WO2018076157A1

WO2018076157A1 - Novel anti-erosion control valve

Info

Publication number: WO2018076157A1
Application number: PCT/CN2016/103172
Authority: WO
Inventors: 吴振宇
Original assignee: 南通龙源电站阀门有限公司
Priority date: 2016-10-25
Filing date: 2016-10-25
Publication date: 2018-05-03

Abstract

Disclosed is an anti-erosion control valve, comprising: a valve body (1), a valve cover (2), a valve rod (4), a valve core (5), a valve seat (3) and a throttling element (6); the throttling element is formed from a plurality of orifice plate assemblies (8) stacked together, wherein an orifice plate assembly comprises an orifice plate body (9), the orifice plate body assuming an annular shape, and a lower end of the orifice plate body being provided with a ring-shaped groove; the ring-shaped groove is divided by a partition plate (10) into two groups of coaxially distributed ring-shaped flow channels, being a ring-shaped flow channel A (12) and a ring-shaped flow channel B (11) sequentially from inside to outside; a hole A (13) which communicates with the ring-shaped flow channel A is opened on an inner wall of the orifice plate body, a hole B (14) which communicates with both the ring-shaped flow channel A and the ring-shaped flow channel B is opened on the partition plate, and a hole C (15) which communicates with the ring-shaped flow channel B is opened on an outer wall of the orifice plate body, wherein the hole A, the hole B and the hole C are in staggered distribution. The control valve may effectively reduce the pressure and the flow rate of a medium, thereby achieving the effect of balancing, stabilizing and regulating the flow of the medium.

Description

A new anti-scour control valve

Technical field

The invention relates to a valve, in particular to a novel anti-washing regulating valve.

Background technique

The regulating valve, also known as the control valve, in the field of industrial automation process control, by accepting the control signal output by the regulating control unit, by means of the power operation to change the flow area of the medium, to achieve the final control device for the flow parameters, pressure, liquid level and other process parameters. It usually consists of an actuator and a valve. If the stroke characteristics are selected, the regulating valve can be divided into straight stroke and angular stroke. According to the power used by the actuators, it is divided into linear characteristics, equal percentage characteristics and parabolic characteristics according to its functions and characteristics. The regulating valve is suitable for air, water, steam, various corrosive media, mud, oil and other media. English name :control valve, the commonly used classification of regulating valves: pneumatic regulating valve, electric regulating valve, hydraulic regulating valve, self-operated regulating valve.

For the throttling element in the regulating valve, the conventional structure is a sleeve type structure or an orifice plate type structure. When such a structure is used for throttling, the pressure of the medium is large, and the corresponding flow rate is fast, so when the flow rate is adjusted The adjustment effect is not good.

Summary of the invention

The technical problem to be solved by the present invention is to provide a novel anti-scour control valve, which can effectively reduce the pressure and flow rate of the medium circulation, and achieve a good throttling effect.

In order to solve the above technical problem, the technical solution of the present invention is: a new anti-scour control valve, the regulating valve includes a valve body, and a valve cover is used at the upper end of the valve body, and the valve body has a passage through which the medium is circulated and a cavity in which the valve stem is movable, the valve stem extends from the middle of the bonnet from the top to the bottom of the valve body, and a valve core is connected to the lower end of the valve stem. A valve seat mounted on the valve body is disposed under the valve core, and the valve core cooperates with the valve seat to form a sealing pair. At the upper end of the valve seat, a throttle element is disposed on the outer circumference of the valve core, and the innovation point is Lie in:

The throttling element is formed by stacking a plurality of orifice plate assemblies arranged on the outer circumference of the valve core from bottom to top;

The orifice plate assembly comprises an orifice plate body, the orifice plate body has an annular shape, and an annular groove is arranged at a lower end of the orifice plate body, and the annular groove is divided by a partition plate into two sets of coaxially distributed annular flow. The passage, from the inside to the outside, is an annular flow passage A and an annular flow passage B. The inner wall of the orifice main body is provided with a hole A communicating with the annular flow passage A, and the annular passage A and the annular passage are opened on the partition. The hole B of the flow path B has a hole C communicating with the annular flow path B on the outer wall of the orifice body, and the holes A, B and C are alternately distributed.

Further, the holes A, B and C are uniformly distributed in the circumferential direction.

The invention has the advantages that: in the invention, by designing the throttling assembly to hide into the combined structure of the annular flow passage, the medium increases the distance of the medium circulation stroke when passing through the throttling assembly, and the medium can be effectively reduced. The pressure, the corresponding flow rate is also reduced, so as to achieve the characteristics of balanced and stable regulation of the flow of the medium, without fluctuations.

By arranging the holes A, B and C uniformly in a circumferential direction, it is also convenient for the medium to be evenly distributed when passing through the throttling assembly.

DRAWINGS

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

Figure 1 is a schematic view of a novel anti-scour control valve of the present invention.

2 is a schematic view of a throttling element of a novel anti-scour control valve of the present invention.

Figure 3 is a bottom plan view of the orifice plate assembly of the novel anti-scour adjustment valve of the present invention.

Figure 4 is a side elevational view of the orifice plate assembly of the novel anti-scour adjustment valve of the present invention.

detailed description

The following examples are intended to provide a fuller understanding of the invention, and are not intended to limit the invention.

A new anti-scoo control valve as shown in FIG. 1 includes a valve body 1, a valve cover 2, a valve seat 3, a valve stem 4, a valve core 5 and a throttle element 6.

At the upper end of the valve body 1, there is a valve cover 2 for use therewith. The valve cover 2 is fixed between the valve body 1 and the valve body 1. The valve body 1 has a passage 7 through which the medium flows and a valve stem 4 The movable cavity, the valve stem 4 extends from the top position of the valve cover 2 from the top to the bottom into the cavity of the valve body 1, and a valve core 5 is connected to the lower end of the valve stem 4, and a valve core 5 is disposed below the valve core 5. The valve seat 3 is mounted on the valve body 1, and the sealing surface of the valve body 5 cooperates with the sealing surface of the valve seat 3 to form a sealing pair. At the upper end of the valve seat 3, a throttle is disposed on the outer circumference of the valve body 5 Element 6.

As can be seen from the schematic diagram shown in FIG. 2, the throttle element 6 is stacked by a plurality of orifice plate assemblies 8 which are sequentially distributed from the bottom to the top on the outer circumference of the valve body 5.

As shown in FIG. 3 and FIG. 4, the orifice plate assembly 8 includes an orifice plate body 9 having an annular shape. The lower end of the orifice plate body 9 is provided with an annular groove, and the annular groove is formed by a partition 10 Separated into two sets of coaxially distributed annular flow passages, from the inside to the outside, an annular flow passage A12 and an annular flow passage B11, and an inner wall of the orifice main body 9 is provided with a hole A13 communicating with the annular flow passage A12, the hole A13 There are three in total, in a shape-shaped distribution, and a hole B14 connecting the annular flow passage A12 and the annular flow passage B11 is opened in the partition plate 10. The hole B14 has three in total, and is distributed in a shape of a letter on the outer wall of the orifice plate main body 9. A hole C15 communicating with the annular flow path B11 is opened, and the holes C15 are three in total, and are arranged in a shape of a shape, and the holes A13, B14 and C15 are alternately distributed.

When passing through the throttling element 6, the medium first flows into the annular flow channel A12 from the three holes A13, respectively, and the medium in the annular flow channel A12 needs to travel to reach the position of the hole B14 after a stroke, and then flows from the hole B14. In the annular flow passage B11, the medium in the annular flow passage B11 needs to travel to a position of the hole C15 after a stroke, and then flows into the passage 7 from the hole C15, thereby increasing the stroke distance of the medium in the throttle member 6, thereby being effective. The pressure and flow rate of the medium are reduced to achieve the purpose of balancing and stably regulating the flow of the medium.

It should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and that the present invention is only described in the foregoing description and the description of the present invention, without departing from the spirit and scope of the invention. Various changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and their equivalents.

Claims

A new anti-scour control valve, the regulating valve comprising a valve body having a valve cover for use at an upper end of the valve body, the valve body having a passage for a medium circulation and a valve stem movable a cavity, the valve stem extends from the top to the bottom of the valve cover into the cavity of the valve body, a valve core is connected to the lower end of the valve stem, and a valve body is arranged below the valve core. a valve seat, and the valve core cooperates with the valve seat to form a sealing pair, and a throttle element is disposed on the outer circumference of the valve core at the upper end of the valve seat, and is characterized in that:

The throttling element is formed by stacking a plurality of orifice plate assemblies arranged on the outer circumference of the valve core from bottom to top;

The orifice plate assembly comprises an orifice plate body, the orifice plate body has an annular shape, and an annular groove is arranged at a lower end of the orifice plate body, and the annular groove is divided by a partition plate into two sets of coaxially distributed annular flow. The passage, from the inside to the outside, is an annular flow passage A and an annular flow passage B. The inner wall of the orifice main body is provided with a hole A communicating with the annular flow passage A, and the annular passage A and the annular passage are opened on the partition. The hole B of the flow path B has a hole C communicating with the annular flow path B on the outer wall of the orifice body, and the holes A, B and C are alternately distributed.
The novel anti-scour regulating valve according to claim 1, wherein the holes A, B and C are uniformly distributed in the circumferential direction.