CN2386270Y

CN2386270Y - Anticorrosive butterfly valve

Info

Publication number: CN2386270Y
Application number: CN 99229091
Authority: CN
Inventors: 张宗华
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-04
Filing date: 1999-08-04
Publication date: 2000-07-05
Anticipated expiration: 2009-08-04

Abstract

The utility model provides a discharging or blocking butterfly valve which is suitable for the conveyance of various liquids. The butterfly valve is formed by the hot-pressing sealing of full plastic or rubber, and is composed of a valve body, a valve seat, a valve plate, a valve rod, etc. The butterfly valve is characterized in that butterfly valve is opened or closed by using the valve rod as the center. Because no metal part in the butterfly valve contacts media, the butterfly valve can not be corroded by media conveyed by the butterfly valve. Because the valve seat and the valve plate are sealed with each other by a bevel, the butterfly valve has favorable sealing performance and long service life. The butterfly valve can replace a stainless valve, and can approximately save 70 percent of investment. The butterfly valve can be used in poisonous media systems, or corrosive systems, or sewage treatment systems.

Description

A kind of anticorrosion butterfly valve

Novel a kind of valve that is applicable to that pipeline transport is used, especially a kind of discharging of pipeline transport medium or the butterfly valve of blocking-up of relating to of this real sheet.

In prior art, the valve plate of common butterfly valve and valve seat are the parts of direct contact medium, wherein valve plate mostly is gray iron casting, it only is applicable to no aggressive medium, if be used for Korrosionsmediums such as acid, alkali, is easy to corrosion, its working life is low, at present in the environment that is used in aggressive medium, domestic manufacturer all adopts stainless steel valve plate or lining tetrafluoro valve plate, and the valve plate that this material the is made inconvenient large-scale popularization that costs an arm and a leg is used; Butterfly valve plate that the common metal material is made and valve seat part for line contacts, use wearing and tearing easily between the sealing strip of its valve plate and valve seat for a long time, and sealing effect is bad, and working life is short.The valve plate of common butterfly valve is connected with valve seat to adopt to sell and connects, and the pin two ends directly contact with the medium that corrosion is arranged like this, are corroded easily, also limit its working life.

The purpose of this utility model is that to design a kind of energy for the deficiency that overcomes above-mentioned prior art etch-proof, and the butterfly valve that covers of the full rubber of good seal performance, and it can substitute stainless valve, and economical and practical, has improved working life again.

Task of the present utility model is implemented as follows: a kind of anticorrosion butterfly valve, it comprises valve body, in its center hole valve seat is housed, in the cylindrical hole up and down of valve body valve rod is housed, the valve plate center hole cooperates with valve rod and is contained in the valve seat, valve rod top and bottom are equipped with steel bushing respectively and are reached steel bushing down, and 0 RunddichtringO respectively is equipped with at the junction plane place of place, last steel bushing upper and lower end face and valve seat and valve body; Plug is equipped with in the following cylindrical body center hole lower end of valve body, and with screw plug and valve body is fixed, and the rubber asbestos packing of sealing usefulness is arranged in its junction plane; Described valve rod is the root stock, and its top is cylindrical body, and the upper end sidewall has keyway, and its underpart body of rod is a square body; Valve seat is a hollow short cylinder, and the radial direction through hole of its center line of mistake is respectively arranged on its two symmetrical sidewall; The central lines of two through hole and from axially going up the hollow short circle of five equilibrium, valve plate is the circular butterfly plate of piece, on it the center radial protrusion that traverses the butterfly plate face is arranged, its convex center is logical circular hole, there is positioning block at the through hole two ends, and positioning block is a circular plate, and its center is a square hole, the both sides symmetry has semicircle orifice, the valve plate inner frame is cast steel or ironcasting, and its outer surface is hot pressing rubber sealing moulding, is the boundary with logical circular hole on the valve plate, the outer edge surface of two semicircle is the inclined-plane, and inclined-plane, both sides true dip direction is opposite.

The utility model has following advantage compared with the prior art: because the processing of this butterfly valve is to adopt rubber or plastic or other material hot pressing sealing moulding, the metalwork that makes major part such as valve plate is direct contact medium, so obtained good effect on the anticorrosion problem of solution.Its sealing means also changes the face contact into by the contact of original line, and promptly the outer edge surface of valve plate is the inclined-plane, it with the sealing strip of valve seat between for face contacts, wearing and tearing can be compensated, thereby favorable sealing property, and have prolonged working life.From anticorrosion angle, it can substitute stainless valve, thereby can save investment about 70%, and it can be widely used in poisonous medium, sewage disposal system or have in the medium transport system of corrosion.Valve plate changes interior square axis into the connecting mode of valve seat and connects, and connects without pin, has solved the problem that pin is easily fractureed and pin two ends exposed parts easily is corroded.It is simple in structure, makes easily, and is with low cost, so it has good economic benefit and social benefit.

Accompanying drawing is had a talk about bright:

Fig. 1 is a sectional view of the present utility model.

Fig. 2 is the side view of sectional view of the present utility model.

Fig. 3 is the sectional drawing of the utility model valve plate.

Fig. 4 is the side view of the utility model valve plate.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail, as shown in Figures 1 and 2, it is by valve body 1, valve rod 2, O RunddichtringO 3, last steel bushing 4, O RunddichtringO 5, valve seat 6, O RunddichtringO 7, valve plate 8, following steel bushing 9, rubber asbestos packing 10, plug 11, screw 12 and packing ring 13 are formed, wherein valve body 1 is that a centre is hollow short cylinder, respectively extend less and the perpendicular cylindrical body of hollow short cylinder on its top and bottom sidewall, there is the manhole that communicates with short cylinder at this two cylindrical bodys center, the cylindrical body center hole is on same center line up and down, order is the hollow short cylinder of five equilibrium in the axial direction, there is a bigger disc face last cylindrical body upper-end surface, be evenly equipped with a plurality of small sircle holes around its center hole, cylindrical body root both sides are connected with gusset up and down, and positioning hole is all arranged on it.Valve rod 2 is stocks, and its top is cylindrical, and the bottom is square, and there is keyway its cylindrical upper section side.Last steel bushing 4 is annulus covers, makes with the 45# steel, and is identical with following steel bushing 9 structures.Valve seat 6 is hollow short cylinders, a radial direction through hole of crossing center line is respectively arranged on its two symmetrical sidewall, the central lines of two through hole, and axially go up the hollow short cylinder of five equilibrium from it, the periphery of valve seat matches with valve body 1, and its inner headed face has the sealing strip of a circle annular protrusion, it matches with the inclined-plane of the cylindrical of valve plate 8, valve seat 6 is to make skeleton with resin, covers the Ethylene Propylene Terpolymer glue material outward, so it has acid-proof alkaline.Valve plate 8 is butterfly plectanes, on it the center radial protrusion that traverses the butterfly face is arranged, convex center has manhole, butterfly plate is thick gradually thin to the circle peripheral edge by central authorities, its periphery is the inclined-plane, is the boundary with the circular hole, and the true dip direction on the inclined-plane of both sides is opposite, its outer surface is with rubber or ethylene-propylene diene copolymer or fourth is fine or fluorine glue hot pressing sealing, so but its acid resistant alkali or wet goods medium; A positioning block 14 is respectively installed at the center hole two ends of valve plate 8, positioning block 14 is circular blocks, there is cubic hole at its center, it cooperates with valve rod, and there is semicircle orifice on its both sides, and it is by locating stud and valve plate skeletal fixation, be to be that the center rotation drives the valve plate rotation with the valve rod when closing butterfly valve, like this between the sealing strip of valve plate and valve seat for the inclined-plane contacts, there is not the improper problem of interference in it, so its sealing effect is good.O RunddichtringO 3,5 and 7 is the ethylene-propylene diene copolymer seal ring.Plug 11 is the circular plugs of a steel, it matches with the following cylinder endoporus of valve body, and its lower end surface is than the great circle dish face, and its periphery has a plurality of manholes, fixedly connected with the valve body lower end face by screw 12 and packing ring 13, both are equipped with rubber asbestos packing 10 between the junction plane.In valve body 1 center hole valve seat 6 is housed, it up and down is equipped with valve rod 2 in the cylindrical hole, and valve plate 8 cooperates with valve rod and is loaded in the valve seat 6, steel bushing 4 is housed in the valve rod 2 reaches time steel bushing 9, the place, upper and lower end face of last steel bushing 4, and on the junction planes O RunddichtringO 3,5 and 7 is housed respectively in valve body 1 and the valve seat 6.Valve rod 2 top keyways can connect with unit head by key.

Claims

1. anticorrosion butterfly valve, it comprises valve body (1), valve seat (6) is housed in its center hole, valve rod (2) is housed in the cylindrical hole up and down of valve body, valve plate (8) center hole cooperates with valve rod (2) and is contained in the valve seat (6), valve rod (2) top and bottom are equipped with steel bushing (4) respectively and are reached steel bushing (9) down, and place, last steel bushing (4) upper and lower end face and valve seat (6) respectively are equipped with O RunddichtringO (3), (5) and (7) with the junction plane place of valve body (1); Plug (11) is equipped with in the following cylindrical body center hole lower end of valve body (1), and with screw that plug (11) and valve body (1) is fixing, and the rubber asbestos packing (10) of sealing usefulness is arranged in its junction plane; It is characterized in that: described valve rod (2) is the root stock, and its top is cylindrical, and the upper end sidewall has keyway, and its underpart body of rod is a square body; Valve seat (6) is a hollow short cylinder, and a radial direction through hole of crossing center line is respectively arranged on its two symmetrical sidewall, the central lines of two through hole and from axially going up the hollow short circle of five equilibrium; Valve plate (8) is the circular butterfly plate of piece, on it the center radial protrusion that traverses the butterfly plate face is arranged, its convex center is logical circular hole, there is positioning block (14) at the through hole two ends, positioning block (14) is a circular plate, its center is cubic hole, and the both sides symmetry has semicircle orifice, and valve plate (8) inner frame is cast steel or ironcasting, its outer surface hot pressing rubber sealing moulding, it is the boundary that valve plate (8) is gone up with logical circular hole, and the outer edge surface of two semicircle is the inclined-plane, and inclined-plane, both sides true dip direction is opposite.

2. a kind of anticorrosion butterfly valve according to claim 1 is characterized in that: the hot pressing closed material of the outer surface of described valve plate (8) can also with ethylene-propylene diene copolymer or fourth be fine or fluorine glue.