Noise reduction and turbulence prevention combined valve seat

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a noise reduction and turbulence prevention combined valve seat which comprises a soft valve seat body and a rigid valve seat support which is arranged outside the valve seat body in a sleeved mode and used for fixing the valve seat body. One end of the valve seat body is a cylinder opening, the other end of the valve seat body is a cylinder bottom attached to the valve seat body, a cylinder wall is formed between the cylinder opening and the cylinder bottom, a plurality of noise reduction holes penetrating through the cylinder wall in the radial direction are formed in the cylinder wall, and a circulation cavity allowing fluid to pass through is defined between the cylinder wall and the valve seat body; soft sealing is formed between the valve seat body made of soft materials and the valve element, the sealing reliability is improved, meanwhile, the overall strength of the combined valve seat is improved through the rigid valve seat support, in addition, the noise reduction holes formed in the valve seat support have the effects of reducing fluid noise and preventing turbulent flow, and the noise reduction effect is good. The phenomena of crawling, surging and the like of the valve are avoided, and the service life of the axial flow type regulating valve is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a noise-reducing and turbulence-preventing combined valve seat. Background Art

[0002] Axial flow regulating valves are used to circulate or block fluids and regulate and control fluid flow rates. The movement direction of their valve cores and the fluid flow direction are both coaxial with the pipeline axis, and they have good dynamic stability performance and pressure-bearing capacity, so they are widely used in the industry. However, in the prior art, when the valve is fully opened, that is, when the medium flow rate is the largest, the noise generated by the medium flow is very large, and the large-flow-rate fluid will generate turbulence during the flow process, resulting in phenomena such as valve crawling and surging, greatly reducing the service life of the valve. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is: to solve the problem that when the valve in the prior art is fully opened, the noise generated by the medium flow is very large, and the large-flow-rate fluid will generate turbulence during the flow process, resulting in phenomena such as valve crawling and surging, greatly reducing the service life of the valve. Now, a noise-reducing and turbulence-preventing combined valve seat is provided.

[0004] The technical solution adopted by the utility model to solve its technical problem is: a noise-reducing and turbulence-preventing combined valve seat, which is fixed in the valve cavity of the valve body and is used to cooperate with the valve core to connect or block the liquid inlet channel and the liquid outlet channel to realize the opening or closing of the valve. The combined valve seat includes a soft valve seat body and a rigid valve seat bracket sleeved outside the valve seat body and used to fix the valve seat body. The valve seat bracket is of a cylindrical structure, one end of which in the axial direction is a cylindrical opening arranged in an open shape, and the other end is a cylindrical bottom attached to the valve seat body. A cylindrical wall is formed between the cylindrical opening and the cylindrical bottom. A plurality of noise-reducing holes penetrating it in the radial direction are opened on the cylindrical wall, and a flow cavity for connecting the liquid inlet channel and the liquid outlet channel is formed by enclosing between the cylindrical wall and the valve seat body.

[0005] Further, a plug-in portion is formed on the valve seat body protruding towards the cylindrical bottom of the valve seat bracket, and a plug-in hole for the plug-in portion to insert is opened on the cylindrical bottom of the valve seat bracket.

[0006] Further, an inner ring groove and an outer ring groove are respectively opened on both sides of the plug-in hole in its axial direction. An inner seal for sealing the valve seat body and the valve seat bracket is installed inside the inner ring groove, and an outer seal for sealing the valve seat bracket and the valve body is installed inside the outer ring groove.

[0007] Further, one end of the valve seat body away from the bottom of the cylinder is a sealing end for cooperating with the valve core. The sealing end includes a first plane located at the central part of the valve seat body, a second plane located at the outer edge part, and a sealing conical surface for connecting the first plane and the second plane. The sealing conical surface gradually inclines towards the direction close to the bottom of the cylinder from the first plane to the second plane.

[0008] Further, the combined valve seat and the valve body are fixed by bolts, and the valve seat body is provided with a connection hole for cooperating with the screw rod of the bolt and a counterbore for accommodating the nut.

[0009] Further, a plurality of groups of noise reduction holes are arranged along the axial direction of the valve seat bracket. A plurality of noise reduction holes in each group are distributed at intervals along the circumferential direction of the valve seat bracket, and adjacent two groups of noise reduction holes are staggered.

[0010] Further, the distance between the second plane and the bottom of the cylinder is H1, and the distance between the noise reduction hole closest to the bottom of the cylinder and the bottom of the cylinder is H2, and H1 < H2.

[0011] Further, the material of the valve seat body is nylon.

[0012] The beneficial effects of the present utility model are as follows: The present utility model forms a soft seal between the valve seat body made of a soft material and the valve core, improving the reliability of the seal. At the same time, a rigid valve seat bracket is used to improve the overall strength of the combined valve seat. In addition, a plurality of noise reduction holes opened on the valve seat bracket play a role in reducing fluid noise and preventing the generation of turbulent flow, enabling the valve to avoid phenomena such as crawling and surging, and effectively improving the working life of the axial flow regulating valve.

[0013] Other features and advantages of the present application will become clear through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0015] Figure 1 is a schematic structural view of the present utility model;

[0016] Figure 2 is a schematic structural view of the valve seat body;

[0017] Figure 3 is a schematic structural view of the valve seat bracket;

[0018] In the figure:

[0019] 1. Valve body; 2. Valve seat body; 201. Insertion part; 202. First plane; 203. Second plane; 204. Sealing cone surface; 205. Counterbore; 3. Valve seat bracket; 301. Cylinder opening; 302. Cylinder bottom; 303. Cylinder wall; 3031. Noise reduction hole; 304. Insertion hole; 305. Inner ring groove; 306. Outer ring groove; 307. Flow cavity; 4. Inner seal; 5. Outer seal; 6. Bolt;

[0020] H1. Distance between the second plane and the cylinder bottom;

[0021] H2. Distance between the noise reduction hole closest to the cylinder bottom and the cylinder bottom. Detailed implementation mode

[0022] Now, the present utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only schematically showing the basic structure of the present utility model. Therefore, they only show the components related to the present utility model. Directions and references (such as up, down, left, right, etc.) can only be used to assist in describing the features in the drawings. Therefore, the following specific implementation modes are not adopted in a restrictive sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalent forms.

[0023] As Figures 1-3 shown, a noise reduction and anti-turbulence combined valve seat is fixed in the valve cavity of the valve body 1 and is used to cooperate with the valve core to connect or block the liquid inlet channel and the liquid outlet channel to realize the opening or closing of the valve. Its characteristics are: the combined valve seat includes a soft valve seat body 2 and a rigid valve seat bracket 3 sleeved outside the valve seat body 2 and used to fix the valve seat body 2; a soft seal is formed between the valve seat body 2 made of soft material and the valve core, improving the reliability of the seal, and the rigid valve seat bracket 3 overcomes the defect of insufficient strength of the valve seat body 2 and supports it, thereby improving the overall strength of the combined valve seat.

[0024] The valve seat support 3 is of a cylindrical structure. One end of it in the axial direction is provided with an open cylindrical opening 301, and the other end is a cylindrical bottom 302 that fits with the valve seat body 2. A cylindrical wall 303 is formed between the cylindrical opening 301 and the cylindrical bottom 302. The thickness of the cylindrical bottom 302 is greater than that of the cylindrical wall 303 to provide sufficient support for the valve seat body 2. A plurality of noise reduction holes 3031 penetrating it radially are provided on the cylindrical wall 303. The axial extension length of the cylindrical wall 303 is greater than the axial extension length of the valve seat body 2. A flow cavity 307 for communicating the liquid inlet channel and the liquid outlet channel is formed by enclosing between the cylindrical wall 303 and the valve seat body 2. When the valve is opened, the fluid enters the flow cavity 307 from the liquid inlet channel, and then enters the liquid outlet channel through the noise reduction holes 3031. The noise reduction holes 3031 can shunt the fluid, thereby playing a role in reducing the fluid noise and preventing the generation of turbulence, enabling the valve to avoid phenomena such as crawling and surging, and effectively improving the working life of the axial flow regulating valve.

[0025] In some examples, a plug-in portion 201 protrudes from the valve seat body 2 towards the cylindrical bottom 302 of the valve seat support 3. The cylindrical bottom 302 of the valve seat support 3 is provided with a plug-in hole 304 for the plug-in portion 201 to insert. When the combined valve body 1 is installed, first insert the plug-in portion 201 into the plug-in hole 304 to achieve the preliminary positioning of the two, so as to facilitate their subsequent fixation.

[0026] In some examples, inner ring grooves 305 and outer ring grooves 306 are respectively provided on both sides of the plug-in hole 304 along its axial direction. An inner seal 4 for sealing the valve seat body 2 and the valve seat support 3 is installed inside the inner ring groove 305, and an outer seal 5 for sealing the valve seat support 3 and the valve body 1 is installed inside the outer ring groove 306. Both the inner seal 4 and the outer seal 5 are O-ring seals, and the two form a double seal.

[0027] In some examples, one end of the valve seat body 2 away from the cylindrical bottom 302 is a sealing end for cooperating with the valve core. The sealing end includes a first plane 202 at the central part of the valve seat body 2, a second plane 203 at the outer edge part, and a sealing conical surface 204 for connecting the first plane 202 and the second plane 203. There are arc transitions between the first plane 202 and the sealing conical surface 204, and between the second plane 203 and the sealing conical surface 204. The sealing conical surface 204 gradually inclines towards the direction close to the cylindrical bottom 302 from the first plane 202 to the second plane 203, and its cone angle is 120°±2°. The sealing conical surface 204 can effectively contact the valve core valve line. Because this material is easy to deform, under the external force of the actuator, a sealing specific pressure is generated to achieve the effective sealing of the valve core and the combined valve seat.

[0028] In some examples, the combined valve seat and the valve body 1 are fixed by bolts 6. The valve seat body 2 is provided with a valve seat connection hole that matches the screw rod of the bolt 6 and a counterbore 205 for accommodating the nut. The screw rod passes through the valve seat connection hole and the valve body connection hole in sequence to fix the two, and the nut is located inside the counterbore 205.

[0029] In some examples, multiple groups of the noise reduction holes 3031 are axially arranged along the valve seat bracket 3. A plurality of the noise reduction holes 3031 in each group are circumferentially spaced apart along the valve seat bracket 3, and the adjacent two groups of the noise reduction holes 3031 are staggered, so as to increase the number of the noise reduction holes 3031 and further improve the noise reduction and anti-turbulence effects.

[0030] In some examples, the distance between the second plane 203 and the bottom 302 of the cylinder is H1, and the distance between the noise reduction hole 3031 closest to the bottom 302 of the cylinder and the bottom 302 of the cylinder is H2, where H1 < H2, that is, the noise reduction holes 3031 are opened at positions not blocked by the valve seat body 2, and all the noise reduction holes 3031 can allow the fluid to flow through.

[0031] In some examples, the valve seat body 2 is made of nylon with the specification of NL66. The valve seat body 2 made of nylon has a certain deformation ability and can form a soft seal with the valve core.

[0032] Working principle:

[0033] During installation, first install the inner seal 4 and the outer seal 5 in the insertion hole 304 of the valve seat bracket 3, then insert the insertion part 201 of the valve seat body 2 into the insertion hole 304 of the valve seat bracket 3 to form a combined valve seat, and finally install the combined valve seat into the valve body 1 and screw in the bolt 6 to fix the combined valve seat and the valve body 1. The inner seal 4 seals the valve seat body 2 and the valve seat bracket 3, and the outer seal 5 seals the valve seat bracket 3 and the valve body 1.

[0034] Based on the ideal embodiments of the present invention as inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A noise reduction and turbulence prevention combined valve seat, which is fixed in the valve cavity of the valve body (1) and is used to cooperate with the valve core to connect or block the inlet flow channel and the outlet flow channel to realize the opening or closing of the valve, characterized in that: The combined valve seat comprises a soft valve seat body (2) and a rigid valve seat bracket (3) which is sleeved on the outside of the valve seat body (2) and used to fix the valve seat body (2); the valve seat bracket (3) is a cylindrical structure, one end of which along the axial direction is a cylinder mouth (301) arranged in an open shape, and the other end is a cylinder bottom (302) which is in contact with the valve seat body (2); a cylinder wall (303) is formed between the cylinder mouth (301) and the cylinder bottom (302); a plurality of noise reduction holes (3031) are provided on the cylinder wall (303) which penetrate the cylinder in the radial direction, and a flow cavity (307) for connecting a liquid inlet flow channel and a liquid outlet flow channel is formed between the cylinder wall (303) and the valve seat body (2).

2. The noise reduction and turbulence prevention combined valve seat according to claim 1, characterized in that: The valve seat body (2) protrudes toward the bottom (302) of the valve seat support (3) to form a plug-in portion (201), and the bottom (302) of the valve seat support (3) is provided with a plug-in hole (304) for inserting the plug-in portion (201).

3. The noise reduction and turbulence prevention combined valve seat according to claim 2, characterized in that: The plug-in hole (304) is provided with an inner ring groove (305) and an outer ring groove (306) on both sides along its axial direction, and an inner sealing member (4) for sealing the valve seat body (2) and the valve seat support (3) is installed inside the inner ring groove (305), and an outer sealing member (5) for sealing the valve seat support (3) and the valve body (1) is installed inside the outer ring groove (306).

4. The noise reduction and turbulence prevention combined valve seat according to claim 1, characterized in that: The end of the valve seat body (2) away from the bottom of the cylinder (302) is a sealing end that cooperates with the valve core, and the sealing end includes a first plane (202) located at the center of the valve seat body (2), a second plane (203) located at the outer edge, and a sealing cone surface (204) for connecting the first plane (202) and the second plane (203), and the sealing cone surface (204) is gradually inclined from the first plane (202) to the second plane (203) and toward the bottom of the cylinder (302).

5. The noise reduction and turbulence prevention combined valve seat according to claim 1, characterized in that: The combined valve seat and the valve body (1) are fixed by bolts (6), and the valve seat body (2) is provided with a connection hole matched with the screw rod of the bolt (6) and a countersunk hole (205) for accommodating a nut.

6. The noise reduction and turbulence prevention combined valve seat according to claim 1, characterized in that: The noise reduction holes (3031) are arranged in multiple groups along the axial direction of the valve seat support (3), and a plurality of noise reduction holes (3031) in each group are distributed at intervals along the circumference of the valve seat support (3), and two adjacent groups of noise reduction holes (3031) are distributed in a staggered manner.

7. The noise reduction and turbulence prevention combined valve seat according to claim 4, characterized in that: The distance between the second plane (203) and the cylinder bottom (302) is H1, and the distance between the noise reduction hole (3031) closest to the cylinder bottom (302) and the cylinder bottom (302) is H2, H1<H2.

8. The noise reduction and turbulence prevention combined valve seat according to claim 1, characterized in that: The valve seat body (2) is made of nylon.

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