CN217898818U

CN217898818U - Butterfly valve with built-in porous silencing self-damping structure

Info

Publication number: CN217898818U
Application number: CN202221893289.0U
Authority: CN
Inventors: 张希恒; 陈新超; 夏志明; 孙帅军; 毛伟; 沈佳俊
Original assignee: Lanzhou University of Technology; Bray China Control System Co Ltd
Current assignee: Lanzhou University of Technology; Bray China Control System Co Ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2022-11-25
Anticipated expiration: 2032-07-20

Abstract

The application discloses butterfly valve of built-in porous noise elimination self-damping structure, including valve body, valve rod and dish board, the both ends of valve rod respectively with the valve body rotates the cooperation together, the dish board is fixed in on the valve rod, still include connecting rod, cylinder body, piston and cock stem, the piston slide set up in the damping intracavity of cylinder body, and the piston pastes the chamber wall in tight damping chamber, the cock stem is fixed in on the piston, and the both ends of cock stem are located the cylinder body respectively inside and outside, the both ends of connecting rod respectively with the articulated cooperation of cock stem and dish board is in the same place, and the connecting rod is located outside the cylinder body, and the cylinder body is fixed in the valve body, be provided with the damping through-hole on the cylinder body, just the damping through-hole is located the chamber wall in damping chamber. The utility model discloses following beneficial effect has: the vibration and noise caused by the water flowing out can be reduced, and the water hammer phenomenon is reduced.

Description

Butterfly valve with built-in porous silencing self-damping structure

Technical Field

The utility model relates to a valve field especially relates to a butterfly valve of built-in porous noise elimination self-damping structure.

Background

The butterfly valve is a partially driven valve, rotates 90 degrees to open and close, and is mainly suitable for controlling the cut-off and regulation of pipeline fluid. The butterfly valve has small flow resistance, large flow capacity and high opening and closing speed, and is widely applied to large-scale hydroelectric systems and water supply systems. In some water supply system pipelines (the flow is relatively large, the lift is relatively long), because of factors such as power loss and the like, a butterfly valve is closed instantly, water hammer is easily formed due to rapid change of the flow rate of liquid in the valve, severe impact, vibration and noise occur to the pipeline, even the sealing element fails, bursting of the butterfly valve and the pipeline can be caused, and the service life of the valve is influenced, so that a large-scale hydraulic station is usually established in a pump room, a hydraulic damping mechanism is arranged outside a valve body, the butterfly valve is provided with damping at a stroke terminal, the damping effect can be achieved to a certain extent, and the damage of the water hammer to the butterfly valve and the pipeline is prevented and reduced. However, in the actual working process, the external damping mechanisms of many butterfly valves cannot reasonably control the closing speed of the butterfly plate, and even the hydraulic station stops working due to sudden power loss of the pump room valve, and the external damping mechanisms of the butterfly valves lose functions and cannot prevent the water machine. For some pipelines with large flow, the damping hole structure of the damping mechanism arranged outside is unreasonable, so that the damping structure generates impact, vibration and noise. In addition, set up the damping structure in the butterfly valve outside, the pump valve constructs the hydraulic pressure station, has increased the construction cost in pump house.

SUMMERY OF THE UTILITY MODEL

Based on the problem that proposes in the background art, the utility model discloses utilize the viscidity of working fluid, at the inside liquid that sets up of butterfly valve body from the damping cavity structure, prolong the close time of valve, prevent that water hammer, damping structure that the butterfly valve arouses at pump house power loss etc. from producing phenomena such as impact, vibration and noise, reduce pump house construction cost, guarantee pump house and pipe-line system's safe operation.

The utility model provides an above-mentioned problem, provide a butterfly valve of built-in porous noise elimination self-damping structure.

The utility model discloses the technical scheme who takes as follows:

the utility model provides a butterfly valve of built-in porous noise elimination self-damping structure, includes valve body, valve rod and dish board, the both ends of valve rod respectively with the valve body rotates the cooperation and is in the same place, the dish board is fixed in on the valve rod, still include connecting rod, cylinder body, piston and gag lever post, the piston slide set up in the damping cavity of cylinder body, and the chamber wall of tight damping cavity is pasted to the piston, the gag lever post is fixed in on the piston, and the both ends of gag lever post are located the cylinder body respectively inside and outside, the both ends of connecting rod respectively with gag lever post and the articulated cooperation of dish are in the same place, and the connecting rod is located outside the cylinder body, and the cylinder body is fixed in the valve body, be provided with the damping through-hole on the cylinder body, just the damping through-hole is located the chamber wall in damping cavity.

In the butterfly valve of this kind of structure, owing to at the cylinder body, piston and cock stem have formed a liquid damping pole, owing to set up damping through hole on the cylinder body, damping through hole UNICOM damping chamber, and the piston removes in the damping chamber, when liquid flow changes in the valve body, can let the liquid volume and the liquid velocity of flow through damping through hole flow through damping chamber change, the cylinder body, cock stem and piston have formed a attenuator, the state of this attenuator is by the liquid flow and the velocity of flow adjustment in the valve body. The existence of this attenuator can ensure to carry out certain deceleration to the liquid that flows through the valve body in the use, and liquid has reduced the translation rate of piston after through a plurality of damping through-holes, and the piston will move and pass through round pin axle, connecting rod connection, fixing base transmission for the butterfly plate to the rotation rate of control butterfly plate reduces or even eliminates butterfly valve water hammer phenomenon, can reduce vibrations and the produced noise of reduction rivers when rivers flow out simultaneously.

In conclusion, the butterfly valve has the advantages that the cylinder body, the piston and the plug rod with the damping through holes are arranged in the valve body, the damping mechanism is formed in the valve body of the butterfly valve, the working condition of the damping mechanism is influenced by the liquid flow and the flow speed in the valve body, the vibration and the noise caused when water flows out can be reduced, and the water hammer phenomenon is reduced.

Optionally, the disc type air conditioner further comprises a fixed seat, the fixed seat is arranged on the disc plate, and the connecting rod is hinged to the fixed seat.

Optionally, the two ends of the connecting rod are provided with pin shafts, and the connecting rod is in hinged fit with the plug rod and the disc plate through the pin shafts.

Optionally, a plurality of damping through holes are arranged on the cylinder body.

The plurality of damping through holes reduce the impact pressure of the damping cavity and eliminate vibration and noise generated by high-speed flow of liquid; meanwhile, the moving speed of the piston is reduced after the liquid passes through the damping through holes.

Optionally, a cylinder cover and a cylinder seat are arranged on the cylinder body, and the cylinder body is fixed on the inner wall of the valve body through the cylinder seat.

Optionally, a bracket is arranged on the outer wall surface of the valve body.

Optionally, a filler is arranged between the valve rod and the valve body, a pressing sleeve is fixed on the valve body through a pressing plate, and the pressing sleeve is tightly attached to the filler.

Optionally, the filler includes a first filler and a second filler, the pressure plate includes a first pressure plate and a second pressure plate, the pressure sleeve includes a first pressure sleeve and a second pressure sleeve, the first filler, the first pressure plate and the first pressure sleeve are located on one side of the valve rod, and the second filler, the second pressure plate and the second pressure sleeve are located on the other side of the valve rod.

The utility model has the advantages that: through set up cylinder body, piston and the cock stem of taking the damping through-hole in the valve body, formed a damping mechanism in the valve body of butterfly valve, this damping mechanism's operating mode receives the influence of liquid flow and velocity of flow in the valve body, can reduce vibrations and the noise that causes when water flows out, reduces the water hammer phenomenon.

Description of the drawings:

FIG. 1 is a schematic diagram of a butterfly valve with a built-in porous sound-damping self-damping structure;

FIG. 2 is a schematic view of the connection between the disc plate and the porous sound-damping mechanism;

FIG. 3 is a schematic diagram of a porous muffling self-damping mechanism;

FIG. 4 is a schematic view of the butterfly valve opening damping state;

FIG. 5 is a schematic view of a non-damped state of the butterfly valve closing process;

FIG. 6 is a schematic view of the damping state during closing of the butterfly valve.

The figures are numbered: 1. a valve body; 2. a plate; 3. a valve stem; 4. a cylinder base; 5. a cylinder body; 6. a stopper rod; 7. a cylinder cover; 8. a first pin shaft; 9. a connecting rod; 10. a second pin shaft; 11. a fixed seat; 12. a screw; 13. a first platen; 14. a first pressing sleeve; 15. a first filler; 16. a pin; 17. a second filler; 18. a second pressing sleeve; 19. a second platen; 20. and (4) a bracket.

The specific implementation mode is as follows:

the present invention will be described in detail with reference to the accompanying drawings.

It should be noted that fig. 1 isbase:Sub>A schematic diagram of the butterfly valve in an open state on the left side in fig. 1,base:Sub>A schematic diagram of the butterfly valve inbase:Sub>A closed state on the right side in fig. 1, andbase:Sub>A schematic diagram of the left side in fig. 3 isbase:Sub>A sectional diagram of the butterfly valve in the direction ofbase:Sub>A-base:Sub>A of the right side.

The embodiment applies an internal porous silencing self-damping structure of a butterfly valve designed by acoustic knowledge and fluid mechanics related theories, and is shown in figures 1 and 2, a valve rod 3 is installed in a valve body 1 in a rotating mode, two ends of the valve rod 3 are respectively embedded into the valve body 1 and are respectively matched with the valve body 1 in a rotating mode, and a butterfly plate 2 is arranged, and the butterfly plate 2 is in contact with a valve seat of the valve body 1 to achieve butterfly valve sealing. The valve rod 3 drives the butterfly plate 2 to rotate 90 degrees, so that the butterfly plate is opened and closed. The packing holes at two ends of the valve body 1 are respectively filled with a first packing 15 and a second packing 17, the first pressing plate 13 and the second pressing plate 19 respectively apply pressing force to the first pressing sleeve 14 and the second pressing sleeve 18, and the first pressing sleeve 14 and the second pressing sleeve 18 respectively apply pressing force to the first packing 15 and the second packing 17 to seal the valve rod 3. The bracket 20 is fixed on the valve body 1 and connected with a driving structure.

Damping structure part as shown in fig. 2, the cylinder block 4 fixes the whole damping structure in the valve body 1 by a pin 16. The cylinder body is respectively sealed from two ends by the cylinder seat 4 and the cylinder cover 7, the piston and the plug rod 6 are arranged in a damping cavity in the cylinder body 5, and the cylinder body is sealed by the cylinder seat 4 and the cylinder cover 7. Different volumes are formed in the compression cylinder 5 along with the movement of the piston and the plug rod 6 to push damping medium (namely liquid, generally water) to flow out of the damping through holes, and the fluid speed of the damping through holes restrains the moving speed of the piston and the plug rod 6, so that the damping effect is realized.

One end of the plug rod 6 is connected with the connecting rod 9 through the first pin shaft 8, the other end of the connecting rod 9 is connected with the fixed seat 11 through the second pin shaft 10, and the fixed seat 11 is connected with the butterfly plate through the screw 12. The cylinder body 5 is provided with a plurality of damping through holes, the impact pressure of the damping cavity is reduced through the plurality of damping through holes, and vibration and noise generated by high-speed flow of a damping medium are eliminated; meanwhile, the movement speed of the piston is reduced after the damping medium passes through the damping through holes, and the piston transfers the movement to the butterfly plate through the pin shaft, the connecting rod 9 and the fixing seat 11, so that the rotation speed of the butterfly plate is controlled, and the water hammer of the butterfly valve is reduced and eliminated.

As shown in figure 3, the cylinder body 5 is provided with four windows, and as shown in the A-A view, the area of the four windows is larger than the cross-sectional area of the inner cavity of the cylinder body 5. The damping cavity of the cylinder body 5 is communicated with the flow channel of the valve body 1, the valve flow channel medium is the damping medium, medium self-damping is realized, an external hydraulic station is not required to be arranged, and the construction cost of a pump station is greatly reduced.

As shown in fig. 3, the wall surface of the cylinder 5 is provided with a plurality of damping through holes, and the area of the plurality of damping through holes is far smaller than the cross-sectional area of the inner cavity of the cylinder 5. The piston and the plug rod 6 push the liquid medium to enter the valve body flow channel through the damping through holes, the flow speed of the liquid medium in the damping cavity is reduced, the moving speed of the piston and the plug rod 6 is reduced, the rotating speed of the butterfly valve 2 is reduced, the effect of damping the movement of the butterfly plate 2 is achieved, and water attack of the butterfly valve is prevented. Meanwhile, the medium passes through a plurality of damping through holes, and vibration and noise are reduced or even eliminated relative to one damping through hole.

Referring to fig. 4 and 5, when the valve rod 3 of the butterfly valve drives the butterfly plate to close the valve from counterclockwise rotation to the end, the piston and the plug rod 6 move from the section 1-1 to the section 2-2, the cavity formed by the piston and the plug rod 6 and the cylinder body 5 is communicated with the flow channel of the valve body 1, and the liquid medium has no damping effect on the piston and the plug rod 6, so that the first-step rapid closing of the butterfly plate 2 is realized.

Referring to the attached

drawings

5 and 6, the butterfly valve rotates counterclockwise continuously from the tail end to close the valve, the piston and the plug rod 6 move from the section 2-2 to the section 3-3, a cavity formed by the piston and the plug rod 6 and the cylinder 5 is not communicated with a flow channel of the valve body 1, a liquid medium is sealed in the cavity formed by the piston and the plug rod 6 and the cylinder 5, the piston and the plug rod 6 push the liquid medium to flow out from the damping through holes of the cylinder 5, the areas of the damping through holes of the cylinder base 5 are far smaller than the cross section area of the cylinder 5, the flow area of the liquid medium is suddenly reduced when the liquid medium enters the small hole from the large hole, the fluid resistance of the damping through holes of the cylinder 5 is increased, the moving speed of the piston and the plug rod 6 is reduced under the combined action of the viscosity of the liquid medium, the rotating speed of the butterfly plate is also reduced, and the second-step slow closing of the butterfly plate 2 is realized. The time for closing the butterfly plate slowly is less than the speed of the water shock wave of the liquid medium, so that the water shock of the butterfly valve is reduced or eliminated.

The above only is the preferred embodiment of the present invention, and not therefore the patent protection scope of the present invention is limited, and all the equivalent transformations made by the contents of the present invention are directly or indirectly applied to other related technical fields, and are included in the protection scope of the present invention.

Claims

1. The utility model provides a butterfly valve of built-in porous noise elimination self-damping structure, includes valve body, valve rod and dish board, the both ends of valve rod respectively with the valve body rotates the cooperation and is in the same place, the dish board is fixed in on the valve rod, its characterized in that still includes connecting rod, cylinder body, piston and gag lever post, the piston slide set up in the damping intracavity of cylinder body, and the chamber wall in tight damping chamber is pasted to the piston, the gag lever post is fixed in on the piston, and the both ends of gag lever post are located the cylinder body respectively inside and outside, the both ends of connecting rod respectively with gag lever post and the articulated cooperation of dish board are in the same place, and the connecting rod is located the cylinder body outside, and the cylinder body is fixed in the valve body, be provided with damping through-hole on the cylinder body, just damping through-hole is located the chamber wall in damping chamber.

2. The butterfly valve with a built-in porous sound-damping self-damping structure according to claim 1, further comprising a fixing seat, wherein the fixing seat is arranged on the disk plate, and the connecting rod is hinged and matched with the fixing seat.

3. The butterfly valve with built-in porous silencing self-damping structure as set forth in claim 1, wherein said connecting rod is provided at both ends with pins, and said connecting rod is hinge-fitted with said plug rod and said disk plate through said pins.

4. The butterfly valve with a built-in porous sound-deadening self-damping structure according to claim 1, wherein a plurality of damping through holes are provided in the cylinder body.

5. The butterfly valve with a built-in porous silencing self-damping structure as claimed in claim 1, wherein a cylinder cover and a cylinder seat are arranged on the cylinder body, and the cylinder body is fixed on the inner wall of the valve body through the cylinder seat.

6. The butterfly valve with a built-in porous sound-deadening self-damping structure according to claim 1, wherein a bracket is provided on an outer wall surface of the valve body.

7. The butterfly valve with a built-in porous silencing self-damping structure as claimed in claim 1, wherein a packing is arranged between the valve stem and the valve body, a pressing sleeve is fixed on the valve body through a pressing plate, and the pressing sleeve is tightly attached to the packing.

8. The butterfly valve with built-in porous sound-damping self-damping structure of claim 7, wherein the packing comprises a first packing and a second packing, the pressure plate comprises a first pressure plate and a second pressure plate, the pressure sleeve comprises a first pressure sleeve and a second pressure sleeve, the first packing, the first pressure plate and the first pressure sleeve are located on one side of the valve stem, and the second packing, the second pressure plate and the second pressure sleeve are located on the other side of the valve stem.