CN213017753U

CN213017753U - Combined low-noise butterfly valve

Info

Publication number: CN213017753U
Application number: CN202021516062.5U
Authority: CN
Inventors: 沈存斌; 徐军; 李迎松
Original assignee: Dongtai Oceangoing Marine Fittings Co ltd
Current assignee: Dongtai Oceangoing Marine Fittings Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-04-20
Anticipated expiration: 2030-07-28

Abstract

The utility model discloses a combined low-noise butterfly valve, which comprises a valve body, a valve seat, a valve rod and a valve disc, wherein the output side of the valve body is connected with at least one noise elimination component, the outer end of the outermost noise elimination component is connected with an output interface disc, and elastic sealing gaskets are arranged among the valve body, the noise elimination component and the output interface disc; the silencing assembly comprises an output pipe and a silencing outer sleeve which enclose a silencing annular cavity, the inner wall of the output pipe is provided with a throttling convex ring with a trapezoidal or circular arc-shaped section, and the pipe walls of the output pipe at two sides of the throttling convex ring are provided with output pipe through holes; the silencing ring cavity is internally provided with a separating pipe, an expansion cavity is formed between the separating pipe and the output pipe, the separating pipe and the silencing outer sleeve are axially divided into a plurality of energy storage cavities, an energy storage air bag is arranged in each energy storage cavity, and the wall of the separating pipe is provided with a separating pipe through hole. Adopt the utility model discloses a combination formula low noise butterfly valve can effectively reduce the butterfly valve and open the produced noise of process to can prevent the noise to outwards propagate through the pipeline.

Description

Combined low-noise butterfly valve

Technical Field

The utility model relates to a butterfly valve especially relates to an improvement of amortization function of butterfly valve.

Background

The butterfly valve makes its and disk seat open, closes the opening and close of control fluid passage through rotating the valve disc, and the angle of opening and close of valve disc is 90 for the opening and close process of butterfly valve is comparatively rapid, can open or close fluid passage rapidly, therefore uses comparatively extensively. However, the rapidly opened butterfly valve causes the fluid in the butterfly valve to suddenly rush out, which causes large impact to the valve body and the pipeline, and high noise, and the impact and the noise can also spread outwards through the pipeline, and the noise not only causes noise pollution to the environment, but also can cause damage to the hiding performance of objects in certain occasions, which cannot be tolerated. The existing butterfly valve noise reduction processing mainly focuses on a valve body on an output side, but because the valve body is connected with an input and output pipeline through input and output interfaces at two ends, noise is still transmitted to an external pipeline through the input and output interfaces, and because of the difference of the pressure of the input side of the butterfly valve and the difference of the caliber, the impact part caused by fluid after the butterfly valve is opened is different in distance, namely the generation part of the noise may exceed the range of the valve body and is transmitted outwards through a pipeline, so the noise reduction effect is not ideal.

SUMMERY OF THE UTILITY MODEL

The above-mentioned not enough to prior art exists, the utility model aims to solve the technical problem that a modular low noise butterfly valve is provided, it can effectively reduce the butterfly valve and open the produced noise of process to can prevent that the noise from passing through the pipeline and outwards propagating.

In order to solve the technical problem, the utility model discloses a combined low-noise butterfly valve, including the valve body, install disk seat and valve rod on the valve body, install the valve disc on the valve rod, be equipped with the input interface dish on the input side of valve body, be connected with at least one noise elimination subassembly on the side that the valve body output side is close to the disk seat, be connected with the output interface dish in the noise elimination subassembly outer end of outermost end, all be equipped with the elastic sealing pad between valve body and noise elimination subassembly, between the adjacent noise elimination subassembly and between noise elimination subassembly and the output interface dish; the silencing assembly comprises an output pipe and a silencing outer sleeve, a silencing annular cavity is enclosed between the silencing outer sleeve and the output pipe, a throttling convex ring with a trapezoidal or circular arc-shaped section is arranged on the inner wall of the output pipe, and the pipe walls of the output pipe on two sides of the throttling convex ring are provided with output pipe through holes; the energy-saving silencing device is characterized in that a separation pipe is arranged in a silencing ring cavity on the periphery of the output pipe, an expansion cavity is formed between the separation pipe and the output pipe, a cavity formed between the separation pipe and the silencing outer sleeve is axially separated into a plurality of energy storage cavities, an energy storage air bag is arranged in each energy storage cavity, and a separation pipe through hole is formed in the pipe wall of the separation pipe.

In the structure, because at least one noise elimination component is connected on the side surface of the valve body output side close to the valve seat, the outer end of the outermost noise elimination component is connected with an output interface disc, elastic sealing gaskets are respectively arranged between the valve body and the noise elimination component, between adjacent noise elimination components and between the noise elimination component and the output interface disc, the valve body, the noise elimination component and the output interface disc form a butterfly valve assembly, when the butterfly valve is opened, fluid which is gushed from the input side of the butterfly valve directly impacts the noise elimination component connected on the side surface of the valve body output side close to the valve seat without impacting the valve body, the noise elimination component absorbs the impact kinetic energy of the fluid on the noise elimination component to play a noise elimination role, the number of the noise elimination components can be combined and increased according to the working condition of a pipeline, the impact part of the fluid is within the action range of the noise elimination component after the butterfly valve is opened, the elastic sealing gaskets arranged between the adjacent noise elimination assemblies and between the noise elimination assemblies and the output interface disc not only ensure the mutual sealing, but also play a role in preventing the noise from being transmitted to the valve body and the output interface disc and outwards through the valve body and the output interface disc, thereby effectively reducing the noise generated in the opening process of the butterfly valve and preventing the noise from being transmitted outwards through a pipeline.

The silencing assembly comprises an output pipe and a silencing outer sleeve, a silencing annular cavity is enclosed between the silencing outer sleeve and the output pipe, a throttling convex ring with a trapezoidal or circular-arc-shaped section is arranged on the inner wall of the output pipe, and the pipe walls of the output pipe on two sides of the throttling convex ring are provided with output pipe through holes; the noise elimination ring cavity around the output pipe is provided with a separating pipe, an expansion cavity is formed between the separating pipe and the output pipe, a cavity formed between the separating pipe and the noise elimination jacket is axially divided into a plurality of energy storage cavities, an energy storage air bag is arranged in the energy storage cavity, the pipe wall of the separating pipe is provided with a separating pipe perforation, the throttling convex ring enables a part of fluid which is gushed out after the butterfly valve is opened and impacts the output pipe to enter the expansion cavity formed between the separating pipe and the output pipe from the output pipe perforation on the front side of the throttling convex ring of the output pipe, then the fluid flows back into the output pipe from the output pipe perforation on the rear side of the throttling convex ring, through the sudden expansion and contraction of the flow channel, the sudden change of the section of the flow channel of the sound wave causes the sudden change of the acoustic impedance in the flow channel, the propagation direction of the sound wave is changed, the reflection and interference phenomena occur in the pipe, thereby effectively realizing the noise elimination, the perforation of the output pipe plays a role in damping, impact sound energy generated by the fluid to the output pipe is converted into heat energy to be dissipated, and noise pulsation is greatly reduced; when the valve disc is opened, the gushed fluid enters the expansion cavity through the output pipe perforation on the output pipe, and then the fluid higher than the pressure of the energy storage air bag enters the energy storage cavity through the separation pipe perforation to press the energy storage air bag, so that the energy storage air bag contracts to absorb the pulsation part higher than the average flow in the fluid. Therefore, the noise generated in the opening process of the butterfly valve is effectively reduced through the noise elimination assembly, and the attenuation of the fluid pressure pulsation and the control of the noise can be realized when the pressure and the flow of the fluid flowing through the butterfly valve are changed after the butterfly valve is opened.

The utility model discloses a preferred embodiment output tube one end periphery is equipped with the convex shoulder, the hole of noise elimination overcoat is the step hole corresponding with output tube periphery and convex shoulder, encloses into the noise elimination ring chamber between the step hole of noise elimination overcoat and output tube periphery and convex shoulder. By adopting the embodiment, the output pipe and the silencing outer sleeve can naturally form the silencing annular cavity after being assembled, and the manufacturing and the installation are convenient.

The utility model discloses a another kind of preferred embodiment, the cross-section of throttle bulge loop is bilateral symmetry's trapezoidal or convex. By adopting the embodiment, the throttling convex ring with the cross section in the shape of the trapezoid or the circular arc in bilateral symmetry can reduce the flow resistance of the output pipe on one hand, and is convenient to manufacture on the other hand.

In another preferred embodiment of the present invention, the aperture of the outlet pipe perforation and the aperture of the separation pipe perforation are both 5 to 15 mm; the perforation rate of the perforated section of the output pipe is 15% -30%; the perforation rate of the perforated section of the separation tube is 15% -30%. By adopting the implementation mode, the noise reduction requirement of the butterfly valve with common specifications can be met.

The utility model discloses further preferred embodiment be equipped with respectively on the convex shoulder inboard of output tube and noise elimination overcoat step hole bottom with the corresponding annular in divider tube position, the divider tube both ends are pegged graft respectively in output tube and the noise elimination overcoat is sheathe in corresponding annular. By adopting the embodiment, the separation pipe can be reliably installed and fixed, the vibration in the working process caused by instable installation of the separation pipe is prevented, and the working noise is avoided.

In another preferred embodiment of the present invention, the chamber formed between the separation tube and the noise elimination casing is axially separated into two to three energy storage chambers by a separation ring. By adopting the embodiment, two to three energy storage cavities can be provided with two to three energy storage air bags, and each energy storage air bag can have different internal pressure, thereby being capable of meeting the noise reduction requirement in the opening process of the common butterfly valve.

In a further preferred embodiment of the present invention, the energy storage airbag is an inflatable soft rubber airbag. By adopting the embodiment, the pressure of the energy storage air bag can be conveniently controlled, and the soft rubber air bag has good elasticity and high sensitivity in the energy storage process.

The utility model discloses further preferred embodiment noise elimination overcoat both ends are equipped with flange, are equipped with the ring flange corresponding with this flange on valve body and output interface dish. By adopting the embodiment, the valve body, the output interface disc and the silencing assembly are convenient and reliable to connect.

In a further preferred embodiment of the present invention, a sound insulating layer is provided around the sound attenuation module. By adopting the embodiment, the noise existing in the working process of the noise elimination assembly can be better blocked through the sound insulation layer, and the noise reduction effect is further ensured.

In a still further preferred embodiment of the present invention, the soundproof layer is a coating layer of soundproof material. By adopting the embodiment, the sound insulation layer is simple and convenient to manufacture and has a good effect.

Drawings

The combined low-noise butterfly valve of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural view of an embodiment of the combined low noise butterfly valve of the present invention;

fig. 2 is an enlarged schematic view of the muffling assembly of the structure of fig. 1.

In the figure: 1-input interface disc, 2-valve body, 3-flange plate, 4-valve seat, 5-valve rod, 6-valve disc, 7-silencing component, 71-silencing outer sleeve, 72-shoulder, 73-ring groove, 74-separating tube perforation, 75-separating ring sheet, 76-energy storage cavity, 77-separating tube, 78-energy storage air bag, 79-output tube perforation, 710-throttling convex ring, 711-output tube, 712-expansion cavity, 713-connecting flange, 8-sound insulation layer, 9-elastic sealing gasket and 10-output interface disc.

Detailed Description

In the combined low-noise butterfly valve shown in fig. 1, a valve seat 4 is mounted on a valve body 2, a valve disc 6 forming a sealing pair with the valve seat 4 is mounted on a valve rod 5, the valve rod 5 is rotatably supported on the valve body 2, an input interface disc 1 is arranged at the input side of the valve body 2, the valve rod 5 is positioned between the valve seat 4 and the input interface disc 1, and the components of the valve body 2, the valve rod 5, the valve disc 6, the valve seat 4 and the like shown in the figure form a conventional input side structure of a three-eccentric butterfly valve. The side surface of the valve body 2 close to the output side of the valve seat 4 is a plane, the side surface of the valve body 2 close to the output side of the valve seat 4 is connected with at least one silencing assembly 7 through a flange 3, two silencing assemblies 7 are connected in the figure, of course, three or more silencing assemblies 7 can be connected, the outer end of the outermost silencing assembly 7 is connected with an output interface disc 10 through the flange 3, elastic sealing gaskets 9 are arranged between the valve body 2 and the silencing assemblies 7, between the adjacent silencing assemblies 7 and between the silencing assemblies 7 and the output interface disc 10, a sound insulation layer 8 is arranged on the periphery of the silencing assembly 7, and the sound insulation layer 8 can be a sound insulation material coating layer formed by simply coating sound insulation materials.

Referring to fig. 2, the silencing assembly 7 is in a circular tube shape, the silencing assembly 7 comprises an output tube 711 and a silencing outer sleeve 71, a silencing annular cavity is defined between the silencing outer sleeve 71 and the output tube 711, as a preferred embodiment, a shoulder 72 is arranged on the periphery of one end of the output tube 711, an inner hole of the silencing outer sleeve 71 is a step hole corresponding to the periphery of the output tube 711 and the shoulder 72 thereof, and a silencing annular cavity is defined between the step hole of the silencing outer sleeve 71 and the periphery of the output tube 711 and the shoulder 72 thereof; the inner wall of the output pipe 711 is a circular hole wall with the diameter corresponding to that of the inner hole of the output interface disc 10, the inner wall of the output pipe 711 is provided with a throttling convex ring 710 with a trapezoidal or circular arc-shaped cross section, the cross section of the throttling convex ring 710 is in a trapezoidal or circular arc shape with bilateral symmetry, the pipe walls of the output pipe 711 at two sides of the throttling convex ring 710 are provided with output pipe through holes 79, the aperture of the output pipe through holes 79 is 5-15 mm, the perforation rate of the perforated section of the output pipe 711 is 15% -30%, and the perforated section is the section of the pipe wall provided with the through holes; a separating pipe 77 is arranged in a silencing ring cavity at the periphery of the output pipe 711, ring grooves 73 corresponding to the positions of the separating pipe 77 are respectively arranged on the inner side of a convex shoulder 72 of the output pipe 711 and the bottom of a step hole of the silencing outer sleeve 71, two ends of the separating pipe 77 are respectively inserted into the corresponding ring grooves 73 on the output pipe 711 and the silencing outer sleeve 71, a separating pipe through hole 74 is arranged on the pipe wall of the separating pipe 77, the aperture of the separating pipe through hole 74 is 5-15 mm, the perforation rate of a perforated section of the separating pipe 77 is 15% -30%, and the perforated section is a section of the pipe wall provided with the perforated hole; an expansion cavity 712 is formed between the separating pipe 77 and the output pipe 711, a cavity formed between the separating pipe 77 and the noise elimination jacket 71 is axially divided into a plurality of energy storage cavities 76, energy storage air bags 78 are arranged in the energy storage cavities 76, as a preferred embodiment, the cavity formed between the separating pipe 77 and the noise elimination jacket 71 is axially divided into two to three energy storage cavities 76 through a separating ring sheet 75, and the energy storage air bags 78 are inflatable soft rubber air bags; the two ends of the noise elimination sleeve 71 are provided with connecting flanges 713, the flange 3 arranged on the valve body 2 and the output interface disc 10 corresponds to the connecting flanges 713, and the valve body 2, the noise elimination sleeve 71 and the output interface disc 10 are mutually connected through the corresponding connecting flanges 713 and the flange 3 by connecting bolts.

The above description has been presented only for the purpose of illustrating certain preferred embodiments of the invention, and it is not to be taken as a limitation on the invention, as many modifications and variations are possible. Any improvement and change made on the basis of the basic principle of the present invention should be considered as falling within the protection scope of the present invention.

Claims

1. The utility model provides a modular low noise butterfly valve, includes valve body (2), installs disk seat (4) and valve rod (5) on valve body (2), installs valve disc (6) on valve rod (5), is equipped with input interface dish (1), its characterized in that at the input side of valve body (2): at least one noise elimination assembly (7) is connected to the side face, close to the valve seat (4), of the output side of the valve body (2), the outer end of the outermost noise elimination assembly (7) is connected with an output interface disc (10), and elastic sealing gaskets (9) are arranged between the valve body (2) and the noise elimination assembly (7), between the adjacent noise elimination assemblies (7) and between the noise elimination assembly (7) and the output interface disc (10); the noise elimination assembly (7) comprises an output pipe (711) and a noise elimination outer sleeve (71), a noise elimination annular cavity is defined between the noise elimination outer sleeve (71) and the output pipe (711), a throttling convex ring (710) with a trapezoidal or circular arc-shaped section is arranged on the inner wall of the output pipe (711), and output pipe through holes (79) are formed in the pipe walls of the output pipe (711) on the two sides of the throttling convex ring (710); a separation pipe (77) is arranged in a silencing ring cavity at the periphery of an output pipe (711), an expansion cavity (712) is formed between the separation pipe (77) and the output pipe (711), a cavity formed between the separation pipe (77) and a silencing outer sleeve (71) is axially divided into a plurality of energy storage cavities (76), an energy storage air bag (78) is arranged in each energy storage cavity (76), and a separation pipe through hole (74) is formed in the pipe wall of the separation pipe (77).

2. The modular low noise butterfly valve of claim 1, wherein: a shoulder (72) is arranged on the periphery of one end of the output pipe (711), an inner hole of the silencing outer sleeve (71) is a step hole corresponding to the periphery of the output pipe (711) and the shoulder (72) of the output pipe, and a silencing annular cavity is defined between the step hole of the silencing outer sleeve (71) and the periphery of the output pipe (711) and the shoulder (72) of the output pipe.

3. The modular low noise butterfly valve of claim 1, wherein: the section of the throttling convex ring (710) is in a trapezoidal or circular arc shape with bilateral symmetry.

4. The modular low noise butterfly valve of claim 1, wherein: the aperture of the output pipe perforation (79) and the aperture of the separation pipe perforation (74) are both 5-15 mm; the perforation rate of the perforated section of the output pipe (711) is 15% -30%; the perforation rate of the perforated section of the separating tube (77) is between 15% and 30%.

5. The modular low noise butterfly valve of claim 1, wherein: and annular grooves (73) corresponding to the positions of the separating pipes (77) are respectively formed in the inner sides of the convex shoulders (72) of the output pipes (711) and the bottoms of the stepped holes of the silencing outer sleeves (71), and the two ends of the separating pipes (77) are respectively inserted into the corresponding annular grooves (73) of the output pipes (711) and the silencing outer sleeves (71).

6. The modular low noise butterfly valve of claim 1, wherein: the cavity formed between the separating pipe (77) and the silencing outer sleeve (71) is axially divided into two to three energy storage cavities (76) by a separating ring sheet (75).

7. The modular low noise butterfly valve of claim 1, wherein: the energy storage air bag (78) is an inflatable soft rubber air bag.

8. The modular low noise butterfly valve of claim 1, wherein: connecting flanges (713) are arranged at two ends of the silencing outer sleeve (71), and flange plates (3) corresponding to the connecting flanges (713) are arranged on the valve body (2) and the output interface disc (10).

9. The modular low noise butterfly valve of claim 1, wherein: and a sound insulation layer (8) is arranged on the periphery of the sound attenuation component (7).

10. The modular low noise butterfly valve of claim 9, wherein: the sound insulation layer (8) is a sound insulation material coating layer.