A noise reduction regulating ball valve

Abstract

The utility model discloses a noise reduction regulating ball valve, which belongs to the field of valve structure, and comprises a valve body. A throttling structure is arranged in the valve body. The throttling structure comprises a plurality of throttling plates arranged in parallel. Each of the throttling plates is provided with a plurality of throttling holes. The throttling structure can buffer a medium, thereby greatly reducing the flow velocity of the medium, thereby reducing the pressure between the medium and a cavity. The throttling structure can also divert the medium, thereby thinning the flow beam. After the flow beam becomes thinner, a gap is generated between the flow beam and the cavity wall, thereby further reducing the pressure of the medium on the cavity, and solves the problem in the prior art that, under working conditions such as high flow velocity, high pressure difference and large flow rate, high decibel noise is generated when the medium flows in the ball valve.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a noise reduction regulating ball valve. Background Art

[0002] The V-type ball valve is a ball valve with regulating and cutting functions. It is mainly used as a regulating valve, and can also be used as a switch valve. This series of regulating valves has excellent regulating performance and strong versatility. High-performance control valves include two structures: wafer type and flange type. This series of valves has an approximately equal percentage flow characteristic, a large control range and a particularly stable control process. The closing piece is a hemisphere with a V-shaped opening. The V-shaped opening has a sharp edge. During the rotation of the ball, there is a wiping effect between the closing pieces, which has a strong cutting force on the medium. The V-shaped opening of the ball and the valve seat flow channel form a fan-shaped area. The cross-sectional area of ​​the flow channel can be changed during the rotation process to form a precise adjustment of the medium. It is particularly suitable for occasions where the medium is viscous and contains fibers or particles.

[0003] In the actual working conditions, some working conditions are more severe, such as high pressure difference, large flow, and high flow rate. Under these working conditions, serious scouring and high-decibel noise will occur. In order to avoid the above situation, it is necessary to improve the structure of the conventional V-ball to meet the working conditions and extend the service life of the valve.

[0004] For example, the "new type of ultra-low temperature fixed ball valve" disclosed in the Chinese patent literature has a publication number of CN201320766319.6. The valve body and the connector are sealed by a spring energy storage ring, a valve seat support ring is provided between the ball and the connector, a sealing seat is provided between the ball and the valve seat support ring, a valve seat base and a spring are provided between the valve seat support ring and the connector, and the valve seat support ring and the connector are sealed by a spring energy storage ring. However, the disadvantage of this patent is that under harsh working conditions such as high flow rate, high pressure difference, and large flow, the medium is prone to generate high-decibel noise due to high pressure during the flow of the medium in the valve body. Utility Model Content

[0005] The utility model aims to overcome the problem in the prior art that under high flow velocity, high pressure difference, large flow and other working conditions, high decibel noise is generated when the medium flows in the ball valve, and provides a noise reduction regulating ball valve, which can reduce the noise generated by the medium in the valve body under harsh working conditions.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model discloses a noise reduction regulating ball valve, which comprises a valve body. A throttling structure is arranged in the valve body. The throttling structure comprises a plurality of throttling plates arranged in parallel. Each of the throttling plates is provided with a plurality of throttling holes.

[0008] The throttling structure in the present application can achieve noise reduction effects in two aspects. On the one hand, the throttling structure can buffer the medium, thereby greatly reducing the flow rate of the medium, thereby reducing the pressure between the medium and the cavity; on the other hand, the throttling structure can divert the medium, thereby thinning the flow beam. After the flow beam becomes thinner, a gap is generated between the flow beam and the cavity wall, thereby further reducing the pressure of the medium on the cavity. As the pressure decreases, it can not only achieve a noise reduction effect, but also achieve anti-cavitation, anti-flash evaporation, and anti-cavitation functions.

[0009] Preferably, the throttle holes on two adjacent throttle plates are staggered. The staggered throttle holes can make the medium change direction and turn when flowing between the throttle plates, thereby continuously consuming the kinetic energy of the medium and further reducing the flow rate of the medium.

[0010] Preferably, the throttle hole diameter on the throttle plate located upstream in the medium flow direction is larger than the throttle hole diameter on the throttle plate located downstream in the medium flow direction. With this structure, when the medium passes through the throttling structure, the flow beam gradually decreases in stages and the buffer surface gradually increases, thereby avoiding excessive pressure on the upstream throttle plate.

[0011] Preferably, the throttling structure comprises a first throttling plate, wherein the first throttling plate comprises a throttling surface and a mounting portion located at an outer edge of the throttling surface, and an outer side of the mounting portion is adapted to be mounted in the valve body.

[0012] Preferably, an installation step is provided on the inner side of the installation portion, and the other throttle plates of the throttling structure except the first throttle plate are adapted to be installed on the installation step.

[0013] Preferably, the inner diameters of the plurality of throttle plates except the first throttle plate increase in sequence in the direction away from the first throttle plate. This structure can facilitate the installation of the throttle plates.

[0014] Preferably, the other throttle plates except the first throttle plate are fixed to the mounting portion of the first throttle plate by welding, and the first throttle plate is fixed to the valve body by welding. This structure enables the throttling structure and the valve body to form an integral whole, thereby improving reliability.

[0015] Preferably, a valve stem, a valve core and a valve seat are further provided in the valve body, the valve stem is fixedly connected to the valve core, and the valve seat is located at the feed inlet of the valve body.

[0016] Preferably, the valve core is in the shape of a hemispherical shell, and the arc angle of its cross section is less than 180°.

[0017] Therefore, the utility model has the following beneficial effects: (1) reducing the noise generated by the medium in the valve body under severe working conditions; (2) having anti-cavitation, anti-flash and anti-cavitation functions; (3) the throttle plate is easy and reliable to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model.

[0019] Figure 2 It is a cross-sectional schematic diagram of the throttling structure of the first embodiment of the utility model.

[0020] Figure 3 It is a front view schematic diagram of the throttling structure of the first embodiment of the utility model.

[0021] Figure 4 It is a cross-sectional schematic diagram of the throttling structure of the second embodiment of the utility model.

[0022] Figure 5 It is a cross-sectional schematic diagram of the throttling structure of the third embodiment of the utility model.

[0023] In the figure: valve body 1 valve seat 2 valve stem 3 valve core 4 throttle plate 5 throttle hole 6 first throttle plate 7 second throttle plate 8 throttle surface 9 mounting portion 10 third throttle plate 11. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0025] like Figure 1-3 In the embodiment shown, a noise reduction regulating ball valve comprises a valve body 1, in which a valve seat 2, a valve stem 3 and a valve core 4 are arranged. The valve seat 2 is installed at the inlet position of the valve body 1, the valve stem 3 is fixedly connected to the valve core 4, and the valve stem 3 is connected to the valve body 1 through a bearing. The valve core 4 is in the shape of a hemispherical shell, and the arc angle of its cross section is less than 180°. The valve core 4 is provided with a V-shaped opening, and the V-shaped opening has a sharp edge. During the rotation of the ball, it has a strong cutting force on the medium. The V-shaped opening of the ball and the flow channel of the valve seat 2 form a fan-shaped area, and the cross-sectional area of ​​the flow channel can be changed during the rotation process, so as to form a precise adjustment of the medium.

[0026] The valve body 1 is provided with a throttling structure, which is located at the outlet of the valve body 1. The throttling structure includes a plurality of throttling plates 5 arranged in parallel, and each of the throttling plates 5 is provided with a plurality of throttling holes 6. The throttling holes 6 on two adjacent throttling plates 5 are staggered, that is, the axes of the throttling holes 6 on the two adjacent throttling plates 5 do not overlap. The throttling structure in the present application can achieve noise reduction effects in two aspects. On the one hand, the throttling structure can buffer the medium, thereby greatly reducing the flow rate of the medium, thereby reducing the pressure between the medium and the cavity; on the other hand, the throttling structure can divert the medium, thereby making the flow stream thinner, and after the flow stream becomes thinner, a gap is generated between the wall of the cavity, thereby further reducing the pressure of the medium on the cavity. With the decrease in pressure, it can not only achieve the effect of noise reduction, but also realize the functions of anti-cavitation, anti-flash evaporation and anti-cavitation. The throttling holes 6 arranged in a staggered manner can make the direction of the medium constantly change and turn when the medium flows between multiple throttling plates 5, thereby continuously consuming the kinetic energy of the medium and further reducing the flow rate of the medium.

[0027] Furthermore, in this embodiment, the throttling structure includes three throttling plates 5, which are: a first throttling plate 7, a second throttling plate 8, and a third throttling plate 11. Since the throttling holes 6 on adjacent throttling plates 5 need to be staggered, the axes of the throttling holes 6 on the first throttling plate 7 and the throttling holes 6 on the third throttling plate 11 can be arranged to coincide.

[0028] The first throttle plate 7 includes a throttle surface 9 and a mounting portion 10 located at the outer edge of the throttle surface 9. The throttle holes 6 of the first throttle plate 7 are all arranged on the throttle surface 9, and the outer side of the mounting portion 10 is adapted to be installed in the valve body 1. The installation form is: a clamping ring is arranged on the outer side of the mounting portion 10, and an annular groove adapted to the clamping ring is arranged at the outlet of the valve body 1. Two mounting steps are arranged on the inner side of the mounting portion 10, and the other throttle plates 5 of the throttle structure except the first throttle plate 7, namely the second throttle plate 8 and the third throttle plate 11, are adapted to be installed on the mounting steps. The inner diameters of the throttle plates 5 except the first throttle plate 7 increase in sequence in the direction away from the first throttle plate 7, namely the inner diameter of the third throttle plate 11 is larger than the inner diameter of the second throttle plate 8. The second throttle plate 8 and the third throttle plate 11 are both fixed to the mounting step of the first throttle plate 7 by welding. The first throttle plate 7 is fixed to the annular groove of the valve body 1 by welding.

[0029] During use, as the valve stem 3 rotates, the valve core 4 gradually opens, and the medium enters the valve body 1 from the inlet of the valve body 1 and flows through the throttling structure; in the process of the medium flowing through the throttling structure, it is first buffered and decelerated by the first throttling plate 7, and the medium is diverted into a number of streams equal to the number of throttling holes 6; then, due to the staggered arrangement of the throttling holes 6 of the first throttling plate 7 and the second throttling plate 8, the diverted medium impacts the second throttling plate 8 and is buffered again, and enters the throttling holes 6 of the second throttling plate 8 after being diverted; similarly, the medium passing through the second throttling plate 8 is diverted again to enter the throttling holes 6 of the third throttling plate 11. After three consecutive bufferings, the flow velocity of the medium is greatly reduced, and the pressure generated on the cavity is greatly reduced. At the same time, since the outflowing medium is divided into a plurality of finer streams, a gap is generated between the medium and the cavity, further reducing the pressure.

[0030] like Figure 4 As shown, a noise reduction regulating ball valve comprises a valve body 1, in which a valve seat 2, a valve stem 3 and a valve core 4 are arranged. The valve seat 2 is installed at the inlet position of the valve body 1, the valve stem 3 is fixedly connected to the valve core 4, and the valve stem 3 and the valve body 1 are connected through a bearing. The valve core 4 is in the shape of a hemispherical shell, and the arc angle of its cross section is less than 180°. The valve core 4 is provided with a V-shaped opening, and the V-shaped opening has a sharp edge. During the rotation of the ball, it has a strong cutting force on the medium. The V-shaped opening of the ball and the flow channel of the valve seat 2 form a fan-shaped area, and the cross-sectional area of ​​the flow channel can be changed during the rotation process, so as to form a precise adjustment of the medium.

[0031] The valve body 1 is provided with a throttling structure, which is located at the outlet of the valve body 1. The throttling structure includes a plurality of throttling plates 5 arranged in parallel, and each of the throttling plates 5 is provided with a plurality of throttling holes 6. The throttling holes 6 on two adjacent throttling plates 5 are staggered, that is, the axes of the throttling holes 6 on the two adjacent throttling plates 5 do not overlap. The throttling structure in the present application can achieve noise reduction effects in two aspects. On the one hand, the throttling structure can buffer the medium, thereby greatly reducing the flow rate of the medium, thereby reducing the pressure between the medium and the cavity; on the other hand, the throttling structure can divert the medium, thereby making the flow stream thinner, and after the flow stream becomes thinner, a gap is generated between the wall of the cavity, thereby further reducing the pressure of the medium on the cavity. With the decrease in pressure, it can not only achieve the effect of noise reduction, but also realize the functions of anti-cavitation, anti-flash evaporation and anti-cavitation. The throttling holes 6 arranged in a staggered manner can make the direction of the medium constantly change and turn when the medium flows between multiple throttling plates 5, thereby continuously consuming the kinetic energy of the medium and further reducing the flow rate of the medium.

[0032] Furthermore, in this embodiment, the throttling structure includes two throttling plates 5, namely: a first throttling plate 7 and a second throttling plate 8. The first throttling plate 7 includes a throttling surface 9 and a mounting portion 10 located at the outer edge of the throttling surface 9. The throttling holes 6 of the first throttling plate 7 are all arranged on the throttling surface 9, and the outer side of the mounting portion 10 is adapted to be installed in the valve body 1. Its installation form is: a clamping ring is provided on the outer side of the mounting portion 10, and an annular groove adapted to the clamping ring is provided at the outlet of the valve body 1. A mounting step is provided on the inner side of the mounting portion 10, and the other throttling plates 5 of the throttling structure except the first throttling plate 7, that is, the second throttling plate 8, are adapted to be installed on the mounting step. The second throttling plate 8 is fixed to the mounting step of the first throttling plate 7 by welding. The first throttling plate 7 is fixed to the annular groove of the valve body 1 by welding.

[0033] During use, as the valve stem 3 rotates, the valve core 4 gradually opens, and the medium enters the valve body 1 from the inlet of the valve body 1 and flows through the throttling structure; in the process of the medium flowing through the throttling structure, it is first buffered and decelerated by the first throttling plate 7, and the medium is diverted into a number of streams equal to the number of throttling holes 6; then, due to the staggered arrangement of the throttling holes 6 of the first throttling plate 7 and the second throttling plate 8, the diverted medium impacts the second throttling plate 8 and is buffered again, and enters the throttling holes 6 of the second throttling plate 8 after turning. After three consecutive bufferings, the flow velocity of the medium is greatly reduced, and the pressure generated on the cavity is greatly reduced. At the same time, since the outflowing medium is divided into multiple finer streams, a gap is generated between the medium and the cavity, further reducing the pressure.

[0034] like Figure 5 As shown, a noise reduction regulating ball valve comprises a valve body 1, in which a valve seat 2, a valve stem 3 and a valve core 4 are arranged. The valve seat 2 is installed at the inlet position of the valve body 1, the valve stem 3 is fixedly connected to the valve core 4, and the valve stem 3 and the valve body 1 are connected through a bearing. The valve core 4 is in the shape of a hemispherical shell, and the arc angle of its cross section is less than 180°. The valve core 4 is provided with a V-shaped opening, and the V-shaped opening has a sharp edge. During the rotation of the ball, it has a strong cutting force on the medium. The V-shaped opening of the ball and the flow channel of the valve seat 2 form a fan-shaped area, and the cross-sectional area of ​​the flow channel can be changed during the rotation process, so as to form a precise adjustment of the medium.

[0035] The valve body 1 is provided with a throttling structure, which is located at the outlet of the valve body 1. The throttling structure includes a plurality of throttling plates 5 arranged in parallel, and each of the throttling plates 5 is provided with a plurality of throttling holes 6. The throttling holes 6 on two adjacent throttling plates 5 are staggered, that is, the axes of the throttling holes 6 on the two adjacent throttling plates 5 do not overlap. The throttling structure in the present application can achieve noise reduction effects in two aspects. On the one hand, the throttling structure can buffer the medium, thereby greatly reducing the flow rate of the medium, thereby reducing the pressure between the medium and the cavity; on the other hand, the throttling structure can divert the medium, thereby making the flow stream thinner, and after the flow stream becomes thinner, a gap is generated between the wall of the cavity, thereby further reducing the pressure of the medium on the cavity. With the decrease in pressure, it can not only achieve the effect of noise reduction, but also realize the functions of anti-cavitation, anti-flash evaporation and anti-cavitation. The throttling holes 6 arranged in a staggered manner can make the direction of the medium constantly change and turn when the medium flows between multiple throttling plates 5, thereby continuously consuming the kinetic energy of the medium and further reducing the flow rate of the medium.

[0036] Furthermore, in this embodiment, the throttling structure includes three throttling plates 5, which are: a first throttling plate 7, a second throttling plate 8, and a third throttling plate 11. Since the throttling holes 6 on adjacent throttling plates 5 need to be staggered, the axes of the throttling holes 6 on the first throttling plate 7 and the throttling holes 6 on the third throttling plate 11 can be arranged to coincide.

[0037] The aperture of the throttle hole 6 on the throttle plate 5 located upstream in the medium flow direction is larger than the aperture of the throttle hole 6 on the throttle plate 5 located downstream in the medium flow direction. In other words, the aperture of the throttle hole 6 decreases continuously from the first throttle plate 7 to the third throttle plate 11. With this structure, when the medium passes through the throttling structure, the flow beam gradually decreases in stages, and the buffer surface gradually increases, thereby preventing the upstream throttle plate 5 from being subjected to excessive pressure.

[0038] The first throttle plate 7 includes a throttle surface 9 and a mounting portion 10 located at the outer edge of the throttle surface 9. The throttle holes 6 of the first throttle plate 7 are all arranged on the throttle surface 9, and the outer side of the mounting portion 10 is adapted to be installed in the valve body 1. The installation form is: a clamping ring is arranged on the outer side of the mounting portion 10, and an annular groove adapted to the clamping ring is arranged at the outlet of the valve body 1. Two mounting steps are arranged on the inner side of the mounting portion 10, and the other throttle plates 5 of the throttle structure except the first throttle plate 7, namely the second throttle plate 8 and the third throttle plate 11, are adapted to be installed on the mounting steps. The inner diameters of the throttle plates 5 except the first throttle plate 7 increase in sequence in the direction away from the first throttle plate 7, namely the inner diameter of the third throttle plate 11 is larger than the inner diameter of the second throttle plate 8. The second throttle plate 8 and the third throttle plate 11 are both fixed to the mounting step of the first throttle plate 7 by welding. The first throttle plate 7 is fixed to the annular groove of the valve body 1 by welding.

[0039] During use, as the valve stem 3 rotates, the valve core 4 gradually opens, and the medium enters the valve body 1 from the inlet of the valve body 1 and flows through the throttling structure; in the process of the medium flowing through the throttling structure, it is first buffered and decelerated by the first throttling plate 7, and the medium is diverted into a number of streams equal to the number of throttling holes 6; then, due to the staggered arrangement of the throttling holes 6 of the first throttling plate 7 and the second throttling plate 8, the diverted medium impacts the second throttling plate 8 and is buffered again, and enters the throttling holes 6 of the second throttling plate 8 after being diverted; similarly, the medium passing through the second throttling plate 8 is diverted again to enter the throttling holes 6 of the third throttling plate 11. After three consecutive bufferings, the flow velocity of the medium is greatly reduced, and the pressure generated on the cavity is greatly reduced. At the same time, since the outflowing medium is divided into a plurality of finer streams, a gap is generated between the medium and the cavity, further reducing the pressure.

Claims

1. A noise reduction regulating ball valve, characterized in that: It includes a valve body, in which a throttling structure is arranged, and the throttling structure is located at the outlet of the valve body. The throttling structure includes a plurality of throttling plates arranged in parallel, and each of the throttling plates is provided with a plurality of throttling holes, and the aperture of the throttling hole on the throttling plate located upstream in the medium flow direction is larger than the aperture of the throttling hole on the throttling plate located downstream in the medium flow direction.

2. A noise reduction regulating ball valve according to claim 1, characterized in that: The throttle holes on two adjacent throttle plates are staggered.

3. The noise reduction regulating ball valve according to claim 1 is characterized in that: The throttling structure comprises a first throttling plate, wherein the first throttling plate comprises a throttling surface and a mounting portion located at an outer edge of the throttling surface, wherein the outer side of the mounting portion is adapted to be mounted in the valve body.

4. A noise reduction regulating ball valve according to claim 3, characterized in that: An installation step is arranged on the inner side of the installation portion, and the other throttle plates of the throttling structure except the first throttle plate are adapted to be installed on the installation step.

5. A noise reduction regulating ball valve according to claim 4, characterized in that: The inner diameters of the plurality of throttle plates except the first throttle plate increase sequentially in a direction away from the first throttle plate.

6. The noise reduction regulating ball valve according to claim 4 is characterized in that: The other throttle plates except the first throttle plate are fixed to the mounting portion of the first throttle plate by welding, and the first throttle plate is fixed to the valve body by welding.

7. A noise reduction regulating ball valve according to any one of claims 1 to 6, characterized in that: A valve stem, a valve core and a valve seat are also provided in the valve body. The valve stem is fixedly connected to the valve core, and the valve seat is located at the inlet of the valve body.

8. The noise reduction regulating ball valve according to claim 7 is characterized in that: The valve core is in the shape of a hemispherical shell, and the arc angle of its cross section is less than 180°.

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