A driving sleeve applied to a ball valve
Patent Information
- Application Number
- CN202522486597.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-24
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-24
AI Technical Summary
但是一体式加长阀杆存在明显局限性：加工难度大，超长杆体易变形且精度难以保证；结构刚性不足，强度表现不佳；执行器适配灵活性差；后续维修需整体更换，成本较高
[0018]本实用新型提供了一种应用于球阀的驱动套，通过将驱动套的结构设置为分体式的连接轴和连接套，在连接轴的第一连接部上设置第一键槽，在第一键槽内设置第一连接键，使第一连接部能够通过第一连接键与球阀的执行器实现传动连接，在连接轴的第二连接部设置第二键槽，在第二键槽内设置第二连接键，并将连接套的连接通孔设置为包括第一连接区域和第二连接区域，在第一连接区域开设第三键槽，在第二连接区域开设第五键槽，同时在球阀的阀杆端部开设第四键槽，在第四键槽内设置第三连接键。这样使得，连接轴的第二连接部能够通过第二连接键与连接套的第一连接区域实现连接，连接套的第二连接区域能够通过第三连接键与球阀的阀杆的端部实现连接。这样，在使用上述驱动套传递扭矩时，执行器输出的扭矩能够通过自身的输出端传递至连接轴的第一连接部，带动整个连接轴转动，然后连接轴的第二连接部能够将扭矩传递至连接套的第一连接区域，带动整个连接套转动，最后连接套的第二连接区域能够将扭矩传递至球阀的阀杆，使阀杆转动，进而实现了执行器输出的扭矩传递至球阀的阀杆。将驱动套设置为上述结构，既能够顺利实现执行器输出扭矩的传递，又能够在驱动套的加工制造过程中，规避了在使用焊接工艺对驱动套进行加工时，会由于焊接工艺的特性（高温使材料熔化）造成烧损损耗、飞溅损耗以及余高和修整损耗的缺陷，降低了驱动套的加工制造成本；同时在使用上述驱动套的过程中，连接轴的第二连接部和球阀的阀杆端部设置于（或者说插入）同一个连接通孔内部，避免了由于焊接工艺造成的连接强度不足的情况发生，同时也避免了由于焊接工艺造成的连接轴（或者说执行器的输出端）与球阀的阀杆之间的同轴度偏差，提高了执行器与球阀阀杆之间扭矩传输的稳定性和可靠性。
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Figure CN224836326U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of ball valve control components, and in particular to a drive sleeve applied to a ball valve. Background Technology
[0002] In the structural design of ball valves, there are many special operating conditions that require the use of extended valve stems, such as deeply buried pipeline systems, equipment with thick insulation layers, and scenarios where the medium temperature is high and a safe distance must be maintained between the actuator and the valve body. In these cases, an extended valve stem structure is needed to transmit torque. However, an integrated extended valve stem has significant limitations: it is difficult to manufacture, the extra-long stem is prone to deformation and precision is difficult to guarantee; the structural rigidity is insufficient, resulting in poor strength performance; the actuator adaptability is poor; and subsequent maintenance requires complete replacement, leading to high costs. Therefore, related technologies typically incorporate a drive sleeve structure between the actuator and the ball valve stem to address these issues.
[0003] Existing drive sleeves are generally manufactured using welding. While this design is feasible for small-sized products or applications using non-precious metal materials, its drawbacks become increasingly apparent as product size increases, weight increases, and operating space becomes limited: First, precious metal materials suffer significant losses during welding, and the welding process itself is costly, leading to an overall increase in manufacturing costs; second, welded joints of high-strength materials are prone to performance instability, affecting transmission reliability; and third, after welding, the coaxiality accuracy of the drive sleeve is difficult to control precisely, easily causing risks such as torque transmission deviation and component jamming.
[0004] Therefore, there is an urgent need for a drive sleeve for ball valves to solve the above-mentioned technical problems. Utility Model Content
[0005] The purpose of this invention is to provide a drive sleeve for ball valves, which reduces the manufacturing cost of the drive sleeve and improves the reliability of torque transmission between the actuator and the valve stem.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] This utility model provides a drive sleeve for a ball valve, used to transmit the torque output by an actuator to the valve stem of the ball valve to drive the ball in the ball valve to rotate; the drive sleeve is disposed between the actuator and the valve stem; the drive sleeve includes a connecting shaft and a connecting sleeve; wherein, the connecting shaft includes a first connecting portion and a second connecting portion arranged along a first direction; the first connecting portion has a first keyway; the first keyway extends along the first direction; the first direction is the extension direction of the connecting shaft; a first connecting key is provided inside the first keyway; the first connecting portion is drively connected to the actuator through the first connecting key; the second connecting portion has a second keyway; the second keyway extends along the first direction; the second key... A second connecting key is provided inside the groove; the connecting sleeve has a connecting through hole along the first direction; the inner wall of the connecting through hole includes a first connecting area and a second connecting area arranged along the first direction; a third keyway is provided on the first connecting area on the inner wall of the connecting through hole; the extension direction of the third keyway is parallel to the extension direction of the second keyway, and the third keyway is adapted to the second connecting key; a fourth keyway is provided at the end of the valve stem; the fourth keyway extends along the first direction; a third connecting key is provided inside the fourth keyway; a fifth keyway is provided in the second connecting area; the extension direction of the fifth keyway is parallel to the extension direction of the fourth keyway, and the fifth keyway is adapted to the third connecting key.
[0008] In some embodiments, the third keyway is internally connected to the fifth keyway.
[0009] In some embodiments, the first keyway is a flat keyway; the number of the first keyways is multiple; the multiple first keyways are arranged at uniform intervals around the axis of the connecting shaft on the outer peripheral sidewall of the first connecting part.
[0010] In some embodiments, the third keyway is a flat keyway; there are multiple third keyways; the multiple third keyways are arranged at uniform intervals around the axis of the connecting sleeve on the inner sidewall of the connecting through hole.
[0011] In some embodiments, the fifth keyway is a flat keyway; there are multiple fifth keyways; the multiple fifth keyways are arranged at uniform intervals around the axis of the connecting sleeve on the inner sidewall of the connecting through hole.
[0012] In some embodiments, a first limiting member is provided between the first connecting portion and the second connecting portion; the first limiting member is provided around the outer peripheral wall of the connecting shaft.
[0013] In some embodiments, a second limiting member is provided on the inner peripheral wall of the connecting through hole; the second limiting member extends circumferentially along the inner peripheral wall of the connecting through hole and is located between the first connecting region and the second connecting region.
[0014] In some embodiments, in the first direction, the ratio of the size of the first connecting region to the size of the second connecting region is 1:1.
[0015] In some embodiments, in the first direction, the ratio of the size of the first connecting portion to the size of the second connecting portion is 1:1.
[0016] In some embodiments, in the first direction, the ratio of the size of the second connecting portion to the size of the first connecting region is 1:1.
[0017] The beneficial effects of this utility model are:
[0018] This invention provides a drive sleeve for a ball valve. The drive sleeve is designed as a split-type connecting shaft and connecting sleeve. A first keyway is provided on the first connecting part of the connecting shaft, and a first connecting key is provided within the first keyway, enabling the first connecting part to be driven to the actuator of the ball valve via the first connecting key. A second keyway is provided on the second connecting part of the connecting shaft, and a second connecting key is provided within the second keyway. The connecting through hole of the connecting sleeve is configured to include a first connecting area and a second connecting area. A third keyway is provided in the first connecting area, and a fifth keyway is provided in the second connecting area. Simultaneously, a fourth keyway is provided at the end of the ball valve stem, and a third connecting key is provided within the fourth keyway. This allows the second connecting part of the connecting shaft to be connected to the first connecting area of the connecting sleeve via the second connecting key, and the second connecting area of the connecting sleeve to be connected to the end of the ball valve stem via the third connecting key. In this way, when the aforementioned drive sleeve is used to transmit torque, the torque output by the actuator can be transmitted through its own output end to the first connecting part of the connecting shaft, causing the entire connecting shaft to rotate. Then, the second connecting part of the connecting shaft can transmit the torque to the first connecting area of the connecting sleeve, causing the entire connecting sleeve to rotate. Finally, the second connecting area of the connecting sleeve can transmit the torque to the valve stem of the ball valve, causing the valve stem to rotate, thereby realizing the transmission of the torque output by the actuator to the valve stem of the ball valve. By configuring the drive sleeve with the above structure, the actuator output torque can be smoothly transmitted. Furthermore, during the manufacturing process of the drive sleeve, defects such as burn-in loss, spatter loss, excess material loss, and finishing loss caused by the characteristics of welding (high temperature melting the material) are avoided, thus reducing the manufacturing cost of the drive sleeve. Simultaneously, during the use of the drive sleeve, the second connecting part of the connecting shaft and the valve stem end of the ball valve are located (or inserted) inside the same connecting through hole, avoiding insufficient connection strength caused by welding. This also avoids coaxiality deviation between the connecting shaft (or the actuator output end) and the valve stem of the ball valve caused by welding, improving the stability and reliability of torque transmission between the actuator and the ball valve stem. Attached Figure Description
[0019] Figure 1 This is a structural diagram of a drive sleeve and valve stem used in a ball valve, provided by a specific embodiment of this utility model.
[0020] In the picture:
[0021] 1. Connecting shaft; 11. First connecting part; 111. First keyway; 112. First connecting key; 12. Second connecting part; 121. Second keyway; 122. Second connecting key; 2. Connecting sleeve; 21. First connecting area; 211. Third keyway; 22. Second connecting area; 221. Fifth keyway; 10. Valve stem; 101. Fourth keyway; 102. Third connecting key;
[0022] X1, first direction. Detailed Implementation
[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0026] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0027] like Figure 1As shown, this embodiment provides a drive sleeve for a ball valve, used to transmit the torque output by the actuator to the valve stem 10 of the ball valve to drive the ball in the ball valve to rotate. The drive sleeve is disposed between the actuator and the valve stem 10. The drive sleeve includes a connecting shaft 1 and a connecting sleeve 2. It is easy to understand that the actuator can be a basic manual actuator (requiring no external power, operated manually, commonly in the form of a handle, handwheel, or worm gear box), an electric actuator (powered by a motor, enabling automatic control and remote operation, with a wide output torque range and high adaptability), or a pneumatic actuator (powered by compressed air, with fast response and compact structure). Furthermore, the output end of the actuator can be a solid shaft or a hollow shaft (similar to a bushing structure, or having a connecting groove at the end of a solid shaft). Those skilled in the art can flexibly configure it according to actual usage requirements, which will not be described in detail here.
[0028] like Figure 1 As shown, the connecting shaft 1 includes a first connecting portion 11 and a second connecting portion 12 arranged along a first direction X1, where the first direction X1 is the extension direction of the connecting shaft 1. A first keyway 111 is provided on the first connecting portion 11 of the connecting shaft 1, and the first keyway 111 extends along the first direction X1. A first connecting key 112 is provided inside the first keyway 111. It is easy to understand that the first keyway 111 can be a flat keyway or a spline keyway, and correspondingly, the first connecting key 112 can be a flat key or a spline key. Further, when the first connecting key 112 is a flat key, the first connecting key 112 can be a type A (round head) key, a type B (flat head) key, or a type C (single round head) key. Those skilled in the art can set it according to actual usage requirements, which will not be described in detail here. The first connecting portion 11 of the connecting shaft 1 is connected to the actuator for transmission through the first connecting key 112. A second keyway 121 is provided on the second connecting portion 12 of the connecting shaft 1, and the second keyway 121 extends along the first direction X1. A second connecting key 122 is provided inside the second keyway 121. It is easy to understand that the second keyway 121 can be a flat keyway or a spline keyway, and correspondingly, the second connecting key 122 can be a flat key or a spline key. Furthermore, when the second connecting key 122 is a flat key, it can be an A-type (round head) key, a B-type (flat head) key, or a C-type (single round head) key. Those skilled in the art can set it according to actual usage requirements, which will not be described in detail here.
[0029] like Figure 1As shown, the connecting sleeve 2 has a connecting through hole along the first direction X1. The inner wall of the connecting through hole includes a first connecting region 21 and a second connecting region 22 arranged along the first direction X1. A third keyway 211 is formed on the first connecting region 21 on the inner wall of the connecting through hole. The extending direction of the third keyway 211 is parallel to the extending direction of the second keyway 121, and the third keyway 211 is adapted to the second connecting key 122. That is, the type of the third keyway 211 is the same as that of the second connecting key 122 (when the second connecting key 122 is a flat key or a spline, the third keyway 211 is set to a flat keyway or a spline keyway accordingly), and the width of the third keyway 211 is the same as the width of the second connecting key 122 (it is easy to understand that if the second connecting key 122 is a flat key, the width of the third keyway 211 is the same as the width of the second connecting key 122; if the second connecting key 122 is a spline, the width of each toothed groove in the third keyway 211 is the same as the width of each toothed protrusion in the second connecting key 122).
[0030] like Figure 1 As shown, the end of the valve stem 10 of the ball valve is provided with a fourth keyway 101, which extends along the first direction X1. A third connecting key 102 is provided inside the fourth keyway 101. A fifth keyway 221 is provided in the second connecting area 22 of the connecting sleeve 2. The extending direction of the fifth keyway 221 is parallel to the extending direction of the fourth keyway 101, and the fifth keyway 221 is adapted to the third connecting key 102. The structures of the fourth keyway 101, the third connecting key 102, and the fifth keyway 221 can be set with reference to the structures of the second keyway 121, the second connecting key 122, and the third keyway 211 described above, and will not be repeated here.
[0031] Therefore, this embodiment provides a drive sleeve for a ball valve, which is configured as a split connecting shaft 1 and a connecting sleeve 2. A first keyway 111 is provided on the first connecting part 11 of the connecting shaft 1, and a first connecting key 112 is provided in the first keyway 111, so that the first connecting part 11 can be connected to the actuator of the ball valve through the first connecting key 112. A second keyway 121 is provided on the second connecting part 12 of the connecting shaft 1, and a second connecting key 122 is provided in the second keyway 121. The connecting through hole of the connecting sleeve 2 is configured to include a first connecting area 21 and a second connecting area 22. A third keyway 211 is opened in the first connecting area 21, and a fifth keyway 221 is opened in the second connecting area 22. At the same time, a fourth keyway 101 is opened at the end of the valve stem 10 of the ball valve, and a third connecting key 102 is provided in the fourth keyway 101. This allows the second connecting portion 12 of the connecting shaft 1 to be connected to the first connecting area 21 of the connecting sleeve 2 via the second connecting key 122, and the second connecting area 22 of the connecting sleeve 2 to be connected to the end of the valve stem 10 of the ball valve via the third connecting key 102. Thus, when the aforementioned drive sleeve transmits torque, the torque output by the actuator can be transmitted through its output end to the first connecting portion 11 of the connecting shaft 1, causing the entire connecting shaft 1 to rotate. Then, the second connecting portion 12 of the connecting shaft 1 can transmit the torque to the first connecting area 21 of the connecting sleeve 2, causing the entire connecting sleeve 2 to rotate. Finally, the second connecting area 22 of the connecting sleeve 2 can transmit the torque to the valve stem 10 of the ball valve, causing the valve stem 10 to rotate, thereby realizing the transmission of the torque output by the actuator to the valve stem 10 of the ball valve. By configuring the drive sleeve with the above structure, the transmission of the actuator's output torque can be smoothly realized. At the same time, during the manufacturing process of the drive sleeve, the defects caused by the characteristics of the welding process (the material melts at high temperature), such as burn-off loss, spatter loss, excess height and trimming loss, are avoided, thus reducing the manufacturing cost of the drive sleeve. At the same time, during the use of the above drive sleeve, the second connecting part 12 of the connecting shaft 1 and the end of the valve stem 10 of the ball valve are set (or inserted) inside the same connecting through hole, avoiding the occurrence of insufficient connection strength due to the welding process. It also avoids the coaxiality deviation between the connecting shaft 1 (or the output end of the actuator) and the valve stem 10 of the ball valve caused by the welding process, thus improving the stability and reliability of torque transmission between the actuator and the valve stem 10 of the ball valve.
[0032] In some embodiments, the third keyway 211 in the first connecting region 21 of the connecting sleeve 2 is connected to the fifth keyway 221 in the second connecting region 22. This arrangement allows the third keyway 211 and the fifth keyway 221 to be machined simultaneously in a single machining operation, improving the manufacturing efficiency of the drive sleeve.
[0033] In some embodiments, the first keyway 111 on the first connecting portion 11 of the connecting shaft 1 is a flat keyway. There are multiple first keyways 111, which are evenly spaced around the axis of the connecting shaft 1. For example, there are two first keyways 111, which are evenly spaced around the axis of the connecting shaft 1. In other words, the two first keyways 111 are arranged in a circular array with the axis of the connecting shaft 1 as the central axis and a pitch angle of 180°. It is easy to understand that the number of first keyways 111 can also be other, such as three or four, etc. Those skilled in the art can make specific settings according to actual usage requirements, and these will not be exhaustively listed here. This arrangement improves the robustness of the connection between the first connecting portion 11 of the connecting shaft 1 and the actuator, thereby improving the reliability of torque transmission between the actuator and the ball valve stem 10.
[0034] In some embodiments, the third keyway 211 formed on the first connecting area 21 of the connecting sleeve 2 is a flat keyway. There are multiple third keyways 211, which are evenly spaced around the axis of the connecting sleeve 2. For example, there are two third keyways 211, which are evenly spaced around the axis of the connecting sleeve 2. In other words, the two third keyways 211 are arranged in a circular array with the axis of the connecting sleeve 2 as the central axis and a pitch angle of 180°. It is easy to understand that the number of third keyways 211 can also be set to other quantities, such as three or four, etc. Those skilled in the art can make specific settings according to actual usage requirements, and these will not be exhaustively listed here. This arrangement improves the firmness of the connection between the first connecting area 21 of the connecting sleeve 2 and the second connecting portion 12 of the connecting shaft 1, further improving the reliability of torque transmission between the actuator and the ball valve stem 10.
[0035] In some embodiments, the fifth keyway 221 formed on the second connection area 22 of the connecting sleeve 2 is a flat keyway. There are multiple fifth keyways 221, which are evenly spaced around the axis of the connecting sleeve 2. For example, there are two fifth keyways 221, which are evenly spaced around the axis of the connecting sleeve 2. In other words, the two fifth keyways 221 are arranged in a circular array with the axis of the connecting sleeve 2 as the central axis and a pitch angle of 180°. It is easy to understand that the number of fifth keyways 221 can also be set to other quantities, such as three or four, etc. Those skilled in the art can make specific settings according to actual usage requirements, and these will not be exhaustively listed here. This arrangement improves the robustness of the connection between the second connection area 22 of the connecting sleeve 2 and the end of the ball valve stem 10, further enhancing the reliability of torque transmission between the actuator and the ball valve stem 10.
[0036] In some embodiments, a first limiting member is provided between the first connecting portion 11 and the second connecting portion 12 of the connecting shaft 1. This first limiting member surrounds the outer peripheral wall of the connecting shaft 1. In other words, the first limiting member is an annular protrusion structure. This arrangement limits the connecting shaft 1 in the first direction X1, preventing the second connecting portion 12 of the connecting shaft 1 from inserting too deeply into the connecting sleeve 2, thus affecting the connection between the connecting sleeve 2 and the end of the valve stem 10.
[0037] In some embodiments, a second limiting member is provided on the inner peripheral wall of the connecting through hole of the connecting sleeve 2. This second limiting member extends circumferentially along the inner peripheral wall of the connecting through hole and is located between the first connecting region 21 and the second connecting region 22. In other words, this second limiting member is also an annular protrusion structure. Alternatively, to accommodate embodiments where the third keyway 211 and the fifth keyway 221 are connected, the second limiting member can also be adaptively configured as multiple arc-shaped protrusion structures, with the third keyway 211 and the fifth keyway 221 communicating with two adjacent arc-shaped protrusion structures. This configuration limits the connection shaft 1 and the ball valve stem 10 in the first direction X1, preventing the second connecting portion 12 of the connection shaft 1 from inserting too deeply into the connecting sleeve 2 or the end of the valve stem 10 from inserting too deeply into the connecting sleeve 2, thus avoiding mutual interference.
[0038] In some embodiments, in the first direction X1, the ratio of the size of the first connecting region 21 to the size of the second connecting region 22 of the connecting sleeve 2 is 1:1. In other words, in the first direction X1, the size of the first connecting region 21 and the size of the second connecting region 22 of the connecting sleeve 2 are equal. For example, if the size of the first connecting region 21 in the first direction X1 is 500mm, then the size of the second connecting region 22 in the first direction X1 is also 500mm. By setting it this way, the torque transmission can be more balanced, improving the reliability of the structure. That is, the force contact length of the two connecting regions of the connecting sleeve 2 is consistent, and the load is evenly distributed in the transmission path of torque from the actuator, connecting shaft 1, connecting sleeve 2, and valve stem 10, avoiding local stress concentration caused by insufficient length in a single connecting region.
[0039] In some embodiments, in the first direction X1, the ratio of the size of the first connecting portion 11 to the size of the second connecting portion 12 of the connecting shaft 1 is 1:1. In other words, in the first direction X1, the size of the first connecting portion 11 and the size of the second connecting portion 12 of the connecting shaft 1 are equal. For example, if the size of the first connecting portion 11 in the first direction X1 is 500 mm, then the size of the second connecting portion 12 in the first direction X1 is also 500 mm. By setting it in this way, the torque transmission can be more balanced, improving the reliability of the structure. That is, the force contact length of the two connecting portions of the connecting shaft 1 is consistent, and the load is evenly distributed in the transmission path of torque from the actuator, connecting shaft 1, connecting sleeve 2, and valve stem 10, further avoiding local stress concentration caused by insufficient length of a single connecting portion.
[0040] In some embodiments, in the first direction X1, the ratio of the size of the second connecting portion 12 of the connecting shaft 1 to the size of the first connecting area 21 of the connecting sleeve 2 is 1:1. In other words, in the first direction X1, the size of the first connecting portion 11 of the connecting shaft 1 is equal to the size of the first connecting area 21 of the connecting sleeve 2. For example, if the size of the second connecting portion 12 of the connecting shaft 1 in the first direction X1 is 500mm, then the size of the first connecting area 21 of the connecting sleeve 2 in the first direction X1 is also 500mm. With this arrangement, torque transmission can be made more stable, and the torque-bearing capacity of the connection between the connecting shaft 1 and the connecting sleeve 2 is stronger. That is, the contact mating lengths of the second connecting portion 12 of the connecting shaft 1 and the first connecting area 21 of the connecting sleeve 2 are consistent, and the load is evenly distributed across the entire mating surface during torque transmission, avoiding local stress concentration caused by mismatch in contact length.
[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A drive sleeve for a ball valve, used to transmit torque output from an actuator to the valve stem (10) of the ball valve to drive the ball in the ball valve to rotate; the drive sleeve is disposed between the actuator and the valve stem (10); characterized in that, include: A connecting shaft (1) includes a first connecting portion (11) and a second connecting portion (12) arranged along a first direction (X1); the first connecting portion (11) has a first keyway (111); the first keyway (111) extends along the first direction (X1); the first direction (X1) is the extension direction of the connecting shaft (1); a first connecting key (112) is provided inside the first keyway (111); the first connecting portion (11) is connected to the actuator via the first connecting key (112); the second connecting portion (12) has a second keyway (121); the second keyway (121) extends along the first direction (X1); a second connecting key (122) is provided inside the second keyway (121). A connecting sleeve (2) has a connecting through hole along the first direction (X1); the inner wall of the connecting through hole includes a first connecting area (21) and a second connecting area (22) arranged along the first direction (X1); a third keyway (211) is provided on the first connecting area (21) on the inner wall of the connecting through hole; the extension direction of the third keyway (211) is parallel to the extension direction of the second keyway (121), and the third keyway (211) is adapted to the second connecting key (122); The valve stem (10) has a fourth keyway (101) at its end; the fourth keyway (101) extends along the first direction (X1); a third connecting key (102) is provided inside the fourth keyway (101); a fifth keyway (221) is provided in the second connecting area (22); the extension direction of the fifth keyway (221) is parallel to the extension direction of the fourth keyway (101), and the fifth keyway (221) is adapted to the third connecting key (102).
2. The drive sleeve according to claim 1, characterized in that, The third keyway (211) is internally connected to the fifth keyway (221).
3. The drive sleeve according to claim 1, characterized in that, The first keyway (111) is a flat keyway; there are multiple first keyways (111); the multiple first keyways (111) surround the axis of the connecting shaft (1) and are evenly spaced on the outer peripheral sidewall of the first connecting part (11).
4. The drive sleeve according to claim 1, characterized in that, The third keyway (211) is a flat keyway; there are multiple third keyways (211); the multiple third keyways (211) surround the axis of the connecting sleeve (2) and are evenly spaced on the inner sidewall of the connecting through hole.
5. The drive sleeve according to claim 1, characterized in that, The fifth keyway (221) is a flat keyway; there are multiple fifth keyways (221); the multiple fifth keyways (221) surround the axis of the connecting sleeve (2) and are evenly spaced on the inner sidewall of the connecting through hole.
6. The drive sleeve according to claim 1, characterized in that, A first limiting member is provided between the first connecting part (11) and the second connecting part (12); the first limiting member is provided around the outer peripheral wall of the connecting shaft (1).
7. The drive sleeve according to claim 1, characterized in that, A second limiting member is provided on the inner peripheral wall of the connecting through hole; the second limiting member extends circumferentially along the inner peripheral wall of the connecting through hole and is located between the first connecting area (21) and the second connecting area (22).
8. The drive sleeve according to any one of claims 1 to 7, characterized in that, In the first direction (X1), the ratio of the size of the first connecting region (21) to the size of the second connecting region (22) is 1:
1.
9. The drive sleeve according to claim 8, characterized in that, In the first direction (X1), the ratio of the size of the first connecting part (11) to the size of the second connecting part (12) is 1:
1.
10. The drive sleeve according to claim 9, characterized in that, In the first direction (X1), the ratio of the size of the second connecting part (12) to the size of the first connecting area (21) is 1:1.