An improved electric valve with a long service life

Abstract

This invention relates to the field of electric valve technology and discloses an improved electric valve with a long service life, comprising a valve body and a closed flange that mates with the valve body. A valve cavity is formed within the valve body, and an mounting sleeve is fixedly connected within the valve cavity. Multiple guide grooves are formed on the inner circumferential wall of the mounting sleeve. A self-compensating sealing assembly, including a plug, is provided inside the mounting sleeve to block the opening. This invention utilizes a primary clearance compensation mechanism, where a threaded sleeve presses against a disc spring and a high-elastic rubber, causing the disc spring to shorten and the high-elastic rubber to compress, thus creating a buffer and achieving self-compensating clearance adjustment between the threaded sleeve and the external thread of the spindle. Furthermore, a secondary clearance compensation mechanism is used, where a sliding sleeve with a return spring and a V-shaped corrugated diaphragm is placed between the plug and the mounting sleeve, effectively preventing damage caused by hard contact sealing between the plug and the mounting sleeve.

Description

Technical Field

[0001] This invention relates to the field of electric valve technology, specifically to an improved electric valve with a long service life. Background Technology

[0002] An electric valve is an actuator that controls the on / off state of fluid or regulates the flow rate through an electric drive device. It is widely used in industrial automation, HVAC, water treatment and other fields.

[0003] The lifespan of traditional electric valves is limited by the following factors:

[0004] 1. The lack of buffer between the plug and the mounting sleeve will result in uncontrollable mechanical collisions. This rigid impact will not only cause stress concentration in the threaded meshing area, leading to plastic deformation or even fracture failure of the tooth profile, but will also cause instantaneous torque overload of the servo motor, seriously affecting the electrical safety and service life of the drive system;

[0005] 2. The clearance problem of threaded transmission pairs tends to worsen with the accumulation of working cycles. The initial small clearance during assembly will deteriorate under alternating loads due to material wear, resulting in geometric parameter degradation, specifically manifested as increased axial transmission backlash and loosening of the radial fit. This progressive wear will directly lead to a decrease in system positioning accuracy, and the repeatability error may exceed the allowable tolerance range, seriously affecting the accuracy of motion control;

[0006] 3. The two problems mentioned above have a coupling effect: the increased clearance of the threaded pair will exacerbate the impact load at the moving end, while frequent mechanical impacts will accelerate the wear process of the thread meshing surface, ultimately forming a vicious cycle of reduced accuracy - increased impact - accelerated wear. This systemic defect not only increases the failure rate of electric valves but also increases maintenance costs. For valves requiring high-precision sealing, this design flaw will severely restrict the reliability and service life of the system.

[0007] 4. Servo motors lack effective protection during use. If a sudden blockage occurs, the servo motor is prone to overload damage, or frequent use can lead to overheating damage. Summary of the Invention

[0008] Technical problems to be solved:

[0009] To address the shortcomings of existing technologies, this invention provides an improved electric valve with a longer service life. The main solution is to address the issue that increased clearance in the threaded assembly exacerbates the impact load at the moving end, while frequent mechanical impacts accelerate the wear process of the threaded meshing surface, ultimately creating a vicious cycle of reduced accuracy, increased impact, and accelerated wear. This systemic defect not only increases the failure rate of electric valves but also raises maintenance costs. For valves requiring high-precision sealing, this design flaw severely restricts system reliability and service life. Furthermore, the lack of effective protection for the servo motor during use makes it susceptible to overload damage in the event of sudden blockages or overheating damage from frequent use.

[0010] Technical solution:

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] An improved electric valve with a long service life includes a valve body and a closed flange that mates with the valve body. The valve body has a valve cavity, and a mounting sleeve is fixedly connected within the valve cavity. The inner circumferential wall of the mounting sleeve has multiple guide grooves. The mounting sleeve has a self-compensating sealing assembly inside to block the opening. The self-compensating sealing assembly includes a plug, the bottom of which has multiple guide claws integrally formed to mate with the guide grooves. A threaded sleeve is installed inside the plug via a primary clearance compensation mechanism. A main shaft is rotatably connected inside the closed flange. The end of the main shaft has an external thread that mates with the threaded sleeve. A secondary clearance compensation mechanism is provided between the plug and the mounting sleeve. A servo motor that drives the main shaft is fixedly connected to the top of the closed flange. An overload protection assembly is provided between the servo motor and the main shaft. The top of the closed flange has a locking assembly to fix the rotation angle of the main shaft and a protective cover assembly to protect the servo motor.

[0013] As a further embodiment of the present invention, the primary gap compensation mechanism includes a cap fixedly connected to the top of the plug. The plug has a perforated groove inside that mates with the perforated thread sleeve. The bottom inner wall of the perforated groove and the top inner wall of the cap are provided with multiple limiting platforms for limiting the perforated thread sleeve. Disc springs and multiple high-elastic rubbers are provided between the bottom inner wall of the perforated groove, the top inner wall of the cap and the perforated thread sleeve. The disc springs and high-elastic rubbers are always in contact with the perforated groove and the perforated thread sleeve. The height of the high-elastic rubbers is higher than the limiting platforms.

[0014] As a further embodiment of the present invention, the secondary gap compensation mechanism includes multiple guide holes formed inside the plug, with sliding columns slidably connected inside the guide holes. A sliding sleeve is fixedly connected between the bottom ends of the multiple sliding columns and slidably connected to the outer wall of the plug. An outer conical surface is formed on the outside of the sliding sleeve. An inner conical surface that mates with the outer conical surface and a clearance ring groove that mates with the plug are formed on the top of the mounting sleeve. A sealing ring that contacts the clearance ring groove and the plug is bonded to the bottom of the sliding sleeve. Multiple clearance holes communicating with the guide holes are formed inside the plug. A return spring is provided between the top inner wall of the clearance hole and the sealing box.

[0015] As a further embodiment of the present invention, a foldable corrugated diaphragm is provided between the outer wall of the plug and the edge of the sliding sleeve, and the cross-section of the corrugated diaphragm is V-shaped.

[0016] As a further embodiment of the present invention, a sealing box is integrally formed at the bottom of the plug and at a position between multiple guide claws, a sealing sleeve is provided inside the closed flange that contacts the main shaft, and an mounting plate for pressing and fixing the sealing sleeve is fixedly connected to the top of the closed flange.

[0017] As a further embodiment of the present invention, the overload protection component includes a torque sensor installed at the end of the spindle, and the torque sensor is connected and fixed to the output shaft of the servo motor via a safety coupling.

[0018] As a further embodiment of the present invention, the locking assembly includes a gear plate fixedly connected to the outer side of the main shaft circumference, a push-pull electromagnetic lock fixedly connected to the top of the closed flange, a mounting bracket fixedly connected to the top of the push-pull electromagnetic lock, a gear frame that mates with the gear plate inserted inside the mounting bracket, locking tension springs fixedly connected between the two ends of the gear frame and the mounting bracket, and a connecting shaft fixedly connected between the push rod of the push-pull electromagnetic lock and the gear frame.

[0019] As a further embodiment of the present invention, the protective cover assembly includes a cover that is fixedly connected to the top of the closed flange and wraps around the servo motor. Thermally conductive silicone is provided between the cover and the servo motor. Heat dissipation fins are fixedly connected to all four outer walls of the cover. A temperature sensor is inserted inside the cover. A two-stage heat dissipation mechanism is provided on the outer wall of the cover. A cable protection sleeve is provided on the top of the cover.

[0020] As a further embodiment of the present invention, the secondary heat dissipation mechanism includes multiple heat dissipation holes I opened around the perimeter of the housing. Multiple guide rails are fixedly connected to the outer circumference of the housing. A baffle that blocks the heat dissipation hole I is slidably connected between two adjacent guide rails. A heat dissipation hole II corresponding to the heat dissipation hole I is opened inside the baffle. A push-pull ring is provided inside the housing. A connecting block that passes through the vertical groove opened in the housing and is fixedly connected to the inner surface of the baffle is fixedly connected to the outer perimeter of the push-pull ring. Two opposing electric push rods are fixedly connected between the push-pull ring and the closed flange.

[0021] As a further embodiment of the present invention, a vibration sensor and an acoustic emission sensor are detachably installed on the top of the closed flange by screws. A module box is fixedly connected to the top of the closed flange. A processor is provided inside the module box. The processor is electrically connected to the vibration sensor, the acoustic emission sensor, the servo motor, the overload protection component, the locking component, and the protective cover component.

[0022] Beneficial effects:

[0023] Compared with the prior art, the present invention provides an improved electric valve with a long service life and has the following beneficial effects:

[0024] 1. This invention completes the flow regulation and sealing operation of the electric valve through a self-compensating sealing component, so that the sliding sleeve and the mounting sleeve achieve a self-compensating seal.

[0025] 2. The present invention uses a primary clearance compensation mechanism to press the disc spring and the high-elastic rubber with a plum blossom thread sleeve, causing the disc spring to shorten and the high-elastic rubber to compress and deform, thereby forming a buffer and realizing self-compensating clearance adjustment between the plum blossom thread sleeve and the external thread of the spindle.

[0026] 3. The present invention, through the provision of a two-stage gap compensation mechanism, sets a sliding sleeve with a return spring and a V-shaped corrugated diaphragm between the plug and the mounting sleeve, which effectively avoids damage caused by hard contact sealing between the plug and the mounting sleeve.

[0027] 4. This invention provides dual protection for the servo motor by setting up an overload protection component. Firstly, it effectively prevents the servo motor from being damaged by overload through a safety coupling. Secondly, it uses a torque sensor to monitor changes in the output torque of the spindle to determine whether the valve is within its normal operating range.

[0028] 5. This invention achieves the locking and fixing of the spindle by setting a locking component, where the gear frame and gear disc are locked and fixed, while the push-pull electromagnetic lock can control the engagement and fixing state of the gear frame and gear disc, thereby realizing the free locking and unlocking of the spindle.

[0029] 6. This invention provides thermally conductive silicone between the servo motor and the housing, which facilitates the transfer of heat generated by the servo motor to the housing via the thermally conductive silicone, and provides initial and effective heat dissipation through multiple heat dissipation fins on the outer wall of the housing.

[0030] 7. The present invention extends the electric push rod so that the second heat dissipation hole in the baffle coincides with the first heat dissipation hole in the cover, and realizes the rapid replacement of air inside the cover with air outside the cover, thereby achieving the purpose of secondary heat dissipation.

[0031] 8. This invention uses vibration sensors and acoustic emission sensors to collect real-time wear data inside the electric valve, effectively predicting the wear status of the electric valve. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the front side of an improved electric valve with a long service life proposed in this invention;

[0033] Figure 2 This invention proposes an improved electric valve with a long service life. Figure 1 A schematic diagram of the cross-sectional structure;

[0034] Figure 3 This invention proposes an improved electric valve with a long service life. Figure 2 A partially enlarged structural diagram;

[0035] Figure 4 This is a schematic diagram of the locking assembly structure of an improved electric valve with a long service life proposed in this invention;

[0036] Figure 5 This invention proposes an improved electric valve with a long service life. Figure 3 A schematic diagram of the exploded structure;

[0037] Figure 6 This invention proposes an improved electric valve with a long service life. Figure 5 A magnified structural diagram of part A;

[0038] Figure 7 This is a schematic diagram of the self-compensating sealing assembly structure of an improved electric valve with a long service life proposed in this invention.

[0039] Figure 8 This invention proposes an improved electric valve with a long service life. Figure 7 A schematic diagram of the enlarged structure of part B;

[0040] Figure 9 This invention proposes an improved electric valve with a long service life. Figure 7 A schematic diagram of the exploded structure;

[0041] Figure 10 This is a schematic diagram of the protective cover assembly structure of an improved electric valve with a long service life proposed in this invention;

[0042] Figure 11 This invention proposes an improved electric valve with a long service life. Figure 10 A schematic diagram of the exploded structure;

[0043] Figure 12 This invention proposes an improved electric valve with a long service life. Figure 11 A magnified structural diagram of section C;

[0044] Figure 13 This is a flowchart of the processor operation for an improved electric valve with a long service life proposed in this invention.

[0045] In the diagram: 1. Protective cover assembly; 2. Sealing flange; 3. Valve body; 4. Mounting sleeve; 5. Valve cavity; 6. Self-compensating sealing assembly; 7. Locking assembly; 8. Servo motor; 9. Module box; 10. Mounting plate; 11. Sealing sleeve; 12. Vibration sensor; 13. Acoustic emission sensor; 101. Cover; 102. Thermally conductive silicone; 103. Temperature sensor; 104. Push-pull ring; 105. Electric push rod; 106. Vertical groove; 107. Guide rail; 108. Heat dissipation hole one; 109. Heat dissipation hole two; 110. Baffle; 111. Heat dissipation fins; 112. Cable sleeve; 113. Connecting block; 401. Guide groove; 402. Alternating ring groove; 403. 601. Internal conical surface; 602. External thread; 603. Main shaft; 604. Torque sensor; 605. Safety coupling; 606. Plug; 607. Corrugated diaphragm; 608. Sliding sleeve; 609. Return spring; 610. Sliding column; 611. Guide claw; 612. Plexicon groove; 613. High-elastic rubber; 614. Disc spring; 615. Plexicon threaded sleeve; 616. Cover; 617. External conical surface; 618. Sealing box; 619. Sealing ring; 620. Alternating hole; 621. Guide hole; 701. Limiting platform; 702. Gear frame; 703. Push-pull electromagnetic lock; 704. Locking tension spring; 705. Mounting bracket; 706. Connecting shaft. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0047] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] Reference Figures 1-12An improved electric valve with a long service life includes a valve body 3 and a closed flange 2 that mates with the valve body 3. A valve cavity 5 is formed inside the valve body 3, and an mounting sleeve 4 is fixed inside the valve cavity 5 by bolts. Multiple guide grooves 401 are formed on the inner circumference of the mounting sleeve 4. A self-compensating sealing assembly 6 is provided inside the mounting sleeve 4 to block the opening. The self-compensating sealing assembly 6 includes a plug 605, the bottom of which has multiple guide claws 610 integrally formed to mate with the guide grooves 401. A perforated threaded sleeve 614 is installed inside the plug 605 through a primary clearance compensation mechanism. A main shaft 602 is rotatably connected inside the closed flange 2. The end of the main shaft 602 has an external thread 601 that mates with the perforated threaded sleeve 614. A secondary clearance compensation mechanism is provided between the plug 605 and the mounting sleeve 4. The top of the flange 2 is bolted with a servo motor 8 that drives the spindle 602. An overload protection component is provided between the servo motor 8 and the spindle 602. The top of the sealed flange 2 is equipped with a locking component 7 that fixes the rotation angle of the spindle 602 and a protective cover component 1 that protects the servo motor 8. Since the plug 605 of the electric valve is driven to rise and fall by the servo motor 8 through the spindle 602, and the plug 605 and the mounting sleeve 4 are sealed by hard contact, there is a gap between the threaded nut and the servo motor 8 drive system to realize the vertical displacement control of the plug 605 through the meshing of the external thread 601 of the spindle 602 and the plum blossom thread sleeve 614, and to make the plug 605 contact and seal with the mounting sleeve 4. However, there are several structural defects in actual operation that need to be focused on.

[0050] First, there is a lack of buffer between the plug 605 and the mounting sleeve 4. When the plug 605 is vertically displaced to contact the mounting sleeve 4, an uncontrollable mechanical collision will occur. This rigid impact will not only cause stress concentration in the threaded meshing area, resulting in plastic deformation or even fracture failure of the tooth profile, but will also cause instantaneous torque overload of the servo motor 8, seriously affecting the electrical safety and service life of the drive system.

[0051] Secondly, the clearance problem of threaded drive pairs tends to worsen with the accumulation of working cycles. The initial small clearance during assembly will deteriorate under alternating loads due to material wear, resulting in increased axial transmission backlash and loosening of the radial fit. This progressive wear will directly lead to a decrease in system positioning accuracy, and the repeatability error may exceed the allowable tolerance range, seriously affecting the accuracy of motion control.

[0052] More importantly, the two problems mentioned above have a coupling effect: the increased clearance of the threaded pair exacerbates the impact load at the moving end, while frequent mechanical impacts accelerate the wear process of the threaded meshing surface, ultimately forming a vicious cycle of reduced accuracy, increased impact, and accelerated wear. This systemic defect not only increases the failure rate of electric valves but also increases maintenance costs. For valves requiring high-precision sealing, this design flaw will severely restrict the reliability and service life of the system.

[0053] Therefore, through the primary clearance compensation mechanism and the secondary clearance compensation mechanism, effective buffering is achieved during the contact sealing process between the plug 605 and the mounting sleeve 4, and the clearance adjustment between the plum blossom thread sleeve 614 and the external thread 601 of the spindle 602 is also self-compensated, and the overload protection of the servo motor 8 is achieved through the overload protection component.

[0054] A sealing box 617 is integrally formed at the bottom of the plug 605 and at the position between multiple guide claws 610. The interior of the closed flange 2 is provided with a sealing sleeve 11 that contacts the main shaft 602. The top of the closed flange 2 is fixed with a mounting plate 10 by bolts to press and fix the sealing sleeve 11, thereby achieving effective sealing between the main shaft 602 and the closed flange 2.

[0055] The primary gap compensation mechanism of this invention includes a cover 615 fixed to the top of a plug 605 by bolts. The plug 605 has a perforated groove 611 that mates with a perforated threaded sleeve 614. Multiple limiting platforms 621 for limiting the perforated threaded sleeve 614 are provided on the bottom inner wall of the perforated groove 611 and the top inner wall of the cover 615. Disc springs 613 and multiple high-elastic rubbers 612 are provided between the bottom inner wall of the perforated groove 611, the top inner wall of the cover 615, and the perforated threaded sleeve 614. The disc springs 613 and the high-elastic rubbers 612 are always in contact with the perforated groove 611 and the perforated threaded sleeve 614. The height of the high-elastic rubbers 612 is higher than... During sealing, the limiting stage 621 rotates, and the spindle 602 rotates through the external thread 601 to drive the plum blossom sleeve 614 to move downward along the plum blossom groove 611. Since the plum blossom sleeve 614 is in contact with the disc spring 613 and the high-elastic rubber 612, the plum blossom sleeve 614 drives the plug 605 to move downward along the guide groove 401 through the guide claw 610 until the plug 605 contacts the mounting sleeve 4. At this time, the spindle 602 continues to rotate and drives the plum blossom sleeve 614 to move downward. At this time, the plum blossom sleeve 614 presses the disc spring 613 and the high-elastic rubber 612, and causes the disc spring 613 to shorten and deform and the high-elastic rubber 612 to compress and deform, thereby forming a buffer.

[0056] The secondary clearance compensation mechanism of this invention includes multiple guide holes 620 formed inside the plug 605. Sliding pins 609 are slidably connected within the guide holes 620. Sliding sleeves 607 are welded between the bottom ends of the multiple sliding pins 609 and slidably connected to the outer wall of the plug 605. An outer conical surface 616 is formed on the outside of the sliding sleeve 607. The top of the mounting sleeve 4 has an inner conical surface 403 that mates with the outer conical surface 616 and a clearance ring groove 402 that mates with the plug 605. The bottom of the sliding sleeve 607... A sealing ring 618 is bonded to the relief ring groove 402 and the plug 605. The plug 605 has multiple relief holes 619 communicating with the guide hole 620. A return spring 608 is provided between the top inner wall of the relief hole 619 and the sealing box 617. A foldable corrugated diaphragm 606 is provided between the outer wall of the plug 605 and the edge of the sliding sleeve 607. The corrugated diaphragm 606 has a V-shaped cross-section. During sealing, the main shaft 602 rotates through the external thread 601 and the plumb line sleeve 614. The plug 605 moves downward along the guide groove 401 via the guide claw 610. When the outer conical surface 616 of the sliding sleeve 607 contacts the inner conical surface 403 of the mounting sleeve 4, the sliding sleeve 607 drives the sliding column 609 to move upward along the guide hole 620. At this time, the return spring 608 is compressed, and the corrugated diaphragm 606 is folded. Since the corrugated diaphragm 606 is a metal-based composite diaphragm, mainly composed of copper and copper alloys and carbon fiber, and then passed through an ethylene / octene / propylene blend... An intermediate transition layer is formed for connection, thereby balancing flexibility and mechanical strength, so that the manufactured metal-based composite diaphragm has high toughness and good mechanical properties, and is corrosion-resistant and has a long service life. Until the top end face of the sliding sleeve 607 is in contact with the plug 605, the return spring 608 falls completely into the relief hole 619, and the V-shaped corrugated diaphragm 606 is folded. At this time, the contact between the plug 605 and the mounting sleeve 4 is buffered, effectively avoiding hard contact that would reduce the service life.

[0057] To achieve overload protection for the servo motor 8, the overload protection component in this invention includes a torque sensor 603 installed at the end of the spindle 602. The torque sensor 603 is model JNNT-S. The torque sensor 603 is connected and fixed to the output shaft of the servo motor 8 via a safety coupling 604. The safety coupling 604 is a torque limiting type coupling, model TLC500-1. When the valve is blocked, causing the movement of the plug 605 to be restricted, the required torque exceeds the set value. The safety coupling 604 restricts the torque transmitted by the servo motor 8 by slipping. When the overload situation disappears, it automatically reconnects, effectively preventing the servo motor 8 from being damaged by overload. Furthermore, the torque sensor 603 monitors the output torque of the spindle 602 in real time, thereby enabling the determination of whether the valve is within the normal operating range by monitoring the changes in the output torque of the spindle 602.

[0058] To prevent the spindle 602 from rotating, the locking assembly 7 in this invention includes a gear disc 701 bolted to the outer circumference of the spindle 602. A push-pull electromagnetic lock 703 (model LY-078) is bolted to the top of the sealing flange 2. A mounting bracket 705 is bolted to the top of the push-pull electromagnetic lock 703. A gear frame 702, which mates with the gear disc 701, is inserted into the mounting bracket 705. Both ends of the gear frame 702 are bolted to the mounting bracket 705 to secure locking mechanisms. The spring 704 and the push rod of the push-pull electromagnetic lock 703 are fixed to the gear frame 702 by a connecting shaft 706 through bolts. The gear frame 702 and the gear plate 701 lock and fix the main shaft 602, effectively preventing the main shaft 602 from rotating on its own and affecting the use of the electric valve. When adjusting the flow, the push rod of the push-pull electromagnetic lock 703 is activated. The push rod of the push-pull electromagnetic lock 703 shortens and drives the gear frame 702 to move backward through the connecting shaft 706, so that the gear frame 702 disengages from the gear plate 701, thereby releasing the main shaft 602 from the locked state.

[0059] In this invention, the protective cover assembly 1 includes a cover 101 that is bolted to the top of the closed flange 2 and encloses the servo motor 8. Thermally conductive silicone 102 is provided between the cover 101 and the servo motor 8. Heat dissipation fins 111 are welded to the outer walls of the cover 101. A temperature sensor 103 (NTC type) is inserted inside the cover 101. A secondary heat dissipation mechanism is provided on the outer wall of the cover 101. A cable sleeve 112 is provided on the top of the cover 101. The secondary heat dissipation mechanism includes multiple heat dissipation holes 108 formed around the cover 101. The outer circumference of the cover 101 is... Multiple guide rails 107 are bolted together. A baffle 110 is slidably connected between adjacent guide rails 107 to block the first heat dissipation hole 108. The baffle 110 has a second heat dissipation hole 109 corresponding to the first heat dissipation hole 108. A push-pull ring 104 is located inside the cover 101. Vertical grooves 106 passing through the cover 101 and connecting blocks 113 are welded to the outer walls of the push-pull ring 104 and fixed to the inner surface of the baffle 110. Two opposing electric push rods 105 are bolted between the push-pull ring 104 and the closed flange 2. The cover 101 allows for the control of the servo motor 8. Effective protection is provided to prevent external factors from affecting the operation of the servo motor 8 and electrical components. When the electric valve is used frequently, the temperature of the servo motor 8 will rise sharply when operating at high frequency or in a hot air environment. At this time, the closed state of the cover 101 seriously affects the heat dissipation of the servo motor 8. Therefore, a temperature sensor 103 is installed inside the cover 101 for real-time temperature monitoring, and thermally conductive silicone 102 is placed between the servo motor 8 and the cover 101 to facilitate the heat generated by the servo motor 8 to be conducted to the cover 101 through the thermally conductive silicone 102, and then dissipated through the outside of the cover 101. Multiple heat dissipation fins 111 installed on the wall provide initial and effective heat dissipation. However, if the servo motor 8 still fails to reach the set value after initial heat dissipation, the electric push rod 105 is activated. The electric push rod 105 extends, causing the push-pull ring 104 to drive the baffle 110 upward through the connecting block 113, and causing the second heat dissipation hole 109 of the baffle 110 to coincide with the first heat dissipation hole 108 of the cover 101. At this time, the cover 101 is open on all sides, so the air inside the cover 101 can be quickly replaced with the air outside the cover 101, thereby achieving the purpose of secondary heat dissipation and effectively preventing the servo motor 8 from overheating and being damaged.

[0060] To achieve intelligent early warning for the electric valve, a vibration sensor 12 and an acoustic emission sensor 13 are detachably mounted on the top of the closed flange 2 in this invention via screws. The vibration sensor 12 is model HG-ZD-20A-F, and the acoustic emission sensor 13 is model PXR15. A module box 9 is bolted to the top of the closed flange 2. The module box 9 contains a processor, which is electrically connected to the vibration sensor 12, the acoustic emission sensor 13, the servo motor 8, the torque sensor 603, the push-pull electromagnetic lock 703, the temperature sensor 103, and the electric push rod 105. This allows for real-time acquisition of internal wear data of the electric valve through the vibration sensor 12 and the acoustic emission sensor 13. The processor's operation flowchart is shown below. Figure 13 As shown, the processor includes a temperature control system, an overload protection system, a monitoring system, and a locking system. The monitoring system collects internal wear data of the electric valve in real time to effectively predict the wear status of the electric valve. The overload protection system effectively prevents the servo motor 8 from being damaged by overload. The temperature control system can monitor and control the temperature of the servo motor 8 in real time. The locking system can accurately control the opening state of the electric valve.

[0061] The present invention is used in the following steps:

[0062] S1: When the electric valve is sealing, the locking assembly 7 is released first. At this time, the push-pull electromagnetic lock 703 is activated. The push rod of the push-pull electromagnetic lock 703 is shortened and drives the gear frame 702 to move backward through the connecting shaft 706, and disengages the gear frame 702 from the gear plate 701, thereby disengaging the main shaft 602 from the locked state.

[0063] S2: Then start the servo motor 8. The rotation of the servo motor 8 drives the main shaft 602 to rotate through the safety coupling 604. The rotation of the main shaft 602 drives the plum blossom sleeve 614 to move downward along the plum blossom groove 611 through the external thread 601. Since the plum blossom sleeve 614 is in contact with the disc spring 613 and the high-elastic rubber 612, at this time the plum blossom sleeve 614 drives the plug 605 to move downward along the guide groove 401 through the guide claw 610.

[0064] S3: When the outer conical surface 616 of the sliding sleeve 607 contacts the inner conical surface 403 of the mounting sleeve 4, the sliding sleeve 607 drives the sliding column 609 to move upward along the guide hole 620. At this time, the return spring 608 is compressed by force, and the corrugated diaphragm 606 is folded by force. Since the corrugated diaphragm 606 is a metal-based composite diaphragm, and is mainly composed of copper and copper alloys and carbon fiber, and then connected by an intermediate transition layer formed by ethylene / octene / propylene blend, the flexibility and mechanical strength are balanced, so that the metal-based composite diaphragm has high toughness and good mechanical properties, and is corrosion-resistant and has a long service life. Until the top end face of the sliding sleeve 607 is in contact with the plug 605, the return spring 608 falls completely into the clearance hole 619, and the V-shaped corrugated diaphragm 606 is folded. At this time, the buffering of the contact between the plug 605 and the mounting sleeve 4 is achieved.

[0065] S4: At this time, the main shaft 602 continues to rotate and drives the plum blossom sleeve 614 to move downward. At this time, the plum blossom sleeve 614 presses the disc spring 613 and the high elastic rubber 612, and causes the disc spring 613 to shorten and deform and the high elastic rubber 612 to compress and deform, thereby forming a buffer. The elastic force generated by the disc spring 613 and the high elastic rubber 612, as well as the elastic force of the return spring 608 and the corrugated diaphragm 606, can enable the sliding sleeve 607 and the mounting sleeve 4 to achieve a self-compensating seal, while the limiting stage 621 can effectively limit the position of the plum blossom sleeve 614.

[0066] S5: Therefore, under the dual action of the primary clearance compensation mechanism and the secondary clearance compensation mechanism, the sliding sleeve 607 and the mounting sleeve 4 are self-compensatingly sealed, and the gap between the plum blossom thread sleeve 614 and the external thread 601 of the main shaft 602 is also self-compensatingly adjusted.

[0067] S6: At this time, the spindle 602 is locked and fixed by the locking assembly 7;

[0068] S7: When the electric valve is used frequently, the temperature of the servo motor 8 will rise sharply when it operates at high frequency or in a hot air environment. At this time, the closed state of the cover 101 seriously affects the heat dissipation of the servo motor 8. Therefore, a temperature sensor 103 is installed inside the cover 101 to monitor the temperature in real time, and thermal conductive silicone 102 is installed between the servo motor 8 and the cover 101. This facilitates the heat generated by the servo motor 8 to be conducted to the cover 101 through the thermal conductive silicone 102, and the heat is initially and effectively dissipated through the multiple heat dissipation fins 111 installed on the outer wall of the cover 101.

[0069] S8: If the servo motor 8 still fails to reach the set value after initial heat dissipation, the electric push rod 105 is activated. The electric push rod 105 extends, causing the push-pull ring 104 to drive the baffle 110 upward through the connecting block 113, and causing the second heat dissipation hole 109 of the baffle 110 to coincide with the first heat dissipation hole 108 of the cover 101. At this time, the cover 101 is open on all sides, so the air inside the cover 101 can be quickly replaced with the air outside the cover 101, thereby achieving the purpose of secondary heat dissipation and effectively preventing the servo motor 8 from overheating and being damaged.

[0070] S9: At the same time, the electric valve collects internal wear data in real time through the vibration sensor 12 and acoustic emission sensor 13, effectively predicting the wear status of the electric valve.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An improved electric valve with a long service life, comprising a valve body (3) and a closed flange (2) that mates with the valve body (3), wherein a valve cavity (5) is provided within the valve body (3), characterized in that, An installation sleeve (4) is fixedly connected inside the valve cavity (5). Multiple guide grooves (401) are provided on the inner circumferential wall of the installation sleeve (4). A self-compensating sealing assembly (6) is provided inside the installation sleeve (4) to block the opening. The self-compensating sealing assembly (6) includes a plug (605). Multiple guide claws (610) that cooperate with the guide grooves (401) are integrally formed on the bottom of the plug (605). A sealing box (617) is integrally formed at the bottom of the plug (605) and between the multiple guide claws (610). A perforated sleeve (617) is installed inside the plug (605) through a primary gap compensation mechanism. 4) The closed flange (2) is rotatably connected to a main shaft (602). The end of the main shaft (602) is provided with an external thread (601) that mates with a plum blossom sleeve (614). A two-stage clearance compensation mechanism is provided between the plug (605) and the mounting sleeve (4). A servo motor (8) that drives the main shaft (602) is fixedly connected to the top of the closed flange (2). An overload protection component is provided between the servo motor (8) and the main shaft (602). A locking component (7) that fixes the rotation angle of the main shaft (602) and a protective cover component (1) that protects the servo motor (8) are provided on the top of the closed flange (2). The primary gap compensation mechanism includes a cap (615) fixedly connected to the top of the plug (605). The plug (605) has a plum blossom groove (611) that cooperates with the plum blossom sleeve (614). The bottom inner wall of the plum blossom groove (611) and the top inner wall of the cap (615) are provided with multiple limiting platforms (621) to limit the plum blossom sleeve (614). The bottom inner wall of the plum blossom groove (611) and the top inner wall of the cap (615) are provided with disc springs (613) and multiple high-elastic rubbers (612) between the plum blossom groove (611) and the plum blossom sleeve (614). The disc springs (613) and the high-elastic rubbers (612) are always in contact with the plum blossom groove (611) and the plum blossom sleeve (614). The height of the high-elastic rubbers (612) is higher than the limiting platform (621). The secondary clearance compensation mechanism includes multiple guide holes (620) inside the plug (605), with sliding pins (609) slidably connected within the guide holes (620). A sliding sleeve (607) is fixedly connected between the bottom ends of the multiple sliding pins (609) and slidably connected to the outer wall of the plug (605). An outer conical surface (616) is provided on the outside of the sliding sleeve (607), and the top of the mounting sleeve (4) has a surface that mates with the outer conical surface (616). The inner conical surface (403) and the clearance ring groove (402) that cooperates with the plug (605) are provided. The bottom of the sliding sleeve (607) is bonded with a sealing ring (618) that contacts the clearance ring groove (402) and the plug (605). The plug (605) has multiple clearance holes (619) that communicate with the guide hole (620) inside. A return spring (608) is provided between the inner wall of the top of the clearance hole (619) and the sealing box (617).

2. The improved electric valve with long service life according to claim 1, characterized in that, A foldable corrugated diaphragm (606) is provided between the outer wall of the plug (605) and the edge of the sliding sleeve (607), and the cross-section of the corrugated diaphragm (606) is V-shaped.

3. The improved electric valve with long service life according to claim 1, characterized in that, The sealed flange (2) is provided with a sealing sleeve (11) that contacts the main shaft (602) inside, and a mounting plate (10) for pressing and fixing the sealing sleeve (11) is fixedly connected to the top of the sealed flange (2).

4. An improved electric valve with a long service life according to claim 1, characterized in that, The overload protection component includes a torque sensor (603) installed at the end of the spindle (602), and the torque sensor (603) is connected and fixed to the output shaft of the servo motor (8) by a safety coupling (604).

5. An improved electric valve with a long service life according to claim 1, characterized in that, The locking assembly (7) includes a gear plate (701) fixedly connected to the outer circumference of the main shaft (602), a push-pull electromagnetic lock (703) fixedly connected to the top of the closed flange (2), a mounting bracket (705) fixedly connected to the top of the push-pull electromagnetic lock (703), a gear frame (702) that mates with the gear plate (701) inserted inside the mounting bracket (705), a locking tension spring (704) fixedly connected to both ends of the gear frame (702) and the mounting bracket (705), and a connecting shaft (706) fixedly connected between the push rod of the push-pull electromagnetic lock (703) and the gear frame (702).

6. An improved electric valve with a long service life according to claim 1, characterized in that, The protective cover assembly (1) includes a cover (101) fixedly connected to the top of the closed flange (2) and covering the servo motor (8). Thermal conductive silicone (102) is provided between the cover (101) and the servo motor (8). Heat dissipation fins (111) are fixedly connected to the outer walls of the cover (101). A temperature sensor (103) is inserted inside the cover (101). A two-stage heat dissipation mechanism is provided on the outer wall of the cover (101). A cable protection sleeve (112) is provided on the top of the cover (101).

7. An improved electric valve with a long service life according to claim 6, characterized in that, The secondary heat dissipation mechanism includes multiple heat dissipation holes (108) opened around the cover (101). Multiple guide rails (107) are fixedly connected to the outer circumference of the cover (101). A baffle (110) that blocks the heat dissipation hole (108) is slidably connected between two adjacent guide rails (107). A heat dissipation hole (109) corresponding to the heat dissipation hole (108) is opened inside the baffle (110). A push-pull ring (104) is provided inside the cover (101). A connecting block (113) that passes through the vertical groove (106) opened in the cover (101) and is fixedly connected to the inner surface of the baffle (110) is fixedly connected to the outer wall of the push-pull ring (104). Two opposing electric push rods (105) are fixedly connected between the push-pull ring (104) and the closed flange (2).

8. An improved electric valve with a long service life according to claim 1, characterized in that, The top of the closed flange (2) is detachably mounted with a vibration sensor (12) and an acoustic emission sensor (13) by screws. The top of the closed flange (2) is fixedly connected with a module box (9). The module box (9) contains a processor, which is electrically connected to the vibration sensor (12), the acoustic emission sensor (13), the servo motor (8), the overload protection component, the locking component (7), and the protective cover component (1).

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