CN217898817U

CN217898817U - Butterfly valve with built-in turbulence multi-taper hole critical self-damping structure

Info

Publication number: CN217898817U
Application number: CN202221890809.2U
Authority: CN
Inventors: 张希恒; 陈新超; 周义; 章达; 毛伟; 范文彬
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 critical butterfly valve from damping structure of built-in many taper holes of torrent, 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 chamber wall in tight damping chamber is pasted to the piston, 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 damping hole and damping taper hole on the cylinder body, just damping hole and damping taper hole all are located the chamber wall in damping chamber, and damping hole and damping taper hole are located the both sides of piston respectively.

Description

Butterfly valve with built-in turbulence multi-taper hole critical self-damping structure

Technical Field

The utility model relates to a valve field especially relates to a butterfly valve of built-in torrent polywimble Kong Linjie self-damping structure.

Background

The butterfly valve is a valve which is important in part, and a disc plate of the butterfly valve rotates 90 degrees to open and close, and is mainly suitable for controlling the cut-off and adjustment 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, because butterfly valves are closed instantly due to factors such as power loss, water hammer is easy to form due to rapid change of liquid flow rate in the valves, severe impact, vibration and noise occur to the pipelines, even sealing elements are disabled, the butterfly valves and the pipelines burst, and the service life of the valves is influenced.

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 a large-flow pipeline, a damping hole of a damping mechanism arranged outside the large-flow pipeline is unreasonable in structure, so that the impact pressure of a damping cavity is too high, and cavitation vibration and noise are generated in the damping hole. 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

The utility model provides a to above-mentioned problem, provide a butterfly valve of the critical self-damping structure of many taper holes of built-in torrent.

The utility model adopts the following technical scheme:

the utility model provides a butterfly valve of critical self-damping structure of many taper holes of built-in torrent, includes 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 gag lever post, the piston slide set up in the damping intracavity of cylinder body, and the chamber wall of 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 hole and damping taper hole on the cylinder body, just damping hole and damping taper hole all are located the chamber wall in damping chamber, and damping taper hole are located the both sides of piston respectively.

In this kind of butterfly valve, through adopting the cylinder body of taking damping hole and damping taper hole, then sliding seal has installed the piston in the cylinder body, the liquid that flows through the valve body can pass in and out via damping hole and damping taper hole, so the cylinder body, piston and cock stem have formed the attenuator that utilizes liquid self power in the valve body, so this kind of butterfly valve is equivalent to installing the attenuator in the valve body, this kind of attenuator of installing in the valve body can play certain hysteresis cushioning effect to the rotation of dish board, can ensure to carry out certain deceleration to the liquid that flows through the valve body in the use, liquid has reduced the removal speed of piston after passing through the attenuator, the piston will move through the round pin axle, the connecting rod is connected, the fixing base transmits the butterfly board, thereby control the rotational speed of butterfly board, reduce or even eliminate butterfly valve water hammer phenomenon, can reduce vibrations and the noise that rivers produced when rivers go out simultaneously.

In conclusion, the cylinder body, the piston and the plug rod with the damping holes and the damping taper holes are arranged in the valve body of the butterfly valve, the damper is formed in the valve body of the butterfly valve, the working condition of the damper is affected by the liquid flow and the flow speed in the valve body, the vibration and the noise caused by water flowing 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 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, the damping holes are four, the four damping holes are distributed on the cylinder body in an equidistant equal radian mode, and the number of the damping taper holes is larger than that of the damping holes.

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 damping hole and damping taper hole in the valve body, formed a attenuator in the valve body of butterfly valve, the operating mode of this attenuator 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 turbulent multi-cone critical self-damping structure;

FIG. 2 is a schematic diagram of the connection relationship between the dish plate and the turbulence multi-cone Kong Linjie self-damping structure;

FIG. 3 is a schematic diagram of a turbulent multi-cone critical self-damping structure;

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

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

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

The various reference numbers in the figures are: 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 presser plate; 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. a support; 21. a damping hole; 22. and damping taper holes.

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 the built-in porous silencing self-damping structure of the butterfly valve designed by the acoustic knowledge and the fluid mechanics related theory, and as shown in the attached drawings 1 and 2, a valve rod 3 is rotatably installed in a valve body 1, two ends of the valve rod 3 are respectively embedded into the valve body 1 and are respectively rotatably matched with the valve body 1, and a butterfly plate 2 is arranged, and the butterfly plate 2 is contacted with a valve seat of the valve body 1 to realize butterfly valve sealing. The valve rod 3 drives the butterfly plate 2 to rotate 90 degrees, and 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.

As shown in FIG. 3, the turbulent multi-taper-hole critical self-damping structure mainly comprises a cylinder seat 4, a cylinder body 5, a piston and a plug rod 6 and a cylinder cover 7. The piston and the plug rod 6 are mounted in a damping chamber of the cylinder 5, which is divided by the piston as the piston and the plug rod 6 move. The cylinder block 4 fixes the cylinder block 5 to the valve body 1 by a pin 16. The cylinder seat 4 and the cylinder cover 7 block the cylinder body 5, one end of the piston and one end of the plug rod 6 are 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 holes 21 and damping taper holes 22, the damping holes 21 and the damping taper holes 22 are respectively positioned at two sides of the piston, a liquid medium presents a turbulent flow state through the damping taper holes, the pressure of the damping holes is critical pressure, the impact pressure of a damping cavity is reduced to the maximum extent, and cavitation vibration and noise when the liquid flows through the cylinder body are eliminated; meanwhile, the movement speed of the piston is reduced after the liquid passes through the damping taper holes, and the piston transfers the movement to the butterfly plate through the first pin shaft 8, the connecting rod 9 and the fixing seat 11, so that the rotation speed of the butterfly plate 2 is controlled, and the water hammer of the butterfly valve is reduced and eliminated.

As shown in fig. 3, four damping holes 21 are formed in the cylinder 5, and as shown inbase:Sub>A viewbase:Sub>A-base:Sub>A on the left side of fig. 3, the areas of the four damping holes 21 are larger than the sectional area of the inner cavity of the cylinder 5. The damping cavity of the cylinder body 5 is communicated with the flow channel of the valve body 1, the medium of the flow channel of the valve is the damping medium, the 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 taper holes 22, and the area of the plurality of damping taper 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 taper holes 22, 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 plate 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. The liquid medium presents a turbulent flow state through the plurality of damping taper holes, the pressure of the damping holes is critical pressure, the impact pressure of the damping cavity is reduced to the maximum extent, and the cavitation vibration and noise of the damping medium are eliminated.

The whole damping structure can work as shown in figures 4, 5 and 6,

as can be seen from the figures 4 and 5, when the valve rod 3 of the butterfly valve drives the butterfly plate to close the valve from anticlockwise rotation to the tail 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 butterfly plate 2 is quickly closed.

As can be seen from the figures 5 and 6, the butterfly plate 2 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, the cavity formed by the piston and the plug rod 6 and the cylinder 5 is not communicated with the flow channel of the valve body 1, the 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 holes of the cylinder 5, the area of the damping holes of the cylinder base 5 is far smaller than the cross section area of the cylinder 5, the fluid resistance of the damping holes of the cylinder 5 is increased due to the sudden reduction of the flow area when the liquid medium enters the small holes from the large holes, 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 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 critical self-damping structure of many taper holes of built-in torrent in 1 runner of valve body of butterfly valve, the damping structure passes through screw 12 and valve body 1 connection, butterfly plate 2 sets up fixing support, through first round pin axle 8 and second round pin axle 11, connecting rod 9 is connected with damping structure's piston and cock stem 6, butterfly plate 2 is through first round pin axle 8 and second round pin axle 11, connecting rod 9 and damping structure give piston and cock stem 6 with the motion transmission, piston and 6 removals of cock stem promote liquid medium and flow out from a plurality of damping holes, utilize the viscidity of valve runner medium to realize the butterfly valve damping. At the initial closing stage, the damping cavity of the cylinder body 5 is communicated with the flow channel of the valve body 1, the piston and the plug rod 6 are undamped, and the butterfly valve is closed quickly. At the closing stage of the butterfly valve end, the damping cavity of the cylinder body 5 is not communicated with the flow channel of the valve body 1, the liquid medium flows out from the damping hole of the cylinder body 5 under the pushing of the piston and the plug rod 6, the moving speed of the piston and the plug rod 6 is reduced, the rotating speed of the butterfly plate 2 is also reduced, and the closing time of the butterfly plate 6 is shorter than the water hammer speed of the liquid medium, so that the water hammer of the butterfly valve is reduced or eliminated. Adopt the structure that this application provided, the intercommunication of its built-in damping structure's cylinder body 5 and valve runner realizes the butterfly valve runner medium as the liquid of damping structure, has realized the self-damping of medium, need not the pump valve and sets up hydraulic pressure station, has reduced the construction cost. The plurality of damping taper holes 22 designed on the cylinder body 5 reasonably control the closing speed of the butterfly plate 2, and slow down and eliminate the water hammer phenomenon of the valve. The fluid medium presents a turbulent flow state through a plurality of damping taper holes 22 designed on the cylinder body 5, the pressure of the damping holes 21 is critical pressure, the impact pressure of the damping cavity is reduced to the maximum extent, and the cavitation vibration and noise of the damping holes 21 are eliminated. Through the communication and the sealing of a plurality of damping holes 21 designed on the cylinder body 5 and the valve flow passage, the process from quick closing to slow closing of the butterfly valve is realized, and the water hammer of the pipeline is slowed down and eliminated. The service life of the valve is prolonged, the construction cost of the pump room is reduced, and the safe operation of the pump room and a pipeline system is ensured.

In the specific embodiment, four damping holes 21 are arranged on the cylinder body, the damping taper holes 22 are arranged in a cone frustum shape, wide orifices of the damping taper holes 22 are positioned in the cylinder body 5, narrow orifices of the damping taper holes 22 are positioned outside the cylinder body 5, the number of the damping holes 21 is four, the damping holes are distributed in an equal radian manner at equal intervals, the number of the damping taper holes 22 is 12-16, and the orifice area of each damping taper hole is smaller than that of the damping hole 21.

The above only is the preferred embodiment of the present invention, not therefore the limitation of the patent protection scope of the present invention, all applications the equivalent transformation made by the content of the specification of the present invention, directly or indirectly applied to other related technical fields, all included in the protection scope of the present invention.

Claims

1. The utility model provides a butterfly valve of critical self-damping structure of many taper holes of built-in torrent, includes 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, its characterized in that still includes connecting rod, cylinder body, piston and cock stem, the piston slide set up in the damping intracavity of cylinder body, and the chamber wall of piston laminating 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 cock stem and the articulated cooperation of dish board 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 damping hole and damping taper hole on the cylinder body, just damping hole and damping taper hole all are located the chamber wall in damping chamber, and damping taper hole are located the both sides of piston respectively.

2. The butterfly valve with built-in turbulent flow multi-taper hole critical self-damping structure as claimed in claim 1, further comprising a fixing seat, wherein the fixing seat is arranged on the plate, and the connecting rod is hinged with the fixing seat.

3. The butterfly valve with built-in turbulent flow multi-taper hole critical self-damping structure as claimed in claim 1, wherein the connecting rod is provided with pins at both ends, and the connecting rod is hinged with the plug rod and the butterfly plate through the pins.

4. The butterfly valve with built-in turbulent multi-taper hole critical self-damping structure as claimed in claim 1, wherein said cylinder body is provided with a cylinder cover and a cylinder seat, and said cylinder body is fixed on the inner wall of said valve body through said cylinder seat.

5. The butterfly valve with built-in turbulent flow multi-taper hole critical self-damping structure as claimed in claim 1, wherein said four damping holes are equally distributed on the cylinder body in an arc shape, and the number of said damping taper holes is larger than the number of said damping holes.

6. The butterfly valve with built-in turbulent multi-taper hole critical self-damping structure as claimed in claim 1, wherein a support is provided on the outer wall surface of the valve body.

7. The butterfly valve with a built-in turbulent flow multi-taper hole critical 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 turbulence multi-cone Kong Linjie self-damping structure of claim 7, wherein said packing comprises a first packing and a second packing, said pressure plate comprises a first pressure plate and a second pressure plate, said pressure sleeve comprises a first pressure sleeve and a second pressure sleeve, said first packing, first pressure plate and first pressure sleeve are located on one side of a valve stem, and said second packing, second pressure plate and second pressure sleeve are located on the other side of the valve stem.