CN112963570A - Anti-scouring ball valve - Google Patents

Anti-scouring ball valve Download PDF

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Publication number
CN112963570A
CN112963570A CN202110190910.0A CN202110190910A CN112963570A CN 112963570 A CN112963570 A CN 112963570A CN 202110190910 A CN202110190910 A CN 202110190910A CN 112963570 A CN112963570 A CN 112963570A
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CN
China
Prior art keywords
valve
ball
shaft
connecting rod
drive
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Pending
Application number
CN202110190910.0A
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Chinese (zh)
Inventor
赵传杰
陈璐
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Dongguan Haite Pawo Hydraulic Technology Co ltd
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Dongguan Haite Pawo Hydraulic Technology Co ltd
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Priority to CN202110190910.0A priority Critical patent/CN112963570A/en
Publication of CN112963570A publication Critical patent/CN112963570A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
    • 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
    • F16K35/027—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 pushing or pulling the valve actuator, the valve actuator being rotated subsequently to bring the valve closure element in the desired position
    • 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
    • F16K35/10—Means to prevent accidental or unauthorised actuation with locking caps or locking bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0647—Spindles or 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)

Abstract

The invention belongs to the technical field of pipeline valves, and discloses an anti-scouring ball valve which comprises a valve body, a valve ball, a valve clack, a valve shaft and a driving shaft; the valve body is provided with an inlet and an outlet which are communicated, the valve ball is positioned between the inlet and the outlet, and the valve ball is provided with a through hole; the valve clack is positioned on the valve ball and is relatively movably connected with the valve ball, and can be used for plugging and controlling the opening of the through hole, wherein the outer surface of the valve ball can form a complete spherical surface when the through hole is plugged; the valve shaft is connected with the valve ball so as to drive the valve ball to rotate in a reciprocating manner relative to the valve body and control the communication relationship between the inlet and the outlet; the driving shaft is connected with the valve clack to drive the valve clack to move relatively relative to the valve ball so as to control the on-off of the through hole. The anti-scouring ball valve can completely avoid scouring action of media on a sealing element between the ball valve and the valve body in the opening and closing process, improve the protection of the sealing element and prolong the service life of the whole ball valve.

Description

Anti-scouring ball valve
Technical Field
The invention belongs to the technical field of pipeline valves, and particularly relates to an anti-scouring ball valve.
Background
Ball valves usually use a ball with a circular passage as the opening and closing element, i.e. the opening and closing member of a ball valve is a ball with a through hole, which rotates around an axis perpendicular to the passage, thereby achieving the purpose of opening and closing the passage. Because the ball valve has the advantages of small fluid resistance, simple structure, tightness, reliability, convenient operation, rapid opening and closing, wide application range and the like, the ball valve is widely applied to various departments such as petroleum, chemical engineering, power generation, paper making, atomic energy, aviation, rockets and the like, and in daily life of people.
However, in the existing ball valve, when the ball body is just opened and is closed completely, because the opening area of the flow passage is small, the internal high-pressure medium causes great impact on the sealing element moving relative to the ball body, so that the sealing element is easily damaged, the valve is leaked, and the service life of the whole ball valve is influenced.
Disclosure of Invention
In order to solve the problems of the existing ball valve with the conventional structure, the invention provides an anti-scouring ball valve with a brand new structure. The anti-scouring ball valve comprises a valve body, a valve ball, a valve clack, a valve shaft and a driving shaft; the valve body is provided with an inlet and an outlet which are communicated, the valve ball is positioned between the inlet and the outlet, and the valve ball is provided with a through hole; the valve clack is positioned on the valve ball and is relatively movably connected with the valve ball to plug and open the through hole, wherein when the through hole is plugged, the outer surface of the valve ball can form a complete spherical surface; the valve shaft is connected with the valve ball so as to drive the valve ball to rotate in a reciprocating manner relative to the valve body and control the communication relationship between the inlet and the outlet; the driving shaft is connected with the valve clack to drive the valve clack to move relatively relative to the valve ball.
Preferably, the valve ball is a hollow ball structure, the drive shaft comprises an outer shaft and an inner shaft, and the valve clack is simultaneously connected with the outer shaft and the inner shaft through a traction assembly; when the inner shaft rotates relative to the valve ball in the circumferential direction, the traction assembly can be driven to drive the valve clack to reciprocate along the axial direction of the through hole; when the outer shaft rotates relative to the valve ball in the circumferential direction, the outer shaft can drive the traction assembly to drive the valve clack to rotate around the shaft in the valve ball.
Further preferably, the traction assembly comprises a first connecting rod, a second connecting rod, a torsion spring, a wire wheel and a connecting wire; the wire wheel is coaxially and fixedly connected with the inner shaft, one end of the first connecting rod is rotatably connected with the valve clack, the other end of the first connecting rod is rotatably connected with one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected with the outer shaft; the torsion spring is positioned at the connecting position of the second connecting rod and the outer shaft so as to drive the second connecting rod to rotate relative to the outer shaft, so that the first connecting rod and the second connecting rod form a bending state; one end of the connecting wire is wound and fixed on the wire wheel, and the other end of the connecting wire is connected with the connecting position of the first connecting rod and the second connecting rod so as to drive the second connecting rod to rotate reversely relative to the outer shaft, so that the first connecting rod and the second connecting rod are in the same straight line state.
Further preferably, a ratchet is arranged between the inner shaft and the outer shaft to form unidirectional synchronous rotary connection between the inner shaft and the outer shaft.
Further preferably, a connecting disc is arranged at the end part of the inner shaft, and the ratchet is arranged on the outer shaft; the connecting disc is axially reciprocable relative to the outer shaft to form a selective connection with the ratchet.
Further preferably, a connecting rod and a connecting spring are further arranged at the end part of the inner shaft; the connecting rod is movably connected with the connecting disc, one end of the connecting spring is in contact connection with the connecting disc, and the other end of the connecting spring is in contact connection with the connecting rod so as to drive the connecting rod to move and keep a position connected with the ratchet.
Preferably, the anti-scouring ball valve is also provided with an air bag, the inner shaft adopts a split structure, and the two parts are connected by a return spring; the air bag is in contact with the connecting disc so as to drive the connecting disc to axially move relative to the outer shaft and drive the connecting rod to move to be disconnected from the ratchet; one part of the inner shaft is coaxially and fixedly connected with the connecting disc, the other part of the inner shaft is connected with the traction assembly, and the return spring is positioned between the two parts of the inner shaft so as to drive the connecting disc to be kept connected with the ratchet.
Preferably, the anti-scouring ball valve is also provided with a driving gear, and the connecting disc is provided with external teeth; when the connecting disc is in rotary connection with the ratchet, the driving gear is in meshed connection with the connecting disc holding teeth; when the connecting disc is disconnected with the ratchet, the driving gear is disconnected with the connecting disc.
Preferably, the anti-scouring ball valve is also provided with a handle; the handle is selectively coupled to the valve shaft and the drive shaft to respectively drive the valve shaft and the drive shaft for rotation.
Further preferably, the anti-scouring ball valve is also provided with an arc-shaped groove, a positioning block and an auxiliary positioning piece, and the handle is coaxially and fixedly connected with the driving shaft; the arc-shaped groove is formed in the valve body, one end of the positioning block is fixedly connected with the valve shaft, and the other end of the positioning block extends into the arc-shaped groove and can reciprocate along the arc-shaped groove; the auxiliary positioning piece is positioned between the handle and the valve shaft and forms coaxial rotation selective connection for the handle and the valve shaft; when the auxiliary positioning piece keeps coaxial rotary connection between the handle and the valve shaft, the handle rotates back and forth along the arc-shaped groove through the valve shaft to drive the valve ball to rotate relative to the valve body; when the auxiliary positioning piece releases the coaxial rotary connection between the handle and the valve shaft, the handle drives the driving shaft to control the valve clack to move relative to the valve ball.
Compared with the ball valve with the existing structure, the anti-scouring ball valve has the following beneficial technical effects:
1. in the invention, the valve clack is arranged on the valve ball, the valve clack is controlled by the driving shaft to move relative to the valve ball so as to control the on-off of the through hole on the valve ball, and the valve shaft controls the valve ball to move relative to the valve body so as to control the on-off of the inlet and the outlet. Therefore, the valve clack is controlled to move relative to the valve ball by the driving shaft in advance to block the through hole, the flow of high-pressure medium between the inlet and the outlet is cut off, the valve ball forms a complete outer spherical surface, the valve shaft controls the valve ball to open and close and rotate relative to the valve body, the flow of the high-pressure medium existing in the rotating process of the valve ball relative to the valve body can be completely avoided, and the scouring caused by the flow of the high-pressure medium to the sealing element between the valve ball and the valve body is avoided, so that the opening and closing operation of the ball valve in a non-scouring state is realized, the protection of the sealing element is improved, and the service life and the working reliability.
2. In the invention, under the condition of fixedly connecting the handle and the outer shaft, the inner shaft and the outer shaft are selectively connected by virtue of the connecting disc, the handle and the valve shaft are selectively connected by virtue of the auxiliary positioning piece, meanwhile, the connecting relation between the connecting disc and the inner shaft is controlled by utilizing the air bag connected with the handle, and the connecting disc is controlled by utilizing the driving rod on the handle to rotate reversely, so that the operation control on the valve shaft, the outer shaft and the inner shaft can be intensively completed by the handle, the opening and closing operation control of the anti-scouring ball valve is realized, the number of driving elements in the whole anti-scouring ball valve can be greatly simplified, the structural compactness of the whole anti-scouring ball valve is improved, and the flexibility and the simplicity of the operation are improved.
Drawings
FIG. 1 is a schematic structural view of an anti-erosion ball valve according to the present embodiment, in which a valve flap is in an ejection position;
FIG. 2 is a schematic structural view of a cross section taken along the direction M-M in FIG. 1;
FIG. 3 is a schematic view of a ratchet structure at the end of the outer shaft of the anti-erosion ball valve of the present embodiment;
FIG. 4 is a schematic structural view of the anti-erosion ball valve of the present embodiment when the valve flap is in the retracted position;
FIG. 5 is a schematic view of the cross section taken in the direction N-N of FIG. 4;
fig. 6 is a schematic structural view of a cross section along the direction N-N in fig. 4 when the anti-scouring ball valve of the present embodiment is in an open state.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1 to 6, the anti-erosion ball valve of the present embodiment includes a valve body 1, a valve ball 2, two valve flaps 3, a valve shaft 4, and a drive shaft 5.
The valve body 1 is provided with an inlet 11 and an outlet 12 which are positioned on the same straight line and can be communicated, and the valve ball 2 is positioned between the inlet 11 and the outlet 12 inside the valve body 1 and is movably connected with the valve body 1 in a sealing way through a sealing piece. Meanwhile, a through hole 21 is provided on the valve ball 2 to penetrate in a radial direction thereof, and the through hole 21 is in the same plane as the inlet 11 and the outlet 12. The two valve clacks 3 are respectively positioned at two orifice positions of the through hole 21, and the two valve clacks 3 are respectively and movably connected with the valve ball 2 relatively, so that the through hole 21 can be blocked and opened for control, and the outer surface of the valve ball 2 can form a complete outer spherical surface when the through hole 21 is blocked.
The valve shaft 4 is connected to the valve ball 2 to drive the valve ball 2 to perform reciprocating rotation with respect to the valve body 1, and controls the communication relationship between the inlet 11 and the outlet 12. The driving shaft 5 is connected with the two valve clacks 3 to drive the two valve clacks 3 to move relatively relative to the valve ball 2 so as to control the plugging and the opening of the through hole 21.
When the anti-scouring ball valve needs to be opened, firstly, the driving shaft drives the two valve clacks to move to the positions of the two orifices of the through hole, so that the through hole is in a disconnected state to stop the medium flowing between the inlet and the outlet, and the outer surface of the valve ball forms a complete spherical state, then, the valve ball is driven by the valve shaft to rotate, so that the valve ball rotates to the position where the through hole, the inlet and the outlet are in the same straight line under the condition of no high-pressure medium scouring, then, the driving shaft drives the two valve clacks to move reversely to the through hole to be opened, the inlet and the outlet are communicated through the through hole, and the anti-scouring ball valve completes the opening operation under the condition that the sealing element between the valve ball and the valve body is.
When the anti-scouring ball valve needs to be closed, firstly, the driving shaft drives the two valve clacks to move to the positions of the two orifices of the through hole, the through hole is switched to a disconnection state to stop the medium flowing between the inlet and the outlet, the outer surface of the valve ball forms a complete ball body state, then, the valve ball is driven by the valve shaft to rotate, the valve ball rotates to the position that the through hole is not in the same straight line with the inlet and the outlet under the condition of no high-pressure medium scouring, the inlet and the outlet are blocked and cut off by the body part of the valve ball, and the anti-scouring ball valve completes the closing operation under the condition that the medium does not scour a sealing element between the valve ball and the valve body.
Referring to fig. 1, the valve ball 2 is a hollow ball structure in the present embodiment, and the driving shaft 5 includes an outer shaft 51 and an inner shaft 52. The outer surface of the valve clack 3 adopts a circular arc structure and is simultaneously connected with the outer shaft 51 and the inner shaft 52 through the traction assembly 6. When the inner shaft 52 rotates in the circumferential direction relative to the valve ball 2, the traction assembly 6 can be driven to drive the valve flap 3 to reciprocate along the axial direction of the through hole 21, that is, the valve flap 3 is controlled to perform the ejecting motion and the retracting motion. When the outer shaft 51 rotates in the circumferential direction relative to the valve ball 2, the pulling assembly 6 can be driven to drive the valve clack 3 to rotate around the axis in the valve ball 2.
At the moment, the inner shaft drives the traction assembly to drive the valve clack to perform axial reciprocating movement relative to the through hole and the outer shaft drives the traction assembly to drive the valve clack to perform circular rotation compound motion in the valve ball, so that the position relation between the valve clack and the through hole can be adjusted and changed, the switching control of the on-off of the through hole is achieved, and meanwhile, the outer surface of the valve ball can be completely spherical, so that the ball valve is firstly in an inlet and outlet off state by means of the valve clack cutting off the through hole, and then rotates relative to the valve body, a sealing element between the valve ball and the valve body is always kept in contact with the surface of the valve ball, the sealing element is completely prevented from being washed due to the fact that high-pressure media flow exists in the rotating process of the valve ball relative to the valve body, the rotating of the.
Though, in this embodiment, through being hollow structure with the valve ball design to rotate along the valve ball inner wall again after moving to the state of withdrawing along the through-hole axial with the help of the valve clack, thereby realize the complete opening operation to the through-hole, not only can alleviate the weight of whole valve ball like this, improve the nimble convenience of operation, but also can reduce the valve clack and pass the flow influence of through-hole to high-pressure medium, stabilize the flow of high-pressure medium. Similarly, in other embodiments, the valve ball can be designed into a solid structure according to the requirements of design and use conditions, and at the moment, the through hole can be designed into a conical structure with a small hole opening size and a large internal size, so that the on-off control effect on the through hole is achieved by controlling the reciprocating movement of the valve clack along the axial direction of the through hole.
In the embodiment, two traction assemblies are provided to control the ejection movement and the retraction movement of the two valve clacks respectively, but the two traction assemblies have the same structure and control of the two valve clacks is synchronous control.
As shown in fig. 1, the traction assembly 6 includes a first link 61, a second link 62, a torsion spring 63, a pulley 64, and a connection wire 65. The pulley 64 is coaxially and fixedly connected with one end of the inner shaft 52 extending into the valve ball 2, so as to realize synchronous rotation between the two. One end of the first connecting rod 61 is rotatably connected with the valve clack 3, the other end of the first connecting rod 61 is rotatably connected with one end of the second connecting rod 62 along the axial direction of the through hole 21, and the other end of the second connecting rod 62 is rotatably connected with one end of the outer shaft 51 extending into the valve ball 2 along the axial direction of the through hole 21. The torsion spring 63 is located at a connecting position of the second link 62 and the outer shaft 51 to drive the second link 62 to rotate relative to the outer shaft 51, so that the first link 61 and the second link 62 are bent. One end of the connecting wire 65 is fixed on the wire wheel 64 in a winding way, and the other end of the connecting wire is connected with the connecting position of the first connecting rod 61 and the second connecting rod 62, so that the second connecting rod 62 is driven to rotate reversely relative to the outer shaft 51 against the acting force of the torsion spring 63, and the first connecting rod 61 and the second connecting rod 62 are rotated to be in the same linear position.
At the moment, when the rotating acting force of the torsion spring on the second connecting rod is greater than the pulling force of the connecting wire on the first connecting rod and the second connecting rod, the torsion spring can drive the second connecting rod to rotate relative to the outer shaft, and the connecting wire drives the wire wheel to drive the inner shaft to rotate so as to release the connecting wire, so that the valve clack is driven by the first connecting rod to move towards the inside of the valve ball, and the retracting movement of the valve clack is formed; on the contrary, when the inner shaft drives the wire wheel to rotate reversely, and the wire wheel winds the connecting wire to take up the rope, the second connecting rod can be driven to overcome the acting force of the torsion spring to rotate reversely relative to the outer shaft, so that the first connecting rod and the second connecting rod rotate to the same straight line state, the valve clack is driven to the surface position of the valve ball, and the ejection motion of the valve clack is formed. Therefore, under the condition of controlling the rotation of the inner shaft, the control effect of the valve clack moving to and fro along the axial direction of the through hole can be achieved by the torsion spring.
In the embodiment, two first connecting rods, two second connecting rods and two torsion springs are arranged in each traction assembly according to the size of the valve clack, so that two connecting points are formed for the valve clack to ensure stable driving of the valve clack. Also, in other embodiments, the number and installation positions of the one link, the second link, and the torsion spring in the pulling assembly may be completely adjusted according to the size of the valve flap, thereby ensuring stable driving of the valve flap.
As shown in fig. 1 and 3, the anti-erosion ball valve of the present embodiment further includes a handle 71, an air bag 72, a ratchet 511 at an end of the outer shaft 51 located outside the ball 2, and a connection plate 81, a connection rod 82, and a connection spring 83 at an end of the inner shaft 52 located outside the ball 2. Wherein, ratchet 511 is opened on the end face of the outer shaft 51, the connecting disc 81 is coaxially fixed on the end of the inner shaft 52, the connecting rod 82 is connected with the connecting disc 81 in a sliding way along the axial direction, one end of the connecting spring 73 is connected with the connecting disc 81 in a contact way, the other end of the connecting spring is connected with the connecting rod 82 in a contact way, so as to drive the connecting rod 82 to keep the extending state, thereby forming a connection relation with the ratchet 511, and when the ratchet 511 and the connecting rod 82 keep the connection state, the inner shaft 52 is limited to rotate relative to the outer shaft 51 along the clockwise direction shown.
The handle 71 is sleeved outside the outer shaft 51 and is fixedly connected with the outer shaft 51 by means of a connecting block. The air bag 72 is connected to the handle 71, and has one end located at a holding position of the handle 71 and the other end extending to a lower end surface of the connecting plate 81. At this time, by squeezing one end of the air bag positioned at the holding position in the handle, the other end of the air bag drives the connecting disc to axially move relative to the handle by means of pressure transmission, namely, axially move relative to the outer shaft, so that the connecting rod is driven to move to be separated from the connection with the ratchet, the rotation limitation on the inner shaft is removed, and the inner shaft can freely rotate back and forth relative to the outer shaft.
At the moment, after the connecting rod is disconnected with the connecting disc, the inner shaft can rotate freely, so that the torsion spring can drive the second connecting rod to rotate relative to the outer shaft, and the valve clack is controlled to retract. On the contrary, the inner shaft rotates in the opposite direction, the connecting wire pulls the second connecting rod to overcome the acting force of the torsion spring, so that the first connecting rod and the second connecting rod rotate to the same linear direction position, the valve clack is controlled to perform ejection motion, and the valve clack moves to the surface position of the valve ball.
In the present embodiment, the inner shaft 52 is designed as a two-part structure, one part of the inner shaft is used for extending into the valve ball 2 to mount and fix the pulley 64, the other part of the inner shaft is used for mounting and fixing the connecting disc 81, and the two parts of the inner shaft 52 are connected by the sliding block and the return spring 521 in an axial sliding manner and in a circumferential synchronous rotating manner. Therefore, when the air bag forms axial driving acting force on the connecting disc and overcomes the acting force of the return spring, axial sliding can be formed between the two parts of the inner shaft, so that the connecting disc is driven to move to release the connection between the connecting rod and the ratchet, and conversely, when the air bag loses the acting force on the connecting disc along the axial direction, the two parts of the inner shaft can perform reverse axial sliding under the action of the return spring, so that the connecting disc is driven to reversely move to enable the connecting rod to be connected with the ratchet again.
Similarly, in other embodiments, depending on the design and processing, the connection between the land and the inner shaft may be designed to be axially slidably connected, that is, the connection between the land and the inner shaft may be made by a slider and a return spring, while the inner shaft is held in an integrated structure, so that the driving of the land by the airbag and the control of the connection relationship between the land and the outer shaft may be realized.
Further, in the present embodiment, by providing the connecting rod on the connecting disc, a unidirectional rotational connection is formed with the ratchet of the outer shaft end face by means of the connecting rod. Also, in other embodiments, the end surface of the coupling plate may be designed in a ratchet structure so that a one-way rotational connection between the coupling plate and the outer shaft is formed using a mesh connection between two ratchets.
Referring to fig. 1 and 2, an arc-shaped groove 13, a positioning block 14 and an auxiliary positioning element 15 are further provided on the valve body 1. The arc-shaped slot 13 has a central angle of 90 degrees and opens in the valve body 1 in a surface which forms a relative rotation with the valve spindle 4. One end of the positioning block 14 is fixedly connected with the valve shaft 4, and the other end of the positioning block extends into the arc-shaped groove 13 and can reciprocate along the arc-shaped groove 13.
The auxiliary positioning member 15 is located on a relative rotational surface between the handle 71 and the valve shaft 4 for selectively coupling the handle 71 and the valve shaft 4 in a circumferential direction of rotation. At this moment, through the extrusion gasbag and after the drive connection pad removes and makes the connecting rod break away from being connected with the ratchet, rethread rotation handle just can drive valve shaft and outer axle and carry out reciprocating rotation to under the effect of arc wall and locating piece, can drive the drive shaft by the handle and carry out 90 degrees reciprocating rotation, thereby drive the valve ball and carry out 90 degrees reciprocating rotation, realize the switching control of position relation between through-hole and import and the export. Meanwhile, when the positioning block is located at the terminal position of the arc-shaped groove and the handle continues to rotate, the positioning ball in the auxiliary positioning piece is pressed into the positioning hole, so that the rotary connection between the handle and the valve shaft is removed, the handle drives the outer shaft to rotate subsequently, and then the valve clack is driven to rotate relative to the valve ball, and the control effect of controlling the valve clack to make and break of the through hole is achieved.
In this embodiment, supplementary setting element comprises locating hole, constant head tank, location spring and location ball, and wherein, the locating hole is seted up on the valve shaft, and the constant head tank is seted up on the handle, and location spring and location ball are located the locating hole to when the constant head tank rotates along with the handle to align with the locating hole the location spring will drive the direction removal of location ball to the constant head tank, thereby form the rotation between handle and the valve shaft and be connected. Similarly, in other embodiments, the handle and the valve shaft may be selectively coupled by using other types of auxiliary positioning members, and even by using an independently controlled electric rod.
In addition, in this embodiment, the scour prevention ball valve is the two-way valve and import and exit are in same straight line position to with the through-hole design for straight hole structure and for 90 degrees with the central angle design of arc wall, after carrying out the rotation of maximum angle along the arc wall with the assurance drive shaft, can turn to completely with the through-hole with import and the position that the export does not communicate, guarantee the effect of cutting off to import and export. Similarly, in other embodiments, the central angle of the arc-shaped groove can be completely adjusted according to specific conditions, for example, for a three-way valve structure, the through hole on the valve ball can be adjusted in the opening position and form according to the positions of three ports on the valve body, and the size of the arc-shaped groove and the number of the valve clacks can be adjusted and changed, so that on-off switching control of the through hole on the valve ball is met, and effective on-off control of a corresponding anti-scouring ball valve is realized.
In addition, in the present embodiment, the valve shaft and the driving shaft are driven to rotate by the handle, and the air bag is provided in the handle, so that the driving control of the connecting disc is achieved by utilizing the squeezing action of the air bag when the handle is held, and the control of the connection relationship between the inner shaft and the outer shaft is achieved. However, in other embodiments, according to the design size and the use condition of the anti-erosion ball valve, other manners may be adopted to control the rotation of the driving shaft and the valve shaft, and the connection relationship between the outer shaft and the inner shaft, for example, for a large-size ball valve and a condition that manual operation is inconvenient, the driving shaft, the outer shaft and the inner shaft may be independently driven and controlled by a plurality of independent electrically controlled driving elements, for example, stepper motors, so as to achieve the effect of remotely controlling the driving shaft, the outer shaft and the inner shaft.
As shown in fig. 1, the anti-erosion ball valve of this embodiment further includes a driving gear 91 and a driving rod 92, and the connecting plate 81 is provided with external teeth. The drive lever 92 is connected to the handle 71 and is rotatable in a reciprocating manner with respect to the handle 71. The driving gear 91 is coaxially and fixedly connected with the driving rod 92 and is meshed with external teeth on the connecting plate 81. When the connecting disc 81 is kept in rotary connection with the ratchet 511 through the connecting rod 82, the driving gear 91 is kept in tooth meshing connection with the connecting disc 81; conversely, when the coupling plate 81 is moved relative to the outer shaft 51 to be out of coupling with the ratchet teeth 511, the driving gear 91 is also out of coupling with the coupling plate 81.
At the moment, the connecting disc can be driven to rotate through the driving gear by controlling the rotation of the driving rod, so that the inner shaft is driven to rotate, the active withdrawing operation of the connecting wire by the wire wheel is realized, namely, the second connecting rod is pulled to overcome the acting force of the torsion spring to rotate, the valve clack is driven to the surface position of the valve ball, and the valve clack is pushed out.
Referring to fig. 1 to 6, when the anti-erosion ball valve of the present embodiment performs on-off control of the pipeline, the inlet 11 is communicated with the external upstream pipeline, and the outlet 12 is communicated with the external downstream pipeline, wherein the specific control operation process is as follows:
when the anti-erosion ball valve needs to be switched from a closed state to an open state, the handle 71 is rotated counterclockwise in the direction shown in fig. 2, the valve shaft 4 is driven to rotate through the positioning block 14 and the auxiliary positioning member 15, the positioning block 14 is rotated to the position shown in fig. 2 along the arc-shaped groove 13, and the valve ball 2 is rotated to the position shown in fig. 1 under the condition that the complete outer spherical surface is maintained. Then, the air bag 72 is pressed to move the connecting plate 81 against the urging force of the return spring 521, thereby releasing the connection between the connecting rod 82 and the ratchet 511 and the tooth-meshing connection between the connecting plate 81 and the drive gear 91. At this time, the inner shaft 52 enters a free rotation state, so that the torsion spring 63 can drive the second connecting rod 62 to rotate against the pulling force of the connecting line 65 under the restoring acting force, the first connecting rod 61 and the second connecting rod 62 rotate to the bending state shown in fig. 4, and the valve clack 3 retracts to move to the position shown in fig. 5 along the axial direction of the through hole 21. Then, under the condition of keeping the pressing action on the air bag 72, the handle 71 continues to rotate along the counterclockwise direction shown in fig. 2, at this time, due to the limitation that the arc-shaped groove 13 and the positioning block 14 further rotate the driving shaft 4, the positioning ball in the auxiliary positioning piece 15 is directly pressed into the positioning hole by the handle 71, so that the handle 71 can independently drive the outer shaft 51 to continue to rotate counterclockwise, the valve clack 3 is completely rotated to the inner position of the ball valve 2 shown in fig. 6, the through hole 21 is completely opened, the inlet 11 is communicated with the outlet 12, and the opening operation of the anti-scouring ball valve is completed.
When the anti-scouring ball valve needs to be switched from the open state to the closed state, firstly, the air bag 72 is squeezed, the connecting rod 82 is driven by the connecting plate 81 to overcome the acting force of the return spring 521, the connection between the connecting rod 82 and the ratchet 511 and the tooth meshing connection relationship between the connecting plate 81 and the driving gear 91 are released, and under the condition that the air bag 72 is kept in the squeezed state, the handle 71 is rotated clockwise in fig. 2, the outer shaft 51 is driven by the handle 71 alone to rotate relative to the valve ball 2, and the valve clack 3 is rotated to the through hole 21, namely, the position shown in fig. 4 and 5. At this time, the positioning groove in the auxiliary positioning assembly 15 is realigned with the positioning hole along with the rotation of the handle 71, so that the positioning ball moves into the positioning groove under the action of the positioning spring, and the handle 71 and the valve shaft 4 are connected in a rotation manner along the circumferential direction. Then, the pressing action on the air bag 72 is released, the connecting plate 81 is moved by the return spring 521 into tooth-meshing engagement with the drive gear 91, and the connecting rod 82 is brought into engagement with the ratchet teeth 511. Then, the driving rod 92 is rotated, the connecting disc 81 is driven by the driving gear 91 to rotate along the counterclockwise direction shown in fig. 3, so that the connecting disc 81 can drive the inner shaft 52 to rotate relative to the outer shaft 51, the inner shaft 52 drives the pulley 64 to retract and rotate the connecting wire 65, the connecting wire 65 drives the first connecting rod 61 and the second connecting rod 62 to rotate under the action of the torsion spring 63, the valve clacks 3 are driven to the outer surface position of the valve ball 2, namely the position shown in fig. 1, the ejection movement of the valve clacks 3 is completed, and the valve ball 2 forms a complete ball outer surface. Finally, under the condition that the ratchet 511 keeps the connecting rod 82 from rotating clockwise, that is, under the condition that the valve clack 3 is kept at the ejection position, the handle 71 is rotated 90 degrees clockwise as shown in fig. 2, so that the handle 71 drives the valve shaft 4 to rotate through the auxiliary positioning piece 15, and further drives the valve ball 2 to rotate 90 degrees, the through hole 21 is rotated to a position which is not aligned with the inlet 11 and the outlet 12, and the inlet 11 and the outlet 12 are cut off by using the body part of the valve ball 2, thereby completing the closing operation of the anti-scouring ball valve.

Claims (10)

1. An anti-scouring ball valve is characterized by comprising a valve body, a valve ball, a valve clack, a valve shaft and a driving shaft; the valve body is provided with an inlet and an outlet which are communicated, the valve ball is positioned between the inlet and the outlet, and the valve ball is provided with a through hole; the valve clack is positioned on the valve ball and is relatively movably connected with the valve ball to plug and open the through hole, wherein when the through hole is plugged, the outer surface of the valve ball can form a complete spherical surface; the valve shaft is connected with the valve ball so as to drive the valve ball to rotate in a reciprocating manner relative to the valve body and control the communication relationship between the inlet and the outlet; the driving shaft is connected with the valve clack to drive the valve clack to move relatively relative to the valve ball.
2. An anti-erosion ball valve in accordance with claim 1, wherein said valve ball is a hollow ball structure, said drive shaft comprises an outer shaft and an inner shaft, and said clapper is simultaneously connected to said outer shaft and said inner shaft by a pulling assembly; when the inner shaft rotates relative to the valve ball in the circumferential direction, the traction assembly can be driven to drive the valve clack to reciprocate along the axial direction of the through hole; when the outer shaft rotates relative to the valve ball in the circumferential direction, the outer shaft can drive the traction assembly to drive the valve clack to rotate around the shaft in the valve ball.
3. An anti-scour ball valve according to claim 2, wherein the traction assembly comprises a first link, a second link, a torsion spring, a pulley and a connecting wire; the wire wheel is coaxially and fixedly connected with the inner shaft, one end of the first connecting rod is rotatably connected with the valve clack, the other end of the first connecting rod is rotatably connected with one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected with the outer shaft; the torsion spring is positioned at the connecting position of the second connecting rod and the outer shaft so as to drive the second connecting rod to rotate relative to the outer shaft, so that the first connecting rod and the second connecting rod form a bending state; one end of the connecting wire is wound and fixed on the wire wheel, and the other end of the connecting wire is connected with the connecting position of the first connecting rod and the second connecting rod so as to drive the second connecting rod to rotate reversely relative to the outer shaft, so that the first connecting rod and the second connecting rod are in the same straight line state.
4. An anti-scour ball valve according to claim 2, wherein the inner and outer shafts are ratcheted to provide a one-way synchronous rotational connection therebetween.
5. An anti-scouring ball valve according to claim 4, wherein the end of the inner shaft is provided with a connecting disc, and the ratchet teeth are arranged on the outer shaft; the connecting disc is axially reciprocable relative to the outer shaft to form a selective connection with the ratchet.
6. An anti-scouring ball valve according to claim 5, wherein the end of the inner shaft is further provided with a connecting rod and a connecting spring; the connecting rod is movably connected with the connecting disc, one end of the connecting spring is in contact connection with the connecting disc, and the other end of the connecting spring is in contact connection with the connecting rod so as to drive the connecting rod to move and keep a position connected with the ratchet.
7. An anti-scouring ball valve according to claim 6, characterized in that the anti-scouring ball valve is further provided with an air bag, the inner shaft is of a split structure, and the two parts are connected by a return spring; the air bag is in contact with the connecting disc so as to drive the connecting disc to axially move relative to the outer shaft and drive the connecting rod to move to be disconnected from the ratchet; one part of the inner shaft is coaxially and fixedly connected with the connecting disc, the other part of the inner shaft is connected with the traction assembly, and the return spring is positioned between the two parts of the inner shaft so as to drive the connecting disc to be kept connected with the ratchet.
8. An anti-scouring ball valve according to claim 5, further provided with a driving gear, and the connecting disc is provided with external teeth; when the connecting disc is in rotary connection with the ratchet, the driving gear is in meshed connection with the connecting disc holding teeth; when the connecting disc is disconnected with the ratchet, the driving gear is disconnected with the connecting disc.
9. An anti-scour ball valve according to any one of claims 1 to 8, further comprising a handle; the handle is selectively coupled to the valve shaft and the drive shaft to respectively drive the valve shaft and the drive shaft for rotation.
10. An anti-scouring ball valve according to claim 9, further provided with an arc-shaped groove, a positioning block and an auxiliary positioning member, and the handle is coaxially and fixedly connected with the driving shaft; the arc-shaped groove is formed in the valve body, one end of the positioning block is fixedly connected with the valve shaft, and the other end of the positioning block extends into the arc-shaped groove and can reciprocate along the arc-shaped groove; the auxiliary positioning piece is positioned between the handle and the valve shaft and forms coaxial rotation selective connection for the handle and the valve shaft; when the auxiliary positioning piece keeps coaxial rotary connection between the handle and the valve shaft, the handle rotates back and forth along the arc-shaped groove through the valve shaft to drive the valve ball to rotate relative to the valve body; when the auxiliary positioning piece releases the coaxial rotary connection between the handle and the valve shaft, the handle drives the driving shaft to control the valve clack to move relative to the valve ball.
CN202110190910.0A 2021-02-20 2021-02-20 Anti-scouring ball valve Pending CN112963570A (en)

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Application Number Priority Date Filing Date Title
CN202110190910.0A CN112963570A (en) 2021-02-20 2021-02-20 Anti-scouring ball valve

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Application Number Priority Date Filing Date Title
CN202110190910.0A CN112963570A (en) 2021-02-20 2021-02-20 Anti-scouring ball valve

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1614943A1 (en) * 2004-07-09 2006-01-11 Geberit Technik Ag Ball valve
KR20100027535A (en) * 2008-09-02 2010-03-11 이병순 Twin disc moving type valve
CN202327193U (en) * 2011-11-23 2012-07-11 浙江超达阀门股份有限公司 Anti-scouring abrasion-resisting ball valve with flow control function
CN106870758A (en) * 2017-04-02 2017-06-20 盐城市德邦机械制造有限公司 A kind of low leakage double-wedge type bivalve ball valve
CN111795171A (en) * 2020-07-03 2020-10-20 东莞海特帕沃液压科技有限公司 Ball valve with long service life
CN112066027A (en) * 2020-09-09 2020-12-11 替科斯科技集团天津流体设备有限公司 Heat supply abrasion-resistant ball valve
CN112161081A (en) * 2020-10-20 2021-01-01 符鹏 Anti-scouring ball valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1614943A1 (en) * 2004-07-09 2006-01-11 Geberit Technik Ag Ball valve
KR20100027535A (en) * 2008-09-02 2010-03-11 이병순 Twin disc moving type valve
CN202327193U (en) * 2011-11-23 2012-07-11 浙江超达阀门股份有限公司 Anti-scouring abrasion-resisting ball valve with flow control function
CN106870758A (en) * 2017-04-02 2017-06-20 盐城市德邦机械制造有限公司 A kind of low leakage double-wedge type bivalve ball valve
CN111795171A (en) * 2020-07-03 2020-10-20 东莞海特帕沃液压科技有限公司 Ball valve with long service life
CN112066027A (en) * 2020-09-09 2020-12-11 替科斯科技集团天津流体设备有限公司 Heat supply abrasion-resistant ball valve
CN112161081A (en) * 2020-10-20 2021-01-01 符鹏 Anti-scouring ball valve

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