阅读说明：本技术 一种弹性阀座及球阀 (Elastic valve seat and ball valve ) 是由 刘丽双 王晓峰 佟锡江 张锐 刘振兴 夏全义 贺建勋 李洪波 杨鹤 那兴寨 张宁 于 2020-05-25 设计创作，主要内容包括：本发明公开了一种弹性阀座及球阀,所述弹性阀座包括环状本体和弹性件,其中,所述弹性件位于所述环状本体内。所述球阀包括球体和上述的弹性阀座,所述弹性阀座的所述环状本体具有与所述球体相适应的贴合面。本发明实施例通过在环状本体内设置弹性件,增加了阀座的复原量,增加阀座密封性,从而有效减缓硬质颗粒对阀座的冲击和碾磨,避免阀门内漏,延长阀座的使用寿命。(The invention discloses an elastic valve seat and a ball valve. The ball valve comprises a ball body and the elastic valve seat, wherein the annular body of the elastic valve seat is provided with a binding surface matched with the ball body. According to the embodiment of the invention, the elastic piece is arranged in the annular body, so that the restoration amount of the valve seat is increased, and the sealing property of the valve seat is increased, thereby effectively slowing down the impact and grinding of hard particles on the valve seat, avoiding the internal leakage of the valve and prolonging the service life of the valve seat.)

1. An elastomeric valve seat comprising an annular body and an elastomeric member, wherein the elastomeric member is located within the annular body.

2. The elastomeric valve seat of claim 1, wherein a hollow ring is formed within said annular body, said elastomeric member being seated within said hollow ring.

3. The elastomeric valve seat of claim 2, wherein said elastomeric member is a coil spring coiled within said hollow ring.

4. A resilient valve seat according to claim 1, wherein the annular body is of metal or a soft sealing material.

5. A resilient valve seat according to claim 4, wherein, when the annular body is a soft sealing material, the resilient member is a coil spring encased within the annular body.

6. A resilient valve seat according to claim 3, wherein an outer wall of the helical spring abuts an inner wall of the hollow ring.

7. A resilient valve seat according to claim 2 or 3, wherein the hollow ring is circular in cross-section.

8. A resilient valve seat according to claim 2 or 3, wherein the annular body has an abutment surface adapted to the ball, and wherein the hollow ring has a first thickness between its inner wall and the abutment surface.

9. A resilient valve seat according to claim 1, wherein the cross-section of the annular body is C-shaped, O-shaped, octagonal, oval or square.

10. A ball valve comprising a ball and a resilient seat according to any one of claims 1 to 9, the annular body of the resilient seat having an abutment surface adapted to the ball.

Technical Field

The invention relates to the technical field of valve production, in particular to an elastic valve seat and a ball valve.

Background

Ball valves are a new type of valve that has been widely used in recent years. The ball valve is divided into a soft seal ball valve and a metal hard seal ball valve. The sealing grade of the soft sealing ball valve is higher than that of the metal hard sealing ball valve. But the soft seal ball valve has strict requirements on temperature and is not suitable for the working condition of overhigh temperature. Therefore, under high temperature conditions, a metal hard sealing ball valve is required, and the sealing performance of the metal hard sealing ball valve can reach the same sealing grade as that of a soft sealing ball valve.

To solve this problem, orbital ball valves are widely used in various devices of the prior art. The track ball valve is a single-valve-seat bidirectional sealing ball valve, the valve seat adopts a hollow O-shaped metal ring structure, the O-shaped metal ring structure belongs to a metal hard sealing ball valve, and the elasticity of the valve seat is increased while certain hardness is ensured, so that the sealing grade is further improved, the hard metal collision sealing condition between the valve seat and a ball body is reduced, and the sealing property of the valve seat is enhanced.

However, when the media is particles, direct contact occurs between the valve seat, the valve ball and the hard particles. For ball valves, the valve seat of the hollow "O-ring" metal ring structure is less hard and wear first occurs on the valve seat. The long-term impact and grinding of the hard particles can increase the roughness of the surface of the valve seat, finally reduce the sealing performance of the valve seat and even cause the internal leakage of the valve to cause the failure of the shutoff. In the actual use process, the operation and maintenance cost of the production device caused by the reduction of the sealing performance of the valve seat is increased, even the medium leakage accident is caused to happen occasionally, and the operation safety risk of the production device is increased.

Based on this, the prior art still remains to be improved.

Disclosure of Invention

In order to solve the technical problems, the embodiment of the invention provides an elastic valve seat and a ball valve, so as to solve the technical problem that the sealing performance of the valve seat is poor under the high-temperature working condition in the prior art.

In one aspect, an elastic valve seat disclosed in embodiments of the present invention includes an annular body and an elastic member, where the elastic member is located in the annular body.

Further, a hollow ring is arranged in the annular body, and the elastic piece is arranged in the hollow ring.

Further, the elastic piece is a spiral spring, and the spiral spring is wound in the hollow ring.

Further, the free length of the coil spring is equal to the circumference of the hollow ring.

Further, the outer diameter of the coil spring in a free state is equal to or slightly larger than the inner diameter of the hollow ring.

Further, the radius of curvature of the coil spring is the same as that of the hollow ring.

Further, the annular body is made of metal or soft sealing material.

Further, when the annular body is made of soft sealing material, the elastic element is a coil spring, and the coil spring is wrapped in the annular body.

Further, the coil spring abuts against an inner wall of the hollow ring.

Further, the cross section of the hollow ring is circular.

Further, the annular body is provided with a joint surface adapted to the sphere, and a first thickness is formed between the inner wall of the hollow ring and the joint surface.

Further, the section of the annular body is C-shaped, O-shaped, octagonal, oval or square.

On the other hand, the embodiment of the invention also discloses a ball valve which comprises a ball body and the elastic valve seat, wherein the annular body of the elastic valve seat is provided with a joint surface matched with the ball body.

By adopting the technical scheme, the invention at least has the following beneficial effects:

according to the embodiment of the invention, the elastic piece is arranged in the annular body, so that the restoration amount of the valve seat is increased, and the sealing property of the valve seat is increased, thereby effectively slowing down the impact and grinding of hard particles on the valve seat, avoiding the internal leakage of the valve and prolonging the service life of the valve seat. To the disk seat of metal material, through setting up coil spring, can further increase the hardness of disk seat, further prolong the life of disk seat, to the disk seat of soft sealing material, through at its inner cladding coil spring, increase disk seat intensity for its high temperature resistance can promote. In addition, for the valve seat made of metal, because the spiral spring is arranged to provide part of hardness, the thickness between the inner wall of the hollow ring and the binding surface can be reduced, the volume of the valve seat is further reduced, and the precision and the small volume of the valve are facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a ball valve according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional structural view of a resilient valve seat according to an embodiment of the present invention.

Fig. 3 is a partial sectional structural view of the elastic valve seat of the embodiment of the present invention when the elastic member is not mounted.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.

Referring to fig. 1, 2 and 3, some embodiments of the present invention disclose an elastic valve seat 4 and a ball valve, the elastic valve seat may be a covered elastic valve seat, the elastic valve seat 4 includes an annular body 1 and an elastic member 3, wherein the elastic member 3 is located in the annular body 1. This embodiment is through set up elastic component 3 in cyclic annular body 1, has increased disk seat 4's recovery volume, increases disk seat 4 leakproofness to effectively slow down the impact of stereoplasm granule to disk seat 4 and mill, leak in avoiding the valve, prolong disk seat 4's life. When the elastic valve seat is used for a ball valve, the annular body 1 of the elastic valve seat 4 is provided with a joint surface 5 which is matched with a ball body 6 of the ball valve.

According to the elastic valve seat 4 and the ball valve disclosed by some embodiments of the invention, on the basis of the above embodiments, the annular body 1 is internally provided with the hollow ring 2, and the elastic member 3 is arranged in the hollow ring 2. In particular, the elastic member 3 may be a coil spring wound inside the hollow ring 2. The metal spring can be selected and matched with the annular body 1 made of metal materials, so that the overall hardness and the heat resistance of the valve seat 4 are ensured. The metal coil spring can be abutted against the inner wall of the hollow ring 2 of the annular body 1, so that the supporting force is better provided, and the hardness of the annular body 1 is increased. The sealing performance of the metal hard sealing valve seat 4 can be improved, the inner leakage caused by the abrasion of the valve seat 4 is reduced, the service life of the valve seat 4 is prolonged, and the application field of the metal hard sealing valve is widened.

In some embodiments of the present invention, in order to further provide a supporting force for the annular body and increase the rigidity of the annular body, the free length of the coil spring is equal to the circumference of the hollow ring. The outer diameter of the spiral spring in a free state is equal to or slightly larger than the inner diameter of the hollow ring.

In some preferred embodiments of the present invention, the annular body 1 has an abutting surface 5 corresponding to the ball 6, and the inner wall of the hollow ring 2 and the abutting surface 5 have a first thickness therebetween, and the coil spring at least abuts against the inner wall of the hollow ring 2 opposite to the abutting surface 5 to directly provide a supporting force, increase the hardness and the amount of restoration, reduce the wear, and prolong the service life.

According to the elastic valve seat 4 and the ball valve provided by some embodiments of the invention, the annular body 1 is made of a soft sealing material. Preferably, when the annular body 1 is made of a soft sealing material, the elastic member 3 is a coil spring, and the coil spring is wrapped in the annular body 1. The spiral spring can also rotate the metal material, can effectively increase the strength of the soft sealing material, and improve the high temperature resistance degree of the soft sealing material. Proved by verification, compared with the elastic valve seat 4 which is not coated with the soft sealing material of the metal spiral spring, the high temperature resistant degree of the elastic valve seat 4 coated with the soft sealing material of the metal spiral spring can be improved by 20-30 ℃.

According to the elastic valve seat 4 and the ball valve provided by some embodiments of the invention, the cross section of the hollow ring 2 is circular. The manufacturing method comprises the following steps: can select the suitable pipe of size for use, penetrate the elastomer coil spring promptly in the pipe, then enclose the pipe and become cyclic annular body 1, the inner space of pipe forms hollow ring 2, and the mode welding that spot welding can be adopted together in pipe and coil spring's head and the tail both ends, can also adopt other suitable modes to connect certainly. The second manufacturing method comprises the following steps: the ring-shaped body can also be formed by welding two sides of a thin steel plate to form a cylinder shape and then welding the cylinder structure end to end.

In the elastic valve seat 4 and the ball valve disclosed in some embodiments of the present invention, on the basis of the above embodiments, the first thickness may be set as required, and in principle, because the coil spring is added to provide the supporting force, the hardness and the restoring force, under the same working condition, the first thickness may be smaller than the thickness without adding the coil spring. If to the disk seat 4 that adopts the pipe as cyclic annular body 1, the wall thickness of pipe can correspondingly reduce, correspondingly, can suitably adjust the size of spheroid 6 simultaneously, and then can realize the disk seat 4 small volumization, the ball valve is small volumization, is favorable to the precision and the small volumization of valve.

In the elastic valve seat 4 and the ball valve disclosed in some preferred embodiments of the present invention, the abutting portion of the coil spring and the hollow ring 2 is preferably configured to be in surface contact, which not only ensures the supporting force and provides corresponding hardness, but also ensures sufficient restoring force and supporting distance.

In the elastic valve seat and the ball valve disclosed by some embodiments of the present invention, the cross section of the annular body 1 is C-shaped, O-shaped, octagonal, elliptical or square. Wherein, the elasticity of C type disk seat 4 is better, and sealing performance is better.

In summary, when the elastic valve seat and the ball valve disclosed by the embodiments of the present invention are used for a valve seat made of a metal material, a spring with the same curvature radius is spirally wound inside the valve seat, so that the sealing performance of the valve seat is improved, the hardness of the valve seat is also increased, and the practical problems are solved. The required hardness of the metal valve seat is ensured, and meanwhile, the sealing performance of the metal valve seat is not reduced. Has at least the following advantages:

the valve seat has elasticity, large recovery and excellent sealing performance.

The valve seat hardness is improved, and the impact of particle media is resisted.

The joint of the valve seat and the valve body is not affected, and the material selection of the original valve and the valve seat can not be changed.

The manufacturing equipment of the valve does not need to be replaced, the utilization rate is high, and the investment is saved.

The application field of the ball valve is enlarged.

Similarly, the elastic valve seat is applied to a common ball valve, and under high-temperature and severe working conditions, the service life of the ball valve is greatly prolonged by the structure. The coating structure can be also applied to rubber and other soft sealing valve seats, namely the spring is coated by rubber and other soft sealing materials, so that the service temperature of the soft sealing valve seat can be improved to a greater extent, and even can reach the same service temperature as the metal valve seat.

It should be particularly noted that the various components or steps in the above embodiments can be mutually intersected, replaced, added or deleted, and therefore, the combination formed by the reasonable permutation and combination conversion shall also belong to the protection scope of the present invention, and the protection scope of the present invention shall not be limited to the embodiments.

The above is an exemplary embodiment of the present disclosure, and the order of disclosure of the above embodiment of the present disclosure is only for description and does not represent the merits of the embodiment. It should be noted that the discussion of any embodiment above is exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to those examples, and that various changes and modifications may be made without departing from the scope, as defined in the claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.