CN111365473A - Low-torque long-service-life butterfly valve - Google Patents

Low-torque long-service-life butterfly valve Download PDF

Info

Publication number
CN111365473A
CN111365473A CN202010222776.3A CN202010222776A CN111365473A CN 111365473 A CN111365473 A CN 111365473A CN 202010222776 A CN202010222776 A CN 202010222776A CN 111365473 A CN111365473 A CN 111365473A
Authority
CN
China
Prior art keywords
valve
rod
positioning
valve rod
hole
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.)
Withdrawn
Application number
CN202010222776.3A
Other languages
Chinese (zh)
Inventor
韩国昊
其他发明人请求不公开姓名
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN202010222776.3A priority Critical patent/CN111365473A/en
Publication of CN111365473A publication Critical patent/CN111365473A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • F16K1/221—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 specially adapted operating means therefor
    • 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
    • F16K1/222—Shaping of the valve member
    • 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
    • F16K1/223—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 with a plurality of 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
    • 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
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
    • 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
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2268—Sealing means for the axis of rotation
    • 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
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/228—Movable sealing bodies
    • F16K1/2285—Movable sealing bodies the movement being caused by the flowing medium
    • 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
    • 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
    • F16K1/48—Attaching valve members to screw-spindles
    • F16K1/482—Attaching valve members to screw-spindles with a collar on the spindle or a groove in the spindle, by which a fixing element is supported, the spindle reaching into the valve member
    • 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
    • F16K1/50—Preventing rotation of 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0218—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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/60—Handles
    • 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
    • F16K35/00—Means to prevent accidental or unauthorised actuation
    • F16K35/02—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action
    • F16K35/022—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action the locking mechanism being actuated by a separate actuating element
    • F16K35/025—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action the locking mechanism being actuated by a separate actuating element said actuating element being operated manually (e.g. a push-button located in the valve actuator)
    • 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
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/024—Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve
    • 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
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/028—Devices for relieving the pressure on the sealing faces for lift valves with pivoted closure members, e.g. butterfly valves

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

The invention discloses a butterfly valve with low torque and long service life, which comprises a valve body, wherein a channel is arranged in the valve body, a shaft rod with one end extending into the channel is arranged on the outer side surface of the valve body, the end of the shaft rod extending into the channel is rotatably connected with a valve plate assembly, the valve plate assembly comprises a valve plate, and the circumferential side surface of the valve plate is provided with a rubber cylinder; an upper lug is arranged on the left end face of the valve plate, a rotating shaft hole with an opening at the upper end is arranged in the upper lug, a valve rod with the lower end extending into the channel is arranged on the outer side face of the valve body along the radial direction of the channel, and the lower end of the valve rod penetrates through the rotating shaft hole; an annular convex shoulder is arranged on the side surface of the valve rod along the radial direction, and a rod cavity is formed between the annular convex shoulder and the bottom of the rotating shaft hole; a first face gear is arranged at the lower end of the upper lug, and a second face gear is fixedly mounted on the valve rod; a first positioning assembly is arranged in the valve body, and a second positioning assembly is arranged on the valve body; the butterfly valve with low torque and long service life is simple in structure and good in sealing effect.

Description

Low-torque long-service-life butterfly valve
Technical Field
The invention belongs to the technical field of pipeline valves, and particularly relates to a butterfly valve with low torque and long service life.
Background
The butterfly valve is also called a flap valve, is a regulating valve with simple structure, and mainly plays a role in cutting off and throttling on a pipeline. The butterfly valve opening and closing piece is a disc-shaped turning plate and rotates around the axis of the butterfly valve opening and closing piece in the valve body, so that the opening and closing or adjusting purpose is achieved. When the butterfly valve is used for a large-diameter pipeline, particularly under a high-pressure working condition, the pressure generated by a medium in the pipeline on the butterfly plate is very large, when the butterfly valve is opened, the torque borne by the valve rod is very large, the torque when the valve is required to be opened is also very large, and the output torque of a matched driving device is correspondingly very large, so that the structure of the valve is huge; when the valve body is opened from a closed state, because the pressure in the valve body is high, a worker can still have high torque when pulling the handle, the handle is difficult to open, and high working difficulty is brought to the worker. In addition, when the butterfly plate is opened and closed, the sealing ring of the butterfly plate and the valve body are always in an extruding and scraping state, the resistance distance is large, the abrasion is fast, the leakage is easy to occur, and the service life of the butterfly valve is shortened; meanwhile, the butterfly plate is stressed unevenly on the side with high pressure, so that the butterfly plate is easy to damage and turn over.
Disclosure of Invention
The invention aims to provide a butterfly valve with low torque and long service life, which is simple in structure and good in sealing effect.
In order to achieve the purpose, the invention provides the following technical scheme:
a low-torque long-life butterfly valve comprises a valve body, wherein a channel is arranged in the valve body, the left end of the channel is an outlet, the right end of the channel is an inlet, a shaft rod with one end extending into the channel is arranged on the outer side surface of the valve body along the radial direction of the channel, one end of the shaft rod extending into the channel is rotatably connected with a valve plate assembly used for controlling the on-off of the channel, the valve plate assembly comprises a valve plate, and the circumferential side surface of the valve plate is provided with a rubber cylinder capable of expanding and retracting; an expansion cavity is formed between the rubber cylinder and the circumferential side surface of the valve plate; an upper lug is arranged on the left end face of the valve plate, a rotating shaft hole with an opening at the upper end is arranged in the upper lug, and the rotating shaft hole and the shaft lever are coaxially arranged; the outer side surface of the valve body is provided with a valve rod of which the lower end extends into the channel along the radial direction of the channel, the valve rod and the shaft rod are coaxially arranged, and the lower end of the valve rod penetrates through the rotating shaft hole; the side surface of the valve rod is provided with an annular convex shoulder which is connected in a rotating shaft hole in a sliding manner along the radial direction, a rod cavity is formed between the annular convex shoulder and the bottom of the rotating shaft hole, and the rod cavity is communicated with the expansion cavity; a first face gear is arranged at the lower end of the upper lug, and a second face gear is fixedly mounted on the valve rod; when the valve rod is positioned at the first position, the rod cavity becomes small, the rubber cylinder expands, and the first end face gear is disengaged from the second end face gear; when the valve rod moves upwards to a second position, the rubber cylinder is enlarged by the rod cavity and shrinks, the first end face gear is meshed with the second end face gear, and the valve rod is rotated to drive the valve plate to rotate; a first positioning assembly is arranged in the valve body and used for positioning the valve rod in a first position or a second position; the upper end of the valve rod is positioned outside the valve body and is provided with a handle, and the handle is fixedly connected with the valve rod along the circumferential direction of the valve rod and is connected with the valve rod in a sliding manner along the axial direction of the valve rod; and a second positioning assembly is arranged on the valve body and used for positioning the handle.
In a further technical scheme, a pressure relief hole is formed in the left end face of the valve plate, an end cover is fixedly mounted at an opening at the left end of the pressure relief hole, a valve port is formed in the right end of the pressure relief hole in the valve plate, and a communication hole communicated with the pressure relief hole is formed in the left end face of the valve plate; a threaded sleeve is rotationally connected in the end cover, a screw rod which is coaxial with the pressure relief hole is connected in the threaded sleeve in an internal thread manner, a valve core for controlling the on-off of the valve port is arranged at one end of the screw rod which is positioned in the pressure relief hole, a slide guide hole is formed in the valve core along the axial direction of the screw rod, and a slide guide rod which extends into the slide guide hole is formed in the end cover along the axial direction of the screw rod; the left end of the threaded sleeve is fixedly provided with a second bevel gear, the lower end of the valve rod is fixedly provided with a first bevel gear, the first bevel gear is meshed with the second bevel gear when the valve rod is at a first position, and the first bevel gear is disengaged from the second bevel gear when the valve rod is at a second position.
In a further technical scheme, a first mounting groove communicated with a channel is formed in the valve body and on the outer side of a valve rod along the axial direction of the valve rod, a second mounting groove is formed in the right side wall of the first mounting groove, two locking plates are symmetrically hinged in the second mounting groove, and two placing grooves corresponding to the locking plates one to one are symmetrically formed in the inner side wall of the channel; a power block is connected in the first mounting groove in a sliding mode along the axial direction of the valve rod and fixedly connected with the valve rod; two power grooves which are in one-to-one correspondence with the locking plates are symmetrically arranged in the power block, and each locking plate is provided with a convex column which extends into the power groove corresponding to the locking plate; when the valve rod was in the first position, the locking plate was used for preventing the valve plate rotation in stretching into the passageway under the effect of projection and power groove, and when the valve rod upwards moved to the second position, the locking plate was in the standing groove of retraction under the effect of projection and power groove.
In a further technical scheme, first through holes communicated with the rod cavity are formed in the upper lug and the valve plate, a one-way valve is installed at an opening at the right end of each first through hole and used for controlling media in the channel to flow into the first through holes; a second through hole used for communicating the first through hole with the expansion cavity is formed in the valve plate; the effect of setting up the check valve is that, when having the pole chamber volume minimum, if because leak and cause there is pole chamber, first through-hole, second through-hole, inflation intracavity pressure low, can carry out the fluid infusion by the automatic check valve entering of medium in the passageway has pole chamber, first through-hole, second through-hole, inflation intracavity.
In a further technical scheme, the first positioning assembly comprises a positioning ball, a positioning hole is formed in the valve body along the radial direction of the valve rod, the positioning ball is located in the positioning hole, and a first positioning spring used for forcing the positioning ball to press the valve rod is arranged in the positioning hole; the outside of valve rod is equipped with first positioning ring groove and second positioning ring groove, when the valve rod was in the primary importance, the locating ball got into first positioning ring inslot, when the valve rod was in the second place, the locating ball got into the second positioning ring inslot.
In a further technical scheme, the outer circumferential side of the valve rod is provided with a limiting sliding groove along the axial direction, and a limiting sliding block extending into the limiting sliding groove is fixedly installed in the handle.
In a further technical scheme, one end of the handle is hinged with a pressure lever, one end of the pressure lever, which is close to the upper end of the valve rod, is provided with a power sliding groove, and the side face of the upper end of the valve rod is provided with a bulge extending into the power sliding groove.
In a further technical scheme, the lateral surface of valve body is equipped with the lug, the outside of the inherent valve rod of lug is equipped with the seal groove, be equipped with the sealing washer of cup jointing on the valve rod in the seal groove, the upper end opening part fixed mounting of seal groove has the plug of cup jointing on the valve rod, the plug is used for preventing that the sealing washer breaks away from the seal groove.
In a further technical scheme, the locating component comprises a locating disc, a locating rod and a second locating spring, the locating disc is fixedly installed at the upper end of the plug, the locating rod is hinged to the handle, the second locating spring is located between the handle and the locating rod, and the second locating spring is used for forcing one end of the locating rod to be inserted into a locating groove in the side face of the outer circumference of the locating disc.
Advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) when the valve plate is closed, the valve rod is driven to move downwards, the volume of the rod cavity is reduced, and the volume of the expansion cavity is increased, so that the rubber cylinder is expanded to completely seal the valve plate and the channel; when the butterfly plate is opened, the valve rod is driven to move upwards, the size of the rod cavity is large, the size of the expansion cavity is small, and the rubber cylinder is completely contracted; therefore, the rubber cylinder can be gradually contracted or expanded when the valve plate is opened or closed, the abrasion of the sealing ring is reduced, and the service life and the sealing performance are prolonged;
(2) before the valve plate is rotated and opened, the valve core opens the valve port, and then the valve plate is opened, so that the operating torque can be reduced, and the adjustment is more convenient;
(3) the locking plate is arranged, so that the valve plate can be locked when the valve plate is closed, and the valve plate is prevented from being overturned and damaged;
(4) the valve rod in the invention can control the valve core to open the valve port, control the valve plate to open or close, and control the expansion and contraction of the rubber cylinder, and the valve rod can complete multiple functions through one part, thereby having ingenious design and saving parts.
Drawings
FIG. 1 is a cross-sectional view of a valve plate of the present invention in a closed position;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view of the valve plate of the present invention as it is about to open;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;
fig. 5 is a structural view of a second face gear in the present invention.
Detailed Description
Referring to fig. 1-5, the butterfly valve with low torque and long service life comprises a valve body 1, wherein a channel 101 is arranged in the valve body 1, the left end of the channel 101 is an outlet, and the right end of the channel 101 is an inlet, a shaft rod 8 with one end extending into the channel 101 is arranged on the outer side surface of the valve body 1 along the radial direction of the channel 101, one end of the shaft rod 8 extending into the channel 101 is rotatably connected with a valve plate assembly used for controlling the on-off of the channel 101, the valve plate assembly comprises a valve plate 2, and a rubber cylinder 7 capable of expanding and retracting is arranged on the circumferential side surface of the valve plate 2; an expansion cavity 22 is formed between the rubber cylinder 7 and the circumferential side surface of the valve plate 2; an upper lug 26 is arranged on the left end face of the valve plate 2, a rotating shaft hole 261 with an opening at the upper end is arranged in the upper lug 26, and the rotating shaft hole 261 and the shaft lever 8 are coaxially arranged; the outer side surface of the valve body 1 is provided with a valve rod 3 of which the lower end extends into the channel 101 along the radial direction of the channel 101, the valve rod 3 and the shaft rod 8 are coaxially arranged, and the lower end of the valve rod 3 penetrates through the rotating shaft hole 261; the side surface of the valve rod 3 is provided with an annular shoulder 31 which is connected in a rotating shaft hole 261 in a sliding mode along the radial direction, a rod cavity 201 is formed between the annular shoulder 31 and the bottom of the rotating shaft hole 261, and the rod cavity 201 is communicated with the expansion cavity 22; a first end face gear 41 is arranged at the lower end of the upper lug 26, and a second end face gear 42 is fixedly installed on the valve rod 3; the first end face gear 41 and the second end face gear 42 are identical in structure; when the valve rod 3 is at the first position, the rod cavity 201 becomes small and the rubber cylinder 7 expands, and the first end face gear 41 is disengaged from the second end face gear 42; when the valve rod 3 moves upwards to the second position, the rubber cylinder 7 is expanded by the rod cavity 201 to shrink, the first end face gear 41 is meshed with the second end face gear 42, and the valve rod 3 is rotated to drive the valve plate 2 to rotate; a first positioning assembly is arranged in the valve body 1 and used for positioning the valve rod 3 at a first position or a second position; the upper end of the valve rod 3 is positioned outside the valve body 1 and is provided with a handle 12, the side surface of the outer circumference of the valve rod 3 is provided with a limiting sliding groove 32 along the axial direction, and a limiting sliding block 33 extending into the limiting sliding groove 32 is fixedly arranged in the handle 12; one end of the handle 12 is hinged with a pressure lever 11, one end of the pressure lever 11 close to the upper end of the valve rod 3 is provided with a power sliding groove 111, and the side surface of the upper end of the valve rod 3 is provided with a protrusion 34 extending into the power sliding groove 111; and a second positioning component is arranged on the valve body 1 and is used for positioning the handle 12.
A pressure relief hole 27 is formed in the left end face of the valve plate 2, an end cover 271 is fixedly installed at an opening at the left end of the pressure relief hole 27, a valve port 272 is formed in the right end of the pressure relief hole 27 in the valve plate 2, and a communication hole 21 communicated with the pressure relief hole 27 is formed in the left end face of the valve plate 2; a threaded sleeve 61 is rotatably connected in the end cover 271, a screw 621 which is coaxial with the pressure relief hole 27 is connected in the threaded sleeve 61, a valve core 62 for controlling the on-off of the valve port 272 is arranged at one end of the screw 621, which is positioned in the pressure relief hole 27, the valve core 62 is axially provided with a slide guide hole 622 along the screw 621, and the end cover 271 is axially provided with a slide guide bar 623 which extends into the slide guide hole 622 along the screw 621; the left end of the threaded sleeve 61 is fixedly provided with a second bevel gear 52, the lower end of the valve rod 3 is fixedly provided with a first bevel gear 51, when the valve rod 3 is at the first position, the first bevel gear 51 is meshed with the second bevel gear 52, and when the valve rod 3 is at the second position, the first bevel gear 51 is disengaged from the second bevel gear 52.
A first installation groove 102 communicated with a channel 101 is formed in the valve body 1 on the outer side of the valve rod 3 along the axial direction of the valve rod 3, a second installation groove 103 is formed in the right side wall of the first installation groove 102, two locking plates 141 and 142 are symmetrically hinged in the second installation groove 103, and two placing grooves 107 and 108 corresponding to the locking plates 141 and 142 one to one are symmetrically formed in the inner side wall of the channel 101; a power block 13 is connected in the first mounting groove 102 in a sliding manner along the axial direction of the valve rod 3, and the power block 13 is fixedly connected with the valve rod 3; two power grooves 131 and 132 which are in one-to-one correspondence with the locking plates 141 and 142 are symmetrically arranged in the power block 13, and each locking plate 141 and 142 is provided with a convex column 14 which extends into the corresponding power groove 131 and 132; when the valve rod 3 is at the first position, the locking pieces 141 and 142 are extended into the channel 101 under the action of the convex column 14 and the power slots 131 and 132 to prevent the valve plate 2 from rotating, and when the valve rod 3 moves upwards to the second position, the locking pieces 141 and 142 are retracted into the placing slots 107 and 108 under the action of the convex column 14 and the power slots 131 and 132.
A first through hole 28 communicated with the rod cavity 201 is formed in the upper lug 26 and the valve plate 2, a check valve 44 is installed at the opening at the right end of the first through hole 28, and the check valve 44 is used for controlling the medium in the channel 101 to flow into the first through hole 28; a second through hole 29 for communicating the first through hole 28 with the expansion cavity 22 is formed in the valve plate 2; the check valve 44 is arranged to allow the medium in the passage 101 to automatically enter the rod chamber 201, the first through hole 28, the second through hole 29 and the expansion chamber 22 through the check valve 44 for fluid replacement if the pressure in the rod chamber 201, the first through hole 28, the second through hole 29 and the expansion chamber 22 is too low due to leakage when the volume of the rod chamber 201 is maximum.
The first positioning component comprises a positioning ball 10, a positioning hole 109 is formed in the valve body 1 along the radial direction of the valve rod 3, the positioning ball 10 is located in the positioning hole 109, and a first positioning spring 45 used for forcing the positioning ball 10 to press the valve rod 3 is arranged in the positioning hole 109; the outside of valve rod 3 is equipped with first positioning ring groove 38 and second positioning ring groove 39, when valve rod 3 was in the primary importance, location ball 10 got into first positioning ring groove 38 in, when valve rod 3 was in the second place, location ball 10 got into in the second positioning ring groove 39.
The lateral surface of valve body 1 is equipped with lug 112, the inside outside of valve rod 3 of lug 112 is equipped with seal groove 113, be equipped with the sealing washer 114 of cup jointing on valve rod 3 in the seal groove 113, the upper end opening part fixed mounting of seal groove 113 has the plug 115 of cup jointing on valve rod 3, plug 115 is used for preventing that sealing washer 114 breaks away from seal groove 113. The positioning assembly comprises a positioning disc 9, a positioning rod 91 and a second positioning spring 92, the positioning disc 9 is fixedly mounted at the upper end of a plug 115, the positioning rod 91 is hinged to the handle 12, the second positioning spring 92 is located between the handle 12 and the positioning rod 91, and the second positioning spring 92 is used for forcing one end of the positioning rod 91 to be inserted into a positioning groove (shown in the prior art) in the outer circumferential side face of the positioning disc 9.
As shown in FIG. 1, when the butterfly valve is in the closed position, one end of the positioning rod 91 is clamped into the positioning groove of the positioning plate 9, the valve rod 3 is in the first position, at this time, the positioning ball enters the first positioning ring groove 38 under the action of the first positioning spring 45, meanwhile, the volume of the rod cavity 201 is minimum, the volume of the expansion cavity 22 communicated with the rod cavity 201 is maximum, the pressure in the expansion cavity 22 acts on the rubber sleeve 7 to completely expand the rubber sleeve 7 to form reliable sealing, in addition, the valve core 62 seals the valve port 272, and the locking plates 141 and 142 block the valve plate 2 to prevent the valve plate 2 from overturning.
When the butterfly valve needs to be opened, the positioning rod 91 is pinched upwards, one end of the positioning rod 91 is separated from the positioning groove of the positioning disc 9, then the handle 12 is rotated, the handle 12 drives the valve rod 3 to rotate, the threaded sleeve 61 is driven to rotate through the meshing of the first bevel gear 51 and the second bevel gear 52, the threaded sleeve 61 drives the valve core 62 to move leftwards through the screw 621 when rotating, the valve port 272 is opened, media at two ends of the valve plate 2 are unloaded, one end of the pressure rod 11 is pressed downwards, the valve rod 3 is moved to the second position, the positioning balls enter the second annular positioning groove under the action of the first positioning spring 45 at the moment, the first end face gear 41 is meshed with the second end face gear 42, in addition, when the valve rod 3 moves upwards, the power block 13 is driven to move upwards, the locking plates 141 and 142 are retracted into the placing grooves 107 and 108 under the action of the convex columns 14 and the power grooves 131 and 132, and the volume of the rod cavity 201 is increased, so, packing element 7 inwards contracts, then twist grip 12, and the rotation of valve rod 3 passes through second terminal surface gear 42 and transmits first terminal surface gear 41 to open valve plate 2, loosen locating lever 91 after valve plate 2 opens, locating lever 91 is gone into in the constant head tank of positioning disk 9 under the effect of second positioning spring 92.
When the butterfly valve needs to be closed, the positioning rod 91 is pinched upwards, one end of the positioning rod 91 is separated from the positioning groove of the positioning disc 9, then the handle 12 is rotated, the valve plate 2 is driven to rotate, the pressing rod 11 is lifted upwards after the valve plate 2 rotates to a closed position, the valve rod 3 moves to a first position, the positioning balls enter the first annular positioning groove under the action of the first positioning spring 45, the first end face gear 41 is separated from the second end face gear 42, and the first bevel gear 51 is meshed with the second bevel gear 52. In addition, when the valve rod 3 moves downwards, the volume of the rod cavity 201 is reduced, so that the pressure in the expansion cavity 22 communicated with the rod cavity 201 is gradually increased to expand and seal the rubber cylinder 7 outwards, meanwhile, the power block 13 moves downwards, the locking plates 141 and 142 extend into the channel 101 under the action of the convex column 14 and the power grooves 131 and 132 to prevent the valve plate 2 from rotating, then the handle 12 is rotated to drive the valve rod 3 to rotate, the second bevel gear 52 is driven to rotate through the first bevel gear 51 when the valve rod 3 rotates, the valve core 62 moves rightwards and is pressed on the valve port 272 through the matching of the screw sleeve 61 and the screw 621 when the second bevel gear 52 rotates, then the positioning rod 91 is released, and the positioning rod 91 is clamped into the positioning groove of the positioning disc 9 under the action of the second positioning spring 92, so that the butterfly valve is closed.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. A butterfly valve with low torque and long service life comprises a valve body, wherein a channel is arranged in the valve body, the left end of the channel is an outlet, the right end of the channel is an inlet, a shaft rod with one end extending into the channel is arranged on the outer side surface of the valve body along the radial direction of the channel, and one end of the shaft rod extending into the channel is rotatably connected with a valve plate assembly used for controlling the on-off of the channel; an expansion cavity is formed between the rubber cylinder and the circumferential side surface of the valve plate; an upper lug is arranged on the left end face of the valve plate, a rotating shaft hole with an opening at the upper end is arranged in the upper lug, and the rotating shaft hole and the shaft lever are coaxially arranged; the outer side surface of the valve body is provided with a valve rod of which the lower end extends into the channel along the radial direction of the channel, the valve rod and the shaft rod are coaxially arranged, and the lower end of the valve rod penetrates through the rotating shaft hole; the side surface of the valve rod is provided with an annular convex shoulder which is connected in a rotating shaft hole in a sliding manner along the radial direction, a rod cavity is formed between the annular convex shoulder and the bottom of the rotating shaft hole, and the rod cavity is communicated with the expansion cavity; a first face gear is arranged at the lower end of the upper lug, and a second face gear is fixedly mounted on the valve rod; when the valve rod is positioned at the first position, the rod cavity becomes small, the rubber cylinder expands, and the first end face gear is disengaged from the second end face gear; when the valve rod moves upwards to a second position, the rubber cylinder is enlarged by the rod cavity and shrinks, the first end face gear is meshed with the second end face gear, and the valve rod is rotated to drive the valve plate to rotate; a first positioning assembly is arranged in the valve body and used for positioning the valve rod in a first position or a second position; the upper end of the valve rod is positioned outside the valve body and is provided with a handle, and the handle is fixedly connected with the valve rod along the circumferential direction of the valve rod and is connected with the valve rod in a sliding manner along the axial direction of the valve rod; and a second positioning assembly is arranged on the valve body and used for positioning the handle.
2. The butterfly valve with low torque and long service life according to claim 1, wherein a pressure relief hole is formed in the left end face of the valve plate, an end cover is fixedly installed at an opening at the left end of the pressure relief hole, a valve port is formed in the right end of the pressure relief hole in the valve plate, and a communication hole communicated with the pressure relief hole is formed in the left end face of the valve plate; a threaded sleeve is rotationally connected in the end cover, a screw rod which is coaxial with the pressure relief hole is connected in the threaded sleeve in an internal thread manner, a valve core for controlling the on-off of the valve port is arranged at one end of the screw rod which is positioned in the pressure relief hole, a slide guide hole is formed in the valve core along the axial direction of the screw rod, and a slide guide rod which extends into the slide guide hole is formed in the end cover along the axial direction of the screw rod; the left end of the threaded sleeve is fixedly provided with a second bevel gear, the lower end of the valve rod is fixedly provided with a first bevel gear, the first bevel gear is meshed with the second bevel gear when the valve rod is at a first position, and the first bevel gear is disengaged from the second bevel gear when the valve rod is at a second position.
3. The butterfly valve with low torque and long service life according to claim 1, wherein a first mounting groove communicated with the channel is formed in the valve body on the outer side of the valve rod along the axial direction of the valve rod, a second mounting groove is formed in the right side wall of the first mounting groove, two locking plates are symmetrically hinged in the second mounting groove, and two placing grooves corresponding to the locking plates in a one-to-one mode are symmetrically formed in the inner side wall of the channel; a power block is connected in the first mounting groove in a sliding mode along the axial direction of the valve rod and fixedly connected with the valve rod; two power grooves which are in one-to-one correspondence with the locking plates are symmetrically arranged in the power block, and each locking plate is provided with a convex column which extends into the power groove corresponding to the locking plate; when the valve rod was in the first position, the locking plate was used for preventing the valve plate rotation in stretching into the passageway under the effect of projection and power groove, and when the valve rod upwards moved to the second position, the locking plate was in the standing groove of retraction under the effect of projection and power groove.
4. The butterfly valve with low torque and long service life according to claim 1, wherein a first through hole communicated with the rod cavity is formed in the upper lug and the valve plate, a check valve is installed at a right end opening of the first through hole, and the check valve is used for controlling media in the channel to flow into the first through hole; and a second through hole used for communicating the first through hole with the expansion cavity is formed in the valve plate.
5. The butterfly valve of claim 1, wherein the first positioning assembly includes a positioning ball, a positioning hole is formed in the valve body in a radial direction of the valve stem, the positioning ball is located in the positioning hole, and a first positioning spring for forcing the positioning ball toward the valve stem is disposed in the positioning hole; the outside of valve rod is equipped with first positioning ring groove and second positioning ring groove, when the valve rod was in the primary importance, the locating ball got into first positioning ring inslot, when the valve rod was in the second place, the locating ball got into the second positioning ring inslot.
6. The butterfly valve of claim 1, wherein the valve rod is provided with a limiting sliding groove along the axial direction on the outer circumferential side surface, and a limiting sliding block extending into the limiting sliding groove is fixedly installed in the handle.
7. The butterfly valve of claim 1 wherein said handle is hinged at one end to a lever, said lever having a power slide slot at an end adjacent to the upper end of the valve stem, said valve stem having a protrusion on a side of the upper end extending into the power slide slot.
8. The butterfly valve with low torque and long service life according to claim 1, wherein a projection is arranged on an outer side surface of the valve body, a sealing groove is arranged on an outer side of the valve rod in the projection, a sealing ring sleeved on the valve rod is arranged in the sealing groove, a plug sleeved on the valve rod is fixedly installed at an upper end opening of the sealing groove, and the plug is used for preventing the sealing ring from being separated from the sealing groove.
9. The butterfly valve of claim 8, wherein the positioning assembly comprises a positioning plate, a positioning rod, and a second positioning spring, the positioning plate is fixedly mounted on the upper end of the plug, the positioning rod is hinged to the handle, the second positioning spring is located between the handle and the positioning rod, and the second positioning spring is used for forcing one end of the positioning rod to be inserted into the positioning groove on the outer circumferential side of the positioning plate.
CN202010222776.3A 2020-03-26 2020-03-26 Low-torque long-service-life butterfly valve Withdrawn CN111365473A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010222776.3A CN111365473A (en) 2020-03-26 2020-03-26 Low-torque long-service-life butterfly valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010222776.3A CN111365473A (en) 2020-03-26 2020-03-26 Low-torque long-service-life butterfly valve

Publications (1)

Publication Number Publication Date
CN111365473A true CN111365473A (en) 2020-07-03

Family

ID=71204796

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010222776.3A Withdrawn CN111365473A (en) 2020-03-26 2020-03-26 Low-torque long-service-life butterfly valve

Country Status (1)

Country Link
CN (1) CN111365473A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113915354A (en) * 2021-11-10 2022-01-11 夏方飞 Butterfly valve and use method thereof
CN114263751A (en) * 2021-12-11 2022-04-01 李岸隆 Scour prevention butterfly valve
CN114704654A (en) * 2022-04-12 2022-07-05 杨兰 Pre-decompression butterfly valve
CN117189885A (en) * 2023-11-06 2023-12-08 德阳市东方恒运电机有限公司 Butterfly valve with protection device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2075733U (en) * 1990-09-04 1991-04-24 中国船舶工业总公司第七研究院第七○四研究所 Automatic seal butterfly valve
CN2311659Y (en) * 1997-10-10 1999-03-24 杨永祥 Relief cut-over butterfly valve
CN2874170Y (en) * 2006-01-17 2007-02-28 石家庄三环阀门股份有限公司 Inflating sealed butterfly valve
CN200986031Y (en) * 2006-12-22 2007-12-05 张长宗 Pressure relief type butterfly valve
CN101298886A (en) * 2008-06-20 2008-11-05 浙江工业大学 Eccentric expansion butterfly valve
CN108180299A (en) * 2017-12-28 2018-06-19 邵立坤 A kind of one-way flow valves
CN110657245A (en) * 2019-10-10 2020-01-07 徐辉 Butterfly valve with enhanced sealing performance
US20200072359A1 (en) * 2018-09-04 2020-03-05 Bueno Technology Co., Ltd. Fluoroplastic butterfly valve structure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2075733U (en) * 1990-09-04 1991-04-24 中国船舶工业总公司第七研究院第七○四研究所 Automatic seal butterfly valve
CN2311659Y (en) * 1997-10-10 1999-03-24 杨永祥 Relief cut-over butterfly valve
CN2874170Y (en) * 2006-01-17 2007-02-28 石家庄三环阀门股份有限公司 Inflating sealed butterfly valve
CN200986031Y (en) * 2006-12-22 2007-12-05 张长宗 Pressure relief type butterfly valve
CN101298886A (en) * 2008-06-20 2008-11-05 浙江工业大学 Eccentric expansion butterfly valve
CN108180299A (en) * 2017-12-28 2018-06-19 邵立坤 A kind of one-way flow valves
US20200072359A1 (en) * 2018-09-04 2020-03-05 Bueno Technology Co., Ltd. Fluoroplastic butterfly valve structure
CN110657245A (en) * 2019-10-10 2020-01-07 徐辉 Butterfly valve with enhanced sealing performance

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113915354A (en) * 2021-11-10 2022-01-11 夏方飞 Butterfly valve and use method thereof
CN114263751A (en) * 2021-12-11 2022-04-01 李岸隆 Scour prevention butterfly valve
CN114704654A (en) * 2022-04-12 2022-07-05 杨兰 Pre-decompression butterfly valve
CN117189885A (en) * 2023-11-06 2023-12-08 德阳市东方恒运电机有限公司 Butterfly valve with protection device
CN117189885B (en) * 2023-11-06 2024-01-09 德阳市东方恒运电机有限公司 Butterfly valve with protection device

Similar Documents

Publication Publication Date Title
CN111365473A (en) Low-torque long-service-life butterfly valve
CN110657245B (en) Butterfly valve with enhanced sealing performance
US4120319A (en) Manifold assembly for compressed air storage tank or the like
CN111188910A (en) Multifunctional stop valve
CN211259779U (en) Piston type pressure reducing valve with direct flow channel
CN111442110A (en) Ball valve
CN111237480A (en) Low-operation-torque butterfly valve
CN111350830A (en) Butterfly valve
CN204512601U (en) Magnetic switch integral valve
CN109780230A (en) A kind of antifreeze pressure release butterfly valve
CN212028576U (en) Adjusting control valve
CN111350831A (en) Butterfly valve
CN106837222B (en) A kind of collection manually and automatically operates in integrated kelly cock
CN111350833A (en) Butterfly valve
CN111219494A (en) Stop valve
CN110657267B (en) Unloading valve with overflow function
CN109630721B (en) High-low pressure switching valve and use method thereof
CN220727126U (en) Novel pipeline gas self-closing valve
CN111536255A (en) High-pressure ball valve
CN111237483A (en) Butterfly valve
CN111520499A (en) Ball valve
CN111173987A (en) Pre-decompression butterfly valve
CN112576228A (en) Fully-sealed balance pressure water nozzle
CN216843289U (en) Safety valve with stop function
CN220082232U (en) Stop valve and inflation system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20200703