CN104373639B - Double plate butterfly swing check valves with shunting fan lobe - Google Patents
Double plate butterfly swing check valves with shunting fan lobe Download PDFInfo
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- CN104373639B CN104373639B CN201410556391.5A CN201410556391A CN104373639B CN 104373639 B CN104373639 B CN 104373639B CN 201410556391 A CN201410556391 A CN 201410556391A CN 104373639 B CN104373639 B CN 104373639B
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- shunting
- lobe
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- shunting fan
- swing check
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- 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
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
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- 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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of double plate butterfly swing check valves with shunting fan lobe.The same side of two pieces of semicircle valve plates of double plate butterfly swing check valves is equipped with seven pieces of symmetrical, structure is identical shunting fan lobes；In seven pieces of shunting fan lobes that structure is identical, its any block shunting fan lobe, formed for the bus that semi arch top is straight line rotates 180 ° around centrage bottom it, its bus is 10 ° with the angle a of centrage；Angle between the shunting fan lobe centrage of adjacent two pieces is 20 °.The present invention, when check-valves backflow is closed, utilizes the additional force of shunting fan lobe to strengthen its sealing property；When check-valves is opened, utilization shunting fan lobe shunting decompression, reduce the relatively big impulsive force to valve plate of rate of flow of fluid and prevent valve plate partially due to the cavitation of local depression generation, stoping the generation of water hammer；It is not required to band operation controlling organization, is not required to, with damping unit, also be not required to install additional the balance weight of balance valve plate gravity.Can be used for the fields such as oil, chemical industry and water conservancy.
Description
Technical field
The present invention relates to a kind of double plate butterfly swing check valve, especially relate to a kind of double plate butterfly swing check valves with shunting fan lobe.
Background technology
Butterfly swing check valve refers to rely on medium itself to flow and automatic open and close valve plate, is used for the valve preventing medium from flowing backwards, also known as non-return valve, check valve, reflux valve and counterbalance valve.Check-valves belongs to a kind of automatic valve, and its Main Function is to prevent medium from flowing backwards, prevent pump and drive motor reversion, and the releasing of vessel media.Butterfly swing check valve can be additionally used in and may be raised above on the pipeline of aid system offer supply of system pressure to pressure therein.Butterfly swing check valve can be divided mainly into two kinds: one is double-plate, another kind of one-board.
Folder is the most all connected by double plate butterfly swing check valves, seldom uses double Flange joint form.This check-valves is substantially all for petrochemical industry and other industry, can be suitably used for horizontally and vertically pipeline, but owing to it is different from veneer butterfly swing check valve, so design standard is more.Check-valves, according to the difference of material, goes on the pipeline of various medium.Butterfly swing check valve is similar to that butterfly valve.Its simple in construction, flow resistance are less.
The work characteristics of double plate butterfly swing check valves is that load change is big, opens and closes frequency little, once puts into and turns off or on state, and the applicable cycle is the longest, and does not require that moving component moves.Due to double plate butterfly swing check valves most of actually used in, qualitatively determine for quick closedown, and the moment closed at double plate butterfly swing check valves, medium is direction flowing, closedown along with valve plate, medium is rapidly decreased to zero from maximum refluence speed, and pressure raises the most rapidly, and i.e. produce to have " water hammer " phenomenon of destruction to pipe-line system.The high-pressure duct system being suitable for for multiple stage parallel connection of pumps, the problem of water hammer of double plate butterfly swing check valves is more prominent.Water hammer is a kind of pressure wave in pressure pipeline in transient flow, and it is the hydraulic blow phenomenon jumping due to the change of rate of flow of fluid and the pressure liter that causes in pressure pipeline or declining.Its physical cause produced is the comprehensive function result that the Incoercibility of fluid, fluid motional inertia and pipeline are elastic.In order to prevent the water hammer hidden danger in pipeline, for many years, people are in the design of double plate butterfly swing check valves, have employed some new constructions, new material, while ensureing double plate butterfly swing check valve applicable performance, the impulsive force of water hammer is minimized aspect and achieves gratifying progress, but but seldom inquire in design.And it is applied to the element in this special environment, it is necessary to also there is corresponding survivability to avoid fluid that corrosion and the temporary impact of sealing surface are destroyed.Thus extend the normal operation life-span of valve.
Therefore, the double plate butterfly swing check valve valve inner flow mechanism of research and the Rational structure of double plate butterfly swing check valve, reduce rate of flow of fluid change greatly the impulsive force to valve plate and prevent valve plate partially due to local depression produce cavitation, stop the generation of water hammer, improve the efficiency of butterfly valve and just seem service life extremely important.
Summary of the invention
In order to overcome the deficiency of double plate butterfly swing check valves in background technology, it is an object of the invention to provide a kind of double plate butterfly swing check valves with shunting fan lobe, reduce rate of flow of fluid change greatly the impulsive force to valve plate and prevent valve plate partially due to local depression produce cavitation, stop the generation of water hammer, adapt to work under poor environment, improve valve service life and the effect of stability.
The technical solution used in the present invention is:
The present invention includes double plate butterfly swing check valve, is equipped with seven pieces of symmetrical, structure is identical shunting fan lobes on the same side of two pieces of semicircle valve plates of double plate butterfly swing check valves.
In seven pieces of shunting fan lobes that described structure is identical, its any block shunting fan lobe, formed for the bus that semi arch top is straight line rotates 180 ° around centrage bottom it, its bus is 10 ° with the angle a of centrage；Angle between the shunting fan lobe centrage of adjacent two pieces is 20 °.
Described every piece of shunting fan lobe is semicircle valve plate edge to 0.5～0.7 times of distance H at semicircle valve plate center near the shunting fan lobe summit of double plate butterfly swing check valve spring sides to bottom lengths, and it is round with semicircle valve plate edge chamfer tangent that lobe semi arch is fanned in every piece of shunting.
The radius of described every piece of shunting fan lobe bus semi arch is semicircle valve plate edge to 0.06 times of distance H at semicircle valve plate center, and the distance on semi arch top to semicircle valve plate edge is semicircle valve plate edge to 0.01 times of distance H at semicircle valve plate center.
The invention have the advantages that:
The present invention is by combining shunting decompression and anti-cavitation principle and sealing some shortcomings of structure solution butterfly swing check valve.Make full use of the shunting fan lobe of design on two pieces of semicircle valve plates of double plate butterfly swing check valve, when check-valves backflow is closed, utilize the additional force of the shunting fan lobe on two pieces of semicircle valve plates to strengthen its sealing property；When check-valves is opened, utilize the shunting fan lobe shunting decompression on two pieces of semicircle valve plates, reduce rate of flow of fluid relatively greatly to the impulsive force of valve plate and prevent valve plate partially due to the cavitation that produces of local depression；Additionally, in fluid delivery process, due to valve be turned on and off suddenly, etc. reason, make rate of flow of fluid that change suddenly to occur, when pressure generation simultaneously causes water attack i.e. water hammer when fluctuating widely, the shunting fan lobe of design on two pieces of semicircle valve plates of this pair of plate butterfly swing check valve can stop it to occur.This valve need not band operation controlling organization, it is not required that with damping unit, it is not required that install the balance weight of balance valve plate gravity additional.
The present invention can meet the demand in the fields such as oil, chemical industry and water conservancy.
Accompanying drawing explanation
Fig. 1 is the double plate butterfly swing check valve front view of the present invention.
Fig. 2 is the sectional view of the section B-B of Fig. 1.
Fig. 3 is two pieces of fully closed front views of semicircle valve plate with shunting fan lobe of the present invention.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the graphics that the present invention is fully closed with shunting the two pieces of semicircle valve plates fanning lobe.
Fig. 6 is the graphics of Fig. 5 reverse side.
Fig. 7 is the Fig. 5 graphics when a certain operating position.
In figure: 1, valve body, 2, two pieces of semicircle valve plates, 3, two bearing pins, 4, spring, 5, spacer ring, 6, rivet, 7, nameplate, 8, shunting fan lobe, 9, axle is installed.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, Figure 6 shows, the present invention includes valve body 2, two bearing pins 3 of 1, two pieces of semicircle valve plates, spring 4, spacer ring 5, rivet 6, nameplate 7, installs axle 9；It is outside for fixing its installation nameplate 7 that rivet 6 is arranged on valve body 1；The spacer ring 5 being fixed on valve body 1 upper pin 3 and installation axle 9 is used for fixing spring 4, and divides equally its axial compressive force and determine its limit tolerance installed；When valve rotates along installation axle 9, after medium enters valve, it is designed with the most past rear-inclined of two pieces of semicircle valve plates 2 of shunting fan lobe 8, until fully opening.During medium back flow, the two pieces of semicircle valve plates 2 being designed with shunting fan lobe 8 may be pivoted to closed position, and the effect at medium is issued to seal.
Lobes 8 are fanned in seven pieces of shuntings that structure described in Fig. 1 is identical, and it is particularly shown figure at Fig. 3, Fig. 4, Fig. 5.
Such as Fig. 3, Fig. 4, Fig. 5, shown, the same side of two pieces of semicircle valve plates 2 of double plate butterfly swing check valves is equipped with seven pieces of symmetrical, structure is identical shunting fan lobes 8.
As shown in Fig. 3, Fig. 4, Fig. 5, in seven pieces of shunting fan lobes 8 that described structure is identical, its any block shunting fan lobe 8, formed for the bus that semi arch top is straight line rotates 180 degree around centrage bottom it, its bus is 10 ° with the angle a of centrage；Angle between shunting fan lobe 8 centrage of adjacent two pieces is 20 °.
As shown in Figure 3, Figure 4, described every piece of shunting fan lobe 8 is semicircle valve plate 2 edge to 0.5～0.7 times of distance H at semicircle valve plate 2 center near shunting fan lobe 8 summit of double plate butterfly swing check valve spring 4 sides to bottom lengths, and it is round with semicircle valve plate 2 edge chamfer tangent that lobe 8 semi arch is fanned in every piece of shunting.
As shown in Figure 4, the radius of described every piece of shunting fan lobe 8 bus semi arch is semicircle valve plate 2 edge to 0.06 times of the H of semicircle valve plate 2 centre distance, and the distance on semi arch top to semicircle valve plate edge is semicircle valve plate edge to 0.01 times of distance H at semicircle valve plate center.
As it is shown in fig. 7, a certain aperture that the described double plate butterfly swing check valves with shunting fan lobe 8 are operationally.
It is contemplated that by combining shunting decompression and anti-cavitation principle and sealing some shortcomings of structure solution butterfly swing check valve.Make full use of the shunting fan lobe of design on two pieces of semicircle valve plates of double plate butterfly swing check valve, when check-valves backflow opens and closes, the additional force utilizing the shunting fan lobe on two pieces of semicircle valve plates strengthens its sealing property, shunting decompression, reduces rate of flow of fluid relatively greatly to the impulsive force of valve plate and prevent valve plate partially due to the cavitation that produces of local depression；Stop due to valve be turned on and off suddenly, etc. reason, and the water attack caused i.e. water hammer.
Operation principle and the work process of the present invention are as follows:
1) the shunting fan lobe of design on two pieces of semicircle valve plates of double plate butterfly swing check valves, rotates along installing axle at valve, and after medium enters valve, two pieces of semicircle valve plates are just toward rear-inclined (as shown in Figure 7), until fully opening.During medium back flow, two pieces of valve plates may be pivoted to closed position, and the effect at medium is issued to seal.
2) when the two pieces of semicircle valve plates of double plate butterfly swing check valves with shunting fan lobe open and close under medium effect, lobe is fanned in the shunting that two pieces of semicircle valve plates design, will when valve opening shunting decompression；When valve closing, prevent the generation of water hammer.
Double plate butterfly swing check valves of the present invention are with shunting fan lobe, when fluid media (medium) passes through tubing, when opening the double plate butterfly swing check valve with shunting fan lobe, it is too fast that the shunting fan lobe with equal number designed on two pieces of semicircle valve plates can reduce valve opening, the high flow rate of fluid when reducing valve opening, reduces the impact to valve pipe system element.When double plate butterfly swing check valves open settling position, will shunting decompression, eliminate the cavitation that local depression is formed at valve.Work as medium back flow, when closing the double plate butterfly swing check valve with shunting fan lobe, due to the shunting fan lobe with equal number of design, one relatively slow process when it is closed also on two pieces of semicircle valve plates, prevent closedown too fast, the water hammer produced when check-valves valve return.Therefore, with double plate butterfly swing check valves of shunting fan lobe, further increase the service life of pair plate butterfly swing check valve, improve the performance of its entirety, it is ensured that double plate butterfly swing check valves long lasting for use.
Above-mentioned detailed description of the invention is used for illustrating the present invention rather than limiting the invention, in the protection domain of spirit and claims of the present invention, and any modifications and changes that the present invention is made, both fall within protection scope of the present invention.
Claims (3)
1. with double plate butterfly swing check valves for shunting fan lobe, including double plate butterfly swing check valves, it is characterised in that: on the same side of two pieces of semicircle valve plates (2) of double plate butterfly swing check valves, it is equipped with seven pieces of symmetrical, structure is identical shuntings fan lobe (8)；In seven pieces of shuntings fan lobe (8) that described structure is identical, its any block shunting fan lobe (8), formed for the bus that semi arch top is straight line rotates 180 ° around centrage bottom it, its bus is 10 ° with the angle a of centrage；Angle between shunting fan lobe (8) centrage of adjacent two pieces is 20 °.
A kind of double plate butterfly swing check valves with shunting fan lobe the most according to claim 1, it is characterized in that: described every piece of shunting fan lobe (8) shunting fan lobe (8) summit near double plate butterfly swing check valve spring (4) sides to bottom lengths is semicircle valve plate (2) edge to 0.5～0.7 times of distance H at semicircle valve plate (2) center, it is round with semicircle valve plate (2) edge chamfer tangent that lobe (8) semi arch is fanned in every piece of shunting.
A kind of double plate butterfly swing check valves with shunting fan lobe the most according to claim 1, it is characterized in that: the radius of described every piece of shunting fan lobe (8) bus semi arch is semicircle valve plate (2) edge to 0.06 times of distance H at semicircle valve plate (2) center, the distance on semi arch top to semicircle valve plate (2) edge is semicircle valve plate (2) edge to 0.01 times of distance H at semicircle valve plate (2) center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410556391.5A CN104373639B (en) | 2014-10-20 | 2014-10-20 | Double plate butterfly swing check valves with shunting fan lobe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410556391.5A CN104373639B (en) | 2014-10-20 | 2014-10-20 | Double plate butterfly swing check valves with shunting fan lobe |
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| Publication Number | Publication Date |
|---|---|
| CN104373639A CN104373639A (en) | 2015-02-25 |
| CN104373639B true CN104373639B (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410556391.5A Active CN104373639B (en) | 2014-10-20 | 2014-10-20 | Double plate butterfly swing check valves with shunting fan lobe |
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| CN (1) | CN104373639B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112923106B (en) * | 2020-11-16 | 2022-07-12 | 天津澳特斯阀门制造有限公司 | Novel butterfly type double-plate check valve |
| CN115143307A (en) * | 2022-09-05 | 2022-10-04 | 陕西中桥明智能科技有限公司 | Check valve for rotary vane vacuum pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2071735U (en) * | 1990-06-09 | 1991-02-20 | 吕金超 | Butterfly non-return valve |
| JP4245189B2 (en) * | 2007-02-21 | 2009-03-25 | 株式会社巴技術研究所 | Check valve |
| CN202580149U (en) * | 2012-04-23 | 2012-12-05 | 永嘉县连邦阀门有限公司 | Valve clack |
| CN202580148U (en) * | 2012-04-23 | 2012-12-05 | 永嘉县连邦阀门有限公司 | Check valve |
| CN102840344B (en) * | 2012-08-07 | 2013-12-25 | 浙江理工大学 | Valve plate of butterfly valve based on reduction of cavitation damage |
| CN204213412U (en) * | 2014-10-20 | 2015-03-18 | 浙江理工大学 | A kind of two plate butterfly check valves with shunting fan lobe |
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- 2014-10-20 CN CN201410556391.5A patent/CN104373639B/en active Active
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| CN104373639A (en) | 2015-02-25 |
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