CN110159785B - Improved ball valve - Google Patents

Improved ball valve Download PDF

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Publication number
CN110159785B
CN110159785B CN201910533821.4A CN201910533821A CN110159785B CN 110159785 B CN110159785 B CN 110159785B CN 201910533821 A CN201910533821 A CN 201910533821A CN 110159785 B CN110159785 B CN 110159785B
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CN
China
Prior art keywords
valve
clack
cavity
ball
valve clack
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CN201910533821.4A
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CN110159785A (en
Inventor
不公告发明人
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JIANGTE TECHNOLOGY Co.,Ltd.
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Jiangte Technology Co ltd
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Priority to CN201910533821.4A priority Critical patent/CN110159785B/en
Publication of CN110159785A publication Critical patent/CN110159785A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00Plug 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
    • F16K5/06Plug 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
    • F16K5/0605Plug 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00Plug 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
    • F16K5/08Details
    • F16K5/14Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/20Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
    • F16K5/204Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the plugs or parts of the plugs mechanically pressing the seals against the housing

Abstract

The invention relates to an improved ball valve, which comprises a valve body, wherein a cavity is arranged in the valve body; the left valve cover and the right valve cover are respectively and fixedly arranged at two ends of the valve body; the valve ball is rotatably arranged in the cavity and is internally provided with a left valve cavity and a right valve cavity; the left valve clack and the right valve clack are respectively arranged in the left valve cavity and the right valve cavity; the rotating shaft comprises a rotating rod and a handle; and the control rod comprises a pull rod and a control block. This improved generation ball valve is opening the in-process, and left valve clack, right valve clack do not have friction, wearing and tearing, can increase of service life and improve the reliability.

Description

Improved ball valve
Technical Field
The invention belongs to the technical field of pipeline valves, and particularly relates to an improved ball valve.
Background
In industrial or domestic infrastructure, media are usually conveyed by means of pipelines, which are regulated as a result of pressure or temperature changes, and regulating means, in particular ball valves, are used in the pipelines for regulating the flow in order to ensure optimum operating conditions and environmental safety. Ball valves are generally valves that use a ball with a circular passage as the opening and closing element, and the ball performs the opening and closing action with the rotation of the valve body. The opening and closing part of the ball valve is a ball body with a through hole and rotates around an axis vertical to the channel, so that the aim of opening and closing the channel is fulfilled. A conventional ball valve is generally a ball having a through hole formed therein and mounted on a valve seat to be opened and closed by rotation of the ball. 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, and is widely applied to various departments of petroleum, chemical industry, power generation, paper making, atomic energy, aviation, rockets and the like, and daily life of people. However, in order to ensure that the internal leakage does not occur, the existing ball valve needs to tightly press the ball body, namely the closing member, on the valve seat during installation, the torque is large during opening and closing, the ball body generates friction with the valve seat during rotation, the abrasion is serious, the leakage is easy to cause, the working reliability of the ball valve is reduced, and the service life of the ball valve is shortened.
Disclosure of Invention
The invention aims to solve the technical problem of providing an improved ball valve which has the advantages of reasonable structure, no abrasion between a valve ball and a valve seat, reliable use and long service life.
The technical scheme adopted by the invention for solving the technical problems is as follows: an improved ball valve, its characterized in that: comprises a valve body, wherein a cavity penetrating along the left and right is arranged in the valve body; the left valve cover is fixedly arranged at the left end of the valve body, and a first flow passage communicated with the cavity is arranged in the left valve cover; the right valve cover is fixedly arranged at the right end of the valve body, and a second flow passage communicated with the cavity is arranged in the right valve cover; the valve ball is rotatably arranged in the cavity, a left valve cavity and a right valve cavity are symmetrically arranged at the left end and the right end of the valve ball, a through rectangular through-flow window is arranged in the valve ball, a left communicating groove used for communicating the left valve cavity and the through-flow window is arranged in the valve ball, a right communicating groove used for communicating the right valve cavity and the through-flow window is arranged in the valve ball, and the cross sections of the left communicating groove and the right communicating groove are square; the rotating shaft comprises a rotating rod and a handle, the rotating rod is rotatably arranged on the upper part of the valve body, the lower part of the rotating rod is fixedly connected with the valve ball, the upper part of the rotating rod extends out of the valve body, the handle is arranged on the upper part of the rotating rod along the radial direction of the rotating rod, and a rotating rod through hole which penetrates through the rotating rod in the axial direction is formed in the rotating rod; the left valve clack and the right valve clack are arranged in the left valve cavity in a left-right sliding mode, the right valve clack is arranged in the right valve cavity in a right-left sliding mode, the left valve clack and the right valve clack are identical in structure and respectively comprise a spherical sealing surface, a cylinder, a square connecting rod and a driving block, the spherical sealing surface, the cylinder, the square connecting rod and the driving block are sequentially connected, the cylinder is in sliding fit with the left valve cavity or the right valve cavity, the connecting rod is in sliding fit with the left communicating groove or the right communicating groove, and the driving block is located; the control rod comprises a pull rod and a control block which are sequentially connected from top to bottom, the pull rod is arranged in the through hole of the rotating rod in a vertically sliding manner, the cross section of the control block is rectangular and is arranged in the through-flow window in a vertically sliding manner, a rectangular through-flow groove is formed in the control block, a left communication window and a right communication window which are communicated with the through-flow groove are symmetrically arranged at the left end and the right end of the control block, a second inclined surface is arranged at the upper part of the left communication window, a left stop block is arranged at the lower part of the left communication window, a third inclined surface is arranged at the upper part of the right communication window, and a right stop block is arranged at the lower; when the control rod is positioned at the uppermost position, the driving block of the left valve clack is positioned in the left communicating window, the right end of the driving block of the left valve clack is abutted against the left stop block, the driving block of the right valve clack is positioned in the right communicating window, and the left end of the driving block of the right valve clack is abutted against the right stop block; when the control rod moves downwards from the uppermost end position, the left stop block and the right stop block are respectively separated from the driving blocks of the left valve clack and the right valve clack, then the second inclined surface is in contact with the first inclined surface of the left valve clack to push the left valve clack to move towards the position of the center of a valve ball sphere, and meanwhile, the third inclined surface is in contact with the first inclined surface of the right valve clack to push the right valve clack to move towards the position of the center of the valve ball sphere.
Preferably, a left spring used for pushing the left valve clack to move towards a position far away from the center of the valve ball is arranged in the left valve cavity, and a right spring used for pushing the right valve clack to move towards a position far away from the center of the valve ball is arranged in the right valve cavity.
Preferably, the left spring and the right spring are both belleville springs.
Preferably, a left valve seat is arranged in the left valve cover, and the left valve seat is in sealing fit with the spherical sealing surface of the left valve clack; and a right valve seat is arranged in the right valve cover, and the right valve seat is in sealing fit with the spherical sealing surface of the right valve clack.
Preferably, the handle is characterized by further comprising a pressing rod, the pressing rod is used for driving the control rod to move up and down, a cylindrical pin is arranged on the pulling rod along the radial direction, the cylindrical pin is inserted into a sliding groove at one end of the pressing rod, and the middle of the pressing rod is hinged to the handle.
Preferably, a torsion spring is arranged between the compression bar and the handle, one end of the torsion spring is abutted against the handle, and the other end of the torsion spring is abutted against the compression bar to force the compression bar to rotate downwards.
Compared with the prior art, the invention has the advantages that: when the control valve ball rotates from a closed position to an open position, the control rod is made to move downwards firstly, the control rod pushes the left valve clack and the right valve clack to move towards the position of the ball center of the valve ball, the left valve clack and the right valve clack retract into the left valve cavity and the right valve cavity respectively, and then the rotating shaft is rotated to enable the valve ball to start rotating.
Drawings
FIG. 1 is a schematic view of an assembly structure of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of the present invention with the valve ball in the closed position;
FIG. 3 is a cross-sectional view of an embodiment of the present invention with the control lever moved downward and the left and right petals moved toward the center of the ball;
FIG. 4 is a cross-sectional view of an embodiment of the present invention with the valve ball in the fully open position and the control rod at the lowermost end;
FIG. 5 is a sectional view taken along line A-A of FIG. 4;
FIG. 6 is a cross-sectional view of an embodiment of the present invention with the ball in the fully open position and the control rod uppermost;
FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6;
FIG. 8 is a schematic view of a partial assembly structure according to an embodiment of the present invention
FIG. 9 is a schematic three-dimensional structure of a compression bar according to an embodiment of the present invention;
FIG. 10 is a schematic three-dimensional view of a control stick according to an embodiment of the invention;
FIG. 11 is a schematic view of a control lever according to an embodiment of the present invention;
FIG. 12 is a cross-sectional view taken at C-C of FIG. 11;
FIG. 13 is a schematic three-dimensional structure of the left and right flaps in an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1-13, is a preferred embodiment of the present invention.
A ball valve, comprising
The valve body 1 is provided with a cavity 101 which penetrates along the left and right sides in the valve body 1.
The left valve cover 2a and the left valve cover 2a are fixedly installed at the left end of the valve body 1, a first flow passage 2a1 communicated with the cavity 101 is arranged in the left valve cover 2a, and a left valve seat 8a is arranged in the left valve cover 2 a.
The right valve cover 2b and the right valve cover 2b are fixedly installed at the right end of the valve body 1, a second flow passage 2b1 communicated with the cavity 101 is arranged in the right valve cover 2b, and a right valve seat 8b is arranged in the right valve cover 2 b.
The valve ball 3 is rotatably arranged in the cavity 101, a left valve cavity 3a and a right valve cavity 3b are symmetrically arranged at the left end and the right end of the valve ball 3, a through-flow window 31 which penetrates through the valve ball 3 is arranged in the valve ball 3, a left communicating groove which is used for communicating the left valve cavity 3a with the through-flow window 31 is arranged in the valve ball 3, a right communicating groove which is used for communicating the right valve cavity 3b with the through-flow window 31 is arranged in the valve ball 3, and the cross sections of the left communicating groove and the right communicating groove are square.
The pivot 9, pivot 9 include bull stick 91 and handle 92, and rotatable the establishing in the upper portion of valve body 1 of bull stick 91, the lower part and the valve ball 3 fixed connection of bull stick 91, outside the valve body 1 was stretched out on the upper portion of bull stick 91, handle 92 set up the upper portion at the bull stick 91 along the radial of bull stick 91, are equipped with the axial through-going bull stick through-hole in the bull stick 91.
The valve comprises a left valve clack 6a and a right valve clack 6b, wherein the left valve clack 6a can be arranged in a left valve cavity 3a in a left-right sliding mode, the right valve clack 6b can be arranged in a right valve cavity 3b in a right-left sliding mode, the left valve clack 6a and the right valve clack 6b are identical in structure and respectively comprise a spherical sealing surface 61, a cylinder 62, a square connecting rod 63 and a driving block 64 which are sequentially connected, the cylinder 62 is in sliding fit with the left valve cavity 3a or the right valve cavity 3b, the connecting rod 63 is in sliding fit with a left communicating groove or a right communicating groove, and the driving block 64 is located in the through-flow window 31 and is provided. A left spring 7a used for pushing the left valve clack 6a to move towards a position far away from the sphere center of the valve ball 3 is arranged in the left valve cavity 3a, and a right spring 7b used for pushing the right valve clack 6b to move towards a position far away from the sphere center of the valve ball 3 is arranged in the right valve cavity 3 b. The left spring 7a and the right spring 7b are both belleville springs. The left valve seat 8a is in sealing engagement with the spherical sealing surface 61 of the left valve flap 6a, and the right valve seat 8b is in sealing engagement with the spherical sealing surface 61 of the right valve flap 6 b.
The control rod 4, the control rod 4 is including the pull rod 4b and the control block 4a that from top to bottom connect gradually, and the gliding establishment about the pull rod 4b in the bull stick through-hole, the cross-section of control block 4a be the rectangle and can be gliding establish in through-flow window 31 from top to bottom, is equipped with the overflow groove 41 of rectangle in the control block 4a, the control block 4a about both ends symmetry be equipped with through-flow groove 41 the left side intercommunication window 43 and the right side intercommunication window 42 that are linked together, the upper portion of left side intercommunication window 43 is equipped with second inclined plane 431, the lower part of left side intercommunication window 43 is equipped with left backstop 432, the upper portion of right side intercommunication window 42 is equipped with third inclined plane 421, the lower part of right side intercommunication window 42 is equipped with right backstop.
The pressing rod 5 is used for driving the control rod 4 to move up and down, the pull rod 4b is provided with a cylindrical pin along the radial direction, the cylindrical pin is inserted into a sliding groove 51 at one end of the pressing rod 5, and the middle part of the pressing rod 5 is hinged on the handle 92. A torsion spring 10 is arranged between the compression bar 5 and the handle 92, one end of the torsion spring 10 is propped against the handle 92, and the other end is propped against the compression bar 5 for forcing the compression bar 5 to rotate downwards.
When the control rod 4 is located at the uppermost position, the driving block 64 of the left valve flap is located in the left communication window 43 and the right end of the driving block abuts against the left stop block 432, and the driving block 64 of the right valve flap is located in the right communication window 42 and the left end of the driving block abuts against the right stop block 422; when the control rod 4 moves downwards from the uppermost position, the left and right stop blocks 432 and 422 are respectively disengaged from the driving blocks 64 of the left and right valve flaps, and then the second inclined surface 431 contacts with the first inclined surface 641 of the left valve flap to push the left valve flap 6a to move towards the position of the sphere center of the valve ball 3, and simultaneously the third inclined surface 421 contacts with the first inclined surface 641 of the right valve flap to push the right valve flap 6b to move towards the position of the sphere center of the valve ball 3.
The working principle and the process of the invention are as follows:
as shown in fig. 2, when the valve ball 3 is in the closed position, the pressure lever 5 is in the downward rotating position under the action of the torsion spring 10 to pull the control lever 4 to the uppermost position, the driving block 64 of the left valve flap is located in the left communication window 43 and the right end thereof abuts against the left stop block 432, the driving block 64 of the right valve flap is located in the right communication window 42 and the left end thereof abuts against the right stop block 422, the axis of the through-flow window 31 is perpendicular to the axes of the first flow passage 2a1 and the second flow passage 2b1, the left valve flap 6a is located at the leftmost end of the left valve chamber 3a, the spherical sealing surface 61 of the left valve flap 6a presses against the left valve seat 8a to form a seal, the right valve flap 6b is located at the rightmost end of the right valve chamber 3b, the spherical sealing surface 61 of the right valve flap 6b presses against the right valve seat 8b to form a seal, and the first flow passage 2a 1.
When the valve ball 3 needs to be opened, as shown in fig. 3, firstly, the pressure rod 5 is pinched upwards by hand, the pressure rod 5 drives the control rod 4 to move downwards, the left stop block 432 and the right stop block 422 are respectively separated from the driving blocks 64 of the left valve flap and the right valve flap, then the second inclined surface 431 is contacted with the first inclined surface 641 of the left valve flap to push the left valve flap 6a to move towards the spherical center of the valve ball 3, and simultaneously the third inclined surface 421 is contacted with the first inclined surface 641 of the right valve flap to push the right valve flap 6b to move towards the spherical center of the valve ball 3. The left valve flap 6a thus moves in the direction of the centre of sphere along the left valve chamber 3a out of contact with the left valve seat 8a, and the right valve flap 6b moves in the direction of the centre of sphere along the right valve chamber 3b out of contact with the right valve seat 8 b. Then, the lever 5 and the handle 92 are held by hand and rotated by 90 degrees, as shown in fig. 4, the axis of the flow-through window 31 coincides with the axes of the first flow passage 2a1 and the second flow passage 2b1, and the first flow passage 2a1 communicates with the second flow passage 2a2 through the flow-through window 31. Then, the pressure lever 5 is released, and as shown in fig. 6 and 7, under the action of the torsion spring 10, the left spring 7a and the right spring 7b, the left valve flap 6a completely extends out of the left valve cavity 3a, and the right valve flap 6b completely extends out of the right valve cavity 3 b. Thus, in the opening process of the valve ball 3, the left valve clack 6a and the left valve seat 8a have no friction and no abrasion, and the right valve clack 6b and the right valve seat 8b have no friction and no abrasion.
When the valve ball 3 needs to be turned from opening to closing, firstly, a hand is used to pinch the pressure rod 5 upwards, the pressure rod 5 drives the control rod 4 to move downwards, the left stop block 432 and the right stop block 422 are respectively separated from the driving blocks 64 of the left valve clack and the right valve clack, then the second inclined surface 431 is contacted with the first inclined surface 641 of the left valve clack to push the left valve clack 6a to move towards the sphere center of the valve ball 3, and simultaneously the third inclined surface 421 is contacted with the first inclined surface 641 of the right valve clack to push the right valve clack 6b to move towards the sphere center of the valve ball 3, so that the left valve clack 6a retracts into the left valve cavity 3a completely, and the right valve clack 6b retracts into the right valve cavity 3. Then, after the pressure lever 5 and the handle 92 are held by hand and rotated 90 degrees in the opposite direction, as shown in fig. 2, the axis of the through-flow window 31 is perpendicular to the axes of the first flow passage 2a1 and the second flow passage 2b1, the first flow passage 2a1 is not communicated with the second flow passage 2a2, then the pressure lever 5 is released, under the action of the torsion spring 10, the left spring 7a and the right spring 7b, the left valve clack 6a is pushed by the control rod 4 to fully extend out of the left valve cavity 3a to form a seal with the left valve seat 8a, and the right valve clack 6b is fully extended out of the right valve cavity 3b to form a seal with the right valve seat 8 b. Thus, in the closing process of the valve ball 3, the left valve clack 6a and the left valve seat 8a have no friction and no abrasion, and the right valve clack 6b and the right valve seat 8b have no friction and no abrasion.

Claims (2)

1. An improved ball valve, its characterized in that: comprises that
The valve comprises a valve body (1), wherein a cavity (101) which penetrates through the valve body (1) along the left and right is arranged in the valve body;
the left valve cover (2a) is fixedly arranged at the left end of the valve body (1), and a first flow channel (2a1) communicated with the cavity (101) is arranged in the left valve cover (2 a);
the right valve cover (2b), the right valve cover (2b) is fixedly arranged at the right end of the valve body (1), and a second flow passage (2b1) communicated with the cavity (101) is arranged in the right valve cover (2 b);
the valve ball (3) is rotatably arranged in the cavity (101), a left valve cavity (3a) and a right valve cavity (3b) are symmetrically arranged at the left end and the right end of the valve ball (3), a through rectangular through-flow window (31) is arranged in the valve ball (3), a left communicating groove used for communicating the left valve cavity (3a) with the through-flow window (31) is arranged in the valve ball (3), a right communicating groove used for communicating the right valve cavity (3b) with the through-flow window (31) is arranged in the valve ball (3), and the cross sections of the left communicating groove and the right communicating groove are square;
the rotary valve comprises a rotary shaft (9), wherein the rotary shaft (9) comprises a rotary rod (91) and a handle (92), the rotary rod (91) is rotatably arranged on the upper part of a valve body (1), the lower part of the rotary rod (91) is fixedly connected with a valve ball (3), the upper part of the rotary rod (91) extends out of the valve body (1), the handle (92) is arranged on the upper part of the rotary rod (91) along the radial direction of the rotary rod (91), and a rotary rod through hole which penetrates through the rotary rod (91) in the axial direction is formed in the rotary rod (91);
the valve comprises a left valve clack (6a) and a right valve clack (6b), wherein the left valve clack (6a) can be arranged in a left valve cavity (3a) in a left-right sliding mode, the right valve clack (6b) can be arranged in a right valve cavity (3b) in a left-right sliding mode, the left valve clack (6a) and the right valve clack (6b) are identical in structure and respectively comprise a spherical sealing surface (61), a cylinder (62), a square connecting rod (63) and a driving block (64) which are sequentially connected, wherein the cylinder (62) is in sliding fit with the left valve cavity (3a) or the right valve cavity (3b), the connecting rod (63) is in sliding fit with a left communicating groove or a right communicating groove, and the driving block (64) is located in a through-flow window (31);
the control rod (4), the control rod (4) includes a pull rod (4b) and a control block (4a) which are sequentially connected from top to bottom, the pull rod (4b) can be vertically slidably arranged in the through hole of the rotating rod, the cross section of the control block (4a) is rectangular and can be vertically slidably arranged in the through flow window (31), a rectangular through flow groove (41) is arranged in the control block (4a), a left communication window (43) and a right communication window (42) which are communicated with the through flow groove (41) are symmetrically arranged at the left end and the right end of the control block (4a), the upper part of the left communication window (43) is provided with a second inclined surface (431), the lower part of the left communication window (43) is provided with a left stop block (432), the upper part of the right communication window (42) is provided with a third inclined surface (421), and the lower part of the right communication window (42) is provided with a right stop;
when the control rod (4) is positioned at the uppermost end, the driving block (64) of the left valve clack is positioned in the left communication window (43) and the right end of the driving block is propped against the left stop block (432), and the driving block (64) of the right valve clack is positioned in the right communication window (42) and the left end of the driving block is propped against the right stop block (422); when the control rod (4) moves downwards from the uppermost position, the left stop block (432) and the right stop block (422) are respectively separated from the driving blocks (64) of the left valve clack and the right valve clack, then the second inclined surface (431) is in contact with the first inclined surface (641) of the left valve clack to push the left valve clack (6a) to move towards the position of the sphere center of the valve ball (3), and simultaneously the third inclined surface (421) is in contact with the first inclined surface (641) of the right valve clack to push the right valve clack (6b) to move towards the position of the sphere center of the valve ball (3);
a left spring (7a) used for pushing the left valve clack (6a) to move to a position far away from the spherical center of the valve ball (3) is arranged in the left valve cavity (3a), and a right spring (7b) used for pushing the right valve clack (6b) to move to a position far away from the spherical center of the valve ball (3) is arranged in the right valve cavity (3 b); a left valve seat (8a) is arranged in the left valve cover (2a), and the left valve seat (8a) is in sealing fit with a spherical sealing surface (61) of the left valve clack (6 a); a right valve seat (8b) is arranged in the right valve cover (2b), and the right valve seat (8b) is in sealing fit with a spherical sealing surface (61) of the right valve clack (6 b);
the pressing rod (5) is used for driving the control rod (4) to move up and down, the pull rod (4b) is provided with a cylindrical pin along the radial direction, the cylindrical pin is inserted into a sliding groove (51) at one end of the pressing rod (5), and the middle part of the pressing rod (5) is hinged to the handle (92); a torsion spring (10) is arranged between the compression bar (5) and the handle (92), one end of the torsion spring (10) is abutted against the handle (92), and the other end of the torsion spring is abutted against the compression bar (5) to force the compression bar (5) to rotate downwards;
when the valve ball (3) needs to be opened, firstly, a hand is used for pinching the pressure rod (5) upwards, the pressure rod (5) drives the control rod (4) to move downwards, the left stop block (432) and the right stop block (422) are respectively separated from the driving blocks (64) of the left valve clack and the right valve clack, then the second inclined surface (431) is in contact with the first inclined surface (641) of the left valve clack to push the left valve clack (6a) to move towards the position of the ball center of the valve ball (3), and meanwhile, the third inclined surface (421) is in contact with the first inclined surface (641) of the right valve clack to push the right valve clack (6b) to move towards the position of the ball center of the valve; the left valve clack (6a) moves along the left valve cavity (3a) to the direction of the sphere center to be separated from the contact with the left valve seat (8a), and the right valve clack (6b) moves along the right valve cavity (3b) to the direction of the sphere center to be separated from the contact with the right valve seat (8 b); then the pressure lever (5) and the handle (92) are held by hands to rotate 90 degrees, the axis of the through-flow window (31) is overlapped with the axes of the first flow passage (2a1) and the second flow passage (2b1), and the first flow passage (2a1) is communicated with the second flow passage (2a2) through the through-flow window (31); finally, the pressure lever (5) is loosened, and under the acting force of the torsion spring (10), the left spring (7a) and the right spring (7b), the left valve clack (6a) completely extends out of the left valve cavity (3a), and the right valve clack (6b) completely extends out of the right valve cavity (3 b);
when the valve ball (3) needs to be turned from opening to closing, firstly, a hand is used for pinching the pressure lever (5) upwards, the pressure lever (5) drives the control rod (4) to move downwards, the left stop block (432) and the right stop block (422) are separated from the driving blocks (64) of the left valve clack and the right valve clack respectively, then the second inclined surface (431) is in contact with the first inclined surface (641) of the left valve clack to push the left valve clack (6a) to move towards the position of the sphere center of the valve ball (3), meanwhile, the third inclined surface (421) is in contact with the first inclined surface (641) of the right valve clack to push the right valve clack (6b) to move towards the position of the sphere center of the valve ball (3), the left valve clack (6a) retracts into the left valve cavity (3a) completely, and the right valve clack (6 b; then, after the pressure lever (5) and the handle (92) are held by hands and rotated for 90 degrees in the opposite direction, the axis of the through-flow window (31) is vertical to the axes of the first flow passage (2a1) and the second flow passage (2b1), and the first flow passage (2a1) is not communicated with the second flow passage (2a 2); and finally, the compression rod (5) is loosened, under the acting force of the torsion spring (10), the left spring (7a) and the right spring (7b), the left valve clack (6a) completely extends out of the left valve cavity (3a) to form sealing with the left valve seat (8a) through the pushing of the control rod (4), and the right valve clack (6b) completely extends out of the right valve cavity (3b) to form sealing with the right valve seat (8 b).
2. An improved ball valve as defined in claim 1, wherein: the left spring (7a) and the right spring (7b) are both belleville springs.
CN201910533821.4A 2019-06-19 2019-06-19 Improved ball valve Active CN110159785B (en)

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CN111396572A (en) * 2020-03-26 2020-07-10 韩国昊 Butterfly valve
CN111795171B (en) * 2020-07-03 2023-06-23 天津市中核科技实业有限公司 Long service life ball valve
CN111765265B (en) * 2020-07-07 2023-09-29 盐城市精工阀门有限公司 Plug valve
CN112096906B (en) * 2020-07-27 2023-01-03 西安交通大学 Telescopic frictionless ball valve driven by cooperation of linear motor and rotating motor
CN112066027B (en) * 2020-09-09 2022-03-18 替科斯科技集团丽水流体设备有限公司 Heat supply abrasion-resistant ball valve
CN113803490A (en) * 2021-11-01 2021-12-17 陈功强 Semi-ball valve
CN115031034B (en) * 2022-06-07 2023-06-30 阿伐流体控制有限公司 Wear-resisting C type ball valve

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