Pneumatic adjusting ball valve executing mechanism

Abstract

The utility model relates to the technical field of pneumatic adjusting ball valves, and discloses a pneumatic adjusting ball valve executing mechanism which comprises a ball valve, a support is arranged on the ball valve, a speed change gear box is arranged on the support, the input end of the speed change gear box is connected with a driving assembly, and the driving assembly comprises an air cylinder arranged on the support. The output end of the air cylinder is in transmission connection with a rotating plate, a grip is arranged at one end of the rotating plate, and a locking piece is arranged at the lower end of the grip. The air cylinder stretches out and draws back to drive the rotating plate to drive the input shaft to rotate, so that the output shaft rotates, the rotating angle of the valve rod is accurately measured through the encoder, the valve control precision is improved, meanwhile, when the rotating plate breaks down, the guide rod is taken down, and the valve opening and closing adjusting operation is completed by rotating the grip; the position locking device has the advantages of being high in control precision, high in operation flexibility and good in fault handling capacity.

Description

Technical Field

[0001] This application relates to the field of pneumatic regulating ball valve technology, and in particular to a pneumatic regulating ball valve actuator. Background Technology

[0002] In industrial pipeline systems, pneumatic control ball valves play a crucial role in flow control, and the performance of their actuators directly affects the control effect and reliability of the ball valves. Traditional pneumatic control ball valve actuators have several problems. On the one hand, in terms of valve opening control, the precision often fails to meet the high-precision flow regulation requirements of modern industry. Due to the lack of precise angle measurement and feedback mechanisms, the actual valve opening deviates significantly from the expected flow control value, affecting the stability of the production process and the consistency of product quality. On the other hand, when the actuator malfunctions, such as damage to the drive components, traditional devices often cannot perform quick and convenient manual emergency operations. Complex tools and specialized technicians are required for repair and debugging, which not only increases downtime and maintenance costs but may also lead to production accidents due to the inability to restore normal valve operation in a timely manner. Utility Model Content

[0003] To address the problems of insufficient opening control accuracy and difficulty in emergency operation during malfunctions in traditional pneumatic control ball valve actuators, which affect control performance, increase costs, and create potential risks, this application provides a pneumatic control ball valve actuator.

[0004] The pneumatic regulating ball valve actuator provided in this application adopts the following technical solution:

[0005] A pneumatic regulating ball valve actuator includes a ball valve, a bracket mounted on the ball valve, a speed-changing gearbox mounted on the bracket, a drive assembly connected to the input end of the speed-changing gearbox, a cylinder mounted on the bracket, a rotating plate drivenly connected to the output end of the cylinder, a handle mounted at one end of the rotating plate, a locking element mounted at the lower end of the handle, a guide rail mounted on the bracket, and the locking element disposed within the guide rail.

[0006] Preferably, the ball valve includes a housing and a valve stem, the housing being provided with a mounting seat adapted to the bracket, and the valve stem rotating through the housing and the mounting seat.

[0007] Preferably, the transmission gearbox includes a planetary gearbox mounted on a bracket, the lower end of which is provided with an output shaft adapted to the valve stem, the lower end of which is inserted into the valve stem, and an encoder is sleeved on the output shaft.

[0008] Preferably, the upper end of the planetary gearbox is provided with an input shaft, the rotating plate is sleeved on the input shaft, the end of the rotating plate away from the locking member is provided with a sliding groove, a guide rod is movably arranged in the sliding groove, and the guide rod is detachably connected to the movable end of the cylinder.

[0009] Preferably, the locking element includes a screw disposed on the lower side of the rotating plate, and a nut is threaded onto the screw.

[0010] In summary, this application includes the following beneficial technical effects:

[0011] By using a combination of a transmission gearbox, drive assembly, encoder, guide rail, and locking components, the cylinder extension and retraction drive the rotating plate to rotate the input shaft, which in turn rotates the output shaft. The encoder precisely measures the rotation angle of the valve stem, ensuring valve control accuracy. In case of a rotating plate malfunction, the guide rod can be removed, and the valve opening and closing can be adjusted by rotating the handle. After adjustment, the nut is tightened to lock the position. Compared with existing technologies, this method offers higher control accuracy, greater operational flexibility, and better fault response capabilities. Attached Figure Description

[0012] Figure 1 This is a first-view three-dimensional structural diagram of an embodiment of the application;

[0013] Figure 2 This is a second-view perspective three-dimensional structural diagram of an embodiment of the application;

[0014] Figure 3 This is a third-view stereoscopic structural diagram of an embodiment of the application.

[0015] Explanation of reference numerals in the attached drawings: 1. Ball valve; 101. Housing; 102. Valve stem; 2. Bracket; 3. Gearbox; 301. Planetary gearbox; 302. Input shaft; 303. Output shaft; 4. Drive assembly; 401. Rotating plate; 402. Cylinder; 403. Guide rod; 404. Handle; 5. Encoder; 6. Guide rail; 7. Screw; 8. Nut. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0017] This application discloses a pneumatic regulating ball valve actuator. (Refer to...) Figure 1-3 A pneumatic regulating ball valve actuator is mainly composed of a ball valve 1, a bracket 2, a speed gearbox 3, a drive assembly 4, an encoder 5, a guide rail 6, and a locking component. Each component enables efficient and precise control of the ball valve, while also possessing good fault handling capabilities and stable operating performance. This meets the stringent requirements of industrial pipeline systems for fluid control and enhances the reliability and safety of the system.

[0018] Reference Figure 1 As a key component in fluid control, the ball valve 1's body 101 and stem 102 are made of high-quality metal materials (such as stainless steel or carbon steel). The material selection is based on the properties of the fluid in the pipeline and the working pressure, ensuring that the ball valve has excellent corrosion resistance and sufficient strength to withstand fluid pressure and erosion, and can operate stably in complex working environments for a long time. The sealing structure between the stem 102 and the body 101 uses high-performance sealing materials (such as PTFE or rubber sealing rings). This sealing design effectively prevents fluid leakage, ensures the sealing of the pipeline system, avoids energy waste, environmental pollution, and production accidents caused by leakage, and ensures the safety and stability of industrial production. The mounting seat on the body 101 and the bracket 2 are precisely matched, using precision machining technology to ensure that the dimensional accuracy and geometric tolerances of the connection parts meet the requirements. This allows the bracket 2 to be firmly installed on the ball valve 1 without loosening or displacement during long-term operation, providing a stable support foundation for the entire actuator and ensuring the accuracy and reliability of valve control.

[0019] Reference Figure 3 The bracket 2 is made of high-strength alloy steel, and its structural design fully considers the stability of its connection with the ball valve 1 and other components, as well as the ease of installation. The bracket 2 not only provides a reliable mounting platform for components such as the gearbox 3 and drive assembly 4, but also, through its tight connection with the ball valve 1, stably transmits the forces of each component to the ball valve 1, ensuring smooth operation of the valve during opening, closing, and regulation. Its high-strength material and reasonable structural design can withstand various forces generated by the actuator during operation, preventing deformation or damage to the bracket 2, thereby ensuring the normal operation and service life of the entire actuator.

[0020] Reference Figure 2 The planetary gearbox 301 of the transmission gearbox 3 is manufactured with high-precision gears. The gear tooth profile, pitch, and surface hardness are optimized to ensure good transmission efficiency and accuracy, while reducing energy loss and noise during transmission. This high-precision gear transmission accurately converts the rotation of the input shaft 302 into the rotation of the output shaft 303, thereby achieving precise control of the valve stem 102, improving valve control accuracy, and meeting the needs of precise fluid flow regulation in industrial production. The input shaft 302 and output shaft 303 are reliably connected to the planetary gearbox 301 via key or interference fit. This connection method ensures stable and reliable transmission between the shaft and the gearbox, effectively transmitting torque and preventing slippage or loosening during transmission, thus ensuring accurate and timely valve control. Simultaneously, proper lubrication and protection of the shafts prevent rust and wear, extending their service life, reducing equipment maintenance costs and downtime, and improving production efficiency.

[0021] Reference Figure 2 The cylinder 402 in the drive assembly 4 is selected according to the driving force and speed required by the actuator, and its piston rod stroke and diameter meet the requirements of valve opening adjustment. The cylinder 402 is manufactured with excellent craftsmanship, and its internal seals are made of high-quality rubber material to ensure good sealing performance, prevent gas leakage, and ensure that the cylinder 402 can stably output power to drive the rotating plate 401 to rotate, thereby controlling the ball valve 1. The rotating plate 401 is made of high-strength metal material, and its fit with the input shaft 302 is precise. Suitable bearings or bushings are used to ensure flexible and secure rotation, accurately transmitting the power of the cylinder 402 to the input shaft 302, achieving smooth valve opening and closing and precise adjustment of the opening degree. The handle 404 is designed for easy gripping and force application by the operator, and its connection with the rotating plate 401 is robust and reliable (e.g., by welding or threaded connection). In the event of a malfunction in the cylinder 402 or other drive components, the operator can easily grip the handle 404 to rotate the rotating plate 401, thereby driving the valve stem 102 to rotate and complete the valve opening and closing adjustment operation. This improves the actuator's fault-response capability and ensures that the basic operational functions of the pipeline system are not affected in emergency situations. The guide rod 403 is made of a high-hardness metal material, and its fit with the piston rod of the cylinder 402 and the slide groove of the rotating plate 401 is highly precise. This ensures reliable transmission during normal operation, allowing the cylinder 402 to accurately drive the rotating plate 401 to rotate. It also allows for easy disassembly when manual operation is required, facilitating quick switching to manual emergency operation mode and enhancing the operational flexibility and reliability of the actuator.

[0022] Reference Figure 1 Encoder 5 is a high-precision, high-resolution rotary encoder, installed concentrically with the rotation axis of valve stem 102 to ensure accurate measurement of the valve stem 102's rotation angle. The encoder 5 is securely connected to bracket 2 or other components, and the signal transmission line uses shielded cable to effectively prevent external electromagnetic interference from affecting the accuracy and stability of the signal. This ensures the control system can acquire the rotation information of valve stem 102 in real time and accurately, thereby achieving precise control of the valve opening. Simultaneously, the encoder 5 is effectively protected against damage from dust, moisture, and mechanical impacts, ensuring its long-term stable operation, improving the accuracy and reliability of valve control, and providing strong support for automated control in industrial production.

[0023] Reference Figure 2The guide rail 6 is a precision-machined arc-shaped metal guide rail with a smooth surface and high straightness and flatness, ensuring that the screw 7 can move and be positioned smoothly within it. After manual operation, the screw 7 can accurately insert into the corresponding hole in the guide rail 6, providing a precise guide and positioning basis for locking the rotating plate 401. The screw 7 and nut 8 use high-strength threaded connectors with a high thread precision grade. When the nut 8 is tightened, it can generate sufficient friction to firmly lock the rotating plate 401 in the required position, ensuring that the valve remains in the required opening state before fault repair, preventing production accidents caused by accidental valve rotation, and improving the safety and stability of industrial production.

[0024] The implementation principle of a pneumatic regulating ball valve actuator in this application embodiment is as follows:

[0025] First, the bracket 2 is securely installed on the mounting base on the housing 101 of the ball valve 1 using bolts or other connecting parts, ensuring a stable and reliable connection between the bracket 2 and the ball valve 1, capable of withstanding various forces exerted by the actuator during operation. Then, the output shaft 303 of the transmission gearbox 3 is precisely connected to the valve stem 102 of the ball valve 1, ensuring coaxiality and transmission accuracy between the two, allowing the valve stem 102 to accurately follow the rotation of the output shaft 303 of the transmission gearbox 3, thus achieving precise control of the opening degree of the ball valve 1.

[0026] Under normal operating conditions, the control system controls the flow rate or valve opening command required by the process to control the flow of compressed air into different chambers of cylinder 402, causing the piston rod of cylinder 402 to extend and retract. The piston rod of cylinder 402 and rotating plate 401 are reliably connected via guide rod 403. When the piston rod extends or retracts, it drives rotating plate 401 to rotate around input shaft 302. The rotation of rotating plate 401 is transmitted to the input shaft 302 of planetary gearbox 301 through its close engagement with input shaft 302. Planetary gearbox 301, according to its internal gear ratio, speeds up the rotation of input shaft 302 and transmits it to output shaft 303. Output shaft 303 drives valve rod 102 to rotate, thereby achieving precise opening, closing, or opening adjustment of ball valve 1. During this process, encoder 5 monitors the rotation angle of valve rod 102 in real time and converts the angle signal into an electrical signal, which is then transmitted to the control system. The control system compares and analyzes the received angle signal with the preset target value, and adjusts the air intake of cylinder 402 and the movement direction of piston rod through a closed-loop control algorithm, thereby achieving high-precision control of the opening degree of ball valve 1 and ensuring that the fluid flow in the pipeline can accurately meet the requirements of the production process.

[0027] When a cylinder 402 malfunctions, the air supply is interrupted, or other emergencies prevent the ball valve 1 from being pneumatically driven, the operator can quickly take manual emergency measures. First, detach the guide rod 403 from the connection between the piston rod of the cylinder 402 and the sliding groove of the rotating plate 401, disengaging the rotating plate 401 from the cylinder 402. Then, the operator holds the handle 404 and manually rotates the rotating plate 401. The rotating plate 401 drives the input shaft 302 and the planetary gearbox 301, thereby rotating the valve stem 102 to manually open, close, or adjust the opening of the ball valve 1. After manual adjustment, to ensure the valve can be stably maintained at its current opening position, the operator moves the screw 7 along the guide rail 6 to the appropriate position, inserting its lower end into the positioning hole on the guide rail 6. Then, the operator uses a tool to tighten the nut 8, pressing the nut 8 firmly onto the guide rail 6. Through the friction between the screw 7 and the nut 8, and the cooperation between the screw 7 and the guide rail 6, the rotating plate 401 is firmly locked in its current position, preventing it from rotating due to external factors. This ensures that the ball valve 1 can be stably maintained in the required working state before the fault is repaired, avoiding production accidents caused by valve malfunction.

[0028] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0029] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pneumatic regulating ball valve actuator, comprising a ball valve (1), characterized in that: The ball valve (1) is provided with a bracket (2), and the bracket (2) is provided with a gearbox (3). The input end of the gearbox (3) is connected to a drive assembly (4). The drive assembly (4) includes a cylinder (402) provided on the bracket (2). The output end of the cylinder (402) is connected to a rotating plate (401). One end of the rotating plate (401) is provided with a handle (404). The lower end of the handle (404) is provided with a locking element. The bracket (2) is also provided with a guide rail (6). The locking element is located inside the guide rail (6).

2. The pneumatic regulating ball valve actuator according to claim 1, characterized in that: The ball valve (1) includes a housing (101) and a valve stem (102). The housing (101) is provided with a mounting seat that is adapted to the bracket (2). The valve stem (102) rotates through the housing (101) and the mounting seat.

3. The pneumatic regulating ball valve actuator according to claim 2, characterized in that: The gearbox (3) includes a planetary gearbox (301) mounted on a bracket (2). The lower end of the planetary gearbox (301) is provided with an output shaft (303) adapted to the valve stem (102). The lower end of the output shaft (303) is inserted into the valve stem (102). An encoder (5) is mounted on the output shaft (303).

4. The pneumatic regulating ball valve actuator according to claim 3, characterized in that: The upper end of the planetary gearbox (301) is provided with an input shaft (302), and the rotating plate (401) is sleeved on the input shaft (302). The end of the rotating plate (401) away from the locking member is provided with a sliding groove, and a guide rod (403) is movably arranged in the sliding groove. The guide rod (403) is detachably connected to the movable end of the cylinder (402).

5. The pneumatic regulating ball valve actuator according to claim 1, characterized in that: The locking component includes a screw (7) disposed on the lower side of the rotating plate (401), and a nut (8) is threaded onto the screw (7).

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