WO2015003584A1 - 一种斜板止回阀 - Google Patents

一种斜板止回阀 Download PDF

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Publication number
WO2015003584A1
WO2015003584A1 PCT/CN2014/081694 CN2014081694W WO2015003584A1 WO 2015003584 A1 WO2015003584 A1 WO 2015003584A1 CN 2014081694 W CN2014081694 W CN 2014081694W WO 2015003584 A1 WO2015003584 A1 WO 2015003584A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
plate
diaphragm
valve plate
stem
Prior art date
Application number
PCT/CN2014/081694
Other languages
English (en)
French (fr)
Inventor
黄靖
罗建群
桂新春
唐爱华
殷建国
董真
Original Assignee
株洲南方阀门股份有限公司
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 株洲南方阀门股份有限公司 filed Critical 株洲南方阀门股份有限公司
Priority to US14/781,566 priority Critical patent/US10107405B2/en
Publication of WO2015003584A1 publication Critical patent/WO2015003584A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/001Noise damping
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10Valves; Arrangement of valves
    • F04B53/102Disc valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10Valves; Arrangement of valves
    • F04B53/1087Valve seats
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/16Lift 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
    • F16K1/18Lift 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
    • F16K1/20Lift 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 arranged externally of valve member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/16Lift 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
    • F16K1/18Lift 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
    • F16K1/20Lift 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 arranged externally of valve member
    • F16K1/2021Lift 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 arranged externally of valve member with a plurality of valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00Check valves
    • F16K15/18Check valves with actuating mechanism; Combined check valves and actuated valves
    • F16K15/182Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
    • F16K15/1821Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for check valves with a hinged or pivoted closure member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/12Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • F16K31/1266Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being acted upon by the circulating fluid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K39/00Devices for relieving the pressure on the sealing faces
    • F16K39/02Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/024Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K39/00Devices for relieving the pressure on the sealing faces
    • F16K39/02Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/028Devices for relieving the pressure on the sealing faces for lift valves with pivoted closure members, e.g. butterfly valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00Means in valves for absorbing fluid energy
    • F16K47/02Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • F16K47/023Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7722Line condition change responsive valves
    • Y10T137/7837Direct response valves [i.e., check valve type]
    • Y10T137/7838Plural
    • Y10T137/7841One valve carries head and seat for second valve

Definitions

  • the present invention relates to the field of check valves, and more particularly to a diaphragm type slider control swash plate check valve installed at a water pump outlet.
  • a check valve is a member that is disposed in a pipe so that the medium is directed to flow without backflow, and is increasingly used for various types of pipe networks.
  • the slow-closing small valve plate (or slow-closing cam) and the valve stem are connected by a hinge (or chain plate) with a sliding groove. There is a free stroke, and the valve stem cannot completely control the position of the slow-closing small valve plate. In the middle, the slow-closing small valve plate is in an uncontrolled state, and is oscillated by the water flow disturbance, which increases the flow resistance and cannot reflect the opening state to the outside; in small flow or small pressure conditions, the small valve plate is not in In the fully open position, when the large valve plate is fast-closed, the slow-closed small valve plate will be closed quickly under the action of gravity due to the free travel, thereby causing the slow-closing phase of the two-stage closed valve to be imaginary.
  • valve stem acts as the maximum force, and the maximum reaction force is at an angle with the axis of the valve stem, which causes the valve stem to be subjected to radial bending moment, which is prone to valve stem bending and crushing damage.
  • the stem guide bushing causes the stem to fail. 4
  • the connecting parts of the slow-closing small valve plate (or slow-closing cam) are protected by the lock nut and the split pin. Because they are oscillated by the water flow, the split pin is often cut and the lock nut is loose. The phenomenon that the entire slow-closing cam is detached by the water causes the slow-closing hole to be closed.
  • the shape of the 5 large valve plates does not conform to the drop-shaped streamline design with low flow resistance.
  • the small valve plate has a free stroke that will oscillate due to water flow disturbance, which increases the running water loss and is a non-energy-saving product. 6 With a DC structure, the resistance loss is large. Therefore, the development of a new type of diaphragm control slider type swash plate check valve has been an urgent technical problem to be solved.
  • the object of the present invention is to provide a diaphragm-controlled slider type swash plate check valve to solve the problem of solving the two-stage slow-closing failure, correcting the irrational eccentric design, eliminating the release of the slow-closing member, eliminating the valve closing impact, and reducing the flow resistance.
  • Technical problems such as water damage, prevention of oil spills and environmental pollution.
  • a swash plate check valve including a left valve body, a right valve body, a large valve plate, a small valve plate, and a diaphragm control assembly, and a left valve body and a right valve body
  • the butt is slanted through the oblique mouth, the oblique direction is inclined from the upper to the right valve body, the diaphragm control assembly is arranged on the left valve body, the large valve plate is arranged along the oblique opening, and the large valve plate is in the left and right valves.
  • the large valve plate is suspended by the valve shaft on the shaft hole of the left valve body, the small valve plate is connected with the diaphragm control assembly, and the small valve plate is mounted on the large valve plate by the small valve plate pin shaft.
  • the angle between the oblique or large valve plate and the horizontal plane is 50° to 65°.
  • a valve stem is disposed in the diaphragm control assembly, the valve stem is connected to the connecting rod and/or the sliding block, and the diaphragm control assembly and the small valve plate are connected by a connecting rod and/or a sliding block to ensure the diaphragm.
  • the valve stem in the control assembly is linked to the small valve plate.
  • valve shaft is symmetrically disposed on both sides of the large valve plate, and the bearing shaft and the valve rod mating surface are provided with bearings for connecting the large valve plate when opening and closing; the end surface of the valve shaft is provided with a thrust bearing; the bearing and the thrust
  • the bearings are all self-lubricating bearings.
  • the outer surface of the large valve plate on the side of the right valve body is provided with a concave streamlined recess; the large valve plate is also provided with a weight; the large valve plate adopting the recess and the weight is passed The center of gravity check is made so that the large valve plate can be completely closed under the action of its own weight; the surface area of the small valve plate is 3%-10% of the surface area of the large valve plate.
  • an inclined valve seat is disposed between the left valve body and the right valve body, and a valve plate sealing ring is disposed on the large valve plate, and the valve plate sealing ring and the inclined valve seat form a pair of large valve plate sealing pairs;
  • the valve plate sealing pair is sealed by a spherical surface and a tapered surface sealing seal;
  • the valve plate sealing ring is made of a metal hard sealing material and/or a soft sealing material.
  • the inclined body of the left valve body and the right valve body are provided with a slanted flange, and the inclined valve seat is clamped between the inclined flange of the left valve body and the inclined flange of the right valve body, and the inclined valve seat is Removable parts or non-removable, all-in-one components.
  • the bottom of the swash plate check valve is provided with a reserved interface, and a cover or a damper is installed on the reserved interface.
  • an opening indicating device is connected to the valve shaft, and the opening indicating device comprises an opening positioning column, an opening indicator rod, an opening degree pointer and an opening degree sign, and the opening positioning column is disposed on the valve shaft and the large valve plate.
  • opening indication The rod is disposed in the hollow valve shaft; the opening indicator rod is connected to the opening positioning column at one end, the valve shaft is exposed at the other end and passes through the end cover, and the opening indicator is arranged on the opening indicator rod of the end cover, and the opening indicator is indicated On the opening sign; or the signal indicating device is also installed on the opening indicating device.
  • the diaphragm control assembly includes a diaphragm seat, a rubber diaphragm and a valve cover, and the rubber diaphragm is used as an interface, and the chamber composed of the diaphragm seat and the valve cover is divided into a diaphragm upper chamber and a membrane that are not water-permeable.
  • the diaphragm control assembly further includes a valve stem bushing, a valve stem and a diaphragm Pressing plate, the diaphragm pressing plate is closely attached to the rubber diaphragm, the valve stem bushing is fixed on the diaphragm seat, the upper part of the valve stem passes through the rubber diaphragm and the diaphragm pressing plate and is fixed on the overlapping of the rubber diaphragm and the diaphragm pressing plate
  • the middle of the valve stem is sleeved in the valve stem bushing, and the lower end of the valve stem is connected to the small valve plate;
  • the lower end of the valve stem is provided with a slider and/or a connecting rod; and the valve stem and the small valve plate are connected by a connecting rod , or
  • the valve stem slides in the chute through the slider or holds the valve through the connecting rod
  • the volume of the upper chamber of the diaphragm and the lower chamber of the diaphragm is affected by the difference in water pressure between the inlet of the valve and the outlet of the valve.
  • the change in volume drives the valve stem to move up and down in the stem bushing, moving up and down
  • the slider and/or the connecting rod are transmitted to the small valve plate to rotate the small valve plate around the small valve plate pin.
  • the invention has the following beneficial effects: a.
  • the double valve plate design of the quick closing large valve plate and the slow closing small valve plate the valve opening is first opened and then opened quickly, and the slow opening is adjustable; when the valve is closed, the large valve plate is eccentric Under the dynamic balance of the heavy moment and the positive residual current pushing torque, it is fully closed when the forward water flow is close to zero flow rate, and the 95% flow area is cut off; the slow closing small valve plate can be adjusted slowly, and the possible back pressure boosting can be performed. Unloading and release, with the function of reducing the start-up pump and stopping the pump water hammer. b.
  • the upper chamber of the diaphragm has the function of water hammer absorption.
  • the fast-closing large valve plate adopts the gravity center check design method, and the flat rolling thrust bearing arranged in pairs completely positions the large valve plate without friction in the axial direction, and combines the bottom surface hollowing, the back side plus the weight, and the large valve plate when the pump is stopped.
  • the slow closing small valve plate and the vertical valve stem are connected by the chute slider without free travel, and the small valve plate stroke indicating rod and other parts are arranged to realize the opening of the large and small valve plates.
  • the design slider (valve pin) of the invention slides in the sliding slot, so that the valve stem and the slow-closing small valve plate become a completely controlled sliding rod mechanism, and the force-contacting surface is a planar contact, the valve The rod is subjected to the reaction force through the stem axis, the valve stem no longer bears the bending moment, and the stem is squeezed by the guide bushing to cause the bushing to break.
  • the sliding block structure of the slider is adopted in the invention, and the movement of the slow-closing small valve plate is completely controlled without the swing phenomenon, and the anti-loose measure of the pin shaft adopts the anti-loose measure of the riding screw without the convex obstacle, and the anti-loose is reliable.
  • the valve stem and the slow-closing small valve plate are connected by a sliding slot slider, and the stroke of the small valve plate is completely controlled, and there is no free swinging space.
  • the present invention positions the fully open position of the large valve plate, and completely positions the axially through the planar thrust rolling bearing, thereby avoiding the occurrence of the swinging and swaying phenomenon, and the axial rolling thrust bearing is axially oriented to the large valve plate.
  • the small valve plate anti-off design adopts the circumferential ring setting screw structure. g.
  • the bottom surface of the large valve plate is hollowed out, the back side is weighted, the flow cross section is designed with a low flow resistance, and the sealing pair is designed as a general structure of rubber soft seal and metal hard seal.
  • FIG. 1 is a schematic view showing the structure of a diaphragm-controlled slider type swash plate check valve according to a preferred embodiment of the present invention
  • FIG. 2 is a diaphragm control slider type swash plate check according to a preferred embodiment of the present invention.
  • 2 is a schematic structural view of a valve
  • FIG. 3 is a schematic structural view of a diaphragm-controlled link type swash plate check valve according to a preferred embodiment of the present invention. illustration:
  • valve body 1, left valve body, 2, right valve body, 3, large valve plate, 4, small valve plate, 5, diaphragm control assembly, 6, valve shaft, 7, small valve plate pin, 8, inclined seat 9, diaphragm seat, 10, rubber diaphragm, 11, valve cover, 12, upper bypass pipe, 13, lower bypass pipe, 14, stem bushing, 15, valve stem, 16, diaphragm pressure plate, 19, thrust bearing, 20, bearing positioning sleeve, 21, bearing, 22, end cover, 23, opening positioning column, 24, opening indicator, 25, opening pointer, 26, opening sign, 27, valve Plate sealing ring, 28, small valve plate apron, 29, slow closing valve seat, 30, recessed part, 31, stem pin, 32, stem upper bushing, 33, stem lower bushing, 34, even Rod.
  • FIG. 1 is a schematic structural view showing a diaphragm-controlled slider type swash plate check valve according to a preferred embodiment of the present invention
  • FIG. 2 is a schematic view showing the structure of a diaphragm-controlled slider type swash plate check valve according to a preferred embodiment of the present invention
  • FIG. 3 is a schematic structural view of a diaphragm-controlled link type swash plate check valve according to a preferred embodiment of the present invention.
  • the swash plate check valve includes a left valve body 1 and a right valve.
  • the left valve body 1 and the right valve body 2 are bolted by a diagonal flange, and the upper portion of the inclined flange is from the left valve body 1 to the right valve body Tilted in 2 directions, the inclined valve seat 8 is located on the right valve body 2 and is clamped between the two inclined flanges at an angle of 55 ° to the axis of the diaphragm control slider type swash plate check valve.
  • the large valve plate 3 is arranged along the oblique opening, and the large valve plate 3 is suspended on the shaft hole of the left valve body 1 through the left and right valve shafts 6.
  • the shaft hole is located at a position 1/3 of the center of the large valve plate 3, and can be wound around the left and right valves.
  • the shaft 6 is rotated at a maximum angle of 45 °.
  • the center of rotation of the small valve plate 4 is concentric with the center of rotation of the large valve plate 3, and is connected to the end of the valve stem 15 in the diaphragm control unit 5 via the slider 17, and the slow closing valve port a of the large valve plate 3 can be closed by the sealing pair.
  • the double valve plate design of the quick closing large valve plate and the slow closing small valve plate is firstly opened and then opened quickly, and the opening is adjustable; when the valve is closed, the large valve plate 3 is in the eccentric weight and the positive residual current pushing torque Under the dynamic balance, it is fully closed when the forward water flow drops close to zero flow rate, and the flow area is cut off by 95%; the small valve plate 4 can be adjusted slowly, unloading and releasing the possible backflow boost, and at the same time During the valve process, the volume of the upper chamber of the diaphragm with the rubber diaphragm 10 communicating with the outlet of the valve through the bypass tube is slowly increased, and the belt has a good absorption effect for the back pressure boosting, which is equivalent to a water hammer absorber.
  • the valve has the function of reducing the start-up pump and stopping the pump water hammer. It is also that the angle between the oblique or large valve plate 3 and the horizontal plane is 50° to 65°.
  • the diaphragm control assembly 5 is provided with a valve stem 15 which is connected to the connecting rod 34 and/or the slider 17, and between the diaphragm control assembly 5 and the small valve plate 4 via the connecting rod 34 and/or the slider 17. The connection is made to ensure that the valve stem 15 in the diaphragm control assembly 5 is interlocked with the small valve plate 4, and the up and down movement of the valve stem 15 does not interfere with the rotational movement of the small valve plate 4.
  • valve shaft 6 is symmetrically disposed on both sides of the large valve plate 3, the valve shaft 6 and the valve rod 15 are provided with a bearing 21 for connecting the large valve plate when opening and closing; the end surface of the valve shaft 6 is provided with a thrust bearing 19; Both the bearing 21 and the thrust bearing 19 are self-lubricating bearings.
  • the outer surface of one side of the large valve plate 3 on the right valve body 2 is provided with a concave streamlined recess 30, and the large valve plate 3 is also provided with a weight; a large valve using the recess 30 and the weight
  • the plate 3 is checked by the center of gravity position so that the large valve plate 3 can be completely closed under the action of its own weight; the plate surface area of the small valve plate 4 is 3%-10% of the surface area of the large valve plate 3.
  • An inclined valve seat 8 is disposed between the left valve body 1 and the right valve body 2.
  • the large valve plate 3 is provided with a valve plate sealing ring 27, and the valve plate sealing ring 27 and the inclined valve seat 8 form a pair of large valve plates.
  • valve plate sealing ring 27 is made of metal hard sealing material and/or soft sealing material.
  • the inclined body of the left valve body 1 and the right valve body 2 is provided with a slanted flange, and the inclined valve seat 8 is clamped between the inclined flange of the left valve body 1 and the inclined flange of the right valve body 2, the inclined valve
  • the seat 8 is a detachable component or a non-detachable integrated component.
  • a reserved interface is arranged at the bottom of the swash plate check valve, and a cover or a damper is installed on the reserved interface.
  • An opening indicating device is connected to the valve shaft 6, and the opening indicating device includes an opening positioning post 23, an opening indicating lever 24, an opening pointer 25 and an opening sign 26, and the opening positioning post 23 is disposed on the valve shaft 6 and the large a portion where the valve plate 3 is connected; the opening indicating rod 24 is disposed in the hollow valve shaft 6; the opening indicating rod 24 is connected to the opening positioning post 23, and the other end is exposed to the valve shaft 6 and passes through the end cap 22, passing through
  • the opening degree indicating lever 24 of the end cover 22 is provided with an opening degree pointer 25, and the opening degree pointer 25 is indicated on the opening degree sign 26; or the opening degree indicating means is further provided with a signal transmitting means.
  • the diaphragm control assembly 5 includes a diaphragm seat 9, a rubber diaphragm 10 and a valve cover 11, with the rubber diaphragm 10 as an interface, and the chamber formed by the diaphragm seat 9 and the valve cover 11 is divided into upper and lower water-free diaphragms.
  • the diaphragm control assembly 5 further includes a valve stem lining The sleeve 14, the valve stem 15 and the diaphragm pressing plate 16, the diaphragm pressing plate 16 is in close contact with the rubber diaphragm 10, the valve stem bushing 14 is fixed on the diaphragm seat 9, and the upper portion of the valve stem 15 passes through the rubber diaphragm 10 and the membrane.
  • the platen plate 16 is fixed on the stacking member composed of the rubber diaphragm 10 and the diaphragm pressing plate 16, the valve rod 15 is sleeved in the middle of the valve stem bushing 14, and the lower end of the valve stem 15 is connected to the small valve plate 4; the valve stem 15 The lower end is provided with a slider 17 and/or a connecting rod 34.
  • the small valve plate 4 is provided with a sliding slot 18, and the valve stem 15 and the small valve plate 4 are connected by a slider 17 and/or a connecting rod 34, the valve stem 15 Sliding in the chute 18 by the slider 17 or maintaining the valve stem 15 in the vertical direction by the connecting rod 34; the volume of the upper chamber of the diaphragm and the lower chamber of the diaphragm is controlled by the valve inlet and the valve outlet.
  • the change of the volume changes, the change of the volume drives the valve rod 15 to move up and down in the valve stem bushing 14, and the up and down movement is transmitted to the small valve plate 4 through the slider 17, so that the small valve plate 4 is wound around the small valve plate pin 7. Rotating motion.
  • the diaphragm control assembly 5 includes a diaphragm holder 9, a valve stem 15, a rubber diaphragm 10, a diaphragm pressure plate 16, a valve cover 11, a slider 17 and a valve stem bushing 14, a diaphragm pressing plate 16, and a rubber film.
  • the sheet 10 is disposed in the diaphragm cavity composed of the diaphragm seat 9 and the valve cover 11, and the diaphragm pressing plate 16 is respectively adhered to the upper and lower membrane surfaces of the rubber diaphragm 10, and the laminated plate composed of the diaphragm pressing plate 16 and the rubber diaphragm 10 is The top end of the valve stem 15 is fixed.
  • the rubber diaphragm 10 divides the diaphragm cavity into a diaphragm upper chamber and a diaphragm lower chamber that are not connected up and down.
  • the valve stem 15 of the diaphragm control assembly 5 is mounted with a slider 17 at its lower end through a valve stem pin 31.
  • the small valve plate 4 has a chute 18 therein, and the slider 17 is located in the chute 18.
  • a thrust bearing 19 is mounted, and the large valve plate 3 is completely positioned in the direction of the shaft hole by the left and right valve shafts 6 and the left and right end covers 22, so that the large valve plate 3 has sufficient rotation. Flexibility, and will not be disturbed by the current.
  • the invention adopts the slider connecting rod structure, and the slow closing small valve plate is completely controlled, adopting the circumferential ring riding screw to prevent looseness, is not affected by the water flow, and is resistant to vibration, thereby preventing the falling off phenomenon in use.
  • the slider linkage mechanism is designed to make the small valve plate 4 in the most closed position of the force, and the force received is vertically loaded in the water.
  • the reaction force of the valve stem 15 passes through its axis and is not affected by the bending moment, which overcomes the phenomenon that the valve plate is subjected to the bending moment and the bushing is pressed by the prior art.
  • the large valve plate 3 is completely positioned in the axial direction without turbulence, and the rotation is flexible without jamming.
  • the large valve plate 3 adopts the thrust bearing 19 for axially complete positioning. In operation, the large valve plate 3 is completely free from turbulence, and the opening and closing has no jamming, and the action is sensitive, and can accurately adapt to the instantaneous water flow change in time, and the valve is closed smoothly. No collision.
  • the prior art can only be made into a soft seal form, and the invention can be made into a metal hard seal form, and the soft seal and the hard seal form only need to replace the valve plate seal ring 27, and other parts can be completely universal, which can be realized.
  • the zero flow rate is fast, and the soft and hard seals are interchangeable.
  • the left valve body 1 and the right valve body 2 are provided with a slanted flange, and the left valve body and the right valve body are integrally connected by a flange and a bolt.
  • An inclined valve seat 8 is disposed on the right valve body 2, and the inclined valve seat 8 is sandwiched between the inclined flange of the left valve body 1 and the inclined flange of the right valve body 2.
  • the diaphragm control assembly 5 includes a diaphragm holder 9, a rubber diaphragm 10 and a valve cover 11, with the rubber diaphragm 10 as an interface, and the chamber formed by the diaphragm holder 9 and the valve cover 11 is divided into upper and lower water-proof diaphragms.
  • the upper chamber and the lower chamber of the diaphragm, the upper chamber of the diaphragm communicates with the outlet of the valve through the upper bypass tube 12, and the lower chamber of the diaphragm communicates with the inlet of the valve through the lower bypass tube 13.
  • the diaphragm control assembly 5 further includes a valve stem bushing 14, a valve stem 15 and a diaphragm pressing plate 16, the diaphragm pressing plate 16 abutting against the rubber diaphragm 10, and the valve stem bushing 14 being fixed to the diaphragm seat 9, the valve stem
  • the upper portion passes through the rubber diaphragm 10 and the diaphragm pressing plate 16 and is fixed on the laminated member composed of the rubber diaphragm 10 and the diaphragm pressing plate 16.
  • the valve rod 15 is sleeved in the middle of the valve stem bushing 14, and the lower end of the valve stem 15 is connected. On the small valve plate 4.
  • the lower end of the valve stem 15 is provided with a slider 17, and the small valve plate 4 is provided with a sliding slot 18 or a shaft hole, and the valve stem 15 and the small valve plate 4 are connected by a slider 17 and/or a connecting rod 34, the valve stem 15 Sliding within the chute 18 by the slider 17 keeps the valve stem 15 in a vertical direction or the valve stem 15 holds the valve stem 15 in a vertical direction through the connecting rod 34.
  • the volume of the upper chamber of the diaphragm and the lower chamber of the diaphragm is affected by the difference in water pressure between the inlet of the valve and the outlet of the valve.
  • the change in volume drives the valve stem 15 to move up and down in the stem bushing 14 and move up and down through the slider 17 It is transmitted to the small valve plate 4, and the small valve plate 4 is rotated about the small valve plate pin 7.
  • a diaphragm presser 16 is provided on both the upper and lower membrane faces of the rubber membrane 10.
  • the angle between the inclined mouth, the inclined flange or the inclined seat 8 is 40° ⁇ 70° from the horizontal plane.
  • the small valve plate pin shaft 7 adopts a retaining mechanism that is free of convex obstacles and a circumferential ring.
  • the valve shaft 6 is symmetrically disposed on both sides of the large valve plate 3, and the valve shaft 6 disposed on both sides of the large valve plate 3 is concentric with the axis of the small valve plate pin shaft 7; the two ends of the valve shaft 6 are respectively connected to the left valve body 1 and the large On the valve plate 3.
  • the valve shaft 6 - end is connected to the left valve body 1 via a movable shaft, and the other end is connected to the large valve plate 3 via a thrust bearing 19, a bearing positioning sleeve 20, a bearing 21 and an end cover 22, and the valve shaft 6 is opposed to the large valve plate 3
  • Positioning is such that the large valve plate can only rotate in the direction of the bearing 21 without axial sway.
  • the valve shaft 6 and the stop block on the left valve body 1 limit the rotational movement of the large valve plate 3 about the valve shaft 6 at a maximum angle of 45°.
  • An opening indicating device is connected to the valve shaft 6.
  • the opening indicating device includes an opening positioning post 23, an opening indicating lever 24, an opening pointer 25 and an opening degree sign 26, and the opening positioning post 23 is disposed at a position where the valve shaft 6 is connected with the large valve plate 3; the opening indicator rod 24 is disposed in the hollow valve shaft 6; the opening indicator rod 24 is connected to the opening positioning post 23, and the other end is exposed to the valve shaft 6 and passes through the end cover 22, and is inserted through the opening degree indicating rod 24 of the end cover 22.
  • the opening pointer 25 and the opening pointer 25 are indicated on the opening sign 26.
  • a valve plate sealing ring 27 is mounted on the outer surface of the large valve plate 3, and the valve plate sealing ring 27 and the inclined valve seat 8 form a pair of large valve plate sealing pairs:
  • a small valve plate apron 28 is attached to the bottom surface of the plate 4, and the small valve plate apron 28 and the slow-closing valve seat 29 to which the large valve plate 3 is slowly closed to the valve port a form a pair of slow-closing valve port sealing pairs.
  • the outer surface of the large valve plate 3 on the water-facing side is designed with a streamlined drop-shaped recess 30, and the large valve plate 3 is also provided with a weight.
  • the large valve plate 3 which employs the recessed portion 30 and the weight, passes through the center of gravity check, so that the large valve plate 3 is guaranteed to be completely closed under its own weight.
  • the diaphragm control assembly 5 limits the small valve plate 4 to a pivoting motion of the small valve plate pin 7 at a maximum angle of 55 °.
  • the stem bushing 14 includes a stem upper bushing 32 and a stem lower bushing 33 that simultaneously pass through the stem upper bushing 32 and the stem lower bushing 33. It is also connected between the valve stem 15 and the small valve plate 4 by a connecting rod.
  • the small valve plate 4 is further provided with a sliding groove 18, and the valve rod 15 and the small valve plate 4 are coupled to the sliding groove 18 through the slider 17.
  • valve stem 15 and the small valve plate 4 are coupled by a combination of the slider 17 and the connecting rod 34.
  • the valve stem 15 slides within the chute 18 by the slider 17 or maintains the valve stem 15 in the vertical direction by the connecting rod 34.
  • the volume of the upper chamber of the diaphragm and the lower chamber of the diaphragm is affected by the difference in water pressure between the inlet of the valve and the outlet of the valve.
  • the change in volume drives the valve stem 15 to move up and down in the stem bushing 14 and move up and down through the slider 17
  • the connecting rod 34 is transmitted to the small valve plate 4 to cause the small valve plate 4 to rotate about the small valve plate pin 7.
  • the opening degree indicating means of the large valve plate 3 is added, and the stroke opening degree indication of the small valve plate 4 can be easily added, and the opening degree of the large-sized valve plate can be displayed in real time.
  • the utility model is also characterized in that the hollow surface shape and the back weight parameter of the large valve plate 3 are three-dimensionally optimized, so that each cross section of the large valve plate 3 in the water flow direction is close to the streamlined water drop shape with low flow resistance, after the valve is opened The small forward flow can maintain the fast closing large valve plate 3 in the fully open position, and is limited to the fully open position, without shaking with the water flow, the small valve plate 4 is completely positioned without shaking, reducing the water passing through the valve damage.
  • the large valve plate 3 that can rotate flexibly can fall down to the corresponding position with the decrease of the forward water flow under the action of the eccentric weight torque.
  • the large valve plate 3 will be closed in time.
  • the zero flow rate shutoff valve is used to cut off the flow area of more than 95%.
  • the small valve plate 4 controlled by the diaphragm control unit 5 adopts a non-convex peripheral ring riding screw to prevent the loosening structure, and there is no falling off during use, and there is nowhere to hinder the debris in the water flow.
  • the small valve plate 4 transmits the water pressure difference of the diaphragm chamber to the large valve plate 3, so that the opening speed of the large valve plate 3 is controlled to achieve a slow opening; when the small valve plate 4 is closed, it will The water pressure difference of the diaphragm chamber is transmitted to the large valve plate 3, and the sealing specific pressure of the large valve plate 3 is increased, so that the closing of the large valve plate 3 is more tight and not leaking.
  • the valve is kept closed, the pressure is applied to the pump, and the valve is lightly loaded to reduce the starting current of the pump motor.
  • the water pressure on the inlet side of the pump is increased, the water pressure difference between the two sides of the valve plate is utilized.
  • the driving size valve plate is opened, and the maximum opening angle of the quick closing large valve plate 3 is related to the flow rate and the pressure.
  • the control of the differential pressure between the upper and lower chambers of the small valve plate 4 by the diaphragm plate 4 can be maintained at the maximum opening degree only by a pressure difference of 2 m. No jitter.
  • the drain hole Under the control of 5, the drain hole is closed with the controlled slow decline of the valve stem 15, and the slow closing is realized to reduce the water pump reversal time and the highest reverse rotation speed, preventing the water hammer from being impacted, and the upper cavity of the diaphragm is in the process of expanding the volume. It can act as an energy absorbing chamber to absorb the boosting head and provide hammer protection for the pump unit and piping system.

Abstract

一种斜板止回阀,包括左阀体(1)、右阀体(2)、大阀板(3)、小阀板(4)和膜片控制组件(5),左阀体(1)与右阀体(2)之间通过斜口对接为一体,斜口倾斜方向为上部向右阀体(2)方向倾斜,膜片控制组件(5)设置在左阀体(1)上,大阀板(3)沿斜口布置,大阀板(3)处于左阀体(1)和右阀体(2)构成的阀腔内,大阀板(3)通过阀轴(6)悬挂在左阀体(1)的轴孔上,小阀板(4)与膜片控制组件(5)连接,小阀板(4)通过小阀板销轴(7)安装在大阀饭(3)的缓闭阀口处。可以实现大阀板迅速关闭,大阀板泄流孔上小阀板可调时间缓闭的二阶段关阀过程,达到减少水体倒流,消除启泵和停泵水锤的目的。

Description

一种斜板止回阀 技术领域 本发明涉及止回阀技术领域, 特别地, 涉及一种安装在水泵出水口的膜片式滑块 控制斜板止回阀。 背景技术 止回阀是设置于管道中使得介质定向流动而不致倒流的构件, 越来越广泛的用于 各类管网。 目前, 安装在水泵出水口能够起到不需附加其他装置自动实现闭闸启动和 两阶段关闭的止回阀在结构上和使用上存在很多问题:
①缓闭小阀板 (或称缓闭凸轮)与阀杆采用带滑槽的铰链 (或链板) 连接, 存在自 由行程, 阀杆不能完全控制缓闭小阀板的位置, 在阀门运行过程中, 缓闭小阀板处于 非受控状态, 会受水流扰动而摆动, 增大了流阻且无法向外界反映其开度状态; 在小 流量或小压力工况时, 小阀板不是处于全开位置时, 当大阀板速闭, 缓闭小阀板因存 在自由行程也会在重力作用下速闭, 从而导致二阶段关阀的缓闭阶段形态虚设。
②大阀板的偏心设计不合理, 没有经过重心校核,大阀板完全关闭需借助逆流水, 导致关阀出现碰撞现象, 逆流量大, 水泵反转时间长, 反转转速高, 存在安全隐患, 且因密封副存在碰撞冲击现象不能做成金属硬密封形式。
③ 在整个阀门关闭后, 阀杆作为最大施力物,其所受的最大支反力与阀杆轴线成 一夹角, 使阀杆受到径向弯矩, 易发生阀杆弯曲现象并挤压破坏阀杆导向衬套, 导致 阀杆失效。 ④ 缓闭小阀板 (或称缓闭凸轮)的连接零部件采用锁紧螺母、 开口销等结构防脱, 因其受水流扰动而摆动, 常出现开口销被剪断、 锁紧螺母松脱、 整个缓闭凸轮脱落被 水冲走的现象, 导致缓闭孔不能关闭。
⑤ 大阀板的外形不符合低流阻的水滴状流线型设计,小阀板存在自由行程会因水 流扰动而出现摆动, 增大运行水损, 是非节能产品。 ⑥ 采用直流式结构, 阻力损失大。 因此, 研制新型的膜片控制滑块式斜板止回阀已为亟待解决的技术问题。 发明内容 本发明目的在于提供膜片控制滑块式斜板止回阀, 以解决解决二阶段缓闭失效、 纠正不合理的偏心设计、 杜绝缓闭件松脱、 消除关阀冲击、 降低流阻和水损、 防止漏 油污染环境等的技术问题。 为实现上述目的, 根据本发明的一个方面, 提供了斜板止回阀, 包括左阀体、 右 阀体、 大阀板、 小阀板和膜片控制组件, 左阀体与右阀体之间通过斜口对接为一体, 斜口倾斜方向为上部向右阀体方向倾斜, 膜片控制组件设置在左阀体上, 大阀板沿斜 口布置, 大阀板处于左阀体和右阀体构成的阀腔内, 大阀板通过阀轴悬挂在左阀体的 轴孔上, 小阀板与膜片控制组件连接, 小阀板通过小阀板销轴安装在大阀板的缓闭阀 口处。 进一步地, 斜口或大阀板与水平面的夹角为 50° ~65 ° 。 进一步地, 膜片控制组件中设置有阀杆, 阀杆与连杆和 /或滑块相连, 膜片控制组 件与小阀板之间通过连杆和 /或滑块进行连接, 以确保膜片控制组件中的阀杆与小阀板 联动。 进一步地, 阀轴对称设置在大阀板两侧, 阀轴与阀杆配合面设置有用于大阀板开 闭时起连接作用的轴承; 阀轴的端面设置有止推轴承; 轴承和止推轴承均为自润滑轴 承。 进一步地, 大阀板靠右阀体的一侧的外表面设置有内凹流线形的凹陷部; 大阀板 还设置有配重块; 采用了凹陷部和配重块的大阀板经过了重心位置校核, 以使大阀板 能在自重作用下完全关闭; 小阀板板面面积是大阀板板面面积的 3%-10%。 进一步地, 的左阀体与右阀体之间设置有斜置阀座,大阀板上设置有阀板密封圈, 阀板密封圈与斜置阀座形成一对大阀板密封副; 大阀板密封副采用球面与锥面接触密 封形式进行密封; 阀板密封圈采用金属硬密封材料和 /或软密封材料。 进一步地, 左阀体和右阀体的斜口上均带有斜法兰, 斜置阀座夹持于左阀体的斜 法兰与右阀体的斜法兰之间, 斜置阀座为可拆卸部件或者不可拆卸的一体化组件。 进一步地,斜板止回阀底部设置有预留接口,预留接口上安装有封盖或者阻尼器。 进一步地, 阀轴上连接有开度指示装置, 开度指示装置包括开度定位柱、 开度指 示杆、 开度指针和开度标牌, 开度定位柱设置在阀轴与大阀板连接的部位; 开度指示 杆设置在中空的阀轴内; 开度指示杆一端连接开度定位柱, 另一端露出阀轴并且穿过 端盖, 穿过端盖的开度指示杆上装有开度指针, 开度指针指示在开度标牌上; 或者开 度指示装置上还安装有信号传送装置。 进一步地, 膜片控制组件包括膜片座、 橡胶膜片和阀盖, 以橡胶膜片为分界面, 将膜片座与阀盖组成的腔室分为上下不通水的膜片上腔和膜片下腔两部分, 膜片上腔 通过上旁通管与阀门出口连通, 膜片下腔通过下旁通管与阀门进口连通; 膜片控制组 件还包括阀杆衬套、 阀杆和膜片压板, 膜片压板紧贴在橡胶膜片上, 阀杆衬套固定在 膜片座上, 阀杆上部穿过橡胶膜片和膜片压板并固定在橡胶膜片和膜片压板组成的叠 合件上, 阀杆中部套在阀杆衬套内, 阀杆下端连接在小阀板上; 阀杆下端设置有滑块 和 /或连杆; 阀杆与小阀板之间通过连杆进行连接, 或者小阀板上还设置有滑槽, 阀杆 与小阀板之间通过滑块与滑槽配合进行连接, 或者阀杆与小阀板之间通过滑块和连杆 的组合件配合进行连接; 阀杆通过滑块在滑槽内滑动或者通过连杆保持阀杆处于竖直 方向; 膜片上腔和膜片下腔的容积大小受阀门进口和阀门出口的水压差影响而变化, 容积的变化驱动阀杆在阀杆衬套中作上下运动, 上下运动通过滑块和 /或连杆传递给小 阀板, 使小阀板绕小阀板销轴作旋转运动。 本发明具有以下有益效果: a、 速闭大阀板加缓闭小阀板的双阀板设计, 开阀时先缓开后快开, 且缓开可调; 关阀时大阀板在偏心重力矩和正向余流推力矩的动态平衡下, 在正向水流接近零流速 时全关, 切断 95%的通流面积; 缓闭小阀板可调缓闭, 对可能存在的倒流升压进行卸 荷和释放, 具有最优的减消启泵和停泵水锤的功能。 b、 膜片上腔具有水锤吸纳的作用。 c、速闭大阀板采用重心校核设计法, 成对设置的平面滚动止推轴承对大阀板进行 轴向无摩擦完全定位, 结合底面挖空、 背面加配重, 停泵时大阀板对正向余流的下降 反应灵敏、 速闭动作快、 靠自身重力关闭到位、 不需要依靠逆流带动关闭, 避免了依 靠逆流带动关闭导致的关阀碰撞、 密封副冲击、 逆流时间长、 在逆流加大时才速闭等 问题, 还解决了因速闭有碰撞和冲击密封副只能用橡胶软密封不能用金属硬密封等难 题, 同时顺流向的截面呈低流阻的水滴状设计减少了阀门最小流阻; d、设置有外部开度指示, 缓闭小阀板加装开度指示完全受控。通过设置水平空心 阀轴、 开度指示杆, 缓闭小阀板与垂直阀杆通过无自由行程的滑槽滑块相连接, 设置 小阀板行程指示杆等零件, 实现了大小阀板开度的实时显示; e、 本发明设计滑块(阀杆销轴)在滑槽中滑动, 使阀杆与缓闭小阀板成为一个完 全受控的滑杆机构, 且使受力接触面为一个平面接触, 阀杆所受支反力通过阀杆轴线, 阀杆不再承受弯矩, 也不会发生阀杆挤压导向衬套导致衬套破碎的现象。 本发明采用 滑块滑槽结构, 缓闭小阀板的运动完全受控不存在摆动现象, 销轴防松措施采用无外 凸挂碍的骑缝螺钉防松措施, 防松可靠。 阀杆与缓闭小阀板采用滑槽滑块连接, 小阀 板的行程完全控, 无自由摆动空间。 f、本发明对大阀板全开位置进行了定位, 在轴向通过平面止推滚动轴承进行完全 定位, 避免了摆动和窜动现象的出现, 以平面滚动止推轴承对大阀板进行轴向完全定 位, 无间隙无窜动, 启闭无卡阻, 关阀时对正向余流的流量和压力变化反应灵敏, 关 阀无碰撞, 能实现零流速快关。 小阀板防脱设计采用周圈骑缝紧定螺钉结构。 g、 大阀板底面挖空、 背面加配重, 过流截面呈低流阻的水滴状设计, 密封副设计 为橡胶软密封和金属硬密封通用的结构。 除了上面所描述的目的、特征和优点之外, 本发明还有其它的目的、特征和优点。 下面将参照图, 对本发明作进一步详细的说明。 附图说明 构成本申请的一部分的附图用来提供对本发明的进一步理解, 本发明的示意性实 施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图中: 图 1是本发明优选实施例的膜片控制滑块式斜板止回阀的结构示意图之一; 图 2是本发明优选实施例的膜片控制滑块式斜板止回阀的结构示意图之二; 图 3是本发明优选实施例的膜片控制连杆式斜板止回阀的结构示意图。 图例说明:
1、 左阀体, 2、 右阀体, 3、 大阀板, 4、 小阀板, 5、 膜片控制组件, 6、 阀轴, 7、 小阀板销轴, 8、 斜置阀座, 9、 膜片座, 10、 橡胶膜片, 11、 阀盖, 12、 上旁通管, 13、 下旁通管, 14、 阀杆衬套, 15、 阀杆, 16、 膜片压板, 19、 止推轴承, 20、 轴承 定位套, 21、 轴承, 22、 端盖, 23、 开度定位柱, 24、 开度指示杆, 25、 开度指针, 26、 开度标牌, 27、 阀板密封圈, 28、 小阀板胶圈, 29、 缓闭阀座, 30、 凹陷部, 31、 阀杆销轴, 32、 阀杆上衬套, 33、 阀杆下衬套, 34、 连杆。 具体实施方式 以下结合附图对本发明的实施例进行详细说明, 但是本发明可以由权利要求限定 和覆盖的多种不同方式实施。 图 1是本发明优选实施例的膜片控制滑块式斜板止回阀的结构示意图之一, 图 2 是本发明优选实施例的膜片控制滑块式斜板止回阀的结构示意图之二, 图 3是本发明 优选实施例的膜片控制连杆式斜板止回阀的结构示意图, 如图 1、 2、 3所示, 斜板止 回阀, 包括左阀体 1、 右阀体 2、 膜片组件 5、 大阀板 3和小阀板 4, 左阀体 1与右阀 体 2之间通过斜法兰以螺栓连接, 斜法兰上部从左阀体 1向右阀体 2方向倾斜, 斜置 阀座 8位于右阀体 2上, 且夹持于两斜法兰之间, 与膜片控制滑块式斜板止回阀管道 轴线成 55 ° 夹角。 大阀板 3沿斜口布置, 大阀板 3通过左右阀轴 6悬挂在左阀体 1的 轴孔上,其轴孔位于大阀板 3中心偏上 1/3的位置,可绕左右阀轴 6作最大转角为 45 ° 的旋转运动。小阀板 4的回转中心与大阀板 3回转中心同心,通过滑块 17与膜片控制 组件 5中的阀杆 15末端连接, 通过密封副可以封闭大阀板 3的缓闭阀口 a。 速闭大阀板加缓闭小阀板的双阀板设计, 开阀时先缓开后快开, 且缓开可调; 关 阀时大阀板 3在偏心重力矩和正向余流推力矩的动态平衡下, 在正向水流下降接近零 流速时全关, 切断 95%的通流面积; 小阀板 4可调缓闭, 对可能存在的倒流升压进行 卸荷和释放, 同时在关阀过程中, 与阀门出口通过旁通管连通的带橡胶膜片 10的膜片 上腔体积缓慢增大, 带对倒流升压具有很好的吸纳作用, 相当于一只水锤吸纳器, 使 阀门具有最优的减消启泵和停泵水锤的功能。 其还在于, 斜口或大阀板 3与水平面的夹角为 50° ~65 ° 。 膜片控制组件 5中设 置有阀杆 15, 阀杆 15与连杆 34和 /或滑块 17相连, 膜片控制组件 5与小阀板 4之间 通过连杆 34和 /或滑块 17进行连接, 以确保膜片控制组件 5中的阀杆 15与小阀板 4 联动, 且阀杆 15上下运动与小阀板 4旋转运动不干涉。 阀轴 6对称设置在大阀板 3 两侧, 阀轴 6与阀杆 15配合面设置有用于大阀板开闭时起连接作用的轴承 21 ; 阀轴 6 的端面设置有止推轴承 19; 轴承 21和止推轴承 19均为自润滑轴承。 大阀板 3靠右阀 体 2的一侧的外表面设置有内凹流线形的凹陷部 30, 大阀板 3还设置有配重块; 采用 了凹陷部 30和配重块的大阀板 3经过了重心位置校核,以使大阀板 3能在自重作用下 完全关闭; 小阀板 4板面面积是大阀板 3板面面积的 3%-10%。的左阀体 1与右阀体 2 之间设置有斜置阀座 8, 大阀板 3上设置有阀板密封圈 27, 阀板密封圈 27与斜置阀座 8 形成一对大阀板密封副; 大阀板密封副采用球面与锥面接触密封形式进行密封; 阀 板密封圈 27采用金属硬密封材料和 /或软密封材料。 左阀体 1和右阀体 2的斜口上均 带有斜法兰, 斜置阀座 8夹持于左阀体 1的斜法兰与右阀体 2的斜法兰之间, 斜置阀 座 8为可拆卸部件或者不可拆卸的一体化组件。 斜板止回阀底部设置有预留接口, 预 留接口上安装有封盖或者阻尼器。 阀轴 6上连接有开度指示装置, 开度指示装置包括 开度定位柱 23、 开度指示杆 24、 开度指针 25和开度标牌 26, 开度定位柱 23设置在 阀轴 6与大阀板 3连接的部位; 开度指示杆 24设置在中空的阀轴 6内; 开度指示杆 24—端连接开度定位柱 23, 另一端露出阀轴 6并且穿过端盖 22, 穿过端盖 22的开度 指示杆 24上装有开度指针 25, 开度指针 25指示在开度标牌 26上; 或者开度指示装 置上还安装有信号传送装置。 膜片控制组件 5包括膜片座 9、 橡胶膜片 10和阀盖 11, 以橡胶膜片 10为分界面, 将膜片座 9与阀盖 11组成的腔室分为上下不通水的膜片上 腔和膜片下腔两部分,膜片上腔通过上旁通管 12与阀门出口连通,膜片下腔通过下旁 通管 13与阀门进口连通;膜片控制组件 5还包括阀杆衬套 14、阀杆 15和膜片压板 16, 膜片压板 16紧贴在橡胶膜片 10上, 阀杆衬套 14固定在膜片座 9上, 阀杆 15上部穿 过橡胶膜片 10和膜片压板 16并固定在橡胶膜片 10和膜片压板 16组成的叠合件上, 阀杆 15中部套在阀杆衬套 14内, 阀杆 15下端连接在小阀板 4上; 阀杆 15下端设置 有滑块 17和 /或连杆 34, 小阀板 4上设置有滑槽 18, 阀杆 15与小阀板 4之间通过滑 块 17和 /或连杆 34进行连接, 阀杆 15通过滑块 17在滑槽 18内滑动或通过连杆 34保 持阀杆 15处于竖直方向;膜片上腔和膜片下腔的容积大小受阀门进口和阀门出口的水 压差影响而变化, 容积的变化驱动阀杆 15在阀杆衬套 14中作上下运动, 上下运动通 过滑块 17传递给小阀板 4, 使小阀板 4绕小阀板销轴 7作旋转运动。 其还在于, 膜片控制组件 5包括膜片座 9、 阀杆 15、 橡胶膜片 10、 膜片压板 16、 阀盖 11、 滑块 17和阀杆衬套 14, 膜片压板 16和橡胶膜片 10设置在膜片座 9和阀盖 11组成的膜片腔内, 膜片压板 16分别紧贴橡胶膜片 10的上下膜面, 膜片压板 16与 橡胶膜片 10组成的叠合件与阀杆 15顶端固定。橡胶膜片 10将膜片腔分为上下不连通 的膜片上腔和膜片下腔。 通过上旁通管 12和下旁通管 13, 膜片上腔与阀门出口的管 道、 膜片下腔与阀门进口的管道分别连通。 膜片控制组件 5中的阀杆 15, 在其下面的 末端通过阀杆销轴 31安装有滑块 17, 小阀板 4上开有滑槽 18, 滑块 17位于滑槽 18 中。 当阀杆 15受膜片上下腔压差变化而作上下运动时, 滑块 17将在小阀板 4的滑槽 18中滑动, 将阀杆 15的上下运动转换为小阀板 4绕小阀板销轴 7的回转运动, 形成 滑块连杆机构。该滑块连杆机构在小阀板 4处于全关位置时,滑槽 18的中心线成水平 状态。滑块 17与阀杆 15的连接、 小阀板 4与小阀板销轴 7的连接处, 均采用无外凸、 周圈骑缝螺钉的防脱防松结构。 在大阀板 3的轴孔两端, 安装有止推轴承 19, 通过左 右阀轴 6和左右端盖 22将大阀板 3在轴孔方向完全定位,使大阀板 3既拥有充分的转 动灵活性, 又不会被水流扰动而窜动。 本发明采用滑块连杆结构, 缓闭小阀板完全受 控, 采用周圈骑缝螺钉防松, 不受水流冲击,抗振动, 杜绝了在使用中的脱落现象。 采 用滑块连杆机构, 设计上使小阀板 4在受力最大的关闭位置, 所受的力垂直加载在水 平滑槽面上, 阀杆 15所受的反力通过其轴线, 不受弯矩, 克服了现有技术采用链板结 构使阀杆受弯矩、 衬套受挤压的现象。 大阀板 3轴向完全定位无窜动、 转动灵活无卡 阻。本发明对大阀板 3采用止推轴承 19进行轴向完全定位,运行中大阀板 3完全无窜 动, 启闭无卡阻, 动作灵敏, 能及时精确适应瞬时水流的变化, 关阀平稳无碰撞。 故 现有技术一般只能做成软密封形式, 而本发明可以做成金属硬密封形式, 且软密封与 硬密封形式仅需更换阀板密封圈 27, 其他零部件可以完全通用, 可以真正实现零流速 快关, 软硬密封互换。 其还在于, 左阀体 1和右阀体 2上均带有斜法兰, 左阀体和右阀体通过法兰和螺 栓连接为一体。 右阀体 2上设置有斜置阀座 8, 斜置阀座 8夹持于左阀体 1的斜法兰 与右阀体 2的斜法兰之间。膜片控制组件 5包括膜片座 9、橡胶膜片 10和阀盖 11, 以 橡胶膜片 10为分界面, 将膜片座 9与阀盖 11组成的腔室分为上下不通水的膜片上腔 和膜片下腔两部分,膜片上腔通过上旁通管 12与阀门出口连通,膜片下腔通过下旁通 管 13与阀门进口连通。 膜片控制组件 5还包括阀杆衬套 14、 阀杆 15和膜片压板 16, 膜片压板 16紧贴在橡胶膜片 10上, 阀杆衬套 14固定在膜片座 9上, 阀杆 15上部穿 过橡胶膜片 10和膜片压板 16并固定在橡胶膜片 10和膜片压板 16组成的叠合件上, 阀杆 15中部套在阀杆衬套 14内, 阀杆 15下端连接在小阀板 4上。 阀杆 15下端设置 有滑块 17, 小阀板 4上设置有滑槽 18或轴孔, 阀杆 15与小阀板 4之间通过滑块 17 和 /或连杆 34进行连接, 阀杆 15通过滑块 17在滑槽 18内滑动保持阀杆 15处于竖直 方向或阀杆 15通过连杆 34保持阀杆 15处于竖直方向。膜片上腔和膜片下腔的容积大 小受阀门进口和阀门出口的水压差影响而变化, 容积的变化驱动阀杆 15 在阀杆衬套 14中作上下运动, 上下运动通过滑块 17传递给小阀板 4, 使小阀板 4绕小阀板销轴 7 作旋转运动。 橡胶膜片 10的上下膜面均设置有膜片压板 16。 斜口、 斜法兰或者斜置 阀座 8与水平面夹角为 40° ~70° 。 小阀板销轴 7处采用无外凸挂碍和周圈骑缝紧定 的防脱机构。 阀轴 6对称设置在大阀板 3两侧, 设置在大阀板 3两侧的阀轴 6与小阀 板销轴 7的轴线同心; 阀轴 6两端分别连接在左阀体 1和大阀板 3上。 阀轴 6—端通 过活动轴连接在左阀体 1上, 另一端通过止推轴承 19、 轴承定位套 20、 轴承 21和端 盖 22连接在大阀板 3上, 阀轴 6对大阀板 3进行定位, 以使大阀板只能沿轴承 21方 向转动而不发生轴向窜动。 阀轴 6和左阀体 1上的限位块限制大阀板 3绕阀轴 6作最 大转角为 45 ° 的旋转运动。 阀轴 6上连接有开度指示装置。 开度指示装置包括开度定 位柱 23、 开度指示杆 24、 开度指针 25和开度标牌 26, 开度定位柱 23设置在阀轴 6 与大阀板 3连接的部位; 开度指示杆 24设置在中空的阀轴 6内; 开度指示杆 24—端 连接开度定位柱 23, 另一端露出阀轴 6并且穿过端盖 22, 穿过端盖 22的开度指示杆 24上装有开度指针 25, 开度指针 25指示在开度标牌 26上。大阀板 3的迎水面外圆部 位安装有阀板密封圈 27, 阀板密封圈 27与斜置阀座 8形成一对大阀板密封副: 小阀 板 4的底面安装有小阀板胶圈 28, 小阀板胶圈 28与大阀板 3缓闭阀口 a安装的缓闭 阀座 29形成一对缓闭阀口密封副。大阀板 3迎水面一侧的外表面设计有流线形水滴状 的凹陷部 30, 所述大阀板 3还设置有配重块。 采用了凹陷部 30和配重块的大阀板 3 经过了重心位置校核, 使大阀板 3保证能在自重作用下完全关闭。 膜片控制组件 5限 制小阀板 4绕小阀板销轴 7作最大转角为 55 ° 的回转运动。 阀杆衬套 14包括阀杆上 衬套 32和阀杆下衬套 33, 阀杆 15同时穿过阀杆上衬套 32和阀杆下衬套 33。 其还在于, 阀杆 15与小阀板 4之间通过连杆进行连接。小阀板 4上还设置有滑槽 18, 阀杆 15与小阀板 4之间通过滑块 17与滑槽 18配合进行连接。 阀杆 15与小阀板 4之间通过滑块 17和连杆 34的组合件配合进行连接。 阀杆 15通过滑块 17在滑槽 18 内滑动或者通过连杆 34保持阀杆 15处于竖直方向。 膜片上腔和膜片下腔的容积大小 受阀门进口和阀门出口的水压差影响而变化, 容积的变化驱动阀杆 15在阀杆衬套 14 中作上下运动, 上下运动通过滑块 17和 /或连杆 34传递给小阀板 4, 使小阀板 4绕小 阀板销轴 7作旋转运动。 其还在于, 增设了大阀板 3的开度指示装置, 且可以方便地加装小阀板 4的行程 开度指示, 能实时显示大小阀板的开度。 其还在于, 大阀板 3的底面挖空形态和背面配重参数经过三维优化设计, 使大阀 板 3沿水流方向的每个截面都接近于低流阻的流线型水滴状, 在阀门开启后, 很小的 正向水流即可维持速闭大阀板 3处于全开位置, 且被限位在全开位置,不随水流抖动, 小阀板 4被完全定位无抖动, 降低了通过阀门的水损。 停泵时, 能灵活转动的大阀板 3在偏心重力矩的作用下能随正向水流的减少而及 时下落到相应位置, 当正向水流接近于零时, 大阀板 3将及时关闭, 从而实现零流速 关阀截断 95%以上的通流面积。 受膜片控制组件 5控制的小阀板 4, 采用无外凸周圈骑缝螺钉防脱防松结构, 在 使用中无脱落现象, 无处挂碍水流中的杂物。 在开启初始阶段, 小阀板 4将膜片腔的 水压差传递到大阀板 3, 使大阀板 3的开启速度受控, 实现缓开; 在小阀板 4关闭终 了时, 它将膜片腔的水压差传递到大阀板 3上, 增大大阀板 3的密封比压, 使大阀板 3的关闭更严密不漏。 在水泵初启动时, 阀门保持关闭状态, 为水泵造压, 实现闭阀轻载启泵, 减少水 泵电机的启动电流; 当水泵正常运转进水侧压力上升, 利用阀板两侧的水压差驱动大 小阀板开启, 速闭大阀板 3的最大开启角度与流量和压力相关, 小阀板 4的受膜片上 下腔压差的控制, 只需要 2m的压差即可以保持在最大开度不抖动。 当水泵停机时正 向水流流量和压力下降时, 速闭大阀板 3在自重作用下下落关闭大部分通流面积, 实 现快关截断大量逆流, 大阀板 3全关后, 小阀板 4在膜片控制组件 5的控制下随阀杆 15的受控缓慢下降而关闭泄流孔, 实现慢关以降低水泵反转时间和最高反转转速, 防 止水锤冲击, 同时膜片上腔在容积扩大的过程中能起到吸能腔的作用吸收升压水头, 为水泵机组和管路系统提供消锤保护。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种斜板止回阀, 包括左阀体(1)、 右阀体(2)、 大阀板(3)、 小阀板(4)和 膜片控制组件 (5), 其特征在于,
所述左阀体 (1) 与所述右阀体 (2) 之间通过斜口对接为一体, 斜口倾斜方向为所述斜口的上部向所述右阀体 (2) 方向倾斜, 所述膜片控制组件 (5) 设置在所述左阀体 (1) 上,
所述大阀板 (3) 沿所述斜口布置,
所述大阀板 (3) 处于所述左阀体 (1) 和所述右阀体 (2) 构成的阀腔内, 所述大阀板 (3) 通过阀轴 (6) 悬挂在所述左阀体 (1) 的轴孔上, 所述小阀板 (4) 与所述膜片控制组件 (5) 连接,
所述小阀板(4)通过小阀板销轴 (7)安装在所述大阀板(3) 的缓闭阀口 处。
2. 根据权利要求 1所述的斜板止回阀, 其特征在于, 所述斜口或所述大阀板 (3) 与水平面的夹角为 50° ~65° 。
3. 根据权利要求 2所述的斜板止回阀, 其特征在于, 所述膜片控制组件 (5) 中设置有阀杆 (15),
所述阀杆 (15) 与连杆 (34) 和 /或滑块 (17) 相连,
所述膜片控制组件 (5) 与所述小阀板 (4) 之间通过所述连杆 (34) 和 / 或所述滑块(17)进行连接, 以确保所述膜片控制组件(5)中的所述阀杆(15) 与所述小阀板 (4) 联动。
4. 根据权利要求 3所述的斜板止回阀, 其特征在于, 所述阀轴 (6) 对称设置在所述大阀板 (3) 两侧,
所述阀轴 (6) 与所述阀杆 (15) 配合面设置有用于所述大阀板 (3) 开闭 时起连接作用的轴承 (21);
所述阀轴 (6) 的端面设置有止推轴承 (19); 所述轴承 (21 ) 和所述止推轴承 (19) 均为自润滑轴承。
5. 根据权利要求 4所述的斜板止回阀, 其特征在于, 所述大阀板 (3 ) 靠所述右阀体 (2) 的一侧的外表面设置有内凹流线形的 凹陷部 (30); 所述大阀板 (3 ) 还设置有配重块; 采用了所述凹陷部(30)和所述配重块的所述大阀板(3 )经过了重心位置 校核, 以使所述大阀板 (3 ) 能在自重作用下完全关闭;
所述小阀板 (4) 板面面积是所述大阀板 (3 ) 板面面积的 3%-10%。
6. 根据权利要求 5所述的斜板止回阀, 其特征在于, 所述的左阀体 (1 ) 与所述右阀体 (2) 之间设置有斜置阀座 (8), 所述大阀板 (3 ) 上设置有阀板密封圈 (27),
所述阀板密封圈 (27) 与所述斜置阀座 (8) 形成一对大阀板密封副; 所述大阀板密封副采用球面与锥面接触密封形式进行密封;
所述阀板密封圈 (27) 采用金属硬密封材料和 /或软密封材料。
7. 根据权利要求 6所述的斜板止回阀, 其特征在于, 所述左阀体 (1 ) 和所述右阀体 (2) 的斜口上均带有斜法兰, 所述斜置阀座(8)夹持于所述左阀体(1 ) 的斜法兰与所述右阀体(2) 的 斜法兰之间,
所述斜置阀座 (8) 为可拆卸部件或者不可拆卸的一体化组件。
8. 根据权利要求 1至 7中任一项所述的斜板止回阀, 其特征在于, 所述斜板止回阀底部设置有预留接口,
所述预留接口上安装有封盖或者阻尼器。
9. 根据权利要求 1至 7中任一项所述的斜板止回阀, 其特征在于, 所述阀轴 (6) 上连接有开度指示装置,
所述开度指示装置包括开度定位柱(23 )、开度指示杆(24)、开度指针(25 ) 和开度标牌 (26), 所述开度定位柱 (23 ) 设置在所述阀轴 (6) 与所述大阀板 (3 ) 连接的部 位;
所述开度指示杆 (24) 设置在中空的所述阀轴 (6) 内;
所述开度指示杆(24)—端连接所述开度定位柱(23 ), 另一端露出所述阀 轴 (6) 并且穿过端盖 (22), 穿过所述端盖 (22) 的所述开度指示杆 (24) 上装有开度指针 (25 ), 所述开度指针 (25 ) 指示在所述开度标牌 (26) 上; 或者开度指示装置上还安装有信号传送装置。 根据权利要求 1至 7中任一项所述的斜板止回阀, 其特征在于,
所述膜片控制组件 (5 ) 包括膜片座 (9)、 橡胶膜片 (10) 和阀盖 (11 ), 以所述橡胶膜片 (10) 为分界面, 将所述膜片座(9) 与所述阀盖(11 )组 成的腔室分为上下不通水的膜片上腔和膜片下腔两部分,
所述膜片上腔通过上旁通管 (12) 与阀门出口连通,
所述膜片下腔通过下旁通管 (13 ) 与阀门进口连通;
所述膜片控制组件(5 )还包括阀杆衬套(14)、阀杆(15 )和膜片压板(16), 所述膜片压板 (16) 紧贴在所述橡胶膜片 (10) 上,
所述阀杆衬套 (14) 固定在所述膜片座 (9) 上,
所述阀杆 (15 ) 上部穿过所述橡胶膜片 (10) 和所述膜片压板 (16) 并固 定在所述橡胶膜片 (10) 和所述膜片压板 (16) 组成的叠合件上, 所述阀杆 (15 ) 中部套在所述阀杆衬套 (14) 内,
所述阀杆 (15 ) 下端连接在所述小阀板 (4) 上;
所述阀杆 (15 ) 下端设置有滑块 (17) 和 /或连杆 (34);
所述阀杆 (15 ) 与所述小阀板 (4) 之间通过所述连杆 (34) 进行连接, 或者所述小阀板 (4) 上还设置有滑槽 (18), 所述阀杆 (15 ) 与所述小阀 板 (4) 之间通过所述滑块 (17) 与所述滑槽 (18) 配合进行连接,
或者所述阀杆(15 )与所述小阀板(4)之间通过所述滑块(17)和所述连 杆 (34) 的组合件配合进行连接; 所述阀杆 (15) 通过所述滑块 (17) 在所述滑槽 (18) 内滑动或者通过所 述连杆 (34) 保持所述阀杆 (15) 处于竖直方向; 所述膜片上腔和所述膜片下腔的容积大小受阀门进口和阀门出口的水压差 影响而变化, 容积的变化驱动所述阀杆 (15) 在所述阀杆衬套 (14) 中作上下 运动, 上下运动通过所述滑块 (17) 和 /或连杆 (34) 传递给所述小阀板 (4), 使所述小阀板 (4) 绕所述小阀板销轴 (7) 作旋转运动。
11. 根据权利要求 1至 7中任一项所述的斜板止回阀, 其特征在于,
所述阀轴 (6) —端通过活动轴连接在所述左阀体 (1) 上, 另一端通过平 面止推轴承 (19)、 轴承定位套 (20)、 阀板轴承 (21) 和端盖 (22) 连接在所 述大阀板 (3) 上,
所述阀轴 (6)对所述大阀板(3)进行定位, 以使所述大阀板(3)只能沿 所述阀板轴承 (21) 方向转动而不发生轴向窜动;
所述阀轴 (6) 限制所述大阀板 (3) 绕所述阀轴 (6) 作最大转角为 45° 的旋转运动。
12. 根据权利要求 1至 7中任一项所述的斜板止回阀, 其特征在于, 所述膜片控制组件 (5) 还包括阀杆衬套 (14);
所述阀杆衬套 (14) 包括阀杆上衬套 (32) 和阀杆下衬套 (33), 所述阀杆 (15) 同时穿过所述阀杆上衬套 (32) 和所述阀杆下衬套 (33)。
13. 一种斜板止回阀, 包括大阀板 (3) 和小阀板 (4), 其特征在于, 还包括膜片控制组件 (5),
所述小阀板 (4) 与所述膜片控制组件 (5) 连接;
所述膜片控制组件 (5) 中设置有阀杆 (15),
所述阀杆 (15) 下端设置有滑块 (17) 和 /或连杆 (34);
所述阀杆 (15) 与所述小阀板 (4) 之间通过所述连杆 (34) 进行连接, 或者所述小阀板 (4) 上还设置有滑槽 (18), 所述阀杆 (15) 与所述小阀 板 (4) 之间通过所述滑块 (17) 与所述滑槽 (18) 配合进行连接, 或者所述阀杆(15)与所述小阀板(4)之间通过所述滑块(17)和所述连 杆 (34) 的组合件配合进行连接。
14. 根据权利要求 13所述的斜板止回阀, 其特征在于, 斜板止回阀包括左阀体 (1) 和右阀体 (2); 所述左阀体 (1) 与所述右阀体 (2) 之间通过斜口对接为一体, 斜口倾斜方向为所述斜口上部向所述右阀体 (2) 方向倾斜,
所述膜片控制组件 (5) 设置在所述左阀体 (1) 上, 所述大阀板 (3) 沿所述斜口布置,
所述大阀板 (3) 处于所述左阀体 (1) 和所述右阀体 (2) 构成的阀腔内, 所述大阀板 (3) 通过阀轴 (6) 悬挂在所述左阀体 (1) 的轴孔上; 所述小阀板(4)通过小阀板销轴 (7)安装在所述大阀板(3) 的缓闭阀口 处。
15. 根据权利要求 13所述的斜板止回阀, 其特征在于, 所述膜片控制组件(5)包括膜片座(9)、橡胶膜片(10)、膜片压板(16)、 阀盖 (11)、 滑块 (17) 和阀杆衬套 (14),
所述膜片压板(16)和所述橡胶膜片 (10)设置在所述膜片座(9)和所述 阀盖 (11) 组成的膜片腔内,
所述膜片压板 (16) 分别紧贴所述橡胶膜片 (10) 的上下膜面, 所述膜片压板 (16) 与橡胶膜片 (10) 组成的叠合件与所述阀杆 (15) 顶 端固定;
所述橡胶膜片 (10) 将膜片腔分为上下不连通的膜片上腔和膜片下腔; 通过上旁通管(12)和下旁通管(13), 膜片上腔与阀门出口的管道、 膜片 下腔与阀门进口的管道分别连通。
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