阅读说明：本技术 一种整流罩和减压阀 (Fairing and pressure reducing 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：本发明涉及一种整流罩和减压阀,整流罩包括呈圆锥体状的罩体,所述罩体的外侧壁为直径上大下小的锥面,所述罩体的外侧壁为向外凸的曲面,所述罩体的外侧壁上连接多块分流板,多块所述分流板沿所述罩体的周向间隔设置,多块所述分流板均垂直于所述罩体的周向设置,减压阀内设有该整流罩,本发明能够减小减压阀运行过程中的噪声。(The invention relates to a fairing and a pressure reducing valve, wherein the fairing comprises a conical cover body, the outer side wall of the cover body is a conical surface with a large diameter at the top and a small diameter at the bottom, the outer side wall of the cover body is an outward convex curved surface, the outer side wall of the cover body is connected with a plurality of flow distribution plates, the flow distribution plates are arranged at intervals along the circumferential direction of the cover body, the flow distribution plates are all arranged perpendicular to the circumferential direction of the cover body, and the fairing is arranged in the pressure reducing valve.)

1. A fairing, characterized by: including the cover body that is the cone form, the lateral wall of the cover body is the conical surface of big-end-up in diameter, the lateral wall of the cover body is the curved surface of evagination, connect polylith flow distribution plate, polylith on the lateral wall of the cover body the flow distribution plate is followed the circumference interval of the cover body sets up, the polylith the equal perpendicular to of flow distribution plate the circumference setting of the cover body.

2. The fairing as recited in claim 1, further comprising: the plurality of the splitter plates are arranged at equal intervals along the circumferential direction of the cover body.

3. The fairing as recited in claim 1, further comprising: the upper edge of the splitter plate is connected with the outer side wall of the cover body, and the lower edge of the splitter plate extends upwards from inside to outside.

4. A pressure reducing valve, characterized by: the fairing 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, a throttling cone capable of adjusting the opening degree of the valve port is further arranged in the valve body, and the lower side of the throttling cone is connected with the fairing as claimed in any one of claims 1-3.

5. The pressure reducing valve according to claim 4, wherein: the noise reduction sleeve is installed on the partition plate, an inner cavity of the noise reduction sleeve is communicated with the valve port, a plurality of throttling holes are formed in the side wall of the noise reduction sleeve, the medium inlet channel is communicated with the inner cavity of the noise reduction sleeve through the throttling holes, a plurality of flow guide portions protruding inwards out of the inner wall of the noise reduction sleeve are connected to the wall of the noise reduction sleeve, arc-shaped concave surfaces perpendicular to the vertical direction and with arc-shaped cross sections are arranged on the flow guide portions, the arc-shaped concave surfaces are 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 inclined towards the circumferential direction of the noise reduction sleeve from outside to inside.

6. The pressure reducing valve according to claim 5, wherein: and one side of each arc-shaped concave surface, which is close to the wall of the noise reduction sleeve, is connected with the corresponding throttling hole.

7. The pressure reducing valve according to claim 5, wherein: the flow guide parts are arc-shaped plates which incline in the circumferential direction of the noise reduction sleeve from outside to inside, and the slope of the arc-shaped plates which incline in the circumferential direction of the noise reduction sleeve from outside to inside is small outside and large inside.

8. The pressure reducing valve according to claim 7, wherein: the flow guide parts form a plurality of first flow guide plates extending in the up-down direction, the first flow guide plates are arranged along the circumferential direction of the noise reduction sleeve at intervals, and each first flow guide plate is formed by sequentially connecting at least two flow guide parts.

9. The pressure reducing valve according to claim 8, wherein: the inclination directions of the first guide plates from outside to inside to the circumferential inclination of the noise reduction sleeve are consistent.

10. The pressure reducing valve according to claim 7, wherein: a plurality of the diversion parts constitute a plurality of second diversion plates extending along the up-down direction and a plurality of third diversion plates extending along the up-down direction, each second diversion plate is formed by at least two diversion parts which are connected in sequence, a plurality of the second diversion plates are arranged along the circumferential interval of the noise reduction sleeve, each third diversion plate is formed by at least two diversion parts which are connected in sequence, a plurality of the third diversion plates are arranged along the circumferential interval of the noise reduction sleeve, a plurality of the second diversion plates are arranged on the upper side of the third diversion plates, a plurality of the second diversion plates are arranged from the outside to the inside along the circumferential inclination direction of the noise reduction sleeve, a plurality of the third diversion plates are arranged from the outside to the inside along the circumferential inclination direction of the noise reduction sleeve, a plurality of the second diversion plates are arranged from the outside to the inside along the circumferential inclination direction of the noise reduction sleeve and a plurality of the third diversion plates are arranged from the outside to the inside along the circumferential inclination direction of the noise reduction Is inclined in the opposite direction.

Technical Field

The invention relates to a valve, in particular to a fairing and a pressure reducing 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 fairing and a pressure reducing valve so as to reduce noise in the operation process of the pressure reducing valve.

The fairing comprises a conical cover body, the outer side wall of the cover body is a conical surface with the diameter being large at the top and small at the bottom, the outer side wall of the cover body is an outward convex curved surface, a plurality of splitter plates are connected to the outer side wall of the cover body, the splitter plates are arranged at intervals along the circumferential direction of the cover body, and the splitter plates are all perpendicular to the circumferential direction of the cover body.

In one embodiment, the plurality of splitter plates are arranged at equal intervals along the circumferential direction of the cover body.

In one embodiment, the upper edge of the diverter plate is attached to the outer sidewall of the housing and the lower edge of the diverter plate extends upwardly from the inside to the outside.

The invention also provides a pressure 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 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, and the lower side of the throttling cone is connected with the fairing as claimed in any one of claims 1-3.

In a specific embodiment, the partition board is provided with a noise reduction sleeve, an inner cavity of the noise reduction sleeve is communicated with the valve port, a plurality of orifices are arranged on a side wall of the noise reduction sleeve, the medium inlet channel is communicated with the inner cavity of the noise reduction sleeve through the orifices, a plurality of flow guide parts which protrude inwards from an inner wall of the noise reduction sleeve are connected to a cylinder wall of the noise reduction sleeve, arc-shaped concave surfaces which are perpendicular to the vertical direction and have arc-shaped cross sections are arranged on the flow guide parts, the arc-shaped concave surfaces are respectively arranged in one-to-one correspondence with the orifices, and each arc-shaped concave surface is used for changing the flow direction of a medium flowing into the orifice corresponding to the arc-shaped concave surface to the direction inclined towards the circumferential direction of the noise reduction sleeve from outside to inside.

In a specific embodiment, one side of each arc-shaped concave surface close to the wall of the noise reduction sleeve is connected with the throttling hole corresponding to the arc-shaped concave surface.

In a specific embodiment, each of the flow guiding portions is an arc-shaped plate which is inclined from outside to inside to the circumferential direction of the noise reduction sleeve, and the slope of the arc-shaped plate from outside to inside to the circumferential direction of the noise reduction sleeve is small outside and large inside.

In a specific implementation mode, the plurality of flow guide parts 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 noise reduction sleeve, and each first flow guide plate is formed by sequentially connecting at least two flow guide parts.

In one embodiment, the plurality of first deflectors are inclined in the same direction from the outside to the inside toward the circumferential direction of the noise reduction sleeve.

In a specific embodiment, the plurality of flow guide parts form a plurality of second flow guide plates extending along the vertical direction and a plurality of third flow guide plates extending along the vertical direction, each second flow guide plate is formed by sequentially connecting at least two flow guide parts, a plurality of second flow guide plates are arranged along the circumferential direction of the noise reduction sleeve at intervals, each third flow guide plate is formed by sequentially connecting at least two flow guide parts, a plurality of third flow guide plates are arranged along the circumferential direction of the noise reduction sleeve at intervals, a plurality of second flow guide plates are arranged on the upper sides of the plurality of third flow guide plates, a plurality of second flow guide plates are consistent in the inclination direction of the circumferential inclination of the noise reduction sleeve from outside to inside, a plurality of third flow guide plates are consistent in the inclination direction of the circumferential inclination of the noise reduction sleeve from outside to inside, and a plurality of second flow guide plates are consistent in the inclination direction of the circumferential inclination of the noise reduction sleeve from outside to inside and a plurality of third flow guide plates are consistent in the inclination direction of The inclination directions of the circumferential inclination of the noise reduction sleeve are opposite.

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; by providing a noise reduction sleeve, the pressure reducing valve is changed from the single-stage pressure reduction of the conventional pressure reducing valve to a two-stage pressure reduction, namely: the noise reduction sleeve reduces noise for the first stage, the throttle cone increases the opening degree of the valve port and reduces the flow speed at the valve port for the second stage, and therefore the overall noise reduction target of the pressure reducing valve is achieved.

The invention utilizes the fairing to improve the flow field, can relieve the cavitation effect possibly existing in a certain working condition, and simultaneously improves the pressure stabilizing effect of the pressure reducing valve, the outer side wall of the hood body is arranged into an outward convex curved surface which is more favorable for matching with the internal shape of the valve body of the pressure reducing valve, and the flow distribution plate is arranged for decomposing and eliminating a large vortex formed by high-speed outflow from the valve port below the throttling cone, thereby reducing pressure fluctuation, ensuring that fluid flow is smoother and reducing the fluid noise of the pressure reducing valve. The pressure reducing valve also forms two-stage noise reduction, so that the overall noise of the pressure reducing valve in the operation process can be reduced, and meanwhile, the overall noise of the pressure reducing valve in the operation process can be reduced from multiple aspects through the optimally designed noise reduction sleeve. According to CFD simulation of the pressure reducing valve and hydropower station test conditions, compared with the conventional pressure reducing valve, the noise of the improved pressure reducing valve is obviously reduced, and compared with the pressure reducing valve provided with the noise reduction sleeve with the inclined straight guide plate, the fluid noise of the improved pressure reducing valve is lower.

Drawings

FIG. 1 is a cross-sectional view of a fairing as described in the first embodiment;

FIG. 2 is a schematic view of a fairing according to the first embodiment;

FIG. 3 is a schematic structural view of a pressure reducing valve according to a second embodiment;

FIG. 4 is a schematic structural view of the noise reduction sleeve of the second embodiment;

FIG. 5 is an enlarged partial view of FIG. 4;

FIG. 6 is a schematic structural view of a noise reduction sleeve according to a third embodiment;

FIG. 7 is a view taken along the direction A in FIG. 6;

fig. 8 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-noise reduction sleeve; 9-orifice; 10-a first baffle; 11-a second baffle; 12-a third baffle; 13-arrow head; 14-a cover body; 15-a separator; 16-splitter plate.

Detailed Description

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

Example one

The fairing as shown in fig. 1 and 2 comprises a conical cover body 14, the outer side wall of the cover body 14 is a conical surface with a large diameter at the top and a small diameter at the bottom, the outer side wall of the cover body 14 is an outward convex curved surface, a plurality of splitter plates 16 are connected to the outer side wall of the cover body 14, the plurality of splitter plates 16 are arranged at intervals along the circumferential direction of the cover body 14, and the plurality of splitter plates 16 are all arranged perpendicular to the circumferential direction of the cover body 14.

In the present embodiment, the plurality of flow distribution plates 16 are arranged at equal intervals in the circumferential direction of the cover 14.

In this embodiment, the upper edge of the diverter plate 16 is connected to the outer side wall of the cover 14, and the lower edge of the diverter plate 16 is a curved edge extending upward from the inside to the outside.

The fairing is mainly used for improving a flow field, relieving a cavitation effect possibly existing under a certain working condition, improving the pressure stabilizing effect of the pressure reducing valve, setting the outer side wall of the cover body 14 to be an outward convex curved surface, and being more beneficial to matching with the internal shape of a valve body of the pressure reducing valve, and setting the flow distribution plate to be beneficial to decomposing and eliminating large vortexes formed by flowing out of a valve opening at a high speed below the throttling cone, so that pressure fluctuation is reduced.

The outer side wall of the cover body 14 is a curved surface which is convex outwards and can be made into a curved surface such as a circular arc surface, a parabolic surface, a hyperbolic surface, a cycloid surface and the like according to specific working conditions. The lower edge of the splitter plate 16 may be curved in a shape of a circular arc, a parabola, a hyperbolic curve, a cycloid, etc., according to specific working conditions.

Example two

The pressure reducing valve shown in fig. 3 to 5 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 valve stem 5 and a throttle cone 7 installed at a lower end of the valve stem 5 are further provided in the valve body 1, the throttle cone 7 can adjust an opening degree of the valve port 6, a piston matched with a cylinder sleeve 4 is generally provided at an upper end of the valve stem 5, a fairing described in the first embodiment is connected to a lower side of the throttle cone 7, the lower end of the valve stem 5 passes through the throttle cone 7 and the fairing, a step surface abutting against the throttle cone 7 downwards is provided on the valve stem 5, a nut is connected to the lower end of the valve stem 5, and the throttle cone 7 and the fairing are. 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 noise reduction sleeve 8 is connected to the cylinder sleeve 4, and the lower end of the noise reduction sleeve 8 is connected to the valve port 6 of the partition plate 15. Further, the noise reduction sleeve 8 is a cylindrical member having an upper opening and a lower opening. The cylinder sleeve 4 blocks an upper end opening of the noise reduction sleeve 8, the lower end portion of the noise reduction sleeve 8 is in interference fit with the valve port 6, a lower end opening of the noise reduction sleeve 8 corresponds to the valve port 6, a medium in the medium inlet channel 2 flows into an inner cavity of the noise reduction sleeve 8 through the plurality of throttle holes 9 and then flows to the medium outlet channel 3 through the valve port 6.

In this embodiment, install on the baffle 15 and fall sleeve 8 of making an uproar, the inner chamber of falling sleeve 8 of making an uproar is linked together with valve port 6, it is equipped with a plurality of orifices 9 on sleeve 8's the lateral wall to fall, medium access passage 2 is linked together through a plurality of orifices 9 and sleeve 8's of making an uproar inner chamber of making an uproar, it is connected with a plurality of inside water conservancy diversion portions that protrude in sleeve 8's the inner wall of making an uproar to fall on sleeve 8's the section of falling sleeve 8 to fall to be connected with on the section of the perpendicular to upper and lower direction, a plurality of arc concave surfaces set up with a plurality of orifices 9 one-to-one respectively, every arc concave surface is arranged in changing the direction of the circumference slope of the medium that flows in through orifice.

In this embodiment, each of the arcuate concave surfaces is engaged with its corresponding orifice 9 on the side thereof facing the wall of the noise reduction sleeve 8. So that the medium flowing out of the orifice 9 flows directly along the arc-shaped concave surface and changes the flow direction of the medium through the arc-shaped concave surface.

In this embodiment, each of the plurality of flow guiding portions is an arc-shaped plate which is inclined in the circumferential direction of the noise reduction sleeve 8 from outside to inside, and the slope of the circumferential inclination of the noise reduction sleeve 8 from outside to inside is small from outside to inside and is large from outside to inside, where 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 noise reduction sleeve 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 deflectors 10 are inclined in the same direction from the outside to the inside in the circumferential direction of the noise reduction sleeve 8.

By adopting the pressure reducing valve, the flow field of the fairing can be improved, the cavitation effect possibly existing under a certain working condition is relieved, the pressure stabilizing effect of the pressure reducing valve is improved, the outer side wall of the cover body 14 is set to be an outward convex curved surface, the outward convex curved surface is more favorable for being matched with the internal shape of a valve body of the pressure reducing valve, the flow distribution plate is arranged, the large vortex formed by high-speed outflow from a valve opening below the throttling cone is decomposed and eliminated, the pressure fluctuation is reduced, and meanwhile, part of the vortex and the vortex generated due to the noise reduction sleeve 8 can be decomposed and. A plurality of orifices 9 on the sleeve 8 of making an uproar can accomplish the first level and reduce the noise, again because the throttle effect of a plurality of orifices 9 on the sleeve 8 of making an uproar can increase the flow resistance and can make the reduction of pressure in the throttle cone upper portion of relief pressure valve reduce for the aperture of valve port increases, and the velocity of flow of valve port department medium can reduce, forms the second level decompression of valve port department and falls the noise, thereby makes the reduction of pressure reducing valve overall noise reduce. As shown by an arrow 13 in fig. 4, 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 noise reduction sleeve 8, the rotational flow in the noise reduction sleeve 8 is blocked by the first guide plates 10 in the rotating process, and the energy of a 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 provision of a plurality of first baffles 10 allows the energy of the medium to be dissipated in at least four ways, further reducing the overall noise of the pressure reducing valve. On the other hand, through setting up the intensity that the sleeve 8 of making an uproar falls can be promoted to the first guide plate 10 of polylith, can reduce and fall the sleeve 8 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 sleeve 8 of making an uproar warp and bring, be favorable to falling the lightweight of sleeve 8 of making an uproar. Further, foretell sleeve 8 of making an uproar falls for the sleeve 8 of making an uproar falls that the guide plate shown in fig. 8 is the oblique straight board, foretell sleeve 8 of making an uproar falls's water conservancy diversion portion 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 water conservancy diversion portion, the flow direction of the change medium that can be more wide-angle, more be favorable to improving the inside flow field of sleeve 8 of making an uproar falls, further supplementary fluid noise that reduces, the water conservancy diversion portion can set to the arc simultaneously, the structural strength of arc is stronger, can further promote sleeve 8 of making an uproar falls's structural.

EXAMPLE III

As shown in fig. 6 and fig. 7, the noise reduction sleeve 8 in this embodiment is different from the noise reduction sleeve 8 in the first embodiment in the arrangement of a plurality of flow guiding portions, in this embodiment, the plurality of flow guiding portions form 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 noise reduction sleeve 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 noise reduction sleeve 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 inclination directions of the plurality of second flow guiding plates 11 inclining from the outside to the inside to the circumferential direction of the noise reduction sleeve 8 are the same, the inclination directions of the plurality of third flow guiding plates 12 inclining, the inclination direction of the circumferential inclination of the plurality of second baffles 11 from outside to inside of the noise reduction sleeve 8 is opposite to the inclination direction of the circumferential inclination of the plurality of third baffles 12 from outside to inside of the noise reduction sleeve 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.