阅读说明：本技术 阀座及阀门 (Valve seat and valve ) 是由 姚敏 郭中山 赵建宁 黄斌 李高军 庞忠荣 张国民 张新民 于广吉 赵亮 宋兆季 于 2019-08-16 设计创作，主要内容包括：本发明公开了一种阀座及阀门,所述阀座包括用于抵靠在阀门的阀体上的圆环主体(11)及所述圆环主体(11)的一端设置的用于阻挡在阀门的流体入口处的流体分解部(12),所述流体分解部(12)上设置有多个通孔(121)。本发明提供的技术方案,可以对进入阀门的流体进行分流,降压降噪,避免气蚀产生；而且本发明提供的技术方案可以有效保护阀芯,增加系统稳定运行,且价格低廉。(The invention discloses a valve seat and a valve, wherein the valve seat comprises a circular ring main body (11) which is used for abutting against a valve body of the valve, and a fluid decomposition part (12) which is arranged at one end of the circular ring main body (11) and used for blocking a fluid inlet of the valve, and a plurality of through holes (121) are formed in the fluid decomposition part (12). According to the technical scheme provided by the invention, the fluid entering the valve can be shunted, the pressure is reduced, the noise is reduced, and cavitation is avoided; the technical scheme provided by the invention can effectively protect the valve core, increase the stable operation of the system and has low cost.)

1. A valve seat, characterized in that, the valve seat comprises a circular ring main body (11) used for abutting against a valve body (2) of the valve and a fluid decomposition part (12) arranged at one end of the circular ring main body (11) and used for blocking a fluid inlet (21) of the valve, and a plurality of through holes (121) are arranged on the fluid decomposition part (12).

2. The valve seat according to claim 1, wherein the fluid decomposition part (12) is a cylindrical structure having an outer diameter smaller than that of the annular body (11), and a plurality of the flow dividing through holes (121) are provided at intervals on a wall of the cylindrical structure.

3. Valve seat according to claim 2, wherein a plurality of said flow dividing through holes (121) are evenly arranged in the axial and circumferential direction of said cylindrical structure.

4. Valve seat according to claim 2, characterized in that the end of the cylindrical structure remote from the circular body (11) is provided with a bottom plate (13) covering this end.

5. The valve seat according to claim 4, characterized in that a plurality of bottom through holes (131) are arranged at intervals on the bottom plate (13).

6. The valve seat according to claim 1, wherein the fluid decomposition part (12) is a plate-shaped structure connected to one side of the annular body (11), and a plurality of the flow dividing through holes (121) are formed in the plate-shaped structure.

7. Valve, characterized in that it comprises a valve body (2), a valve seat (1) according to any one of claims 1-6 in an inner cavity of the valve body (2) and a sleeve (3) against the valve seat, wherein the fluid breakup (12) of the valve seat (1) extends into a fluid inlet (21) of the valve body (2).

8. Valve according to claim 7, wherein a first step formation (111) is formed at the edge of the end of the annular body (11) facing away from the fluid decomposition portion (12) for cooperation with the sleeve (3).

9. Valve according to claim 7, characterized in that the edge position of the annular body (11) facing the end of the fluid decomposition portion (12) is formed with a second step structure (112) for abutment against the valve body (2).

10. Valve according to any of claims 7-9, wherein the wall of the sleeve (3) is provided with a plurality of through holes (31).

Technical Field

The invention relates to the technical field of valves, in particular to a valve seat and a valve.

Background

Various devices in the field of coal chemical industry are various, the working condition is complex, the valve operation model selection difficulty is large, high-pressure-difference and double-phase flow media exist, and cavitation flash evaporation working conditions are easy to generate. The valve generally takes cavitation flash evaporation resistance measures as follows: the ability of the valve to resist flash and cavitation damage is increased, including valve type selection (typically multi-stage sleeves or labyrinths), valve trim material selection and treatment.

The multi-stage sleeve type regulating valve is a sleeve-guided low-noise cavitation-resistant regulating valve, and can effectively control fluid speed so as to reduce fluid noise produced by high-pressure difference gas or steam and can effectively prevent cavitation damage produced by high-pressure difference fluid. However, due to the limitations of valve flow capacity, size, and manufacturing cost, the valve still has short service life and environmental impact when subjected to high pressure differential flow.

The carbon dioxide methanol-rich flash tower regulating valve of the coal chemical industry purifying device, the acid water gas device acid water steam stripping tower regulating valve, the carbon monoxide conversion regulating valve of the coal gasification device and the like are all adopted. In the field of coal chemical industry, regulating valves which are easy to generate cavitation flash evaporation working conditions under high pressure difference and dual-phase flow media have serious cavitation erosion and scouring, and have internal leakage and other phenomena. The fatigue operation easily causes the valve to lose efficacy, and the interlocking is stopped, so that the high-quality operation condition is not met.

According to the working condition calculation of the existing device, if a valve which can run more reliably is adopted, the valve needs to be modified into a labyrinth valve or a sleeve with more stages. The valve has high maintenance and construction difficulty and high cost.

Disclosure of Invention

The invention aims to solve the problems of serious cavitation and scouring, internal leakage of a valve and the like existing in a regulating valve which has high pressure difference, double-phase flow medium and is easy to generate cavitation flash evaporation working conditions in the prior art.

In order to achieve the above object, an aspect of the present invention provides a valve seat, which includes a circular ring body for abutting against a valve body of a valve, and a fluid decomposition portion provided at one end of the circular ring body for blocking a fluid inlet of the valve, the fluid decomposition portion being provided with a plurality of through holes.

Preferably, the fluid decomposition portion is a cylindrical structure with an outer diameter smaller than that of the annular main body, and a plurality of the shunt through holes are arranged on the wall of the cylindrical structure at intervals.

Preferably, a plurality of the flow dividing through holes are uniformly arranged in the axial direction and the circumferential direction of the cylindrical structure.

Preferably, a bottom plate covering the end of the cylindrical structure far away from the circular ring main body is arranged at the end of the cylindrical structure.

Preferably, a plurality of bottom through holes are arranged on the bottom plate at intervals.

Preferably, the fluid decomposition portion is a plate-shaped structure connected to one side of the annular body, and the plate-shaped structure is provided with a plurality of the shunt through holes.

According to another aspect of the present invention, there is also provided a valve comprising a valve body, a valve seat as described above located in an internal cavity of the valve body, and a sleeve abutting against the valve seat, wherein the fluid decomposition portion of the valve seat extends into a fluid inlet of the valve body.

Preferably, a first step structure for cooperating with the sleeve is formed at an edge of an end of the annular body facing away from the fluid decomposition portion.

Preferably, an edge of the annular body facing an end of the fluid decomposition portion is formed with a second step structure for abutting against the valve body.

Preferably, the wall of the sleeve is provided with a plurality of through holes.

In the technical scheme provided by the invention, the fluid decomposition part arranged on the valve seat can play a role of shunting fluid in the fluid inlet, divide the fluid into a plurality of small flow beams, and can decompose the concentrated single total energy into a plurality of small energy units, so that the pressure of the medium is reduced, the speed of the fluid is not too high, the pressure drop of the fluid flowing through the valve is controlled not to be lower than the gasification pressure of the fluid medium, bubbles cannot be generated, and the cavitation is avoided. Another advantage of this valve seat design is: when the medium pressure difference is too high, the modified valve seat with low cost is firstly washed, so that the valve core with high cost is well protected. Not only can increase the stable operation of the system, but also is economic and environment-friendly.

Drawings

FIG. 1 is a schematic diagram of a prior art valve;

FIG. 2 is a schematic illustration of a valve seat according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a valve provided with a valve seat according to the present invention.

Description of the reference numerals

1' -existing valve seat; 1-a valve seat; 11-a ring body; 12-a fluid breakup section; 121-shunt vias; 13-a base plate; 131-bottom via hole; 111-a first step configuration; 112-a second step structure; 2-a valve body; 21-a fluid inlet; 22-a fluid outlet; 3-sleeving a pipe; 31-through hole.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting. The term "inside" and "outside" refer to the inside and the outside of the contour of each member itself.

The invention provides a valve seat, as shown in fig. 2, the valve seat comprises a circular ring main body 11 which is used for abutting against a valve body of a valve, and a fluid decomposition part 12 which is arranged at one end of the circular ring main body 11 and used for blocking in a fluid inlet of the valve, wherein a plurality of shunt through holes 121 are arranged on the fluid decomposition part 12.

When the valve seat provided by the invention is applied to a valve, such as the valve shown in fig. 3, the valve seat 1 is abutted against the valve body 2, the fluid decomposition part 12 with a plurality of flow dividing through holes 121 extends into the fluid inlet 21 of the valve body 2, fluid entering the fluid inlet 21 rushes towards the fluid decomposition part 12, can enter a cavity of the valve body from the flow dividing through holes 121 and then flows out from the fluid outlet 22, the fluid decomposition part 12 can play a role of dividing the fluid in the fluid inlet 21, divides the fluid into a plurality of small flow beams, and decomposes concentrated single total energy into a plurality of small energy units, so that the water pressure is reduced, the fluid speed is not too high, the pressure drop of the fluid flowing through the valve is controlled not to be lower than the gasification pressure of a fluid medium, the pressure is reduced, the noise is reduced, bubbles cannot be generated, and the. In addition, another advantage is obtained with this valve seat design: when the medium pressure difference is too high, the modified valve seat with low cost is firstly washed, so that the valve core with high cost is well protected. Not only can increase the stable operation of the system, but also is economic and environment-friendly.

In a preferred embodiment of the present invention, the fluid decomposition portion 12 has a cylindrical structure having an outer diameter smaller than that of the annular main body 11, and a plurality of the flow dividing through holes 121 are provided at intervals on a wall of the cylindrical structure. When the valve seat 1 is mounted in a valve, the fluid decomposition portion 12 of the cylindrical structure extends into the fluid inlet 21. In the valve seat 1 shown in fig. 2 and 3, compared with the conventional valve seat 1 'shown in fig. 1 in the prior art, the valve seat 1 shown in fig. 2 and 3 has a tubular fluid decomposition portion 12 extending downward from the conventional valve seat 1'.

Preferably, the plurality of flow dividing through holes 121 on the cylindrical structure are uniformly arranged in the axial direction and the circumferential direction.

Further, a bottom plate 13 is provided at one end (lower end in fig. 2) of the cylindrical structure, which is remote from the ring main body 11, so as to cover the end. The bottom plate 13 is provided with a plurality of bottom through holes 131 at intervals. The fluid in the fluid inlet 21 can enter the cavity of the valve body through the shunt through hole 121 on the side wall of the cylindrical structure and the bottom through hole 131 on the bottom plate 13, so that the shunt can be effectively realized, and the flushing of the fluid pressure on the valve is reduced.

It will be understood by those skilled in the art that the fluid decomposition portion 12 is not limited to the cylindrical structure in the present application, and other structures are possible. For example, the fluid decomposition portion 12 is a plate-shaped structure connected to one side of the annular body 11, and the plate-shaped structure is provided with a plurality of the flow dividing through holes 121. When the arc main body 11 of the valve seat is abutted against the valve body, the fluid decomposition part 12 with the plate-shaped structure can also play a role in shunting and depressurizing.

In addition, with reference to fig. 2 and 3, a first step structure 111 for matching with the sleeve 3 in the valve body 2 is formed at the edge of one end of the annular main body 11 facing away from the fluid decomposition portion 12, and a second step structure 112 for abutting against the valve body 2 is formed at the edge of one end of the annular main body 11 facing towards the fluid decomposition portion 12. As shown in fig. 3, the sleeve 3 in the valve body 2 may abut against the first step structure 111 of the annular main body 11, thereby firmly fixing the valve seat 1 to the valve body 2.

The size of the flow dividing through hole 121 on the fluid decomposition part 12 of the valve seat 1 provided by the invention can be specifically set according to the pressure drop to be controlled.

The valve seat 1 can be made of different materials and by different methods. Preferably, valve seat 1 adopts integrative casting shaping, and welded structure is compared to integrative casting shaping's valve seat, and the reliability is stronger, and intensity is high, more resistant scouring.

According to another aspect of the present invention, there is also provided a valve, as shown in fig. 3, comprising a valve body 2, a valve seat 1 as described above located in an inner cavity of the valve body 2, and a sleeve 3 pressing on the valve seat 1, wherein the fluid decomposition portion 12 of the valve seat 1 extends into a fluid inlet 21 of the valve body 2.

Preferably, the wall of said sleeve 3 is provided with a plurality of through holes 31. Fluid enters the casing 3 from the fluid inlet 21 through the fluid decomposition portion 12 and then enters the fluid outlet 22 through the through hole 31 of the casing 3. The provision of the through-hole 31 in the sleeve 3 also serves to split and depressurize the fluid.

In this embodiment, a first step structure 111 formed at one end of the annular main body 11 of the valve seat 1 is in fit contact with the sleeve 3, and a second step structure 112 formed at the other end abuts against the valve body 2. The sleeve 3 in the valve body abuts against the ring body 11 to firmly fix the valve seat 1 to the valve body 2.

It can be understood by those skilled in the art that the valve provided by the present invention is not limited to the structure form in the embodiment shown in fig. 3, and the valve including the valve seat 1 having the fluid decomposition portion 12 provided by the present invention is the technical solution to be protected by the present invention.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.