CN115013543B - High-tightness butterfly valve with scale removal function - Google Patents
High-tightness butterfly valve with scale removal function Download PDFInfo
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- CN115013543B CN115013543B CN202210643047.4A CN202210643047A CN115013543B CN 115013543 B CN115013543 B CN 115013543B CN 202210643047 A CN202210643047 A CN 202210643047A CN 115013543 B CN115013543 B CN 115013543B
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- butterfly plate
- valve rod
- valve
- butterfly
- bevel gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a high-tightness butterfly valve with a scale cleaning function, which comprises a valve body, a valve seat, a butterfly plate and a valve rod, wherein the butterfly plate is formed by overlapping a first butterfly plate and a second butterfly plate, the butterfly plate has three degrees of freedom relative to the valve seat, and the first degree of freedom is rotated around the axis of the valve rod to realize the overturning movement of the butterfly plate; the second degree of freedom is that the butterfly plate rotates around the central axis of the butterfly plate and generates relative motion with the valve seat so as to clean scale at the contact part; the third degree of freedom is the linear motion of butterfly plate on self central axis for the clearance of butterfly plate and disk seat is changeable, produces the clamp force between butterfly plate and the disk seat when closed, and rotatory propulsion action between butterfly plate and the disk seat can clear away the incrustation scale of butterfly plate and disk seat contact portion effectively, and after butterfly plate and the laminating of disk seat, can guarantee to keep certain precompaction force between butterfly plate and the disk seat, can improve the leakproofness between butterfly plate and the disk seat effectively, has overcome the defect that traditional butterfly valve is poor because of the leakproofness that the structure leads to.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a high-tightness butterfly valve with a scale cleaning function.
Background
The butterfly valve is also called as a flap valve, is a regulating valve with simple structure, can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, and mainly plays roles of cutting off and throttling on a pipeline. The butterfly valve mainly comprises a valve body, a valve rod, a butterfly plate and a sealing ring, wherein the valve body is cylindrical, the axial length is short, the built-in opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the purpose of opening and closing or adjusting is achieved.
Butterfly valves are flexible and rigid in seal form. Soft seals are typically rubber ring seals and hard seals are typically metal ring seals. However, the butterfly valve has the disadvantage of poor sealing performance due to the small contact area between the butterfly plate and the valve seat and the lack of external pressing force.
In addition, when the butterfly valve is applied to a sewage and raw water system, a serious scaling phenomenon can occur, and particularly in northern areas of China, the scaling phenomenon is more serious due to alkalescence and higher hardness of water. The scale is different from scaling in high-temperature boilers and other equipment, but is similar to a valve rod and a sealing pair of an opening and closing member, which are attached to a butterfly valve in a mineral crystallization way, so that the scale is strong in adhesive force, difficult to clean, the sealing of the valve is affected, the valve is blocked, the opening and closing torque of the valve is increased, and the valve cannot be opened or closed and has a failure function when serious.
Disclosure of Invention
The invention aims to provide a high-tightness butterfly valve with a scale cleaning function, which can automatically clean scale at the contact part of a butterfly plate and a valve seat in the opening and closing process of the butterfly valve, and maintain certain pressure between the butterfly plate and the valve seat after the butterfly valve is closed, so that the tightness of a sealing pair of the butterfly plate and the valve seat is improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
the butterfly valve with the high sealing degree comprises a valve body, a valve seat, a butterfly plate and a valve rod, wherein the butterfly plate is formed by overlapping a first butterfly plate and a second butterfly plate, a longitudinal valve rod is arranged between the first butterfly plate and the second butterfly plate, the first butterfly plate and the second butterfly plate have three degrees of freedom relative to the valve seat, and the first degree of freedom is rotation around the axis of the valve rod so as to realize overturning movement of the butterfly plate; the second degree of freedom is that the first butterfly plate and the second butterfly plate rotate around the central axis of the first butterfly plate and the second butterfly plate respectively and generate relative motion with the valve seat so as to clean scale at the contact part; the third degree of freedom is the linear motion of the first butterfly plate and the second butterfly plate on the central axis of the first butterfly plate and the second butterfly plate, so that the gap between the butterfly plate and the valve seat is variable, and a pressing force is generated between the butterfly plate and the valve seat when the butterfly plate is closed.
Further, the valve rod is a cross valve rod, a transverse shaft is vertically arranged on the longitudinal shaft, the lower end of the longitudinal shaft of the cross valve rod is arranged at the bottom of the inner cavity of the valve body, the longitudinal shaft of the cross valve rod can rotate around the axis of the valve rod, a rotary sleeve is sleeved at the upper end of the longitudinal shaft of the cross valve rod, the top end of the rotary sleeve extends out of the inner cavity of the valve body, an opening and closing driving device is arranged at the top end of the rotary sleeve, the rotation of the rotary sleeve is controlled through the opening and closing driving device, and the first butterfly plate and the second butterfly plate are arranged on the transverse shaft of the cross valve rod. The rotation action of the rotating sleeve can drive the first butterfly plate and the second butterfly plate to act. The opening and closing driving device comprises a worm wheel, a worm and a rotating shaft, wherein the worm wheel is connected with a rotating sleeve, the worm wheel is matched with the worm, the input end of the worm is the rotating shaft, and the rotating shaft is connected with a power source.
Further, the lower extreme fixedly connected with first bevel gear of swivel sleeve, swivel sleeve together with first bevel gear can be around the axis rotation of cross valve rod vertical axis, is provided with second bevel gear and third bevel gear respectively at cross valve rod's cross axle both ends, and second bevel gear and third bevel gear can be around the axis rotation of cross valve rod's cross axle, first bevel gear simultaneously with second bevel gear and third bevel gear meshing be provided with the depressed part in the center department of butterfly plate, be provided with the external spline axle in the depressed part, external spline axle excircle has the spline, and the center is the screw hole, has the screw thread that revolves the opposite direction at the both ends of cross axle, external spline axle and cross axle threaded connection, is provided with the internal spline sleeve in the outside of second bevel gear and third bevel gear fixedly, and the internal spline sleeve suit is on the external spline axle, and external spline axle and internal spline sleeve cooperate, can transmit the moment of torsion and keep the degree of freedom of axis direction simultaneously, be provided with elastic reset piece and spacing piece on the vertical axis of cross valve rod, elastic reset piece is the torsional spring, spacing piece is the locating pin, under the cross no effect state, cross valve rod axis coincidence with the valve seat.
The working principle of the invention is as follows:
the butterfly plate is tightly attached to the valve seat, and the valve is in a closed state. If the valve is to be opened, the rotary sleeve rotates to enter a first stage, the spring force of the torsion spring acts on the cross valve rod to enable the cross valve rod to keep motionless, the first bevel gear drives the second bevel gear and the third bevel gear to rotate respectively, the rotating directions are opposite, the inner spline sleeve at the back of the second bevel gear drives the outer spline shaft on the first butterfly plate to rotate together, namely the first butterfly plate rotates around the axis of the cross valve rod cross shaft, the outer spline shaft on the first butterfly plate is connected with the valve rod cross shaft through threads, so that the first butterfly plate moves along the axis direction of the cross shaft in the rotating process of the first butterfly plate, the first butterfly plate can be controlled to move towards the direction close to the longitudinal axis of the cross valve rod through setting the screw thread rotation direction, the second butterfly plate and the first butterfly plate are symmetrical relative to the longitudinal axis of the cross valve rod, the movement principle is the same, the first butterfly plate and the second butterfly plate are close to each other, and finally extremely limited, and the gap between the butterfly plate and the valve seat is enlarged; and then, entering a second stage, controlling the rotary sleeve to rotate continuously in the previous direction, stopping relative movement among the first bevel gear, the second bevel gear and the third bevel gear because the first butterfly plate and the second butterfly plate are closed and cannot continuously reduce the distance between the first butterfly plate and the second butterfly plate, starting to overturn along the axial direction of the longitudinal axis of the cross valve rod as a whole, and overcoming the spring force of a torsion spring in the overturning process. After the first butterfly plate and the second butterfly plate are turned over by 90 degrees, the valve is in an open state.
When the valve is in an open state and needs to be closed, the rotary sleeve rotates in the opposite direction, and at the third stage, under the action of the torsion spring, the first butterfly plate and the second butterfly plate can reversely overturn as a whole until the limiting pin reaches the limit, and at the moment, the axis of the transverse shaft of the cross valve rod coincides with the axis of the valve seat; entering the fourth stage, because the cross valve rod keeps static under the combined action of the torsional spring and the limiting pin, the rotary sleeve continuously rotates, the first bevel gear drives the second bevel gear and the third bevel gear to rotate, the action of the stage is opposite to that of the first stage, the principle is the same, and the first butterfly plate and the second butterfly plate are respectively pushed to the corresponding valve seats and are accompanied with rotary action in the pushing process.
The invention has the beneficial effects that:
according to the invention, the rotary pushing action between the butterfly plate and the valve seat in the fourth stage can effectively remove scale at the contact part of the butterfly plate and the valve seat, so that the reliability of a sealing pair formed by the butterfly plate and the valve seat is ensured; after the butterfly plate is attached to the valve seat, the butterfly plate is continuously pushed for a certain distance, a certain pre-compression force can be kept between the butterfly plate and the valve seat, the compression force between the butterfly plate and the valve seat is increased through external action, the tightness between the butterfly plate and the valve seat can be effectively improved, namely, the tightness of the whole valve is improved, and the defect that the tightness of a traditional butterfly valve is poor due to the structure is overcome.
Drawings
The invention is described in further detail below with reference to the drawings and the detailed description.
FIG. 1 is a schematic view of a valve of the present invention in a closed state.
FIG. 2 is a schematic view showing the structure of the butterfly plate in the contracted state of the present invention.
Fig. 3 is a schematic view of the structure of the valve in the open state of the present invention.
Fig. 4 is a partial enlarged view of fig. 2.
Fig. 5 is a schematic cross-sectional view of the drive section of the butterfly plate.
In the figure: 1- -a valve body; 2- -valve seat; 3- -a butterfly plate; 301—a first butterfly plate; 302- -a second butterfly plate; 4- -a cross valve rod; 401—the horizontal axis; 5- -rotating sleeve; 6- -sealing filler; 7- -a worm gear; 8- -a worm; 9- -a rotating shaft; 10- -a wheel; 11—a first bevel gear; 12—a second bevel gear; 13—a third bevel gear; 14- -a stop collar; 15- -torsion spring; 16- -a stop pin; 17-an external spline shaft; 18-an internally splined sleeve.
Detailed Description
As shown in fig. 1 to 3, a high-tightness butterfly valve with a scale cleaning function comprises a valve body 1, a valve seat 2, a butterfly plate 3 and a valve rod, wherein the butterfly plate 3 is formed by superposing a first butterfly plate 301 and a second butterfly plate 302, the first butterfly plate 301 and the second butterfly plate 302 are respectively in a disc shape with a concave part in the middle, a longitudinal valve rod is arranged between the first butterfly plate 301 and the second butterfly plate 302, the first butterfly plate 301 and the second butterfly plate 302 have three degrees of freedom relative to the valve seat, and the first degree of freedom is rotation around the axis of the valve rod to realize overturning movement of the butterfly plate 3; the second degree of freedom is that the first butterfly plate 301 and the second butterfly plate 302 respectively rotate around the central axis of the first butterfly plate and the second butterfly plate, and relative movement is generated between the first butterfly plate and the valve seat 2 so as to clean scale at the contact part; the third degree of freedom is linear motion of the first butterfly plate 301 and the second butterfly plate 302 on the central axes thereof, so that the clearance between the butterfly plate 3 and the valve seat 2 is variable, and a pressing force is generated between the butterfly plate 3 and the valve seat 2 when the butterfly plate is closed.
Further, the valve rod is a cross valve rod 4, a transverse shaft 401 is vertically arranged on the longitudinal shaft, the lower end of the longitudinal shaft of the cross valve rod 4 is arranged at the bottom of the inner cavity of the valve body 1, the longitudinal shaft of the cross valve rod 4 can rotate around the axis of the valve rod, a rotary sleeve 5 is sleeved at the upper end of the longitudinal shaft of the cross valve rod 4, the top end of the rotary sleeve 5 extends out of the inner cavity of the valve body 1, an opening and closing driving device is arranged at the top end of the rotary sleeve 5, the rotation of the rotary sleeve 5 is controlled through the opening and closing driving device, and the first butterfly plate 301 and the second butterfly plate 302 are arranged on the transverse shaft 401 of the cross valve rod 4. The rotation of the rotating sleeve 5 can drive the first butterfly plate 301 and the second butterfly plate 302 to act.
The opening and closing driving device comprises a worm wheel 7, a worm 8 and a rotating shaft 9, wherein the worm wheel 7 is connected with a rotating sleeve 5, the worm wheel 7 is matched with the worm 8, the input end of the worm 8 is the rotating shaft 9, the rotating shaft 9 is connected with a power source, the power source can be an electric device, a pneumatic device or a manual device, and the power source in the figure is a manual rotating wheel 10. The worm and gear structure can increase torque, so that enough power is provided for the opening and closing actions of the valve, and in addition, the worm and gear structure has self-locking property and can be kept in the state of opening or closing the valve.
The joint of the rotary sleeve 5 and the valve body 1 is provided with a sealing filler 6, so that the tightness between the rotary sleeve 5 and the valve body 1 is ensured.
Further, the lower end of the rotary sleeve 5 is fixedly connected with a first bevel gear 11, the rotary sleeve 5 and the first bevel gear 11 can rotate around the axis of the longitudinal axis of the cross valve rod 4, two ends of the transverse shaft 401 of the cross valve rod 4 are respectively provided with a second bevel gear 12 and a third bevel gear 13, the second bevel gear 12 and the third bevel gear 13 can rotate around the axis of the transverse shaft 401 of the cross valve rod 4, the first bevel gear 11 is meshed with the second bevel gear 12 and the third bevel gear 13 at the same time, a concave part is arranged at the center of the butterfly plate 3, an external spline shaft 17 is arranged at the concave part, the external spline shaft 17 is externally provided with a spline, the center is a threaded hole, two ends of the transverse shaft 401 are provided with threads with opposite rotation directions, the external spline shaft 17 is in threaded connection with the transverse shaft 401, the outer sides of the second bevel gear 12 and the third bevel gear 13 are fixedly provided with an internal spline sleeve 18, the internal spline sleeve 18 is sleeved on the external spline shaft 17 and is matched with the internal spline sleeve 18, the degree of freedom of transmitting torque and simultaneously maintaining the axis direction is arranged on the longitudinal axis 4, and a reset piece is arranged on the longitudinal axis of the cross valve rod.
Preferably, the elastic restoring member is a torsion spring 15, and the limiting member is a limiting pin 16, and in a state that the cross valve rod 4 has no external force, the transverse axis 401 of the cross valve rod 4 coincides with the axis of the valve seat 2.
The working principle of the invention is as follows:
as shown in fig. 1, the first butterfly plate 301 and the second butterfly plate 302 are respectively tightly attached to the valve seat 2, and the valve is in a closed state. If the valve is to be opened, the opening and closing driving device controls the rotary sleeve 5 to start rotating, and in the initial stage, the spring force of the torsion spring 15 acts on the cross valve rod 4 to keep the cross valve rod 4 motionless, the first bevel gear 11 drives the second bevel gear 12 and the third bevel gear 13 to rotate respectively, the rotation directions are opposite, the inner spline sleeve 18 at the back of the second bevel gear 12 drives the outer spline shaft 17 on the first butterfly plate 301 to rotate together, namely the first butterfly plate 301 rotates around the axis of the cross valve rod 4 cross shaft 401, and the outer spline shaft 17 on the first butterfly plate 301 is connected with the cross valve rod 4 cross shaft 401 through threads, so that in the rotating process of the first butterfly plate 301, the first butterfly plate 301 moves along the axis direction of the cross valve rod 401, the second butterfly plate 302 and the first butterfly plate 301 can be controlled to move towards the direction close to the longitudinal axis of the cross valve rod 4, the second butterfly plate 302 and the first butterfly plate 301 are symmetrical relative to the longitudinal axis of the cross valve rod 4, the movement principle is the same, the first butterfly plate 301 and the second butterfly plate 302 are close to each other, finally extremely limited, the first butterfly plate 301 and the second butterfly plate 302 are propped against the longitudinal axis of the cross valve rod 4, and the cross valve rod 3 and the valve seat 2 are in a larger state as shown in the figure 2; next, the second stage is entered, the rotation sleeve 5 is controlled to rotate continuously in the previous stage, the first butterfly plate 301 and the second butterfly plate 302 are closed, the distance between the first bevel gear 11, the second bevel gear 12 and the third bevel gear 13 cannot be reduced continuously, the first butterfly plate 301 and the second butterfly plate 302 start to overturn along the axial direction of the longitudinal axis of the cross valve rod 4 as a whole, the overturning process overcomes the spring force of the torsion spring 15, and the gap between the butterfly plate 3 and the valve seat 2 is enlarged in the retracting process of the first butterfly plate 301 and the second butterfly plate 302 in the previous stage, so that the first butterfly plate 301 and the second butterfly plate 302 have enough rotation space, and interference with the valve seat 2 cannot occur in the overturning process. After the first butterfly plate 301 and the second butterfly plate 302 are turned 90 °, the valve is in an open state as shown in fig. 3.
When the valve is in an open state and needs to be closed, the opening and closing driving device controls the rotary sleeve 5 to rotate in the opposite direction, and in the third stage, under the action of the torsion spring 15, the first butterfly plate 301 and the second butterfly plate 302 can reversely overturn as a whole until the limit pin 16 reaches the limit, and at the moment, the axis of the transverse shaft 401 of the cross valve rod 4 coincides with the axis of the valve seat 2, and the state is shown in fig. 2; entering the fourth stage, at this moment, because the cross valve rod 4 keeps static under the combined action of the torsion spring 15 and the limiting pin 16, the rotary sleeve 5 continues to rotate, the first bevel gear 11 drives the second bevel gear 12 and the third bevel gear 13 to rotate, the operation of the stage is opposite to that of the first stage, the principle is the same, and not described in detail, the first butterfly plate 301 and the second butterfly plate 302 are respectively pushed to the corresponding valve seat 2, and in the pushing process, along with the rotary pushing action, the scale of the contact part between the butterfly plate 3 and the valve seat 2 can be effectively removed, so that the reliability of a sealing pair formed by the butterfly plate 3 and the valve seat 2 is ensured, the butterfly plate 3 continues to push for a certain distance after the butterfly plate 3 is attached to the valve seat 2, a certain pressing force is ensured to be maintained between the butterfly plate 3 and the valve seat 2, the sealing degree between the butterfly plate 3 and the valve seat 2 can be effectively improved by increasing the pressing force between the butterfly plate 3 and the valve seat 2 through external action, namely the sealing degree of the whole butterfly valve is improved, and the defect of poor sealing performance caused by the traditional structure is overcome.
If the valve seat part is more in scale formation, the scale removal operation is insufficient to remove all attached scales in a single opening and closing operation, the actions of the first stage and the fourth stage can be repeatedly completed by reciprocally rotating the rotary sleeve 5, and the scale removal effect is improved in a plurality of times in the self-rotating state of the butterfly plate 3 in the first stage and the fourth stage.
Preferably, the valve seat 2 is a metal ring, belongs to a hard seal, and can bear larger pre-compression force compared with the soft seal of a rubber ring, so that the valve seat is suitable for a high-pressure operation environment.
Preferably, a stop collar 14 is provided at the lower end of the longitudinal axis of the cross valve stem 4, the stop collar 14 serving to limit the stop position of the first butterfly plate 301 and the second butterfly plate 302 at the end of the first stage.
The foregoing disclosure is merely illustrative of specific embodiments of this patent and this patent is not to be construed as limiting, since modifications will be apparent to those skilled in the art without departing from the principles of the invention.
Claims (5)
1. The utility model provides a high leakproofness butterfly valve with clear dirt function, includes valve body (1), disk seat (2), butterfly plate (3) and valve rod, its characterized in that: the butterfly plate (3) is formed by superposing a first butterfly plate (301) and a second butterfly plate (302), the first butterfly plate (301) and the second butterfly plate (302) are disc-shaped with a concave part in the middle, a longitudinal valve rod is arranged between the first butterfly plate (301) and the second butterfly plate (302), the first butterfly plate (301) and the second butterfly plate (302) have three degrees of freedom relative to a valve seat, and the first degree of freedom is rotation around the axis of the valve rod so as to realize overturning movement of the butterfly plate (3); the second degree of freedom is that the first butterfly plate (301) and the second butterfly plate (302) respectively rotate around the central axis of the butterfly plate and generate relative movement with the valve seat (2); the third degree of freedom is the linear motion of the first butterfly plate (301) and the second butterfly plate (302) on the central axis of the valve rod, the valve rod is a cross valve rod (4), a transverse shaft (401) is vertically arranged on the longitudinal shaft, the lower end of the longitudinal shaft of the cross valve rod (4) is arranged at the bottom of the inner cavity of the valve body (1), the longitudinal shaft of the cross valve rod (4) can rotate around the axis of the valve rod, a rotating sleeve (5) is sleeved at the upper end of the longitudinal shaft of the cross valve rod (4), the top end of the rotating sleeve (5) extends out of the inner cavity of the valve body (1), an opening and closing driving device is arranged at the top end of the rotating sleeve (5), the rotation of the rotating sleeve (5) is controlled through the opening and closing driving device, the first butterfly plate (301) and the second butterfly plate (302) are arranged on the transverse shaft (401) of the cross valve rod (4), the opening and closing driving device comprises a worm wheel (7), a worm (8) and a rotating shaft (9), the worm (7) is connected with the rotating sleeve (5), the worm (7) is matched with the worm (8), the input end of the worm (8) is provided with the rotating shaft (9), the worm wheel (9) is connected with the worm wheel (9), the lower end of the rotating sleeve (5) is connected with the rotating shaft (11) through the bevel gear (11) and the rotating shaft (11), the novel cross valve comprises a cross valve rod (4), a second bevel gear (12) and a third bevel gear (13) are respectively arranged at two ends of a transverse shaft (401) of the cross valve rod (4), the second bevel gear (12) and the third bevel gear (13) can rotate around the axis of the transverse shaft (401) of the cross valve rod (4), a first bevel gear (11) is meshed with the second bevel gear (12) and the third bevel gear (13) at the same time, a concave part is arranged at the center of a butterfly plate (3), an external spline shaft (17) is arranged at the concave part, a spline is arranged on the outer circle of the external spline shaft (17), the center is a threaded hole, threads with opposite rotation directions are arranged at two ends of the transverse shaft (401), the external spline shaft (17) is in threaded connection with the transverse shaft (401), an internal spline sleeve (18) is fixedly arranged on the outer sides of the second bevel gear (12) and the third bevel gear (13), and an elastic reset piece and a limiting piece are arranged on the longitudinal axis of the cross valve rod (4) in a sleeved mode.
2. The high-tightness butterfly valve with a scale cleaning function according to claim 1, wherein: the sealing filler (6) is arranged at the joint of the rotary sleeve (5) and the valve body (1), so that the tightness between the rotary sleeve (5) and the valve body (1) is ensured.
3. The high-tightness butterfly valve with a scale removal function according to claim 1 or 2, characterized in that: the elastic reset piece is a torsion spring (15), and the limiting piece is a limiting pin (16).
4. The high-tightness butterfly valve with scale removal function according to claim 3, wherein: the valve seat (2) is a metal ring.
5. The high-tightness butterfly valve with a scale removal function according to claim 4, wherein: a limit sleeve (14) is arranged at the lower end of the longitudinal axis of the cross valve rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210643047.4A CN115013543B (en) | 2022-06-08 | 2022-06-08 | High-tightness butterfly valve with scale removal function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210643047.4A CN115013543B (en) | 2022-06-08 | 2022-06-08 | High-tightness butterfly valve with scale removal function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115013543A CN115013543A (en) | 2022-09-06 |
| CN115013543B true CN115013543B (en) | 2023-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210643047.4A Active CN115013543B (en) | 2022-06-08 | 2022-06-08 | High-tightness butterfly valve with scale removal function |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131309A (en) * | 2017-05-24 | 2017-09-05 | 刘晓琦 | A kind of forced seal butterfly valve |
| CN208474520U (en) * | 2018-06-19 | 2019-02-05 | 郑州中特阀门有限公司 | A kind of automatic scale-cleaning butterfly valve |
| CN208587506U (en) * | 2018-05-23 | 2019-03-08 | 山东宏邦流体控制技术有限公司 | A kind of quickly cutting anticorrosive valve |
| CN215059558U (en) * | 2021-07-04 | 2021-12-07 | 天津市塘沽天顺阀门实业有限公司 | Metal sealing butterfly valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9314824B2 (en) * | 2013-11-08 | 2016-04-19 | Mks Instruments, Inc. | Powder and deposition control in throttle valves |
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- 2022-06-08 CN CN202210643047.4A patent/CN115013543B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131309A (en) * | 2017-05-24 | 2017-09-05 | 刘晓琦 | A kind of forced seal butterfly valve |
| CN208587506U (en) * | 2018-05-23 | 2019-03-08 | 山东宏邦流体控制技术有限公司 | A kind of quickly cutting anticorrosive valve |
| CN208474520U (en) * | 2018-06-19 | 2019-02-05 | 郑州中特阀门有限公司 | A kind of automatic scale-cleaning butterfly valve |
| CN215059558U (en) * | 2021-07-04 | 2021-12-07 | 天津市塘沽天顺阀门实业有限公司 | Metal sealing butterfly valve |
Non-Patent Citations (1)
| Title |
|---|
| 对夹式涡轮蝶阀安装及故障解决方法;蒋养辉;;青岛理工大学学报(第06期);第125-128页 * |
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| Publication number | Publication date |
|---|---|
| CN115013543A (en) | 2022-09-06 |
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