Electric flow regulating valve with feedback protection function

Abstract

This invention discloses an electric flow regulating valve with feedback protection function, relating to the field of regulating valve technology. It includes a valve body, valve cover, valve stem, and handwheel. The handwheel is mounted on the upper end of the valve stem. The regulating valve includes a valve core and a drive motor. The valve core is mounted on one end of the valve stem and is located within the valve body. The valve cover is mounted on the valve body, and one end of the valve stem passes through the valve cover, with the valve stem and valve cover threaded together. The drive motor is mounted above the valve cover, and the valve stem is connected to the output end of the drive motor. Bolt rings are installed on the inner sides of both flanges of the valve body, used to connect the regulating valve to a pipe or flange. The drive motor drives the valve stem to rotate. The valve body is connected to an external pipe or a flange on the pipe via the bolt rings. The drive motor is an electric motor that operates under the control of a control system. The drive motor drives the valve stem to rotate, thereby raising or lowering the valve core, thus opening or closing the regulating valve or regulating the flow rate.

Description

Technical Field

[0001] This invention relates to the field of regulating valve technology, specifically to an electric flow regulating valve with feedback protection function. Background Technology

[0002] A control valve is a component that uses power to change parameters such as flow rate, pressure, and temperature of a medium. It is widely used in the field of automatic control. Common valve body types include straight-through single-seat, straight-through double-seat, ball, and sleeve types. Based on the energy source, they are also classified as manual control valves, pneumatic control valves, electric control valves, and hydraulic control valves. Control valves play a vital role in modern life.

[0003] Currently, there are many problems with the production process of electric control valves on the market, including the following: 1. Electric control valves cannot be manually adjusted, resulting in the inability to manually control the control valve in the event of a power outage or emergency; 2. They cannot monitor, provide feedback on, or suppress leakage of the control valve, making it impossible for maintenance personnel to know the leakage situation in a timely and accurate manner, and thus preventing maintenance personnel from bringing the correct tools to carry out repairs in a timely manner. Summary of the Invention

[0004] The purpose of this invention is to provide an electric flow regulating valve with feedback protection function to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an electric flow regulating valve with feedback protection function, comprising a valve body, a valve cover, a valve stem, and a handwheel, wherein the handwheel is installed at the upper end of the valve stem, the regulating valve comprises a valve core and a drive motor, wherein the valve core is installed at one end of the valve stem and is located in the valve body, the valve cover is installed on the valve body, one end of the valve stem passes through the valve cover and the valve stem is threadedly connected to the valve cover, the drive motor is installed above the valve cover, the valve stem is connected to the output end of the drive motor, and bolt rings are installed on the inner sides of the two flanges of the valve body, the bolt rings being used to connect the regulating valve to a pipe or flange;

[0006] The drive motor rotates the valve stem. The valve body is connected to an external pipe or a flange on the pipe via bolt rings. The drive motor is an electric motor that operates under the control of the control system. The drive motor drives the valve stem to rotate, thereby raising or lowering the valve core, thus opening or closing the regulating valve or regulating the flow. In this invention, in the event of a power outage, the regulating valve can be opened and closed manually by rotating the handwheel.

[0007] Four connecting rods are installed on the bolt ring. A storage sleeve is installed at one end of each connecting rod. Eight nut plates are rotatably installed at one end of the storage sleeve. A nut cone is installed at the center of the storage sleeve. A compression chamber is provided inside the storage sleeve. A bolt is installed at one end of the nut cone. One end of the bolt is located inside the compression chamber and is fitted with a piston plate. The piston plate is in close contact with the wall of the compression chamber.

[0008] The storage sleeve has a top-out chamber corresponding to the position of each nut plate inside. The top-out chamber is connected to the compression chamber. A top-out rod is slidably installed in each top-out chamber. One end of the top-out rod pushes out of the storage sleeve. A spring is provided between one end of the top-out rod and the top-out chamber.

[0009] A push plate is installed at the other end of the nut cone. The diameter of the push plate is equal to the diameter of the receiving sleeve. The threaded portion of the bolt is threadedly connected to the receiving sleeve. The nut plate is mounted on the receiving sleeve via a pin and a torsion spring. The torsion spring ensures that the nut plate is perpendicular to the plane of the receiving sleeve when no external force is applied. When the nut plate is subjected to a force (i.e., the ejector rod pushes the end face of the nut plate), the nut plate becomes parallel to the plane of the receiving sleeve. The connecting rod is located in the threaded hole of the flange on the valve body, and the receiving sleeve is located on the outside of the flange on the valve body. When the external flange or pipeline is connected to the valve body, the receiving sleeve, along with the nut plate and nut cone, passes through the threaded hole on the external flange. Then, a gasket or spring washer can be installed on the receiving sleeve. Afterward, the installer uses an electric wrench to turn the push plate on the nut cone, causing the push plate to drive the nut cone and bolt to rotate. Since the bolt is threadedly connected to the receiving sleeve, when the bolt rotates, the bolt gradually enters the receiving sleeve, causing the piston plate to continuously compress the air in the receiving chamber. The air continuously enters the ejection chamber and compresses the ejector rod. As the pressure in the ejection chamber continuously increases, the ejector rod gradually pushes the nut plate, causing the nut plate to rotate on the receiving sleeve and change from a state perpendicular to the plane of the receiving sleeve to a state parallel to the plane of the receiving sleeve. When the nut plate is parallel to the plane of the receiving sleeve, the piston plate is attached to the bottom of the compression chamber, the nut cone is embedded in the receiving sleeve, and the push plate is attached to the outside of the eight nut plates, thereby realizing the connection between the valve body and the external flange. To disassemble the valve body from the external flange, simply rotate the push plate in the reverse direction. The bolt ring design enables the connection of the bolt and nut, reducing the number of parts required for connecting the valve body to the external flange. Only the push plate on the nut cone needs to be turned to connect the valve body to the external flange. The bolt ring has four storage sleeves, whose positions are restricted by the bolt holes on the flange. Therefore, when the push plate is turned, the storage sleeves do not rotate with the bolts on the nut cone, reducing the number of installation tools required (such as the wrench used to restrict bolt rotation in conventional bolt-nut connections) and speeding up the entire installation process. A cross groove, slotted groove, or hexagonal groove is provided on the end face of the push plate away from the nut cone.

[0010] The longitudinal section of the nut plate is a right-angled trapezoid, and the cross-section of the nut plate is U-shaped. A slot is formed on the plane of the nut plate near the nut cone, and a semi-cylindrical locking post is provided on the push plate corresponding to each slot. The U-shaped cross-section of the nut plate enhances its structural strength. Simultaneously, when the push plate is attached to the nut plate, the locking posts engage in the slots, and the push plate presses against the nut plate, concentrating the reaction force generated by the external flange between the nut plate and the push plate, preventing the reaction force from deforming or breaking the pin on the nut plate.

[0011] The drive unit includes a protective sleeve, a rotor housing, and a stator housing. One end of the protective sleeve is fixed to the valve cover. The stator housing is slidably installed inside the protective sleeve and rotatably sleeved on the outside of the rotor housing. A stator coil is provided on the inner side of the stator housing, and a rotor magnetic core is provided on the outer side of the rotor housing. A shaft groove is provided at the center of the rotor housing, and a flat key is provided in the shaft groove. A keyway is provided on the valve stem at the position corresponding to the flat key. The longitudinal section of the rotor housing is I-shaped. The stator coil is connected to the control system.

[0012] The valve stem has threaded grooves below the keyway. A nut sleeve is detachably installed on the valve cover at the corresponding position of the threaded grooves, and the nut sleeve is threadedly connected to the threaded grooves. A drive motor rotates the valve stem, which is threadedly connected to the valve cover. During rotation, the valve stem causes the rotor housing and stator housing to rise or fall. The protective sleeve is fixed to the valve cover, and the stator housing slides on the protective sleeve. As the valve stem rises, the valve core leaves the valve seat on the valve body. With each rise, the flow channel between the valve core and the valve seat is opened. As the valve stem falls, the valve core approaches the valve seat. With each fall, the flow channel between the valve core and the valve seat is closed until the regulating valve is closed. The nut sleeve is sealed at the center of the valve cover and can be removed by maintenance personnel when worn.

[0013] One end of the stator core of the stator coil penetrates the stator shell, and a slide is provided on the stator shell between every two adjacent stator cores. The end of the slide near the valve cover forms a step outward.

[0014] An outer magnetic core is installed inside the casing corresponding to the position of each slide. The outer magnetic core is tightly connected to the vertical plane of the step. A baffle is installed at the upper end of the outer magnetic core. The baffle is in close contact with the wall of the slide. The length of the baffle is the same as the depth of the slide.

[0015] The length of the outer magnetic core is greater than the length of the stator core, and a plurality of excitation coils are provided on the outer magnetic core. The excitation coils are connected to the control system.

[0016] Each stator core is provided with a sliding through groove on the casing;

[0017] The protective sleeve has a through hole, and a pressure sensor (not shown in the figure) is installed in the through hole. The pressure sensor is connected to the control system and is located near the valve cover. A sliding groove is used to allow the stator core to slide out of the protective sleeve. After the stator coil is energized to generate a magnetic field, the stator core is magnetized, making it magnetic. When the drive motor is in normal use, the excitation coil on the outer magnetic core is not energized, and part of the stator core is exposed outside the stator shell, which helps to accelerate heat dissipation inside the stator shell. When liquid leakage occurs at the nut sleeve of the valve cover, the pressure sensor detects the pressure from the liquid. At this time, the liquid is temporarily stored in the space between the protective sleeve and the rotor shell. The pressure sensor transmits the pressure data to the control system, and the control system notifies maintenance personnel based on the data fed back by the pressure sensor. The control system calculates the data transmitted by the pressure sensor, calculating the rate of pressure increase received by the pressure sensor. If the pressure increases slowly, it indicates a slight leakage at the valve stem and valve cover; if the pressure increases quickly, it indicates that the seal between the valve stem and valve cover is damaged or the gap has widened. Based on the rate of pressure increase, the system notifies maintenance personnel to bring the appropriate tools, thus avoiding the situation where personnel carry a large number of useless tools, preventing them from quickly reaching the site. When a leak occurs, the control system reverses the rotor housing, causing the valve stem to move downwards to close the regulating valve. During rotor housing rotation, if the rotor housing moves downwards normally, it will pressurize the liquid below, increasing the pressure sensor's reading, and simultaneously force the liquid back into the regulating valve. If the pressure sensor value does not increase after the rotor housing has rotated for a certain period (the duration is set by the user), it indicates that the valve stem cannot move downwards normally. This means the valve stem and nut sleeve can no longer connect properly, and vertical slippage has occurred between the thread grooves and threads. At this point, the control system sequentially energizes the excitation coils. The magnetic field generated by the excitation coils interacts with the magnetism on the stator core, causing the stator core to move downwards under magnetic force. This, in turn, causes the stator housing to move downwards under the drive of the stator core, ultimately forcing the rotor housing to force the liquid into the regulating valve. Because the valve stem and nut sleeve can no longer perform normal threaded transmission, the excitation coils and stator coils can be continuously energized, allowing the rotor housing to continuously suppress liquid leakage under the influence of the magnetic field until maintenance personnel arrive. A baffle can be placed against the step to limit the movement between the casing and the stator housing. Data feedback from the pressure sensor enables the drive motor to protect against liquid leakage, preventing secondary damage to the regulating valve caused by prolonged leakage.

[0018] A guide rod is fitted onto the outer side of the valve stem, and a sliding sleeve is slidably mounted on the outer side of the guide rod. One end of the sliding sleeve is mounted on the valve core. The guide rod and the sliding sleeve cooperate to prevent the valve stem from contacting the liquid and from being exposed to air after contact with the liquid. The design of the guide rod and the sliding sleeve does not affect the drive motor's protection against liquid leakage. In the event of liquid leakage, the guide rod and the sliding sleeve will have already damaged the regulating valve. The guide rod and the sliding sleeve can further suppress leakage from the regulating valve.

[0019] The diameter of the upper end face of the rotor housing is greater than the diameter of the protective sleeve, and the length of the protective sleeve is greater than the length of the rotor housing and the length of the stator housing.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] 1. The bolt ring design enables the connection between the bolt and nut, reducing the number of parts required when assembling the valve body and external flange. The connection can be achieved simply by tightening the push plate on the nut cone. Four storage sleeves are installed on the bolt ring, their positions restricted by the bolt holes on the flange. Therefore, when the push plate is tightened, the storage sleeves do not rotate with the bolts on the nut cone, further reducing the number of installation tools needed and speeding up the entire installation process.

[0022] 2. When a liquid leak occurs at the nut sleeve of the valve cover, the pressure sensor detects the pressure from the liquid and transmits the pressure data to the control system. The control system then notifies maintenance personnel based on the data from the pressure sensor. The control system calculates the rate of pressure increase received by the sensor. If the pressure increases slowly, it indicates a minor leak at the valve stem and valve cover; if the pressure increases rapidly, it indicates that the seal between the valve stem and valve cover is damaged or the gap has widened. Based on the rate of pressure increase, the control system notifies maintenance personnel to bring the appropriate tools, thus avoiding the need for them to carry a large number of unnecessary tools and preventing them from quickly reaching the site.

[0023] 3. In the event of a leak, after the rotor housing has rotated for a certain period, the control system sequentially energizes the excitation coils. The magnetic field generated by the excitation coils interacts with the magnetism of the stator core, causing the stator core to move downwards under the influence of the magnetic force. This, in turn, causes the stator housing to move downwards under the drive of the stator core, ultimately forcing the liquid into the regulating valve. Data feedback from the pressure sensor enables the drive motor to protect against liquid leakage, preventing secondary damage to the regulating valve caused by prolonged leakage. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a front half-sectional view of the overall structure of the present invention;

[0026] Figure 2 This is a partial structural schematic diagram of the valve stem of the present invention;

[0027] Figure 3 This is a schematic diagram of the bolt ring structure of the present invention;

[0028] Figure 4 This is the invention Figure 3 A magnified view of a portion of region B in the middle;

[0029] Figure 5 This is a schematic diagram of the storage sleeve structure from the right side;

[0030] Figure 6 This is a schematic diagram of the drive mechanism structure of the present invention;

[0031] Figure 7 This is the invention Figure 6 A cross-sectional view along the AA direction;

[0032] Figure 8 This is a perspective view of the drive mechanism of the present invention;

[0033] Figure 9 This is a perspective view of the stator shell of the present invention;

[0034] Figure 10 This is the invention Figure 10 A magnified view of a portion of region I;

[0035] Figure 11 This is a perspective view of the protective sleeve of the present invention.

[0036] In the picture:

[0037] 1. Valve body; 2. Valve cover; 3. Valve core; 4. Valve stem; 401. Keyway; 402. Threaded groove; 5. Sliding sleeve; 6. Guide rod; 7. Nut sleeve;

[0038] 8. Drive motor; 801. Casing; 802. Rotor housing; 803. Stator housing; 803a. Slide rail; 803b. Step; 804. Stator coil; 804a. Stator core; 805. Rotor core; 806. Key; 807. Outer core; 808. Baffle;

[0039] 9. Handwheel; 10. Bolt ring; 11. Connecting rod; 12. Storage sleeve; 13. Nut cone; 14. Nut plate; 15. Locking post; 16. Compression chamber; 17. Ejector rod; 18. Locking groove. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figures 1-11 The present invention provides a technical solution: an electric flow regulating valve with feedback protection function, including a valve body 1, a valve cover 2, a valve stem 4, and a handwheel 9. The handwheel 9 is installed on the upper end of the valve stem 4. The regulating valve includes a valve core 3 and a drive motor 8. The valve core 3 is installed on one end of the valve stem 4 and is located in the valve body 1. The valve cover 2 is installed on the valve body 1. One end of the valve stem 4 passes through the valve cover 2 and is threadedly connected to the valve cover 2. The drive motor 8 is installed above the valve cover 2 and is connected to the output end of the valve stem 4. Bolt rings 10 are installed on the inner sides of the two flanges of the valve body 1. The bolt rings 10 are used to connect the regulating valve to a pipe or flange.

[0042] A guide rod 6 is fitted onto the outer side of the valve stem 4, and a sliding sleeve 5 is slidably mounted on the outer side of the guide rod 6. One end of the sliding sleeve 5 is mounted on the valve core 3. The guide rod 6 and the sliding sleeve 5 cooperate with each other to avoid contact between the valve stem 4 and the liquid, as well as the time it is exposed to air after contact with the liquid.

[0043] Four connecting rods 11 are mounted on the bolt ring 10. A storage sleeve 12 is mounted on one end of the connecting rod 11. Eight nut plates 14 are rotatably mounted on one end of the storage sleeve 12. A nut cone 13 is mounted at the center of the storage sleeve 12. A compression chamber 16 is set inside the storage sleeve 12. A bolt is mounted on one end of the nut cone 13. One end of the bolt is located inside the compression chamber 16 and is fitted with a piston plate. The piston plate is in tight contact with the wall of the compression chamber 16. A push plate is mounted on the other end of the nut cone 13. The diameter of the push plate is equal to the diameter of the storage sleeve 12. The bolt's threaded portion is threadedly connected to the storage sleeve 12. A cross groove, a slotted groove, or a hexagonal groove is opened on the end face of the push plate away from the nut cone.

[0044] Inside the storage sleeve 12, there is a top-out chamber corresponding to the position of each nut plate 14. The top-out chamber is connected to the compression chamber. A top-out rod 17 is slidably installed in each top-out chamber. One end of the top-out rod 17 pushes out of the storage sleeve 12. A spring is provided between one end of the top-out rod 17 and the top-out chamber.

[0045] The nut plate 14 is mounted on the storage sleeve 12 via a pin and a torsion spring. The torsion spring makes the nut plate 14 perpendicular to the plane of the storage sleeve 12 when it is not subjected to external force. When the nut plate 14 is subjected to force, i.e., when the ejector rod 17 pushes the end face of the nut plate 14, the nut plate 14 becomes parallel to the plane of the storage sleeve 12.

[0046] Connecting rod 11 is located in the threaded hole of the flange of valve body 1, and receiving sleeve 12 is located outside the flange of valve body 1. When the external flange or pipe is connected to valve body 1, receiving sleeve 12, along with nut plate 14 and nut cone 13, passes through the threaded hole on the external flange. Afterwards, a gasket or spring washer can be installed on receiving sleeve 12. Then, the installer uses an electric wrench to turn the push plate on nut cone 13, causing the push plate to drive nut cone 13 and bolt to rotate. Since the bolt is threadedly connected to receiving sleeve 12, as the bolt rotates, it gradually enters receiving sleeve 12, causing the piston plate to continuously... The air in the storage chamber is compressed, and the air continuously enters the ejection chamber, compressing the ejector rod 17. As the pressure in the ejection chamber increases, the ejector rod 17 gradually pushes the nut plate 14, causing the nut plate 14 to rotate on the storage sleeve 12, changing from a state perpendicular to the plane of the storage sleeve 12 to a state parallel to the plane of the storage sleeve 12. When the nut plate 14 is parallel to the plane of the storage sleeve 12, the piston plate is attached to the bottom of the compression chamber, the nut cone 13 is embedded in the storage sleeve 12, and the push plate is attached to the outside of the eight nut plates 14, thereby realizing the connection between the valve body 1 and the external flange. To disassemble the valve body 1 and the external flange, simply rotate the push plate in the opposite direction.

[0047] The longitudinal section of the nut plate 14 is a right-angled trapezoid, and the cross-section of the nut plate 14 is U-shaped. A slot 18 is provided on the plane of the nut plate 14 near the nut cone 13. A semi-cylindrical locking post 15 is provided on the push plate corresponding to each slot 18. The U-shaped cross-section of the nut plate 14 is used to enhance its structural strength. Simultaneously, when the push plate is attached to the nut plate 14, the locking post 15 engages in the slot, and the push plate presses against the nut plate 14, concentrating the reaction force generated by the external flange on the nut plate 14 between the nut plate 14 and the push plate, preventing the reaction force from deforming or breaking the pin on the nut plate 14.

[0048] The drive unit 8 includes a protective sleeve 801, a rotor housing 802, and a stator housing 803. The diameter of the upper end face of the rotor housing 802 is larger than the diameter of the protective sleeve 801, and the length of the protective sleeve 801 is greater than the length of the rotor housing 802 and the length of the stator housing 803.

[0049] One end of the protective sleeve 801 is fixed to the valve cover 2. The stator housing 803 is slidably installed inside the protective sleeve 801. The stator housing 803 is rotatably sleeved on the outside of the rotor housing 802. The stator coil 804 is provided on the inside of the stator housing 803. The rotor core 805 is provided on the outside of the rotor housing 802. A shaft groove is provided at the center of the rotor housing 802. A flat key 806 is provided in the shaft groove. A keyway 401 is opened on the valve stem 4 at the position corresponding to the flat key. The longitudinal section of the rotor housing 802 is I-shaped. The stator coil 804 is connected to the control system.

[0050] A threaded groove 402 is provided on the valve stem 4 below the keyway 401. A nut sleeve 7 is detachably installed on the valve cover 2 at the position corresponding to the threaded groove 402, and the nut sleeve 7 is threadedly connected to the threaded groove 402. The drive motor 8 is used to drive the valve stem 4 to rotate. The valve stem 4 is threadedly connected to the valve cover 2. During the rotation of the valve stem 4, it drives the rotor housing 802 and stator housing 803 to rise or fall. The protective sleeve 801 is fixed on the valve cover 2, and the stator housing 803 slides on the protective sleeve 801. As the valve stem 4 rises, the valve core 3 leaves the valve seat of the valve body 1. With the continuous rise of the valve stem 4, the flow channel between the valve core 3 and the valve seat is continuously opened. With the continuous fall of the valve stem 4, the valve core 3 continuously approaches the valve seat. With the continuous fall of the valve stem 4, the flow channel between the valve core 3 and the valve seat is continuously closed until the regulating valve is closed. The nut sleeve 7 is sealed and installed at the center position of the valve cover 2. When the nut sleeve 7 is worn, it can be removed by maintenance personnel.

[0051] One end of the stator core 804a of the stator coil 804 passes through the stator shell 803. A slide 803a is provided on the stator shell 803 between every two adjacent stator cores 804a. The end of the slide 803a near the valve cover 2 forms a step 803b outward.

[0052] Inside the casing 801, an outer magnetic core 807 is installed at the position corresponding to each slide 803a. The outer magnetic core 807 is tightly connected to the vertical plane of the step 803b. A baffle 808 is installed at the upper end of the outer magnetic core 807. The baffle 808 is in close contact with the wall of the slide 803a. The length of the baffle 808 is the same as the depth of the slide 803a.

[0053] The length of the outer magnetic core 807 is greater than the length of the stator core 804a. Several excitation coils are provided on the outer magnetic core 807, and the excitation coils are connected to the control system.

[0054] A sliding through groove is provided on the casing 801 at the position corresponding to each stator core 804a;

[0055] The casing 801 has a through hole, and a pressure sensor is installed inside the through hole. The pressure sensor is used to detect the liquid pressure inside the casing 801. The pressure sensor is connected to the control system and is located near the valve cover 2. A sliding groove is used to allow the stator core 804a to slide out of the casing 801.

[0056] When the stator coil 804 is energized and generates a magnetic field, the stator core 804a is magnetized, causing the stator core 804a to exhibit magnetism. When the drive motor 8 is in normal use, the excitation coil on the outer magnetic core 807 is not energized, and part of the stator core 804a is exposed to the stator shell 803, which helps to accelerate the heat dissipation inside the stator shell 803.

[0057] When a liquid leak occurs at the nut sleeve 7 of the valve cover 2, the pressure sensor detects the pressure from the liquid. At this time, the liquid is temporarily stored in the space between the casing 801 and the rotor housing 802. The pressure sensor transmits the pressure data to the control system, which then notifies maintenance personnel based on the data from the pressure sensor. The control system calculates the rate of pressure increase received by the pressure sensor. If the pressure increases slowly, it indicates a minor leak at the valve stem 4 and valve cover 2; if the pressure increases rapidly, it indicates that the seal between the valve stem 4 and valve cover 2 is damaged or the gap has widened. Based on the rate of pressure increase, the control system notifies maintenance personnel to bring the appropriate tools, thus avoiding the need for them to carry a large number of useless tools and preventing them from quickly reaching the site. When a leak occurs, the control system reverses the rotor housing 802, causing the valve stem 4 to move downwards to close the regulating valve.

[0058] During the rotation of rotor housing 802, if rotor housing 802 moves downward normally, rotor housing 802 will pressurize the liquid below, increasing the pressure value of the pressure sensor. At the same time, rotor housing 802 will push the liquid below back into the regulating valve. If the pressure sensor does not increase after the rotor housing 802 has rotated for a certain period of time (set by the user), it indicates that the valve stem 4 cannot move downwards normally. This means that the valve stem 4 and the nut sleeve 7 can no longer connect properly, and vertical sliding has occurred between the threaded groove 402 and the threaded teeth. At this time, the control system energizes the excitation coils sequentially. The magnetic field generated by the excitation coils interacts with the magnetism on the stator core 804a, causing the stator core 804a to move downwards under the action of the magnetic force. This, in turn, causes the stator housing 803 to move downwards under the drive of the stator core 804a, ultimately causing the rotor housing 802 to force the liquid into the regulating valve. Since the valve stem 4 and the nut sleeve 7 can no longer drive normally through the thread, the excitation coil and the stator coil 804 can continue to be energized, so that the rotor housing 802 continuously suppresses liquid leakage under the action of the magnetic field until maintenance personnel arrive. The baffle 808 can abut against the step 803b to limit the movement between the casing 801 and the stator housing 803.

[0059] Working principle of the invention:

[0060] The valve body 1 is connected to an external pipe or a flange on the pipe via bolt ring 10. The drive motor 8 is an electric motor that operates under the control of the control system. The drive motor 8 drives the valve stem 4 to rotate, thereby raising or lowering the valve core 3, thus realizing the opening or closing of the regulating valve or regulating the flow.

[0061] When the external flange or pipe is connected to the valve body 1, the receiving sleeve 12, along with the nut plate 14 and nut cone 13, passes through the threaded hole on the external flange. Then, a gasket or spring washer can be installed on the receiving sleeve 12. Afterwards, the installer uses an electric wrench to turn the push plate on the nut cone 13, causing the push plate to rotate the nut cone 13 and the bolt. Because the bolt is threadedly connected to the receiving sleeve 12, as the bolt rotates, it gradually enters the receiving sleeve 12, causing the piston plate to continuously compress the air in the receiving chamber, allowing air to continuously enter... The ejector rod 17 is compressed within the ejector chamber. As the pressure in the ejector chamber increases, the ejector rod 17 gradually pushes the nut plate 14, causing it to rotate on the receiving sleeve 12 and change from being perpendicular to the plane of the receiving sleeve 12 to being parallel to it. When the nut plate 14 is parallel to the plane of the receiving sleeve 12, the piston plate is attached to the bottom of the compression chamber, the nut cone 13 is embedded in the receiving sleeve 12, and the push plate is attached to the outside of the eight nut plates 14, thus connecting the valve body 1 to the external flange. To disassemble the valve body 1 from the external flange, simply rotate the push plate in the opposite direction.

[0062] When the push plate is attached to the nut plate 14, the locking pin 15 is engaged in the locking groove, and the push plate is pressed onto the nut plate 14, concentrating the reaction force generated by the external flange on the nut plate 14 between the nut plate 14 and the push plate, thus preventing the reaction force from squeezing, deforming or breaking the pin on the nut plate 14.

[0063] The drive motor 8 drives the valve stem 4 to rotate. The valve stem 4 is threadedly connected to the valve cover 2. During rotation, the valve stem 4 drives the rotor housing 802 and stator housing 803 to rise or fall. The protective sleeve 801 is fixed on the valve cover 2, and the stator housing 803 slides on the protective sleeve 801. As the valve stem 4 rises, the valve core 3 leaves the valve seat of the valve body 1. With the continuous rise of the valve stem 4, the flow channel between the valve core 3 and the valve seat is continuously opened. With the descent of the valve stem 4, the valve core 3 moves closer to the valve seat. With the continuous descent of the valve stem 4, the flow channel between the valve core 3 and the valve seat is continuously closed until the regulating valve is closed. The nut sleeve 7 is sealed and installed at the center of the valve cover 2. When the nut sleeve 7 wears, it can be removed by maintenance personnel.

[0064] When a liquid leak occurs at the nut sleeve 7 of the valve cover 2, the pressure sensor detects the pressure from the liquid. At this time, the liquid is temporarily stored in the space between the casing 801 and the rotor housing 802. The pressure sensor transmits the pressure data to the control system, which then notifies maintenance personnel based on the data from the pressure sensor. The control system calculates the rate of pressure increase received by the pressure sensor. If the pressure increases slowly, it indicates a minor leak at the valve stem 4 and valve cover 2; if the pressure increases rapidly, it indicates that the seal between the valve stem 4 and valve cover 2 is damaged or the gap has widened. Based on the rate of pressure increase, the control system notifies maintenance personnel to bring the appropriate tools, thus avoiding the need for them to carry a large number of useless tools and preventing them from quickly reaching the site. When a leak occurs, the control system reverses the rotor housing 802, causing the valve stem 4 to move downwards to close the regulating valve.

[0065] During the rotation of rotor housing 802, if rotor housing 802 moves downward normally, rotor housing 802 will pressurize the liquid below, increasing the pressure value of the pressure sensor. At the same time, rotor housing 802 will push the liquid below back into the regulating valve. If the pressure sensor does not increase after the rotor housing 802 has rotated for a certain period of time (set by the user), it indicates that the valve stem 4 cannot move downwards normally. This means that the valve stem 4 and the nut sleeve 7 can no longer connect properly, and vertical sliding has occurred between the threaded groove 402 and the threaded teeth. At this time, the control system energizes the excitation coils sequentially. The magnetic field generated by the excitation coils interacts with the magnetism on the stator core 804a, causing the stator core 804a to move downwards under the action of the magnetic force. This, in turn, causes the stator housing 803 to move downwards under the drive of the stator core 804a, ultimately causing the rotor housing 802 to force the liquid into the regulating valve. Since the valve stem 4 and the nut sleeve 7 can no longer drive normally through the thread, the excitation coil and the stator coil 804 can continue to be energized, so that the rotor housing 802 continuously suppresses liquid leakage under the action of the magnetic field until maintenance personnel arrive.

[0066] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0067] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric flow regulating valve with feedback protection function, comprising a valve body (1), a valve cover (2), a valve stem (4), and a handwheel (9), wherein the handwheel (9) is mounted on the upper end of the valve stem (4), characterized in that: The regulating valve includes a valve core (3) and a drive motor (8). The valve core (3) is installed at one end of the valve stem (4) and is located in the valve body (1). The valve cover (2) is installed on the valve body (1). One end of the valve stem (4) passes through the valve cover (2) and is threadedly connected to the valve cover (2). The drive motor (8) is installed above the valve cover (2) and is connected to the output end of the drive motor (8). Bolt rings (10) are installed on the inner sides of the two flanges of the valve body (1). The bolt rings (10) are used to connect the regulating valve to the pipe or flange. The drive unit (8) drives the valve stem (4) to rotate; The drive unit (8) includes a protective sleeve (801), a rotor housing (802), and a stator housing (803). One end of the protective sleeve (801) is fixed on the valve cover (2). The stator housing (803) is slidably installed inside the protective sleeve (801). The stator housing (803) is rotatably sleeved on the outside of the rotor housing (802). A stator coil (804) is provided on the inside of the stator housing (803). A rotor magnetic core (805) is provided on the outside of the rotor housing (802). A shaft groove is provided at the center of the rotor housing (802). A flat key (806) is provided in the shaft groove. A keyway (401) is provided on the valve stem (4) at the position corresponding to the flat key. The longitudinal section of the rotor housing (802) is "I" shaped. The stator coil (804) is connected to the control system. The valve stem (4) has a threaded groove (402) below the keyway (401), and the valve cover (2) is provided with a nut sleeve (7) in a detachable manner at the position corresponding to the threaded groove (402). The nut sleeve (7) is threadedly connected to the threaded groove (402). One end of the stator core (804a) of the stator coil (804) penetrates through the stator shell (803). A slide (803a) is provided on the stator shell (803) between every two adjacent stator cores (804a). The slide (803a) forms a step (803b) outward from the end of the slide (803a) near the valve cover (2). An outer magnetic core (807) is installed inside the casing (801) at the position corresponding to each slide (803a). The outer magnetic core (807) is tightly connected to the vertical plane of the step (803b). A baffle (808) is installed at the upper end of the outer magnetic core (807). The baffle (808) is in close contact with the wall of the slide (803a). The length of the baffle (808) is the same as the depth of the slide (803a). The length of the outer magnetic core (807) is greater than the length of the stator core (804a). The outer magnetic core (807) is provided with a plurality of excitation coils, which are connected to the control system. The sleeve (801) is provided with sliding through grooves at the positions corresponding to each stator core (804a); The sleeve (801) has a through hole, and a pressure sensor is installed in the through hole. The pressure sensor is connected to the control system and is located near the valve cover (2).

2. The electric flow regulating valve with feedback protection function according to claim 1, characterized in that: Four connecting rods (11) are installed on the bolt ring (10). A storage sleeve (12) is installed at one end of the connecting rod (11). Eight nut plates (14) are rotatably installed at one end of the storage sleeve (12). A nut cone (13) is installed at the center of the storage sleeve (12). A compression chamber (16) is provided inside the storage sleeve (12). A bolt is installed at one end of the nut cone (13). One end of the bolt is located inside the compression chamber (16) and is fitted with a piston plate. The piston plate is in close contact with the wall of the compression chamber (16). The storage sleeve (12) has a top-out chamber corresponding to the position of each nut plate (14) inside. The top-out chamber is connected to the compression chamber. A top-out rod (17) is slidably installed in each top-out chamber. One end of the top-out rod (17) pushes out of the storage sleeve (12). A spring is provided between one end of the top-out rod (17) and the top-out chamber. A push plate is installed at the other end of the nut cone (13), the diameter of which is equal to the diameter of the storage sleeve (12), and the bolt's threaded portion is threadedly connected to the storage sleeve (12).

3. An electric flow regulating valve with feedback protection function according to claim 2, characterized in that: The longitudinal section of the nut plate (14) is a right trapezoid, and the cross section of the nut plate (14) is "U" shaped. The nut plate (14) has a slot (18) on the plane near the nut cone (13). The push plate has a semi-cylindrical locking post (15) at the position corresponding to each slot (18).

4. An electric flow regulating valve with feedback protection function according to claim 1, characterized in that: A guide rod (6) is sleeved on the outside of the valve stem (4), and a sliding sleeve (5) is slidably installed on the outside of the guide rod (6). One end of the sliding sleeve (5) is installed on the valve core (3).

5. An electric flow regulating valve with feedback protection function according to claim 1, characterized in that: The diameter of the upper end face of the rotor housing (802) is greater than the diameter of the protective sleeve (801), and the length of the protective sleeve (801) is greater than the length of the rotor housing (802) and the length of the stator housing (803).

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