CN208311533U - A kind of fire prevention floating ball valve - Google Patents

Abstract

The utility model relates to a kind of fire prevention floating ball valves, including valve body, sphere and the valve seat being arranged between valve body and sphere, valve body has the valve axis perpendicular with the pivot center of sphere, valve seat includes valve seat insert, bracing ring and fire-protection ring, the valve seat insert is tapered sleeve shape structure made of metal, tapered sleeve shape structure has bigger diameter end and miner diameter end, valve seat insert is arranged along valve axis direction and its miner diameter end is resisted against on the sphere, on the surface for being in contact with the sphere of the valve seat insert and/or surface for being in contact with valve seat insert of the sphere is equipped with nonmetallic coating；The fire-protection ring is graphite circle, and the bracing ring is the nonmetallic circle for flexibly supporting the valve seat insert, and fire-protection ring and bracing ring are pressed on valve body by valve seat insert.Compared with the prior art, valve seat construction is simple, reduces difficulty of processing, and in addition valve seat is smaller to ball valve rotary resistance, keeps sphere rotation more flexible.

Description

A kind of fire prevention floating ball valve

Technical field

The utility model belongs to valve field, and in particular to a kind of fire prevention floating ball valve.

Background technique

Ball valve is a kind of very common valve device, is divided into Fixed ball valve and float ball valve, Fixed ball valve Sphere be it is fixed, will not generate movement after compression, and the sphere of float ball valve is to float, under pressure medium effect, Sphere can generate certain displacement and be pressed on the sealing surface of outlet end, guarantee outlet end sealing.

The Chinese utility model patent that notification number is CN204852444U, the day for announcing is 2015.12.09 discloses a kind of floating Dynamic ball seat, including bracing ring, valve seat insert and spring, bracing ring include blocking portion and sealing, blocking portion and sealing Portion's connection, valve seat insert are mounted in the sealing of bracing ring, and valve seat insert seals with sphere and valve body contact, Spring is arranged between end face and valve body of the bracing ring far from sphere, for providing pretightning force to sphere.

Existing floating ball valve can satisfy general operational requirement, but there is problems: 1, bracing ring and valve seat are close Structure is complicated for seal, and difficulty of processing is larger；2, valve seat insert and sphere contact area are larger, and when rotational handle needs larger torsion Square.

Utility model content

The purpose of this utility model is to provide a kind of new structural fire prevention floating ball valves, to solve existing floating ball valve The existing above problem.

To achieve the above object, the following technical solution is employed for the fire prevention floating ball valve of the utility model: a kind of fire prevention is floating Dynamic ball valve includes valve body, sphere and the valve seat being arranged between valve body and sphere, and valve body has mutually to hang down with the pivot center of sphere Straight valve axis, valve seat include valve seat insert, bracing ring and fire-protection ring, and the valve seat insert is cone made of metal Shape structure is covered, tapered sleeve shape structure has bigger diameter end and miner diameter end, and valve seat insert is arranged along valve axis direction and its path End is resisted against on the sphere, on the surface for being in contact with the sphere of valve seat insert and/or the use of the sphere Nonmetallic coating is equipped in the surface being in contact with valve seat insert；The fire-protection ring is graphite circle, close valve seat on valve body The position of the bigger diameter end of sealing ring is equipped with fire-protection ring installation cavity, and fire-protection ring is mounted in fire-protection ring installation cavity and by valve seat insert Bigger diameter end compress；The bracing ring is nonmetallic circle for flexibly supporting the valve seat insert, close with valve seat on valve body The corresponding position of the inner conical surface of seal is equipped with bracing ring erecting bed, and bracing ring is pressed on the bracing ring by valve seat insert pacifies It fills on platform.

The utility model has the advantages that initial assembled state, the compressed generation flexible deformation of valve seat insert made of metal, valve seat are close The small end of seal is resisted against on sphere, bigger diameter end is pressed on fire-protection ring, and nonmetallic coating and sphere are combined closely and generated initially Sealing；Bracing ring is compressed simultaneously, generates flexible deformation, bracing ring and valve body and valve seat insert generates sealing.

After sphere is by medium active force, the further compression valve seat sealing ring of sphere, bracing ring carries out valve seat insert Support avoids that excessive deformation occurs；When pipeline kindling, the nonmetallic coating of bracing ring and valve seat insert is burned out, this When valve seat insert metal surface contacted with sphere, valve seat insert compress fire-protection ring, thus effectively completely cut off fire source, guarantee pipe Road safety.

Compared with the prior art, bracing ring and valve base sealing coil structures are simple, and difficulty of processing is low, do not need setting spring； In addition, it is not necessary that the processed springs mounting hole in valve body, reduces valve body difficulty of processing；Valve seat insert and bracing ring are made mutually With, it is ensured that certain pretightning force guarantees that ball valve sealing is reliable；In addition, the tapered sleeve shape structure of valve seat insert and connecing for sphere Contacting surface accumulates smaller, torque needed for reducing operation handle, keeps sphere rotation more flexible.

Further, the nonmetallic coating is polytetrafluorethylecoatings coatings, nylon coating or peek coating.

Further, the bracing ring is made of polytetrafluoroethylene (PTFE) or nylon.

Further, the tapered sleeve shape structure of the valve seat insert is towards the centre of sphere of the sphere, make valve seat insert with Active force between sphere makes entity uniform force everywhere towards solid centre, avoids that excessive deformation occurs, extends and use the longevity Life.

Further, the end face for compressing the fire-protection ring of the valve seat insert is the rotation axis with the sphere Parallel and perpendicular with the valve axis plane of line.

Detailed description of the invention

Fig. 1 is the cross-sectional view of the specific embodiment of the fire prevention floating ball valve of the utility model；

Fig. 2 is the enlarged drawing in Fig. 1 at A.

In figure: 1- valve body, 2- sphere, 3- valve seat, 4- valve seat insert, 5- bracing ring, 6- fire-protection ring, the nonmetallic painting of 7- Layer, 8- bracing ring erecting bed.

Specific embodiment

Below in conjunction with attached drawing, the technical solution of the utility model is clearly and completely described, it is clear that described Embodiment be only the utility model a part of the embodiment, instead of all the embodiments.Based in the utility model Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the range of the utility model protection.

As Figure 1-Figure 2, fire prevention floating ball valve includes valve body 1, sphere 2 and valve seat 3, and valve body 1 has turn with sphere 2 The perpendicular valve axis of shaft line, valve seat 3 include valve seat insert 4, bracing ring 5 and fire-protection ring 6, and valve seat insert 4 is served as reasons Tapered sleeve shape structure made of metal, tapered sleeve shape structure have bigger diameter end and miner diameter end.

Valve seat insert 4 is arranged along valve axis direction and its miner diameter end is resisted against on sphere 2, valve seat insert 4 Surface for being in contact with sphere 2 is equipped with nonmetallic coating 7, and nonmetallic coating 7 is polytetrafluorethylecoatings coatings, nylon coating Or peek coating.

Fire-protection ring 6 is graphite circle, and the position of the bigger diameter end of close valve seat insert 4 is equipped with fire-protection ring installation cavity on valve body 1, Fire-protection ring 6 is mounted in fire-protection ring installation cavity and is compressed by the bigger diameter end of valve seat insert 4, and valve seat insert 4 is used to compress The end face of fire-protection ring 6 is the plane parallel and perpendicular with valve axis with the pivot center of sphere 2.

Bracing ring 5 is the nonmetallic circle for flexibly supporting valve seat insert 4, and the bracing ring 5 in the present embodiment is by poly- four Vinyl fluoride or nylon are made, and position corresponding with the inner conical surface of valve seat insert 4 is equipped with bracing ring erecting bed 8, valve on valve body 1 Bracing ring 5 is pressed on bracing ring erecting bed 8 by seat sealing ring 4.

Further, the tapered sleeve shape structure of valve seat insert 4 makes valve seat insert 4 and sphere 2 towards the centre of sphere of sphere 2 Between active force towards solid centre, make entity uniform force everywhere, avoid occur excessive deformation, prolong the service life.

Initial assembled state, the compressed generation flexible deformation of valve seat insert 4 made of metal, valve seat insert 4 Small end is resisted against on sphere 2, bigger diameter end is pressed on fire-protection ring 6, nonmetallic coating 7 combine closely with sphere 2 generate it is initial close Envelope；Bracing ring 5 is compressed simultaneously, generates flexible deformation, bracing ring 5 and valve body 1 and valve seat insert 4 generates sealing.

After sphere 2 is by medium active force, the further compression valve seat sealing ring 4 of sphere 2, bracing ring 5 is to valve seat insert 4 It is supported, avoids that excessive deformation occurs；When pipeline kindling, bracing ring 5 and nonmetallic coating 7 are burned out, at this time valve seat The metal surface of sealing ring 4 is contacted with sphere 2, to effectively completely cut off fire source, guarantees pipe safety.

Compared with the prior art, bracing ring 5 and 4 structure of valve seat insert are simple, and difficulty of processing is low；In addition, it is not necessary that setting Spring is set, the processed springs mounting hole in valve body is not needed, reduces 1 difficulty of processing of valve body；In addition, valve seat insert 4 and branch Support ring 5 interacts, it is ensured that certain pretightning force guarantees that ball valve sealing is reliable；In addition, the tapered sleeve shape structure of valve seat insert Smaller with the contact area of sphere, torque needed for reducing operation handle keeps sphere rotation more flexible.

In other embodiments, nonmetallic coating can also be arranged in and is used to be in contact with valve seat insert on sphere On surface；Or simultaneously on valve seat insert and sphere setting for another nonmetallic coating contacted in the two.

Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to In this, anyone skilled in the art within the technical scope disclosed by the utility model, the change that can be readily occurred in Change or replace, should be covered within the scope of the utility model.

Claims (5)

1. a kind of fire prevention floating ball valve, including valve body, sphere and the valve seat being arranged between valve body and sphere, valve body has and ball The perpendicular valve axis of the pivot center of body, valve seat include valve seat insert, bracing ring and fire-protection ring, it is characterised in that: institute Stating valve seat insert is tapered sleeve shape structure made of metal, and tapered sleeve shape structure has bigger diameter end and miner diameter end, valve seat insert Along the setting of valve axis direction and its miner diameter end is resisted against on the sphere, and valve seat insert is used to connect with the sphere On the surface of the touching and/or surface for being in contact with valve seat insert of the sphere is equipped with nonmetallic coating；It is described anti- Pyrosphere is graphite circle, and the position of the bigger diameter end of close valve seat insert is equipped with fire-protection ring installation cavity on valve body, and fire-protection ring is mounted on It is compressed in fire-protection ring installation cavity and by the bigger diameter end of valve seat insert；The bracing ring is for flexibly supporting the valve base sealing The nonmetallic circle of circle, position corresponding with the inner conical surface of valve seat insert is equipped with bracing ring erecting bed, valve base sealing on valve body Bracing ring is pressed on the bracing ring erecting bed by circle.

2. fire prevention floating ball valve according to claim 1, it is characterised in that: the nonmetallic coating is polytetrafluoroethylene (PTFE) painting Layer, nylon coating or peek coating.

3. fire prevention floating ball valve according to claim 1 or 2, it is characterised in that: the bracing ring by polytetrafluoroethylene (PTFE) or Nylon is made.

4. fire prevention floating ball valve according to claim 1 or 2, it is characterised in that: the tapered sleeve shape knot of the valve seat insert The centre of sphere of the structure towards the sphere.

5. fire prevention floating ball valve according to claim 4, it is characterised in that: the valve seat insert it is described for compressing The end face of fire-protection ring is the plane parallel and perpendicular with valve axis with the pivot center of the sphere.