CN1696557A - Triple eccentric butterfly valve and valve body - Google Patents

Triple eccentric butterfly valve and valve body Download PDF

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Publication number
CN1696557A
CN1696557A CNA2005100521391A CN200510052139A CN1696557A CN 1696557 A CN1696557 A CN 1696557A CN A2005100521391 A CNA2005100521391 A CN A2005100521391A CN 200510052139 A CN200510052139 A CN 200510052139A CN 1696557 A CN1696557 A CN 1696557A
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CN
China
Prior art keywords
valve
valve body
shaft
groove
eccentric butterfly
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Pending
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CNA2005100521391A
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Chinese (zh)
Inventor
万木义则
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Tomoe Technical Research Co Ltd
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Tomoe Technical Research Co Ltd
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Publication of CN1696557A publication Critical patent/CN1696557A/en
Pending legal-status Critical Current

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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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/222—Shaping of the valve member
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0218—Butterfly valves

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Details Of Valves (AREA)

Abstract

The present invention provided a triple eccentric butterfly, improving the valve element of this triple eccentric butterfly valve, in the valve element surface on the opposite side to the side where a valve shaft is provided, which conventionally has been formed flat, grooves that are almost perpendicular to the valve shaft extending direction are provided. The grooves are formed symmetric on both sides of the diameter of the valve element extended perpendicularly to the valve shaft as the center axis. Therefor solving such problems in conventional triple eccentric butterfly valves that it is difficult to control flow of fluid when a valve element is slightly opened, and that because fluid passing the valve element comes out in jet flow, a pressure reduced part is generated on the back of the valve element to cause pressure imbalance that leads to inconvenience such as vibration of the valve element.

Description

Triple eccentric butterfly valve and valve body thereof
Technical field
The present invention relates to triple eccentric butterfly valve and valve body thereof.
Background technique
Fly valve is made of valve body and valve body.Valve body has pipe shape fluid passage, and valve body is that the center can be rotated in about 90 degree scopes with the valve shaft in the fluid passage of valve body.Valve body is the complete closed fluid passage when an end of rotating scope, opens fluid passage when the other end of rotatable scope fully.Valve body must closely contact with the internal surface around the fluid passage of valve body excircle during full cut-off.For reaching this purpose, be provided with on the internal surface of fluid passage seal ring is installed, the internal surface of seal ring makes can the tight valve seat surface that contacts with the outer peripheral surface of valve body.Because of fluid passage is the pipe shape, so that valve body makes usually is discoideus.
In the fly valve,, therefore, pass the valve body center mostly and valve shaft is set because of valve body is that rotate at the center with the valve shaft.Yet triple eccentric butterfly valve generally makes the structure shown in Fig. 1 midship section, valve shaft 2 relative valve bodies 1 through once, secondary and three off-centre and by triple eccentric be installed on the valve body.
Among Fig. 1, triple eccentric butterfly valve is made of valve body 1 and valve body 3.The above-mentioned so-called once eccentric valve shaft 2 that is meant is partial to wherein half side of plectane the off-centre that forms is installed from the plane deviation distance P that connects valve body 1 outer peripheral surface.So-called secondary off-centre is meant that center line 4 that valve shaft 2 departs from valve body 1 is partial to a side of valve body the off-centre that forms is installed apart from Q.
Three off-centre is the off-centre that the shape owing to valve seat surface 5 produces.The so-called valve seat surface 5 here be meant must be with the outer peripheral surface of valve body 1 internal surface of tight fluid in contact path.That is, so-called three off-centre are meant that valve seat surface 5 is located at the off-centre on the conical surface 7 that has summit 6 on the elongation line of fluid passage wall, and the center line of valve body 1 is departed from and the off-centre that causes in the summit 6 of conical surface 7.Because of the outer peripheral surface of valve body 1 must closely contact with valve seat surface 5, so the outer peripheral surface of valve body 1 also makes the circular cone table top of inclination.The summit 6 relative valve bodies 1 of circular cone are positioned at the opposition side that valve shaft 2 one sides are installed.
Such non-once but fly valve that three off-centre forms is opened record to some extent in the flat 11-351417 communique for example spy.
Patent documentation 1: the spy opens flat 11-351417 communique
Triple eccentric butterfly valve, the whole outer peripheral surface with valve body 1 can be extracted out simultaneously from valve seat surface 5, and the advantage that can extract out with very little power.For this reason, triple eccentric butterfly valve is used to control particularly high-temperature, high pressure fluid of high-pressure liquid.
To have the advantage that the whole outer peripheral surface of valve body can extract out simultaneously opposite with triple eccentric butterfly valve, and this also is the reason that causes its shortcoming.That is, when valve began to open, for the whole circumference face that the makes valve body face of lifting off a seat simultaneously, so valve body is opened when making fluid begin to flow from full-shut position, there was the very problem of difficulty of fluid FLOW CONTROL in a large amount of fluid that once flows.And, high-pressure liquid goes out to the whole circumference surface current from the close gap between valve body excircle and the valve seat surface when beginning to open because of valve, so fluid is the jet ejection, so generate the decompression part at the valve body back side, it is unbalanced to cause the fly valve internal pressure to produce, and consequently defective generations such as high vibration appear in valve body.
Te Kaiping 9-170665 communique is in order to improve above-mentioned defective, attempt not allow the valve body face of lifting off a seat simultaneously, and make that half side valve body outer peripheral surface that valve shaft is not installed face of lifting off a seat earlier, then make the valve body outer peripheral surface of the face of lifting off a seat extend in turn that another is half side, for this reason, proposed valve body thickness one end strengthened and scheme that the other end reduces.But according to this scheme, fluid flow reduced when the valve body aperture was low, and Flow-rate adjustment still is not easy certainly, and, in case fluid will produce jet by valve body, there is the problem of damage valve body.
Patent documentation 2: the spy opens flat 9-170665 communique
Summary of the invention
The objective of the invention is to solve in the past existing the problems referred to above of triple eccentric butterfly valve and defective.That is, the purpose of this invention is to provide a kind of triple eccentric butterfly valve that has the following advantages, can easily regulate flow under the very little state of valve body aperture, can correct by the pressure in the mobile valve that causes of fluid unbalancedly, thereby valve body vibration is minimized.
The valve body of triple eccentric butterfly valve constitutes the plane in fact on the surface that an opposite side of valve shaft is installed so far.Corresponding therewith, the core of this invention is, be provided with on this surface along the groove that extends with the approximately vertical direction of valve shaft bearing of trend, thereby by fluid is addressed the above problem a little and defective along concentrated flow is moving.
This invention provides a kind of valve body of triple eccentric butterfly valve on the one hand, and a kind of triple eccentric butterfly valve that adopts above-mentioned valve body is provided on the other hand.
The valve body that the triple eccentric butterfly valve that this invention will provide is used, it is the discoideus valve body that the surface constitutes the plane in fact, valve shaft is partial to wherein half side of plectane and is installed in and relies on the plectane back side one side, the outer peripheral surface of valve body is positioned at relative valve body to have on the inclination conical surface on summit with the valve shaft opposition side, it is characterized in that: in the valve body that above-mentioned triple eccentric butterfly valve is in the past used, the above-mentioned surface of valve body is provided with along the groove that extends with the direction of valve shaft bearing of trend approximate vertical, with the valve diameter perpendicular to the valve shaft extension is central shaft, and above-mentioned groove is configured in the both sides of this central shaft with the shape of symmetry.
And the triple eccentric butterfly valve that this invention will provide is the triple eccentric butterfly valve that above-mentioned valve body of the present invention has been installed.Promptly, triple eccentric butterfly valve of the present invention, by the valve body with pipe shape fluid passage and with the valve shaft is that the valve body that the center is installed in rotation in this fluid passage constitutes, valve body is made of the plectane that the surface constitutes the plane in fact, valve shaft is partial to wherein half side of plectane and is installed in and relies on the plectane back side one side, the outer peripheral surface of valve body is positioned at relative valve body to have on the inclination conical surface on summit with the valve shaft opposition side, the valve seat surface of valve body also is positioned on the conical surface of same inclination, it is characterized in that: the valve body that in the triple eccentric butterfly valve of above-mentioned formation, has used following formation, promptly the above-mentioned surface of valve body is provided with along the groove that extends with the direction of valve shaft bearing of trend approximate vertical, with the valve diameter perpendicular to the valve shaft extension is central shaft, and above-mentioned groove is configured in the both sides of this central shaft with the shape of symmetry.
Do not setover from valve body center convergence the half side edge of valve body of valve shaft is installed along with above-mentioned groove, groove depth increases gradually.
And, not setover the half side edge of valve body of valve shaft is installed along with above-mentioned groove convergence, above-mentioned groove tilts slightly, draws close to the valve diameter direction perpendicular to valve shaft gradually.
Adopt the present invention, because of valve body is provided with the groove that extends along the direction vertical with the valve shaft bearing of trend from the teeth outwards, valve body is opened and fluid when beginning to flow from full-shut position, and fluid is at first only from the concentrated flow mistake, and the adjusting of the Fluid Volume when beginning to flow is easy.
And, to be central shaft with the valve diameter that extends perpendicular to valve shaft be configured in the both sides of this central shaft by shape to this groove symmetrically, therefore, and the fluid that goes out by concentrated flow, flow with respect to the plane symmetry of bisection, so fluid is mobile by equalization perpendicular to the fluid passage of valve shaft.
And groove depth did not increase gradually when this groove was setovered the half side edge of valve body that valve shaft is installed from valve body center convergence, so the fluid by valve body is to the central axis direction diffluence of fluid passage.Therefore, what fluid flowed in the time of can reducing valve body and begin to open is unbalanced, so can reduce the negative pressure that the valve body back side takes place, can reduce the vibration of valve body simultaneously.
Further, the groove convergence does not tilt when setovering the half side edge of valve body that valve shaft is installed slightly, draws close to the valve diameter direction perpendicular to valve shaft gradually, so the fluid by valve body is to the central axis direction diffluence of fluid passage.By adopting these measures, can reduce unbalanced that fluid flows, reduce the negative pressure that the valve body back side takes place simultaneously.Like this, not only reduce the vibration of valve body, and suppressed the generation of noise, and then can prevent the valve body damage.
Description of drawings
Fig. 1 is the explanatory drawing of the structure of triple eccentric butterfly valve in the past.
Fig. 2 represents the valve body that triple eccentric butterfly valve of the present invention is used, and (a) is the front view of valve body, (b) is the side view of valve body.
Fig. 3 represents the valve body that another triple eccentric butterfly valve of the present invention is used, and (a) is the front view of valve body, (b) is the side view of valve body.
Fig. 4 represents the valve body that another triple eccentric butterfly valve of the present invention is used, and (a) is the front view of valve body, (b) is the side view of valve body.
Fig. 5 is the sectional drawing of triple eccentric butterfly valve of the present invention.
Fig. 6 is the plotted curve of the rating curve of expression triple eccentric butterfly valve of the present invention.
Among the figure: 1-valve body, 2-valve shaft, 3-valve body, the center line of 4-valve body, the 5-valve seat surface, 6-conical tip, 7-conical surface, 8-fluid passage, the 11-valve body surface, the 12-valve body back side, 13-valve body center, 14-is perpendicular to the valve diameter of valve shaft, one end of 15- diameter 14,16, the 17-groove, the other end of 18-diameter 14, the end of 19-groove, 21,22, the prominent muscle of 23-, the center line of 30-groove, 31,32-is hollow, X, Y, Z-valve body of the present invention, S-conical surface.
Embodiment
With reference to the accompanying drawings an embodiment of valve body of the present invention is described below.Fig. 2 represents the valve body of triple eccentric butterfly valve of the present invention, and Fig. 3 represents the valve body of another triple eccentric butterfly valve of the present invention, and Fig. 4 represents the valve body of another triple eccentric butterfly valve of the present invention.Wherein, (a) being the front view of valve body, (b) is the side view of valve body.Fig. 5 is the sectional drawing that the triple eccentric butterfly valve of valve body of the present invention is installed.
Valve body X of the present invention shown in Figure 2, former is the discoideus valve body that surperficial 11 essence have made the plane.Valve shaft 2 is installed on the valve body X, and valve shaft 2 is biased the back side 12 sides that are fixed on valve body X, becomes once eccentric.And the center 13 that valve shaft 2 departs from valve body X is fixed on wherein half side of plectane, becomes secondary off-centre.
And the outer peripheral surface of valve body X is positioned on the conical surface S, has on the inclination conical surface on summit with valve shaft 2 opposition sides and this conical surface S is positioned at relative valve body X.In detail, the summit of conical surface S is positioned on the diameter 14 but also the plane perpendicular to valve shaft 2 that not only comprises perpendicular to valve shaft 2, and is positioned at the position that equals the valve body radius R apart from the distance of the central shaft of valve body.And the summit of conical surface is positioned in Fig. 2 (a) on the end 15 and the straight line perpendicular to paper by diameter 14.Like this, valve body X has had off-centre three times.
So only by once, the valve body of the triple eccentric butterfly valve that constitutes of secondary and three off-centre is known.But valve body X two grooves 16 of configuration on surface 11 are then different with known triple eccentric butterfly valve valve body with 17 this point.Groove 16 all extends along the direction vertical with the bearing of trend of valve shaft 2 with 17.And groove 16 and 17 is a central shaft with the valve diameter 14 perpendicular to valve shaft 2 extensions, is configured in the both sides of this central shaft symmetrically by shape.
Groove 16 and 17 also is the other end 18 with diameter 14 among convergence Fig. 2 when being the edge at center when valve body center 13 convergences are not setovered the half side edge of valve body that valve shaft is installed, and groove depth all increases gradually.The other end 18 is the edge sections from the summit of conical surface S valve body farthest.And the other end 18 is the edge sections of breadth biggest place on every side that can see when being conceived to positive apparent surface 11 on 11 the center line of surface.Therefore, the edge of wide side is big more near the degree of depth to width more for groove 16 and 17.Here it is valve body X of the present invention.
Groove 16 and 17 tilts, slightly to draw close with diameter 14 gradually when the edge that with the other end 18 is the center is close.That is, the center line 30 of groove 16 is if represent that with double dot dash line double dot dash line can be parallel with diameter 14, but preferably inclination slightly.This tilt angle theta is preferably in 4～6 degree.
Valve body Y of the present invention shown in Figure 3, identical with valve body X shown in Figure 2, be through once, the valve body used of the triple eccentric butterfly valve of secondary and three off-centre.It is similar with 17 valve body X that valve body Y and surperficial 11 is provided with groove 16, but difference is also arranged.
Groove 16 on the valve body Y and 17 all edge and about vertical direction extensions of valve shaft bearing of trend.And groove 16 and 17 is a central shaft with about diameter 14 that extends perpendicular to valve shaft 2, is configured in the both sides of this central shaft symmetrically by shape.Further, groove 16 and 17 is got over to the edge of the other end 18 sides of the diameter of valve body close, and groove depth increases gradually.At these points, valve body Y is identical with valve body X.
What valve body Y was different with valve body X is, the groove 16 and 17 among the valve body Y seem just as if by set 3 prominent muscle 21,22,23 that extend along diameter 14 form the same.The end face of prominent muscle 21 to 23 makes the plane and is 12 contour apart from the back side.If with the bottom surface of groove 16 and 17 is the end face that benchmark is seen prominent muscle 21 to 23, seem end face as if more to the other end 18 be the edge at center near highly increasing, this be since the bottom surface of groove 16 and 17 to above-mentioned edge near the time degree of depth cause that increases gradually.That is, valve body Y is provided with groove 16 and 17 to form on original surface makes the discoideus valve body on plane.
Valve body Y goes up except groove 16 and 17, also is formed with hollow 31 and 32 separately in the outside of prominent muscle 21 and the outside of prominent muscle 23.Hollow 31 and 32 and the end of the end of groove 16 and groove 17 with dark.Hollow 31 and 32 be arranged on valve shaft 2 near, therefore, flowing of the fluid when particularly valve body began to open when valve body was opened and closed do not produce big influence.
Valve body Z of the present invention shown in Fig. 4 and Fig. 2 and valve body X shown in Figure 3 are identical with valve body Y, are the valve bodies that the fly valve of triple eccentric is used.Only be equipped with unique groove 16 this point on surface 11, valve body Z is different with valve body Y with valve body X.
The groove 16 of valve body Z extends perpendicular to valve shaft 2, is that the central shaft shape is arranged symmetrically with the diameter 14 perpendicular to valve shaft 2.And the degree of depth of groove 16 is dark more near the degree of depth to the edge that with the other end 18 is the center more.Valve body Z is identical with valve body X and valve body Y at these points.Though it is identical to wish that the end of groove 16 is preferably in the width direction height of groove, the section of the width direction of groove makes circular-arc, and the degree of depth is dark more also is fine in past more width central authorities.But, must make groove 16 blocked with tight contact of valve seat surface of valve body when the valve full cut-off, so the bosom at the end of groove 16 preferably is positioned at usually from about position below 1/3rd of the valve body thickness of valve body surface 11 beginnings.
Valve body of the present invention is installed in rotation on the valve body of fly valve, is used as triple eccentric butterfly valve.Fig. 5 represents the section of triple fly valves of so making.
Among Fig. 5, valve body of the present invention, for example valve body X is that the center is installed in rotation in the pipe shape fluid passage of being installed on the valve body 38 with valve shaft 2, constitutes triple eccentric butterfly valve.The surface 11 and the back side 12 of valve body X are positioned at position shown in the solid line, and valve body thickness is identical.The groove 16 and 17 the end, are positioned at position shown in the dotted line 19.
Make the triple eccentric butterfly valve of Fig. 5 press the rotation of direction shown in the arrow D, begin to open by full-shut position.Fluid flow direction is an occasion from left to right among Fig. 5, the upside of valve body X is called as drain port side, the valve body downside is called as the injection oral-lateral, the outer round surface of the drain port side of valve body X is the vertically extending circumferential surface of 11 beginnings from the surface, the outer round surface that sprays oral-lateral is the circular cone table top of the 11 beginning diagonally extendings from the surface, and the circular cone table top is widened gradually when the back side 12 is stretched on surface 11 and tilted.
Valve body X except the mounting portion of valve shaft 2, is made of the plectane that is of uniform thickness as shown in Figure 5, and its surperficial 11 sides dispose groove 16 and 17.Groove 16 and 17 does not show in the section of Fig. 5 that bottom land is positioned at the position shown in the dotted line 19, and the closer to spraying oral-lateral, the groove 16 and 17 the degree of depth are dark more.
Here, if valve body X rotates to direction shown in the arrow D, valve body X does not form the gap immediately when beginning to rotate between the valve seat surface 5 of drain port side and valve body 3, and produces the gap between injection oral-lateral and valve seat surface 5.At this moment, because surface 11 sides of valve body X are provided with groove 16 and 17, and groove depth increases opening-likely gradually, and the fluid that is positioned at surface 11 1 sides mainly only flows by groove 16 and 17.The Fluid Volume that flow this period is little.But valve body X compares with the valve body in the past that groove is not set, the time ratio that fluid begins to flow valve body in the past early, and the amount of effluent fluid is many.So valve body X is when full-shut position begins to open in the triple eccentric butterfly valve of Fig. 5, it is easy that the flow control at initial stage becomes.
And owing to be central shaft with the diameter that extends perpendicular to valve shaft in valve body X, shape is provided with groove 16 and 17 symmetrically in the central shaft both sides, so flow with respect to the plane symmetry that halves perpendicular to the fluid passage of valve shaft by groove 16 and 17 fluids that flow.That is, the unbalanced minimizing of flowing, fluid flow equalization.
Further, because groove 16 and 17 dark more,, promptly reduced the back pressure that produces in valve body X back side so compile mobilely to the central axis direction of fluid passage by groove 16 and 17 fluids that flow the closer to the jetburner side channel degree of depth.
Like this, groove 16 and 17 has not only reduced to flow through unbalanced that fluid behind the valve body X flows, and has reduced the back pressure that produces in valve body X back side, so the vibration of valve body reduces, noise reduces, and then has prevented the damage of valve.
In fact, the rating curve of triple eccentric butterfly valve of the present invention as shown in Figure 6.The transverse axis of Fig. 6 is got the angle (%) of expression valve body aperture, and the longitudinal axis is got flow (%), has represented the rating curve of fly valve.Curve A among the figure is the characteristic curve of fly valve of the present invention, and curve B is the characteristic curve that above-mentioned spy drives the fly valve of putting down in writing in the flat 9-170665 communique.Compare with curve B, curve A flow (%) till the opening angle of valve reaches 40 degree is all very big, and valve is just a lot of from the beginning turn-on flow rate, so can distinguish that the adjusting of flow is easy.But, do not have difference at the aperture angle 40 above flows of degree (%).That is, adopt the present invention, only easy than valve Flow-rate adjustment in the past when valve body begins to open.

Claims (4)

1. the valve body of a triple eccentric butterfly valve, it is the discoideus valve body that the surface constitutes the plane in fact, valve shaft is partial to wherein half side of plectane and is installed in and relies on the plectane back side one side, the outer peripheral surface of valve body is positioned at relative valve body to have on the inclination conical surface on summit with the valve shaft opposition side, it is characterized in that: the above-mentioned surface of valve body is provided with along the groove that extends with the direction of valve shaft bearing of trend approximate vertical, with the valve diameter perpendicular to the valve shaft extension is central shaft, and above-mentioned groove is configured in the both sides of this central shaft with the shape of symmetry.
2. the valve body of triple eccentric butterfly valve according to claim 1 is characterized in that: do not setover from valve body center convergence the half side edge of valve body of valve shaft is installed along with groove, groove depth increases gradually.
3. the valve body of triple eccentric butterfly valve according to claim 1 and 2 is characterized in that: do not setover the half side edge of valve body of valve shaft is installed along with the groove convergence, groove tilts slightly, draws close to the valve diameter direction perpendicular to valve shaft gradually.
4. triple eccentric butterfly valve, by the valve body with pipe shape fluid passage and with the valve shaft is that the valve body that the center is installed in rotation in this fluid passage constitutes, valve body is made of the plectane that the surface constitutes the plane in fact, valve shaft is partial to wherein half side of plectane and is installed in and relies on the plectane back side one side, the outer peripheral surface of valve body is positioned at relative valve body to have on the inclination conical surface on summit with the valve shaft opposition side, the valve seat surface of valve body also is positioned on the conical surface of same inclination, it is characterized in that: the valve body that has used following formation, promptly the above-mentioned surface of valve body is provided with along the groove that extends with the direction of valve shaft bearing of trend approximate vertical, with the valve diameter perpendicular to the valve shaft extension is central shaft, and above-mentioned groove is configured in the both sides of this central shaft with the shape of symmetry.
CNA2005100521391A 2004-05-10 2005-02-25 Triple eccentric butterfly valve and valve body Pending CN1696557A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004139749A JP3709196B1 (en) 2004-05-10 2004-05-10 Triple eccentric butterfly valve and valve body
JP2004139749 2004-05-10

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Publication Number Publication Date
CN1696557A true CN1696557A (en) 2005-11-16

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CNA2005100521391A Pending CN1696557A (en) 2004-05-10 2005-02-25 Triple eccentric butterfly valve and valve body

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KR (1) KR20050107734A (en)
CN (1) CN1696557A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008061472A1 (en) * 2006-11-22 2008-05-29 Yaode Yang A new type butterfly valve core and its butterfly valve
CN111556940A (en) * 2018-01-10 2020-08-18 旭有机材株式会社 Butterfly valve
CN113251152A (en) * 2021-04-29 2021-08-13 合肥工业大学 Improved cavitation-resistant valve capable of reducing separation vortex

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6523734B2 (en) * 2015-03-27 2019-06-05 株式会社栗本鐵工所 Butterfly valve
RU183622U1 (en) * 2017-10-05 2018-09-28 Акционерное общество "Машиностроительный завод "Армалит" DISC SHUTTER WITH TRIPLE ECCENTRICITY
CN113503368B (en) * 2021-08-23 2022-09-16 蒋雪莲 Abrasion-free soft sealing butterfly valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008061472A1 (en) * 2006-11-22 2008-05-29 Yaode Yang A new type butterfly valve core and its butterfly valve
CN111556940A (en) * 2018-01-10 2020-08-18 旭有机材株式会社 Butterfly valve
CN111556940B (en) * 2018-01-10 2022-06-03 旭有机材株式会社 Butterfly valve
CN113251152A (en) * 2021-04-29 2021-08-13 合肥工业大学 Improved cavitation-resistant valve capable of reducing separation vortex
CN113251152B (en) * 2021-04-29 2024-01-12 合肥工业大学 Improved generation reduces separation vortex anti-cavitation valve

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