Device for reducing flow noise and valve

Technical Field

The present invention relates to reduce flow noise of the device and valve, and in particular to be able to implement the pipeline manner of noise reduction of the flow control device.

Background Art

On the flow-of-control, management noise so that the noise will not endanger the environment or work around is very important. For example, by noise-reducing material and to increase the pipeline included in the device and the wall thickness of the non-in all cases are useful. Therefore, also in order to reduce the noise caused by the flow of the influencing flow its own way.

The free jet with the degree of noise generated by the increase of the velocity of flow and increases notably. On the pipeline in a flow control valve, similar to the case of the free jet of the final gide leads to the pipeline, in this case wherein the flow rate of an obvious role in the generation of the noise. Gide a sufficiently large flow cross-section which will only decrease the flow velocity.

; The smaller the diameter of the jet, the free jet the higher the frequency of the noise. The higher the frequency, the more effective on the pipe wall can be issued to reduce the noise of the pipe.

Flow control in the control valve of the differential pressure is relatively large. For example, transfer and storage by increasing the gas pressure to reduce the volume of the gas. Gas in a controlled manner from the high pressure has dropped to a lower pressure of the practical operation. In the throttle member of the control valve, the gas in the flow rate of the pressure difference increases to supersonic speed.

Content of the invention

The purpose of this invention is to solve the above-mentioned problem and to provide can effectively reduce flow noise of the flow control in the programme. The purpose is to reduce flow noise of the device and valve, wherein the device comprises: an entrance surface, is provided with a hole for receiving the inlet of the fluid flow, characterized in that the apparatus further comprises: a plurality of rooms, the inlet surface of the inlet hole opening to the room, said inlet hole corresponding to the specific chamber, and an inlet hole opening to each chamber, of single room the opening to the cross-sectional area is larger than the inlet of the chamber of a flow cross-sectional area of the hole, and the outlet orifice of the corresponding to the specific chamber, for the transfer of the fluid flow from the chamber, each outlet orifice of a flow cross-sectional area is smaller than the cross-sectional area of the chamber, all single room total flow of the outlet port opening to the cross-sectional area is larger than the inlet of the pulsation in the flow cross-sectional area of the hole, and the shape of the room along the edge of the outlet hole, and at least one of the chamber is provided with three, six or seven hole; the valve includes: a flow channel, and the closing member, is located in said flow passage, the closure member from the closed to the flow of the valve moved to the position of the channel through the valve the flow of the flow of the channel becomes feasible position, device, is arranged in the flow path, in order to reduce the flow noise, the device comprises: an entrance surface, for receiving the fluid flow is provided with an inlet aperture, characterized in that the apparatus further comprises: chamber, the inlet surface of the inlet hole opening to the room, said inlet hole corresponding to the specific chamber, and an inlet hole opening to each chamber, and of single room the opening to the cross-sectional area is larger than the inlet of the chamber of a flow cross-sectional area of the hole, and the outlet orifice of the corresponding to the specific chamber, for the transfer of the fluid flow from the chamber, each outlet orifice of a flow cross-sectional area is smaller than the cross-sectional area of the chamber, all single room total flow of the outlet port opening to the cross-sectional area is larger than the inlet of the pulsation in the flow cross-sectional area of the hole, and the shape of the room along the edge of the outlet hole, and at least one of the chamber is provided with three, six or seven hole.

In order to reduce flow noise, the use of a device, in the device, the fluid flows through the one or more of the inlet hole are introduced into a chamber, the chamber cross-sectional area of the inlet of the chamber is larger than the total cross-sectional area of the hole, flow from the chamber via a plurality of small outlet orifice forward, each outlet orifice of a flow cross-sectional area is smaller than the cross-sectional area of the chamber, and all of the outlet orifice cross-sectional area of the inlet of the chamber is larger than the total cross-sectional area of the hole. This makes the chamber be able to be used for realizing flow controlled change in an effective noise reduction and, as far as possible, the divided into more small part of the flow. The device can be used separately in the pipeline, or may be integrated in the valve.

According to the device of this invention and the valve of the preferred embodiment in the accompanying is disclosed in the dependent claims.

Description of drawings

Via the example below and with reference to the attached drawing a more detailed description of the invention, wherein:

Fig. 1 to fig. 3 show 1st embodiment of the device,

Figure 4 shows an optional design of the room,

Figure 5 shows the device in the valve,

Figure 6 shown according to fig. 5 of the large flow cross-sectional area of the light,

Figure 7 shows the efficiency of the attenuation flow noise,

Figure 8 shows a 2nd embodiment of the device,

Figure 9 shows a 3rd embodiment of the device, and

Fig. 10 to fig. 11 shows a 4th embodiment of the device.

Mode of execution

Fig. 1 to fig. 3 show 1st embodiment of the device. Figure 1 is partial section, Figure of device 1 of a perspective view, Figure 2 is the device in Figure 1 3 the shows the room the design of the cross-flow region.

The following, as an example it is assumed that the device is arranged to lean against each other to the three parts (for example, three plates) and implement, as shown in an exemplary manner. However, attention should be paid to, because the necessary kong Heshi can also be other ways of implementing (for example, machining inlet and outlet orifice and some part of the chamber is shown), therefore, is not in all embodiment must be so.

In Figure 1 the example scenario, which is located on the left of the part 2 has an inlet surface, the inlet surface is provided with a plurality of the fluid flow is used for admitting an inlet aperture 3. The intermediate part 4 is equipped with the room 5, in this case, inlet opening 3 corresponding to the specific chamber, that is, each inlet hole towards a chamber opening only, so that the from the single inlet opening of the fluid flow to the one chamber only. An inlet hole (as shown in the Figure an example natural situation) or more of the inlet opening 3 to the single room capable of opening 5 in. Located on the right of the part 6 is provided with a plurality of corresponding to each of the outlet orifices of the chamber 7. Ingate and outlet hole can be round. However, this is not essential, according to the manufacturing method, the hole also can have other shapes.

Figure 1 the device is provided with a plurality of parallel chamber 5, reaches the apparatus 1 by the inlet surface of the fluid flows through an inlet aperture 3 and is the minute enters the inner rooms 5 in. In the device 1 after, via outlet orifice 7 of the chamber leave parallel a plurality of relatively small fluid flow in, for example, can be disposed with the device in the pipeline or valve flow is merged again.

Figure 2 show single room the inlet hole 5 and the chamber 3 and the outlet orifice 7. Chamber 5 of the cross-section area A2 is greater than the inlet 3 of a flow cross-sectional area A1, each outlet hole 7 of a flow cross-sectional area A3 is smaller than the cross-sectional area of the chamber, but the outlet orifice 7 of the total flow cross sectional area greater than that of inlet A1 of a flow cross-sectional area. If the entire length of the chamber in the cross-sectional area of different, for example room is conical, the largest of the chamber than the inlet cross-sectional area of the flow cross-sectional area of the hole, the flow of each outlet orifice of the chamber cross-sectional area is smaller than the maximum flow cross-sectional area.

If more than one in an inlet aperture opening to the single room , then the chamber total flow of the outlet port opening to the cross-sectional area is larger than in the chamber of the total of the inlet opening of the flow cross-sectional area. When the fluid, for example the volume of the gas with the pressure decrease and when expanding, the flow cross-sectional area of the restricted flow rate for such expansion is necessary.

When, for example, gas and other fluid flow via one or more of the inlet hole 3 in the large differential pressure under a limited depth be guided into the chamber 5 and then in the chamber 5 is formed in the impact of the supersonic jet, does not allow the impact free to continue, will cause vibration and noise. On the contrary, the impact attached to the surface by the impact is limited to the chamber 5, in the chamber they can control, freedom from this is usually caused by the impact noise can be effectively minimized. Impact effectively reduce the pressure level, will not be subject to prevent forming the same. Attached through the limiting surfaces of the their receives the room , only as an important source of vibration is prevented. Therefore allow of the fluid admitted in the chamber via outlet orifice 7 is discharged into a relatively small flow. In this text, ultrasonic means is that the flow rate is higher than the sound velocity of the fluid in the fluid flow, such as air flow.

Figure 3 shown on removal of Figure 1 at the left side of the member 2 under the condition of, from the direction of fluid flow a part of the device. Therefore, in fact, Figure 3 of the intermediate part in 4 located on the top (closest to the viewer), and Figure 1 the right side of part 6 is located at the bottom. In the Figure 3 in, part 4 surface areas become darker, in order to make it and the relatively shallow part 6 is easier to distinguish between the surface of the.

In Figure 3 can be seen, in order to produce the greatest possible surface area of the total flow, outlet orifice 7 distributed as effectively as possible in the part 6 above. In this example, is provided in the part 4 of the chamber in 5 shape is not round, the shape of the chamber along the outlet orifice 7 the edge of, the outlet hole 7 corresponding to the specific chamber, that is, flows into a outlet orifice 7 of the fluid from only one chamber 5. The exemplary final result is that the chamber 5 via the seven outlet orifice 7 opening.

In the Figure 2 and Figure 3 can be seen, in these outlet orifice 7, , intermediate outlet hole 8 and the inlet hole 3 is arranged generally coaxially with, that is, with the chamber 5 an inlet aperture 3 at least partially in the same line. Therefore, is admitted in the chamber 5 from the inlet hole in the 3 at least a part of the flow is allowed to move linearly, thus, by the intermediate outlet hole 8 to leave. Via intermediate outlet hole 8, therefore higher than the velocity of flow of the via from around the middle of the outlet port the velocity of flow of the hole. Therefore, high-speed stream may be relatively high noise is of relatively slow and small around chirp voice glide , therefore a higher noise attenuation is relatively slow stream, but will not be directly transmitted to the environment.

Not all of the outlet hole must be the same size. A viable alternative scheme is intermediate outlet hole 8 is slightly greater than its surrounding the outlet aperture 7.

Figure 4 shows an optional design scheme of the room. In the Figure 4 in, single room opening to the three egress hole. This design also provides a solution, wherein the the last component along the flow direction 6 in, the outlet orifice 7 can be arranged as close as possible-intensive, their total surface area therefore is made as large as possible.

Fig. 5 shown is arranged in the valve 9 of the Figure 1 device 1. Figure 9 is shown as an example in the valve is a control valve. In Figure 5 in, device 1 as an example or even is set up in the valve 9 in two different places of, the closure member is located at a 10 in, and along the flow direction in the valve 9 in the flow channel after (in fact is located in flange 11 after, valve 9 through the flange 11 is connected to the pipeline 12). In practice, Figure 1 of the device can in this way be applied to make the plurality of device 1 set up in succession along the flow direction. Alternatively, a single device 1 is sufficiently feasible, in this case its can be set up in Figure 5 any position shown in.

In Figure 5 in, is arranged in the closing member 10 of the device and the closing member 10 together with the flow channel from the closed valve 13 to move the position of the flow of the valve via the device 1 the position of the as. In the Figure 5 example, valve 9 is ball valve, its closing member 10 by rotating the (for example by means of the closing member of the shaft, not shown in the Figure) to move and clear. In Figure 5 the case, the closing member 9 in its path situated approximately at an intermediate position between the limit position, in the branch flow passage 13 is partially open. The device therefore allow the fluid to flow through 1 the some-hole 3, 7 and chamber 5 to move forward to the pipeline 12. Because the chamber 5 does not have a shared inlet opening 3 or outlet hole 7, therefore, flow can only via its inlet opening (Figure 5 in) from Figure 5 the flow of the left side of the chamber.

The flange 11 is connected with the can be obviously the illustrated device of the valve status 9 after, as shown, attached to the flow passage 13, or alternatively, the pipeline 12 from valve 9 more far.

In Figure 1 in, device 1 of the inlet surface (that is, is provided with an inlet hole 3 surface) shown as convex. With this different, the surface may be concave, particularly if the device is arranged in the valve closure member of the flow passage 13 in. This concave an entrance surface of the closure member can be matched with the spherical shape and therefore positioned close to the spherical surface. In this case, in a closed position of the opening of the part of the component, which is composed of an inlet hole 3, chamber 5 and outlet hole 7 formed in the flow passage of the flow of only one part.

In diagram 5 different, flow passage 13 is provided with a device also can be located in 1 of the closing member 10 before. In this case, the device can have concave surface of outlet port, in other words, export hole 7 is of the opening surface of the concave surface. Device 1 can therefore immediately along the flow direction has a spherical surface of the closure member 10 before.

Figure 6 shown according to fig. 5 the valve 9 increase the flow cross-sectional area. Fig. 6 shown is arranged in the closing member 10 of the device 1 the inlet hole 3 in the closure member 9 a plurality of the different rotation angle will be a large part from Figure 5 the flow of the left side of the.

In Figure 6 can be seen, after the rotary stage I, only three inlet hole 3 to flow. When the closure member is further rotated from this position, after the rotary stage II, more inlet hole 3 to flow, and III after the rotary stage, the inlet of the flow have further increased the number of the hole. This corresponds to the closing member is rotated to the Figure 5 position shown in the in the case. When the closure member is rotated further, the ultimate will stop the closing member is rotated to the Figure 6 device, it can be seen that 1 have been the front surface of the position of the rotation towards the flow.

feasible , stage I to flow after the inlet hole (as well as room and from the outlet orifice of the extension of the chamber) is smaller than the flow cross-sectional area of the subsequent rotary stage (e.g., rotational stage III) flow after the inlet hole 3 (as well as room and from the outlet orifice of the extension of the chamber) of a flow cross-sectional area.

Figure 7 is set when the device is shown in Figure 5 when in the tube is shown, by fig. 1 to fig. 3 of the device shown in the efficiency of flowing noise attenuation.

In Figure 7 in, the vertical axis expresses the noise dB (A), at the same time the pressure difference of the horizontal axis indicating device than dp/p1, wherein the flow channel 13 is the diameter of 100 mm (D N100), the device 1 is provided with a diameter is 6 mm of the 54 entry hole 3, the depth is 3 mm the 54 room , chamber opening to the outlet opening 7 in, the outlet diameter of the hole is is 3.7 mm. Figure 7 in the drawing by a dashed line to the curve of each chamber is provided with seven outlet hole of the case, one of the outlet hole and the inlet hole is positioned in the middle part of the are substantially coaxial, with the inlet opening at least partially in the same line, the rest of the outlet opening around the outlet orifice, as shown in Figure 2 and Figure 3. The uniform curve of the drawing to the middle of the hole is not the case, the export the quantity of the holes is six.

Figure 8 shows a 2nd embodiment of the device. Figure 8 to a great extent of the embodiment corresponding to the Figure 1 embodiment, therefore will be mainly below through the Figure 1 embodiment to explain the difference between the Figure 8 embodiment.

Figure 8 the device 1' of the left half part of the of the (inlet hole 3, chamber 5 and the outlet orifice 7) completely matching Figure 1 the device is shown in 1. However, in this embodiment, more than one set up in succession the corresponding device. Therefore, the outlet orifice 7 at the same time constitute a 2nd chamber 5 'of the inlet hole, so that each outlet hole 7 leads to its own 2nd special-purpose room 5'. And fig. 8 different, can also be more than one outlet hole 7 to each 2nd chamber 5'. Each 2nd chamber 5 'is provided with its own single outlet orifice 7, to allow fluid from the stream from the 2nd chamber 5' to move forward. Each 2nd chamber 5 'is greater than the cross-sectional area of the outlet orifice 7 or to the supply of the outlet port of the fluid flow cross-sectional area, from the 2nd chamber 5' further leads to the outlet opening 7 of the total flow cross sectional area greater than that of the outlet orifice 7 or to the 2nd chamber for supplying the fluid of the outlet of the flow cross-sectional area of the hole.

Figure 9 shows a 3rd embodiment of the device. Figure 9 the embodiment of a large extent, corresponding to the Figure 1 embodiment, therefore will be mainly below through the Figure 1 embodiment to explain the difference between the Figure 9 embodiment.

Figure 9 of the device 1" of the left half part of the of the (inlet hole 3, chamber 5 and the outlet orifice 7) completely matching Figure 1 the device is shown in 1. However, in this embodiment, the outlet orifice 7 at the same time constitute a 2nd chamber 5" of the inlet hole. Using only a single 2nd chamber 5", its receiving from the chamber 5 of all the outlet orifice 7 of the fluid flow. To allow a flow of fluid from the 2nd chamber 5" through the plurality of outlet orifices 7 to move forward.

Figure 10 and Figure 11 show the device 1' " 4th embodiment of the. Figure 10 and Figure 11 is an embodiment of device for use in the linear valve 1 of the 'aoPunctuation0' a cross-sectional view, Figure 10 shows the device is installed in the linear valve 9' in.

In Figure 10 and Figure 11 embodiment, device 1 'aoPunctuation1' , 15 ' "and 16' " to implement. In the example of the Figure, of the innermost cylinder 14 ' "is provided with an inlet hole 3, in the middle of the cylinder 15' " is equipped with the room 5, the outermost cylinder 16' " is provided with an outlet hole 7. Ingate, chamber and the outlet hole is arranged and size as the disclosed embodiment of the relevant before.

Replace the cylinder, instead of one or a plurality of cylinders, using, for example, the ring can be stacked on top of each other, so that the ring in the appropriate is provided with the necessary groove and/or holes, forming therebetween inlet, chamber and/or the outlet hole.

Linear valve 9 ' "of the closing member 10' " in the Figure as an example shown as a cylindrical piston, in the diagram and the shaft 17" ' together with the flow passage in the closed valve position and fully open flow of the valve vertically between the position of the channel to the mobile.

Should be understood, the above description and the related Figures is only intended to describe this invention. To the technicians of this field it is obvious that, without departing from the scope of the present invention under the condition of, the present invention also can be other mode change and variation.