CN106678376A - Butterfly valve body with butterfly valve sealing surface being continuously changed cone curved surface - Google Patents

Abstract

The invention relates to a butterfly valve body with a butterfly valve sealing surface being a continuously changed cone curved surface. The butterfly valve body comprises the valve body. The valve body is provided with a circular valve seat and a shaft seat hole. The circular valve seat is arranged on one side of the lower portion of the shaft seat hole in the peripheral direction. A continuously changed cone high-order internal-concave curved surface is made on the sealing surface of the circular valve seat. The continuously changed cone high-order internal-concave curved surface can be consistent with the externally-convex sealing surface of a sealing ring of a butterfly plate machined according to a simple revolved body after force deformation in a geometrical shape, and can closely seal the sealing surface of the sealing ring of the butterfly plate. According to the valve body, the continuously changed cone high-order internal-concave curved surface is made on the sealing surface of the valve body, a sealing gap caused by the nonuniform deformation of the sealing surface of the butterfly plate is compensated, and the sealing gap caused by the deformation of the sealing surface of the butterfly plate is reduced or removed, so that the shapes of all positions of a sealing pair are consistent or close to consistent, the purpose of reliable sealing is achieved, and the sealing performance is improved.

Description

It is provided with the butterfly valve body in the continuous butterfly valve seal face for becoming cone curved surface

Technical field

The invention belongs to valve arrangement technical field, especially a kind of butterfly valve body for being provided with the continuous butterfly valve seal face for becoming cone curved surface.

Background technology

Valve is the control unit in fluid delivery system, with cut-off, regulation, water conservancy diversion, prevent adverse current, voltage stabilizing, shunting or The functions such as overflow pressure relief.For the valve of fluid control systems, from simplest stop valve to extremely complex robot control system(RCS) in institute Various valves, its kind and specification it is quite various.Valve can be used to controlling empty gas and water, steam, various Korrosionsmediums, The flowing of all kinds fluid such as mud, oil product, liquid metal and radiating medium.Industrial valves door type is varied, extensively General to be applied to the industries such as chemical industry, food, water, electricity, the Flow-rate adjustment and cut-off for primarily serving fluid media (medium) is acted on.

Butterfly valve plate of the prior art is mostly iron and steel material quality, and most of butterfly plates are all single flat board, double flat plate or Dan Ping Plate adds the circular slab or similar round plate of arc plate composition, and the various space curved surfaces of sealing surface system positioned at its excircle position are parallel flat by two The following several types curved surface that face is abscissused or bevel is generated：1. the positive face of cylinder or oblique circular cylinder face；2. the positive round conical surface or oblique cone face；3. Positive sphere or oblique sphere；4. plane.Butterfly plate axle bed is provided with along plectane or the diametric center of class plectane or close centre, Butterfly plate is supported to bear through in butterfly plate axis bore by the axis in the corresponding axle bed hole of valve body or positioned at two sections of axles of same axis Pressure medium is poor before and after butterfly plate, and is unlikely to make butterfly plate produce over-large displacement and deformation.For big specification butterfly valve seal circle, Due to strong point skewness, vertically stress deformation is also uneven at its excircle position when causing butterfly plate pressure-bearing, and phase therewith The deflection of the valve body sealing surface of cooperation causes the goodness of fit between valve body and butterfly plate sealing pair with respect to being uniform for butterfly plate deformation Reduce, produce gap, sealing property destroyed, cause media leaks, valve performance to reduce or fail, make heavy caliber, Especially the design of metal-seated butterfly valve, manufacture and engineer applied are subject to severely restricts to high pressure sealed butterfly valve.

By retrieval, the patent publication us related to present patent application are not yet found.

The content of the invention

It is an object of the invention to overcome the weak point of original technology, there is provided a kind of design science rationally, simple structure, to butterfly The uneven seal clearance for causing of plate sealing facial disfigurement plays compensating action, the sealing that butterfly plate sealing facial disfigurement causes is reduced or eliminated Gap, make sealing pair shape everywhere consistent or be close to it is consistent, realize the purpose for reliably sealing be provided with the continuous butterfly for becoming cone curved surface The butterfly valve body of valve sealing surface.

The technical proposal for solving the technical problem of the invention is：

A kind of butterfly valve body for being provided with the continuous butterfly valve seal face for becoming cone curved surface, the butterfly valve body includes valve body, in the valve body Round ring seat and axle bed hole are provided with, the round ring seat is circumferentially arranged at the side below axle bed hole, the annulus Continuous change circular cone high order inner sunken face is formed with the sealing surface of shape valve seat, the continuous change circular cone high order inner sunken face can be with evagination The butterfly plate sealing ring sealing surfaces stress deformation processed by simple revolving body after geometry coincide it is consistent and can be by it Tight seal.

And, it is described it is continuous change circular cone high order inner sunken face into a frustum of a cone side surface, the frustum of a cone side surface including upper bottom surface, Bottom surface and frustum of a cone side, the upper bottom surface and bottom surface are on-plane surface, the frustum of a cone side respectively with upper bottom surface and under The intersection of bottom surface is respectively a continuous space high order curve, the continuous space high order curve composition high order curve race, the high order curve race Space geometry be characterized as：Same point on the continuous space high order curve place frustum of a cone toric axis is to each point on the curve Distance be unequal, and be that by known predetermined mathematical feature continually varying, the known predetermined mathematical is characterized as： Mathematic(al) representation of the frustum of a cone curved surface in Descartes's rectangular coordinate system be：x²+y²=z²；In formula：X, y and z are represented respectively Coordinate of any point on X, Y and Z axis on frustum of a cone curved surface.

Advantages of the present invention and good effect are：

1st, this valve body is made according to each side situations such as butterfly plate geomery, architectural characteristic, stress sizes on valve body sealing surface Continually varying circular cone high order inner sunken face is made, the circular cone high order inner sunken face matches with the butterfly plate sealing surface after stress deformation And reach sealing property requirement, can compensate be arranged in the sealing ring surface of butterfly plate circumferencial direction because butterfly plate strong point skewness weighing apparatus, The seal clearance error of the uneven generation of stress deformation, plays compensation and makees to the uneven seal clearance for causing of butterfly plate sealing facial disfigurement With, the seal clearance that butterfly plate sealing facial disfigurement causes is reduced or eliminated, make sealing pair shape everywhere consistent or be close to unanimously, it is real The purpose for now reliably sealing, improves sealing property, thus can reduce the rigidity requirement of big specification high pressure butterfly plate, reduce valve Door cost, especially the design of metal-seated butterfly valve, manufacture and engineer applied are subject to make heavy caliber, high pressure sealed butterfly valve To widely applying.

2nd, into a frustum of a cone side surface, the frustum of a cone side surface includes upper bottom to the continuous change circular cone high order inner sunken face of this butterfly valve body Face, bottom surface and frustum of a cone side, the upper bottom surface and bottom surface are on-plane surface, the frustum of a cone side respectively with upper bottom surface It is respectively a continuous space high order curve with the intersection of bottom surface, the continuous space high order curve composition high order curve race, the valve body exists Continually varying conical surface sealing surface is made at valve body and valve seat and continuously becomes circular cone high order inner sunken face, simple structure, it is easy to make, With low cost, this conical surface sealing surface is highly consistent identical with the butterfly plate sealing ring sealing surfaces geometry after stress deformation, The sealing ring surface for being arranged in butterfly plate circumferencial direction can be compensated because of butterfly plate strong point skewness weighing apparatus, the uneven generation of stress deformation Seal clearance error, it is ensured that sealing property, media leaks will not be caused, improve the performance of valve, extend valve The service life of door, reduces the production of enterprise at this.

Description of the drawings

Fig. 1 is the structure connection diagram of the present invention；

Fig. 2 is A portions structure connection enlarged diagram in Fig. 1.

Specific embodiment

For present disclosure, feature and effect can be further appreciated that, following examples are hereby enumerated, and coordinate accompanying drawing to describe in detail It is as follows.It should be noted that the present embodiment is descriptive, it is not determinate, it is impossible to thus limit the protection model of the present invention Enclose.

A kind of butterfly valve body for being provided with the continuous butterfly valve seal face for becoming cone curved surface, as shown in figure 1, the butterfly valve body includes valve body 2, round ring seat 3 and axle bed hole 1 are provided with the valve body, the round ring seat is circumferentially arranged at axle bed hole lower section Side, be formed with the sealing surface of the round ring seat and continuous become circular cone high order inner sunken face 4, the continuous change circular cone high order Geometry after the butterfly plate sealing ring sealing surfaces stress deformation that inner sunken face can be processed by simple revolving body with evagination It coincide consistent and can be by its tight seal.

This valve body according to each side situations such as butterfly plate geomery, architectural characteristic, stress sizes, the system of making on valve body sealing surface Go out continually varying circular cone high order inner sunken face, the circular cone high order inner sunken face match with the butterfly plate sealing surface after stress deformation and Reach sealing property requirement, can compensate be arranged in the sealing ring surface of butterfly plate circumferencial direction because butterfly plate strong point skewness weighing apparatus, The seal clearance error of the uneven generation of stress deformation, plays compensation and makees to the uneven seal clearance for causing of butterfly plate sealing facial disfigurement With, the seal clearance that butterfly plate sealing facial disfigurement causes is reduced or eliminated, make sealing pair shape everywhere consistent or be close to unanimously, it is real The purpose for now reliably sealing, improves sealing property, thus can reduce the rigidity requirement of big specification high pressure butterfly plate, reduce valve Door cost, especially the design of metal-seated butterfly valve, manufacture and engineer applied are subject to make heavy caliber, high pressure sealed butterfly valve To widely applying.

In the present embodiment, as shown in Fig. 2 the continuous change circular cone high order inner sunken face is into a frustum of a cone side surface, the circular cone Platform side surface includes upper bottom surface 7, bottom surface 5 and frustum of a cone side 9, and the upper bottom surface and bottom surface are on-plane surface, the circle Frustum side is respectively respectively a continuous space high order curve with the intersection of upper bottom surface and bottom surface, the continuous space high order curve composition High order curve race 6, the notable space geometry of the high order curve race is characterized as：The continuous space high order curve place frustum of a cone is bent The distance of the same point on face axis 8 to each point on the curve is unequal, and is continuously become by known predetermined mathematical feature Change, the known predetermined mathematical is characterized as：Mathematic(al) representation of the frustum of a cone curved surface in Descartes's rectangular coordinate system be： x²+y²=z²；In formula：X, y and z represent respectively coordinate of any point on X, Y and Z axis on frustum of a cone curved surface.

This butterfly valve body makes continually varying conical surface sealing surface at valve body and valve seat and continuously becomes circular cone high order inner sunken face, knot Structure is simple, easy to make, with low cost, the butterfly plate sealing ring sealing surfaces geometry after this conical surface sealing surface and stress deformation Shape height is unanimously coincide, can compensate be arranged in the sealing ring surface of butterfly plate circumferencial direction because butterfly plate strong point skewness weighing apparatus, The seal clearance error of the uneven generation of stress deformation, it is ensured that sealing property, will not cause media leaks, improve valve Performance, extends the service life of valve, reduces the production of enterprise at this.

Claims (2)

1. a kind of to be provided with the butterfly valve body that the butterfly valve seal face of curved surface is bored in continuous change, the butterfly valve body includes valve body, the valve body Inside it is provided with round ring seat and axle bed hole, it is characterised in that：The round ring seat is circumferentially arranged at below axle bed hole Side, is formed with continuous change circular cone high order inner sunken face, the continuous change circular cone high order indent on the sealing surface of the round ring seat Geometry after the butterfly plate sealing ring sealing surfaces stress deformation that curved surface can be processed by simple revolving body with evagination is coincide It is consistent and can be by its tight seal.

It is 2. according to claim 1 to be provided with the butterfly valve body that the butterfly valve seal face of curved surface is bored in continuous change, it is characterised in that：Institute The continuous circular cone high order inner sunken face that becomes is stated into a frustum of a cone side surface, the frustum of a cone side surface includes upper bottom surface, bottom surface and circular cone Platform side, the upper bottom surface and bottom surface are on-plane surface, and the frustum of a cone side is each with the intersection of upper bottom surface and bottom surface respectively For a continuous space high order curve, the continuous space high order curve composition high order curve race, the space geometry spy of the high order curve race Levy for：Same point on the continuous space high order curve place frustum of a cone toric axis to the distance of each point on the curve is not phase Deng, and be that, by known predetermined mathematical feature continually varying, the known predetermined mathematical is characterized as：Frustum of a cone curved surface exists Mathematic(al) representation in Descartes's rectangular coordinate system is：x²+y²=z²；In formula：X, y and z are represented respectively on frustum of a cone curved surface Coordinate of any point on X, Y and Z axis.