Electric flow regulating valve with clutch system

Abstract

The invention relates to an electric flow regulating valve with a clutch system and belongs to the technical field of valves.The electric flow regulating valve with the clutch system comprises a valve body, a valve element, a clutch shell, a driving mechanism and the clutch system, a valve cavity is formed in the valve body, the valve body is provided with a first channel and a second channel, the clutch shell is arranged on the valve body, and the driving mechanism is arranged on the clutch shell. The clutch system is arranged in the clutch shell and used for enabling the driving mechanism and the clutch shell to be relatively fixed when the valve element and the second channel are in a disengaged state. And after the valve core blocks the second channel, when the driving mechanism continuously drives the valve core to screw in, the clutch system unlocks the driving mechanism. The adjusting valve has the advantages that after the valve element moves to the target position of the closed state, if the driving mechanism continues to drive the valve element to be screwed in the direction close to the second channel, unexpected mechanical interference generated by overshoot of the valve element and the internal structure of the valve body can be avoided, and the service life of the adjusting valve is guaranteed.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to an electric flow regulating valve with a clutch system. Background Technology

[0002] A flow control valve is a device that controls the flow rate or pressure of fluid in a pipeline by changing the flow area between the valve core and the valve body. Currently, flow control valves are mainly driven manually, electrically, or pneumatically, and are widely used in various industrial automation systems to meet the fluid medium control requirements of different processes.

[0003] In electric flow control valves, the movement of the valve core typically relies on a motor drive. A transmission mechanism converts the rotational motion into linear motion of the valve core, thereby adjusting the relative position between the valve core and the valve body to regulate flow. However, in actual use, after the valve core reaches the target closed position under motor drive, it is prone to overshoot due to inertia or delayed control signal feedback. This can cause unexpected mechanical interference between the valve core and the internal structure of the valve body, leading to a reduction in the overall lifespan of the control valve. Summary of the Invention

[0004] In order to prevent the valve core from overshooting and causing unexpected mechanical interference with the internal structure of the valve body when the drive mechanism continues to drive the valve core toward the direction closer to the second channel after the valve core has moved to the target position of the closed state, and to ensure the service life of the regulating valve, this application provides an electric flow regulating valve with a clutch system.

[0005] The electric flow regulating valve with a clutch system provided in this application adopts the following technical solution: An electric flow regulating valve with a clutch system, comprising: The valve body has a valve cavity inside, and the valve body has a first channel and a second channel, both of which are connected to the valve cavity. The valve core is movably inserted into the valve cavity of the valve body. The valve core is used to move toward or away from the second channel to open or block the second channel. A clutch housing, which is disposed on the valve body; A drive mechanism, rotatably connected to the clutch housing, is used to drive the valve core to move toward or away from the second channel; The clutch system is disposed within the clutch housing and is used to fix the drive mechanism relative to the clutch housing when the valve core is disengaged from the second channel; when the drive mechanism continues to drive the valve core to rotate after the valve core blocks the second channel, the clutch system releases the lock on the drive mechanism.

[0006] Preferably, the valve core is threaded through the valve cavity of the valve body, the drive mechanism has a drive shaft, the valve core is slidably connected to the drive shaft of the drive mechanism, and the relative sliding direction of the valve core and the drive shaft is parallel to the axial direction of the valve core.

[0007] Preferably, the clutch system includes a clutch seat, balls, a limiting plate, and an elastic element. The clutch seat is sleeved on the drive mechanism housing and is concentrically arranged with the drive shaft. The clutch seat has multiple limiting protrusions arranged sequentially along its circumference, and limiting grooves are formed between adjacent limiting protrusions. Multiple balls are provided, and each ball is movably inserted into the clutch housing. The balls are used to engage with the limiting grooves. The limiting plate is slidably disposed within the clutch housing, and the balls are located between the limiting plate and the clutch seat. The limiting plate abuts against the side of the balls away from the clutch seat. The elastic element is disposed within the clutch housing and is used to push the limiting plate against the balls. The elastic force of the elastic element is greater than the rotational friction between the valve core and the valve cavity. When the valve core opens the second channel, the balls are located within the limiting grooves.

[0008] Preferably, the elastic element includes a spring for pushing the limiting plate to abut against a plurality of balls, one end of the spring abutting against the limiting plate and the other end abutting against the valve body.

[0009] Preferably, a signal needle is provided on the clutch housing, the limiting plate is connected to an external wire, and the signal needle, the drive mechanism, and the wire connected to the limiting plate are all electrically connected to an external control system. When the ball is located in the limiting groove, the signal needle abuts against the limiting plate. When the ball abuts against the limiting protrusion, the limiting plate disengages from the signal needle, and the external control system receives a circuit breaker signal to drive the drive mechanism to de-energize.

[0010] Preferably, the limiting plate has an extension that extends out of the clutch housing, and the clutch housing has a notch that slides with the extension.

[0011] Preferably, the drive mechanism includes a drive motor and a reducer, the housing of the drive motor is connected to the housing of the reducer, the input shaft of the reducer is coaxially connected to the output shaft of the drive motor, the housing of the reducer is rotatably disposed within the clutch housing, and the drive shaft is the output shaft of the reducer.

[0012] Preferably, a first bearing is installed inside the clutch housing, the housing of the reducer is connected to the inner ring of the first bearing, and a retaining ring is provided inside the clutch housing. The retaining ring abuts against the outer ring of the first bearing to fix the outer ring of the first bearing inside the clutch housing.

[0013] Preferably, the regulating valve further includes a slip ring and a connecting body, the connecting body being connected to the housing of the drive motor, and the rotor of the slip ring being connected to the connecting body.

[0014] Preferably, a connecting plate is provided between the clutch housing and the valve body, the valve core extends movably through the connecting plate into the clutch housing, and a sealing ring is embedded between the connecting plate and the valve body, the sealing ring abutting against the outer wall of the valve core.

[0015] In summary, this application includes the following beneficial technical effects: 1. During operation, connect the pipeline to the first and second channels of the valve body. Use the first or second channel as the inlet channel as needed. Then start the drive mechanism. The drive mechanism drives the valve core to rotate gradually away from the second channel, gradually opening the second channel. At this time, the clutch system keeps the drive mechanism and clutch housing relatively fixed, so that the drive mechanism can drive the valve core to move normally. The medium entering from the first or second channel flows out through the gap between the valve core and the valve body. The valve core position is adjusted by the drive mechanism, thereby adjusting the size of the gap between the valve core and the valve body to control the flow rate and realize the normal operation of the regulating valve. 2. When the valve core is fully closed, i.e., just blocking the second channel, if the drive mechanism continues to drive the valve core toward the second channel due to inertia or delayed control signal feedback, the clutch system releases the lock on the drive mechanism. Since the valve core will not move forward due to the obstruction, the drive mechanism housing will reverse relative to the clutch housing under the reaction force. Furthermore, the external control system will cut off the power to the drive mechanism, thus preventing the valve core from continuing to move toward the second channel. This helps to avoid unintended mechanical interference between the valve core overshoot and the internal structure of the valve body, ensuring the service life of the control valve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 2 This is a cross-sectional view of the overall structure of an embodiment of this application.

[0018] Figure 3 This is an exploded view of the overall structure of an embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the overall structure of the clutch housing in an embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the overall internal structure of the clutch housing after it has been hidden in the embodiments of this application.

[0021] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Valve cavity; 3. First channel; 4. Second channel; 5. Valve core; 6. Clutch housing; 7. Drive mechanism; 71. Drive motor; 72. Reducer; 8. Drive shaft; 9. Clutch seat; 10. Ball bearing; 11. Limiting plate; 12. Limiting protrusion; 13. Limiting groove; 14. Spring; 15. Signal needle; 16. Extension; 17. Notch; 18. First bearing; 19. Retaining ring; 20. Slip ring; 21. Connecting body; 22. Connecting plate; 23. Sealing ring; 24. Conical head; 25. Connecting hole; 26. First mounting cavity; 27. Second mounting cavity; 28. Second bearing; 29. ​​Separator; 30. Through hole. Detailed Implementation

[0022] The following combination Figures 1-5 This application will be described in further detail.

[0023] This application discloses an electric flow regulating valve with a clutch system. (Refer to...) Figure 1 and Figure 2 The electric flow regulating valve with clutch system includes a valve body 1, a valve core 5, a clutch housing 6, a drive mechanism 7, and a clutch system. The valve body 1 has a rectangular cross-section and a valve cavity 2 inside. The valve body 1 has a first channel 3 and a second channel 4, both of which are connected to the valve cavity 2. Specifically, the first channel 3 and the second channel 4 are located on two adjacent surfaces of the valve body 1, that is, the axial direction of the first channel 3 is perpendicular to the axial direction of the second channel 4.

[0024] Reference Figure 1 and Figure 2 The valve core 5 is movably inserted into the valve cavity 2 of the valve body 1, and extends out of the valve body 1 on the side away from the second channel 4. The valve core 5 is used to move towards or away from the second channel 4 to open or block the second channel 4. When the valve core 5 blocks the second channel 4, the valve is closed; when the valve core 5 opens the second channel 4, the valve is opened. Further, the length direction of the valve core 5 is parallel to the axial direction of the second channel 4. A connecting hole 25 connects the valve cavity 2 and the second channel 4. The end of the valve core 5 near the second channel 4 has a conical head 24. The diameter of the conical head 24 increases towards the direction away from the second channel 4. The conical head 24 is used to cooperate with the connecting hole 25 to open and close the connecting hole 25. The minimum diameter of the conical head 24 is smaller than the inner diameter of the connecting hole 25.

[0025] Reference Figure 1 and Figure 2The clutch housing 6 is fixedly connected to the valve body 1, and the clutch housing 6 is located on the side of the valve body 1 away from the second channel 4. The end of the valve core 5 away from the valve body 1 extends movably into the clutch housing 6. The housing of the drive mechanism 7 is rotatably connected to the clutch housing 6. The rotation axis of the drive mechanism 7 is parallel to the length direction of the valve core 5. The drive mechanism 7 is used to drive the valve core 5 to rotate in a direction closer to or away from the second channel 4. The clutch system is set inside the clutch housing 6. The clutch system is used to fix the drive mechanism 7 and the clutch housing 6 relative to each other when the valve core 5 opens the second channel 4. When the valve core 5 blocks the second channel 4, and the drive mechanism 7 continues to drive the valve core 5 to rotate in a direction closer to the second channel 4, the clutch system releases the lock on the drive mechanism 7.

[0026] In the initial state, the valve core 5 blocks the connection hole 25, that is, blocks the second channel 4. At this time, the clutch system fixes the drive mechanism 7 and the clutch housing 6 relatively. During operation, the pipeline is connected to the first channel 3 and the second channel 4 of the valve body 1. The first channel 3 or the second channel 4 can be used as the inlet channel as needed, and the second channel 4 or the first channel 3 as the outlet channel. In this embodiment, the first channel 3 is used as the medium inlet channel. Then, the drive mechanism 7 is started. The drive mechanism 7 drives the valve core 5 to gradually rotate in a direction away from the second channel 4, so that the second channel 4 gradually opens. The medium entering from the first channel 3 flows out through the gap between the valve core 5 and the valve body 1. During this process, the clutch system always keeps the drive mechanism 7 and the clutch housing 6 relatively fixed, so that the drive mechanism 7 can normally drive the valve core 5 to rotate. By adjusting the position of the valve core 5 through the drive mechanism 7, the size of the gap between the valve core 5 and the valve body 1 is adjusted to control the flow rate and realize the normal operation of the regulating valve.

[0027] When the valve core 5 is closed, i.e., when the valve core 5 moves to the preset position of blocking the connection hole 25, the gap between the valve core 5 and the inner wall of the valve body 1 is zero. The preset position of the valve core 5 blocking the connection hole 25 and the second channel 4 refers to the state where the valve core 5 just blocks the connection hole 25. If, at this time, due to inertia or a delayed control signal feedback, the drive mechanism 7 continues to drive the valve core 5 towards the second channel 4, the lock on the drive mechanism 7 is released through the clutch system. Because the resistance to the valve core 5 moving towards the second channel 4 is greater than the rotational friction between the drive mechanism 7 housing and the clutch housing 6, the housing of the drive mechanism 7 reverses relative to the clutch housing 6 under the reaction force. Furthermore, the drive mechanism 7 is de-energized through the external control system, thus preventing the valve core 5 from being forcibly moved towards the second channel 4. This helps avoid unintended mechanical interference between the valve core 5 and the internal structure of the valve body 1, ensuring the service life of the regulating valve. Overshoot refers to the valve core 5 continuing to move closer to the second channel 4 after being in the closed state, causing the conical head 24 on the valve core 5 to mechanically interfere with the internal structure of the valve body 1.

[0028] Reference Figure 2 To achieve the movable cooperation between the valve core 5 and the valve body 1, the valve core 5 is threaded through the valve cavity 2 of the valve body 1. Specifically, the inner wall of the valve cavity 2 has a threaded section that mates with the threaded section of the valve core 5. The drive mechanism 7 has a drive shaft 8, and the valve core 5 is slidably connected to the drive shaft 8 of the drive mechanism 7. The relative sliding direction between the valve core 5 and the drive shaft 8 is parallel to the axial direction of the valve core 5, so that when the drive shaft 8 rotates, it drives the valve core 5 to rotate synchronously. At the same time, the valve core 5 engages with the threaded section of the inner wall of the valve cavity 2 to move axially, so that the forward or reverse rotation of the drive shaft 8 can drive the valve core 5 to rotate while moving towards or away from the second channel 4.

[0029] Reference Figure 2 Furthermore, to improve the cooperation effect between the valve core 5 and the drive shaft 8, a sliding groove (not shown in the figure) is provided on the valve core 5 to slide and cooperate with the drive shaft 8. Two guide blocks (not shown in the figure) are fixed relative to each other on the outer wall of the drive shaft 8. A guide groove (not shown in the figure) is provided relative to each other on the inner wall of the sliding groove to slide and cooperate with the guide blocks, so that the valve core 5 and the drive shaft 8 will not rotate relative to each other.

[0030] Reference Figure 2 To ensure the sealing of the valve chamber 2, a connecting plate 22 is provided between the clutch housing 6 and the valve body 1. Specifically, the clutch housing 6 is welded to the connecting plate 22, and the connecting plate 22 is fixed to the valve body 1 by bolts. The valve core 5 moves through the connecting plate 22 and extends into the clutch housing 6. A sealing ring 23 is embedded between the connecting plate 22 and the valve body 1. The sealing ring 23 abuts against the outer wall of the valve core 5. The sealing ring 23 achieves the sealing between the connecting plate 22 and the valve body 1, and between the valve body 1 and the valve core 5, so that the medium will not flow out from the gap between the valve core 5 and the valve body 1.

[0031] Reference Figure 2 and Figure 3 To facilitate the installation of the drive mechanism 7 and the clutch system, the clutch housing 6 has a first mounting cavity 26 and a second mounting cavity 27. The first mounting cavity 26 is located on the side of the clutch housing 6 closer to the valve body 1. The end of the valve core 5 located outside the valve body 1 extends movably into the first mounting cavity 26. The second mounting cavity 27 is located on the side of the clutch housing 6 away from the valve body 1. The drive mechanism 7 is installed in the second mounting cavity 27. There is a partition 29 between the first mounting cavity 26 and the second mounting cavity 27. The partition 29 has a through hole (not shown in the figure) for the drive shaft 8 of the drive mechanism 7 to rotate through. A second bearing 28 is installed on the inner wall of the through hole. The drive shaft 8 is fixed to the inner ring of the second bearing 28. The drive shaft 8 extends through the through hole into the first mounting cavity 26 and slides with the valve core 5.

[0032] Reference Figure 2To facilitate the rotation of the valve core 5 towards or away from the second channel 4, the drive mechanism 7 includes a drive motor 71 and a reducer 72. The housing of the drive motor 71 is fixedly connected to the housing of the reducer 72. The input shaft of the reducer 72 is coaxially fixedly connected to the output shaft of the drive motor 71. The housing of the reducer 72 is rotatably disposed within the second mounting cavity 27 of the clutch housing 6. The output shaft of the reducer 72 is coaxially aligned with the output shaft of the drive motor 71. Both the housings of the drive motor 71 and the reducer 72 are coaxially aligned with the drive shaft 8, which is the output shaft of the reducer 72. The output shaft of the reducer 72 rotates through the through hole and extends into the first mounting cavity 26 to slide and engage with the valve core 5. The combination of the drive motor 71 and the reducer 72 forms a geared motor, which can drive the valve core 5 to rotate slowly, helping to accurately control the gap between the valve core 5 and the valve body 1.

[0033] During operation, the clutch system keeps the reducer 72 housing and the clutch housing 6 relatively fixed, ensuring that the drive mechanism 7 can drive the valve core 5 to move normally. The flow rate is controlled by adjusting the gap between the valve core 5 and the valve body 1.

[0034] When the valve core 5 is closed, that is, when the valve core 5 moves to the preset position of the sealing connection hole 25, if the drive motor 71 has a tendency to continue to drive the valve core 5 to rotate and move the valve core 5 toward the direction closer to the second channel 4 due to inertia or control signal feedback lag, the locking of the reducer 72 and the housing of the drive motor 71 is released through the clutch system. Under the obstruction, the position of the valve core 5 no longer changes, so that the drive shaft 8 is resisted and cannot continue to rotate relative to the clutch housing 6. Under the reaction force, the housings of the drive motor 71 and the reducer 72 will reverse relative to the clutch housing 6, so that the valve core 5 will not continue to move toward the second channel 4 after it is in place and will not overshoot, which helps to ensure the service life of the regulating valve.

[0035] Reference Figure 2 To facilitate the installation of the reducer 72, a first bearing 18 is fixedly installed in the second mounting cavity 27 of the clutch housing 6. The outer ring of the first bearing 18 is fixed to the clutch housing 6, and the housing of the reducer 72 is fixedly connected to the inner ring of the first bearing 18. A retaining ring 19 is provided in the clutch housing 6, and the retaining ring 19 abuts against the outer ring of the first bearing 18 to fix the outer ring of the first bearing 18 in the clutch housing 6 and prevent the first bearing 18 from moving axially.

[0036] Reference Figure 2 and Figure 3To facilitate the relative fixation of the drive mechanism 7 and the clutch housing 6 when the valve core 5 opens the second channel 4, and to release the lock on the drive mechanism 7 when the drive motor 71 continues to drive the valve core 5 toward the direction closer to the second channel 4 after the valve core 5 just blocks the second channel 4; the clutch system includes a clutch seat 9, a ball bearing 10, a limiting plate 11 and an elastic element. The clutch seat 9 is fixedly sleeved on the housing of the reducer 72. The clutch seat 9 is circular and is concentrically arranged with the drive shaft 8.

[0037] Reference Figure 2 , Figure 3 and Figure 5 Specifically, the clutch seat 9 is located in the second mounting cavity 27. On the side of the clutch seat 9 near the valve body 1, multiple limiting protrusions 12 are integrally formed along its circumference, and limiting grooves 13 are formed between adjacent limiting protrusions 12. Multiple balls 10 are provided, and the multiple balls 10 are distributed at intervals along the circumference of the clutch seat 9. The multiple balls 10 are movably inserted through the partition 29 in the clutch housing 6. In this embodiment, four balls 10 are provided. The partition 29 has through holes 30 corresponding to the balls 10. The balls 10 are movably inserted through the corresponding through holes 30. The thickness of the partition 29 is less than the ball diameter of the balls 10. The balls 10 are used to engage with the limiting grooves 13. In order to facilitate the relative sliding between the limiting protrusions 12 and the balls 10, the limiting protrusions 12 are designed as inclined surfaces on opposite sides along the circumference of the clutch seat 9.

[0038] Reference Figure 2 , Figure 4 and Figure 5 The limiting plate 11 is slidably disposed in the first mounting cavity 26 of the clutch housing 6. The ball bearings 10 are located between the limiting plate 11 and the clutch seat 9. The limiting plate 11 abuts against the side of the multiple balls bearings 10 away from the clutch seat 9. The limiting plate 11 is movably sleeved outside the drive shaft 8. The elastic element is disposed in the first mounting cavity 26 of the clutch housing 6. The elastic element is used to push the limiting plate 11 to abut against the multiple balls bearings 10. The elastic force of the elastic element is greater than the rotational friction between the valve core 5 and the valve cavity 2. When the valve core 5 opens the second channel 4, each ball bearing 10 is located in the limiting groove 13.

[0039] Reference Figure 2 and Figure 4 To facilitate the pushing of the limiting plate 11 to abut against the multiple balls 10, the elastic element includes a spring 14. The spring 14 is movably sleeved on one end of the valve core 5 located in the first mounting cavity 26. One end of the spring 14 abuts against the limiting plate 11, and the other end abuts against the connecting plate 22 on the valve body 1. The spring 14 is always in a compressed state, and the elastic force of the spring 14 is greater than the rotational friction between the valve core 5 and the valve cavity 2.

[0040] In the initial state, the valve core 5 blocks the connection hole 25. At this time, multiple balls 10 are located in the corresponding limiting grooves 13. Under the elastic force of the spring 14, the balls 10 maintain the restriction on the rotation of the clutch seat 9.

[0041] When the regulating valve is working, since the elastic force of the spring 14 is greater than the rotational friction between the valve core 5 and the valve cavity 2, the drive mechanism 7 will preferentially drive the valve core 5 to rotate normally to adjust the position of the valve core 5, thereby adjusting the size of the gap between the valve core 5 and the valve body 1 to control the flow rate. During this process, multiple balls 10 remain in the limiting groove 13.

[0042] When the valve core 5 is closed, and the drive motor 71 continues to drive the drive shaft 8 to output torque, since the valve core 5 is already in contact with the internal structure of the valve body 1, and the resistance of the internal structure of the valve body 1 to the valve core 5 is greater than the elastic force of the spring 14, the housing of the drive motor 71 and the housing of the reducer 72 will, under the reaction force, drive the clutch seat 9 to reverse against the force applied by the spring 14. The inclined surface of the clutch seat 9 slides relative to the corresponding position of the ball 10, causing the limiting protrusion 12 to abut against the ball 10 and move towards the direction closer to the valve body 1. Then, the limiting plate 11 moves towards the direction closer to the valve body 1 to compress the spring 14, causing the ball 10 to move out of the limiting groove 13 and release the lock on the housing of the drive motor 71 and the reducer 72. This ensures that even under conditions of inertia or control signal feedback lag, the valve core 5 will not overshoot and cause mechanical interference, which helps to ensure the service life of the regulating valve.

[0043] Reference Figure 4 and Figure 5 A signal pin 15 is installed on the clutch housing 6. The limiting plate 11 is electrically connected to external wires. The signal pin 15, drive motor 71, reducer 72, and wires electrically connected to the limiting plate 11 are all electrically connected to the external control system. The limiting plate 11 is made of metal, specifically stainless steel or high-strength copper alloy as the base, and the contact area with the signal pin 15 is silver-plated or gold-plated. When the ball 10 is located in the limiting groove 13, the signal pin 15 abuts against the limiting plate 11. At this time, current can flow from the signal pin 15 and flow out through the limiting plate 11, forming a closed loop, indicating that the drive motor 71 and reducer 72 housings are locked. When the ball 10 abuts against the limiting protrusion 12, the limiting plate 11 and signal pin 15 disengage, cutting off the circuit. The external control system receives the circuit cut-off signal, indicating that the drive motor 71 and reducer 72 housings reverse. Then, the external control system drives the drive motor 71 to de-energize. With the cooperation of the signal needle 15 and the limit plate 11, it is possible to promptly determine the situation where the valve core 5 is in position but the drive motor 71 is still working, so as to promptly cut off the power to the drive motor 71.

[0044] Reference Figure 4 and Figure 5The limiting plate 11 has an extension 16 that extends out of the clutch housing 6. The clutch housing 6 has a notch 17 that slides with the extension 16. The design of the extension 16 guides the sliding of the limiting plate 11 and facilitates the extension of the wires that are electrically connected to the limiting plate 11.

[0045] Reference Figure 1 and Figure 2 To facilitate the connection of the drive motor 71 wiring and prevent tangling, the regulating valve also includes a slip ring 20 and a connecting body 21. The connecting body 21 is cylindrical and coaxially connected to the housing of the drive motor 71. The slip ring 20 is existing technology; it is also known as a rotary joint, conductive slip ring, or collector ring. It is a precision electromechanical component whose core function is to transmit electrical power, electrical signals, or fluid media between stationary and rotating parts while maintaining a continuous and stable connection. Specifically, the slip ring 20 includes a rotor and a stator. The rotor of the slip ring 20 is fixedly connected to the connecting body 21, and the stator of the slip ring 20 is connected to an external stationary power supply device.

[0046] When the housing of the drive motor 71 rotates, the connecting body 21 drives the rotor to rotate relative to the stator, which can both adapt to the rotation of the drive motor 71 and ensure stable power transmission.

[0047] The implementation principle of this application embodiment is as follows: In the initial state, the valve core 5 blocks the connection hole 25. At this time, multiple balls 10 are located in the corresponding limiting grooves 13, and the limiting plate 11 abuts against the signal needle 15. Under the elastic force of the spring 14, the multiple balls 10 have an obstructive effect on the rotation of the clutch seat 9.

[0048] During operation, the pipeline is connected to the first channel 3 and the second channel 4 of the valve body 1. The first channel 3 or the second channel 4 can be used as the inlet channel as needed, and vice versa. In this embodiment, the first channel 3 is used as the medium inlet channel. Then, the external control system drives the drive motor 71 to be energized. The drive motor 71 drives the valve core 5 to rotate synchronously through the drive shaft 8 of the reducer 72. The valve core 5 moves axially under the threaded engagement with the valve cavity 2, gradually moving away from the second channel 4, thus opening the second channel 4. Since the elastic force of the spring 14 is greater than the rotational friction between the valve core 5 and the valve cavity 2, the drive motor 71 will preferentially drive the valve core 5 to rotate normally to adjust its position during this process. The housings of the drive motor 71 and the reducer 72 are kept relatively fixed with the clutch housing 6. The medium entering from the first channel 3 flows out through the gap between the valve core 5 and the connecting hole 25. By adjusting the energizing time and rotation direction of the drive motor 71, the gap between the valve core 5 and the connecting hole 25 is adjusted to control the flow rate, thereby realizing the operation of the regulating valve.

[0049] When the valve core 5 is closed, that is, when the conical head 24 of the valve core 5 just blocks the connecting hole 25, the gap between the conical head 24 and the connecting hole 25 is zero. At this time, if the drive motor 71 continues to drive the drive shaft 8 to output torque due to inertia or control signal feedback lag, since the conical head 24 of the valve core 5 has abutted against the internal structure of the valve body 1, and the resistance of the internal structure of the valve body 1 to the valve core 5 is greater than the elastic force of the spring 14, the rotation of the drive shaft 8 is restricted. At this time, the housing of the drive motor 71 and the housing of the reducer 72 will drive the clutch seat 9 to reverse against the force of the spring 14 under the reaction force. The inclined surface of the clutch seat 9 slides relative to the corresponding ball 10, causing the limiting protrusion 12 to abut against the ball 10 and move towards the valve body 1. Then, the limiting plate 11 moves towards the valve body 1, compressing the spring 14. The limiting plate 11 disengages from the signal needle 15, causing the ball bearing 10 to move out of the limiting groove 13. The multiple balls 10 release the lock on the drive motor 71 and the reducer 72 housing, thus preventing the valve core 5 from continuing to move towards the second channel 4. This helps to avoid overshooting after the valve core 5 is closed and causing unexpected mechanical interference with the internal structure of the valve body 1, ensuring the service life of the regulating valve. At the same time, the disengagement of the limiting plate 11 from the signal needle 15 generates a circuit break signal, which de-energizes the drive motor 71 through the external control system, stopping the drive motor 71 from working in time. Furthermore, the clutch system has a simple structure and occupies little space, making it suitable for use in small spaces or small pipeline systems.

[0050] 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. An electric flow regulating valve with a clutch system, characterized in that, include: A valve body (1) is provided with a valve cavity (2) inside the valve body (1). The valve body (1) has a first channel (3) and a second channel (4), and both the first channel (3) and the second channel (4) are connected to the valve cavity (2). Valve core (5), which is movably inserted into the valve cavity (2) of the valve body (1), is used to move toward or away from the second channel (4) to open or block the second channel (4); A clutch housing (6) is disposed on the valve body (1); The drive mechanism (7) is rotatably connected to the clutch housing (6) and is used to drive the valve core (5) to move toward or away from the second channel (4); The clutch system is located inside the clutch housing (6) and is used to fix the drive mechanism (7) relative to the clutch housing (6) when the valve core (5) is disengaged from the second channel (4); when the drive mechanism (7) continues to drive the valve core (5) to rotate after the valve core (5) blocks the second channel (4), the clutch system releases the lock on the drive mechanism (7).

2. The electric flow regulating valve with clutch system according to claim 1, characterized in that: The valve core (5) is threaded through the valve cavity (2) of the valve body (1). The drive mechanism (7) has a drive shaft (8). The valve core (5) is slidably connected to the drive shaft (8) of the drive mechanism (7). The relative sliding direction of the valve core (5) and the drive shaft (8) is parallel to the axial direction of the valve core (5).

3. The electric flow regulating valve with clutch system according to claim 2, characterized in that: The clutch system includes a clutch seat (9), balls (10), a limiting plate (11), and an elastic element. The clutch seat (9) is sleeved on the housing of the drive mechanism (7). The clutch seat (9) is concentrically arranged with the drive shaft (8). The clutch seat (9) has multiple limiting protrusions (12) arranged sequentially along its circumference. A limiting groove (13) is formed between adjacent limiting protrusions (12). Multiple balls (10) are provided. The multiple balls (10) are movably inserted into the clutch housing (6). The balls (10) are used to engage with the limiting grooves (13). The limiting plate (11) is slidably disposed in the clutch housing (6). The ball (10) is located between the limiting plate (11) and the clutch seat (9). The limiting plate (11) and the ball (10) abut against the side away from the clutch seat (9). The elastic element is disposed in the clutch housing (6). The elastic element is used to push the limiting plate (11) to abut against the ball (10). The elastic force of the elastic element is greater than the rotational friction between the valve core (5) and the valve cavity (2). When the valve core (5) opens the second channel (4), the ball (10) is located in the limiting groove (13).

4. The electric flow regulating valve with clutch system according to claim 3, characterized in that: The elastic element includes a spring (14) for pushing the limiting plate (11) to abut against a plurality of balls (10), one end of the spring (14) abutting against the limiting plate (11) and the other end abutting against the valve body (1).

5. An electric flow regulating valve with a clutch system according to claim 3, characterized in that: A signal needle (15) is provided on the clutch housing (6). The limiting plate (11) is connected to an external wire. The signal needle (15), the drive mechanism (7), and the wire connected to the limiting plate (11) are all electrically connected to the external control system. When the ball (10) is located in the limiting groove (13), the signal needle (15) abuts against the limiting plate (11). When the ball (10) abuts against the limiting protrusion (12), the limiting plate (11) disengages from the signal needle (15), and the external control system receives a circuit breaker signal to drive the drive mechanism (7) to disconnect from power.

6. An electric flow regulating valve with a clutch system according to claim 5, characterized in that: The limiting plate (11) has an extension (16) that extends out of the clutch housing (6), and the clutch housing (6) has a notch (17) that slides with the extension (16).

7. An electric flow regulating valve with a clutch system according to claim 2, characterized in that: The drive mechanism (7) includes a drive motor (71) and a reducer (72). The housing of the drive motor (71) is connected to the housing of the reducer (72). The input shaft of the reducer (72) is coaxially connected to the output shaft of the drive motor (71). The housing of the reducer (72) is rotatably disposed in the clutch housing (6). The drive shaft (8) is the output shaft of the reducer (72).

8. An electric flow regulating valve with a clutch system according to claim 7, characterized in that: A first bearing (18) is installed inside the clutch housing (6). The housing of the reducer (72) is connected to the inner ring of the first bearing (18). A retaining ring (19) is provided inside the clutch housing (6). The retaining ring (19) abuts against the outer ring of the first bearing (18) to fix the outer ring of the first bearing (18) inside the clutch housing (6).

9. An electric flow regulating valve with a clutch system according to claim 7, characterized in that: The regulating valve also includes a slip ring (20) and a connecting body (21), the connecting body (21) being connected to the housing of the drive motor (71), and the rotor of the slip ring (20) being connected to the connecting body (21).

10. An electric flow regulating valve with a clutch system according to any one of claims 1-9, characterized in that: A connecting plate (22) is provided between the clutch housing (6) and the valve body (1). The valve core (5) extends through the connecting plate (22) into the clutch housing (6). A sealing ring (23) is embedded between the connecting plate (22) and the valve body (1). The sealing ring (23) abuts against the outer wall of the valve core (5).

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