnetic part which is attracted with the second magnetic part by magnetic force is arranged on the wall of the through hole.
7. The composite butterfly check valve of claim 1, wherein: the upper part of the valve rod is provided with a lug; the valve rod is also sleeved with a steering sleeve, the steering sleeve is attached to the surface of the valve body and is in running fit with the valve body, and the upper part of the steering sleeve is provided with a notch for the lug to enter or exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721212.7A CN108662217B (en) | 2018-06-30 | 2018-06-30 | Composite butterfly check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721212.7A CN108662217B (en) | 2018-06-30 | 2018-06-30 | Composite butterfly check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108662217A CN108662217A (en) | 2018-10-16 |
| CN108662217B true CN108662217B (en) | 2023-04-18 |
Family
ID=63772733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810721212.7A Active CN108662217B (en) | 2018-06-30 | 2018-06-30 | Composite butterfly check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108662217B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019116509B4 (en) * | 2019-06-18 | 2023-05-04 | Pierburg Gmbh | Valve device for an internal combustion engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11230388A (en) * | 1998-02-13 | 1999-08-27 | Mitsubishi Heavy Ind Ltd | Check butterfly valve |
| CN202252165U (en) * | 2011-10-10 | 2012-05-30 | 铁岭方众阀门有限公司 | Swing micro-resistance slow closing check valve |
| CN203686266U (en) * | 2013-12-26 | 2014-07-02 | 方正阀门集团有限公司 | Dual-purpose butterfly check valve |
| CN206145149U (en) * | 2016-11-09 | 2017-05-03 | 胜利阀门有限公司 | Hydraulic control slow -closure butterfly check valve |
| CN207333839U (en) * | 2017-04-11 | 2018-05-08 | 天津市盛亿德阀门有限公司 | A kind of new butterfly swing check valve |
| KR20180068142A (en) * | 2016-12-13 | 2018-06-21 | 동아대학교 산학협력단 | Butterfly Type Check Valve |
-
2018
- 2018-06-30 CN CN201810721212.7A patent/CN108662217B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11230388A (en) * | 1998-02-13 | 1999-08-27 | Mitsubishi Heavy Ind Ltd | Check butterfly valve |
| CN202252165U (en) * | 2011-10-10 | 2012-05-30 | 铁岭方众阀门有限公司 | Swing micro-resistance slow closing check valve |
| CN203686266U (en) * | 2013-12-26 | 2014-07-02 | 方正阀门集团有限公司 | Dual-purpose butterfly check valve |
| CN206145149U (en) * | 2016-11-09 | 2017-05-03 | 胜利阀门有限公司 | Hydraulic control slow -closure butterfly check valve |
| KR20180068142A (en) * | 2016-12-13 | 2018-06-21 | 동아대학교 산학협력단 | Butterfly Type Check Valve |
| CN207333839U (en) * | 2017-04-11 | 2018-05-08 | 天津市盛亿德阀门有限公司 | A kind of new butterfly swing check valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108662217A (en) | 2018-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108662217B (en) | Composite butterfly check valve | |
| WO2008114036A8 (en) | Pilot valve for a pressure reducing valve | |
| KR20160072556A (en) | Stopper Check Valve | |
| CN205806509U (en) | The throttling stop valve of multi-level control structure | |
| AU2011204820A1 (en) | Advanced fluidics gate valve with active flow control for subsea applications | |
| ITMI20120183A1 (en) | VALVE EQUIPPED WITH A BYPASS CHANNEL | |
| CN110345284A (en) | A kind of check-valves | |
| US6315264B1 (en) | Fast-closing stepping actuator for a valve member | |
| CN103836237B (en) | Fusiformis is adjustable non-return valve | |
| CN209892782U (en) | Ball gate regulating valve | |
| CN201145084Y (en) | Fluid-control valve switching speed control device | |
| CN111536253A (en) | Ball valve with long service life | |
| CN106605090A (en) | Rotating valve trim | |
| CN106763934B (en) | Double-drive quick-closing lifting type non-return and stop combined valve | |
| CN208364871U (en) | Compound butterfly swing check valve | |
| CN108533804A (en) | Compound butterfly swing check valve | |
| CA2389732A1 (en) | Wellbore system having non-return valve | |
| CN2729459Y (en) | Adjustable valve for two-phase mixed medium | |
| EP1818585B1 (en) | Non-return valve | |
| KR101407905B1 (en) | A piston type opening and closing valve with a linear flow path | |
| JP3758934B2 (en) | 2-port valve | |
| CN112283369A (en) | Stop valve | |
| US1555817A (en) | Control valve | |
| CN216479080U (en) | Flange valve | |
| CN210461901U (en) | Ball valve with handle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |