Tower type low-noise valve seat cam deflection valve

Abstract

The invention relates to the technical field of process industry automation, in particular to a tower type low-noise valve seat cam bending valve which comprises a valve body. A valve core; a valve seat; an inner cavity of the valve seat is provided with at least three layers of arched spherical noise reduction pore plate groups connected with the spherical surface; a column body is arranged in the center of the spherical surface in the direction facing the medium inlet end, and the end, not connected with the spherical surface, of the column body penetrates through the arched spherical noise reduction pore plates and is connected with the center of the arched spherical noise reduction pore plate on the outermost layer; arc-shaped interval channels are formed between the arch-shaped spherical noise reduction pore plates and the inner wall of the valve seat, between every two adjacent arch-shaped spherical noise reduction pore plates and between the arch-shaped spherical noise reduction pore plates and the column body, and four annular through grooves are symmetrically formed in the positions, corresponding to the interval channels, of the spherical surface. And the annular parallel noise reduction pore plate group is arranged in an interval channel between the arched spherical noise reduction pore plate and the inner wall of the valve seat and is fixedly connected with the valve seat.

Description

Technical Field

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

[0002] When the fluid medium is multiphase flow (solid-liquid, gas-liquid, gas-solid) and high pressure difference, the high-speed fluid containing solid particles passing through the control valve will cause serious scouring, wear and other damage to the control valve parts at the throttle port, valve cavity, etc., shortening the service life of the valve parts or even causing failure. At the same time, it will generate large noise, vibration, internal leakage, external leakage, etc., seriously affecting the reliability, safety and environmental protection of the device operation.

[0003] The existing cam flexure valve is a low-noise eccentric structure control valve. Figure 5-6 As shown in the figure, most low-noise valve seats adopt a parallel porous structure, which reduces the flow area and the valve flow capacity, and cannot meet the large flow requirements of the customer's on-site process flow in many working conditions; in addition, when the medium contains solid particles, the parallel porous valve seat is very easy to be blocked, causing the valve flow to drop sharply, seriously affecting the normal operation of the on-site process flow, and causing great economic losses to customers. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and provide a tower type low noise valve seat cam deflection valve, comprising: The valve body comprises a valve cavity penetrating the left and right ends, an actuator is arranged on the top of the valve body, and a tail of a valve stem connected to the actuator passes through the valve body and is placed in the valve cavity; The valve core comprises a fixing portion sleeved on the periphery of the valve stem and a sealing portion connected to the fixing portion, wherein one end of the sealing portion away from the fixing portion is a spherical crown surface; The valve seat is arranged at the medium inlet end of the valve cavity and is fixedly connected to the valve body by applying pressure with a pressure plate; the end of the valve seat close to 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 orifice plates connected to the spherical surface; a column is provided in the center of the spherical surface toward the medium inlet end, and the end of the column not connected to the spherical surface penetrates through the layers of the arched spherical noise reduction orifice plates and is connected to the center of the outermost arched spherical noise reduction orifice plate; an arc-shaped spacing channel is formed 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, and four annular through grooves are symmetrically provided on the spherical surface at positions corresponding to each of the spacing channels; The annular parallel noise reduction orifice plate group is arranged in the spacing 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.

[0005] Furthermore, in the triangular area formed between the outermost arched spherical noise reduction orifice plate and the inner wall of the valve seat, the annular parallel noise reduction orifice plate group is arranged in the triangular area.

[0006] Furthermore, the annular parallel noise reduction orifice plate group includes at least three layers of annular parallel noise reduction orifice plates, and the heights of the annular parallel noise reduction orifice plates in the annular parallel noise reduction orifice plate group decrease step by step along the pressure plate toward the valve core.

[0007] Furthermore, 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 kept consistent.

[0008] Furthermore, the spherical crown surface of the valve core matches the spherical surface of the valve seat.

[0009] Furthermore, the valve core is connected to the valve stem via a flat key.

[0010] Furthermore, the actuator is one of pneumatic, electric and manual.

[0011] Furthermore, the pressure plate is fixedly connected to the valve body by bolts.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The arched spherical style design of the arched spherical noise reduction orifice plate of the tower-type low-noise valve seat cam flexure valve of the present invention can maximize its surface area, so as to arrange more noise reduction holes, obtain a larger flow area, and improve the flow capacity of the control valve.

[0013] 2. The tower-type low-noise valve seat cam flexure valve of the present invention is provided with multi-layer arched spherical noise reduction orifice plates to achieve multi-stage step-by-step pressure reduction and noise reduction, reduce flow rate, and greatly improve the noise reduction and anti-scour 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 group, improving the pressure resistance and avoiding deformation.

[0014] 3. A tower-type low-noise valve seat cam flexure valve of the present invention is provided with three (or more) layers of annular parallel noise reduction orifice plates in the triangular area formed between the outermost arched spherical noise reduction orifice plate and the inner wall of the valve seat, so as to perform multi-stage pressure reduction and noise reduction on the high-pressure fluid flowing through the area. 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 kept consistent and is equivalent to the width of the annular groove of the spherical surface, so as to maintain an appropriate flow space.

[0015] 4. In a tower-type low-noise valve seat cam flexure valve of the present invention, arc-shaped spacing channels are formed 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 that solid particles accumulated on the outside of the arched spherical noise reduction orifice plate will be discharged into the valve cavity through the arc-shaped spacing channels under the scouring action of the fluid, and the arched streamlined structure is more conducive to the smooth discharge of fluid and particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those skilled in the art. The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 A structural diagram of a tower-type low-noise valve seat cam flexure valve of the present invention (closed state); Figure 2 A structural diagram of a tower-type low-noise valve seat cam flexure valve of the present invention (open state); Figure 3 It is a partial enlarged view of the structure of a tower type low noise valve seat cam deflection valve of the present invention; Figure 4 A valve seat structure diagram of a tower type low noise valve seat cam deflection valve of the present invention; Figure 5 The structure diagram of the existing cam flex valve (closed state); Figure 6 This is a structural diagram of an existing cam flex valve (open state).

[0017] Reference numerals 1: Valve body; 2: Valve core; 21: spherical crown surface; 3: Valve seat; 31: spherical surface; 32: arched spherical noise reduction orifice plate group; 33: annular parallel noise reduction orifice plate group; 34: column; 35: interval channel; 36: annular through groove; 4: Pressing plate; 5: Flat key. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0020] See also Figure 1-6 The technical solution of a tower type low noise valve seat cam flexure valve provided in this embodiment includes the following: The design structure of the present invention is to optimize the valve seat 3 based on the existing cam flexure valve, as shown in the attached figure. Figure 5-6 As shown, the existing cam flexure valve mainly includes a pressure ring, a valve seat 3, a valve body 1, a valve core 2, a valve stem, a flat key 5, and a guide part and a packing sealing part. The pressure ring is used to tighten the valve seat 3. The right port of the valve seat 3 has a conical surface and forms a sealing pair with the spherical crown surface 21 of the valve core 2 to realize the closing of the control valve; the left port of the valve seat 3 is a solid, with multiple small through holes distributed 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 degrees, counterclockwise to open, clockwise to close) through the valve stem and the flat 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 porous structure. Due to space limitations, 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 of the control valve; 2) The valve seat 3 adopts a porous structure. Since the parallel pore diameters are small and the pore depths are long, larger particles in the medium are easily accumulated at the inlet of the valve seat 3, and smaller particles are easily stuck inside the small holes, causing the flow area of ​​the valve seat 3 to decrease sharply, further reducing the valve flow and even causing the control valve to fail.

[0021] Therefore, the present invention solves the problems in the prior art by providing at least three layers of arched spherical noise reduction orifice plates 32 (such as the attached Figure 1As shown, this figure only shows three layers of arched spherical noise reduction orifice plates, which are 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 from left to right); a column 34 is provided in the center of the spherical surface 31 toward the medium inlet end, and the end of the column 34 that is not connected to the spherical surface 31 penetrates the layers of the arched spherical noise reduction orifice plates and is connected to the center of the outermost arched spherical noise reduction orifice plate; a first spacing channel is formed between the arched spherical noise reduction orifice plate and the inner wall of the valve seat 3, a second spacing channel and a third spacing channel are formed from left to right between every two adjacent arched spherical noise reduction orifice plates, and an arc-shaped fourth spacing channel is formed between the arched spherical noise reduction orifice plate and the column 34, and four annular through grooves 36 are symmetrically opened at positions corresponding to each of the spacing channels 35 on the spherical surface 31, as shown in the attached Figure 2 As shown in (a), the annular grooves 36 are distributed in an annular shape, and the size of a single annular groove 36 is smaller than 1 / 4 of the size of the corresponding spacing channel 35; There is also an annular parallel noise reduction orifice plate group 33, which is arranged in the spacing channel 35 between the arched spherical noise reduction orifice plate and the inner wall of the valve seat 3 and is fixedly connected to the valve seat 3. The annular parallel noise reduction orifice plate group 33 is arranged in the triangular area formed between the outermost arched spherical noise reduction orifice plate and the inner wall of the valve seat 3.

[0022] Specifically, the annular parallel noise reduction orifice plate group 33 includes at least three layers of annular parallel noise reduction orifice plates, and the heights of the annular parallel noise reduction orifice plates in the annular parallel noise reduction orifice plate group 33 decrease step by step along the pressure plate 4 toward the valve core 2 .

[0023] Specifically, the inner wall ( Figure 3 The distance from the top surface of the middle annular parallel noise reduction orifice plate group 33) to the outer wall of the outermost arched spherical noise reduction orifice plate (the first arched spherical noise reduction orifice plate) remains consistent.

[0024] Preferably, all the above annular parallel noise reduction orifice plates and arched spherical noise reduction orifice plates are provided with a plurality of small holes on their surfaces to the greatest extent possible.

[0025] Specifically, the spherical crown surface 21 of the valve core 2 matches the spherical surface 31 of the valve seat 3 .

[0026] Specifically, the valve core 2 is connected to the valve stem via a flat key 5 .

[0027] Specifically, the actuator is one of pneumatic, electric and manual.

[0028] Specifically, the pressure plate 4 is fixedly connected to the valve body 1 by bolts.

[0029] In summary, the present invention overcomes the shortcomings of the existing cam flexure valve, including: 1) Adopt multiple layers of different combinations of arched spherical noise reduction orifice plates to reduce pressure step by step, which has better pressure reduction and noise reduction effects, low flow rate, low noise, more wear-resistant and erosion-resistant valve parts, and long service life; 2) The use of arched spherical noise reduction orifice plate has a large surface area, which can significantly increase the number of noise reduction holes, increase the flow area of ​​the valve seat 3, increase the flow rate, and improve the flow capacity of the control valve; 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.

[0030] Finally, it should be noted that the above are only 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 aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in 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 comprises a valve cavity penetrating the left and right ends, an actuator is arranged on the top of the valve body, and a tail of a valve stem connected to the actuator passes through the valve body and is placed in the valve cavity; The valve core comprises a fixing portion sleeved on the periphery of the valve stem and a sealing portion connected to the fixing portion, wherein one end of the sealing portion away from the fixing portion is a spherical crown surface; The valve seat is arranged at the medium inlet end of the valve cavity and is fixedly connected to the valve body by applying pressure with a pressure plate; the end of the valve seat close to 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 orifice plates connected to the spherical surface; a column is provided in the center of the spherical surface toward the medium inlet end, and the end of the column not connected to the spherical surface penetrates through the layers of the arched spherical noise reduction orifice plates and is connected to the center of the outermost arched spherical noise reduction orifice plate; an arc-shaped spacing channel is formed 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, and four annular through grooves are symmetrically provided on the spherical surface at positions corresponding to each of the spacing channels; The annular parallel noise reduction orifice plate group is arranged in the spacing 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 triangular area is formed between the outermost arched spherical noise reduction orifice plate and the inner wall of the valve seat, and the annular parallel noise reduction orifice plate group is arranged in the triangular area.

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 group includes at least three layers of annular parallel noise reduction orifice plates, and the heights of the annular parallel noise reduction orifice plates in the annular parallel noise reduction orifice plate group decrease step by step along the pressure plate toward 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 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.

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 is connected to the valve stem via 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 and 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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