阅读说明：本技术 一种具有手轮被锁定的球阀 (Ball valve with hand wheel is locked ) 是由 汤裕浩 王学国 汪荣浩 于 2021-09-11 设计创作，主要内容包括：本发明涉及一种具有手轮被锁定的球阀,包括阀体、阀芯及输出轴,阀体内设置有流道,输出轴驱动阀芯转动构成对流道的封闭,包括手轮与锁定杆,输出轴具有延伸至阀体外的驱动端,手轮设置有延伸杆,延伸杆相对远离手轮的一端设置有与驱动端形状相适配的驱动槽,阀体外设置有固定块且固定块位于驱动端外周,锁定杆一端铰接于延伸杆,另一端设置有锁定件,手轮上设置有与锁定件相适配的锁定联动件,固定块设置有多个固定槽,锁定杆上设置有与固定槽大小相适配的固定件,锁定杆与延伸杆之间设置有用于将固定件复位至固定槽的复位弹簧。本发明的目的在于提供一种具有手轮被锁定的球阀,使得手轮在未使用时不会因为意外情况发生转动。(The invention relates to a ball valve with a locked hand wheel, which comprises a valve body, a valve core and an output shaft, wherein a flow passage is arranged in the valve body, the output shaft drives the valve core to rotate to form the sealing of the flow passage, the ball valve comprises a hand wheel and a locking rod, the output shaft is provided with a driving end extending out of the valve body, the hand wheel is provided with an extension rod, one end of the extension rod, which is relatively far away from the hand wheel, is provided with a driving groove matched with the shape of the driving end, a fixed block is arranged outside the valve body and is positioned at the periphery of the driving end, one end of the locking rod is hinged to the extension rod, the other end of the locking rod is provided with a locking linkage piece matched with the locking piece, the fixed block is provided with a plurality of fixing grooves, a fixed piece matched with the fixing grooves in size is arranged on the locking rod, and a reset spring used for resetting the fixed piece to the fixing grooves is arranged between the locking rod and the extension rod. The invention aims to provide a ball valve with a locked hand wheel, so that the hand wheel cannot rotate due to an unexpected condition when not used.)

1. The utility model provides a ball valve with hand wheel is locked, includes valve body, case and output shaft, is provided with the runner in the valve body, and output shaft drive valve core rotates and constitutes the closure to the runner, its characterized in that: the valve comprises a hand wheel and a locking rod, wherein an output shaft is provided with a driving end extending out of a valve body, the hand wheel is provided with an extension rod, one end of the extension rod, which is relatively far away from the hand wheel, is provided with a driving groove matched with the shape of the driving end, a fixing block is arranged outside the valve body and is positioned at the periphery of the driving end and is in rotating fit with the driving end, one end of the locking rod is hinged to the extension rod, the other end of the locking rod is provided with a locking piece, the hand wheel is provided with a locking linkage piece matched with the locking piece, the fixing block is provided with a plurality of fixing grooves, a fixing piece matched with the fixing grooves in size is arranged on the locking rod, a reset spring used for resetting the fixing piece to the fixing grooves is arranged between the locking rod and the extension rod, the locking linkage piece and the locking piece have a locking state and an unlocking state, the locking piece and the locking linkage piece are fixed, the locking rod synchronously rotates along with the extension rod, the hand wheel rotates at the moment, the unlocking state is that the locking piece is separated from the locking linkage piece, the mounting resets to the fixed slot in, and the locking lever is fixed in the fixed block, and the hand wheel is unable to rotate.

2. A ball valve with locked hand wheel according to claim 1, characterized in that: the locking linkage piece include hand wheel piece and movable block, the hand wheel piece is fixed to be set up on the hand wheel and set up in the hand wheel piece and remove the chamber, the movable block sets up in removing the intracavity and the movable block has the extension that extends to the hand wheel piece outside, the extension has the extension inclined plane of its cross-sectional area increase gradually along vertical direction that makes progress, be provided with the locking spring that resets the extension outside removing the chamber between the opposite side of the relative extension of movable block and the hand wheel piece is inside, the locking piece includes the locking piece, the locking piece sets up on the locking lever and perpendicular in the extension rod, the locking piece is provided with the locking groove with the big or small looks adaptation of extension, when locking linkage piece and locking piece are in locking state, the locking lever perpendicular to extension rod, the extension gets into in the locking groove.

3. A ball valve with locked hand wheel according to claim 2, characterized in that: the hand wheel block is provided with a moving groove which is arranged along the moving direction of the moving block and extends to be communicated with the moving cavity, the moving block is provided with a control block, and the control block extends to the outside of the hand wheel block through the moving groove.

4. A ball valve with locked hand wheel according to claim 2, characterized in that: and a hand wheel driving rod for controlling the hand wheel to rotate is arranged above the hand wheel block.

5. A ball valve with locked hand wheel according to claim 1, characterized in that: the valve comprises a gear set, wherein an extension shaft is arranged on a valve core, a driving chamber is arranged in a valve body, the extension shaft and an output shaft extend into the driving chamber, the gear set is arranged in the driving chamber and positioned on the extension shaft and the output shaft, and the gear set forms transmission fit of the output shaft and the extension shaft.

6. A ball valve with locked hand wheel according to claim 5, characterized in that: the gear train include driving gear and driven gear, driven gear set up in extending the axle and with extend the synchronous rotation of axle, the driving gear sets up in the output shaft and with output shaft synchronous rotation, the driving gear meshes with driven gear and the diameter of driving gear is less than driven gear's diameter.

7. A ball valve with locked hand wheel according to claim 5, characterized in that: the valve body on be provided with and extend the relative observation hole of axle, extend epaxial be provided with the synchronous pivoted rotating block of case and the rotating block passes the observation hole, the rotating block is ninety degrees arc form, observe the hole and violently be equipped with the stopper, when the case is in the open mode, rotating block one side offsets with the stopper, when the case is in the closed mode, the rotating block opposite side offsets with the stopper.

8. A ball valve with locked hand wheel according to claim 5, characterized in that: the valve comprises a valve seat, a seat groove matched with the valve seat is arranged in the valve body, the valve seat is arranged in the seat groove and is in sealing fit with a valve core, and a pushing space is arranged between the bottom of the seat groove and the valve seat.

9. A ball valve with locked hand wheel according to claim 8, wherein: the disk seat be close to the tertiary echelonment that seat recess thickness reduced, the disk seat includes one-level ladder, second grade ladder and tertiary ladder, promotes the space and is located between seat recess bottom and the one-level ladder, one-level ladder and seat recess lateral wall are provided with the piston ring that is the H form, are provided with large-scale O type circle between piston ring and the disk seat, are provided with small-size O type circle between piston ring and the disk seat, tertiary ladder lateral wall is provided with the elasticity hole.

10. A ball valve with locked hand wheel according to claim 9, wherein: the valve seat is provided with a contact part which is in sealing fit with the valve core, and a sealing ring which is matched with the valve core in shape is arranged in the contact part.

Technical Field

The invention relates to a ball valve, in particular to a ball valve with a locked hand wheel.

Background

The ball valve is one kind of valve, and the case is as the opening and closing piece, is driven by the valve rod, and the valve that makes rotary motion around the ball valve axis, and the mode that drives the valve rod and rotate has manual drive and mechanical drive two kinds.

At present manual drive's mode is realized by the hand wheel, and operating personnel rotates the hand wheel and then drives the valve core rotation, but when not working, appears the mistake easily and touches the condition of hand wheel, leads to the hand wheel to take place small rotation, leads to the case to take place the skew simultaneously, influences the normal use of ball valve.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the ball valve with the locked hand wheel, so that the hand wheel cannot rotate due to an unexpected condition when not used.

In order to achieve the purpose, the invention provides the following technical scheme: the valve comprises a valve body, a valve core and an output shaft, wherein a flow passage is arranged in the valve body, the valve core is driven by the output shaft to rotate to form the sealing of the flow passage, the valve comprises a hand wheel and a locking rod, the output shaft is provided with a driving end extending out of the valve body, the hand wheel is provided with an extension rod, one end of the extension rod, which is relatively far away from the hand wheel, is provided with a driving groove matched with the shape of the driving end, a fixed block is arranged outside the valve body, the fixed block is positioned at the periphery of the driving end and is in rotating fit with the driving end, one end of the locking rod is hinged to the extension rod, the other end of the locking rod is provided with a locking linkage piece matched with the locking piece, the fixed block is provided with a plurality of fixed grooves, a fixed piece matched with the fixed grooves in size is arranged on the locking rod, a reset spring used for resetting the fixed piece to the fixed grooves is arranged between the locking linkage piece and the locking piece, and the locking linkage piece have a locking state and an unlocking state, the locking state is that the locking piece is fixed with the locking linkage piece, and the locking lever rotates along with the extension rod synchronous, and the hand wheel rotates this moment, and the unblock state is that the locking piece separates with the locking linkage piece, and the mounting resets to in the fixed slot, and the locking lever is fixed in the fixed block, and the hand wheel can't rotate.

By adopting the technical scheme, when the valve core needs to be driven to rotate by using the hand wheel, the locking rod is rotated by overcoming the elasticity of the reset spring, the fixing piece is moved out of the fixing groove, the locking rod and the fixing block can move relatively, the locking rod is hinged with the extension rod, namely, the extension rod can rotate relative to the fixing block, and further the output shaft is driven to rotate, meanwhile, the locking rod is fixed, the locking rod and the hand wheel can be fixed by the locking piece and the locking linkage piece, so that an operator does not need to control the locking rod all the time in the rotation process of the hand wheel, when the valve core does not need to be driven to rotate, the locking piece is separated from the locking linkage piece, the locking piece is far away from the locking linkage piece and the fixing piece enters the fixing groove under the action of the reset spring, the locking rod and the fixing block are fixed, the hand wheel cannot be rotated at the moment, and the hand wheel is fixed on the fixing block to limit of the hand wheel by the locking rod, and only need remove the locking of locking piece and locking linkage, the locking lever just can be under reset spring's effect for the mounting is automatic to get into in the fixed slot, avoids touching the running state that the hand wheel changed the ball valve because of the mistake.

The invention is further configured to: the locking linkage piece include hand wheel piece and movable block, the hand wheel piece is fixed to be set up on the hand wheel and set up in the hand wheel piece and remove the chamber, the movable block sets up in removing the intracavity and the movable block has the extension that extends to the hand wheel piece outside, the extension has the extension inclined plane of its cross-sectional area increase gradually along vertical direction that makes progress, be provided with the locking spring that resets the extension outside removing the chamber between the opposite side of the relative extension of movable block and the hand wheel piece is inside, the locking piece includes the locking piece, the locking piece sets up on the locking lever and perpendicular in the extension rod, the locking piece is provided with the locking groove with the big or small looks adaptation of extension, when locking linkage piece and locking piece are in locking state, the locking lever perpendicular to extension rod, the extension gets into in the locking groove.

Through adopting above-mentioned technical scheme, be fixed in the hand wheel as needs with the locking lever, when needing to drive the valve core rotation through the hand wheel promptly, rotate the locking lever, make the locking lever use with the extension rod pin joint as the centre of a circle rotation, the locking block is close to the extension gradually, and because the extension has the extension inclined plane, when the locking block contacts with the extension inclined plane, can promote the extension to removing the intracavity gradually, until the locking groove is relative with the extension, the extension gets into the locking groove under locking spring's drive, locking lever perpendicular to extension rod this moment, be parallel with the hand wheel promptly, just can drive the hand wheel and rotate this moment, and when not needing the hand wheel to rotate, press the extension, make the extension get into completely and remove the intracavity, the locking lever is under reset spring's effect, make locking block and hand wheel piece separate from, reach the effect of locking through the removal of locking block to the movable block.

The invention is further configured to: the hand wheel block is provided with a moving groove which is arranged along the moving direction of the moving block and extends to be communicated with the moving cavity, the moving block is provided with a control block, and the control block extends to the outside of the hand wheel block through the moving groove.

By adopting the technical scheme, when the moving block needs to be controlled to move, the control block can be driven to further drive the moving block, the extending part does not need to be directly pressed, and the operation is convenient and fast.

The invention is further configured to: and a hand wheel driving rod for controlling the hand wheel to rotate is arranged above the hand wheel block.

Through adopting above-mentioned technical scheme, operating personnel accessible hand wheel actuating lever reaches the drive to the hand wheel, the simple operation, and the hand wheel actuating lever sets up the application of force more directly on the hand wheel piece.

The invention is further configured to: the valve comprises a gear set, wherein an extension shaft is arranged on a valve core, a driving chamber is arranged in a valve body, the extension shaft and an output shaft extend into the driving chamber, the gear set is arranged in the driving chamber and positioned on the extension shaft and the output shaft, and the gear set forms transmission fit of the output shaft and the extension shaft.

Through adopting above-mentioned technical scheme, the output shaft passes through the gear train and drives the extension axle and rotate, thereby it rotates to drive the case, finally play the purpose of opening and closing the ball valve, among the prior art, connect the output shaft and extend the axle through the valve rod, it is spacing to need extra support to carry out the concentricity to the valve rod, and the deformation of valve rod appears easily for longer valve rod, the distortion, cause the damage of valve rod, lead to needing to change the valve rod, thereby maintenance personal's work burden has been increased, and this scheme adopts the gear train transmission, need not to guarantee to extend the concentricity between axle and the output shaft, and the use of valve rod and support has been omitted, the cost is reduced, and no valve rod can make the shared volume of holistic ball valve also more pleasing to the eye when littleer.

The invention is further configured to: the gear train include driving gear and driven gear, driven gear set up in extending the axle and with extend the synchronous rotation of axle, the driving gear sets up in the output shaft and with output shaft synchronous rotation, the driving gear meshes with driven gear and the diameter of driving gear is less than driven gear's diameter.

Through adopting above-mentioned technical scheme, operating personnel passes through the output shaft drive driving gear and rotates to drive driven gear and rotate and because the diameter of driving gear is less than driven gear's diameter, operating personnel can drive the case with less moment of torsion promptly, reduce the instantaneous moment output of operating personnel.

The invention is further configured to: the valve body on be provided with and extend the relative observation hole of axle, extend epaxial be provided with the synchronous pivoted rotating block of case and the rotating block passes the observation hole, the rotating block is ninety degrees arc form, observe the hole and violently be equipped with the stopper, when the case is in the open mode, rotating block one side offsets with the stopper, when the case is in the closed mode, the rotating block opposite side offsets with the stopper.

Through adopting above-mentioned technical scheme, when the case rotates, extend the synchronous rotation of axle, and lie in the turning block that extends the axle and rotate simultaneously, when the case was opened completely, one side and stopper one end of turning block offset, and when the case was closed gradually, the turning block rotated, until the case was closed completely, the opposite side of turning block would offset with the other end of stopper, the observation hole that the turning block can only be between the stopper both ends promptly rotates, reach the purpose spacing to the case, prevent excessively opening and excessively closing of case, cause the damage of function.

The invention is further configured to: the valve comprises a valve seat, a seat groove matched with the valve seat is arranged in the valve body, the valve seat is arranged in the seat groove and is in sealing fit with a valve core, and a pushing space is arranged between the bottom of the seat groove and the valve seat.

By adopting the technical scheme, when the valve core is closed, the medium valve core blocks one end of the flow channel and cannot flow to the other end of the flow channel, and the pressure on one side of the flow channel blocked by the valve core is gradually increased, so that part of the medium flows to the pushing space, the acting force in the direction of the valve core is applied to the valve seat, and the valve seat and the valve core are in closer contact.

The invention is further configured to: the disk seat be close to the tertiary echelonment that seat recess thickness reduced, the disk seat includes one-level ladder, second grade ladder and tertiary ladder, promotes the space and is located between seat recess bottom and the one-level ladder, one-level ladder and seat recess lateral wall are provided with the piston ring that is the H form, are provided with large-scale O type circle between piston ring and the disk seat, are provided with small-size O type circle between piston ring and the disk seat, tertiary ladder lateral wall is provided with the elasticity hole.

Through adopting above-mentioned technical scheme, the disk seat is tertiary echelonment for when closing the ball valve, the medium flow direction promotes in the space, thereby promotes the piston ring, and then drives that whole disk seat is inseparabler with the contact of case, improves the leakproofness of disk seat and case.

The invention is further configured to: the valve seat is provided with a contact part which is in sealing fit with the valve core, and a sealing ring which is matched with the valve core in shape is arranged in the contact part.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a partial enlarged view E of the present invention;

FIG. 3 is an exploded view of the hand wheel and associated components of the present invention;

FIG. 4 is a cross-sectional view of the locking link of the present invention;

FIG. 5 is a top view of the present invention in its entirety;

FIG. 6 is a cross-sectional view A-A of the present invention as a whole;

FIG. 7 is a cross-sectional view B-B of the present invention as a whole;

FIG. 8 is a partial enlarged view of FIG. C according to the present invention;

fig. 9 is a partial enlarged view D of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-9, the present invention discloses a ball valve with a locked handwheel, which comprises a valve body 1, a valve core 2 and an output shaft 31, wherein a flow passage 6 is arranged in the valve body 1, the output shaft 31 drives the valve core 2 to rotate to form a seal for the flow passage 6, the ball valve comprises a handwheel 71 and a locking rod 72, the output shaft 31 has a driving end 731 extending out of the valve body 1, the handwheel 71 is provided with an extension rod 711, one end of the extension rod 711 relatively far away from the handwheel 71 is provided with a driving groove 7111 matched with the shape of the driving end 731, the valve body 1 is externally provided with a fixing block 73, the fixing block 73 is positioned at the periphery of the driving end and is rotatably matched with the driving end 731, one end of the locking rod 72 is hinged to the extension rod 711, the other end is provided with a locking piece 721, the handwheel 71 is provided with a locking linkage piece 74 matched with the locking piece 721, the fixing block 73 is provided with a plurality of fixing grooves 731, the locking piece 72 is provided with a fixing piece 75 matched with the size of the fixing grooves 731, a reset spring 76 for resetting the fixing piece 75 to the fixing groove 731 is arranged between the locking rod 72 and the extension rod 711, the locking linkage piece 74 and the locking piece 721 have a locking state and an unlocking state, the locking piece 721 is fixed to the locking linkage piece 74 in the locking state, the locking rod 72 rotates synchronously with the extension rod 711, the hand wheel 71 rotates at the moment, the locking piece 721 is separated from the locking linkage piece 74 in the unlocking state, the fixing piece 75 is reset to the fixing groove 731, the locking rod 72 is fixed to the fixing block 73, the hand wheel 71 cannot rotate, when the valve core 2 needs to be driven by the hand wheel 71 to rotate, the locking rod 72 is rotated against the elastic force of the reset spring 76, the fixing piece 75 is removed from the fixing groove 731, the locking rod 72 and the fixing block 73 can move relatively at the moment, the locking rod 72 is hinged to the extension rod 711, namely, the extension rod 711 can rotate relative to the fixing block 73, and further drive the output shaft 31 to rotate, meanwhile, in order to fix the locking rod 72, the locking rod 72 and the hand wheel 71 can be fixed through the locking piece 721 and the locking linkage piece 74, so that an operator does not need to control the locking rod 72 all the time during the rotation of the hand wheel 71, when it is not necessary to drive the valve element 2 to rotate, the locking member 721 is disengaged from the locking linkage 74, the locking rod 72 is under the action of the return spring 76, the locking piece 721 is far away from the locking linkage piece 74 and the fixing piece 75 enters the fixing groove 731, so that the locking rod 72 is fixed with the fixing block 73, at this time, the hand wheel 71 cannot be rotated, by fixing the locking rod 72 on the fixed block 73 to the hand wheel 71, and only by releasing the locking of the locking piece 721 and the locking linkage 74, the locking rod 72 will be under the action of the return spring 76, the fixing member 75 automatically enters the fixing groove 731, so that the change of the operation state of the ball valve due to the mistaken touch of the hand wheel 71 is avoided.

The locking linkage 74 comprises a hand wheel block 741 and a moving block 742, the hand wheel block 741 is fixedly arranged on the hand wheel 71, a moving cavity 7411 is arranged in the hand wheel block 741, the moving block 742 is arranged in the moving cavity 7411, the moving block 742 is provided with an extending part 7421 extending out of the hand wheel block 741, the extending part 7421 is provided with an extending inclined surface 7422 with the cross-sectional area gradually increasing along the vertical upward direction, a locking spring 743 for resetting the extending part 7421 out of the moving cavity 7411 is arranged between the other side of the moving block 742 opposite to the extending part 7421 and the inside of the hand wheel block 741, the locking piece 721 comprises a locking block 7211, the locking block 7211 is arranged on the locking rod 72 and is vertical to the extending rod 711, the locking block 7211 is provided with a locking groove 7212 matched with the size of the extending part 7421, when the locking linkage 74 and the locking piece 721 are in a locking state, the locking rod 72 is vertical to the extending rod 711, when the locking rod 72 is required to be fixed on the hand wheel 71, that is, when the valve plug 2 needs to be driven by the handwheel 71 to rotate, the locking rod 72 is rotated, so that the locking rod 72 rotates around the hinge point with the extension rod 711, the locking block 7211 gradually approaches the extension portion 7421, and because the extension portion 7421 has the extension inclined surface 7422, when the locking block 7211 is in contact with the extension slope 7422, the extension 7421 is gradually pushed into the moving chamber 7411 until the locking groove 7212 is opposite to the extension 7421, the extension 7421 enters the locking groove 7212 by the driving of the locking spring 743, the locking rod 72 is perpendicular to the extension rod 711, i.e., parallel to the hand wheel 71, the hand wheel 71 can be driven to rotate at this time, and when the hand wheel 71 is not required to rotate, when the extension 7421 is pressed to completely enter the moving chamber 7411, the locking lever 72 moves the locking block 7211 away from the hand wheel block 741 by the return spring 76, and the locking block 7211 moves the moving block 742 to achieve a locking effect.

The hand wheel block 741 is provided with a moving groove 7412 arranged along the moving direction of the moving block 742, the moving groove 7412 extends to be communicated with the moving cavity 7411, the moving block 742 is provided with a control block 7423, the control block 7423 extends to the outside of the hand wheel block 741 through the moving groove 7412, when the moving block 742 needs to be controlled to move, the control block 7423 can be driven to drive the moving block 742, the extending portion 7421 does not need to be directly pressed, and the operation is convenient and fast.

A hand wheel driving rod 77 used for controlling the hand wheel 71 to rotate is arranged above the hand wheel block 741, an operator can drive the hand wheel 71 through the hand wheel driving rod 77, operation is convenient, and the hand wheel driving rod 77 is arranged on the hand wheel block 741 to apply force more directly.

Including gear train 4, case 2 is provided with extension axle 21, be provided with drive chamber 15 in the valve body 1 and extend axle 21 and output shaft 31 and extend to in the drive chamber 15, gear train 4 sets up in the drive chamber 15 and is located extension axle 21 and output shaft 31, gear train 4 constitutes the transmission cooperation of output shaft 31 and extension axle 21, output shaft 31 drives extension axle 21 through gear train 4 and rotates, thereby drive case 2 and rotate, finally play the purpose of opening and closing the ball valve, in the prior art, connect output shaft 31 and extension axle 21 through the valve rod, need extra support to carry out the spacing of concentricity to the valve rod, and the deformation of valve rod appears easily in longer valve rod, twist, cause the damage of valve rod, lead to need to change the valve rod, thereby increased maintenance personal's work burden, but this scheme adopts gear train 4 transmission, need not to guarantee the concentricity between extension axle 21 and the output shaft 31, the use of a valve rod and a support is omitted, the cost is reduced, and the occupied volume of the whole ball valve is smaller and the whole ball valve is more attractive without the valve rod.

The gear set 4 includes a driving gear 41 and a driven gear 42, the driven gear 42 is disposed on the extension shaft 21 and rotates synchronously with the extension shaft 21, the driving gear 41 is disposed on the output shaft 31 and rotates synchronously with the output shaft 31, the driving gear 41 is engaged with the driven gear 42, the diameter of the driving gear 41 is smaller than that of the driven gear 42, an operator drives the driving gear 41 to rotate through the output shaft 31, so as to drive the driven gear 42 to rotate, and the diameter of the driving gear 41 is smaller than that of the driven gear 42, that is, the operator can drive the valve body 2 with a smaller torque, thereby reducing the instantaneous torque output of the operator.

The valve body 1 is provided with an observation hole 22 opposite to the extension shaft 21, the extension shaft 21 is provided with a rotating block 23 which rotates synchronously with the valve core 2, the rotating block 23 penetrates through the observation hole 22, the rotating block 23 is in a ninety-degree arc shape, the observation hole 22 is transversely provided with a limiting block 24, when the valve core 2 is in an opening state, one side of the rotating block 23 abuts against the limiting block 24, when the valve core 2 is in a closing state, the other side of the rotating block 23 abuts against the limiting block 24, when the valve core 2 rotates, the extension shaft 21 rotates synchronously, the rotating block 23 positioned on the extension shaft 21 rotates simultaneously, when the valve core 2 is completely opened, one side of the rotating block 23 abuts against one end of the limiting block 24, and when the valve core 2 is gradually closed, the rotating block 23 rotates until the valve core 2 is completely closed, the other side of the rotating block 23 will abut against the other end of the limiting block 24, namely, the rotating block 23 can only rotate at the observation hole 22 between the two ends of the limiting block 24, the purpose of limiting the valve core 2 is achieved, and the valve core 2 is prevented from being excessively opened and closed to cause functional damage.

Including disk seat 5, be provided with the seat recess 11 with disk seat 5 looks adaptation in the valve body 1, disk seat 5 sets up in seat recess 11 and constitutes sealed cooperation with case 2, have between seat recess 11 bottom and the disk seat 5 and promote space 12, when case 2 closed, medium case 2 blocks to 6 one end of runner and can't flow to the other end of runner 6, the runner 6 one side pressure that case 2 blocked at this moment increases gradually for partial medium flow direction promotes space 12, thereby to disk seat 5 to the effort of the direction that case 2 was located, make the contact between disk seat 5 and the case 2 inseparabler.

Valve seat 5 is the tertiary echelonment that is close to seat recess 11 thickness reduction, valve seat 5 includes one-level ladder 51, second grade ladder 52 and tertiary ladder 53, it is located between seat recess 11 bottom and one-level ladder 51 to promote space 12, one-level ladder 51 is provided with the piston ring 54 that is the H form with seat recess 11 lateral wall, be provided with large-scale O type circle 55 between piston ring 54 and the valve seat 5, be provided with small-size O type circle 56 between piston ring 54 and the valve seat 5, tertiary ladder 53 lateral wall is provided with elastic hole 57, valve seat 5 is tertiary ladder 53 form, when making and closing the ball valve, the medium flow direction promotes in the space 12, thereby promote piston ring 54, and then it is inseparabler to drive whole valve seat 5 and the contact of case 2, improve the leakproofness of valve seat 5 and case 2.

The valve seat 5 has a contact portion 58 that is in sealing engagement with the valve element 2, and a seal ring 59 that is fitted to the valve element 2 is provided in the contact portion.