A ball valve with a drive motor and a metering device

Abstract

An embodiment of the present invention discloses a ball valve with a driving motor and a metering device, which relates to the technical field of valves and is invented to simplify the structure for determining that the sphere rotates in place. The ball valve includes a valve body and a motor, and the motor is arranged outside the valve body; a sphere is arranged inside the valve body, the sphere is connected to the first end of the valve stem, the second end of the valve stem is located outside the valve body and is connected to a sector gear, and the sector gear meshes with a driving gear; a speed reduction mechanism is connected between the motor and the driving gear; a reset mechanism for the sector gear is arranged outside the valve body; when the motor rotates, the driving gear is driven to rotate through the speed reduction mechanism, after the driving gear drives the sector gear to rotate a predetermined stroke, the teeth on the sector gear disengage from the teeth on the driving gear, and the reset mechanism resets the sector gear, and a tooth engagement action occurs between the sector gear and the driving gear. This application is applicable to occasions of shutting off and conducting media such as natural gas and water.

Description

Technical Field

[0001] This application relates to the technical field of valves, and particularly to a ball valve with a driving motor and a metering device. Background Art

[0002] In the gas meter industry, the entry or cut-off of gas is achieved through a valve. The opening or closing of the valve is achieved through a signal. In the existing ball valve, the rotation of the ball to the in-place position is fed back by a travel switch or a Hall sensor. This installation structure for determining the in-place rotation of the ball is relatively complex and not conducive to installation. Summary of the Invention

[0003] In view of this, the embodiments of this application provide a ball valve with a driving motor and a metering device, making the structure for determining the in-place rotation of the ball simple.

[0004] In a first aspect, the embodiments of this application provide a ball valve with a driving motor, including a valve body and a motor, the motor being disposed outside the valve body; a ball is disposed inside the valve body, the ball is connected to the first end of a valve stem, the second end of the valve stem is located outside the valve body and is connected to a sector gear, the sector gear meshes with a driving gear; a speed reduction mechanism is connected between the motor and the driving gear; a reset mechanism for the sector gear is disposed outside the valve body; when the motor rotates, the driving gear is driven to rotate through the speed reduction mechanism, after the driving gear drives the sector gear to rotate a predetermined stroke, the teeth on the sector gear disengage from the teeth on the driving gear, and the reset mechanism resets the sector gear, and a tooth hitting action occurs between the sector gear and the driving gear.

[0005] According to a specific implementation manner of an embodiment of this application, the reset mechanism includes an elastic member, the elastic member is disposed at a predetermined position within the rotation range of the sector gear, or is disposed at at least one end of the sector gear; or,

[0006] the reset mechanism includes a torsion spring, the torsion spring is disposed between the sector gear and the valve body and is sleeved on the second end of the valve stem, one end of the torsion spring is connected to the sector gear, and the other end is connected to the valve body; or,

[0007] the reset mechanism includes a first elastic member and a second elastic member; one ends of the first elastic member and the second elastic member are respectively connected to the sector gear, and the other ends are respectively connected to the valve body; the first elastic member and the second elastic member are symmetrically arranged around the second end of the valve stem; or,

[0008] The reset mechanism includes an elastic arm, a first column, and a second column; the first column and the second column are arranged outside the valve body, and a predetermined distance is provided between the two; a first end of the elastic arm is fixed on the sector gear or fixed on a second end of the valve stem, and a second end of the elastic arm is located between the first column and the second column.

[0009] According to a specific implementation manner of Embodiment 1 of the present application, the elastic member is arranged at a predetermined position within the rotation range of the sector gear; the elastic sheet is a metal elastic sheet, including a sheet-shaped base portion, a first end of the base portion having a first elastic portion for elastically abutting against a first end of the sector gear, and a second end of the base portion having a second elastic portion for elastically abutting against a second end of the sector gear; an outer side of the valve body is connected to a cavity, the sector gear is arranged within the cavity, and the base portion of the elastic sheet is clamped at an inner wall of the cavity.

[0010] According to a specific implementation manner of Embodiment 1 of the present application, the first elastic portion includes a first base connection portion, a first bending portion, and a second bending portion; the first base connection portion is connected to the first end of the base portion and extends from the first end of the base portion toward the sector gear; the first bending portion is connected to the first base connection portion and extends toward an outer side direction of the first base connection portion; the second bending portion is connected to the first bending portion, and the second bending portion is used for elastically abutting against the first end of the sector gear; the second elastic portion includes a second base connection portion, a third bending portion, and a fourth bending portion; the second base connection portion is connected to the second end of the base portion and extends from the second end of the base portion toward the sector gear; the third bending portion is connected to the second base connection portion and extends toward an outer side direction of the second base connection portion; the fourth bending portion is connected to the third bending portion, and the fourth bending portion is used for elastically abutting against the first end of the sector gear.

[0011] According to a specific implementation manner of Embodiment 1 of the present application, the second bending portion and the fourth bending portion respectively have arc surfaces.

[0012] According to a specific implementation manner of Embodiment 1 of the present application, a first positioning column and a second positioning column are arranged in parallel at a position within the cavity and close to the inner wall of the cavity; the elastic sheet is clamped between the first positioning column, the second positioning column, and the inner wall of the cavity, wherein the first positioning column is clamped at a position of the first end of the base portion, and the second positioning column is provided at a position of the second end of the base portion.

[0013] According to a specific implementation manner of Embodiment 1 of the present application, the elastic member is provided at a predetermined position within the rotation range of the sector gear; the sector gear includes a bushing and a sector disk body connected to the bushing, and the outer edge of the sector disk body has teeth for meshing with the teeth of the driving wheel; the bushing is sleeved on the second end of the valve stem; the first end of the sector disk body has a first arm body for elastically abutting against the elastic member, and the second end has a second arm body for elastically abutting against the elastic member.

[0014] According to a specific implementation manner of Embodiment 1 of the present application, a first bump is provided at the end of the first arm body, and a second bump is provided at the end of the second arm body.

[0015] According to a specific implementation manner of Embodiment 1 of the present application, the elastic member is provided at both ends of the sector gear, and the elastic member includes a first elastic member and a second elastic member; the sector gear includes a bushing and a sector disk body connected to the bushing, and the outer edge of the sector disk body has teeth for meshing with the teeth of the driving wheel; the bushing is sleeved on the second end of the valve stem; the first end of the sector disk body has a first arm body, and the second end has a second arm body; the first elastic member is provided at the end of the first arm body, and the second elastic member is provided at the end of the second arm body.

[0016] In a second aspect, an embodiment of the present invention further provides a metering device, including a ball valve as described in any one of the foregoing implementation manners installed on the metering device.

[0017] In an embodiment of the present application, when the motor rotates, the driving gear is driven to rotate by the reduction mechanism. After the driving gear drives the sector gear to rotate a predetermined stroke, the teeth on the sector gear disengage from the teeth on the driving gear, and the reset mechanism resets the sector gear, and a tooth hitting action occurs between the sector gear and the driving gear. According to whether the tooth hitting action occurs, it can be determined whether the sphere rotates in place, and the structure is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic partial structure diagram of a ball valve with a driving motor according to an embodiment of the present application;

[0020] Figure 2 It is an exploded structure diagram of a ball valve with a driving motor according to an embodiment of the present application;

[0021] Figure 3 For Figure 1 and Figure 2 the three-dimensional structural schematic diagram of the driving gear in

[0022] Figure 4 For Figure 1 and Figure 2 the three-dimensional structural schematic diagram of the elastic member in

[0023] Figure 5 For Figure 1 and Figure 2 the three-dimensional structural schematic diagram of the sector gear in Specific embodiments

[0024] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0025] The embodiments of the present application aim to provide a ball valve with a driving motor, including a valve body and a motor, the motor is arranged outside the valve body; a sphere is arranged inside the valve body, the sphere is connected to the first end of the valve stem, the second end of the valve stem extends outside the valve body and is connected to a sector gear, the sector gear meshes with a driving gear; a speed reduction mechanism is connected between the motor and the driving gear; a reset mechanism of the sector gear is arranged outside the valve body; when the motor rotates, the driving gear is driven to rotate through the speed reduction mechanism, after the driving gear drives the sector gear to rotate a predetermined stroke, the teeth on the sector gear disengage from the teeth on the driving gear, and the reset mechanism resets the sector gear, and a tooth hitting action occurs between the sector gear and the driving gear. According to whether the tooth hitting action occurs, it can be determined whether the sphere rotates in place, and the structure is simple.

[0026] Refer to Figure 1 and Figure 2, the ball valve with a driving motor in this embodiment includes a valve body 10 and a motor 12, and the motor 12 is arranged outside the valve body 10; a sphere (not shown in the figure) is arranged inside the valve body 10, the sphere is connected to the first end of the valve stem, the second end 14 of the valve stem is located outside the valve body 10 and is connected to a sector gear 16, and the sector gear 16 meshes with a driving gear 18; a speed reduction mechanism 20 is connected between the motor 12 and the driving gear 18; outside the valve body 10, an elastic member 22 is arranged at a predetermined position within the rotation range of the sector gear 16; when the motor 12 rotates, the driving gear 18 is driven to rotate through the speed reduction mechanism 20, and after the driving gear 18 drives the sector gear 16 to rotate a predetermined stroke, the teeth on the sector gear 16 disengage from the teeth on the driving gear 18, and a reset mechanism resets the sector gear 16, and a tooth hitting action occurs between the sector gear 16 and the driving gear 18.

[0027] For example, when the motor 12 rotates forward, the driving gear 18 is driven to rotate through the speed reduction mechanism 20, and after the driving gear 18 drives the sector gear 16 to rotate a predetermined stroke (the valve opens) in the first direction (such as the clockwise direction), the tooth 16a on the sector gear 16 disengages from the tooth on the driving gear 18, and the elastic member 22 resets the sector gear 16, and a tooth hitting action occurs between the sector gear 16 and the driving gear 18. That is, when the driving gear drives the sector gear to rotate past the missing tooth on the sector gear, gear slippage, i.e., tooth hitting, occurs. At this time, the sector gear continuously presses against the elastic member under the rotation of the driving gear.

[0028] When the motor 12 rotates in the reverse direction, the driving gear 18 is driven to rotate through the speed reduction mechanism 20, and after the driving gear 18 drives the sector gear 16 to rotate a predetermined stroke (the valve closes) in the second direction (such as the counterclockwise direction), the tooth 16b on the sector gear 16 disengages from the tooth on the driving gear 18, and the elastic member 22 resets the sector gear 16, and a tooth hitting action occurs between the sector gear 16 and the driving gear 18.

[0029] In other words, when the motor 12 rotates in the reverse direction, under the action of the restoring force of the elastic member 22, the smooth meshing of the driving gear and the sector gear is achieved, thereby realizing a smooth reverse rotation. The driving gear drives the full teeth on the sector gear to rotate, and when it rotates to a certain position (the valve closed position), the same tooth hitting occurs.

[0030] After the sector gear 16 rotates along a predetermined stroke, it can elastically abut against the elastic member 22, so that the sector gear 16 is subjected to an elastic restoring force. Under the combined action of the driving force of the motor 12 and the elastic restoring force, a tooth beating action (also known as a tooth beating phenomenon) will occur between the driving gear 18 and the sector gear 16. That is to say, when the driving gear drives the sector gear to rotate past the missing teeth on the sector gear, gear slippage, i.e., tooth beating, occurs. At this time, the sector gear continuously abuts against the elastic member under the rotation of the driving gear. Briefly speaking, the in-place tooth beating structure in this embodiment causes the gear to rotate and beat due to the missing teeth on the sector gear. According to whether the tooth beating action occurs, it can be determined whether the sphere rotates in place, and the structure is simple.

[0031] In addition, in this embodiment, after the sphere rotates in place, a tooth beating phenomenon will occur between the driving gear and the sector gear, which can reduce or prevent the situation that the driving gear and the sector gear are damaged due to excessive force.

[0032] When the tooth beating action occurs, since the load at the output end of the motor 12 changes regularly, the control current for controlling the opening or closing action of the ball valve will also change regularly. Therefore, in one embodiment, it is possible to determine whether the valve is opened or closed by detecting the change in the magnitude of the control current. In specific applications, the control current can be sampled and detected. When it is detected that the control current changes regularly, it can be determined that the sphere has rotated in place. Correspondingly, the control device for controlling the opening or closing action of the ball valve may include a current sampling circuit for sampling the control current. In one embodiment, it is possible to detect the continuous regular change of the current through a program and determine that the valve opening or closing has reached the in-place state.

[0033] Among them, the valve body 10 has a fluid inlet and a fluid outlet, and the sphere has a fluid passage inside. When the sector gear 16 rotates, it drives the sphere to rotate through the valve stem, and the opening or closing of the valve is realized by the conduction or cut-off of the fluid passage in the sphere and the fluid inlet and outlet on the valve body 10.

[0034] The reduction mechanism 20 between the motor 12 and the driving gear 18 can be a gear reduction mechanism. Refer to Figure 3 , the driving gear 18 can be a double gear. One of the gears 180 of the double gear meshes with the gear at the output end of the reduction mechanism, and the other gear 182 meshes with the sector gear 16. Using a double gear can make the layout of the positions between the sector gear 16 and the reduction mechanism 20 more compact.

[0035] The elastic member 22 can be a metal elastic sheet to maintain a large and lasting elastic force. Refer to Figure 4, in one example, the metal elastic sheet may include a sheet-shaped base portion 220. The first end of the base portion 220 has a first elastic portion 222 for elastically abutting against the first end of the sector gear 16, and the second end of the base portion 220 has a second elastic portion 224 for elastically abutting against the second end of the sector gear 16. A cavity 24 may be connected to the outside of the valve body 10. The sector gear 16 is disposed in the cavity 24, and the base portion 220 of the elastic sheet may be clamped at the inner wall of the cavity 24. By elastically abutting the two ends of the sector gear 16 against different elastic portions respectively to achieve the tooth beating action, the size of the sector gear 16 can be reduced.

[0036] Wherein, the cavity 24 is used to install the sector gear 16, the reduction mechanism 20, etc. The cross-sectional shape of the cavity 24 may be square. The sector gear 16 is installed at the center position of the cavity 24, and the driving gear 18 meshing with the sector gear 16 is located at a corner of the cavity 24. That is to say, the connection line between the installation position of the driving gear 18 and the installation position of the sector gear 16 is on the diagonal line in the cavity 24, so that the internal space of the cavity 24 can be fully utilized, and the overall external dimension of the cavity 24 can be relatively small.

[0037] The cavity 24 and the valve body 10 may be an integral structure. The cavity 24 has an opening, and a flange is provided at the opening. The motor 12 can be installed on the cavity 24 through the flange.

[0038] See Figure 4 , the first elastic portion 222 may include a first base connection portion A1, a first bending portion A2, and a second bending portion A3. The first base connection portion A1 is connected to the first end of the base portion 220 and extends from the first end of the base portion 220 toward the sector gear 16; the first bending portion A2 is connected to the first base connection portion A1 and extends toward the outside of the first base connection portion A1; the second bending portion A3 is connected to the first bending portion A2, and the second bending portion A3 is used for elastically abutting against the first end of the sector gear 16.

[0039] The first base connection portion A1 extends from the first end of the base portion 220 toward the sector gear 16, which can make the first bending portion A2 and the second bending portion A3 have a larger activity space, a greater elastic restoring force, and a better tooth beating effect.

[0040] The first bending portion A2 between the second bending portion A3 and the first base connection portion A1 itself also has elasticity, which can make the first bending portion A2 have a larger activity space and enhance the elastic restoring force of the second bending portion A3.

[0041] Accordingly, the second elastic part 224 includes a second base connecting part B1, a third bending part B2, and a fourth bending part B3; the second base connecting part B1 is connected to the second end of the base part 220 and extends from the second end of the base part 220 toward the sector gear 16; the third bending part B2 is connected to the second base connecting part B1 and extends toward the outer side direction of the second base connecting part B1; the fourth bending part B3 is connected to the third bending part B2, and the fourth bending part B3 is used for elastically abutting against the first end of the sector gear 16.

[0042] Similarly, the second base connecting part B1 extends from the second end of the base part 220 toward the sector gear 16, which can enable the third bending part B2 and the fourth bending part B3 to have a larger activity space, a greater elastic restoring force, and a better tooth beating effect.

[0043] The third bending part B2 between the fourth bending part B3 and the first base connecting part A1 itself also has elasticity, which can enable the fourth bending part B3 to have a larger activity space and enhance the elastic restoring force of the fourth bending part B3.

[0044] The second bending part A3 and the fourth bending part B3 may respectively have arc surfaces, which can reduce the contact area with the end part of the sector gear 16 to increase the elastic force applied by the second bending part A3 and the fourth bending part B3 to the sector gear 16.

[0045] A first positioning post 26 and a second positioning post 28 may be arranged in parallel at a position in the cavity 24 close to the inner wall of the cavity 24; the elastic sheet is clamped between the first positioning post 26, the second positioning post 28, and the inner wall of the cavity 24, wherein the first positioning post 26 is clamped at the first end position of the base part 220, and the second positioning post 28 is provided at the second end position of the base part 220.

[0046] The clamping positions of the first positioning post 26 and the second positioning post 28 on the elastic sheet can, on the one hand, limit the elastic sheet, and on the other hand, enable the second bending part A3 and the fourth bending part B3 to have a larger activity space, which can enhance the elastic restoring force of the second bending part A3 and the fourth bending part B3.

[0047] The base part 220 can be abutted against the inner wall of the cavity 24. The inner wall of the cavity 24 can provide stable support for the base part 220 and can also correspondingly enhance the elastic restoring force of the second bending part A3 and the fourth bending part B3.

[0048] See Figure 5, in one example, the sector gear 16 includes a bushing 160, a sector disk body 162 connected to the bushing 160, and the outer edge of the sector disk body 162 has teeth 164 for meshing with the teeth of the driving wheel; the bushing 160 is sleeved on the second end 14 of the valve stem; the first end of the sector disk body 162 has a first arm body 166 for elastically abutting against the elastic member 22, and the second end has a second arm body 168 for elastically abutting against the elastic member 22.

[0049] By respectively forming the two ends of the sector gear 16 in the form of arm bodies and elastically abutting against the elastic member 22 through the arm bodies, the size of the disk body of the sector gear 16 can be effectively reduced, the weight of the sector gear 16 can be reduced, and its rotation can be made more flexible and lighter.

[0050] The material of the sector gear 16 can be plastic, and the sector gear 16 can be formed by an injection molding process. The material of the sector gear 16 can also be metal or alloy and other materials.

[0051] At the end of the first arm body 166, there may be a first bump 170, and the first bump 170 elastically abuts against the elastic member 22. At the end of the second arm body 168, there may be a second bump 172, and the second bump 172 elastically abuts against the elastic member 22. In this way, the force on the sector gear 16 can be made stable, and the tooth striking action can have a stronger rhythm.

[0052] The embodiment of the present invention also provides a ball valve with a driving motor 12. The structure of this embodiment is basically the same as that of the Figure 1 embodiment shown, except that in this embodiment, the elastic member 22 is provided at at least one end of the sector gear 16.

[0053] In one example, the sector gear 16 includes a bushing 160, a sector disk body 162 connected to the bushing 160, and the outer edge of the sector disk body 162 has teeth for meshing with the teeth of the driving wheel; the bushing 160 is sleeved on the second end 14 of the valve stem; the first end of the sector disk body 162 has a first arm body 166 for elastically abutting against the elastic member, and the second end has a second arm body 168 for elastically abutting against the elastic member; at the end of the first arm body 166, there is a first elastic member, and at the end of the second arm body 168, there is a second elastic member. Among them, the first elastic member and the second elastic piece can be metal elastic pieces or springs, etc.

[0054] When the motor 12 rotates forward, it drives the driving gear 18 to rotate through the speed reduction mechanism 20. After the driving gear 18 drives the sector gear 16 to rotate a predetermined stroke (the valve is opened) in the first direction (such as the valve opening direction), the teeth on the sector gear 16 disengage from the teeth on the driving gear 18. The first elastic member on the first arm body 166 of the sector disk body 162 can abut against the first stop block provided outside the valve body 10, and the first elastic member resets the sector gear 16, and a tooth striking action occurs between the sector gear 16 and the driving gear 18.

[0055] The motor 12 rotates in the reverse direction, drives the driving gear 18 to rotate through the speed reduction mechanism 20. After the driving gear 18 drives the sector gear 16 to rotate a predetermined stroke (valve closing) in the second direction (such as the valve closing direction), the teeth on the sector gear 16 disengage from the teeth on the driving gear 18. The second elastic member on the second arm 168 of the sector disk body 162 can abut against the second stopper provided outside the valve body 10. The second elastic member resets the sector gear 16, and a tooth hitting action occurs between the sector gear 16 and the driving gear 18. According to whether the tooth hitting action occurs, it can be determined whether the sphere rotates in place, and the structure is simple.

[0056] The embodiment of the present invention further provides a ball valve with a driving motor. The structure of this embodiment is Figure 1 basically the same as the structure of the embodiment shown. The difference is that in this embodiment, the reset mechanism includes a torsion spring. The torsion spring is arranged between the sector gear 16 and the valve body 10 and sleeved on the second end 14 of the valve stem. One end of the torsion spring is connected to the sector gear 16, and the other end is connected to the valve body 10.

[0057] When the motor 12 rotates in the forward direction, drives the driving gear 18 to rotate through the speed reduction mechanism 20. After the driving gear 18 drives the sector gear 16 to rotate a predetermined stroke (valve opening) in the first direction (such as the valve opening direction), the torsion spring generates a compressive deformation. The teeth on the sector gear 16 disengage from the teeth on the driving gear 18. The torsion spring resets the sector gear 16, and a tooth hitting action occurs between the sector gear 16 and the driving gear 18.

[0058] When the motor 12 rotates in the reverse direction, drives the driving gear 18 to rotate through the speed reduction mechanism 20. After the driving gear 18 drives the sector gear 16 to rotate a predetermined stroke (valve closing) in the second direction (such as the valve closing direction), the torsion spring generates a tensile deformation. The teeth on the sector gear 16 disengage from the teeth on the driving gear 18. The torsion spring resets the sector gear 16, and a tooth hitting action occurs between the sector gear 16 and the driving gear 18. According to whether the tooth hitting action occurs, it can be determined whether the sphere rotates in place, and the structure is simple. In addition, in this embodiment, the torsion spring is arranged between the sector gear 16 and the valve body 10, and can be hidden under the sector gear 16, and the structure is more simple and compact.

[0059] The embodiment of the present invention further provides a ball valve with a driving motor. The structure of this embodiment is Figure 1 basically the same as the structure of the embodiment shown. The difference is that in this embodiment, the reset mechanism includes a first elastic member and a second elastic member; one ends of the first elastic member and the second elastic member are respectively connected to the sector gear 16, and the other ends are respectively connected to the valve body 10; the first elastic member and the second elastic member are symmetrically arranged around the second end 14 of the valve stem so as to respectively apply two opposite elastic restoring forces to the sector gear 16.

[0060] In one example, the first elastic member and the second elastic member are extension springs respectively. In another example, the first elastic member and the second elastic member are elastic rubber bands or elastic rubber strips respectively.

[0061] When the motor 12 rotates forward, it drives the driving gear 18 to rotate through the speed reduction mechanism 20. After the driving gear 18 drives the sector gear 16 to rotate a predetermined stroke (the valve is opened) in the first direction (such as the valve opening direction), the first elastic member generates a tensile deformation, the teeth on the sector gear 16 disengage from the teeth on the driving gear 18, the first elastic member resets the sector gear 16, and a tooth hitting action occurs between the sector gear 16 and the driving gear 18.

[0062] When the motor 12 rotates reversely, it drives the driving gear 18 to rotate through the speed reduction mechanism 20. After the driving gear 18 drives the sector gear 16 to rotate a predetermined stroke (the valve is closed) in the second direction (such as the valve closing direction), the second elastic member generates a tensile deformation, the teeth on the sector gear 16 disengage from the teeth on the driving gear 18, the second elastic member resets the sector gear 16, and a tooth hitting action occurs between the sector gear 16 and the driving gear 18. According to whether the tooth hitting action occurs, it can be determined whether the sphere rotates in place, and the structure is simple.

[0063] In addition, in this embodiment, the first elastic member and the second elastic member can also be provided between the sector gear 16 and the valve body 10, that is, hidden under the sector gear 16, and the structure is simpler and more compact.

[0064] The embodiment of the present invention also provides a ball valve with a driving motor. The structure of this embodiment is basically the same as that of the Figure 1 shown embodiment. The difference is that in this embodiment, the reset mechanism includes an elastic arm, a first column and a second column; the first column and the second column are arranged outside the valve body 10, and there is a predetermined distance between them; the first end of the elastic arm is fixed on the sector gear 16 or fixed on the second end 14 of the valve stem, and the second end of the elastic arm is located between the first column and the second column. The elastic arm can also be called an elastic fork. In one example, the elastic arm is a steel bar or a steel wire.

[0065] When the motor 12 rotates forward, it drives the driving gear 18 to rotate through the speed reduction mechanism 20. After the driving gear 18 drives the sector gear 16 to rotate a predetermined stroke (the valve is opened) in the first direction (such as the valve opening direction), the elastic arm is blocked by the first column and generates an elastic bending deformation, the teeth on the sector gear 16 disengage from the teeth on the driving gear 18, the elastic arm resets the sector gear 16, and a tooth hitting action occurs between the sector gear 16 and the driving gear 18.

[0066] The motor 12 rotates in the reverse direction, drives the driving gear 18 to rotate through the speed reduction mechanism 20. After the driving gear 18 drives the sector gear 16 to rotate a predetermined stroke (valve closed) in the second direction (such as the valve closing direction), the elastic arm is elastically bent and deformed by the obstruction of the second column. The teeth on the sector gear 16 are disengaged from the teeth on the driving gear 18. The elastic arm resets the sector gear 16, and a tooth hitting action occurs between the sector gear 16 and the driving gear 18. According to whether the tooth hitting action occurs, it can be determined whether the sphere rotates in place, and the structure is simple.

[0067] In this embodiment, the elastic arm, the first column and the second column can also be arranged between the sector gear 16 and the valve body 10, that is, hidden under the sector gear 16, and the structure is simpler and more compact.

[0068] The embodiment of the present invention also provides a metering device, on which the ball valve described in any one of the foregoing embodiments is installed. Its beneficial effects are the same as those of the foregoing embodiments and will not be elaborated herein. Among them, the metering device can be a gas meter or a water meter and other devices. In one example, the ball valve can be installed at the fluid inlet of the metering device.

[0069] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0070] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other, and the differences between each embodiment and other embodiments are emphasized.

[0071] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A ball valve with a drive motor, characterized in that, It includes a valve body and a motor, and the motor is arranged outside the valve body; A sphere is arranged inside the valve body. The sphere is connected to the first end of a valve stem. The second end of the valve stem is located outside the valve body and is connected to a sector gear. The sector gear meshes with a driving gear; A speed reduction mechanism is connected between the motor and the driving gear; A reset mechanism for the sector gear is arranged outside the valve body; When the motor rotates, the driving gear is driven to rotate through the speed reduction mechanism. After the driving gear drives the sector gear to rotate a predetermined stroke, the teeth on the sector gear disengage from the teeth on the driving gear, and the reset mechanism resets the sector gear, and a tooth impact action occurs between the sector gear and the driving gear; The reset mechanism includes an elastic member. The elastic member is arranged at a predetermined position within the rotation range of the sector gear. The sector gear includes a bushing and a sector disk body connected to the bushing. The first end of the sector disk body has a first arm body for elastically abutting against the elastic member, and the second end has a second arm body for elastically abutting against the elastic member; The elastic member is a metal elastic sheet, including a sheet-shaped base portion. The first end of the base portion has a first elastic portion for elastically abutting against the first end of the sector gear. The first elastic portion includes a first base connection portion, a first bending portion, and a second bending portion; The second end of the base portion has a second elastic portion for elastically abutting against the second end of the sector gear; A cavity is connected to the outside of the valve body, and the sector gear is arranged inside the cavity, and the base portion of the elastic sheet is clamped at the inner wall of the cavity; The reset mechanism includes an elastic arm, a first upright post, and a second upright post; The first upright post and the second upright post are arranged outside the valve body, and there is a predetermined distance between them; The first end of the elastic arm is fixed on the sector gear or fixed on the second end of the valve stem, and the second end of the elastic arm is located between the first upright post and the second upright post.

2. The ball valve according to claim 1, wherein The first base connection portion is connected to the first end of the base portion and extends from the first end of the base portion towards the sector gear; The first bending portion is connected to the first base connection portion and extends towards the outside of the first base connection portion; The second bending portion is connected to the first bending portion, and the second bending portion is used for elastically abutting against the first end of the sector gear; The second elastic portion includes a second base connection portion, a third bending portion, and a fourth bending portion; The second base connection portion is connected to the second end of the base portion and extends from the second end of the base portion towards the sector gear; The third bending portion is connected to the second base connection portion and extends towards the outside of the second base connection portion; The fourth bending portion is connected to the third bending portion, and the fourth bending portion is used for elastically abutting against the first end of the sector gear.

3. The ball valve according to claim 2, characterized in that, The second bending portion and the fourth bending portion respectively have arc surfaces.

4. The ball valve according to claim 2, wherein, A first positioning post and a second positioning post are arranged in parallel at a position close to the inner wall of the cavity inside the cavity; The elastic sheet is clamped between the first positioning post, the second positioning post and the inner wall of the cavity. Among them, the first positioning post is clamped at the first end position of the base part, and the second positioning post is arranged at the second end position of the base part.

5. The ball valve according to claim 1, wherein The outer edge of the sector disk body has teeth for meshing with the teeth of the driving wheel; The sleeve is sleeved on the second end of the valve stem.

6. The ball valve according to claim 5, characterized in that, A first bump is provided at the end of the first arm body, and a second bump is provided at the end of the second arm body.

7. A metering device, characterized in that, The ball valve according to any one of the preceding claims 1 to 6 is installed on the metering device.

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