CN115234663A - Butterfly valve with built-in Archimedes spiral line cavitation-free self-damping mechanism - Google Patents

Butterfly valve with built-in Archimedes spiral line cavitation-free self-damping mechanism Download PDF

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Publication number
CN115234663A
CN115234663A CN202210868178.2A CN202210868178A CN115234663A CN 115234663 A CN115234663 A CN 115234663A CN 202210868178 A CN202210868178 A CN 202210868178A CN 115234663 A CN115234663 A CN 115234663A
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CN
China
Prior art keywords
damping
archimedes spiral
valve
cylinder body
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210868178.2A
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Chinese (zh)
Inventor
陈新超
张希恒
周凌峰
毛伟
李辉文
俞林伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lanzhou University of Technology
Bray China Control System Co Ltd
Original Assignee
Lanzhou University of Technology
Bray China Control System Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lanzhou University of Technology, Bray China Control System Co Ltd filed Critical Lanzhou University of Technology
Priority to CN202210868178.2A priority Critical patent/CN115234663A/en
Publication of CN115234663A publication Critical patent/CN115234663A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Lift Valve (AREA)
  • Details Of Valves (AREA)

Abstract

The application discloses built-in Archimedes spiral does not have cavitation from damping mechanism's butterfly valve, including 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 cock stem, the piston slide set up in the damping chamber of cylinder body, and the wall of piston paste 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 damping orifice and Archimedes spiral hole on the cylinder body, just damping orifice and Archimedes spiral hole all are located the chamber wall in damping chamber, and damping orifice and Archimedes spiral hole are located the both sides of piston respectively, the narrow mouth end in intercommunicating Archimedes spiral hole and the valve body with the damping chamber communicates.

Description

Butterfly valve with built-in Archimedes spiral line cavitation-free self-damping mechanism
Technical Field
The invention relates to the field of valves, in particular to a butterfly valve with an Archimedes spiral line built-in cavitation-free self-damping mechanism.
Background
The butterfly valve is a partially driven valve, is opened and closed by rotating by 90 degrees and is mainly suitable for controlling the interception and regulation of pipeline fluid. The butterfly valve has small flow resistance, large flow capacity, simple structure and high opening and closing speed, and is widely applied to large 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 hydraulic station stops working due to sudden power loss of the pump room valve, and in addition, the damping structure is arranged outside the butterfly valve, the pump valve builds the hydraulic station, and the construction cost of the pump room is increased.
Disclosure of Invention
The invention provides a butterfly valve with an built-in Archimedes spiral line cavitation-free self-damping mechanism aiming at the problems.
The technical scheme adopted by the invention is as follows:
the utility model provides a butterfly valve of built-in Archimedes spiral no cavitation self-damping mechanism, 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 cock stem, the piston slide set up in the damping chamber 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 cock stem and dish board hinge fit together, 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 Archimedes spiral hole on the cylinder body, just damping hole and Archimedes spiral hole all are located the chamber wall in damping chamber, and damping hole and Archimedes spiral hole are located the both sides of piston respectively, the runner in intercommunication Archimedes spiral hole and the valve body, the narrow mouth end in Archimedes spiral hole with the damping chamber communicates.
In the butterfly valve, a cylinder body with a damping cavity is arranged in a valve body, a piston is arranged in the cylinder body, damping holes and Archimedes spiral holes are formed in two sides of the piston, liquid flows in the valve body, and therefore when the liquid flows in the valve body, damping media exist on two sides of the piston.
In the butterfly valve with the structure, the disc plate arranged on the valve body can receive damping force brought by the damping action of liquid per se when the butterfly plate is closed, so that the disc plate of the butterfly valve has certain buffering action when the disc plate is closed, and the impact degree of a pipeline, the vibration intensity of the pipeline and the noise of the pipeline are reduced when the disc plate is closed.
Optionally, the shape of the archimedes spiral hole conforms to the equation r = a + b θ, where a and b are real numbers, and when θ =0, a is a distance from the starting point to the origin of the polar coordinate; b = dr/d θ, b being the number of unit angle r per increase in the helix with a corresponding increase.
Optionally, a cylinder cover and a cylinder seat are arranged on the cylinder body, the cylinder body is fixed on the inner wall of the valve body through the cylinder seat, and the Archimedes spiral line hole is formed in the cylinder seat.
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, there are four damping through holes, and the four damping through holes are distributed on the cylinder body in an equal radian at equal intervals.
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 invention has the beneficial effects that: the butterfly plate installed on the valve body can receive damping force brought by the damping action of liquid per se when the butterfly plate is closed, so that the butterfly plate of the butterfly valve has certain buffering action when the butterfly plate is closed, and the impact degree of a pipeline is reduced, the vibration intensity of the pipeline is reduced, and the noise of the pipeline is reduced when the butterfly plate is closed.
Description of the drawings:
FIG. 1 is a schematic diagram of a butterfly valve with built-in Archimedes' spiral non-cavitation self-damping mechanism;
FIG. 2 is a schematic view of the connection between the disc and the damping mechanism without excitation;
FIG. 3 is a schematic illustration of a damping mechanism without shock excitation;
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 of the butterfly valve during closing.
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 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. a support; 21. double damping holes; 22. archimedes spiral wire hole.
The specific implementation mode is as follows:
the present invention will be described in detail below with reference to the accompanying drawings.
It should be noted that fig. 1 isbase:Sub>A schematic diagram of fig. 1 in which the left side is in an open state, and fig. 1 isbase:Sub>A schematic diagram of fig. 1 in which the right side is inbase:Sub>A closed state, the left side of fig. 3 isbase:Sub>A schematic diagram ofbase:Sub>A cross section alongbase:Sub>A-base:Sub>A of the middle diagram, and the right side of fig. 3 isbase:Sub>A schematic diagram ofbase:Sub>A cross section along B-B of the middle diagram.
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.
The self-damping mechanism mainly comprises a cylinder seat 4, a cylinder body 5, a piston, a plug rod 6 and a cylinder cover 7. The piston and the plug rod 6 are installed in the cylinder 5, and a damping chamber with a different volume is formed in the cylinder 5 along with the movement of the piston and the plug rod 6. The cylinder seat 4 fixes the self-damping mechanism on the valve body 1 through a pin 16. The cylinder block is sealed by the cylinder seat 4 and the cylinder cover 7, 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 seat 4 is provided with an Archimedes spiral line hole 22, the movement speed of the piston and the plug rod 6 is changed by controlling the movement speed of fluid through the change of the section shape of the Archimedes spiral line hole 22, the piston and the plug rod 6 transmit the movement to the butterfly plate through the pin shaft 8, the connecting rod 9 and the fixed seat 11, and therefore the rotation speed of the butterfly plate 2 is controlled.
The shape of the Archimedes spiral line hole conforms to the equation r = a + b theta, wherein a and b are real numbers, and when the theta =0, a is the distance from the starting point to the origin of the polar coordinate; b = dr/d θ, b being the number of unit angle r per increment of the helix with a corresponding increase; the section of the Archimedes spiral line hole is gradually enlarged, the pressure is larger than the saturated vapor pressure of the liquid medium after recovery, the damping medium has no cavitation in the flowing process, and impact vibration and noise caused by cavitation water attack can not be generated.
The cylinder body 5 is provided with four damping holes 21, and as shown in the view A-A in FIG. 3, the areas of the four damping holes are larger than the area of the cross section 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 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 can be known from the figures 4 and 5, when the valve rod 3 of the butterfly valve drives the butterfly plate 2 to initially close the butterfly valve by 60 degrees from anticlockwise rotation, the piston and the plug rod 6 move from the section 1-1 to the section 2-2, the damping cavity formed by the piston and the piston rod 6 and the cylinder body 5 is communicated with the flow channel of the valve body 1, the liquid medium has no damping effect on the piston and the piston rod 6, the butterfly plate is quickly closed, and the one-dimensional quick closing movement of the butterfly valve is realized.
As can be known from the figures 5 and 6, the valve rod 3 drives the butterfly plate 2 to rotate anticlockwise continuously from the tail end to close the butterfly valve, the piston and the piston rod 6 move from the section 2-2 to the section 3-3, the damping cavity formed by the piston, the plug rod 6 and the cylinder body 5 is not communicated with the flow channel of the valve body 1, a liquid medium is sealed in the damping cavity formed by the piston, the plug rod 6 and the cylinder body 5, the piston and the plug rod 6 push the liquid medium to flow out from the Archimedes spiral hole 22 of the cylinder base 4, because the area of the Archimedes spiral hole 22 of the cylinder base 4 is far smaller than the cross-sectional area of the cylinder body 5, the flow area of the liquid medium is suddenly reduced when the liquid medium enters a small hole from a large hole, the fluid resistance of the Archimedes spiral hole 22 of the cylinder base 4 is increased, under the combined action of the viscosity of the liquid medium, the moving speed of the piston and the plug rod 6 is reduced, the rotating speed of the butterfly plate 2 is also reduced, the butterfly plate 2 is closed slowly, and the butterfly plate 2 is closed slowly, so that the two-dimensional slow movement of the butterfly valve which is completely closed slowly from the tail end is realized. The slow closing time of the butterfly plate 2 is less than the water shock wave speed of the liquid medium, so that the water shock of the butterfly valve is reduced or eliminated.
The butterfly valve provided by the embodiment utilizes the viscosity of working liquid, and the liquid self-damping cavity structure is arranged in the butterfly valve body, so that the two-dimensional motion of the butterfly plate from quick closing to slow closing is realized, water hammer or cavitation water hammer caused by power failure of the butterfly valve in a pump room and the like is prevented, the cavitation phenomenon of the damping hole is effectively inhibited by the Archimedes spiral damping hole, 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.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention in the specification and other related fields can be directly or indirectly applied to the present invention, and the same shall be included in the scope of the present invention.

Claims (9)

1. The butterfly valve is characterized by further comprising a connecting rod, a cylinder body, a piston and a plug rod, wherein the piston is arranged in a damping cavity of the cylinder body in a sliding mode, the piston is attached to the cavity wall of the damping cavity tightly, the plug rod is fixed on the piston, two ends of the plug rod are located inside and outside the cylinder body respectively, two ends of the connecting rod are respectively hinged and matched with the plug rod and the disc plate together, the connecting rod is located outside the cylinder body, the cylinder body is fixed in the valve body, a damping hole and an Archimedes spiral hole are formed in the cylinder body, the damping hole and the Archimedes spiral hole are located on the cavity wall of the damping cavity, the damping hole and the Archimedes spiral hole are located on two sides of the piston respectively, a flow channel in the Archimedes spiral hole and the valve body is communicated with a flow channel in the Archimedes spiral hole, the narrow end of the Archimedes spiral hole is connected with the end of the damping cavity, and the wide end of the space in the Archimedes spiral hole is communicated with the valve body.
2. The butterfly valve with built-in archimedes spiral cavitation-free self-damping mechanism according to claim 1, wherein the shape of the archimedes spiral hole conforms to the equation r = a + b θ, where a and b are real numbers, and when θ =0, a is the distance from the starting point to the origin of polar coordinates; b = dr/d θ, b being the number of unit angle r per increase in the helix with a corresponding increase.
3. The butterfly valve with built-in Archimedes spiral non-cavitation self-damping mechanism according to claim 1, wherein the cylinder body is provided with a cylinder cover and a cylinder seat, the cylinder body is fixed on the inner wall of the valve body through the cylinder seat, and the Archimedes spiral hole is opened on the cylinder seat.
4. The butterfly valve with built-in Archimedes spiral cavitation-free self-damping mechanism 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.
5. The butterfly valve with built-in Archimedes spiral cavitation-free self-damping mechanism according to claim 1, wherein the connecting rod is provided with a pin at both ends, and the connecting rod is in hinged fit with the plug rod and the disk plate through the pin.
6. The butterfly valve with built-in archimedean spiral cavitation-free self-damping mechanism according to claim 1, wherein four damping through holes are provided, and four damping through holes are equidistantly distributed on the cylinder body in an equal arc.
7. The butterfly valve with built-in archimedes spiral cavitation-free self-damping mechanism of claim 1, wherein a bracket is provided on an outer wall surface of the valve body.
8. The butterfly valve with built-in Archimedes spiral cavitation-free self-damping mechanism according to claim 1, wherein a packing 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 packing.
9. The butterfly valve with an archimedean spiral non-cavitation self-damping mechanism of claim 1 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.
CN202210868178.2A 2022-07-22 2022-07-22 Butterfly valve with built-in Archimedes spiral line cavitation-free self-damping mechanism Pending CN115234663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210868178.2A CN115234663A (en) 2022-07-22 2022-07-22 Butterfly valve with built-in Archimedes spiral line cavitation-free self-damping mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210868178.2A CN115234663A (en) 2022-07-22 2022-07-22 Butterfly valve with built-in Archimedes spiral line cavitation-free self-damping mechanism

Publications (1)

Publication Number Publication Date
CN115234663A true CN115234663A (en) 2022-10-25

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ID=83675160

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210868178.2A Pending CN115234663A (en) 2022-07-22 2022-07-22 Butterfly valve with built-in Archimedes spiral line cavitation-free self-damping mechanism

Country Status (1)

Country Link
CN (1) CN115234663A (en)

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