CN205260868U - Butterfly valve - Google Patents

Abstract

The utility model discloses a butterfly valve, including the valve body, this valve body has an inner chamber, and this inner chamber has a second mouth of a river that lies in the left first mouth of a river and lie in the right side, and should interior intracavity be equipped with the disk seat and the rotatable dish board of cast, is fixed with the valve rod on this dish board, and this valve rod upwards extends to the outside of this valve body, the opening at the first mouth of a river is equipped with the step, this disk seat is fixed in this step through at least 3 soket head cap screw on, and still is fixed with outer graphite packing ring through these a little soket head cap screw between this disk seat and this step, and simultaneously, the avris of this dish board is fixed with interior graphite packing ring, should outer graphite packing ring with should match by interior graphite packing ring. The of the present invention advantage is: parts are not fragile, and the change is comparatively simple, use cost is lower.

Description

Butterfly valve

Technical field

The present invention relates to valve technology field, especially relate to a kind of butterfly valve.

Background technology

Butterfly valve is mainly made up of valve body, valve rod, butterfly plate and valve seat. Valve body is cylindrical, and axial length is short,Dish plate is positioned at valve body. When work, butterfly plate is driven by valve rod, if turn over 90 °, opens just can complete onceClose, and change the deflection angle of butterfly plate, flow that can control medium. At present, butterfly valve is mainly used in sending outRaw stove, coal gas, natural gas, liquefied petroleum gas, town gas, cold and hot air, chemical industry are smelted and generatingIn the engineering system such as environmental protection, building water supply and drainage, carry the pipeline of various corrosivity, non-corrosive fluids mediumUpper, for regulating and block flowing of medium.

But the valve seat of butterfly valve or dish plate frequently rub in the time of work, thereby be easy to damage, and moreChange any one parts all comparatively loaded down with trivial details.

Summary of the invention

The deficiency existing for above-mentioned prior art, the object of this invention is to provide a kind of butterfly valve, and it hasParts are not fragile, and change the feature comparatively simple, use cost is lower.

To achieve these goals, the technical solution adopted in the present invention is: butterfly valve, comprise valve body, and shouldValve body has inner chamber, and this inner chamber has first mouth of a river that is positioned at left side and second mouth of a river that is positioned at right side, andThe valve seat and the rotatable dish plate that in this inner chamber, are provided with cast, be fixed with valve rod on this dish plate, this valve rodExtend upwardly to the outside of this valve body, the peristome at described first mouth of a river is provided with step, and this valve seat passes through extremelyFew 3 soket head cap screws are fixed on this step, and between this valve seat and this step also by those interior sixAngle screw is fixed with outer graphite gasket, and meanwhile, the avris of this dish plate is fixed with interior graphite gasket, this outer stoneTampon circle and this interior graphite gasket match.

On the left surface of described dish plate, be fixed with annular pressing plate by screw, this annular pressing plate and this interior stoneBetween tampon circle, be provided with seal washer.

The hardness of described dish plate and valve seat is different.

Described dish plate adopts preparation of metals, and valve seat adopts plastics standby.

Described dish plate adopts pottery preparation, and valve seat adopts cast iron preparation.

Adopt after said structure, the advantage that compared to the prior art the present invention had is: parts are rapid wear notBad, and replacing is comparatively simple, use cost is lower. Dismountable being fixed on of valve seat of butterfly valve of the present inventionFirst mouth of a river place, guarantee and dish plate carry out, under good fit prerequisite, being convenient to change at any time,Very convenient. , between valve seat and dish plate, coordinate by graphite gasket meanwhile, reduced valve seat and dishThe probability of plate wearing and tearing, and make to have obtained in service life of parts prolongation. And valve seat and dish plate can be adoptedWith the material preparation of different hardness, thereby user can select suitable collocation as required, has selectionThe parts of outbalance are thought in the protection oneself of property, have greatly reduced the use cost of product.

Brief description of the drawings

Below in conjunction with drawings and Examples, the present invention is further described:

Fig. 1 is the perspective exploded view of embodiments of the invention.

In figure:

10, valve body, 11, first mouth of a river, 111, step;

20, valve seat, 21, soket head cap screw, 22, outer graphite gasket;

30, dish plate, 31, interior graphite gasket, 321, screw, 322, pressing plate, 323, seal washer;

40, valve rod.

Detailed description of the invention

Embodiment, as shown in Figure 1: butterfly valve, comprise valve body 10, this valve body 10 has inner chamber, this inner chamberThere is first mouth of a river 11 that is positioned at left side and second mouth of a river (not shown on figure) that is positioned at right side, and this is interiorThe valve seat 20 and the rotatable dish plate 30 that in chamber, are provided with cast, be fixed with valve rod 40 on this dish plate 30,This valve rod 40 extends upwardly to the outside of this valve body 10.

Further say, the peristome at this first mouth of a river 11 is provided with step 111. , this first mouth of a river 11The diameter of left part be greater than inner diameter. This valve seat 20 is fixing by least 3 soket head cap screws 21On this step 111, and between this valve seat 20 and this step 111, also pass through those soket head cap screws 21Be fixed with outer graphite gasket 22. Obviously, the internal diameter of this outer graphite gasket 22 should be less than this first mouth of a river11 inside diameter. Meanwhile, the avris of this dish plate 30 is fixed with interior graphite gasket 31, this outer graphite padsCircle 22 and this interior graphite gasket 31 match. , this outer graphite gasket 22 and this interior graphite gasket 31 connectAfter touch, can realize closing of this butterfly valve. Like this, this valve seat 20 can be changed as required, and valveBetween seat 20 and dish plate 30, seal by graphite gasket (i.e. outer graphite gasket and interior graphite gasket)Coordinate, reduced the wearing and tearing between valve seat 20 and dish plate 30.

Optimize, on the left surface of this dish plate 30, be fixed with annular pressing plate 322 by screw 321, shouldBetween annular pressing plate 322 and this interior graphite gasket 31, be provided with seal washer 323. Like this, to a certain degreeOn increased the effect of blocking of this butterfly valve, and make interior graphite gasket 31 assembling and change all more for convenience.

Continue to optimize, this dish plate 30 is different with the hardness of valve seat 20. Such as, this dish plate 30 adopts metalPreparation, valve seat 20 adopts plastics standby; Or this dish plate 30 adopts pottery preparation, valve seat 20 adoptsCast iron preparation. Like this, make the use of butterfly valve have more specific aim, and use cost is lower.

The foregoing is only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention,Every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do, or directlyOr be indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (5)

1. butterfly valve, comprises valve body (10), and this valve body (10) has inner chamber, and this inner chamber has the left side of being positioned atFirst mouth of a river (11) of side and be positioned at second mouth of a river on right side, and in this inner chamber, be provided with the valve seat (20) of castAnd rotatable dish plate (30), on this dish plate (30), be fixed with valve rod (40), this valve rod (40)The outside that extends upwardly to this valve body (10), is characterized in that: the opening at described first mouth of a river (11)Portion is provided with step (111), and this valve seat (20) is fixed on this by least 3 soket head cap screws (21)Step (111) is upper, and also passes through those soket head cap screws between this valve seat (20) and this step (111)(21) be fixed with outer graphite gasket (22), meanwhile, the avris of this dish plate (30) is fixed with interior graphite padsCircle (31), this outer graphite gasket (22) and this interior graphite gasket (31) match.

2. butterfly valve according to claim 1, is characterized in that: the left surface of described dish plate (30)Above be fixed with annular pressing plate (322) by screw (321), this annular pressing plate (322) and this interior stoneBetween tampon circle (31), be provided with seal washer (323).

3. butterfly valve according to claim 1, is characterized in that: described dish plate (30) and valve seat (20)Hardness difference.

4. butterfly valve according to claim 2, is characterized in that: described dish plate (30) adopts metalPreparation, valve seat (20) adopts plastics standby.

5. butterfly valve according to claim 2, is characterized in that: described dish plate (30) adopts potteryPreparation, valve seat (20) adopts cast iron preparation.