Tower low noise valve seat cam flex valve

Abstract

The present application relates to the technical fields of process industry automation, and especially relates to a tower type low noise valve seat cam flexure valve, which comprises a valve body, a valve core and a valve seat, an inner cavity of the valve seat is provided with at least three layers of arched spherical noise reduction hole plate groups which are connected with the spherical surface, a cylinder is arranged at the center of the spherical surface and faces the medium inlet end, one end of the cylinder which is not connected with the spherical surface penetrates through the arched spherical noise reduction hole plates layer by layer and is connected with the center of the outermost arched spherical noise reduction hole plate, an arc-shaped interval channel is formed between the arched spherical noise reduction hole plate and the inner wall of the valve seat, between every two adjacent arched spherical noise reduction hole plates and between the arched spherical noise reduction hole plate and the cylinder, four annular through grooves are symmetrically arranged on the spherical surface and correspond to the interval channels, and an annular parallel noise reduction hole plate group is arranged in the interval channel between the arched spherical noise reduction hole plate and the inner wall of the valve seat and is fixedly connected with the valve seat.

Description

Technical Field

[0001] This invention relates to the field of process industry automation technology, and in particular to a tower-type low-noise valve seat cam flexure valve. Background Technology

[0002] In multiphase flow (solid-liquid, gas-liquid, gas-solid) and high pressure differential conditions, the high-speed fluid containing solid particles passing through the control valve will cause severe erosion and wear damage to the control valve parts in the throttling orifice and valve cavity, shortening the service life of the valve parts or even causing failure. At the same time, it will generate large noise, vibration, internal leakage and external leakage, which will seriously affect the reliability, safety and environmental protection of the equipment operation.

[0003] The existing cam-flex valve is a low-noise eccentric control valve, as shown in the attached... Figure 5-6 As shown, most low-noise valve seats adopt a parallel multi-hole structure, which reduces the flow area and valve flow capacity. In many operating conditions, it cannot meet the high flow requirements of the customer's on-site process. In addition, when the medium contains solid particles, the parallel multi-hole valve seat is very prone to blockage, causing the valve flow to drop sharply, which seriously affects the normal operation of the on-site process and causes significant economic losses to the customer. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a tower-type low-noise valve seat cam flexure valve, comprising:

[0005] The valve body includes valve cavities that extend through the left and right ends. An actuator is provided at the top of the valve body, and the tail of the valve stem connected to the actuator passes through the valve body and is placed in the valve cavity.

[0006] The valve core includes a fixing part sleeved around the valve stem and a sealing part connected to the fixing part, wherein the end of the sealing part away from the fixing part is a spherical crown surface;

[0007] A valve seat is disposed at the medium inlet end of the valve cavity and is fixedly connected to the valve body by pressure applied by a pressure plate; the end of the valve seat near the valve core is a spherical surface; the inner cavity of the valve seat is provided with at least three layers of arched spherical noise reduction perforated plates that are in contact with the spherical surface; a column is provided at the center of the spherical surface facing the medium inlet end, and the end of the column that is not in contact with the spherical surface penetrates through the layers of arched spherical noise reduction perforated plates and is in contact with the center of the outermost arched spherical noise reduction perforated plate; an arc-shaped interval channel is formed between the arched spherical noise reduction perforated plates and the inner wall of the valve seat, between every two adjacent arched spherical noise reduction perforated plates, and between the arched spherical noise reduction perforated plates and the column; four annular through grooves are symmetrically opened on the spherical surface corresponding to each interval channel;

[0008] An annular parallel noise reduction orifice plate assembly is disposed in the spacer channel between the arched spherical noise reduction orifice plate and the inner wall of the valve seat and is fixedly connected to the valve seat.

[0009] Furthermore, the annular parallel noise reduction orifice plate group is configured in the triangular region formed between the outermost arched spherical noise reduction orifice plate and the inner wall of the valve seat.

[0010] Furthermore, the annular parallel noise reduction orifice plate assembly includes at least three layers of annular parallel noise reduction orifice plates, and the height of the annular parallel noise reduction orifice plates in the annular parallel noise reduction orifice plate assembly decreases step by step along the pressure plate towards the valve core.

[0011] Furthermore, the distance from the inner wall of each annular parallel noise reduction perforated plate in the annular parallel noise reduction perforated plate group to the outer wall of the outermost arched spherical noise reduction perforated plate remains consistent.

[0012] Furthermore, the spherical crown surface of the valve core matches the spherical surface of the valve seat.

[0013] Furthermore, the valve core and the valve stem are connected by a flat key.

[0014] Furthermore, the actuator is one of pneumatic, electric, or manual.

[0015] Furthermore, the pressure plate is fixedly connected to the valve body by bolts.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The arched spherical noise reduction orifice plate of the tower-type low-noise valve seat cam flexure valve of the present invention has an arched spherical design that can maximize its surface area so as to lay out more noise reduction orifices, obtain a larger flow area, and improve the flow capacity of the control valve.

[0018] 2. The tower-type low-noise valve seat cam flexure valve of the present invention features a multi-layered arched spherical noise reduction orifice plate, which can achieve multi-stage pressure reduction and noise reduction, reduce flow velocity, and greatly improve the noise reduction and anti-erosion performance of the control valve; the spherical surface on the right side of the valve seat and the column in the center are conducive to supporting and reinforcing the entire arched spherical noise reduction orifice plate assembly, improving pressure resistance and avoiding deformation.

[0019] 3. In this invention, a tower-type low-noise valve seat cam flexure valve has three (or more) layers of annular parallel noise reduction orifice plates arranged in the triangular region formed between the outermost arched spherical noise reduction orifice plate and the inner wall of the valve seat. The purpose is to perform multi-stage pressure reduction and noise reduction on the high-pressure fluid flowing through this region. The distance from the inner wall of each annular parallel noise reduction orifice plate in the annular parallel noise reduction orifice plate group to the outer wall of the outermost arched spherical noise reduction orifice plate is consistent and is equivalent to the width of the annular groove of the spherical surface, so as to maintain an appropriate flow space.

[0020] 4. The present invention discloses an arched spherical noise reduction orifice plate forming an arc-shaped interval channel between the arched spherical noise reduction orifice plate and the inner wall of the valve seat, between every two adjacent arched spherical noise reduction orifice plates, and between the arched spherical noise reduction orifice plate and the column. The purpose is to ensure that solid particles accumulated outside the arched spherical noise reduction orifice plate are discharged into the valve cavity through the arc-shaped interval channel under the flushing action of the fluid, and the streamlined arched structure is more conducive to the smooth discharge of fluid and particles. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a structural diagram (closed state) of a tower-type low-noise valve seat cam flexure valve according to the present invention.

[0023] Figure 2 This is a structural diagram (open state) of a tower-type low-noise valve seat cam flexure valve according to the present invention.

[0024] Figure 3 This is a partially enlarged view of the structure of a tower-type low-noise valve seat cam flexure valve according to the present invention;

[0025] Figure 4 This is a diagram of the valve seat structure of a tower-type low-noise valve seat cam flexure valve according to the present invention;

[0026] Figure 5 Here is a structural diagram of an existing cam-flex valve (closed state).

[0027] Figure 6 This is a structural diagram of an existing cam-driven flexure valve (open state).

[0028] Figure Labels

[0029] 1: Valve body;

[0030] 2: Valve core;

[0031] 21: Crown surface;

[0032] 3: Valve seat;

[0033] 31: Spherical surface; 32: Arched spherical noise reduction perforated plate assembly; 33: Annular parallel noise reduction perforated plate assembly; 34: Column; 35: Spacer channel; 36: Annular through groove;

[0034] 4: Pressure plate;

[0035] 5: Flat key. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0037] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one".

[0038] Please see Figure 1-6 The technical solution of the tower-type low-noise valve seat cam flexure valve provided in this embodiment includes the following:

[0039] The design structure of this invention optimizes the valve seat 3 based on the existing cam-flexible valve, as shown in the attached figure. Figure 5-6 As shown, the existing cam-driven flexure valve mainly consists of a pressure ring, valve seat 3, valve body 1, valve core 2, valve stem, key 5, guide section, and packing seal section. The pressure ring is used to fasten the valve seat 3. The right port of the valve seat 3 has a conical surface that forms a sealing pair with the spherical crown surface 21 of the valve core 2, realizing the closure of the control valve. The left port of the valve seat 3 is solid, with multiple small through holes arranged along the center direction. The top interface is equipped with an actuator (pneumatic or electric), which receives the control signal given by the control system and drives the valve core 2 to rotate (60-degree angle, counterclockwise to open, clockwise to close) through the valve stem and key 5. The medium enters from the left port of the valve seat 3, is diverted through the valve core 2, and finally flows out from the right side of the valve body 1. The above control valve structure has the following disadvantages: 1) The valve seat 3 adopts a parallel multi-hole structure. Due to space constraints, the solid part occupies a large proportion of the total area of ​​the annular channel of the valve seat 3, which greatly reduces the flow area of ​​the valve seat 3 and reduces the flow rate of the control valve; 2) The valve seat 3 adopts a multi-hole structure. Due to the small parallel orifice diameter and long orifice depth, larger particles in the medium are easy to accumulate at the inlet of the valve seat 3, and smaller particles are easy to get stuck inside the small orifice, which causes the flow area of ​​the valve seat 3 to decrease sharply, further reducing the valve flow rate and even causing the control valve to fail.

[0040] Therefore, to address the problems in the prior art, the present invention provides at least three layers of arched spherical noise reduction orifice plate assemblies 32 that are in contact with the spherical surface 31 within the inner cavity of the valve seat 3 (as shown in the attached diagram). Figure 1As shown in the attached figure, only three layers of arched spherical noise reduction orifice plates are displayed, from left to right: the first arched spherical noise reduction orifice plate, the second arched spherical noise reduction orifice plate, and the third arched spherical noise reduction orifice plate. A column 34 is provided at the center of the spherical surface 31 facing the medium inlet end. One end of the column 34, not connected to the spherical surface 31, penetrates through each layer of the arched spherical noise reduction orifice plates and connects to the center of the outermost arched spherical noise reduction orifice plate. A first interval channel is formed between the arched spherical noise reduction orifice plates and the inner wall of the valve seat 3. A second interval channel and a third interval channel are formed between every two adjacent arched spherical noise reduction orifice plates from left to right. An arc-shaped fourth interval channel is formed between the arched spherical noise reduction orifice plates and the column 34. Four annular grooves 36 are symmetrically opened on the spherical surface 31 corresponding to each interval channel 35, as shown in the attached figure. Figure 2 As shown in (a), the annular slots 36 are distributed in a ring shape, and the size of a single annular slot 36 is smaller than the size of 1 / 4 of the spaced channel 35 corresponding to it.

[0041] An annular parallel noise-reducing perforated plate assembly 33 is also provided. This annular parallel noise-reducing perforated plate assembly 33 is disposed in the spacer channel 35 between the arched spherical noise-reducing perforated plate and the inner wall of the valve seat 3, and is fixedly connected to the valve seat 3. The annular parallel noise-reducing perforated plate assembly 33 is disposed in the triangular region formed between the outermost arched spherical noise-reducing perforated plate and the inner wall of the valve seat 3.

[0042] Specifically, the annular parallel noise reduction perforated plate group 33 includes at least three layers of annular parallel noise reduction perforated plates, and the height of the annular parallel noise reduction perforated plates in the annular parallel noise reduction perforated plate group 33 decreases step by step along the pressure plate 4 toward the valve core 2.

[0043] Specifically, the inner wall of each annular parallel noise reduction perforated plate in the annular parallel noise reduction perforated plate group 33 ( Figure 3 The distance from the top surface of the middle annular parallel noise reduction perforated plate group 33 to the outer wall of the outermost arched spherical noise reduction perforated plate (first arched spherical noise reduction perforated plate) remains consistent.

[0044] Preferably, all the above-mentioned annular parallel noise reduction perforated plates and arched spherical noise reduction perforated plates have multiple small holes distributed on their surfaces to the maximum extent.

[0045] Specifically, the spherical crown surface 21 of the valve core 2 matches the spherical surface 31 of the valve seat 3.

[0046] Specifically, the valve core 2 and the valve stem are connected by a flat key 5.

[0047] Specifically, the actuator is one of pneumatic, electric, or manual.

[0048] Specifically, the pressure plate 4 is fixedly connected to the valve body 1 by bolts.

[0049] In summary, the present invention overcomes the shortcomings of existing cam-driven flexure valves, including:

[0050] 1) The multi-layered arched spherical noise reduction orifice plate with different combinations reduces pressure step by step, resulting in better pressure reduction and noise reduction effect, lower flow rate, less noise, more wear-resistant and erosion-resistant valve components, and longer service life.

[0051] 2) The use of an arched spherical noise reduction orifice plate with a large surface area can significantly increase the number of noise reduction orifices, increase the flow area of ​​valve seat 3, increase the flow rate, and improve the flow capacity of the control valve;

[0052] 3) A certain space (channel) is left between two adjacent arched spherical noise reduction orifice plates, which increases the flow rate and allows solid particles in the fluid to pass smoothly into the valve cavity, effectively reducing the occurrence of valve seat 3 blockage.

[0053] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tower-type low-noise valve seat cam flexure valve, characterized in that, include: The valve body includes valve cavities that extend through the left and right ends. An actuator is provided at the top of the valve body, and the tail of the valve stem connected to the actuator passes through the valve body and is placed in the valve cavity. The valve core includes a fixing part sleeved around the valve stem and a sealing part connected to the fixing part, wherein the end of the sealing part away from the fixing part is a spherical crown surface; A valve seat is disposed at the medium inlet end of the valve cavity and is fixedly connected to the valve body by pressure applied by a pressure plate; the end of the valve seat near the valve core is a spherical surface; the inner cavity of the valve seat is provided with at least three layers of arched spherical noise reduction perforated plates that are in contact with the spherical surface; a column is provided at the center of the spherical surface facing the medium inlet end, and the end of the column that is not in contact with the spherical surface passes through the layers of arched spherical noise reduction perforated plates and is in contact with the center of the outermost arched spherical noise reduction perforated plate; an arc-shaped interval channel is formed between the arched spherical noise reduction perforated plates and the inner wall of the valve seat, between every two adjacent arched spherical noise reduction perforated plates, and between the arched spherical noise reduction perforated plates and the column; four annular through grooves are symmetrically opened on the spherical surface corresponding to each interval channel; An annular parallel noise reduction orifice plate assembly is disposed in the spacer channel between the arched spherical noise reduction orifice plate and the inner wall of the valve seat and is fixedly connected to the valve seat.

2. The tower-type low-noise valve seat cam flexure valve according to claim 1, characterized in that: The outermost arched spherical noise reduction orifice plate forms a triangular region with the inner wall of the valve seat, and the annular parallel noise reduction orifice plate assembly is disposed in the triangular region.

3. The tower-type low-noise valve seat cam flexure valve according to claim 2, characterized in that: The annular parallel noise reduction orifice plate assembly includes at least three layers of annular parallel noise reduction orifice plates, and the height of the annular parallel noise reduction orifice plates in the annular parallel noise reduction orifice plate assembly decreases step by step along the pressure plate towards the valve core.

4. The tower-type low-noise valve seat cam flexure valve according to claim 3, characterized in that: The distance from the inner wall of each annular parallel noise reduction perforated plate in the annular parallel noise reduction perforated plate group to the outer wall of the outermost arched spherical noise reduction perforated plate remains consistent.

5. The tower-type low-noise valve seat cam flexure valve according to claim 1, characterized in that: The spherical crown surface of the valve core matches the spherical surface of the valve seat.

6. The tower-type low-noise valve seat cam flexure valve according to claim 1, characterized in that: The valve core and the valve stem are connected by a flat key.

7. The tower-type low-noise valve seat cam flexure valve according to claim 1, characterized in that: The actuator is one of pneumatic, electric, or manual.

8. The tower-type low-noise valve seat cam flexure valve according to claim 1, characterized in that: The pressure plate is fixedly connected to the valve body by bolts.

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