Small-torque ball valve

Abstract

The invention discloses a small-torque ball valve. The small-torque ball valve comprises a valve body, a valve element and a driving part. A liquid conveying channel, a first pivoting space and a second pivoting space are defined by the valve body, and the first pivoting space is communicated with the liquid conveying channel and the second pivoting space; the valve element is installed in the first pivoting space in a pivoted mode and stretches into the liquid conveying channel, a plurality of transmission teeth are annularly arranged on the peripheral wall of the end, away from the liquid conveying channel, of the valve element, the transmission teeth are sequentially arranged in the circumferential direction of the valve element, and the valve element is used for opening or closing the liquid conveying channel; the driving part is pivotally mounted in the second pivoting space, a plurality of driving teeth are arranged on the peripheral wall of the driving part and are arranged at intervals in the axial direction of the driving part, the number of the transmission teeth is larger than that of the driving teeth, the driving teeth are in meshed connection with the transmission teeth, and the driving part is used for driving the valve element to rotate. By increasing the transmission ratio between the driving piece and the valve element, the valve element can be driven to rotate with small driving force, and therefore the starting torque for driving the ball valve can be reduced.

Description

Technical Field

[0001] This application relates to the field of ball valves, and particularly to a small-torque ball valve. Background Art

[0002] In the related art, ball valves are widely used in fluid pipelines for transporting liquids or gases. Ball valves are used to control the flow or cutoff of fluids in the pipeline. When the flow pressure of the fluid is high and the ball valve is opened, the fluid directly acts on the surface of the valve core. The impact force of the fluid generates a large thrust on the valve core, increasing the friction and resistance that need to be overcome when the valve core rotates. As a result, the starting torque of the ball valve increases, reducing the user experience of the ball valve. Summary of the Invention

[0003] In order to reduce the starting torque of the ball valve and improve the user experience of the ball valve, this application provides a small-torque ball valve.

[0004] The small-torque ball valve provided by this application adopts the following technical solutions: A small-torque ball valve, comprising: a valve body, the valve body defining an infusion channel, a first pivoting space, and a second pivoting space. The infusion channel forms a liquid inlet and a liquid outlet on the outer peripheral wall of the valve body. The first pivoting space is in communication with both the infusion channel and the second pivoting space.

[0005] A valve core, the valve core being pivotally installed in the first pivoting space and extending into the infusion channel. A plurality of transmission teeth are annularly provided on the outer peripheral wall of the end of the valve core away from the infusion channel. The plurality of transmission teeth are arranged in sequence along the circumferential direction of the valve core. The valve core is used to open or close the infusion channel.

[0006] A driving member, the driving member being pivotally installed in the second pivoting space. The driving member passes through the valve body and a driving handwheel is provided at the end. A plurality of driving teeth are provided on the outer peripheral wall of the driving member. The plurality of driving teeth are spaced apart along the axial direction of the driving member. The number of transmission teeth is greater than the number of driving teeth. The driving teeth are meshed with the transmission teeth. The driving handwheel is used to drive the driving member to rotate around the pivoting axis of the driving member. The driving member is used to drive the valve core to rotate around the pivoting axis of the valve core.

[0007] By adopting the above technical solution, by providing a plurality of driving teeth on the outer peripheral wall of the valve core and a plurality of driving teeth on the outer peripheral wall of the driving member, and the number of the driving teeth is greater than that of the driving teeth, the transmission ratio between the driving member and the valve core can be increased, so that the driving torque of the driving member on the valve core can be increased. Compared with the prior art, when the flow pressure of the fluid in the conveying channel is relatively high and the user opens the ball valve, by increasing the transmission ratio between the driving member and the valve core, the user can drive the valve core to rotate with a smaller driving force, thereby reducing the starting torque for the user to drive the ball valve, and further improving the user experience of using the ball valve.

[0008] Preferably, along the axial direction of the driving member, the driving member divides the second pivoting space into a rotating space and a driving space. The driving member is sealingly disposed in the rotating space. A driving blade group is provided on the outer peripheral wall of the driving member. The driving blade group is located in the driving space, and the driving teeth are located in the rotating space.

[0009] The small-torque ball valve further includes: a throttling mechanism. The valve body defines a first liquid channel and a second liquid channel. The first liquid channel is communicated between the liquid inlet and the driving space. The second liquid channel is communicated between the liquid outlet and the driving space. The driving blade group is opposite to the first liquid channel. The fluid in the first liquid channel drives the driving blade group to drive the driving member to rotate around the pivoting axis of the driving member. The throttling mechanism is disposed on the valve body, and the throttling mechanism is used to open or close the first liquid channel.

[0010] By adopting the above technical solution, by opening the first liquid channel through the throttling mechanism, the fluid at the liquid inlet enters the driving space through the first liquid channel. When the fluid in the first liquid channel enters the driving space, the fluid drives the driving blade group to drive the driving member to rotate, so that the driving force for the user to drive the valve core to rotate can be further reduced, and the fluid in the driving space enters the liquid outlet through the second liquid channel.

[0011] Preferably, both the driving space and the driving blade group are two. The two driving spaces and the driving blade groups are both spaced apart along the axial direction of the driving member. The rotating space is located between the two driving spaces, and the driving teeth are located between the two driving blade groups.

[0012] The valve body defines a third liquid channel, the first liquid channel is connected to one of the driving spaces, the second liquid channel is connected to another of the driving spaces, and the third liquid channel is connected between the two driving spaces. Along the radial direction of the driving member, the connecting point between the third liquid channel and one of the driving spaces is located on one side of the central axis of the driving member, and the connecting point between the third liquid channel and another of the driving spaces is located on the other side of the central axis of the driving member. The driving blade group in the driving space connected to the liquid outlet is opposite to the third liquid channel, and the fluid in the third liquid channel drives the corresponding driving blade group to drive the driving member to rotate around the pivot axis of the driving member.

[0013] By adopting the above technical solution, the fluid in the third liquid channel drives the corresponding driving blade group to drive the driving member to rotate, so as to further reduce the driving force of the user to drive the valve core to rotate, and the fluid in the driving space located on the left side of the rotation space enters the liquid outlet through the second liquid channel.

[0014] Preferably, a plurality of first seals are sleeved on the outer peripheral wall of the driving member, the plurality of first seals are spaced apart along the axial direction of the driving member, the plurality of driving teeth are located between any two adjacent first seals, and the first seals are clamped between the driving member and the inner wall of the rotating space.

[0015] By adopting the above technical solution, a plurality of first seals are arranged between the driving member and the inner wall of the rotating space. The first seals are used to prevent the liquid in the driving space from entering the rotating space, thereby preventing the driving teeth and the transmission teeth from being soaked by the fluid, thereby minimizing rust on the driving teeth and the transmission teeth, thereby increasing the service life of the driving member and the service life of the valve core.

[0016] Preferably, the valve body is provided with an intercepting hole, the intercepting hole is connected with the first liquid channel, and an angle is formed between the central axis of the intercepting hole and the central axis of the first liquid channel. The intercepting mechanism comprises an intercepting member and a limiting assembly, the intercepting member is slidably arranged in the intercepting hole along the axial direction of the intercepting hole, the outer peripheral wall of the intercepting member is provided with a mounting hole, the limiting assembly is arranged in the mounting hole, the inner peripheral wall of the intercepting hole is provided with at least one limiting hole, the limiting assembly is suitable for extending into the limiting hole to make the intercepting member cooperate with the valve body in limiting position, and the intercepting member is used to open or close the first liquid channel.

[0017] By adopting the above technical solution, when the shut-off member moves along the shut-off hole close to the first liquid channel and the shut-off member is completely opposite to the first liquid channel, the shut-off member closes the first liquid channel. After the ball valve is opened, the fluid in the infusion channel can be prevented from continuously impacting the drive blade group through the first liquid channel, thereby preventing the drive blade group from being damaged, thereby increasing the service life of the drive blade group.

[0018] Preferably, the limiting assembly includes a limiting member and an elastic member, the limiting member is suitable for extending into or moving out of the mounting hole, the elastic member is elastically deformably arranged between the limiting member and the bottom wall of the mounting hole, the partial structure of the limiting member extending out of the mounting hole is suitable for extending into or moving out of the limiting hole, and the limiting member is suitable for limiting cooperation with the limiting hole.

[0019] By adopting the above technical solution, when the limit member moves close to the limit hole and is opposite to the limit hole, the elastic member drives the limit member to extend into the limit hole, and the limit member and the inner peripheral wall of the limit hole stop and cooperate in limiting, thereby achieving the technical effect of the limiting cooperation between the shut-off member and the valve body.

[0020] Preferably, a limiting groove is provided on the inner peripheral wall of the first pivot space, and the limiting groove is arc-shaped. A limiting portion is provided on the outer peripheral wall of the valve core, and the limiting portion is movably arranged in the limiting groove. The limiting portion is suitable for abutting against the side wall of the limiting groove so that the valve core and the valve body are limitedly matched.

[0021] By adopting the above technical solution, when the valve core fully opens the infusion channel, the limit portion abuts against the right side wall of the limit groove, thereby preventing the valve core from rotating excessively and causing the infusion channel to not be fully opened, thereby improving the working reliability of the ball valve.

[0022] Preferably, a second sealing member is sandwiched between the valve core and the first pivoting space, and the second sealing member is sealed with the valve core and the valve body.

[0023] By adopting the above technical solution, a second sealing member is provided between the valve core and the inner wall of the rotating space, so that the fluid in the infusion channel can be prevented from entering the first pivot space and the second pivot space, and the driving teeth and the transmission teeth can be prevented from being soaked by the fluid, so that the driving teeth and the transmission teeth can be prevented from rusting as much as possible, thereby increasing the service life of the driving member and the service life of the valve core.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. By providing a plurality of transmission teeth on the outer peripheral wall of the valve core and a plurality of driving teeth on the outer peripheral wall of the driving member, and the number of transmission teeth being greater than the number of driving teeth, the transmission ratio between the driving member and the valve core can be increased, thereby increasing the driving torque of the driving member on the valve core. Compared with the prior art, when the flow pressure of the fluid in the conveying channel is high and the user opens the ball valve, by increasing the transmission ratio between the driving member and the valve core, the user can drive the valve core to rotate with a smaller driving force, thereby reducing the starting torque for the user to drive the ball valve, and further improving the user experience of using the ball valve; 2. By opening the first liquid channel through the throttling mechanism, the fluid at the liquid inlet enters the driving space through the first liquid channel. When the fluid in the first liquid channel enters the driving space, the fluid drives the driving blade group to drive the driving member to rotate, thereby further reducing the driving force for the user to drive the valve core to rotate, and the fluid in the driving space enters the liquid outlet through the second liquid channel; 3. The fluid in the third liquid channel drives the corresponding driving blade group to drive the driving member to rotate, so as to further reduce the driving force for the user to drive the valve core to rotate, and the fluid in the driving space located on the left side of the rotating space enters the liquid outlet through the second liquid channel. Description of the Drawings

[0025] Figure 1 is a schematic diagram of a small-torque ball valve according to an embodiment of the present application; Figure 2 is a cross-sectional view of a small-torque ball valve according to an embodiment of the present application; Figure 3 is a cross-sectional view of a small-torque ball valve from another angle according to an embodiment of the present application; Figure 4 is Figure 3 an enlarged schematic view of part A in Figure 5 is a cross-sectional view of a small-torque ball valve from another angle according to an embodiment of the present application; Figure 6 is a cross-sectional view of a small-torque ball valve from another angle according to an embodiment of the present application; Figure 7 is a cross-sectional view of a small-torque ball valve from another angle according to an embodiment of the present application; Figure 8 is a cross-sectional view of a small-torque ball valve from another angle according to an embodiment of the present application.

[0026] Description of the Reference Numerals: 100, small-torque ball valve; 1. Valve body; 11. Infusion channel; 111. Liquid inlet; 112. Liquid outlet; 12. First pivot space; 121. Limit groove; 13. Second pivot space; 131. Rotation space; 132. Driving space; 14. First liquid channel; 15. Second liquid channel; 16. Third liquid channel; 17. Shut-off hole; 171. Limit hole; 2. Valve core; 21. Transmission gear; 22. Limiting part; 23. Second seal; 24. Connecting rod; 25. Switch ball; 3. Driving member; 31. Driving handwheel; 32. Driving gear; 33. Driving blade group; 331. Driving blade; 34. First seal; 4. Shut-off mechanism; 41. Shut-off member; 411. Mounting hole; 42. Limiting assembly; 421. Limiting member; 422. Elastic member. Detailed implementation mode

[0027] The following is a further detailed description of the present application in conjunction with the attached Figures 1 - 8 drawings.

[0028] The embodiment of the present application discloses a small-torque ball valve 100.

[0029] Referring to Figure 1 , Figure 2 and Figure 8 , the small-torque ball valve 100 according to the embodiment of the present application includes: a valve body 1, a valve core 2 and a driving member 3. The valve body 1 defines an infusion channel 11, a first pivot space 12 and a second pivot space 13. The infusion channel 11 extends along the first direction of the valve body 1. The infusion channel 11 forms a liquid inlet 111 and a liquid outlet 112 on the outer peripheral wall of the valve body 1. Specifically, along the first direction of the valve body 1, the infusion channel 11 forms a liquid inlet 111 on the right side wall of the valve body 1, and the infusion channel 11 forms a liquid outlet 112 on the left side wall of the valve body 1. The first direction of the valve body 1 may refer to Figure 2 the left-right direction in

[0030] . And, the first pivot space 12 is communicated with both the infusion channel 11 and the second pivot space 13. Specifically, along the height direction of the valve body 1, both the first pivot space 12 and the second pivot space 13 are located above the infusion channel 11. The open opening below the first pivot space 12 is communicated with the infusion channel 11, and the open opening above the first pivot space 12 is communicated with the second pivot space 13. The height direction of the valve body 1 may refer to Figure 3 the up-down direction in

[0031] The valve core 2 is pivotally installed in the first pivot space 12, and the lower end of the valve core 2 extends into the infusion channel 11. The valve core 2 is sealingly arranged in the first pivot space 12. A plurality of transmission teeth 21 are annularly arranged on the outer peripheral wall of the end of the valve core 2 away from the infusion channel 11. That is to say, a plurality of transmission teeth 21 are annularly arranged on the outer peripheral wall of the upper end of the valve core 2. The plurality of transmission teeth 21 are arranged in sequence along the circumferential direction of the valve core 2. The valve core 2 is used to open or close the infusion channel 11.

[0032] The driving member 3 is pivotally installed in the second pivot space 13. The left end or the right end of the driving member 3 penetrates through the valve body 1, and a driving handwheel 31 is arranged at the end of the driving member 3 penetrating through the valve body 1. A plurality of driving teeth 32 are arranged on the outer peripheral wall of the driving member 3. The plurality of driving teeth 32 are arranged at intervals along the axial direction of the driving member 3. The driving teeth 32 are meshed with the transmission teeth 21. The driving handwheel 31 is used to drive the driving member 3 to rotate around the pivot axis between the driving member 3 and the valve body 1. The driving member 3 is used to drive the valve core 2 to rotate around the pivot axis between the valve core 2 and the valve body 1. Specifically, the user drives the driving member 3 to rotate through the driving handwheel 31, and the driving member 3 drives the valve core 2 to rotate through the driving teeth 32 and the transmission teeth 21.

[0033] Moreover, the number of the transmission teeth 21 is greater than the number of the driving teeth 32. According to the transmission ratio calculation formula: i = Z 2 Z 1 wherein, i is the transmission ratio between the driving member 3 and the valve core 2, Z 1 is the number of the driving teeth 32, and Z 2 is the number of the transmission teeth 21.

[0034] In some specific embodiments, when the number of the transmission teeth 21 is 40 and the number of the driving teeth 32 is 5, the transmission ratio between the driving member 3 and the valve core 2 is 8. Therefore, the transmission ratio between the driving member 3 and the valve core 2 is a positive integer.

[0035] According to the output torque calculation formula: T 1 = T 2 ×i wherein, T 1 is the output torque of the valve core 2, T 2 is the input torque of the driving member 3, and i is the transmission ratio.

[0036] When the input torque of the driving member 3 is a constant value, the greater the transmission ratio between the driving member 3 and the valve core 2, the greater the output torque of the valve core 2. When the flow pressure of the fluid in the conveying channel is relatively high and the user opens the ball valve, by increasing the transmission ratio between the driving member 3 and the valve core 2, the user can drive the valve core 2 to rotate with a smaller driving force.

[0037] It should be noted that the valve core 2 includes a connecting rod 24 and a switch ball 25. A plurality of transmission teeth 21 are all arranged at the upper end of the connecting rod 24. The switch ball 25 is connected and matched with the lower end of the connecting rod 24, and the switch ball 25 is located in the infusion channel 11. The driving member 3 drives the connecting rod 24 to drive the switch ball 25 to rotate. The switch ball 25 is used to open or close the infusion channel 11. By increasing the transmission ratio between the driving member 3 and the connecting rod 24, the driving force for driving the switch ball 25 to rotate by the driving member 3 can be increased, and the user can drive the valve core 2 to rotate with a smaller driving force.

[0038] In some specific embodiments, the driving member 3 can be a worm, and a turbine can be sleeved on the outer peripheral wall of the valve core 2. A plurality of transmission teeth 21 are all arranged on the outer peripheral wall of the turbine.

[0039] In some other specific embodiments, the driving member 3 can be a spur gear. A plurality of driving teeth 32 are arranged on the outer peripheral wall of the driving member 3, and the plurality of driving teeth 32 are spaced apart along the circumferential direction of the driving member 3.

[0040] In some specific embodiments, the fluid in the conveying channel can be water.

[0041] Thus, by arranging a plurality of transmission teeth 21 on the outer peripheral wall of the valve core 2 and a plurality of driving teeth 32 on the outer peripheral wall of the driving member 3, and the number of transmission teeth 21 is greater than the number of driving teeth 32, the transmission ratio between the driving member 3 and the valve core 2 can be increased, thereby increasing the driving torque of the driving member 3 on the valve core 2. Compared with the prior art, when the flow pressure of the fluid in the conveying channel is relatively high and the user opens the ball valve, by increasing the transmission ratio between the driving member 3 and the valve core 2, the user can drive the valve core 2 to rotate with a smaller driving force, thereby reducing the starting torque for the user to drive the ball valve, and further improving the user experience of using the ball valve.

[0042] Referring to Figure 2 、 Figure 3 、 Figure 5 and Figure 6 , in some embodiments of the present application, along the axial direction of the driving member 3, the driving member 3 divides the second pivot space 13 into a rotation space 131 and a driving space 132. Specifically, along the first direction of the valve body 1, the driving space 132 is located on the right side of the rotation space 131. The driving member 3 is hermetically arranged in the rotation space 131. A driving blade group 33 is arranged on the outer peripheral wall of the driving member 3. The driving blade group 33 is located in the driving space 132, and the driving teeth 32 are located in the rotation space 131. Such an arrangement can prevent the driving teeth 32 and the transmission teeth 21 from being soaked by the fluid, thereby minimizing the rusting of the driving teeth 32 and the transmission teeth 21, and further improving the service life of the driving member 3 and the service life of the valve core 2.

[0043] Further, the driving vane group 33 includes a plurality of driving vanes 331, and the plurality of driving vanes 331 are arranged at intervals in the circumferential direction of the driving member 3.

[0044] The small-torque ball valve 100 further includes: a shut-off mechanism 4. The valve body 1 defines a first liquid passage 14 and a second liquid passage 15. The first liquid passage 14 communicates between the liquid inlet 111 and the driving space 132, and the second liquid passage 15 communicates between the liquid outlet 112 and the driving space 132. The driving vane group 33 faces the first liquid passage 14. The fluid in the first liquid passage 14 drives the driving vane group 33 to drive the driving member 3 to rotate around the pivot axis of the driving member 3 and the valve body 1. Specifically, each of the plurality of driving vanes 331 is adapted to face the first liquid passage 14, and the fluid in the first liquid passage 14 drives the driving vane 331 to drive the driving member 3 to rotate.

[0045] Moreover, in the height direction of the valve body 1, the connection between the first liquid passage 14 and the driving space 132 is located below the connection between the second liquid passage 15 and the driving space 132. The driving vane 331 facing the first liquid passage 14 is located above the first liquid passage 14, and the driving vane 331 facing the second liquid passage 15 is located below the second liquid passage 15.

[0046] And, the shut-off mechanism 4 is arranged on the valve body 1. The shut-off mechanism 4 is used to open or close the first liquid passage 14. When the user opens the ball valve, the first liquid passage 14 is opened through the shut-off mechanism 4, and the fluid at the liquid inlet 111 enters the driving space 132 through the first liquid passage 14. When the fluid in the first liquid passage 14 enters the driving space 132, the fluid drives the driving vane group 33 to drive the driving member 3 to rotate. That is to say, the fluid drives the driving vane 331 to drive the driving member 3 to rotate, so that the driving force for the user to drive the valve core 2 to rotate can be further reduced, and the fluid in the driving space 132 enters the liquid outlet 112 through the second liquid passage 15.

[0047] After the ball valve is opened, the first liquid passage 14 is closed through the shut-off mechanism 4.

[0048] It should be noted that when the user closes the ball valve, the first liquid passage 14 is in a closed state.

[0049] Refer to Figure 2 、 Figure 3 、 Figure 5 and Figure 6, in some embodiments of the present application, both the driving space 132 and the driving vane group 33 are two. The two driving spaces 132 and the driving vane group 33 are both arranged at intervals along the axial direction of the driving member 3. The rotating space 131 is located between the two driving spaces 132, and the driving tooth 32 is located between the two driving vane groups 33. That is to say, along the first direction of the valve body 1, one of the two driving spaces 132 is located on the left side of the rotating space 131, and the other driving space 132 of the two driving spaces 132 is located on the right side of the rotating space 131. One of the two driving vane groups 33 is located on the left side of the driving tooth 32, and one of the two driving vane groups 33 is located on the right side of the driving tooth 32.

[0050] The valve body 1 defines a third liquid passage 16. The first liquid passage 14 communicates with one driving space 132, and the second liquid passage 15 communicates with the other driving space 132. The third liquid passage 16 communicates between the two driving spaces 132. Specifically, the first liquid passage 14 communicates with the driving space 132 located on the right side of the rotating space 131, and the second liquid passage 15 communicates with the driving space 132 located on the left side of the rotating space 131. And along the height direction of the valve body 1, the communication positions of the first liquid passage 14 and the corresponding driving space 132 and the communication positions of the second liquid passage 15 and the corresponding driving space 132 are both located below the driving member 3, and the communication positions of the third liquid passage 16 and the two driving spaces 132 are both located above the driving member 3.

[0051] Along the radial direction of the driving member 3, the communication position of the third liquid passage 16 and one driving space 132 is located on one side of the central axis of the driving member 3, and the communication position of the third liquid passage 16 and the other driving space 132 is located on the other side of the central axis of the driving member 3. Specifically, the communication position of the third liquid passage 16 and the driving space 132 located on the right side of the rotating space 131 is located in front of the central axis of the driving member 3, and the communication position of the third liquid passage 16 and the driving space 132 located on the left side of the rotating space 131 is located behind the central axis of the driving member 3. The radial direction of the driving member 3 may refer to Figure 2 the front-back direction in

[0052] The driving vane group 33 in the driving space 132 communicating with the liquid outlet 112 faces the third liquid passage 16. That is to say, the driving vane group 33 in the driving space 132 located on the left side of the rotating space 131 faces the third liquid passage 16. The fluid in the third liquid passage 16 drives the corresponding driving vane group 33 to drive the driving member 3 to rotate around the pivot axis of the driving member 3.

[0053] When the fluid in the driving space 132 located on the right side of the rotating space 131 flows into the driving space 132 located on the left side of the rotating space 131 through the third liquid channel 16, the fluid in the third liquid channel 16 drives the corresponding driving blade group 33 to drive the driving member 3 to rotate, so as to further reduce the driving force of the user to drive the valve core 2 to rotate, and the fluid in the driving space 132 located on the left side of the rotating space 131 enters the liquid outlet 112 through the second liquid channel 15.

[0054] Reference Figure 2 In some embodiments of the present application, a plurality of first seals 34 are sleeved on the outer peripheral wall of the driving member 3, and the plurality of first seals 34 are spaced apart along the axial direction of the driving member 3. A plurality of driving teeth 32 are located between any two adjacent first seals 34, and the first seals 34 are clamped between the driving member 3 and the inner wall of the rotating space 131.

[0055] By arranging a plurality of first seals 34 between the driving member 3 and the inner wall of the rotating space 131, the first seals 34 are used to prevent the liquid in the driving space 132 from entering the rotating space 131, thereby preventing the driving teeth 32 and the transmission teeth 21 from being soaked in the fluid, thereby minimizing rust on the driving teeth 32 and the transmission teeth 21, and further increasing the service life of the driving member 3 and the service life of the valve core 2.

[0056] Moreover, such a configuration can prevent the lubricating oil between the transmission teeth 21 and the driving teeth 32 from being washed away by the fluid, and can minimize the wear between the transmission teeth 21 and the driving teeth 32, thereby further improving the service life of the driving member 3 and the service life of the valve core 2.

[0057] In some specific embodiments, the first sealing member 34 is preferably a sealing ring.

[0058] Reference Figure 3 and Figure 4 In some embodiments of the present application, a shutoff hole 17 is provided on the outer peripheral wall of the valve body 1, and the shutoff hole 17 is connected to the first liquid channel 14. An angle is formed between the central axis of the shutoff hole 17 and the central axis of the first liquid channel 14. The shutoff mechanism 4 includes a shutoff member 41 and a limiting assembly 42. The shutoff member 41 is slidably arranged in the shutoff hole 17 along the axial direction of the shutoff hole 17. A mounting hole 411 is provided on the outer peripheral wall of the shutoff member 41. The limiting assembly 42 is arranged in the mounting hole 411. At least one limiting hole 171 is provided on the inner peripheral wall of the shutoff hole 17. The limiting hole 171 is located on a side of the first liquid channel 14 close to the open mouth of the shutoff hole 17. The limiting assembly 42 is suitable for extending into the limiting hole 171 so that the shutoff member 41 and the valve body 1 are limited and matched. The shutoff member 41 is used to open or close the first liquid channel 14.

[0059] Specifically, when the shut-off member 41 moves along the shut-off hole 17 closer to the first liquid passage 14 and the shut-off member 41 is completely opposite to the first liquid passage 14, the shut-off member 41 closes the first liquid passage 14. After the ball valve is opened, it can prevent the fluid in the infusion passage 11 from continuously impacting the driving vane group 33 through the first liquid passage 14, avoid damage to the driving vane group 33, and thus improve the service life of the driving vane group 33.

[0060] When the shut-off member 41 moves along the shut-off hole 17 away from the first liquid passage 14 and the shut-off member 41 is not opposite to the first liquid passage 14, the shut-off member 41 opens the first liquid passage 14, and the liquid at the liquid inlet 111 enters the driving space 132 through the first liquid passage 14.

[0061] Moreover, when the shut-off member 41 moves along the shut-off hole 17 away from the first liquid passage 14 to a preset position, the limiting component 42 extends into the limiting hole 171 so that the shut-off member 41 is in limiting cooperation with the valve body 1, thereby avoiding the shut-off member 41 detaching from the valve body 1 and further improving the working reliability of the ball valve.

[0062] Furthermore, there can be multiple limiting holes 171, and the multiple limiting holes 171 are arranged at intervals along the axial direction of the shut-off hole 17. The limiting component 42 can extend into one of the multiple limiting holes 171. When the limiting component 42 extends into different limiting holes 171, the distance between the end wall of the shut-off member 41 close to the bottom wall of the shut-off hole 17 and the first liquid passage 14 is different. Thus, it can be achieved to control the opening degree of the first liquid passage 14 by the limiting component 42 extending into one of the multiple limiting holes 171, and further achieve the technical effect of controlling the flow rate of the fluid in the first liquid passage 14.

[0063] In some specific embodiments, the shape of the shut-off member 41 and the shape of the shut-off hole 17 are both constructed as rectangles.

[0064] In some specific embodiments, the included angle between the central axis of the shut-off hole 17 and the central axis of the first liquid passage 14 can be 90 degrees.

[0065] Refer to Figure 3 and Figure 4 In some embodiments of the present application, the limiting component 42 includes a limiting member 421 and an elastic member 422. The limiting member 421 is adapted to extend into or out of the mounting hole 411. The elastic member 422 is elastically deformed and arranged between the limiting member 421 and the bottom wall of the mounting hole 411. The part of the limiting member 421 extending out of the mounting hole 411 is adapted to extend into or out of the limiting hole 171, and the limiting member 421 is adapted to be in limiting cooperation with the limiting hole 171.

[0066] Specifically, when the limiting member 421 moves close to the limiting hole 171 and faces the limiting hole 171, the elastic member 422 drives the limiting member 421 to extend into the limiting hole 171. The limiting member 421 abuts against and is in limiting cooperation with the inner peripheral wall of the limiting hole 171, so that the technical effect of limiting cooperation between the flow intercepting member 41 and the valve body 1 can be achieved.

[0067] Moreover, by applying a large driving force to the flow intercepting member 41 to move the limiting member 421 away from the limiting hole 171, the inner peripheral wall of the limiting hole 171 drives the part of the structure of the limiting member 421 extending out of the mounting hole 411 to move out of the limiting hole 171, and then the inner wall of the intercepting hole 17 facing the limiting member 421 drives the limiting member 421 to completely extend into the mounting hole 411.

[0068] It should be noted that the shape of the end of the flow intercepting member 41 extending out of the mounting hole 411 is hemispherical, and the shape of the limiting hole 171 is hemispherical.

[0069] In some specific embodiments, the elastic member 422 is preferably a spring.

[0070] Refer to Figure 7 , in some embodiments of the present application, a limiting groove 121 is provided on the inner peripheral wall of the first pivoting space 12. The shape of the limiting groove 121 is arc-shaped. Specifically, along the height direction of the valve body 1, the limiting groove 121 is located on the side of the first pivoting space 12 away from the infusion channel 11. A limiting portion 22 is provided on the outer peripheral wall of the valve core 2. The limiting portion 22 is movably arranged in the limiting groove 121. The limiting portion 22 is adapted to abut against the side wall of the limiting groove 121, so that the valve core 2 and the valve body 1 are in limiting cooperation.

[0071] Specifically, along the first direction of the valve body 1, when the driving member 3 drives the valve core 2 to rotate to open the infusion channel 11, the valve core 2 drives the limiting portion 22 to rotate around the central axis of the valve core 2. When the valve core 2 completely opens the infusion channel 11, the limiting portion 22 abuts against the right side wall of the limiting groove 121, so that it can be avoided that the valve core 2 rotates excessively and the infusion channel 11 is not completely opened, and thus the working reliability of the ball valve can be improved.

[0072] When the driving member 3 drives the valve core 2 to rotate to close the infusion channel 11, the valve core 2 drives the limiting portion 22 to rotate around the central axis of the valve core 2. When the valve core 2 completely closes the infusion channel 11, the limiting portion 22 abuts against the side end wall of the limiting groove 121.

[0073] Refer to Figure 8 , in some embodiments of the present application, a second sealing member 23 is clamped between the valve core 2 and the inner wall of the first pivoting space 12. The second sealing member 23 is hermetically arranged with both the valve core 2 and the valve body 1. Specifically, the second sealing member 23 is sleeved on the outer peripheral wall of the valve core 2.

[0074] By providing a second seal 23 between the valve core 2 and the inner wall of the rotation space 131, it is possible to prevent the fluid in the infusion channel 11 from entering the first pivot space 12 and the second pivot space 13, and to prevent the drive gear 32 and the transmission gear 21 from being immersed in the fluid. Thus, rusting of the drive gear 32 and the transmission gear 21 can be minimized, thereby improving the service life of the drive member 3 and the valve core 2.

[0075] In some specific embodiments, the second seal 23 is preferably an O-ring.

[0076] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A small torque ball valve, characterized in that: include: A valve body (1), the valve body (1) defining a liquid infusion channel (11), a first pivoting space (12) and a second pivoting space (13), the liquid infusion channel (11) forming a liquid inlet (111) and a liquid outlet (112) on an outer peripheral wall of the valve body (1), the first pivoting space (12) being in communication with both the liquid infusion channel (11) and the second pivoting space (13); a valve core (2), the valve core (2) being pivotally mounted in the first pivoting space (12) and extending into the infusion channel (11), a plurality of transmission teeth (21) being arranged around the outer peripheral wall of the end of the valve core (2) away from the infusion channel (11), the plurality of transmission teeth (21) being arranged in sequence along the circumferential direction of the valve core (2), and the valve core (2) being used to open or close the infusion channel (11); A driving member (3), wherein the driving member (3) is pivotally mounted in the second pivot space (13), the driving member (3) passes through the valve body (1) and a driving hand wheel (31) is provided at the end thereof, a plurality of driving teeth (32) are provided on the outer peripheral wall of the driving member (3), the plurality of driving teeth (32) are spaced apart and arranged along the axial direction of the driving member (3), the number of the transmission teeth (21) is greater than the number of the driving teeth (32), the driving teeth (32) are meshingly connected with the transmission teeth (21), the driving hand wheel (31) is used to drive the driving member (3) to rotate around the pivot axis of the driving member (3), and the driving member (3) is used to drive the valve core (2) to rotate around the pivot axis of the valve core (2) and.

2. A low torque ball valve according to claim 1, characterized in that: Along the axial direction of the driving member (3), the driving member (3) divides the second pivoting space (13) into a rotating space (131) and a driving space (132); the driving member (3) is sealed in the rotating space (131); a driving blade group (33) is provided on the outer peripheral wall of the driving member (3); the driving blade group (33) is located in the driving space (132); and the driving tooth (32) is located in the rotating space (131); The small torque ball valve (100) further comprises: a shut-off mechanism (4); the valve body (1) defines a first liquid channel (14) and a second liquid channel (15); the first liquid channel (14) is connected between the liquid inlet (111) and the drive space (132); the second liquid channel (15) is connected between the liquid outlet (112) and the drive space (132); the drive blade group (33) is opposite to the first liquid channel (14); the fluid in the first liquid channel (14) drives the drive blade group (33) to drive the drive member (3) to rotate around the pivot axis of the drive member (3); the shut-off mechanism (4) is arranged on the valve body (1); and the shut-off mechanism (4) is used to open or close the first liquid channel (14).

3. A low torque ball valve according to claim 2, characterized in that: There are two drive spaces (132) and two drive blade groups (33), and the two drive spaces (132) and the two drive blade groups (33) are arranged spaced apart in the axial direction of the drive member (3), the rotation space (131) is located between the two drive spaces (132), and the drive teeth (32) are located between the two drive blade groups (33); The valve body (1) defines a third liquid channel (16), the first liquid channel (14) is connected to one of the drive spaces (132), the second liquid channel (15) is connected to the other of the drive spaces (132), and the third liquid channel (16) is connected between the two drive spaces (132). Along the radial direction of the drive member (3), the connection point between the third liquid channel (16) and one of the drive spaces (132) is located on one side of the central axis of the drive member (3), and the connection point between the third liquid channel (16) and the other of the drive space (132) is located on the other side of the central axis of the drive member (3). The drive blade group (33) in the drive space (132) connected to the liquid outlet (112) is opposite to the third liquid channel (16), and the fluid in the third liquid channel (16) drives the corresponding drive blade group (33) to drive the drive member (3) to rotate around the pivot axis of the drive member (3).

4. A low torque ball valve according to claim 2, characterized in that: The outer peripheral wall of the driving member (3) is sleeved with a plurality of first seals (34), and the plurality of first seals (34) are spaced apart along the axial direction of the driving member (3). The plurality of driving teeth (32) are located between any two adjacent first seals (34), and the first seals (34) are sandwiched between the driving member (3) and the inner wall of the rotating space (131).

5. A low torque ball valve according to claim 2, characterized in that: The valve body (1) is provided with a shutoff hole (17), the shutoff hole (17) being in communication with the first liquid channel (14), and an angle being formed between the central axis of the shutoff hole (17) and the central axis of the first liquid channel (14); the shutoff mechanism (4) comprises a shutoff member (41) and a limiting assembly (42); the shutoff member (41) is slidably arranged in the shutoff hole (17) along the axial direction of the shutoff hole (17); a mounting hole (411) is arranged on the outer peripheral wall of the shutoff member (41); the limiting assembly (42) is arranged in the mounting hole (411); at least one limiting hole (171) is arranged on the inner peripheral wall of the shutoff hole (17); the limiting assembly (42) is suitable for extending into the limiting hole (171) so that the shutoff member (41) and the valve body (1) are limitedly matched; the shutoff member (41) is used to open or close the first liquid channel (14).

6. A low torque ball valve according to claim 5, characterized in that: The limiting component (42) comprises a limiting member (421) and an elastic member (422); the limiting member (421) is suitable for extending into or moving out of the mounting hole (411); the elastic member (422) is elastically deformably arranged between the limiting member (421) and the bottom wall of the mounting hole (411); the portion of the limiting member (421) extending out of the mounting hole (411) is suitable for extending into or moving out of the limiting hole (171); and the limiting member (421) is suitable for limiting cooperation with the limiting hole (171).

7. A low torque ball valve according to claim 1, characterized in that: The inner peripheral wall of the first pivoting space (12) is provided with a limiting groove (121), the shape of the limiting groove (121) is arc-shaped, and the outer peripheral wall of the valve core (2) is provided with a limiting portion (22), the limiting portion (22) is movably arranged in the limiting groove (121), and the limiting portion (22) is suitable for abutting against the side wall of the limiting groove (121) so that the valve core (2) and the valve body (1) are limited and matched.

8. A low torque ball valve according to claim 1, characterized in that: A second sealing member (23) is sandwiched between the valve core (2) and the first pivoting space (12), and the second sealing member (23) is sealed with the valve core (2) and the valve body (1).

Images