阅读说明：本技术 一种降噪套筒和减压降噪阀 (Noise reduction sleeve and pressure reduction noise reduction valve ) 是由 宋树基 周刚 康强 王天文 董英杰 汪民 万双民 杨永宏 王华有 欧泽波 欧阳普 于 2020-12-09 设计创作，主要内容包括：本发明涉及一种降噪套筒和减压降噪阀,降噪套筒包括中心轴线沿上下方向延伸的套筒体,所述套筒体的筒壁上设有多个节流孔,所述套筒体的筒壁上连接有多个向内凸出于所述套筒体的内壁的导流部,多个所述导流部上均设有垂直于上下方向的截面呈弧线形的弧形凹面,多个所述弧形凹面分别与多个所述节流孔一一对应设置,每个所述弧形凹面用于将经与其对应的所述节流孔中流入的介质的流向改变至从外至内向所述套筒体的周向倾斜的方向,减压降噪阀内设有上述的降噪套筒。本发明能够减小减压阀运行过程中的噪声。(The invention relates to a noise reduction sleeve and a pressure reduction and noise reduction valve, wherein the noise reduction sleeve comprises a sleeve body, the central axis of the sleeve body extends along the vertical direction, a plurality of throttling holes are arranged on the wall of the sleeve body, a plurality of flow guide parts which are inwards protruded out of the inner wall of the sleeve body are connected to the wall of the sleeve body, arc concave surfaces which are perpendicular to the vertical direction and have arc-shaped cross sections are arranged on the flow guide parts, the arc concave surfaces are respectively arranged corresponding to the throttling holes one by one, each arc concave surface is used for changing the flow direction of a medium flowing in the corresponding throttling hole to the direction which inclines towards the circumferential direction of the sleeve body from the outside to the inside, and the noise reduction sleeve is arranged in the pressure reduction and noise reduction valve. The invention can reduce the noise of the pressure reducing valve in the operation process.)

1. A noise reducing sleeve, characterized by: the sleeve body that extends along upper and lower direction including the central axis, be equipped with a plurality of orifices on the section of thick bamboo wall of sleeve body, be connected with a plurality of inside protrusions on the section of thick bamboo wall of sleeve body and stretch out in the water conservancy diversion portion of the inner wall of sleeve body, it is a plurality of the cross-section that all is equipped with the upper and lower direction of perpendicular to in the water conservancy diversion portion is the arc concave surface of camber line, and is a plurality of the arc concave surface respectively with a plurality of the orifice one-to-one sets up, every the arc concave surface is used for changing the process rather than corresponding the flow direction of the medium that flows in the orifice to from outer to interior the direction of the.

2. The noise reduction sleeve of claim 1, wherein: one side of the arc concave surface close to the cylinder wall of the sleeve body is connected with the throttling hole corresponding to the arc concave surface.

3. The noise reduction sleeve of claim 1, wherein: the flow guide parts are arc-shaped plates which incline in the circumferential direction of the sleeve body from outside to inside, and the slope of the arc-shaped plates which incline in the circumferential direction of the sleeve body from outside to inside is small outside and large inside.

4. The noise reduction sleeve of claim 3, wherein: the guide parts form a plurality of first guide plates extending along the up-down direction, the plurality of first guide plates are arranged along the circumferential interval of the sleeve body, and each first guide plate is formed by sequentially connecting at least two guide parts.

5. The noise reduction sleeve of claim 4, wherein: the inclination directions of the first guide plates from outside to inside to the circumferential inclination of the sleeve body are consistent.

6. The noise reduction sleeve of claim 3, wherein: a plurality of the diversion part constitutes the polylith and follows the second guide plate that the direction extends from top to bottom and the polylith along the third guide plate that the direction extends from top to bottom, every the second guide plate is by at least two the diversion part connects gradually and forms, the polylith the second guide plate is followed the circumference interval arrangement of the cover barrel, every the third guide plate is by at least two the diversion part connects gradually and forms, the polylith the third guide plate is followed the circumference interval arrangement of the cover barrel, the polylith the second guide plate is located the polylith the upside of third guide plate, the polylith the second guide plate is from outside to inside the slope direction of the circumference slope of the cover barrel is unanimous, the polylith the third guide plate is from outside to inside the slope direction of the circumference slope of the cover barrel is unanimous, the polylith the second guide plate is from outside to inside the slope direction of the circumference slope of the cover barrel and polylith the third guide plate is from outside to inside the slope direction of the circumference slope direction of the And the reverse.

7. A decompression and noise reduction valve comprises a valve body provided with a medium inlet channel and a medium outlet channel, a partition plate is arranged in the valve body, a valve port communicated with the medium inlet channel and the medium outlet channel is arranged on the partition plate, and a throttling cone capable of adjusting the opening degree of the valve port is further arranged in the valve body, and the decompression and noise reduction valve is characterized in that: a noise reduction sleeve as defined in any of claims 1-5 mounted on said partition, said sleeve body having an interior chamber in communication with said valve port, said media inlet passage being in communication with said sleeve body interior chamber through a plurality of said orifices.

8. A pressure reducing and noise reducing valve as defined in claim 7, wherein: the upper portion of the interior of the valve body is provided with a cylinder sleeve, the upper end of the sleeve body is connected with the cylinder sleeve, and the lower end of the sleeve body is connected with the valve port on the partition plate.

9. A pressure reducing and noise reducing valve as defined in claim 8, wherein: the sleeve body is a cylindrical part with an upper opening and a lower opening.

10. A decompression and noise reduction valve comprises a valve body provided with a medium inlet channel and a medium outlet channel, a partition plate is arranged in the valve body, a valve port communicated with the medium inlet channel and the medium outlet channel is arranged on the partition plate, and a throttling cone capable of adjusting the opening degree of the valve port is further arranged in the valve body, and the decompression and noise reduction valve is characterized in that: a noise reduction sleeve as defined in claim 6 mounted on said spacer, said sleeve body having an interior chamber in communication with said valve port, said media inlet passage being in communication with said sleeve body interior chamber through a plurality of said orifices.

Technical Field

The invention relates to a valve, in particular to a noise reduction sleeve and a pressure reduction and noise reduction valve.

Background

For example, chinese patent application No. CN201410555665.9 discloses a piston type pressure reducing valve, and the pressure reducing valve with such a structure is commonly used in a hydropower station technology water supply system. In the practical use process, the pressure reducing valve is found to have the problem of high operation noise due to the fact that the pressure reducing ratio is high and the water supply flow of the unit technology is high when the inlet pressure of the pressure reducing valve is high, and the maximum operation noise value of the pressure reducing valve reaches more than one hundred decibels, so that the body health of field workers is seriously influenced.

Disclosure of Invention

The invention aims to provide a noise reduction sleeve and a pressure reduction and noise reduction valve so as to reduce noise in the operation process of the pressure reduction valve.

The noise reduction sleeve comprises a sleeve body, wherein the central axis of the sleeve body extends in the vertical direction, a plurality of throttling holes are formed in the wall of the sleeve body, a plurality of flow guide parts which are inwards protruded out of the inner wall of the sleeve body are connected to the wall of the sleeve body, arc-shaped concave surfaces which are perpendicular to the vertical direction and are arc-shaped in cross section are arranged on the flow guide parts, the arc-shaped concave surfaces are respectively arranged in one-to-one correspondence with the throttling holes, and each arc-shaped concave surface is used for changing the flow direction of a medium flowing into the corresponding throttling hole to the direction which is inclined towards the circumferential direction of the sleeve body from the outside to the inside.

In one embodiment, one side of the arc-shaped concave surface close to the wall of the sleeve body is connected with the throttling hole corresponding to the arc-shaped concave surface.

In an embodiment, each of the flow guides is an arc-shaped plate which is inclined from outside to inside in the circumferential direction of the sleeve body, and the slope of the arc-shaped plate which is inclined from outside to inside in the circumferential direction of the sleeve body is small outside and large inside.

In an embodiment, the plurality of flow guide portions form a plurality of first flow guide plates extending in the vertical direction, the plurality of first flow guide plates are arranged at intervals along the circumferential direction of the sleeve body, and each first flow guide plate is formed by sequentially connecting at least two flow guide portions.

In one embodiment, the first baffles are inclined from outside to inside in the same direction in the circumferential direction of the sleeve body.

In an embodiment, the guide parts form a plurality of second guide plates extending along the vertical direction and a plurality of third guide plates extending along the vertical direction, each second guide plate is formed by sequentially connecting at least two guide parts, a plurality of second guide plates are arranged along the circumferential interval of the sleeve body, each third guide plate is formed by sequentially connecting at least two guide parts, a plurality of third guide plates are arranged along the circumferential interval of the sleeve body, a plurality of second guide plates are arranged on the upper sides of the third guide plates, a plurality of second guide plates are arranged from outside to inside along the circumferential inclined direction of the sleeve body, a plurality of third guide plates are arranged from outside to inside along the circumferential inclined direction of the sleeve body, and a plurality of second guide plates are arranged from outside to inside along the circumferential inclined direction of the sleeve body and a plurality of third guide plates are arranged from outside to inside along the circumferential inclined direction of the sleeve body The inclination direction of the circumferential inclination is opposite.

The invention also provides a pressure-reducing noise-reducing valve which comprises a valve body provided with a medium inlet channel and a medium outlet channel, wherein a partition plate is arranged in the valve body, a valve port communicated with the medium inlet channel and the medium outlet channel is arranged on the partition plate, a throttling cone capable of adjusting the opening degree of the valve port is also arranged in the valve body, the noise-reducing sleeve is mounted on the partition plate, the inner cavity of the sleeve body is communicated with the valve port, and the medium inlet channel is communicated with the inner cavity of the sleeve body through a plurality of throttling holes.

In an embodiment mode, a cylinder sleeve is arranged on the upper portion inside the valve body, the upper end of the sleeve body is connected with the cylinder sleeve, and the lower end of the sleeve body is connected with the valve port on the partition plate.

In one embodiment, the sleeve body is a cylindrical member with upper and lower openings.

The invention also provides a pressure-reducing noise-reducing valve which comprises a valve body provided with a medium inlet channel and a medium outlet channel, wherein a partition plate is arranged in the valve body, a valve port for communicating the medium inlet channel with the medium outlet channel is arranged on the partition plate, a throttling cone capable of adjusting the opening degree of the valve port is also arranged in the valve body, the other noise-reducing sleeve is arranged on the partition plate, the inner cavity of the sleeve body is communicated with the valve port, and the medium inlet channel is communicated with the inner cavity of the sleeve body through a plurality of throttling holes.

The conventional pressure reducing valve in the prior art mainly uses liquid flow noise and cavitation noise, and the key is to reduce the noise of the pressure reducing valve and reduce the overhigh fluid flow rate at the throttling port of the pressure reducing valve. Meanwhile, as the flow passing through the pressure reducing valve is ensured to be unchanged, the opening degree of the throttling cone needs to be increased when the flow speed of the throttling opening is reduced; through setting up the sleeve of making an uproar, the valve of making an uproar just falls in decompression has become the two-stage decompression by the single-stage decompression of conventional relief valve, promptly: the noise reduction sleeve is used for reducing the noise of the first stage, the throttle cone increases the opening degree of the valve port and reduces the flow speed of the valve port, and the noise of the second stage is reduced, so that the overall noise reduction target of the pressure reduction noise reduction valve is realized.

The noise reduction sleeve has the advantages that two-stage noise reduction is formed, the overall noise in the operation process of the pressure reduction and noise reduction valve can be reduced, and meanwhile, the overall noise in the operation process of the pressure reduction and noise reduction valve can be reduced from multiple aspects through the noise reduction sleeve which is optimally designed. According to CFD simulation of the pressure reduction and noise reduction valve and hydropower station test conditions, compared with an original conventional pressure reduction valve, the noise of the improved pressure reduction and noise reduction valve is obviously reduced, and compared with the pressure reduction and noise reduction valve provided with a noise reduction sleeve with a guide plate being a slant straight plate, the improved pressure reduction and noise reduction valve is lower in fluid noise.

Drawings

FIG. 1 is a schematic view of a noise reduction sleeve according to one embodiment;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic structural view of a noise reduction sleeve according to a second embodiment;

FIG. 4 is a view taken along direction A of FIG. 3;

FIG. 5 is a schematic structural view of a pressure reducing and noise reducing valve according to the third embodiment;

FIG. 6 is a schematic structural view of a pressure reducing and noise reducing valve according to the fourth embodiment;

fig. 7 is a schematic structural view of a noise reduction sleeve in which the deflector is a diagonal plate.

In the figure: 1-a valve body; 2-a medium inlet channel; 3-medium outflow channel; 4, cylinder sleeve; 5-a valve stem; 6-valve port; 7-a throttling cone; 8-a sleeve body; 9-orifice; 10-a first baffle; 11-a second baffle; 12-a third baffle; 13-arrow head; 14-a fairing; 15-partition.

Detailed Description

The invention will be further explained with reference to the drawings.

Example one

As shown in fig. 1 and 2, the noise reduction sleeve includes a sleeve body 8 with a central axis extending in the up-down direction, a plurality of orifices 9 are arranged on the wall of the sleeve body 8, a plurality of flow guide portions protruding inwards from the inner wall of the sleeve body 8 are connected to the wall of the sleeve body 8, arc concave surfaces with arc-shaped cross sections perpendicular to the up-down direction are arranged on the flow guide portions, the arc concave surfaces are respectively arranged in one-to-one correspondence with the orifices 9, each arc concave surface blocks a flow path of a medium flowing in from the orifice 9 corresponding to the arc concave surface, and each arc concave surface is used for changing the flow direction of the medium flowing in the orifice 9 corresponding to the arc concave surface to the direction inclined from the outside to the inside in the circumferential direction of the sleeve body 8.

In this embodiment, the side of the arc concave surface close to the wall of the sleeve body 8 is connected with the corresponding orifice 9, so that the medium flowing out from the orifice 9 directly flows along the arc concave surface and changes the flow direction of the medium through the arc concave surface.

In this embodiment, each of the plurality of flow guiding portions is an arc-shaped plate which is inclined from outside to inside in the circumferential direction of the sleeve body 8, and the slope of the arc-shaped plate which is inclined from outside to inside in the circumferential direction of the sleeve body 8 is small outside and large inside, where the small outside and large inside mean that the slope of the arc-shaped plate close to the outside is smaller than the slope of the arc-shaped plate close to the inside, and the slope of the arc-shaped plate close to the inside is larger than the slope of the arc-shaped plate close to the outside. The section of the arc-shaped plate vertical to the up-down direction is arc-shaped, and the arc line of the arc-shaped plate can be made into a curve such as an arc line, a parabola, a hyperbola, a cycloid and the like.

In this embodiment, the plurality of flow guiding portions form a plurality of first flow guiding plates 10 extending in the up-down direction, the plurality of first flow guiding plates 10 are arranged at intervals along the circumferential direction of the sleeve body 8, and each first flow guiding plate 10 is formed by sequentially connecting at least two flow guiding portions.

In the present embodiment, the plurality of first baffles 10 are inclined in the same direction from the outside to the inside in the circumferential direction of the sleeve body 8.

By adopting the noise reduction sleeve, the plurality of throttling holes 9 on the sleeve body 8 can complete the first-stage pressure reduction and noise reduction, and the throttling effect of the plurality of throttling holes 9 on the sleeve body 8 can increase the flow resistance to reduce the pressure on the upper part of the throttling cone of the pressure reduction and noise reduction valve, so that the opening degree of the valve port is increased, the flow speed of a medium at the valve port can be reduced, the second-stage pressure reduction and noise reduction at the valve port is formed, and the overall noise of the pressure reduction and noise reduction valve is reduced. As the flow direction of the medium is shown by an arrow 13 in fig. 1, the flow direction of the medium is changed by arranging a plurality of first guide plates 10, and the process of changing the flow direction of the medium can consume the energy of the medium; meanwhile, the flow direction of the medium is changed by the first guide plates 10 to form a rotational flow, and the energy of the medium can be further consumed by forming the rotational flow; because the first guide plates 10 protrude inwards from the inner wall of the sleeve body 8, the rotational flow in the sleeve body 8 can be blocked by the first guide plates 10 in the rotating process, and the energy of the medium can be consumed; on the other hand, during the process of changing the flow direction of the medium on the first guide plate 10, a part of the medium will be diffused in the up-down direction, so that the medium flowing into the throttle holes 9 adjacent in the up-down direction will also interact to consume the energy of the part of the medium. The energy of the medium can be consumed from at least four aspects by arranging a plurality of first guide plates 10, and the overall noise of the decompression and noise reduction valve is further reduced. On the other hand, through setting up the telescopic intensity of making an uproar that falls can be promoted to first guide plate 10 of polylith, can reduce and fall the sleeve of making an uproar and take place the deformation and the possibility of damaging in production, transportation, assembly and use, can prevent because fall the new noise that the sleeve deformation brought of making an uproar, be favorable to falling the telescopic lightweight of making an uproar. Further, foretell sleeve of making an uproar falls for the sleeve of making an uproar falls of oblique straight plate for the guide plate shown in fig. 7, foretell sleeve's of making an uproar flow guide part of falling is equipped with the arc concave surface, the flow direction of the medium of change that can be more smooth, reduce the direct impact of medium and the noise that produces on the flow guide part, the flow direction of the change medium that can be more wide-angle, be favorable to more improving the inside flow field of sleeve of making an uproar falls, further supplementary reduction fluid noise, the flow guide part can set to the arc simultaneously, the structural strength of arc is stronger, can further promote the telescopic structural strength of making an uproar falls.

Example two

As shown in fig. 3 and 4, the noise reduction sleeve in this embodiment is different from the noise reduction sleeve in the first embodiment in the arrangement of a plurality of flow guiding portions, in this embodiment, the plurality of flow guiding portions constitute a plurality of second flow guiding plates 11 extending in the up-down direction and a plurality of third flow guiding plates 12 extending in the up-down direction, each second flow guiding plate 11 is formed by sequentially connecting at least two flow guiding portions, the plurality of second flow guiding plates 11 are arranged at intervals along the circumferential direction of the sleeve body 8, each third flow guiding plate 12 is formed by sequentially connecting at least two flow guiding portions, the plurality of third flow guiding plates 12 are arranged at intervals along the circumferential direction of the sleeve body 8, the plurality of second flow guiding plates 11 are located on the upper sides of the plurality of third flow guiding plates 12, the plurality of second flow guiding plates 11 are consistent in the inclination direction inclined from the outside to the inside to the circumferential direction of the sleeve body 8, the plurality of third flow guiding plates 12 are consistent in the inclination direction inclined from the outside to the, the inclination direction of the plurality of second guide plates 11 inclining from outside to inside to the circumferential direction of the sleeve body 8 is opposite to the inclination direction of the plurality of third guide plates 12 inclining from outside to inside to the circumferential direction of the sleeve body 8. Through polylith second guide plate 11 and polylith third guide plate 12, can take shape two-layer whirl about, and the flow direction of two-layer whirl is opposite, can further consume the energy, further reduce the noise.

EXAMPLE III

As shown in fig. 5, the pressure reducing and noise reducing valve includes a valve body 1 having a medium inlet channel 2 and a medium outlet channel 3, a partition plate 15 is disposed in the valve body 1, a valve port 6 communicating the medium inlet channel 2 and the medium outlet channel 3 is disposed on the partition plate 15, a valve stem 5 and a throttle cone 7 mounted at a lower end of the valve stem 5 are further disposed in the valve body 1, an opening degree of the valve port 6 can be adjusted by the throttle cone 7, a piston generally engaged with a cylinder sleeve 4 is disposed at an upper end of the valve stem 5, a fairing 14 is disposed at a lower side of the throttle cone 7, a noise reducing sleeve as described in the first embodiment is mounted on the partition plate 15, an inner cavity of the sleeve body 8 is communicated with the valve port 6, and the medium inlet channel 2 is communicated. In specific implementation, a driving structure for driving the valve rod 5 may be further connected to the valve body 1, and for example, the prior art, for example, chinese patent with application number CN201410555665.9 and named as a piston type pressure reducing valve, may be referred to.

In this embodiment, a cylinder sleeve 4 is disposed at the upper part of the interior of the valve body 1, the upper end of the sleeve body 8 is connected to the cylinder sleeve 4, and the lower end of the sleeve body 8 is connected to the valve port 6 of the partition 15. Further, the sleeve body 8 is a cylindrical member opened at the upper and lower sides. The cylinder sleeve 4 seals the upper end opening of the sleeve body 8, the lower end part of the sleeve body 8 is matched with the valve port 6, the lower end opening of the sleeve body 8 corresponds to the valve port 6, a medium in the medium inlet channel 2 flows into the inner cavity of the sleeve body 8 through the plurality of throttling holes 9 and then flows to the medium outlet channel 3 through the valve port 6, and when the pressure reducing and noise reducing valve described in the embodiment is applied to a hydropower station, the medium is water.

As an improvement, the fairing 14 is a conical piece with a large diameter at the top and a small diameter at the bottom, an outward convex splitter plate is arranged on the conical surface of the fairing 14 and is perpendicular to the circumferential direction of the fairing 14, the splitter plate is favorable for decomposing and eliminating large vortexes formed by high-speed fluid below the throttling cone 7, and part of vortexes and vortexes generated by the noise reduction sleeve can be decomposed and eliminated by the splitter plate, so that pressure fluctuation is reduced.

Example four

As shown in fig. 6, the difference between the present embodiment and the third embodiment lies in the structure difference of the noise reduction sleeve, the pressure reduction and noise reduction valve described in the present embodiment includes a valve body 1 provided with a medium inlet channel 2 and a medium outlet channel 3, a partition plate 15 is provided in the valve body 1, a valve port 6 communicating the medium inlet channel 2 and the medium outlet channel 3 is provided on the partition plate 15, a throttle cone 7 capable of adjusting the opening degree of the valve port 6 is further provided in the valve body 1, the noise reduction sleeve described in the second embodiment is installed on the partition plate 15, the inner cavity of the sleeve body 8 is communicated with the valve port 6, and the medium inlet channel 2 is communicated with the inner cavity of the sleeve body 8 through a plurality of throttle holes 9.