Regulating valve convenient to maintain online

Abstract

The utility model belongs to the technical field of regulating valves, and particularly relates to a regulating valve convenient for online maintenance, which comprises a valve body and a valve cover, a valve seat is arranged in the valve body, a valve rod is mounted on the valve seat, a valve core is arranged at the top end of the valve rod, and a valve seat sleeve is mounted on the valve core. Two valve element sealing rings and a sealing ring spare part which are oppositely arranged are arranged on the valve seat sleeve, a hexagon nut is arranged at the top end of the valve element, the valve seat sleeve is detachably installed on the valve element through the hexagon nut, the two same valve element sealing rings are arranged in the same valve element, one valve element sealing ring makes contact with the valve seat ring, and the other valve element sealing ring makes contact with the sealing ring spare part. And the design and use requirements of the regulating valve are met. And the other valve core sealing ring does not participate in the flow regulation work. The valve element sealing ring is only used as a spare part to be attached inside the valve element, when the valve has faults such as large leakage amount, the two valve element sealing rings on the valve element are exchanged, the leakage problem of the valve can be repaired, the whole valve does not need to be disassembled, maintenance is convenient, and working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of regulating valves, and in particular relates to a regulating valve which is convenient for online maintenance. Background Art

[0002] Control valves are crucial control components in industrial automation systems. Their primary function is to precisely control industrial processes by varying fluid parameters such as flow, pressure, and temperature. A control valve consists of an actuator and a valve body. The actuator is the driving mechanism of the control valve. It generates thrust in response to the signal pressure, causing the push rod to move, thereby actuating the valve core. The valve body is the regulating part of the control valve, directly in contact with the medium. The displacement of the actuator's push rod changes the throttling area of ​​the control valve, achieving the desired flow control. Control valves can be categorized into various types based on their operating principle, including plug-type control valves, suspended control valves, eccentric rotary control valves, and regulating stop-type control valves. Furthermore, depending on the energy source, control valves can be categorized as pneumatic, electric, and hydraulic. Control valves are widely used in various fields, including industrial production, construction, and wastewater treatment. For example, in refineries, chemical plants, and power plants, control valves are required to control the flow and pressure of the medium to ensure the normal operation of production equipment. In the construction industry, regulating valves control the flow of cooling or heating water in central air conditioning systems, thereby regulating temperature. In sewage treatment processes, regulating valves control the flow of disinfectant, evenly adding it to the wastewater to ensure effective disinfection.

[0003] If leakage from a current regulating valve exceeds the specified value, the valve must be disassembled and the valve core or seat must be reworked at a factory before reinstallation. This entire process is time-consuming, resulting in significant downtime and losses for the manufacturer using the valve. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the utility model provides a regulating valve that is easy to maintain online. Two identical valve core sealing rings are made inside the same valve core, and one of the valve core sealing rings is in contact with the valve seat ring, meeting the design and use requirements of the regulating valve. The other valve core sealing ring does not participate in the flow regulation work. It is only attached to the inside of the valve core as a spare part. When the valve has a fault such as a large leakage, the two valve core sealing rings on the valve core are swapped without disassembling the entire valve, which is convenient for maintenance. It solves the problem that if the leakage exceeds the standard, the regulating valve must be removed, and the valve core or valve seat inside the valve must be taken to the factory for reprocessing before it can be reinstalled. The whole process is time-consuming, and for manufacturers using this valve, the downtime is long and the losses are large.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a regulating valve that is convenient for online maintenance, including a valve body and a valve cover, a valve seat is provided in the valve body, a valve stem is installed on the valve seat, a valve core is provided at the top end of the valve stem, a valve seat sleeve is installed on the valve core, two relatively arranged valve core sealing rings and sealing ring spare parts are provided on the valve seat sleeve, a hexagonal nut is provided at the top end of the valve core, and the valve seat sleeve is detachably mounted on the valve core through the hexagonal nut.

[0006] Preferably, a first groove and a second groove are provided at both ends of the valve seat sleeve, and the valve core sealing ring and the sealing ring spare part are respectively installed in the first groove and the second groove.

[0007] Preferably, a water inlet cavity and a water outlet cavity are provided on the valve body, and the valve core separates the water inlet cavity and the water outlet cavity.

[0008] Preferably, a valve seat gasket and a spring washer are installed between the valve seat sleeve and the hexagonal nut.

[0009] Preferably, the valve cover is fixedly connected to the valve body by bolts, and a valve cover sealing gasket is installed between the valve cover and the valve body.

[0010] Preferably, a half block is provided at the top end of the valve stem, and a feedback pin is provided at the top of the half block.

[0011] Preferably, the valve body is provided with a valve positioner, the valve positioner is provided with a feedback rod, the feedback rod is provided with a positioning groove, and the feedback pin is slidably fitted in the positioning groove.

[0012] Preferably, an actuator is provided on the valve body, and a push rod is provided on the actuator, and an output end of the push rod contacts the valve stem and transmits force.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention proposes a regulating valve that is convenient for online maintenance. Two identical valve core sealing rings are made inside the same valve core, one of which is in contact with the valve seat ring, meeting the design and use requirements of the regulating valve. The other valve core sealing ring does not participate in the flow regulation work. It is only attached to the inside of the valve core as a spare part. When the valve has a fault such as a large leakage, it is only necessary to disassemble the valve cover at the bottom of the valve body, start the actuator, open the valve (so that the hexagonal nut is exposed to the lower end face of the valve body), unscrew the nut, swap the two valve core sealing rings on the valve core, and reinstall it to repair the leakage problem of the valve. There is no need to disassemble the entire valve, which is convenient for maintenance. It is not only easy to operate, but also safe and reliable, greatly improving work efficiency.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a control valve that is convenient for online maintenance Figure 1 .

[0016] Figure 2 A three-dimensional diagram of a control valve that is convenient for online maintenance Figure 2 .

[0017] Figure 3 This is a cross-sectional view of a control valve that is convenient for online maintenance.

[0018] Figure 4 The figure is a three-dimensional schematic diagram of a valve core of a regulating valve that is convenient for online maintenance.

[0019] Figure 5 This is a three-dimensional exploded view of the valve core of a control valve that is convenient for online maintenance.

[0020] Figure 6 This is a cross-sectional view of the valve core of a control valve that is convenient for online maintenance.

[0021] In the figure: 1. Valve body; 11. Water inlet cavity; 12. Water outlet cavity; 2. Valve cover; 3. Valve seat; 4. Valve stem; 5. Valve core; 51. Valve seat sleeve; 511. First groove; 512. Second groove; 52. Valve core sealing ring; 53. Spare sealing ring; 54. Hexagonal nut; 55. Valve seat gasket; 56. Spring washer; 6. Valve cover sealing gasket; 7. Half block; 71. Feedback pin; 8. Valve positioner; 81. Feedback rod; 811. Positioning groove; 9. Actuator; 91. Push rod. DETAILED DESCRIPTION

[0022] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are intended to illustrate the present invention but are not intended to limit the scope of the present invention. All other embodiments obtained by persons of ordinary skill in the art without creative effort are intended to fall within the scope of protection of the present invention.

[0023] Combine Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, a regulating valve that facilitates online maintenance includes a valve body 1 and a valve cover 2. The valve body 1 is provided with a valve seat 3, on which a valve stem 4 is mounted. A valve core 5 is provided at the top of the valve stem 4. A valve seat sleeve 51 is mounted on the valve core 5. The valve seat sleeve 51 is provided with two oppositely arranged valve core sealing rings 52 and a sealing ring replacement 53. A hexagonal nut 54 is provided at the top of the valve core 5. The valve seat sleeve 51 is removably mounted on the valve core 5 via the hexagonal nut 54. Specifically, the regulating valve that facilitates online maintenance has a detailed structure and design that ensures efficient and safe online maintenance operations. The valve body 1 is the main body of the regulating valve and provides a stable structural foundation for the entire device. The valve body 1 is made of high-strength, corrosion-resistant materials and can withstand various complex operating environments. Its internal design has been optimized to ensure smooth fluid flow and reduce resistance. The valve cover 2 fits tightly with the valve body 1, forming a closed space that protects the internal components of the valve from external environmental influences. The valve seat 3, located in the valve body 1, is a key component of the regulating valve. It ensures a complete seal with the valve core 5 in the closed position, preventing fluid leakage. The material of the valve seat 3 is carefully selected to ensure both hardness and a certain degree of elasticity to withstand the repeated friction of the valve core 5. The valve stem 4 connects the valve core 5 to the operating mechanism. It extends through the valve body 1 and the bonnet 2, with one end connected to the valve core 5 and the other to the external operating mechanism. The valve stem 4 is designed with strength and stability in mind, ensuring it will not bend or break during operation. The valve core 5 is the core component of the regulating valve, directly controlling the flow and flow rate of the fluid. The valve seat sleeve 51 is mounted on the valve core 5 to seal with the valve seat 3. The shape and dimensions of the valve core 5 are precisely calculated to ensure smooth and unimpeded movement during opening and closing. The valve seat sleeve 51 is equipped with two opposing valve core sealing rings 52 and a spare sealing ring 53. The valve core sealing ring 52 is a key component for ensuring a good seal between the valve core 5 and the valve seat 3. When the valve core 5 contacts the valve seat 3, the valve core seal 52 is compressed and deformed, forming a tight seal. The spare seal 53 is designed to allow for quick replacement of the valve core seal 52 if it becomes worn or damaged, ensuring continued stable operation of the control valve. To facilitate online maintenance and replacement of components such as the valve seat sleeve 51 and seal, a hexagonal nut 54 is installed at the top of the valve core 5. By rotating the hexagonal nut 54, the valve seat sleeve 51 can be easily removed from the valve core 5 for maintenance or replacement. If the valve exhibits a malfunction such as excessive leakage, simply remove the valve cover 2 from the valve body 1, activate the actuator 9, open the valve (exposing the hexagonal nut 54 to the lower end of the valve body 1), remove the hexagonal nut 54, flip the valve seat sleeve 51 on the valve core 5, swap the valve core seal 52 with the spare seal 53, and reinstall it. This eliminates the need to disassemble the entire valve, facilitating maintenance. This design significantly simplifies the maintenance process and improves work efficiency.In summary, this online-maintenance-friendly control valve, through optimized design and carefully selected materials, ensures its stability and reliability in a variety of complex environments. Furthermore, its unique maintenance design makes online maintenance quick and easy, effectively reducing maintenance costs and time.

[0024] Combine Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the valve seat sleeve 51 is provided with a first groove 511 and a second groove 512 at each end. The valve core sealing ring 52 and the spare sealing ring 53 are installed in the first groove 511 and the second groove 512, respectively. Specifically, the first groove 511 and the second groove 512 are provided at each end of the valve seat sleeve 51. These two grooves are designed to install and secure the valve core sealing ring 52 and the spare sealing ring 53. The groove at one end of the valve seat sleeve 51 is specifically designed for the valve core sealing ring 52. The valve core sealing ring 52 is a key component that ensures a tight seal between the valve core 5 and the valve seat 3. When the valve core 5 is closed, the valve core sealing ring 52 comes into close contact with the valve seat 3, achieving a reliable seal through its elasticity and deformability. The size and shape of the first groove 511 match the valve core sealing ring 52, ensuring that it is securely installed in the first groove 511 and preventing it from shifting or falling out under the impact of high-pressure or high-speed fluid. The spare sealing ring 53 is installed in the second groove 512 at the other end of the valve seat sleeve 51. The spare seal ring 53 is a backup sealing component for the valve seat sleeve 51. When the valve core seal ring 52 needs to be replaced due to wear or damage, the valve seat sleeve 51 can be quickly flipped and swapped to restore the sealing performance of the control valve. This design greatly shortens maintenance time and improves work efficiency. Furthermore, because the spare seal ring 53 remains integrated with the valve seat sleeve 51, the risk of installation errors or leakage during replacement is avoided. In summary, the first groove 511 and second groove 512 of the valve seat sleeve 51 not only ensure the sealing performance of the control valve, but also improve the convenience and efficiency of maintenance through its unique design. This design allows the control valve to maintain good working condition during long-term use, reducing maintenance costs and time costs.

[0025] Combine Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the valve body 1 is provided with a water inlet cavity 11 and a water outlet cavity 12, and the valve core 5 separates the water inlet cavity 11 from the water outlet cavity 12. Specifically, the water inlet cavity 11 and the water outlet cavity 12 are specially designed on the valve body 1. These two cavities are the key parts of the valve to achieve fluid control. The water inlet cavity 11 is located on one side of the valve body 1 and is the main channel for the fluid to enter the valve. When the valve is in the open state, the channel between the water inlet cavity 11 and the water outlet cavity 12 is opened, and the fluid can flow smoothly from the water inlet cavity 11 to the water outlet cavity 12, thereby completing the fluid transportation. The design of the water inlet cavity 11 takes into account factors such as the flow rate, flow velocity and pressure of the fluid, ensuring that the fluid can maintain a stable state when entering the valve, providing a good foundation for subsequent fluid control. The water outlet cavity 12 is located on the other side of the valve body 1 and is the main channel for the fluid to flow out of the valve. Similar to the water inlet cavity 11, the design of the water outlet cavity 12 also takes into account factors such as the flow rate, flow velocity and pressure of the fluid. When the valve is closed, the channel between the water outlet cavity 12 and the water inlet cavity 11 is cut off, and the fluid cannot flow from the water inlet cavity 11 into the water outlet cavity 12, thereby realizing the fluid cutoff function. The design of the water outlet cavity 12 also takes into account issues such as fluid discharge and recovery, ensuring that the fluid can be completely cut off when the valve is closed to avoid fluid leakage or backflow. The valve core 5 is one of the core components of the regulating valve, which is located between the water inlet cavity 11 and the water outlet cavity 12. The valve core 5 changes the size or position of the channel between the water inlet cavity 11 and the water outlet cavity 12 by moving up and down or rotating, thereby achieving control of the fluid. When the valve is closed, the valve core 5 completely separates the water inlet cavity 11 and the water outlet cavity 12, ensuring that the fluid cannot flow from the water inlet cavity 11 into the water outlet cavity 12. When the valve is open, the valve core 5 allows fluid to flow from the inlet chamber 11 into the outlet chamber 12, and can adjust the fluid flow rate and flow rate as needed. In summary, the synergistic effect of the inlet and outlet chambers 11, 12, and the valve core 5 on the valve body 1 achieves the fluid control function of the regulating valve. This design ensures stable flow and precise control of fluid in the valve, providing a reliable solution for a variety of fluid control applications.

[0026] Combine Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, a valve seat gasket 55 and a spring washer 56 are installed between the valve seat sleeve 51 and the hexagonal nut 54. Specifically, the valve seat gasket 55 and the spring washer 56. The introduction of these two components not only enhances the sealing and stability of the valve, but also optimizes its maintenance and operation process to a certain extent. The valve seat gasket 55 is located between the valve seat sleeve 51 and the hexagonal nut 54. Its main function is to enhance the sealing between the valve seat sleeve 51 and the valve core 5. When the valve is closed, the valve seat gasket 55 can effectively prevent fluid from leaking from the tiny gap between the valve seat sleeve 51 and the valve core 5, ensuring the sealing performance of the valve. The valve seat gasket 55 is usually made of a material with good elasticity, corrosion resistance, and high temperature resistance to ensure stable sealing performance under various operating conditions. The installation position of the valve seat gasket 55 is precisely designed to ensure that it can be evenly stressed and fit tightly between the valve seat sleeve 51 and the valve core 5. During installation, the size and shape of the valve seat gasket 55 must be strictly controlled to ensure it fits perfectly into the pre-set groove, preventing it from loosening or falling out during valve operation. The spring washer 56 is also located between the valve seat sleeve 51 and the hexagonal nut 54. Its primary function is to provide preload and reduce the effects of vibration and shock on the valve. When the valve is closed, the spring washer 56 generates a certain preload through its elastic deformation, allowing the valve seat sleeve 51 to fit more tightly against the valve core 5, thereby improving the valve's sealing performance. Furthermore, during valve operation, the spring washer 56 absorbs and reduces damage caused by vibration and shock, extending the valve's service life. The spring washer 56 is typically made of spring steel with high elasticity and good fatigue resistance to ensure stable elastic deformation over a long period of time. The installation position of the spring washer 56 is also carefully designed to ensure its full effectiveness. During installation, it is important to ensure the correct orientation of the spring washer 56 and to control the preload to avoid excessive pressure or insufficient preload on the valve. In summary, the introduction of the seat gasket 55 and spring washer 56 not only enhances the sealing and stability of the control valve, but also optimizes its maintenance and operation process to a certain extent. The design and installation of these two components are strictly controlled and tested to ensure that they can maintain stable performance under various operating conditions.

[0027] Combine Figure 1 、 Figure 2 and Figure 3As shown, the valve bonnet 2 is fixedly connected to the valve body 1 by bolts, with a bonnet sealing gasket 6 installed between the two. Specifically, the connection method and sealing measures between the valve bonnet 2 and the valve body 1 are extremely important. Bolting the valve bonnet 2 and the valve body 1 together offers advantages such as a strong structure, convenient installation, and easy disassembly. The bolts use a preload to tightly press the valve bonnet 2 against the valve body 1, forming a stable connection. Bolts and corresponding fasteners, such as nuts and washers, are typically made of high-strength, corrosion-resistant materials to ensure stable connection performance even in harsh operating environments. During installation, it is important to ensure consistent tightening torque on the bolts to avoid loose connections or poor sealing due to uneven tightening torque. Furthermore, it is important to ensure proper lubrication and protection of the bolts to reduce the effects of friction and corrosion. The bonnet sealing gasket 6 is installed between the valve bonnet 2 and the valve body 1 to provide a seal. It effectively prevents fluid leakage through the gap between the valve bonnet and the valve body, ensuring the valve's sealing performance. The bonnet gasket 6 is typically made of materials with good elasticity, corrosion resistance, and high temperature resistance. These materials maintain stable performance under various operating conditions, ensuring long-term, stable operation of the valve. The bonnet gasket 6 is typically pre-placed on the sealing surface of the valve body 1 and then tightly fitted to the sealing surface by the compression of the bonnet 2. During installation, it is necessary to ensure that the bonnet gasket 6 is correctly positioned and undamaged, and to avoid excessive pressure or deformation during the compression process. Maintenance and Replacement: Since the bonnet gasket 6 is a wearing part, it needs to be regularly inspected for wear and aging. If the bonnet gasket 6 is found to be damaged, hardened, or deformed, it should be replaced promptly to ensure the valve's sealing performance. In summary, the bolted connection between the bonnet 2 and the valve body 1 and the sealing measures of the bonnet gasket 6 together constitute the stable structure and sealing performance of the regulating valve. This design not only ensures the stable operation of the valve under various operating conditions but also facilitates subsequent maintenance and replacement operations.

[0028] Combine Figure 1 、 Figure 2 and Figure 3As shown, the valve stem 4 is topped with a half block 7, and a feedback pin 71 is mounted on top of the half block 7. Specifically, the half block 7, mounted on the top of the valve stem 4, and the feedback pin 71 play a vital role in the operation and maintenance of the valve. The half block 7 is typically a sturdy and precise component, mounted on the top of the valve stem 4 to provide a stable platform for subsequent connections or installation. Its design allows for a tight fit with the valve stem 4, ensuring stable and accurate force transmission during valve movement. The half block 7 is typically made of high-strength, corrosion-resistant materials to adapt to diverse operating environments. Furthermore, its surface may undergo special treatments, such as polishing or coating, to reduce friction and wear and increase its service life. The feedback pin 71, located on the top of the half block 7, is a crucial signal transmission component. It is typically connected to the valve control system to monitor the valve's opening or position in real time. When the valve opens or closes, the movement of the valve stem 4 drives the half block 7 and the feedback pin 71 to move together. The displacement of the feedback pin 71 is captured by the control system and converted into an electrical signal or other output signal, providing the operator with real-time information on the valve status. The design of the feedback pin 71 focuses on precision and stability, ensuring accurate reflection of the valve's motion. Its installation position and angle are also carefully calculated to ensure stable signal output during valve movement. The half block 7 and the feedback pin 71 together constitute a key component of the valve control system. Their collaborative operation ensures precise control and real-time monitoring of valve movement. During valve operation, the half block 7 transmits movement commands through the valve stem 4, while the feedback pin 71 provides real-time feedback on the valve's motion status. This closed-loop control mechanism significantly improves valve control accuracy and reliability. In summary, the half block 7 at the top of the valve stem 4 and the feedback pin 71 on it play a vital role in the control valve's construction. They not only ensure stable valve movement and precise control, but also provide the operator with real-time information on the valve's status, providing strong support for valve operation and maintenance.

[0029] Combine Figure 1 、 Figure 2 and Figure 3As shown, the valve body 1 is provided with a valve positioner 8. The valve positioner 8 is provided with a feedback rod 81, which is provided with a positioning groove 811. The feedback pin 71 is slidably connected within the positioning groove 811. Specifically, the valve positioner 8 and its interaction with the feedback pin 71 are indispensable components. The valve positioner 8 is a critical component in a regulating valve for precisely controlling the valve position. It is typically connected to the valve control system, receiving commands from the control system and adjusting the valve opening or position accordingly. The valve positioner 8 achieves precise control of the valve position through its internal mechanical structure or electronic components. This control can be continuous or graded, depending on the application requirements of the regulating valve and the design of the control system. The accuracy and stability of the valve positioner 8 are crucial to the proper operation of the valve. It ensures that the valve quickly and accurately reaches the specified position after receiving commands, thereby ensuring the stability and reliability of the entire fluid system. The feedback rod 81 is a key component of the valve positioner 8. It is typically connected to the valve stem 4 or valve core 5 and transmits actual valve position information to the valve positioner 8. The positioning groove 811 is a key feature of the feedback lever 81. It is typically a long, rectangular groove designed to accommodate and constrain the feedback pin 71. This design ensures that the feedback pin 71 can slide stably within the positioning groove 811, thereby accurately transmitting valve position information. The shape, size, and position of the positioning groove 811 are carefully designed to ensure a perfect match with the feedback pin 71 and smooth movement. This compatibility and smoothness are key factors in ensuring that the valve positioner 8 accurately controls the valve position. The feedback pin 71 is a pin-shaped component connected to the half block 7 at the top of the valve stem 4, forming a sliding fit with the positioning groove 811. As the valve stem 4 moves up and down, the feedback pin 71 also slides within the positioning groove 811, transmitting real-time information about the actual valve position to the valve positioner 8. This sliding fit ensures that the feedback pin 71 slides stably and smoothly within the positioning groove 811, preventing inaccurate or ineffective information transmission due to friction, sticking, and other issues. The sliding fit between the feedback pin 71 and the positioning groove 811 also exhibits a certain degree of adaptability. Even with minor deviations or vibrations during valve movement, the feedback pin 71 automatically adjusts its position within the positioning slot 811, ensuring accurate and stable information transmission. In summary, the valve positioner 8 and its interaction with the feedback pin 71 play a crucial role in the construction of the control valve. By precisely controlling valve position, transmitting valve position information in real time, and ensuring accurate and stable information transmission, the valve positioner 8 provides a strong guarantee for the stable operation of the entire fluid system.

[0030] Combine Figure 1 、 Figure 2 and Figure 3As shown, the valve body 1 is provided with an actuator 9, which is equipped with a push rod 91. The output end of the push rod 91 contacts and transmits force to the valve stem 4. Specifically, the actuator 9 and its interaction with the valve stem 4 are an indispensable component. The actuator 9 is a key component in the regulating valve. It is responsible for receiving commands from the control system and converting these commands into mechanical actions to open and close the valve or adjust its position. The type of actuator 9 can be selected based on the specific application scenario and adjustment requirements, such as electric actuators, pneumatic actuators, or hydraulic actuators. The actuator 9 generates a corresponding output force or torque through its internal transmission mechanism and actuator elements (such as motors and cylinders), which propels the push rod 91 in linear or rotational motion. This motion is precisely transmitted to the valve stem 4, thereby achieving precise control of the valve. The push rod 91 serves as a bridge connecting the actuator 9 and the valve stem 4, responsible for transmitting the output force or torque of the actuator 9 to the valve stem 4. The push rod 91 is usually designed to move in a linear manner to ensure that the mutual contact and force transmission with the valve stem 4 can generate effective thrust or pull. The material and size selection of the push rod 91 must take into account factors such as its bearing capacity, rigidity and wear resistance. It is usually made of high-strength, corrosion-resistant materials to ensure stable performance under long-term, high-load working conditions. The contact portion between the push rod 91 and the valve stem 4 is usually designed with corresponding guiding and positioning structures to ensure the relative position between the two is stable and reduce errors caused by vibration or impact. The output end of the push rod 91 contacts the valve stem 4 and transmits force, which is a key step in achieving valve control. When the actuator 9 receives instructions from the control system, it drives the push rod 91 to perform corresponding movement. This movement is transmitted to the valve stem 4 through the output end of the push rod 91, causing it to produce corresponding displacement or rotation. The method of mutual contact and force transmission can be direct contact or indirect transmission. In a direct contact configuration, the output end of the push rod 91 directly contacts the valve stem 4 and applies force. In an indirect transmission configuration, the push rod 91 may be connected to the valve stem 4 via a transmission mechanism (such as a lever or gears) to achieve force transmission and amplification. The precision and stability of mutual contact and force transmission are crucial to the control performance of the valve. To ensure this, the push rod 91 and valve stem 4 must be precisely aligned, and the contact surface must be smooth, flat, and free of impurities. Furthermore, the connection between the push rod 91 and valve stem 4 requires regular inspection and maintenance to ensure proper operation. In summary, the actuator 9 and its interaction with the push rod 91 and valve stem 4 constitute the core component of the control valve control system. By precisely controlling the output force and torque of the actuator 9 and optimizing the connection between the push rod 91 and valve stem 4 and the precision of mutual contact and force transmission, precise valve control can be achieved, ensuring stable operation of the entire fluid system.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A regulating valve convenient for online maintenance, comprising a valve body (1) and a valve cover (2), wherein a valve seat (3) is provided in the valve body (1), and a valve stem (4) is mounted on the valve seat (3), characterized in that: A valve core (5) is provided at the top end of the valve stem (4), a valve seat sleeve (51) is installed on the valve core (5), two valve core sealing rings (52) and a sealing ring spare part (53) are provided on the valve seat sleeve (51) and are arranged opposite to each other. A hexagonal nut (54) is provided at the top end of the valve core (5), and the valve seat sleeve (51) is detachably installed on the valve core (5) through the hexagonal nut (54).

2. The regulating valve convenient for online maintenance according to claim 1, characterized in that: A first groove (511) and a second groove (512) are provided at both ends of the valve seat sleeve (51), and the valve core sealing ring (52) and the sealing ring spare part (53) are respectively installed in the first groove (511) and the second groove (512).

3. The regulating valve convenient for online maintenance according to claim 2, characterized in that: A water inlet cavity (11) and a water outlet cavity (12) are provided on the valve body (1), and the valve core (5) separates the water inlet cavity (11) from the water outlet cavity (12).

4. The regulating valve convenient for online maintenance according to claim 3, characterized in that: A valve seat gasket (55) and a spring gasket (56) are installed between the valve seat sleeve (51) and the hexagonal nut (54).

5. The regulating valve convenient for online maintenance according to claim 4, characterized in that: The valve cover (2) and the valve body (1) are fixedly connected by bolts, and a valve cover sealing gasket (6) is installed between the valve cover (2) and the valve body (1).

6. The regulating valve convenient for online maintenance according to claim 5, characterized in that: A Hough block (7) is provided at the top end of the valve stem (4), and a feedback pin (71) is provided at the top end of the Hough block (7).

7. The regulating valve convenient for online maintenance according to claim 6, characterized in that: The valve body (1) is provided with a valve positioner (8), the valve positioner (8) is provided with a feedback rod (81), the feedback rod (81) is provided with a positioning groove (811), and the feedback pin (71) is slidably fitted in the positioning groove (811).

8. The regulating valve convenient for online maintenance according to claim 7, characterized in that: An actuator (9) is provided on the valve body (1), and a push rod (91) is provided on the actuator (9). The output end of the push rod (91) contacts the valve stem (4) and transmits force.

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