CN111536254A

CN111536254A - Low-torque high-pressure ball valve

Info

Publication number: CN111536254A
Application number: CN202010360634.3A
Authority: CN
Inventors: 韩国昊; 李红生; 邵倩倩
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-08-14

Abstract

The invention belongs to the technical field of pipeline valves, and discloses a low-torque high-pressure ball valve which comprises a valve body, a valve ball, a valve seat and a rotating shaft, wherein the valve body is provided with a valve ball hole; the valve body is provided with a flow inlet and a flow outlet, the valve ball is positioned in the valve body and consists of a ball body and a connecting end, the ball body is provided with a through hole, and the connecting end is connected with the rotating shaft; the inlet end and the outlet end in the valve body are respectively provided with a valve seat, and the end part of the valve seat is provided with a sealing element and can reciprocate along the flowing direction of a medium to form selective contact sealing with the outer surface of the ball body; before the rotating shaft drives the valve ball to rotate, the valve seat moves and is kept at a position separated from the contact with the valve ball; in the process that the rotating shaft drives the valve ball to rotate, the valve seat synchronously moves to a position which forms contact sealing with the valve ball. The low-torque high-pressure ball valve can reduce the abrasion between the valve ball and the sealing element, prolong the service life of the sealing element, improve the sealing effect and prolong the service life and improve the stability of the ball valve.

Description

Low-torque high-pressure ball valve

Technical Field

The invention belongs to the technical field of pipeline valves, and particularly relates to a low-torque high-pressure ball valve.

Background

In industrial or civil infrastructure, pipelines are often used to transport media. Since the piping is regulated due to a change in pressure or temperature, a regulating mechanism is used in the piping to regulate the flow rate, thereby ensuring optimum working conditions and environmental safety. 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 the industrial fields of petroleum, chemical industry, power generation, paper making, atomic energy, aviation, rockets and the like and pipeline medium transportation of daily life.

In conventional ball valves, the closure is typically sealed by a soft seal. However, due to the restriction of the sealing material, for example, the soft sealing material has a small applicable temperature range, low high temperature, high pressure and corrosion resistance and a short service life, and thus, in the special working conditions requiring the high-parameter and high-performance ball valve, such as ore pulp, ash, dust and the like, the soft sealing opening and closing mode cannot be used, and the hard sealing mode is required.

The conventional hard sealing ball valve generally comprises a valve body, a valve cover, a valve ball, a valve seat and a valve rod, and when the hard sealing ball valve is used, the valve rod is rotated to drive the valve ball at the lower end of the valve rod to rotate, so that a through hole in the valve ball corresponds to or is staggered with a flow passage of the valve, and the opening or closing of the ball valve is realized. However, under a high-pressure working condition, the sealing force between the valve seat and the valve ball is large, so that large friction is generated between the valve seat and the valve ball in the rotating process of the valve ball, the abrasion of a sealing element is serious, leakage is caused, the working reliability of the ball valve is reduced, and the service life of the ball valve is shortened.

Disclosure of Invention

In order to solve the problems of the conventional hard seal ball valve, the invention provides a low-torque high-pressure ball valve. The low-torque high-pressure ball valve comprises a valve body, a valve ball, a valve seat and a rotating shaft; the valve body is provided with a flow inlet and a flow outlet, the valve ball is positioned in the valve body and consists of a ball body and a connecting end, the ball body is provided with a through hole, and the connecting end is connected with the rotating shaft; the valve seat is arranged at the inlet end and the outlet end in the valve body respectively, and the end part of the valve seat is provided with a sealing element and can reciprocate along the flowing direction of a medium to form selective contact sealing with the outer surface of the ball body;

before the rotating shaft drives the valve ball to rotate, the valve seat moves and is kept at a position where the valve seat is separated from the valve ball; in the process that the rotating shaft drives the valve ball to rotate, the valve seat synchronously moves to a position where the valve seat and the valve ball form contact sealing.

Preferably, the low-torque high-pressure ball valve comprises a rotary disc and a driving rod; the connecting ends of the rotary disc and the valve ball are coaxially arranged, the rotary disc can rotate in the circumferential direction relative to the valve ball, and the outer circumferential surface of the rotary disc is oval and comprises two long shaft ends and two short shaft ends; one end of the driving rod is connected with the valve seat, and the other end of the driving rod is in contact with the outer circumferential surface of the rotary disc; when the turntable rotates to the two short shaft ends to be respectively contacted with the two driving rods, the driving rods drive the valve seat to move to the position where the valve seat is in contact sealing with the ball body, and when the turntable rotates to the two long shaft ends to be contacted with the two driving rods, the driving rods drive the valve seat to move to the position where the valve seat is separated from the ball body.

Further preferably, the low-torque high-pressure ball valve further comprises a first elastic member; the first elastic element is positioned between the valve body and the valve seat to drive the valve seat to move and maintain contact sealing with the ball.

Preferably, the turntable is further provided with a control end, the control end is coaxially sleeved outside the connecting end and can perform reciprocating rotation in the circumferential direction relative to the connecting end; the rotating shaft and the control end form a coaxial fixed connection so as to drive the control end to carry out circumferential reciprocating rotation; the control end is provided with a 90-degree arc groove, the connecting end is provided with a connecting rod, one end of the connecting rod is connected with the connecting end, and the other end of the connecting rod is positioned in the arc groove and can rotate in a reciprocating manner relative to the arc groove;

when the ball rotates to cut off the flow inlet and the flow outlet and the valve seat and the ball form contact seal, the connecting rod is kept in contact with one terminal end of the arc groove; when the ball body rotates to communicate the flow inlet and the flow outlet, and the valve seat and the ball body form contact seal, the connecting rod is kept in contact with the other terminal end of the arc groove.

Preferably, the valve body is provided with an arc control groove with a central angle of 180 degrees, and the rotating shaft is provided with a control plate; one end of the control plate is connected with the outer circumferential surface of the rotating shaft, the other end of the control plate extends into the control groove, and the control groove is divided into a first control groove and a second control groove along the circumferential direction; the first control groove and the second control groove are alternately communicated with a high-pressure medium and a low-pressure medium to drive the control plate to rotate in the control grooves in a reciprocating mode.

Preferably, the rotating shaft is provided with a first drainage hole and a second drainage hole, and the valve body is provided with a third drainage hole, a fourth drainage hole, a fifth drainage hole and a sixth drainage hole; one end of the first drainage hole is communicated with the first control groove, the other end of the first drainage hole is communicated with the third drainage hole, one end of the second drainage hole is communicated with the second control groove, the other end of the second drainage hole is communicated with the fourth drainage hole, one end of the fifth drainage hole is communicated with the inflow port, the other end of the fifth drainage hole is communicated with the third drainage hole and the fourth drainage hole to form selective communication, one end of the sixth drainage hole is communicated with the outflow port, and the other end of the sixth drainage hole is communicated with the third drainage hole and the fourth drainage hole to form selective communication.

Further preferably, the low-torque high-pressure ball valve is also provided with a handle; the mounting surface of the handle is provided with a first connecting groove and a second connecting groove which are not communicated with each other, and the handle can rotate relative to the valve body in the circumferential direction; the third drainage hole, the fourth drainage hole, the fifth drainage hole and the sixth drainage hole are positioned on the plane of the valve body connected with the handle and are distributed on the same circumference; the handle carries out the circumferencial direction for the valve body rotates, can make first connecting groove will third drainage hole with fifth drainage hole intercommunication and the second connecting groove will fourth drainage hole with sixth drainage hole intercommunication, perhaps makes first connecting groove will third drainage hole with sixth drainage hole intercommunication and the second connecting groove will fourth drainage hole with fifth drainage hole intercommunication.

Preferably, the valve body is designed in a split structure and comprises a body and a connecting block; the valve ball is positioned in the body, and the connecting block is positioned between the body and the handle and is detachably connected with the body and the handle; and the connecting block is provided with pore channels which are respectively communicated with the third drainage hole, the fourth drainage hole, the fifth drainage hole and the sixth drainage hole, and the distribution position relation among the third drainage hole, the fourth drainage hole, the fifth drainage hole and the sixth drainage hole is readjusted.

Preferably, the inlet and the outlet are provided with sleeve openings; one end of the sleeve opening is connected with the valve body through threads to form detachable fixed connection, and the other end of the sleeve opening is connected with an external pipeline.

Preferably, the valve body still includes a mounting panel, the mounting panel with the valve body can be dismantled and be connected for the dismouting the valve ball.

Compared with a hard sealing ball valve in a traditional structure form, the low-torque high-pressure ball valve has the following beneficial technical effects:

1. in the low-torque high-pressure ball valve, the valve seat is designed into a structural form capable of independently reciprocating relative to the valve ball in the valve body, so that the position of the valve seat can be adjusted in advance to be separated from the contact with the valve ball before the valve ball is driven to rotate and is driven to rotate, the valve seat synchronously moves in the reverse direction in the rotating process of the valve ball, namely the valve seat synchronously moves to the position in contact with the outer circumferential surface of the ball along with the rotation of the valve ball, and the valve seat is in sealing contact with the valve ball again when the valve ball rotates. Therefore, the non-contact rotation operation of the valve ball and the valve seat can be realized, and the contact friction between the valve ball and the sealing element in the valve seat in the rotation process is avoided, so that the rotation torque of the valve ball and the abrasion damage to the sealing element are reduced, and the flexibility of the reversing operation of the whole low-torque high-pressure ball valve, the service life of the sealing element and the sealing effect are improved.

2. In the invention, the connecting rod is arranged at the connecting end, the arc groove with 90 degrees is arranged at the control end, and the connecting rod can perform relative reciprocating motion in the arc groove. At this moment, carry out 90 degrees pivoted in-process at the control end for the link, can drive the carousel alone and rotate to drive the disk seat to break away from with spheroidal contact, carry out 90 degrees pivoted in-process again together at the control end drive connecting rod, the link drives the valve ball and turns to, when the carousel rotates simultaneously to disk seat reverse motion to with spheroidal recontacting. Therefore, the action sequence of the rotary disc and the valve ball can be controlled by the rotary drive of the rotary shaft, so that the free rotation of the valve ball and the valve seat in a non-contact state can be accurately controlled, the automatic control is realized, and the convenience of operation is improved.

3. In the invention, the control groove is arranged on the valve body part, the control plate is arranged on the rotating shaft and extends into the control groove to divide the control groove into a first control groove and a second control groove, and meanwhile, the first control groove and the second control groove are in selective communication with the flow inlet and the flow outlet through the drainage hole and a first connecting groove and a second connecting groove which are arranged on the handle. At the moment, the medium drive control panel can be used for reciprocating rotation according to the medium pressure difference between the inflow opening and the outflow opening and the rotation of the handle, so that the rotating shaft is driven to rotate, and the steering operation of the whole valve ball is completed. Like this, just can greatly reduced by handle direct drive pivot pivoted driving force and moment of torsion, reduce this ball valve and turn to the degree of difficulty of operation to can satisfy the operation that turns to of ball valve in bigger size, bigger moment of torsion and the higher pressure operating mode, improve the result of use and the availability factor of this ball valve.

Drawings

FIG. 1 is a schematic structural diagram of a low-torque high-pressure ball valve according to the present embodiment in a closed state;

FIG. 2 is a schematic structural view of a cross section taken along the direction M-M in FIG. 1;

FIG. 3 is a schematic structural view of a cross section in the direction N-N in FIG. 1;

FIG. 4 is a schematic structural view of a cross section taken along the direction Q-Q in FIG. 1;

FIG. 5 is a schematic structural view of a cross section taken along the direction P-P in FIG. 1;

FIG. 6 is a partial schematic structural view of the positions of the third drainage hole and the fourth drainage hole in the valve body of the present embodiment;

FIG. 7 is a schematic structural diagram of the low-torque high-pressure ball valve according to the present embodiment, wherein the rotating shaft rotates 90 degrees from the position shown in FIG. 1;

FIG. 8 is a schematic structural view of a cross section taken along the direction M-M in FIG. 7;

FIG. 9 is a schematic view of the cross section taken in the direction N-N of FIG. 7;

FIG. 10 is a schematic view of a cross-section taken along the line Q-Q of FIG. 7;

FIG. 11 is a schematic structural view of a cross-section taken along the line P-P in FIG. 7;

FIG. 12 is a schematic structural diagram of the low-torque high-pressure ball valve of the present embodiment in an open state;

FIG. 13 is a schematic structural view of a cross section taken along the direction M-M in FIG. 12;

FIG. 14 is a schematic view of the cross section taken in the direction of N-N in FIG. 12;

FIG. 15 is a schematic view of the cross-section taken along the line Q-Q in FIG. 12;

fig. 16 is a schematic structural view of a cross section in the direction P-P in fig. 12.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Referring to fig. 1 to 6, the low-torque high-pressure ball valve of the present embodiment includes a valve body 1, a valve ball 2, a valve seat 3, and a rotating shaft 4. The valve body 1 is provided with a flow inlet 11 and a flow outlet 12 which are positioned in the same straight direction, and the valve ball 2 is positioned in the valve body 1 and consists of a ball body 21 and a connecting end 22. The ball 21 is located between the inlet 11 and the outlet 12 and has a through hole 211, and the connecting end 22 is perpendicular to the straight line of the inlet 11 and the outlet 12 and is connected to the rotating shaft 4. Meanwhile, a valve seat 3 is respectively arranged at the end of the inflow port 11 and the end of the outflow port 12 inside the valve body 1, wherein the end of the valve seat 3 is provided with a sealing member 31, and the whole valve seat 3 can reciprocate along the medium flowing direction to form selective contact sealing of the sealing member 31 and the outer surface of the ball 21.

Before the rotating shaft 4 drives the valve ball 2 to rotate, the valve seat 3 moves in advance and is kept at a position where the valve seat is separated from the valve ball 2, and when the rotating shaft 4 drives the valve ball 2 to rotate, the valve seat 3 moves synchronously until the valve seat and the valve ball 2 form contact sealing.

Like this, before the valve ball rotated, through the motion of controlling the disk seat in advance for the spheroid, can make the spheroid break away from the contact with the sealing member in the disk seat to eliminate the spheroid when rotating and the disk seat between the sealing member contact friction that forms, reduce the rotation resistance to the valve ball and to the wearing and tearing of sealing member, improve the convenience of operation and to the protection of sealing member, improve the sealed effect and the life of whole ball valve. Meanwhile, in the process of rotating the valve ball, the sealing element is gradually close to the outer circumferential surface of the ball body through synchronous reverse motion of the valve seat, so that the sealing element is in contact with the outer circumferential surface of the ball body again when the ball body turns to the right place, and the sealing efficiency and effect after turning are improved.

As shown in fig. 1 to 6, the low-torque high-pressure ball valve of the present embodiment further includes a rotating disk 5, two driving rods 61, and two elastic members 62. Wherein, the rotary disk 5 is arranged coaxially with the connecting end 22 of the valve ball 2 and can rotate in the circumferential direction relative to the valve ball 2, and the outer circumferential surface of the rotary disk 5 is in an ellipse shape and comprises two long shaft ends and two short shaft ends. One ends of the two driving levers 6 are connected to the two valve seats 3, respectively, and the other ends are simultaneously held in contact with the outer circumferential surface of the rotary table 5. The two elastic members 62 are both of a spiral spring structure, and are respectively sleeved on the two valve seats 3, and both ends of each elastic member are respectively in contact with the valve body 1 and the valve seat 3, so as to drive the valve seats 3 to move towards the direction close to the ball body 21 and keep the valve seats in a contact sealing state with the outer surface of the ball body 21.

At this time, when the rotary disk 5 rotates relative to the valve ball 2 until the two short axis ends thereof contact the two drive rods 61, respectively, the two valve seats 3 are moved and held in a position of forming a contact seal with the outer circumferential surface of the ball 21 by the two elastic members 62; conversely, when the rotary disk 5 rotates relative to the valve ball 2 until the two long axial ends of the rotary disk contact the two driving rods 61, the two valve seats 3 are driven by the two driving rods 61 to move and maintain the positions of the two valve seats out of contact with the outer surface of the ball 21 respectively against the action force of the corresponding elastic members 62.

Therefore, the valve seat can be adjusted relative to the ball body by driving the turntable to rotate in a reciprocating manner in the circumferential direction, utilizing the elliptical outer circumferential surface of the turntable to drive the driving rod in a reciprocating manner along the medium flowing direction and utilizing the elastic piece to drive the valve seat in a reciprocating manner along the medium flowing direction, thereby achieving the control effect of controlling the contact relation between the valve seat and the ball body.

In the embodiment, the driving rod is pressed against the outer circumferential surface of the rotary disk by the acting force of the elastic piece on the valve seat, and the driving of the valve seat in the radial reciprocating motion is formed by utilizing the size difference between the major axis end and the minor axis end in the diameter direction in the elliptic outer circumferential surface of the rotary disk. Similarly, in other embodiments, the driving rod and the outer circumferential surface of the turntable may be designed to be in sliding connection, for example, a circle of sliding groove is formed on the outer circumferential surface of the turntable, and a sliding block is arranged on the driving rod, at this time, the driving rod may be kept in a state of continuous contact with the outer circumferential surface of the turntable by the connection formed by the sliding block and the sliding groove and the relative sliding in the sliding groove, and further, the elliptical outer circumferential surface of the turntable may be used to form the driving control of the reciprocating motion of the valve seat.

In addition, the size of the long axis and the size of the short axis in the oval outer circumferential surface of the rotary table can be adjusted and changed according to the diameter size of the ball, the connecting position of the driving rod and the valve seat and the position of the sealing element in the valve seat, and it is guaranteed that the valve seat can move to be kept in contact with the outer circumferential surface of the ball when the driving rod is in contact with the short axis of the oval outer circumferential surface of the rotary table and can move to be separated from the contact with the outer circumferential surface of the ball when the driving rod is in contact with.

Referring to fig. 1 to 6, the turntable 5 of this embodiment further includes a control end 51, and the control end 51 is coaxially sleeved outside the connection end 22 and can rotate reciprocally in the circumferential direction relative to the connection end 22. The rotating shaft 4 is located at the upper end of the control end 51 and forms a coaxial fixed connection therebetween, and the control end 51 is driven by the rotating shaft 4 to perform circumferential reciprocating rotation, so as to drive the rotating disc 5 to perform circumferential reciprocating rotation. Meanwhile, the control end 51 is provided with a 90-degree arc groove 52 located in the horizontal plane, the connecting end 22 is provided with a connecting rod 23 in the horizontal direction, one end of the connecting rod 23 is fixedly connected with the connecting end 22, the other end of the connecting rod is located in the arc groove 52, and the connecting rod 23 can rotate in a reciprocating mode relative to the arc groove 52, so that the control end 51 can drive the connecting rod 23 to rotate synchronously through the terminal groove surface of the arc groove 52, and the sphere 21 is driven to rotate.

When the ball 21 rotates to cut off the inlet 11 and the outlet 12 and the valve seat 3 forms a contact seal with the ball 21, the connecting rod 23 is kept in contact with one terminal groove surface of the arc groove 52; conversely, when the ball 21 rotates to communicate the inlet 11 and the outlet 12 and the valve seat 3 forms a contact seal with the ball 21, the connecting rod 23 is held in contact with the other terminal groove surface of the circular arc groove 52.

At this moment, at first drive the control end through the pivot and carry out 90 degrees independent rotations, drive the pivot promptly and carry out 90 degrees rotations towards the direction that does not drive the connecting rod and move together, make the control end drive the carousel and rotate to the position of its long axle head and actuating lever contact, make the disk seat break away from with spheroidal contact, the connecting rod forms the contact with another terminal groove face of circular arc groove again this moment, drive the control end through the pivot again and carry out 90 degrees rotations, at this in-process, the control end drives the valve ball through the connecting rod and carries out 90 degrees rotations and accomplish the turn to, the control end drives the carousel simultaneously and rotates to the position of its short axle head and contact with the actuating lever again, make the disk seat form the contact seal with the spheroid again.

Therefore, the rotating operation of the rotary disc and the valve ball can be realized by controlling the rotating shaft to rotate by two 90 degrees successively, so that the operation of pre-driving the rotary disc to rotate before driving the valve ball to rotate so as to remove the sealing contact between the valve seat and the ball body and synchronously driving the rotary disc to rotate to recover the sealing contact between the valve seat and the ball body in the rotating process of the driving valve ball can be realized. In other embodiments, the rotation operation of the rotating disc can be controlled independently by an additional driving mechanism, for example, a separate rotating shaft is additionally arranged to control the rotating disc independently.

Referring to fig. 1 to 6, the valve body 1 of the present embodiment is provided with a circular arc control groove 13 having a central angle of 180 degrees, and the rotary shaft 4 is provided with a control plate 41. Wherein one end of the control plate 41 is connected to the outer circumferential surface of the rotation shaft 4, and the other end extends into the control groove 13, and divides the control groove 13 into a first control groove 131 and a second control groove 132 in the circumferential direction. The first and

second control grooves

131 and 132 are alternately communicated with a high pressure medium and a low pressure medium, so that the control plate 41 is driven to rotate back and forth in the control groove 13 by the pressure difference between the two media.

At the moment, the rotating drive can be formed on the rotating shaft by controlling the medium pressure difference between the first control groove and the second control groove, the hydraulic control effect of the ball valve on steering is formed, and the steering effect of the ball valve on the working condition of high pressure and large torque is improved. Similarly, in other embodiments, the driving of the rotating shaft may be performed in other manners according to the design and the specific use condition, for example, a stepping motor, and the precise control of the rotation angle of the rotating shaft may also be realized by using the steering control of the stepping motor.

In this embodiment, the rotating shaft 4 is provided with a first drainage hole 42 and a second drainage hole 43, and the valve body 1 is provided with a third drainage hole 151, a fourth drainage hole 152, a fifth drainage hole 153 and a sixth drainage hole 154. Wherein, the one end and the first control groove 131 intercommunication of first drainage hole 42, the other end communicates with third drainage hole 151 through an annular groove, the one end and the second control groove 132 intercommunication of second drainage hole 43, the other end communicates with fourth drainage hole 152 through another annular groove, the one end and the influent stream mouth 11 intercommunication of fifth drainage hole 153, the other end forms the selection intercommunication with third drainage hole 151 and fourth drainage hole 152, the one end and the efflux mouth 12 intercommunication of sixth drainage hole 154, the other end forms the selection intercommunication with third drainage hole 151 and fourth drainage hole 152.

At the moment, through controlling the communication relation of the fifth drainage hole and the third drainage hole and the fourth drainage hole and the communication relation of the sixth drainage hole and the third drainage hole and the fourth drainage hole, the high-pressure medium at the inlet can be drained to the first control groove or the second control groove, and the medium in the second control groove or the first control groove is drained to the outlet to release pressure, so that the reciprocating rotation effect of the high-pressure medium at the inlet and the low-pressure medium at the outlet of the ball valve is achieved, the requirement for external control medium is avoided, the pipeline setting for draining the external control medium is omitted, the volume and the overall dimension of the whole ball valve are reduced, and the use convenience is improved. Similarly, in other embodiments, according to the design and the use condition, the fifth drainage hole and the sixth drainage hole can be communicated with the external control oil path even directly, so that the rotation of the rotating shaft can be adjusted and controlled in an external control mode.

As shown in fig. 1 to 6, the low-torque high-pressure ball valve of the present embodiment is further provided with a handle 7. The mounting surface of the handle 7 is provided with a first connecting groove 71 and a second connecting groove 72 which are not communicated with each other, and the handle 7 can rotate in the circumferential direction relative to the valve body 1. Wherein, the third drainage hole 151, the fourth drainage hole 152, the fifth drainage hole 153 and the sixth drainage hole 154 all extend to the plane department of being connected with the handle 7 in the valve body 1, and distribute on same circumference, at this moment, in the handle 7 carries out the in-process of circumferencial direction pivoted for the valve body 1, can make first connecting groove 71 with third drainage hole 151 and fifth drainage hole 153 intercommunication and second connecting groove 72 with fourth drainage hole 152 and sixth drainage hole 154 intercommunication, or make first connecting groove 71 with third drainage hole 151 and sixth drainage hole 154 intercommunication and second connecting groove 72 with fourth drainage hole 152 and fifth drainage hole 153 intercommunication, thereby reach the communicating relation of control inflow mouth and outflow mouth and first control groove and second control groove with the structural style of a two manual four-way valves.

In this embodiment, the pressure of the medium in the first control groove and the second control groove can be controlled by manually driving the handle to rotate back and forth, so as to control the rotating direction of the rotating shaft. Similarly, in other embodiments, other structures, such as a two-position four-way electromagnetic directional valve, may be adopted instead of the handle to electrically control the connection and disconnection between the third drainage hole, the fourth drainage hole, the fifth drainage hole, and the sixth drainage hole.

Meanwhile, in the present embodiment, the valve body 1 is of a split structure, and includes a body 16 and a connecting block 17. Wherein, the valve ball 2 is connected with the body 1, the connecting block 17 is positioned between the body 16 and the handle 7, and is detachably connected with the body 16 and the handle 7, such as a bolt connection. At this moment, utilize first connecting groove and second connecting groove and third drainage hole on the connecting block with the handle, the fourth drainage hole, fifth drainage hole and sixth drainage hole are connected, keeping the third drainage hole like this, the fourth drainage hole, under the unchangeable condition in position is offered to fifth drainage hole and sixth drainage hole at the body part, just can realize being connected with different control structure through changing the different connecting blocks in drainage hole distribution position, for example handle or solenoid valve, thereby can be according to the control mode of this ball valve of different operating mode quick adjustment, increase the control mode variety of this ball valve, improve the availability factor and the use convenience of this ball valve.

In addition, in the present embodiment, the inlet 11 and the outlet 12 are both designed as sockets, that is, one socket 18 is disposed at each of the inlet 11 and the outlet 12, and one end of the socket 18 forms a detachable fixed connection with the body 16 through a threaded connection, and the other end is connected with an external pipeline. Like this, according to the difference of different external pipeline connected mode, for example threaded connection or flange joint, through the cuff of changing corresponding structure just can realize being connected with different external pipeline to further improve the application range of this ball valve, improve convenience and the efficiency of using.

The valve body 1 also comprises a mounting sleeve 19. The mounting sleeve 19 is fixedly connected with the body 16 and is used for directly fixing the ball body 21 and forming threaded connection with the sleeve opening 18, and mounting, positioning and motion guiding are formed on the valve seat 3 and the driving rod 6, so that the stability of the reciprocating motion of the valve seat 3 is ensured, and the reliability of the using action of the whole ball valve is improved.

In addition, the valve body 1 of the present embodiment is further provided with a mounting plate 8. The mounting panel 8 is located the lower extreme position of installation cover 19 to form through threaded connection's mode and installation cover 19 and can dismantle the connection, be used for carrying out quick assembly disassembly to the inside valve ball 2 of installation cover 19 with this, improve the convenience of this ball valve dismouting operation.

Referring to fig. 1 to 16, when the low-torque high-pressure ball valve of the present embodiment works, the inlet 11 is communicated with the external high-pressure pipeline, and the outlet 12 is communicated with the external low-pressure pipeline, and the specific steering operation process is as follows:

when the valve ball 2 is at a position where the inlet 11 and the outlet 12 are cut off, the handle 7 rotates to a position where the first connecting groove 71 communicates the third drainage hole 151 with the sixth drainage hole 154, the second connecting groove 72 communicates the fourth drainage hole 152 with the fifth drainage hole 153, so that the high-pressure medium at the inlet 11 sequentially passes through the fifth drainage hole 153, the fourth drainage hole 152 and the second drainage hole 43 and flows into the second control groove 132, and the first control groove 131 sequentially passes through the first drainage hole 42, the third drainage hole 151 and the sixth drainage hole 154 and communicates with the outlet 12, so that the control panel 41 is maintained at the end position of the first control groove 131. At the same time, the connecting rod 23 is kept in a position of surface contact with one terminal groove of the circular arc groove 52, and the two driving rods 61 are kept in contact with the two short shaft ends of the rotating disc 5, so that the valve seat 4 is kept in a position of contact sealing with the ball 21 under the driving action of the elastic member 62.

When the ball valve needs to be opened, the valve ball 2 rotates 90 degrees and communicates with the inflow port 11 and the outflow port 12 through the through hole 211, the driving handle 7 rotates 90 degrees, the first connecting groove 71 is rotated to a position where the third drainage hole 151 is communicated with the fifth drainage hole 153, the second connecting groove 72 is rotated to a position where the fourth drainage hole 152 is communicated with the sixth drainage hole 154, high-pressure media at the inflow port 11 sequentially pass through the fifth drainage hole 153, the third drainage hole 152 and the first drainage hole 42 and flow into the first control groove 131, the second control groove 132 sequentially passes through the second drainage hole 43, the fourth drainage hole 152 and the sixth drainage hole 154 and communicate with the outflow port 12, and the control plate 41 starts to rotate to the terminal position of the second control groove 132 under the action of the pressure difference of the media between the first control groove 131 and the second control groove 132.

In the process that the control board 41 rotates 90 degrees before rotating along the control slot 13, the rotating shaft 4 drives the rotating disc 5 to rotate 90 degrees synchronously through the control end 51, so that the two driving rods 61 move from the contact with the two short shaft ends in the rotating disc 5 to the contact with the two long shaft ends, and thus the two valve seats 3 are driven to overcome the corresponding elastic pieces 62 respectively and move to the positions far away from the sphere 21, and the contact between the valve seats 3 and the sphere 21 is released. During this process, the circular arc groove 52 at the control end 51 is synchronously rotated through 90 degrees, so that the connecting rod 23 is switched into surface contact with the other terminal groove of the circular arc groove 52 with the holding position unchanged, i.e., the ball 21 is held in the holding position unchanged during the process.

In the process of rotating the control plate 41 for 90 degrees along the control groove 13, the rotating shaft 4 starts to drive the connecting rod 23 to rotate for 90 degrees synchronously through the arc groove 52 at the control end 51, so as to drive the valve ball 21 to rotate for 90 degrees, rotate the through hole 211 to a position communicated with the inlet 11 and the outlet 12, and complete the steering operation of the valve ball 2. Meanwhile, the rotating shaft 4 continues to drive the rotating disc 5 to synchronously rotate 90 degrees through the control end 51, so that the two driving rods 61 move from the contact with the two long shaft ends in the rotating disc 5 to the contact with the two end shaft ends again, the two valve seats 3 move towards the positions close to the ball body 21 under the driving of the corresponding elastic pieces 62 respectively, and finally, the contact sealing is formed with the ball body 21 again, and the whole process from closing to opening of the ball valve is completed.

When the ball valve needs to be opened and closed, the handle is reversely rotated by 90 degrees, the first connecting groove 71 is rotated to the position where the third drainage hole 151 is communicated with the sixth drainage hole 154, the second connecting groove 72 is rotated to the position where the fourth drainage hole 152 is communicated with the fifth drainage hole 153, so that a high-pressure medium at the position of the inflow port 11 sequentially passes through the fifth drainage hole 153, the fourth drainage hole 152 and the second drainage hole 43 and flows into the second control groove 132, the first control groove 131 sequentially passes through the first drainage hole 42, the third drainage hole 151 and the sixth drainage hole 154 and is communicated with the outflow port 12, and the control plate 41 starts to reversely rotate to the terminal position of the first control groove 131 under the action of the medium pressure difference between the first control groove 131 and the second control groove 132.

In the process that the control board 41 rotates 90 degrees before rotating along the control slot 13, the rotating shaft 4 drives the rotating disc 5 to rotate 90 degrees synchronously through the control end 51, so that the two driving rods 61 move from the contact with the two short shaft ends in the rotating disc 5 to the contact with the two long shaft ends, thereby driving the two valve seats 3 to move to the positions far away from the sphere 21 by overcoming the corresponding elastic pieces 62 respectively, and releasing the contact between the valve seats 3 and the sphere 21. During this process, the circular arc groove 52 at the control end 51 is synchronously rotated through 90 degrees, so that the connecting rod 23 is switched into surface contact with the other terminal groove of the circular arc groove 52 with the holding position unchanged, i.e., the ball 21 is held in the holding position unchanged during the process.

In the process of rotating the control plate 41 for 90 degrees along the control groove 13, the rotating shaft 4 starts to drive the connecting rod 23 to rotate for 90 degrees synchronously through the arc groove 52 at the control end 51, so as to drive the valve ball 21 to rotate for 90 degrees, rotate the through hole 211 to a position where the through hole is cut off and communicated with the inlet 11 and the outlet 12, and complete the steering operation of the valve ball 2. Meanwhile, the rotating shaft 4 continues to drive the rotating disc 5 to synchronously rotate 90 degrees through the control end 51, so that the two driving rods 61 move from the contact with the two long shaft ends in the rotating disc 5 to the contact with the two end shaft ends again, the two valve seats 3 move towards the positions close to the ball body 21 under the driving of the corresponding elastic pieces 62 respectively, and finally, the contact sealing is formed with the ball body 21 again, and the whole process from opening to closing of the ball valve is completed.

Claims

1. A low-torque high-pressure ball valve is characterized by comprising a valve body, a valve ball, a valve seat and a rotating shaft; the valve body is provided with a flow inlet and a flow outlet, the valve ball is positioned in the valve body and consists of a ball body and a connecting end, the ball body is provided with a through hole, and the connecting end is connected with the rotating shaft; the valve seat is arranged at the inlet end and the outlet end in the valve body respectively, and the end part of the valve seat is provided with a sealing element and can reciprocate along the flowing direction of a medium to form selective contact sealing with the outer surface of the ball body;

2. The low-torque high-pressure ball valve according to claim 1, comprising a rotary disc and a drive stem; the connecting ends of the rotary disc and the valve ball are coaxially arranged, the rotary disc can rotate in the circumferential direction relative to the valve ball, and the outer circumferential surface of the rotary disc is oval and comprises two long shaft ends and two short shaft ends; one end of the driving rod is connected with the valve seat, and the other end of the driving rod is in contact with the outer circumferential surface of the rotary disc; when the turntable rotates to the two short shaft ends to be respectively contacted with the two driving rods, the driving rods drive the valve seat to move to the position where the valve seat is in contact sealing with the ball body, and when the turntable rotates to the two long shaft ends to be contacted with the two driving rods, the driving rods drive the valve seat to move to the position where the valve seat is separated from the ball body.

3. The low-torque, high-pressure ball valve according to claim 2, further comprising a first resilient member; the first elastic element is positioned between the valve body and the valve seat to drive the valve seat to move and maintain contact sealing with the ball.

4. The low-torque high-pressure ball valve according to claim 2, wherein the rotary disc is further provided with a control end, the control end is coaxially sleeved outside the connecting end and can perform reciprocating rotation in the circumferential direction relative to the connecting end; the rotating shaft and the control end form a coaxial fixed connection so as to drive the control end to carry out circumferential reciprocating rotation; the control end is provided with a 90-degree arc groove, the connecting end is provided with a connecting rod, one end of the connecting rod is connected with the connecting end, and the other end of the connecting rod is positioned in the arc groove and can rotate in a reciprocating manner relative to the arc groove;

5. The low-torque high-pressure ball valve according to claim 4, wherein the valve body is provided with a circular arc control groove with a central angle of 180 degrees, and the rotating shaft is provided with a control plate; one end of the control plate is connected with the outer circumferential surface of the rotating shaft, the other end of the control plate extends into the control groove, and the control groove is divided into a first control groove and a second control groove along the circumferential direction; the first control groove and the second control groove are alternately communicated with a high-pressure medium and a low-pressure medium to drive the control plate to rotate in the control grooves in a reciprocating mode.

6. The low-torque high-pressure ball valve according to claim 5, wherein a first drainage hole and a second drainage hole are formed in the rotating shaft, and a third drainage hole, a fourth drainage hole, a fifth drainage hole and a sixth drainage hole are formed in the valve body; one end of the first drainage hole is communicated with the first control groove, the other end of the first drainage hole is communicated with the third drainage hole, one end of the second drainage hole is communicated with the second control groove, the other end of the second drainage hole is communicated with the fourth drainage hole, one end of the fifth drainage hole is communicated with the inflow port, the other end of the fifth drainage hole is communicated with the third drainage hole and the fourth drainage hole to form selective communication, one end of the sixth drainage hole is communicated with the outflow port, and the other end of the sixth drainage hole is communicated with the third drainage hole and the fourth drainage hole to form selective communication.

7. The low-torque high-pressure ball valve according to claim 6, further comprising a handle; the mounting surface of the handle is provided with a first connecting groove and a second connecting groove which are not communicated with each other, and the handle can rotate relative to the valve body in the circumferential direction; the third drainage hole, the fourth drainage hole, the fifth drainage hole and the sixth drainage hole are positioned on the plane of the valve body connected with the handle and are distributed on the same circumference; the handle carries out the circumferencial direction for the valve body rotates, can make first connecting groove will third drainage hole with fifth drainage hole intercommunication and the second connecting groove will fourth drainage hole with sixth drainage hole intercommunication, perhaps makes first connecting groove will third drainage hole with sixth drainage hole intercommunication and the second connecting groove will fourth drainage hole with fifth drainage hole intercommunication.

8. The low-torque high-pressure ball valve according to claim 7, wherein the valve body is designed in a split structure and comprises a body and a connecting block; the valve ball is positioned in the body, and the connecting block is positioned between the body and the handle and is detachably connected with the body and the handle; and the connecting block is provided with pore channels which are respectively communicated with the third drainage hole, the fourth drainage hole, the fifth drainage hole and the sixth drainage hole, and the distribution position relation among the third drainage hole, the fourth drainage hole, the fifth drainage hole and the sixth drainage hole is readjusted.

9. The low-torque high-pressure ball valve according to any one of claims 1 to 8, wherein a spigot is provided at each of the inlet and the outlet; one end of the sleeve opening is connected with the valve body through threads to form detachable fixed connection, and the other end of the sleeve opening is connected with an external pipeline.

10. The low-torque high-pressure ball valve according to any one of claims 1 to 8, wherein the valve body further comprises a mounting plate detachably connected to the valve body for mounting and dismounting the ball valve.