WO2019149290A1 - 一种阀座驱动强制密封球阀 - Google Patents

一种阀座驱动强制密封球阀 Download PDF

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Publication number
WO2019149290A1
WO2019149290A1 PCT/CN2019/079471 CN2019079471W WO2019149290A1 WO 2019149290 A1 WO2019149290 A1 WO 2019149290A1 CN 2019079471 W CN2019079471 W CN 2019079471W WO 2019149290 A1 WO2019149290 A1 WO 2019149290A1
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WO
WIPO (PCT)
Prior art keywords
valve
ball
valve seat
gear
hole
Prior art date
Application number
PCT/CN2019/079471
Other languages
English (en)
French (fr)
Inventor
陈继檬
刘晓琦
Original Assignee
淄博沃泰斯石化设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 淄博沃泰斯石化设备有限公司 filed Critical 淄博沃泰斯石化设备有限公司
Priority to US16/516,331 priority Critical patent/US10859169B2/en
Publication of WO2019149290A1 publication Critical patent/WO2019149290A1/zh

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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
    • 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
    • F16K5/0663—Packings
    • 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
    • F16K5/0626—Easy mounting or dismounting means
    • F16K5/0636—Easy mounting or dismounting means the spherical plug being insertable from the top of the housing
    • 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
    • F16K31/53—Mechanical actuating means with toothed gearing
    • F16K31/535—Mechanical actuating means with toothed gearing for rotating 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
    • 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
    • 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
    • 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
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
    • F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug

Definitions

  • the present disclosure pertains to ball valves, and more particularly to a valve seat driven forced seal ball valve.
  • the traditional lifting rod type forced sealing ball valve adopts the lifting stem rail guiding design.
  • the valve can be made to have no contact with the valve seat and frictionless for most of the whole time of the switch, it still exists in the final cohesion phase of the valve ball and the valve seat sealing surface. Relative sliding friction, there is no real frictionless rotation; the forced engagement between the valve ball and the valve seat can be completed by the wedge surface of the valve stem and the cooperation of the lower shaft of the valve ball.
  • the action process is not stable enough, and is easily affected by the relative position accuracy of the valve seat and the rotating shaft; the valve stem portion and its assembly structure are complicated, and the straight stroke and the angular stroke motion need to be superimposed during the switching process; the machining precision is required to be high; the valve stem leakage is prone to occur. At the same time, the switching operation time is too long.
  • the purpose of the present disclosure is to propose a technical solution for a valve seat to drive a forced seal ball valve. Improve structural stability and reliability, and improve the performance of the forced seal ball valve.
  • a valve seat driving forced sealing ball valve comprising a valve body, a first valve seat, a valve ball and a valve stem, the valve stem driving the valve ball between switch positions Reciprocatingly rotating, the valve stem also drives the first valve seat to reciprocate in the direction of the valve ball, and when the valve ball is closed, the ball is engaged with the valve ball to achieve a forced seal.
  • first valve seat is driven to reciprocate in a direction of a valve ball by a first valve seat drive ring
  • the valve stem drives the first valve seat drive ring to rotate
  • the first valve seat drive ring is disposed therein Threaded
  • the first valve seat is provided with an external thread
  • the first valve seat drive ring drives the first valve seat to reciprocate in a direction of the valve ball by a screw connection.
  • the internal thread of the first valve seat drive ring and the external thread of the first valve seat are provided with a roll a post and a cage, the roller being disposed in the retainer, the roller simultaneously engaging an internal thread of the first valve seat drive ring and an external thread of the first valve seat.
  • the driving manner between the valve stem and the valve ball and the first valve seat is that the valve stem drives the valve ball to turn off by the locking body; when the valve ball rotates from the open position to the closed position, The locking body locks the connection relationship between the valve stem and the valve ball, so that the valve stem drives the valve ball to rotate, and when the valve ball rotates to the closed position, the locking body releases the connection relationship between the valve stem and the valve ball And locking the valve ball in a closed position, the valve stem continues to drive the first valve seat to move, the first valve seat and the valve ball are engaged; and the valve seat drives the forced sealing ball valve to open The valve stem drives the first valve seat to move away from the valve ball cohesion direction, and after the first valve seat is disengaged from the valve ball, the locking body releases the valve ball in the closed position. Locking and locking the connection relationship between the valve stem and the valve ball, the valve stem drives the valve ball to rotate to the open position.
  • a driving structure between the valve stem and the valve ball and the first valve seat is that the valve stem is provided with a first gear and a second gear, and the first valve seat drive ring is provided with a first toothed disc The first gear meshes with the first toothed disc; the valve ball is provided with a valve ball upper sleeve, and the inner hole of the valve ball upper sleeve is rotatably engaged with an upper support shaft, the valve ball a third gear is mounted on the outer cylinder surface of the sleeve, and the second gear meshes with the third gear; the sleeve wall of the sleeve of the valve ball is provided with a through hole through the first through hole.
  • a first recessed hole corresponding to the first through hole is disposed inside the shaft hole of the third gear, and an outer cylindrical surface of the upper support shaft is provided with a second recessed hole corresponding to the first through hole
  • the locking body is installed in the first through hole with a clearance fit, the length of the locking body is greater than the wall thickness of the sleeve on the valve ball; the third gear is provided with the valve ball direction The dial that rotates in the opening direction.
  • the locking body is a cylindrical pin or a ball pin with a ball end at both ends
  • the first through hole of the sleeve wall of the sleeve of the valve ball is a corresponding to the cylindrical outer diameter of the locking body.
  • a first recessed hole of the third gear is a spherical recess corresponding to a ball head of the locking body
  • a second recessed hole of the upper support shaft is a spherical recess corresponding to a ball head of the locking body hole.
  • the locking body is a cylindrical pin having a ball end at both ends, the axis of the locking body is parallel to the rotation axis of the valve stem, and the first through hole of the sleeve wall of the sleeve on the valve ball is a cylindrical outer diameter of the locking body and a long hole corresponding to the ball ends of the two ends, wherein the first concave hole of the third gear is a long concave hole corresponding to the cylindrical outer diameter of the locking body and the ball ends of the two ends,
  • the second recessed hole of the upper support shaft is a long recessed hole corresponding to the cylindrical outer diameter of the locking body and the ball ends of the two ends, and the cylindrical diameter of the locking body is larger than the wall thickness of the sleeve on the valve ball .
  • the locking body is a cylindrical pin having a tapered head at both ends
  • the first recessed hole of the third gear is a tapered recess corresponding to the tapered head of the locking body
  • the upper support shaft is a tapered recessed hole corresponding to the tapered head of the lock body.
  • the valve seat driving forced sealing ball valve is provided with a second valve seat and a second valve seat driving ring, and the second valve seat driving ring a second toothed disc is provided, the second toothed disc is meshed with a fourth gear, the fourth gear rotates coaxially with a fifth gear, and the fifth gear meshes with the third gear
  • the first valve seat and the second valve seat both mate with the valve ball when the valve seat drives the forced seal ball valve to close.
  • valve stem is coaxial with the valve ball rotating shaft
  • valve stem is provided with a sixth gear
  • the sixth The gear is rotatably engaged with a bearing housing
  • the sixth gear meshes with a seventh gear
  • the first valve seat drive ring is provided with a first toothed disk
  • the first toothed disk is meshed with an eighth gear
  • the seventh gear and the eighth gear rotate coaxially synchronously
  • the valve ball is provided with a valve ball upper shaft
  • the valve ball upper shaft is rotatably engaged with the sixth gear
  • the end surface of the valve ball upper shaft is convex Block
  • the inner hole of the sixth gear is provided with a dial that slides the bump to rotate the ball valve in the opening direction
  • the valve ball is provided with a valve ball transmission plate
  • the valve ball transmission The plate is provided with a through second through hole
  • the upper end surface of the sixth gear is provided with a third recessed hole corresponding to the second through hole
  • the locking body has a first end surface and a second end surface;
  • the first recessed hole of the third gear includes a first mating surface for engaging with the first end surface;
  • the second supporting shaft is second
  • the recess includes a second mating face for mating with the second end face.
  • first end surface is a hemispherical convex surface; and the first mating surface is a hemispherical concave surface.
  • the second end surface is a hemispherical convex surface; and the second mating surface is a hemispherical concave surface.
  • first end surface is a conical convex surface; the first mating surface is a conical concave surface.
  • the second end surface is a conical convex surface; and the second mating surface is a conical concave surface.
  • valve seat driving forced sealing ball valve further includes a limiting body disposed between the first valve seat and the valve body.
  • the limiting body extends along a reciprocating direction of the first valve seat; the limiting body may be inserted in the valve body or the first valve seat.
  • the utility model has the beneficial effects that the valve seat is used to realize the forced sealing of the ball valve, thereby reducing the structural complexity; the locking body is used to control the connection relationship between the valve stem and the valve ball and the first valve seat, thereby realizing a valve stem
  • the operation of the ball valve is opened, closed and forcedly sealed, and the operation is convenient, and the operation stability and reliability are good.
  • Figure 1 is an overall structural view of the present disclosure, the locking body is a cylindrical pin with a ball end at both ends;
  • Figure 2 is an exploded view of the structure of the present disclosure
  • Figure 3 is a structural view of a rotating portion of the valve ball of the present disclosure
  • Figure 4 is a schematic view showing the valve ball of the present disclosure
  • Figure 5 is a schematic view showing the rotation of the valve ball of the present disclosure from an open position to a closed position
  • Figure 6 is a schematic view showing the movement of the valve ball of the present disclosure to the closed position, the valve stem continues to drive the valve seat;
  • Figure 7 is a schematic view showing the state in which the valve seat and the valve ball are engaged
  • Figure 8 is a schematic view of the valve seat of the present disclosure being disengaged, and the valve stem starts to rotate in the opening direction by driving the valve ball through the dial block;
  • Figure 9 is a schematic view showing the process of the valve stem driving valve ball of the present invention starting to rotate in the opening direction;
  • Figure 10 is a structural view showing a toothed roller between the valve seat and the valve seat drive ring of the present disclosure
  • Figure 11 is a structural view of the rotating portion of the valve ball of the present disclosure, the locking body is a cylindrical pin having a ball end at both ends, and the axis of the locking body is parallel to the rotation axis of the valve stem;
  • Figure 12 is an exploded view of the structure of Figure 11;
  • Figure 13 is a structural view of the rotating portion of the valve ball of the present disclosure, the locking body is a cylindrical pin having a tapered end;
  • Figure 14 is an exploded view of the structure of Figure 13;
  • Figure 15 is a structural view of the rotating portion of the valve ball of the present disclosure, the locking body is a spherical locking body;
  • Figure 16 is an exploded view of the structure of Figure 15;
  • Figure 17 is a structural view of a valve seat having a forced seal on both the inlet side and the medium outlet side of the ball valve medium of the present disclosure
  • Figure 18 is a structural view of the valve stem axis of the present disclosure coaxial with the axis of rotation of the valve ball;
  • Figure 19 is an exploded perspective view of the transmission portion of Figure 18.
  • a valve seat driven forced seal ball valve includes a valve body 10, a first valve seat 20, a valve ball 30 and a valve stem 40, and the valve stem drives the valve ball to reciprocate between switch positions. Rotating while the valve stem drives the first valve seat to reciprocate in the direction of the valve ball, and when the valve ball is closed, the ball is engaged with the valve ball to achieve a forced seal.
  • the first valve seat is driven to reciprocate by a first valve seat drive ring 50, and the valve stem drives the first valve seat drive ring to rotate.
  • the first valve seat drive ring is provided with an internal thread 51.
  • the first valve seat is provided with an external thread 21, and the first valve seat drive ring drives the first valve seat to reciprocate in the direction of the valve ball by a screw connection.
  • a roller 53 and a retainer 54 are disposed between the internal thread of the first valve seat drive ring and the external thread of the first valve seat, and the roller is disposed in the cage The roller simultaneously engages an internal thread of the first valve seat drive ring and an external thread of the first valve seat.
  • the valve stem drives the valve ball to turn closed by the locking body 60; when the valve ball rotates from the open position to the closed position (as shown in FIGS. 4 and 5), the locking body locks the valve stem and the valve
  • the connection relationship of the ball causes the valve stem to drive the valve ball to rotate.
  • the valve ball is rotated to the closed position (as shown in FIG. 6 )
  • the locking body releases the connection relationship between the valve stem and the valve ball, and
  • the valve ball is locked in a closed position, the valve stem continues to drive the first valve seat to move, the first valve seat is engaged with the valve ball; and the valve is driven during the opening of the valve seat driving the forced sealing ball valve
  • the rod drives the first valve seat to move away from the valve ball cohesion direction (as shown in FIG. 7 and FIG.
  • the locking body releases the valve ball at The closed position locks and locks the connection relationship between the valve stem and the valve ball (as shown in FIG. 9), and the valve stem drives the valve ball to rotate to the open position.
  • the valve stem is provided with a first gear 41 and a second gear 42.
  • the first valve seat drive ring is provided with a first toothed disc 52, and the first gear meshes with the first toothed disc;
  • a valve ball upper sleeve 31 is provided, the inner hole of the valve sleeve is rotatably engaged with an upper support shaft 11, and the outer cylinder surface of the valve sleeve is rotatably mounted with the third gear 32.
  • the second gear meshes with the third gear;
  • the sleeve wall of the upper sleeve of the valve ball is provided with a through first through hole 33, and the inner side of the shaft hole of the third gear is provided with a position corresponding to the a first recessed hole 34 of the first through hole, the outer cylindrical surface of the upper support shaft is provided with a second recessed hole 12 corresponding to the first through hole;
  • the locking body is mounted with the clearance fit In a through hole, the length L of the locking body is larger than the wall thickness K of the sleeve on the valve ball; and
  • the third gear is provided with a dial 35 that toggles the ball valve to rotate in the opening direction.
  • the locking body 60 is a cylindrical pin with a ball end at both ends (as shown in FIG. 1 to FIG. 10 ), and the first through hole 33 of the sleeve wall of the upper sleeve of the valve ball is a column with the locking body a through hole corresponding to the outer diameter, a first recess 34 of the third gear is a spherical recess corresponding to the ball head of the locking body, and the second recess 12 of the upper support shaft is locked with the A spherical recess corresponding to the ball head of the body.
  • the locking body 60 is a cylindrical pin having a ball end at both ends, the axis of the locking body is parallel to the rotation axis of the valve stem, and the first wall of the sleeve of the valve ball is first.
  • the through hole 33a is an elongated hole corresponding to the cylindrical outer diameter of the locking body and the ball ends of the both ends
  • the first recessed hole 34a of the third gear is a cylindrical outer diameter and a double end ball of the locking body a second concave hole 12a corresponding to the head
  • the second concave hole 12a of the upper support shaft is a long concave hole corresponding to the cylindrical outer diameter of the locking body and the ball ends of the two ends
  • the cylindrical diameter d1 of the locking body is larger than The wall thickness of the sleeve on the valve ball.
  • the locking body is a cylindrical pin 6b having tapered ends at both ends, and the first recessed hole 34b of the third gear is a tapered recess corresponding to the tapered head of the locking body.
  • the second recessed hole 12b of the upper support shaft is a tapered recessed hole corresponding to the tapered head of the lock body.
  • valve seat driving forced sealing ball valve is provided with a second valve seat 2b and a second valve seat driving ring 5b
  • the second valve seat driving ring is provided with a second toothed disc 55, the second toothed disc Engaging with a fourth gear 56 that rotates coaxially with a fifth gear 57 that meshes with the third gear 32, the first valve seat and the second valve The seat is engaged with the valve ball when the valve seat drive forced seal ball valve is closed.
  • the valve stem 40 is coaxial with the shaft of the valve ball 30, and the valve stem is provided with a sixth gear 70.
  • the sixth gear is rotatably coupled with a bearing housing 16,
  • the sixth gear is meshed with a seventh gear 71
  • the first seat drive ring 50 is provided with a first toothed disc 52
  • the first toothed disc is meshed with an eighth gear 72
  • the seventh gear and the The eight-gear coaxially rotates synchronously
  • the valve ball is provided with a valve ball upper shaft 38
  • the valve ball upper shaft is rotatably engaged with the sixth gear
  • the end surface of the valve ball upper shaft is provided with a bump 39
  • the sixth The inner hole of the gear is provided with a dial 73 for sliding the ball to rotate the ball valve in the opening direction
  • the valve ball is provided with a valve ball transmission plate 3a
  • the valve ball transmission plate is provided with a a second through hole 3b
  • the upper end surface of the sixth gear is provided with a third recess 74
  • the length of the locking body is approximately equal to the depth of the third recessed hole plus the depth of the second through hole; the diameter of the spherical locking body is approximately equal to the depth of the fourth recessed hole and the depth of the second through hole.
  • the second through hole is aligned with the fourth recessed hole when the ball is in the fully closed position.
  • the second through hole is aligned with the third recessed hole.
  • the second through hole is simultaneously aligned with the third recessed hole and the fourth recessed hole only when the locking body is switched.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a valve seat drives a forced seal ball valve, including a valve body 10, a first valve seat 20, a valve ball 30, and a valve stem 40.
  • the first valve seat is driven by the first valve seat drive ring 50 to the valve.
  • the ball direction reciprocates.
  • the first valve seat 20 is a valve seat located at a medium inflow end of the valve seat driving forced sealing ball valve.
  • the first valve seat is provided with a limiting body such as four limit rotating columns 23, and is connected with the valve body, and the first valve seat is provided.
  • the first valve seat drive ring is provided with an internal thread 51, and the first valve seat drive ring drives the first valve seat to reciprocate in the direction of the valve ball by a screw connection, and the first valve seat drive ring is provided with a first toothed disc 52, A toothed disc is a tapered tooth.
  • a first drive ring cover 58 is mounted to one end of the first sprocket of the first valve seat drive ring.
  • the valve stem is perpendicular to the axis of the first valve seat, and the valve stem extends from the valve body upper cover 13 into the valve body.
  • the valve stem is provided with a first gear 41 and a second gear 42.
  • the first gear and the second gear rotate synchronously with the valve stem.
  • the first gear is a tapered tooth and the first gear meshes with the first toothed disc.
  • the valve ball is mounted in the valve body, and the lower end of the valve ball is provided with a scalloped projection 36.
  • the valve body is provided with a lower shaft chamber 14 corresponding to the lower shaft of the valve ball, and the lower shaft chamber is provided with a limiting groove 15 corresponding to the scallop of the end of the lower shaft of the valve ball. Limit the rotation of the ball to 90°.
  • the valve ball is provided with a valve ball upper sleeve 31, and the valve body upper cover is provided with an upper support shaft 11, and the inner hole of the valve ball upper sleeve is rotatably engaged with the upper support shaft.
  • a third gear 32 is mounted on the outer cylindrical surface of the upper sleeve of the valve ball, and the second gear meshes with the third gear; the sleeve wall of the upper sleeve of the valve ball is provided with a through first through hole 33.
  • the inner hole of the third gear is provided with a first recessed hole 34 corresponding to the first through hole, and the outer cylindrical surface of the upper support shaft is provided with the second recessed hole 12 corresponding to the first through hole; the first through hole A clearance fit locking body 60 is provided, the locking body reciprocating along the axis of the first through hole.
  • the locking body is a cylindrical pin whose both ends are ball ends, and the first concave hole 34 of the third gear is a spherical concave hole, and the depth of the spherical concave hole is equal to the radius of the spherical shape of the locking body.
  • the second recessed hole 12 of the upper support shaft is a spherical recessed hole, and the depth of the spherical recessed hole is also equal to the radius of the spherical shape of the lock body.
  • the wall thickness K of the sleeve on the valve ball is slightly larger than the sum of the length of the cylindrical section of the locking body and the radius of a ball head (as shown in Fig. 3).
  • the locking body can be located in the space formed by the first through hole 33 and the first recessed hole 34. At this time, the sleeve on the valve ball is locked in synchronization with the third gear (that is, the valve ball rotates synchronously with the third gear).
  • the spherical locking body can also be located in the space formed by the first through hole 33 and the second recessed hole 12.
  • the upper sleeve of the valve ball is locked relative to the upper support shaft, and the third gear can be opposite to the valve ball and the upper sleeve.
  • the upper end surface of the upper sleeve of the valve ball is provided with a bump 37
  • the third gear is provided with a dial block 35, and the dial block 35 of the third gear moves the protrusion 37 to rotate the ball valve in the opening direction.
  • the valve stem drives the valve ball to rotate from open to closed by the locking body 60; when the valve ball is in the open position, as shown in FIG. 4, the locking body is restrained in the space formed by the first through hole 33 and the first recessed hole 34, The force of the first recessed hole on the locking body has two component forces, and the component force drives the locking body to rotate, and the component force 2 pushes the locking body away from the first recessed hole.
  • the valve stem Simultaneously rotating to a position aligned with the second recessed hole 12 of the upper support shaft, the valve stem is continuously rotated, and at this time, the component force is balanced by the limitation of the valve body limit 15, which will push the lock body Moving away from the first recessed hole in the first through hole and entering the space formed by the first through hole 33 and the second recessed hole 12, the locking body releases the connection relationship between the valve stem and the valve ball, and the valve ball and the upper support shaft 11 lock to keep the ball in the closed position.
  • the third gear rotates on the sleeve of the valve ball, and the valve stem drives the first valve seat drive ring 50 to rotate through the first gear.
  • the first valve seat drive ring drives the first valve seat to the valve ball through the thread. Move in the direction to make the first valve seat and the ball fit, as shown in Figure 7.
  • the valve stem first drives the first valve seat through the first valve seat driving ring to move away from the cohesion direction (as shown in FIGS. 7 and 8).
  • the third gear Rotation on the sleeve of the valve ball does not drive the rotation of the valve ball because the lock body is restrained in the space formed by the first through hole 33 and the second recessed hole 12.
  • the first recessed hole 34 of the third gear rotates to a position aligned with the first through hole 33 of the sleeve on the valve ball, as shown in FIG.
  • the dial 35 of the third gear starts to move the bump 37 to rotate the sleeve on the valve ball in the opening direction, and the force of the second recess on the locking body when the sleeve on the ball rotates causes the locking body to come out and support
  • the second recessed hole 12 of the shaft enters the space formed by the first through hole 33 and the first recessed hole 34, and the locking body relocks the connection relationship between the third gear and the sleeve on the valve ball, as shown in FIG.
  • the valve stem continues to rotate until the ball is driven to the open position.
  • the driving stroke of the valve stem is greater than the rotation stroke of the valve ball, and the valve stem drives the valve ball and the first valve seat simultaneously in the opening and closing stroke interval of the valve ball, and the valve ball and the first valve seat leave a gap at this time.
  • the ball can be easily rotated. After the ball reaches the closed position, there is still a gap between the first valve seat and the valve ball. The continued rotation of the valve stem will only drive the reciprocating movement of the first valve seat, thereby realizing the forced sealing of the ball valve and the rotation of the valve ball.
  • the seat is disengaged without frictional rotation.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • a valve seat driven forced seal ball valve which is an improvement of a valve seat driven forced seal ball valve according to the first embodiment.
  • a toothed roller 53 and a retainer 54 are disposed between the internal thread of the first valve seat drive ring and the external thread of the first valve seat, and the toothed roller is disposed on the retainer.
  • the toothed roller simultaneously meshes with the internal thread of the first seat drive ring and the external thread of the first valve seat.
  • the roller is used to realize the transmission between the first valve seat drive ring and the first valve seat thread, and the sliding friction between the threads is improved to the rolling friction of the roller, which can significantly reduce the operating torque of the ball valve.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • a valve seat drives a forced sealing ball valve.
  • This embodiment is a structural replacement of a valve seat driven forced sealing ball valve according to the first embodiment.
  • the locking body 60 is a cylindrical pin having a ball end at both ends, the axis of the locking body is parallel to the rotation axis of the valve stem, and the first through hole 33a of the sleeve wall of the sleeve on the valve ball is both ends.
  • the semi-circular long hole corresponds to the cylindrical outer diameter of the locking body and the ball ends at both ends.
  • the first recessed hole 34a of the third gear is a long recessed hole, and further a semicircular groove having a spherical surface at both ends, the first recessed hole corresponding to the cylindrical outer diameter of the lock body and the ball ends at both ends.
  • the second recessed hole 12a of the upper support shaft is a long recessed hole corresponding to the cylindrical outer diameter of the lock body and the ball ends at both ends.
  • the cylindrical diameter d1 of the locking body is greater than the wall thickness of the sleeve on the valve ball.
  • the wall thickness of the sleeve on the valve ball is K is slightly larger than the cylindrical radius of the locking body.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • a valve seat drives a forced sealing ball valve.
  • This embodiment is a structural replacement of a valve seat driving forced sealing ball valve according to the first embodiment.
  • the locking body is a cylindrical pin 6b having a tapered head at both ends
  • the first recessed hole of the third gear is a tapered recessed hole 34b corresponding to the tapered head of the locking body
  • the upper support shaft The two recessed holes 12b are tapered recessed holes corresponding to the tapered head of the lock body.
  • the length of the locking body is greater than the wall thickness K of the sleeve on the valve ball, and the length of the locking body is approximately equal to the sum of the wall thickness of the sleeve on the valve ball and the depth of the first recessed hole, and the length of the locking body is also approximately equal to the upper shaft of the valve ball.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • the locking body 6c is a ball
  • the first recessed hole 34c of the third gear is a hemispherical concave hole corresponding to the spherical shape of the locking body, and the second concave of the upper supporting shaft.
  • the hole 12c is a hemispherical recess corresponding to the spherical shape of the lock body.
  • the radius of the spherical locking body is greater than the wall thickness of the sleeve on the valve ball.
  • the wall thickness of the sleeve on the valve ball is K. Slightly larger than the spherical radius of the locking body, the locking body can enter the space formed by the first through hole 33 and the first recessed hole 34c, and can enter the space formed by the first through hole 33 and the second recessed hole 12c.
  • a valve seat drives a forced sealing ball valve.
  • This embodiment is a structural extension of a valve seat driven forced sealing ball valve according to the first embodiment.
  • the valve seat includes a first valve seat 20 and a second valve seat 2b.
  • the first valve seat and the second valve seat are respectively disposed on the medium inlet side and the medium outlet side of the ball valve.
  • the valve seat drive ring includes a first valve seat drive ring 50 for driving the first valve seat and a second valve seat drive ring 5b for driving the second valve seat, the first valve seat drive ring is provided with a first toothed disc 52, and the second valve
  • the seat drive ring is provided with a second toothed disc 55, the second toothed disc is meshed with a fourth gear 56, the fourth gear rotates coaxially with a fifth gear 57, and the fifth gear meshes with the third gear 32.
  • the first valve seat and the second valve seat simultaneously converge with the valve ball when the valve seat drives the forced sealing ball valve to close.
  • valve stem drives the second valve seat through the second gear 42, the third gear 32, the fifth gear 57 and the fourth gear 56, so that the medium inlet of the ball valve and the valve seat of the medium outlet are simultaneously sealed with the valve ball. , enhanced the closing effect of the ball valve. It is also possible to keep the valve chamber portion between the two valve seats in a state of being isolated from the medium after being closed, and to perform maintenance work such as cleaning.
  • a valve seat driving forced sealing ball valve is a structural deformation of a valve seat driving forced sealing ball valve according to the first embodiment.
  • the valve seat driving forced sealing ball valve includes a valve body 10, a first valve seat 20, a valve ball 30 and a valve stem 40.
  • the first valve seat is driven by the first valve seat driving ring 50 to reciprocate toward the valve ball. mobile.
  • the first valve seat 20 and the first valve seat drive ring 50 are the same as in the first embodiment.
  • the valve stem 40 is coaxial with the rotation axis of the valve ball 30, and the end of the valve stem is provided with a sixth gear 70.
  • the end of the valve stem passes through a bearing housing 16 to drive the sixth gear to rotate through the square shaft.
  • the sixth gear is in rotational engagement with the inner bore of the bearing housing 16.
  • the sixth gear is meshed with a seventh gear 71, and the first seat drive ring 50 is provided with a first toothed disc 52, the first toothed disc 52 is meshed with an eighth gear 72, and the seventh and eighth gears are mounted on An intermediate transmission shaft 17 is coaxially rotated as an intermediate transmission gear.
  • the valve ball is provided with a valve ball upper rotating shaft 38, and the valve ball upper rotating shaft is rotatably matched with the sixth gear wheel, the end surface of the valve ball upper rotating shaft is provided with a convex block 39, and the inner hole of the sixth gear is provided with a sliding convex piece 39, so that the ball valve is oriented
  • the dial block 73 is rotated in the opening direction.
  • the valve ball is provided with a valve ball transmission plate 3a.
  • the valve ball transmission plate penetrates between the bearing seat 16 and the sixth gear 70.
  • the valve ball transmission plate is provided with a through second through hole 3b, and the axis of the second through hole is parallel to The axis of rotation of the valve ball.
  • a locking body is disposed in the second through hole.
  • the locking body of the embodiment uses the cylindrical pin 6a with the ball ends at both ends as described in the third embodiment.
  • the upper end surface of the sixth gear is provided with a third recess 74 corresponding to the second through hole, and the lower end surface of the bearing housing is provided with a fourth recess 18 corresponding to the second through hole.
  • the locking body 60 is mounted in the second through hole with a clearance fit.
  • the length of the locking body is greater than the thickness of the ball drive plate, and the length of the locking body is approximately equal to the thickness of the ball drive plate and the depth of the third recessed hole. And, the length of the locking body is also approximately equal to the sum of the thickness of the ball drive plate and the depth of the fourth recess.
  • the valve stem drives the valve ball to rotate by the locking body 6a.
  • the locking body locks the connection relationship between the valve ball transmission plate and the sixth gear through the second through hole and the third recessed hole, and the valve ball moves from the open position to the valve seat when the forced sealing ball valve is closed.
  • the valve stem drives the valve ball to rotate synchronously.
  • the limiting groove 15 of the valve body limits the rotation of the valve ball, and the third recessed hole 74 and the second through hole 3b are synchronously rotated to the first part of the bearing housing.
  • valve stem first drives the first valve seat through the first valve seat driving ring to move away from the cohesion direction.
  • the sixth gear rotates on the rotating shaft 38 of the valve ball, Will drive the ball to rotate.
  • the sixth gear is rotated on the upper shaft of the valve ball to the third recessed hole 74 of the sixth gear and the second through hole 3b and the fourth recessed hole 18 aligned position, at the same time, the dial 33 of the sixth gear starts to slide the bump 39 of the end surface of the upper shaft of the valve ball, rotates the valve ball in the opening direction, and the fourth portion of the valve ball rotates out of the bearing seat 16 when the valve ball rotates.
  • the recessed hole 18 enters the space formed by the second through hole 3b and the third recessed hole 74, and the locking body relocks the connection relationship between the sixth gear and the upper shaft of the valve ball.
  • the lower end surface of the bearing housing 16 restrains the locking body. It is held in the space formed by the second through hole 3b and the third recessed hole 74.
  • the valve stem continues to drive the ball to rotate until the ball is driven to the open position.
  • the sixth gear can also directly mesh with the first toothed disc, and the seventh and eighth gears and the intermediate transmission shaft 17 are not essential structures and can be removed to make the whole mechanism more compact.
  • valve body a top-mounted valve body.
  • the technical solution of the present disclosure is not limited by the form of the valve body, and the valve body may be side-mounted or fully welded.

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  • General Engineering & Computer Science (AREA)
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  • Multiple-Way Valves (AREA)

Abstract

一种阀座驱动强制密封球阀，包括阀体(10)、第一阀座(20)、阀球(30)和阀杆(40)，阀杆(40)驱动阀球(30)在开关位置之间往复转动，阀杆(40)还驱动第一阀座(20)向阀球(30)方向往复移动，在阀球(30)关闭时与阀球(30)抱合实现强制密封。第一阀座(20)由第一阀座驱动环(50)驱动向阀球(30)方向往复移动，第一阀座驱动环(50)设有内螺纹，第一阀座(20)设有外螺纹，第一阀座驱动环(50)通过螺纹连接驱动第一阀座(20)向阀球(30)方向往复移动。

Description

一种阀座驱动强制密封球阀
相关申请的交叉引用
本申请主张在2018年2月1日在中国提交的中国专利申请号No.201810100650.1的优先权，其全部内容通过引用包含于此。
技术领域
本公开属于球阀，尤其涉及一种阀座驱动强制密封球阀。
背景技术
在流体控制领域，如油气生产流程切换、管道关断、计量、调压、分子筛切换、压缩机进出口、炼油工艺中的氢气工况、合成氨装置的空分等操作频繁并对流体开关控制和关闭严密性要求苛刻的领域，要求阀门能够在直通的状态下尽可能小的产生压降，并且能够提供不受管线介质压力影响的强制扭矩密封。强制密封球阀被公认为理想的解决方案。
然而传统提升杆式强制密封球阀，采用提升阀杆轨道引导设计，尽管可以实现阀门在开关全程大部分时间与阀座无接触、无摩擦，但在阀球与阀座密封面最后抱合阶段仍存在相对滑动摩擦，没有真正做到无摩擦旋转；其阀球和阀座间的强制抱合通过阀杆的楔式面下压并配合阀球下转轴的共同作用才能完成。其动作过程不够平稳，容易受到阀座与转轴相对位置精度的影响；阀杆部分及其总成结构复杂，开关过程中需要叠加直行程和角行程运动；加工精度要求高；容易发生阀杆泄露；同时开关操作时间过长。
发明内容
本公开的目的是提出一种阀座驱动强制密封球阀的技术方案。提高结构的稳定性和可靠性，改进强制密封球阀的操作性能。
为了实现上述目的，本公开的技术方案是：一种阀座驱动强制密封球阀,包括阀体、第一阀座、阀球和阀杆，所述阀杆驱动所述阀球在开关位置之间往复转动，所述阀杆还驱动所述第一阀座向所述阀球方向往复移动，在所述 阀球关闭时与所述阀球抱合实现强制密封。
更进一步，所述第一阀座由第一阀座驱动环驱动向阀球方向往复移动，所述阀杆驱动所述第一阀座驱动环转动，所述第一阀座驱动环设有内螺纹，所述第一阀座设有外螺纹，所述第一阀座驱动环通过螺纹连接驱动所述第一阀座向阀球方向往复移动。
更进一步，为了降低第一阀座驱动环与第一阀座之间螺纹传动的摩擦力，所述第一阀座驱动环的内螺纹与所述第一阀座的外螺纹之间设有滚柱和保持架，所述滚柱设置在所述保持架中，所述滚柱同时与所述第一阀座驱动环的内螺纹和所述第一阀座的外螺纹啮合。
更进一步，所述阀杆与阀球和第一阀座之间的驱动方式为，所述阀杆通过锁定体驱动所述阀球转向关闭；所述阀球从开启位置向关闭位置转动时，所述锁定体锁定所述阀杆和阀球的连接关系，使所述阀杆驱动阀球转动，当阀球转动到关闭位置后，所述锁定体解除所述阀杆和阀球的连接关系，并将所述阀球锁定在关闭位置，所述阀杆继续驱动所述第一阀座移动，使所述第一阀座与阀球抱合；在所述阀座驱动强制密封球阀开启过程中，所述阀杆驱动所述第一阀座向脱离所述阀球抱合方向移动，所述第一阀座脱离与阀球的抱合后，所述锁定体解除阀球在所述关闭位置关位的锁定、并锁定所述阀杆和阀球的连接关系，所述阀杆驱动所述阀球转动到开启位置。
更进一步，一种阀杆与阀球和第一阀座之间的驱动结构为，所述阀杆设有第一齿轮和第二齿轮，所述第一阀座驱动环设有第一齿盘，所述第一齿轮与所述第一齿盘啮合；所述阀球设有阀球上轴套，所述阀球上轴套的内孔与一个上支承轴转动配合，所述阀球上轴套的外柱面以转动配合安装有第三齿轮，所述第二齿轮与所述第三齿轮啮合；所述阀球上轴套的轴套壁设有一个贯通的第一通孔，所述第三齿轮的轴孔内侧设有位置对应于所述第一通孔的第一凹孔，所述上支承轴的外柱面设有位置对应于所述第一通孔的第二凹孔；所述锁定体以间隙配合安装在所述第一通孔中，所述锁定体的长度大于所述阀球上轴套的壁厚；所述第三齿轮设有拨动所述阀球向所述开启方向转动的拨块。
更进一步，所述锁定体是两端为球头的圆柱销或球形销，所述阀球上轴 套的轴套壁的第一通孔是与所述锁定体的柱形外径对应的通孔，所述第三齿轮的第一凹孔是与所述锁定体的球头对应的球形凹孔，所述上支承轴的第二凹孔是与所述锁定体的球头对应的球形凹孔。
更进一步，所述锁定体是两端为球头的圆柱销，所述锁定体的轴线平行于阀杆的转动轴线，所述阀球上轴套的轴套壁的第一通孔是与所述锁定体的柱形外径和两端球头对应的长孔，所述第三齿轮的第一凹孔是与所述锁定体的柱形外径和两端球头对应的长凹孔，所述上支承轴的第二凹孔是与所述锁定体的柱形外径和两端球头对应的长凹孔，所述锁定体的圆柱直径大于所述阀球上轴套的壁厚。
更进一步，所述锁定体是两端为锥形头的圆柱销，所述第三齿轮的第一凹孔是与所述锁定体的锥形头对应的锥形凹孔，所述上支承轴的第二凹孔是与所述锁定体的锥形头对应的锥形凹孔。
更进一步，为了使介质进口和介质出口的阀座同时与阀球强制密封，所述阀座驱动强制密封球阀设有第二阀座和第二阀座驱动环，所述第二阀座驱动环设有第二齿盘，所述第二齿盘与一只第四齿轮啮合，所述第四齿轮与一只第五齿轮同轴同步转动，所述第五齿轮与所述第三齿轮啮合，所述第一阀座和第二阀座在所述阀座驱动强制密封球阀关闭时均与所述阀球抱合。
更进一步，另一种阀杆与阀球和第一阀座之间的驱动结构为，所述阀杆与所述阀球转轴同轴，所述阀杆设有第六齿轮，所述第六齿轮与一只轴承座转动配合，所述第六齿轮与一只第七齿轮啮合，所述第一阀座驱动环设有第一齿盘，所述第一齿盘与一只第八齿轮啮合，所述第七齿轮和第八齿轮同轴同步转动；所述阀球设有阀球上转轴，所述阀球上转轴与第六齿轮转动配合，所述阀球上转轴的端面设有凸块，所述第六齿轮的内孔设有拨动所述凸块、使所述球阀向所述开启方向转动的拨块，所述阀球设有一块阀球传动板，所述阀球传动板设有一个贯通的第二通孔，所述第六齿轮的上端面设有位置对应于所述第二通孔的第三凹孔，所述轴承座的下端面设有位置对应于所述第二通孔的第四凹孔；所述锁定体以间隙配合安装在所述第二通孔中，所述锁定体大于所述阀球传动板的厚度。
更进一步，所述锁定体具有第一端面和第二端面；所述第三齿轮的第一 凹孔包括用于与所述第一端面配合的第一配合面；所述上支承轴的第二凹孔包括用于与所述第二端面配合的第二配合面。其中，所述第一端面和所述第一配合面接触时，所述第一配合面对所述第一端面施加沿着所述第一通孔的轴线将所述锁定体从所述第一凹孔中推出的第一分力，以及与所述第一通孔的轴线垂直的第二分力。
更进一步，所述第一端面为半球形凸面；所述第一配合面为半球形凹面。
更进一步，所述第二端面为半球形凸面；所述第二配合面为半球形凹面。
更进一步，所述第一端面为锥形凸面；所述第一配合面为锥形凹面。
更进一步，所述第二端面为锥形凸面；所述第二配合面为锥形凹面。
更进一步，所述阀座驱动强制密封球阀还包括设置在所述第一阀座和所述阀体之间的限旋体。
更进一步，所述限旋体为沿着所述第一阀座的往复移动方向延伸；所述限旋体可插设在所述阀体或所述第一阀座中。
本公开的有益效果是：采用阀座移动方式实现球阀的强制密封，降低了结构复杂性；采用锁定体控制阀杆与阀球和第一阀座之间的连接关系，实现了一只阀杆操作球阀的开启、关闭和强制密封，操作方便，操作稳定性和可靠性好。
下面结合附图和实施例对本公开作一详细描述。
附图说明
图1是本公开整体结构图，锁定体是两端为球头的圆柱销；
图2是本公开结构分解图；
图3是本公开阀球转动部分结构图；
图4是本公开阀球开启状态示意图；
图5是本公开阀球从开启位置向关闭位置转动示意图；
图6是本公开阀球转动到关闭位置，阀杆继续驱动阀座移动的示意图；
图7是本公开阀座与阀球抱合状态示意图；
图8是本公开阀座脱离抱合，阀杆开始通过拨块驱动阀球开始向开启方向转动的示意图；
图9是本公开阀杆驱动阀球开始向开启方向转动过程的示意图；
图10是本公开阀座与阀座驱动环之间设有齿形滚柱的结构图；
图11是本公开阀球转动部分结构图，锁定体是两端为球头的圆柱销，锁定体的轴线平行于阀杆的转动轴线；
图12是图11的结构分解图；
图13是本公开阀球转动部分结构图，锁定体是两端为锥形的圆柱销；
图14是图13的结构分解图；
图15是本公开阀球转动部分结构图，锁定体是圆球形锁定体；
图16是图15的结构分解图；
图17是本公开球阀介质进口侧和介质出口侧均设有强制密封的阀座的结构图；
图18是本公开阀杆轴线与阀球转动轴线同轴的结构图；
图19是图18的传动部分分解图。
具体实施方式
如图1至图10，一种阀座驱动强制密封球阀,包括阀体10、第一阀座20、阀球30和阀杆40，所述阀杆驱动所述阀球在开关位置之间往复转动，同时所述阀杆驱动所述第一阀座向所述阀球方向往复移动，在所述阀球关闭时与所述阀球抱合实现强制密封。
所述第一阀座由第一阀座驱动环50驱动向阀球方向往复移动，所述阀杆驱动所述第一阀座驱动环转动，所述第一阀座驱动环设有内螺纹51，所述第一阀座设有外螺纹21，所述第一阀座驱动环通过螺纹连接驱动所述第一阀座向阀球方向往复移动。
如图10所示，所述第一阀座驱动环的内螺纹与所述第一阀座的外螺纹之间设有滚柱53和保持架54，所述滚柱设置在所述保持架中，所述滚柱同时与所述第一阀座驱动环的内螺纹和所述第一阀座的外螺纹啮合。
所述阀杆通过锁定体60驱动所述阀球转向关闭；所述阀球从开启位置向关闭位置转动时(如图4、图5所示)，所述锁定体锁定所述阀杆和阀球的连接关系，使所述阀杆驱动阀球转动，当阀球转动到关闭位置后(如图6所示)， 所述锁定体解除所述阀杆和阀球的连接关系，并将所述阀球锁定在关闭位置，所述阀杆继续驱动所述第一阀座移动，使所述第一阀座与阀球抱合；在所述阀座驱动强制密封球阀开启过程中，所述阀杆驱动所述第一阀座向脱离所述阀球抱合方向移动(如图7、图8所示)，所述第一阀座脱离与阀球的抱合后，所述锁定体解除阀球在所述关闭位置的锁定、并锁定所述阀杆和阀球的连接关系(如图9所示)，所述阀杆驱动所述阀球转动到开启位置。
所述阀杆设有第一齿轮41和第二齿轮42，所述第一阀座驱动环设有第一齿盘52，所述第一齿轮与所述第一齿盘啮合；所述阀球设有阀球上轴套31，所述阀球上轴套的内孔与一个上支承轴11转动配合，所述阀球上轴套的外柱面以转动配合安装有第三齿轮32，所述第二齿轮与所述第三齿轮啮合；所述阀球上轴套的轴套壁设有一个贯通的第一通孔33，所述第三齿轮的轴孔内侧设有位置对应于所述第一通孔的第一凹孔34，所述上支承轴的外柱面设有位置对应于所述第一通孔的第二凹孔12；所述锁定体以间隙配合安装在所述第一通孔中，所述锁定体的长度L大于所述阀球上轴套的壁厚K；所述第三齿轮设有拨动所述球阀向所述开启方向转动的拨块35。
所述锁定体60是两端为球头的圆柱销(如图1至图10所示)，所述阀球上轴套的轴套壁的第一通孔33是与所述锁定体的柱形外径对应的通孔，所述第三齿轮的第一凹孔34是与所述锁定体的球头对应的球形凹孔，所述上支承轴的第二凹孔12是与所述锁定体的球头对应的球形凹孔。
如图11、图12，所述锁定体60是两端为球头的圆柱销，所述锁定体的轴线平行于阀杆的转动轴线，所述阀球上轴套的轴套壁的第一通孔33a是与所述锁定体的柱形外径和两端球头对应的长孔，所述第三齿轮的第一凹孔34a是与所述锁定体的柱形外径和两端球头对应的长凹孔，所述上支承轴的第二凹孔12a是与所述锁定体的柱形外径和两端球头对应的长凹孔，所述锁定体的圆柱直径d1大于所述阀球上轴套的壁厚。
如图13、图14，所述锁定体是两端为锥形头的圆柱销6b，所述第三齿轮的第一凹孔34b是与所述锁定体的锥形头对应的锥形凹孔，所述上支承轴的第二凹孔12b是与所述锁定体的锥形头对应的锥形凹孔。
如图17，所述阀座驱动强制密封球阀设有第二阀座2b和第二阀座驱动 环5b，所述第二阀座驱动环设有第二齿盘55，所述第二齿盘与一只第四齿轮56啮合，所述第四齿轮与一只第五齿轮57同轴同步转动，所述第五齿轮与所述第三齿轮32啮合，所述第一阀座和第二阀座在所述阀座驱动强制密封球阀关闭时均与所述阀球抱合。
如图18、图19，所述阀杆40与所述阀球30转轴同轴，所述阀杆设有第六齿轮70，所述第六齿轮与一只轴承座16转动配合，所述第六齿轮与一只第七齿轮71啮合，所述第一阀座驱动环50设有第一齿盘52，所述第一齿盘与一只第八齿轮72啮合，所述第七齿轮和第八齿轮同轴同步转动；所述阀球设有阀球上转轴38，所述阀球上转轴与第六齿轮转动配合，所述阀球上转轴的端面设有凸块39，所述第六齿轮的内孔设有拨动所述凸块、使所述球阀向所述开启方向转动的拨块73，所述阀球设有一块阀球传动板3a，所述阀球传动板设有一个贯通的第二通孔3b，所述第六齿轮的上端面设有位置对应于所述第二通孔的第三凹孔74，所述轴承座的下端面设有位置对应于所述第二通孔的第四凹孔18；所述锁定体60以间隙配合安装在所述第二通孔中。
所述锁定体的长度约等于第三凹孔的深度加第二通孔的深度；所述圆球形锁定体的直径约等于第四凹孔的深度加第二通孔的深度。
当阀球处于全关位时，第二通孔与第四凹孔对齐。当阀球处于其他位置时，第二通孔与第三凹孔对齐。只有当锁定体切换位置时，第二通孔同时与第三凹孔和第四凹孔对齐。
实施例一：
如图1至图9，一种阀座驱动强制密封球阀,包括阀体10、第一阀座20、阀球30和阀杆40，第一阀座由第一阀座驱动环50驱动向阀球方向往复移动。
第一阀座20是位于阀座驱动强制密封球阀的介质流入端的阀座，可选的，第一阀座设有限旋体如四只限旋柱23，与阀体连接，第一阀座设有外螺纹21，第一阀座与阀体之间设有密封圈22。
第一阀座驱动环设有内螺纹51，第一阀座驱动环通过螺纹连接驱动所述第一阀座向阀球方向往复移动，第一阀座驱动环设有第一齿盘52，第一齿盘是锥齿。有一个第一驱动环盖58安装在第一阀座驱动环的第一齿盘一端。
阀杆垂直于第一阀座的轴线，阀杆从阀体上盖13伸入阀体，阀杆设有第 一齿轮41和第二齿轮42，第一齿轮和第二齿轮与阀杆同步转动。第一齿轮是锥齿，第一齿轮与第一齿盘啮合。
阀球安装在阀体内，阀球的下端设有扇形凸起36。阀体设有与阀球的下转轴对应的下转轴腔14，下转轴腔设有与阀球下转轴的端头的扇形凸起对应的限位凹槽15。使阀球的转动行程限制在90°。
阀球设有阀球上轴套31，阀体上盖设有一个上支承轴11，阀球上轴套的内孔与上支承轴转动配合。阀球上轴套的外柱面以转动配合安装有第三齿轮32，第二齿轮与所述第三齿轮啮合；阀球上轴套的轴套壁设有一个贯通的第一通孔33，第三齿轮的内孔设有位置对应于第一通孔的第一凹孔34，上支承轴的外柱面设有位置对应于第一通孔的第二凹孔12；第一通孔中设有一只间隙配合的锁定体60，锁定体沿第一通孔的轴线往复移动。锁定体是两端为球头的圆柱销，第三齿轮的第一凹孔34是球形凹孔，球形凹孔的深度等于锁定体球形的半径。上支承轴的第二凹孔12是球形凹孔，球形凹孔的深度也等于锁定体球形的半径。阀球上轴套的壁厚K略大于锁定体的圆柱段长度与一个球头半径之和L1(如图3所示)。锁定体能够位于第一通孔33和第一凹孔34构成的空间中，此时，阀球上轴套与第三齿轮同步转动得以锁定(即阀球与第三齿轮同步转动)。球形的锁定体也能够位于第一通孔33和第二凹孔12构成的空间中，此时，阀球上轴套与上支承轴相对位置锁定，第三齿轮可以相对阀球及上轴套转动。阀球上轴套的上端面设有凸块37，第三齿轮设有拨块35，第三齿轮的拨块35拨动凸块37使球阀向开启方向转动。
阀杆通过锁定体60驱动阀球从开向关转动；当阀球处于开启位置时，如图4所示，锁定体被约束在第一通孔33和第一凹孔34构成的空间中，第一凹孔对锁定体的作用力有两个分力，分力一带动锁定体随着转动，分力二将锁定体向远离第一凹孔方向推。在被约束在第一通孔33和第一凹孔34构成的空间时，分力二被上支承轴11的柱面平衡，因此锁定体锁定了阀球上轴套与第三齿轮之间的连接关系，在阀座驱动强制密封球阀关闭过程中，阀球从开启位置向关闭位置转动时(如图4、图5所示)，阀杆带动阀球同步转动。当阀球转动到关闭位置(如图6所示)后，阀体的限位凹槽15限制了阀球继续转动，此时阀球上轴套的第一凹孔34和第一通孔33同步转动到与上支承 轴的第二凹孔12对齐的位置，继续转动阀杆，此时所述分力一受阀体限位15的限制得以平衡，所述分力二将会推动锁定体离开第一凹孔在第一通孔内移动并进入第一通孔33和第二凹孔12构成的空间中，锁定体解除阀杆和阀球的连接关系，并将阀球与上支撑轴11锁定，使阀球保持在关闭位置。阀杆继续转动时，第三齿轮在阀球上轴套上转动，阀杆通过第一齿轮驱动第一阀座驱动环50转动，第一阀座驱动环通过螺纹驱动第一阀座向阀球方向移动，使第一阀座与阀球抱合，如图7所示。
在阀座驱动强制密封球阀开启过程中，阀杆首先通过第一阀座驱动环驱动第一阀座向脱离所述抱合方向移动(如图7、图8所示)，此时，第三齿轮在阀球上轴套上转动，由于锁定体被约束在第一通孔33和第二凹孔12构成的空间中，不会驱动阀球转动。第一阀座脱离与阀球的抱合达到预先设定的间隙后，第三齿轮的第一凹孔34转动到与阀球上轴套的第一通孔33对齐的位置，如图8所示，同时，第三齿轮的拨块35开始拨动凸块37使阀球上轴套向开启方向转动，阀球上轴套转动时第二凹孔对锁定体的作用力使锁定体脱出上支承轴的第二凹孔12，锁定体进入第一通孔33和第一凹孔34构成的空间中，锁定体重新锁定了第三齿轮和阀球上轴套的连接关系，如图9所示，阀杆继续转动，直至将阀球驱动到开启位置。
本实施例中，阀杆的驱动行程大于阀球的转动行程，阀杆在阀球的开启和关闭行程区间同时驱动阀球和第一阀座，此时阀球和第一阀座留有间隙，阀球可以轻松转动。在阀球到达关闭位置后，第一阀座与阀球间仍然留有间隙，阀杆继续转动将只驱动第一阀座的往复移动，从而实现了球阀的强制密封，以及阀球旋转时与阀座脱开而无摩擦的旋转。
实施例二：
一种阀座驱动强制密封球阀，本实施例是实施例一所述的一种阀座驱动强制密封球阀的改进。
如图10所示，本实施例中，第一阀座驱动环的内螺纹与第一阀座的外螺纹之间设有齿形滚柱53和保持架54，齿形滚柱设置在保持架中，齿形滚柱同时与第一阀座驱动环的内螺纹和第一阀座的外螺纹啮合。
本实施例采用了滚柱实现第一阀座驱动环与第一阀座螺纹之间的传动， 将螺纹之间的滑动摩擦改善为滚柱的滚动摩擦，可显著降低球阀的操作力矩，在大口径、高压力的管道中具有显著的优势。
实施例三：
一种阀座驱动强制密封球阀，本实施例是实施例一所述的一种阀座驱动强制密封球阀的结构替代。
如图11、图12，锁定体60是两端为球头的圆柱销，锁定体的轴线平行于阀杆的转动轴线，阀球上轴套的轴套壁的第一通孔33a是两端为半圆弧的长孔，第一通孔与锁定体的柱形外径和两端球头相对应。第三齿轮的第一凹孔34a是长凹孔，更进一步是两端为球面的半圆槽，第一凹孔与锁定体的柱形外径和两端球头相对应。类似于第一凹孔，上支承轴的第二凹孔12a是长凹孔，与锁定体的柱形外径和两端球头相对应。为了使锁定体能够分别锁定阀球与第三齿轮和阀球与上支承轴，锁定体的圆柱直径d1大于阀球上轴套的壁厚，本实施例中，阀球上轴套的壁厚K略大于锁定体的圆柱半径。
实施例四：
如图13、图14，一种阀座驱动强制密封球阀，本实施例是实施例一所述的一种阀座驱动强制密封球阀的结构替代。
本实施例中，锁定体是两端为锥形头的圆柱销6b，所述第三齿轮的第一凹孔是与锁定体的锥形头对应的锥形凹孔34b，上支承轴的第二凹孔12b是与锁定体的锥形头对应的锥形凹孔。
锁定体的长度大于阀球上轴套的壁厚K，锁定体的长度约等于阀球上轴套的壁厚与第一凹孔的深度之和，锁定体的长度也约等于阀球上轴套的壁厚与第二凹孔的深度之和；使锁定体能够进入第一通孔33和第一凹孔34b构成的空间中，也能够进入第一通孔33和第二凹孔12b构成的空间中。
实施例五：
如图15、图16，本实施例中，锁定体6c是一个圆球，第三齿轮的第一凹孔34c是与锁定体的圆球形对应的半球形凹孔，上支承轴的第二凹孔12c是与锁定体的圆球形对应的半球形凹孔。
为了使锁定体能够分别锁定阀球与第三齿轮和阀球与上支承轴，球形锁定体的半径大于阀球上轴套的壁厚，本实施例中，阀球上轴套的壁厚K略大 于锁定体的球形半径，锁定体能够进入第一通孔33和第一凹孔34c构成的空间中，也能够进入第一通孔33和第二凹孔12c构成的空间中。
实施例六：
一种阀座驱动强制密封球阀，本实施例是实施例一所述的一种阀座驱动强制密封球阀的结构扩展。
如图17，本实施例中，阀座包括第一阀座20和第二阀座2b，第一阀座和第二阀座分别设置在球阀的介质进口侧和介质出口侧。阀座驱动环包括驱动第一阀座的第一阀座驱动环50和驱动第二阀座的第二阀座驱动环5b，第一阀座驱动环设有第一齿盘52，第二阀座驱动环设有第二齿盘55，第二齿盘与一只第四齿轮56啮合，第四齿轮与一只第五齿轮57同轴同步转动，第五齿轮与所述第三齿轮32啮合，第一阀座和第二阀座在阀座驱动强制密封球阀关闭时同时与阀球抱合。
本实施例中，阀杆通过第二齿轮42、第三齿轮32，第五齿轮57和第四齿轮56驱动第二阀座，使球阀的介质进口和介质出口的阀座同时与阀球强制密封，增强了球阀的关闭效果。还可以使两阀座之间的阀腔部分在关闭之后处于与介质隔离的状态，可对其进行清洗等维护工作。
实施例七：
一种阀座驱动强制密封球阀，本实施例是实施例一所述的一种阀座驱动强制密封球阀的结构变形。
如图18、图19，阀座驱动强制密封球阀包括阀体10、第一阀座20、阀球30和阀杆40，第一阀座由第一阀座驱动环50驱动向阀球方向往复移动。第一阀座20和第一阀座驱动环50与实施例一相同。本实施例中，阀杆40与阀球30的转动轴线同轴，阀杆的端头设有第六齿轮70，阀杆的端头穿过一只轴承座16通过方轴带动第六齿轮转动，第六齿轮与轴承座16的内孔转动配合。第六齿轮与一只第七齿轮71啮合，第一阀座驱动环50设有第一齿盘52，第一齿盘52与一只第八齿轮72啮合，第七齿轮和第八齿轮安装在一支中间传动轴17上、作为中间传动齿轮同轴同步转动。
阀球设有阀球上转轴38，阀球上转轴与第六齿轮转动配合，阀球上转轴的端面设有凸块39，第六齿轮的内孔设有拨动凸块39、使球阀向所述开启方 向转动的拨块73。阀球设有一块阀球传动板3a，阀球传动板深入轴承座16与第六齿轮70之间，阀球传动板设有一个贯通的第二通孔3b，第二通孔的轴线平行于所述阀球的转动轴线。第二通孔中设有锁定体，本实施例的锁定体采用实施例三所述的两端为球头的圆柱销6a。第六齿轮的上端面设有位置对应于所述第二通孔的第三凹孔74，所述轴承座的下端面设有位置对应于所述第二通孔的第四凹孔18。锁定体60以间隙配合安装在所述第二通孔中，锁定体的长度大于所述阀球传动板的厚度，锁定体的长度约等于阀球传动板的厚度与第三凹孔的深度之和，锁定体的长度也约等于阀球传动板的厚度与第四凹孔的深度之和。
与实施例一的阀座驱动强制密封球阀向类似，阀杆通过锁定体6a驱动阀球转动。当阀球处于开启位置时，锁定体通过第二通孔和第三凹孔锁定阀球传动板与第六齿轮的连接关系，在阀座驱动强制密封球阀关闭过程中，阀球从开启位置向关闭位置转动时，阀杆带动阀球同步转动。当阀球转动到关闭位置后，阀体的限位凹槽15(参考图2)限制了阀球继续转动，此时第三凹孔74和第二通孔3b同步转动到与轴承座的第四凹孔18对应的位置，当阀杆带动第六齿轮继续转动时，第六齿轮的第三凹孔74推动锁定体6a，使锁定体进入第二通孔3b和第四凹孔18构成的空间中，锁定体解除阀杆和阀球的连接关系，同时锁定阀球传动板3a与轴承座16的连接关系，阀杆继续转动时，第六齿轮在阀球上转轴38上转动，阀杆通过第六齿轮驱动第七齿轮转动，与第七齿轮同步转动的第八齿轮驱动第一阀座驱动环50转动，第一阀座驱动环通过螺纹驱动第一阀座向阀球方向移动，使第一阀座与阀球抱合。
在阀座驱动强制密封球阀开启过程中，阀杆首先通过第一阀座驱动环驱动第一阀座向脱离所述抱合方向移动，此时，第六齿轮在阀球上转轴38上转动，不会驱动阀球转动。第一阀座脱离与阀球的抱合并达到预设的转动间隙后，第六齿轮在阀球上转轴上转动到第六齿轮的第三凹孔74与第二通孔3b和第四凹孔18对齐的位置，同时，第六齿轮的拨块73开始拨动阀球上转轴的端面的凸块39、使阀球向开启方向转动，阀球转动时使锁定体脱出轴承座16的第四凹孔18，锁定体进入第二通孔3b和第三凹孔74构成的空间中，锁定体重新锁定第六齿轮和阀球上转轴的连接关系，此时，轴承座16下端面约 束锁定体使之保持在第二通孔3b和第三凹孔74构成的空间中。阀杆继续带动阀球转动，直至将阀球驱动到开启位置。
需要说明的是，本实施例中第六齿轮也可以直接啮合第一齿盘，第七齿轮和第八齿轮以及中间传动轴17并不是必须的结构，可以去掉从而使整个机构更为简洁。
另外，本公开列举的实施例均以顶装式阀体为例。事实上，实现本公开的技术方案并不受阀体形式的限制，阀体可以是侧装式或全焊接式。

Claims (17)

  1. 一种阀座驱动强制密封球阀，包括阀体、第一阀座、阀球和阀杆，其中，所述阀杆驱动所述阀球在开关位置之间往复转动，所述阀杆还驱动所述第一阀座向所述阀球方向往复移动，在所述阀球关闭时与所述阀球抱合实现强制密封。
  2. 根据权利要求1所述的阀座驱动强制密封球阀，其中，所述第一阀座由第一阀座驱动环驱动向阀球方向往复移动，所述阀杆驱动所述第一阀座驱动环转动，所述第一阀座驱动环设有内螺纹，所述第一阀座设有外螺纹，所述第一阀座驱动环通过螺纹连接驱动所述第一阀座向阀球方向往复移动。
  3. 根据权利要求2所述的阀座驱动强制密封球阀，其中，所述第一阀座驱动环的内螺纹与所述第一阀座的外螺纹之间设有滚柱和保持架，所述滚柱设置在所述保持架中，所述滚柱同时与所述第一阀座驱动环的内螺纹和所述第一阀座的外螺纹啮合。
  4. 根据权利要求1所述的阀座驱动强制密封球阀，其中，所述阀杆通过锁定体驱动所述阀球转向关闭；所述阀球从开启位置向关闭位置转动时，所述锁定体锁定所述阀杆和阀球的连接关系，使所述阀杆驱动阀球转动，当阀球转动到关闭位置后，所述锁定体解除所述阀杆和阀球的连接关系，并将所述阀球锁定在关闭位置，所述阀杆继续驱动所述第一阀座移动，使所述第一阀座与阀球抱合；在所述阀座驱动强制密封球阀开启过程中，所述阀杆驱动所述第一阀座向脱离所述阀球抱合方向移动，所述第一阀座脱离与阀球的抱合后，所述锁定体解除阀球在所述关闭位置的锁定、并锁定所述阀杆和阀球的连接关系，所述阀杆驱动所述阀球转动到开启位置。
  5. 根据权利要求4所述的阀座驱动强制密封球阀，其中，所述阀杆设有第一齿轮和第二齿轮，所述第一阀座驱动环设有第一齿盘，所述第一齿轮与所述第一齿盘啮合；所述阀球设有阀球上轴套，所述阀球上轴套的内孔与一个上支承轴转动配合，所述阀球上轴套的外柱面以转动配合安装有第三齿轮，所述第二齿轮与所述第三齿轮啮合；所述阀球上轴套的轴套壁设有一个贯通的第一通孔，所述第三齿轮的轴孔内侧设有位置对应于所述第一通孔的第一 凹孔，所述上支承轴的外柱面设有位置对应于所述第一通孔的第二凹孔；所述锁定体以间隙配合安装在所述第一通孔中，所述锁定体的长度大于所述阀球上轴套的壁厚；所述第三齿轮设有拨动所述阀球向所述开启方向转动的拨块。
  6. 根据权利要求5所述的阀座驱动强制密封球阀，其中，所述锁定体是两端为球头的圆柱销或球形销，所述阀球上轴套的轴套壁的第一通孔是与所述锁定体的柱形外径对应的通孔，所述第三齿轮的第一凹孔是与所述锁定体的球头对应的球形凹孔，所述上支承轴的第二凹孔是与所述锁定体的球头对应的球形凹孔。
  7. 根据权利要求5所述的阀座驱动强制密封球阀，其中，所述锁定体是两端为球头的圆柱销，所述锁定体的轴线平行于阀杆的转动轴线，所述阀球上轴套的轴套壁的第一通孔是与所述锁定体的柱形外径和两端球头对应的长孔，所述第三齿轮的第一凹孔是与所述锁定体的柱形外径和两端球头对应的长凹孔，所述上支承轴的第二凹孔是与所述锁定体的柱形外径和两端球头对应的长凹孔，所述锁定体的圆柱直径大于所述阀球上轴套的壁厚。
  8. 根据权利要求5所述的阀座驱动强制密封球阀，其中，所述锁定体是两端为锥形头的圆柱销，所述第三齿轮的第一凹孔是与所述锁定体的锥形头对应的锥形凹孔，所述上支承轴的第二凹孔是与所述锁定体的锥形头对应的锥形凹孔。
  9. 根据权利要求8所述的阀座驱动强制密封球阀，其中，所述阀座驱动强制密封球阀设有第二阀座和第二阀座驱动环，所述第二阀座驱动环设有第二齿盘，所述第二齿盘与一只第四齿轮啮合，所述第四齿轮与一只第五齿轮同轴同步转动，所述第五齿轮与所述第三齿轮啮合，所述第一阀座和第二阀座在所述阀座驱动强制密封球阀关闭时均与所述阀球抱合。
  10. 根据权利要求4所述的阀座驱动强制密封球阀，其中，所述阀杆与所述阀球转轴同轴，所述阀杆设有第六齿轮，所述第六齿轮与一只轴承座转动配合，所述第六齿轮与一只第七齿轮啮合，所述第一阀座驱动环设有第一齿盘，所述第一齿盘与一只第八齿轮啮合，所述第七齿轮和第八齿轮同轴同步转动；所述阀球设有阀球上转轴，所述阀球上转轴与第六齿轮转动配合， 所述阀球上转轴的端面设有凸块，所述第六齿轮的内孔设有拨动所述凸块、使所述球阀向所述开启方向转动的拨块，所述阀球设有一块阀球传动板，所述阀球传动板设有一个贯通的第二通孔，所述第六齿轮的上端面设有位置对应于所述第二通孔的第三凹孔，所述轴承座的下端面设有位置对应于所述第二通孔的第四凹孔；所述锁定体以间隙配合安装在所述第二通孔中，所述锁定体大于所述阀球传动板的厚度。
  11. 根据权利要求5所述的阀座驱动强制密封球阀，其中，所述锁定体具有第一端面和第二端面；所述第三齿轮的第一凹孔包括用于与所述第一端面配合的第一配合面；所述上支承轴的第二凹孔包括用于与所述第二端面配合的第二配合面；
    其中，所述第一端面和所述第一配合面接触时，所述第一配合面对所述第一端面施加沿着所述第一通孔的轴线将所述锁定体从所述第一凹孔中推出的第一分力，以及与所述第一通孔的轴线垂直的第二分力。
  12. 根据权利要求11所述的阀座驱动强制密封球阀，其中，所述第一端面为半球形凸面；所述第一配合面为半球形凹面。
  13. 根据权利要求12所述的阀座驱动强制密封球阀，其中，所述第二端面为半球形凸面；所述第二配合面为半球形凹面。
  14. 根据权利要求11所述的阀座驱动强制密封球阀，其中，所述第一端面为锥形凸面；所述第一配合面为锥形凹面。
  15. 根据权利要求14所述的阀座驱动强制密封球阀，其中，所述第二端面为锥形凸面；所述第二配合面为锥形凹面。
  16. 根据权利要求1所述的阀座驱动强制密封球阀，还包括设置在所述第一阀座和所述阀体之间的限旋体。
  17. 根据权利要求16所述的阀座驱动强制密封球阀，其中，所述限旋体为沿着所述第一阀座的往复移动方向延伸；所述限旋体可插设在所述阀体或所述第一阀座中。
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