Pressure sensing feedback double-closed-loop control electromagnetic valve

Abstract

The invention discloses a pressure sensing feedback double-closed-loop control electromagnetic valve, which belongs to the technical field of electromagnetic valves, and comprises a shell mechanism, a high-frequency valve mechanism, a first air tap mechanism, a regulating valve mechanism, a second air tap mechanism, a pressure sensing mechanism and a control mechanism, and three high-frequency valve mechanisms are mounted on the shell mechanism. Through the arrangement of the regulating valve mechanism and the second air nozzle mechanism, the device can form back pressure at the outlet air nozzle end of the regulating valve, then the power of an electromagnet can be reduced after the regulating valve is opened, the energy consumption of the device is effectively reduced, and through the arrangement of the high-frequency valve mechanism, the regulating valve mechanism, the pressure sensing mechanism and the control mechanism, the device is convenient to use. According to the device, the air pressure can be secondarily adjusted through the adjusting valve, the outlet air pressure precision of the device is improved, real-time feedback double-closed-loop control of the high-frequency valve and the adjusting valve is further achieved, and the stability of the outlet air pressure of the device is further improved.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic valve technology, specifically relating to a pressure sensing feedback dual closed-loop control electromagnetic valve. Background Technology

[0002] A solenoid valve is an automated actuator that uses electromagnetic control to open, close, and switch fluid passages. Its core consists of an electromagnetic control section and a fluid control section within the valve body, operating based on the principle of electromagnetic induction. When energized, the electromagnetic coil generates a magnetic field, driving the iron core to move the valve core axially, changing the connectivity of the flow channels within the valve body and thus enabling fluid flow to be opened, closed, or switched. After de-energization, the iron core returns to its initial position under the action of a reset element, and the valve body resumes its original flow state, completing one cycle. Its compact structure and fast response speed allow for remote control via electrical signals, eliminating the need for manual operation. It precisely matches automated control requirements, has excellent sealing performance, and is suitable for various fluid media, including gases and liquids. It is a fundamental core component for flow control in fluid control systems and is widely used in the on / off and switching control of various automated equipment and fluid pipeline systems.

[0003] Existing solenoid valves typically discharge gas directly through an exhaust port at the regulating valve outlet, lacking a back pressure energy-saving structure. When the outlet of such a solenoid valve is open, the electromagnet must maintain high power at all times to counteract the spring's restoring elasticity, resulting in high power consumption and hindering energy conservation.

[0004] Furthermore, most existing solenoid valves control fluid pressure through a single valve without a two-stage fine-tuning structure. Therefore, their fluid pressure control accuracy is relatively limited. The few solenoid valves with a two-stage fine-tuning structure do not have a dual closed-loop real-time feedback adjustment mechanism, and cannot simultaneously adjust the inlet pressure and the regulating valve according to the channel pressure. When the inlet pressure is unstable, such solenoid valves cannot guarantee the stability of the output pressure. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a pressure sensing feedback dual closed-loop control solenoid valve.

[0006] The technical solution adopted to solve the above technical problems is: a pressure sensing feedback dual closed-loop control solenoid valve, including a housing mechanism, a high-frequency valve mechanism, a first air nozzle mechanism, a regulating valve mechanism, a second air nozzle mechanism, a pressure sensing mechanism and a control mechanism. Three high-frequency valve mechanisms are installed on the housing mechanism. One end of the high-frequency valve mechanism is fixed with the first air nozzle mechanism. The regulating valve mechanism is installed on the housing mechanism. A second air nozzle mechanism is fixed on the regulating valve mechanism. The second air nozzle mechanism includes a second air nozzle body. A back pressure air chamber is opened at one end of the interior of the second air nozzle body. An anti-clogging aluminum cover is fixed on the inner side of the back pressure air chamber. A filter screen is fixed on the inner side of the anti-clogging aluminum cover. A throttling cover is attached to the top of the anti-clogging aluminum cover. A throttling hole is opened on the throttling cover. A second valve core is slidably connected to the inner side of the second air nozzle body. A fifth air passage is opened inside the second valve core. The top end of the fifth air passage is connected to multiple sixth air passages. A pressure sensing mechanism is fixedly installed on the housing mechanism, and a control mechanism is screwed into the inside of the housing mechanism. The control mechanism includes a circuit board on which a main control chip is soldered.

[0007] Furthermore, the housing mechanism includes a housing body, one end of which is sealed with a first check valve and a second check valve, and the other end of which is sealed with an outlet connector.

[0008] Through the above technical solution, the housing body can be made of stainless steel, which has high strength and corrosion resistance, and can effectively improve the service life of the device. The first one-way valve and the second one-way valve are the air inlet end, and their one-way air inlet structure can effectively prevent gas backflow.

[0009] Furthermore, the top of the housing body is provided with a first mounting groove, a second mounting groove and a third mounting groove, an insulating bracket is fixed inside the housing body, a cover plate is screwed to the bottom of the housing body, a first air passage and a second air passage are provided inside the housing body, the inner sidewall of the first mounting groove is connected to the first air passage, the bottom ends of the first mounting groove, the second mounting groove and the third mounting groove are all connected to the second air passage, the first one-way valve and the second one-way valve are connected to the first air passage, and the outlet connector is connected to the end of the second air passage.

[0010] With the above technical solution, when gas enters the device from the first one-way valve or the second one-way valve, it will enter the first mounting groove from the first gas passage, then enter the second gas passage from the first mounting groove, and finally be discharged from the outlet connector.

[0011] Furthermore, the high-frequency valve mechanism includes a first valve body that is sealed and fixed to the first mounting groove. A first proportional electromagnet is embedded and fixed inside the first valve body. A first wire is connected to the top of the first proportional electromagnet. A first iron core is slidably connected to the inner side of the first valve body. A first proportional spring is provided at one end of the first iron core, and a second proportional spring is provided at the other end of the first iron core.

[0012] Through the above technical solution, the first proportional electromagnet generates a magnetic field after passing through the band, thereby controlling the first iron core. The first proportional electromagnet can change the magnetic flux of the coil by adjusting the magnitude of the electrical signal, thereby causing the electromagnetic thrust to change continuously, driving the first iron core to make stepless displacement. Neither the first proportional spring nor the second proportional spring has ferromagnetism. The first proportional spring can provide a reverse elastic force to the first iron core, forming a dynamic balance with the electromagnetic thrust, so that the displacement of the iron core is precisely proportional to the input electrical signal, ensuring the linearity and repeatability of the displacement, while buffering the movement of the iron core, suppressing vibration, improving stability, and realizing accurate control of the position of the first iron core.

[0013] Furthermore, the first air nozzle mechanism includes a first air nozzle body fixed to the bottom end of the first valve body, a first valve core slidably connected to the inner side of the first air nozzle body, the top end of the first valve core slidably disposed inside the first iron core, and a reverse edge anti-detachment structure provided at the connection between the first valve core and the first iron core, a spring groove provided at the top of the first valve core, a plurality of third air passages arranged in a ring on the inner side of the first air nozzle body, and an air outlet provided at the bottom of the first air nozzle body.

[0014] Through the above technical solution, the first nozzle body blocks the bottom of the first mounting groove. When gas enters the second air passage from the first air passage through the first mounting groove, it needs to pass through the third air passage before it can enter the second air passage from the outlet. The first iron core can drive the first valve core to move up or down. When the first valve core moves up, there is a gap between the first valve core and the outlet, at which time gas can enter the outlet from the third air passage. When the first valve core moves down, it can block the outlet, thereby disconnecting the air path. The first iron core can finely adjust the position of the first valve core to change the size of the outlet gap, thereby adjusting the gas flow rate.

[0015] Furthermore, the regulating valve mechanism includes a second valve body sealed and fixed inside the third mounting groove, a second proportional electromagnet is embedded and fixed inside the second valve body, and a fourth air passage is opened inside the second valve body.

[0016] With the above technical solution, the bottom of the fourth air passage is the air inlet, and the bottom of the fourth air passage is connected to the second air passage. The second proportional electromagnet can adjust the position of the second iron core.

[0017] Furthermore, a second iron core is slidably connected inside the second valve body, a third proportional spring is provided at the bottom of the second iron core, a fourth proportional spring is provided inside the second iron core, and a second wire is connected to the top of the second proportional electromagnet.

[0018] Through the above technical solution, the second iron core has a hollow structure, and the airflow of the fourth air passage can pass through the interior of the second iron core. Furthermore, the second proportional electromagnet, the second iron core, the third proportional spring, and the fourth proportional spring can control the position of the second valve core through the same principle as the high-frequency valve mechanism, thereby realizing the opening and closing of the airflow and the regulation of the flow rate.

[0019] Furthermore, a pressure cap is fixed to the top of the second air nozzle body, and an exhaust port is provided on the pressure cap. The cross-sectional area of ​​the throttling orifice is smaller than the cross-sectional area of ​​the fifth air passage and the cross-sectional area of ​​the sixth air passage.

[0020] Through the above technical solution, the fifth air passage is connected to the internal channel of the second iron core. Gas from the fourth air passage can enter the fifth air passage and then enter the back pressure chamber through the sixth air passage. The back pressure chamber has a channel opening. When the second valve core moves downward, the channel opening opens, allowing the regulating valve mechanism to exhaust gas. When the second valve core moves upward, the channel opening closes, preventing the regulating valve mechanism from exhausting gas. By controlling the position of the second valve core using the second proportional electromagnet, the second iron core, the third proportional spring, and the fourth proportional spring, the exhaust rate of the regulating valve mechanism can be changed. Because the cross-sectional area of ​​the throttling orifice is smaller than that of the fifth and sixth air passages, when gas enters the back pressure chamber, back pressure is generated in the back pressure chamber due to the large air resistance at the downstream throttling orifice and the small air resistance in the fifth and sixth air passages. The back pressure can provide a certain reverse thrust to the second valve core. At this time, the second proportional electromagnet can reduce its power according to the back pressure intensity. Under the action of the back pressure, the second valve core will not reset and close, thereby reducing the energy consumption of the second proportional electromagnet and achieving energy saving. The filter screen can effectively prevent the throttling orifice from becoming clogged.

[0021] Furthermore, the pressure sensing mechanism includes a sensor body sealed and fixed inside the second mounting groove, and a pressure transmitter is fixed on the top of the sensor body, the pressure transmitter being electrically connected to the sensor body.

[0022] Through the above technical solution, the sensor body can monitor the air pressure inside the second airway, and convert the air pressure inside the second airway into a standard electrical signal and transmit it to the control mechanism through a pressure transmitter.

[0023] Furthermore, the circuit board is screwed onto an insulating bracket, and a program storage chip, a power management module, a high-precision operational amplifier chip, a driver chip, and an optocoupler are soldered onto the circuit board. The program storage chip, the high-precision operational amplifier chip, and the driver chip are all electrically connected to the main control chip. The main control chip and the driver chip are all electrically connected to the first proportional electromagnet, the second proportional electromagnet, and the pressure transmitter.

[0024] Through the above technical solutions, the main control chip can receive pressure sensor feedback signals, compare them with set values, and adjust the solenoid valve drive signals. The program storage chip can store the program instructions and parameters for solenoid valve control, providing the basis for the main control chip's operation, ensuring stable execution of control logic, and that parameters can be fixed and retrieved. The high-precision operational amplifier chip can amplify the weak electrical signals from the pressure sensor, suppress interference, and improve signal accuracy, providing the main control chip with stable and reliable sampling feedback signals. The driver chip can amplify the weak control signals from the main control chip, providing sufficient drive power to accurately drive the first and second proportional electromagnets, realizing the conversion of electrical signals into mechanical actions. The power management module can provide stable and compatible voltage and current to each chip, sensor, and electromagnet, stabilizing, filtering, and distributing power to ensure reliable system operation. The optocoupler isolation device can achieve electrical isolation of the circuit, blocking high and low voltage. To mitigate interference, transmit control signals, protect the main control chip, and enhance system anti-interference and security, the control mechanism adjusts the opening and closing of the high-frequency valve mechanism and the regulating valve mechanism based on the air pressure in the second air passage. When the air pressure in the second air passage is lower than the preset air pressure, the control mechanism increases the intake air volume of the high-frequency valve mechanism while decreasing the exhaust air volume of the regulating valve mechanism, thereby increasing the outlet air pressure at the outlet connector. Conversely, when the air pressure in the second air passage is higher than the preset air pressure, the control mechanism decreases the intake air volume of the high-frequency valve mechanism and increases the exhaust air volume of the regulating valve mechanism. This achieves dual closed-loop control of the high-frequency valve mechanism and the regulating valve mechanism. Not only can the intake air pressure of the device be adjusted through the high-frequency valve mechanism, and the internal air pressure of the device be fine-tuned through the regulating valve mechanism, but the dual closed-loop control of the high-frequency valve mechanism and the regulating valve mechanism can also further ensure the stability of the outlet air pressure at the outlet connector.

[0025] The beneficial effects of this invention are as follows: 1. By setting up a regulating valve mechanism and a second air nozzle mechanism, the present invention enables the device to generate back pressure at the outlet air nozzle end of the regulating valve, thereby reducing the power of the electromagnet after the regulating valve is opened, effectively reducing the energy consumption of the device. 2. By incorporating a high-frequency valve mechanism, a regulating valve mechanism, a pressure sensing mechanism, and a control mechanism, this invention enables the device to perform secondary regulation of the air pressure through the regulating valve, thereby improving the accuracy of the outlet air pressure. Furthermore, it achieves real-time feedback dual closed-loop control of the high-frequency valve and the regulating valve, further enhancing the stability of the outlet air pressure of the device. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a partial cross-sectional view of the housing mechanism of the present invention; Figure 4 This is a partial cross-sectional view of the high-frequency valve mechanism and the first air nozzle mechanism of the present invention; Figure 5 This is a partial cross-sectional view of the first air nozzle mechanism of the present invention; Figure 6 This is a partial cross-sectional view of the second air nozzle mechanism of the present invention; Figure 7 This is a partial cross-sectional view of the second air nozzle mechanism of the present invention; Figure 8 This is a three-dimensional structural diagram of the control mechanism of the present invention.

[0027] Reference numerals: 1. Housing mechanism; 101. Housing body; 102. First one-way valve; 103. Second one-way valve; 104. Outlet connector; 105. First mounting slot; 106. Second mounting slot; 107. Third mounting slot; 108. Insulating bracket; 109. Cover plate; 110. First air passage; 111. Second air passage; 2. High-frequency valve mechanism; 201. First valve body; 202. First proportional electromagnet; 203. First wire; 204. First proportional spring; 205. First iron core; 206. Second proportional spring; 3. First air nozzle mechanism; 301. First air nozzle body; 302. First valve core; 303. Spring groove; 304. Third air passage; 305. Air outlet; 4. Regulating valve mechanism; 401. Second valve body; 402. Second proportional electromagnet 403 Magnet; 404 Fourth air passage; 405 Third proportional spring; 406 Second iron core; 407 Fourth proportional spring; 408 Second wire; 5. Second air nozzle mechanism; 501 Second air nozzle body; 502 Back pressure air chamber; 503 Anti-clogging aluminum cover; 504 Filter screen; 505 Throttling cover; 506 Throttling orifice; 507 Second valve core; 508 Fifth air passage; 509 Sixth air passage; 510 Pressure cap; 511 Exhaust port; 6. Pressure sensing mechanism; 601 Sensor body; 602 Pressure transmitter; 7. Control mechanism; 701 Circuit board; 702 Main control chip; 703 Program storage chip; 704 Power management module; 705 High-precision operational amplifier chip; 706 Driver chip; 707 Optocoupler isolation device. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] like Figures 1-8As shown, a pressure-sensing feedback dual closed-loop control solenoid valve includes a housing mechanism 1, a high-frequency valve mechanism 2, a first air nozzle mechanism 3, a regulating valve mechanism 4, a second air nozzle mechanism 5, a pressure sensing mechanism 6, and a control mechanism 7. The housing mechanism 1 includes a housing body 101. One end of the housing body 101 is sealed with a first one-way valve 102 and a second one-way valve 103, and the other end of the housing body 101 is sealed with an outlet connector 104. The top of the housing body 101 has a first mounting groove 105, a second mounting groove 106, and a third mounting groove 107. An insulating bracket 108 is fixed inside the housing body 101. A cover plate 109 is screwed to the bottom of the housing body 101. The inside of the housing body 101 has a first air passage 110 and a second air passage 111. The inner sidewall of the first mounting groove 105 is connected to the first... The air passages 110 are interconnected. The bottom ends of the first mounting groove 105, the second mounting groove 106, and the third mounting groove 107 are all connected to the second air passage 111. The first one-way valve 102 and the second one-way valve 103 are connected to the first air passage 110. The outlet connector 104 is connected to the end of the second air passage 111. The housing body 101 can be made of stainless steel, which has high strength and corrosion resistance, and can effectively improve the service life of the device. The first one-way valve 102 and the second one-way valve 103 are the air inlet ends. Their one-way air inlet structure can effectively prevent gas backflow. When gas enters the device from the first one-way valve 102 or the second one-way valve 103, it will enter the first mounting groove 105 from the first air passage 110, then enter the second air passage 111 from the first mounting groove 105, and finally be discharged from the outlet connector 104.

[0030] like Figure 2 and Figure 4As shown, three high-frequency valve mechanisms 2 are installed on the housing mechanism 1. Each high-frequency valve mechanism 2 includes a first valve body 201 sealed and fixed to the first mounting groove 105. A first proportional electromagnet 202 is embedded and fixed inside the first valve body 201. A first wire 203 is connected to the top of the first proportional electromagnet 202. A first iron core 205 is slidably connected to the inner side of the first valve body 201. A first proportional spring 204 is provided at one end of the first iron core 205, and a second proportional spring 206 is provided at the other end of the first iron core 205. A first proportional spring 204 is provided at one end of the iron core 205, and a second proportional spring 206 is provided at the other end of the first iron core 205. When the first proportional electromagnet 202 passes through the circuit, it generates a magnetic field, thereby controlling the first iron core 205. The first proportional electromagnet 202 can change the magnetic flux of the coil by adjusting the magnitude of the electrical signal, thereby causing the electromagnetic thrust to change continuously, driving the first iron core 205 to make stepless displacement. Neither the first proportional spring 204 nor the second proportional spring 206 has ferromagnetism. The first proportional spring 204 can provide the first iron core 205 with a reverse elastic force, forming a dynamic balance with the electromagnetic thrust, so that the iron core displacement is precisely proportional to the input electrical signal, ensuring displacement linearity and repeatability accuracy, while buffering the iron core movement, suppressing vibration, improving stability, and realizing accurate control of the position of the first iron core 205.

[0031] like Figure 2 , Figure 4 and Figure 5As shown, a first air nozzle mechanism 3 is fixed to one end of the high-frequency valve mechanism 2. The first air nozzle mechanism 3 includes a first air nozzle body 301 fixed to the bottom end of the first valve body 201. A first valve core 302 is slidably connected to the inner side of the first air nozzle body 301. The top end of the first valve core 302 is slidably disposed inside the first iron core 205. A reverse edge anti-detachment structure is provided at the connection between the first valve core 302 and the first iron core 205. A spring groove 303 is provided on the top of the first valve core 302. Multiple third air passages 304 are arranged in a ring on the inner side of the first air nozzle body 301. An air outlet 305 is provided at the bottom of the first air nozzle body 301. The first air nozzle body 301 blocks the bottom of the first mounting groove 105. When gas flows from... When the first air passage 110 enters the second air passage 111 through the first mounting groove 105, it needs to pass through the third air passage 304 before it can enter the second air passage 111 through the outlet 305. The first iron core 205 can drive the first valve core 302 to move up or down. When the first valve core 302 moves up, there is a gap between the first valve core 302 and the outlet 305. At this time, gas can enter the outlet 305 through the third air passage 304. When the first valve core 302 moves down, it can block the outlet 305, thereby disconnecting the air passage. The first iron core 205 can finely adjust the position of the first valve core 302 to change the size of the gap in the outlet 305, thereby regulating the gas flow rate.

[0032] like Figure 2 and Figure 6 As shown, a regulating valve mechanism 4 is installed on the housing mechanism 1. The regulating valve mechanism 4 includes a second valve body 401 sealed and fixed inside the third mounting groove 107. A second proportional electromagnet 402 is embedded and fixed inside the second valve body 401. A fourth air passage 403 is opened inside the second valve body 401. A second iron core 405 is slidably connected inside the second valve body 401. A third proportional spring 404 is provided at the bottom of the second iron core 405. A fourth proportional spring 406 is provided inside the second iron core 405. The top of the second proportional electromagnet 402... The second wire 407 is connected to the end of the fourth air passage 403, which is the bottom of the air inlet. The bottom of the fourth air passage 403 is connected to the second air passage 111. The second proportional electromagnet 402 can adjust the position of the second iron core 405. The second iron core 405 is a hollow structure. The second proportional electromagnet 402, the second iron core 405, the third proportional spring 404 and the fourth proportional spring 406 can control the position of the second valve core 507 through the same principle as the high-frequency valve mechanism 2, thereby realizing the opening and closing of the airflow and the regulation of the flow rate.

[0033] like Figure 2 , Figure 6 and Figure 7As shown, a second air nozzle mechanism 5 is fixed on the regulating valve mechanism 4. The second air nozzle mechanism 5 includes a second air nozzle body 501. A back pressure air chamber 502 is opened at one end of the second air nozzle body 501. An anti-clogging aluminum cover 503 is fixed to the inner side of the back pressure air chamber 502. A filter screen 504 is fixed to the inner side of the anti-clogging aluminum cover 503. A throttling cover 505 is attached to the top of the anti-clogging aluminum cover 503. A throttling hole 506 is opened on the throttling cover 505. A second valve core 507 is slidably connected to the inner side of the second air nozzle body 501. A fifth valve core 507 is opened inside the second valve core 507. The top of the fifth air passage 508 is connected to multiple sixth air passages 509. A pressure cap 510 is fixed to the top of the second air nozzle body 501. An exhaust port 511 is provided on the pressure cap 510. The cross-sectional area of ​​the throttling orifice 506 is smaller than the cross-sectional areas of the fifth air passage 508 and the sixth air passages 509. The fifth air passage 508 is connected to the internal channel of the second iron core 405. Gas from the fourth air passage 403 can enter the fifth air passage 508 and then enter the back pressure chamber 502 through the sixth air passages 509. A passage is provided in the back pressure chamber 502. When the second valve core 507 moves downward, the passage opens, allowing the regulating valve mechanism 4 to exhaust gas. When the second valve core 507 moves upward, the passage closes, preventing the regulating valve mechanism 4 from exhausting gas. By controlling the position of the second valve core 507 through the second proportional electromagnet 402, the second iron core 405, the third proportional spring 404, and the fourth proportional spring 406, the exhaust rate of the regulating valve mechanism 4 can be changed. Since the cross-sectional area of ​​the throttling orifice 506 is smaller than that of the fifth air passage 508 and the sixth air passage 509, When gas enters the back pressure chamber 502, due to the large air resistance at the downstream throttling orifice 506 and the small air resistance at the fifth air passage 508 and the sixth air passage 509, back pressure is generated in the back pressure chamber 502. The back pressure can provide a certain reverse thrust to the second valve core 507. At this time, the second proportional electromagnet 402 can reduce its power according to the back pressure intensity. Under the action of the back pressure, the second valve core 507 will not reset and close, thereby reducing the energy consumption of the second proportional electromagnet 402 and achieving energy saving. The filter screen 504 can effectively prevent the throttling orifice 506 from being blocked.

[0034] like Figure 1 and Figure 2 As shown, a pressure sensing mechanism 6 is fixedly installed on the housing mechanism 1. The pressure sensing mechanism 6 includes a sensor body 601 sealed and fixed inside the second mounting groove 106. A pressure transmitter 602 is fixed on the top of the sensor body 601. The pressure transmitter 602 is electrically connected to the sensor body 601. The sensor body 601 can monitor the air pressure inside the second air passage 111 and convert the air pressure inside the second air passage 111 into a standard electrical signal through the pressure transmitter 602 and transmit it to the control mechanism 7.

[0035] like Figure 2and Figure 8 As shown, a control mechanism 7 is screwed into the interior of the housing mechanism 1. The control mechanism 7 includes a circuit board 701, on which a main control chip 702 is soldered. The circuit board 701 is screwed onto an insulating bracket 108. A program storage chip 703, a power management module 704, a high-precision operational amplifier chip 705, a driver chip 706, and an optocoupler isolation device 707 are soldered onto the circuit board 701. The program storage chip 703, the high-precision operational amplifier chip 705, and the driver chip 706 are all electrically connected to the main control chip 702. The main control chip 702, the driver chip 706, the first proportional electromagnet 202, the second proportional electromagnet 402, and the pressure transmitter 6 are all connected to the main control chip 702. 02 are electrically connected. The main control chip 702 can receive pressure sensor feedback signals, compare them with set values, and adjust the solenoid valve drive signal. The program storage chip 703 can store the program instructions and parameters for solenoid valve control, providing the operating basis for the main control chip 702, ensuring stable execution of control logic, and that parameters can be fixed and retrieved. The high-precision operational amplifier chip 705 can amplify the weak electrical signal from the pressure sensor, suppress interference, and improve signal accuracy, providing a stable and reliable sampling feedback signal for the main control chip 702. The driver chip 706 can amplify the weak control signal from the main control chip 702, providing sufficient drive power to accurately drive the first proportional electromagnet 202. The operation of the second proportional electromagnet 402 converts electrical signals into mechanical actions. The power management module 704 provides stable and compatible voltage and current to each chip, sensor, and electromagnet, stabilizing, filtering, and distributing power to ensure reliable system operation. The optocoupler isolation device 707 provides electrical isolation to the circuit, blocks high and low voltage interference, transmits control signals, protects the main control chip 702, and improves the system's anti-interference and safety. In summary, the control mechanism 7 can adjust the opening and closing degree of the high-frequency valve mechanism 2 and the regulating valve mechanism 4 according to the air pressure in the second air passage 111. When the air pressure in the second air passage 111 is lower than the preset air pressure, the control mechanism 7 can increase the high-frequency valve opening. The high-frequency valve mechanism 2 reduces the intake air volume, while the regulating valve mechanism 4 reduces the exhaust air volume, thereby increasing the outlet air pressure at the outlet connector 104. Conversely, when the air pressure in the second air passage 111 is higher than the preset air pressure, the control mechanism 7 reduces the intake air volume of the high-frequency valve mechanism 2 and increases the exhaust air volume of the regulating valve mechanism 4, thus realizing dual closed-loop control of the high-frequency valve mechanism 2 and the regulating valve mechanism 4. Not only can the intake air pressure of the device be regulated by the high-frequency valve mechanism 2, and the internal air pressure of the device be fine-tuned by the regulating valve mechanism 4, but the dual closed-loop control of the high-frequency valve mechanism 2 and the regulating valve mechanism 4 can also further ensure the stability of the outlet air pressure at the outlet connector 104.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A pressure-sensing feedback dual closed-loop control solenoid valve, comprising a housing mechanism (1), a high-frequency valve mechanism (2), a first air nozzle mechanism (3), a regulating valve mechanism (4), a second air nozzle mechanism (5), a pressure sensing mechanism (6), and a control mechanism (7), characterized in that: Three high-frequency valve mechanisms (2) are installed on the housing mechanism (1), one end of the high-frequency valve mechanism (2) is fixed with a first air nozzle mechanism (3), and a regulating valve mechanism (4) is installed on the housing mechanism (1). The regulating valve mechanism (4) is fixed with a second air nozzle mechanism (5). The second air nozzle mechanism (5) includes a second air nozzle body (501). A back pressure air chamber (502) is opened at one end of the second air nozzle body (501). An anti-clogging aluminum cover (503) is fixed on the inner side of the back pressure air chamber (502). A filter screen (504) is fixed on the inner side of the anti-clogging aluminum cover (503). A throttling cover (505) is attached to the top of the anti-clogging aluminum cover (503). A throttling hole (506) is opened on the throttling cover (505). A second valve core (507) is slidably connected to the inner side of the second air nozzle body (501). A fifth air passage (508) is opened inside the second valve core (507). A plurality of sixth air passages (509) are connected to the top of the fifth air passage (508). A pressure sensing mechanism (6) is fixedly installed on the housing mechanism (1). A control mechanism (7) is screwed into the inside of the housing mechanism (1). The control mechanism (7) includes a circuit board (701). A main control chip (702) is soldered on the circuit board (701).

2. The pressure-sensing feedback dual closed-loop control solenoid valve according to claim 1, characterized in that, The housing mechanism (1) includes a housing body (101), one end of which is sealed with a first check valve (102) and a second check valve (103), and the other end of which is sealed with an outlet connector (104).

3. The pressure-sensing feedback dual closed-loop control solenoid valve according to claim 2, characterized in that, The top of the housing body (101) is provided with a first mounting groove (105), a second mounting groove (106) and a third mounting groove (107). An insulating bracket (108) is fixed inside the housing body (101). A cover plate (109) is screwed to the bottom of the housing body (101). The inside of the housing body (101) is provided with a first air passage (110) and a second air passage (111). The inner side wall of the first mounting groove (105) is connected to the first air passage (110). The bottom ends of the first mounting groove (105), the second mounting groove (106) and the third mounting groove (107) are all connected to the second air passage (111). The first one-way valve (102) and the second one-way valve (103) are connected to the first air passage (110). The outlet connector (104) is connected to the end of the second air passage (111).

4. The pressure-sensing feedback dual closed-loop control solenoid valve according to claim 3, characterized in that, The high-frequency valve mechanism (2) includes a first valve body (201) sealed and fixed to the first mounting groove (105). A first proportional electromagnet (202) is embedded and fixed inside the first valve body (201). A first wire (203) is connected to the top of the first proportional electromagnet (202). A first iron core (205) is slidably connected to the inner side of the first valve body (201). A first proportional spring (204) is provided at one end of the first iron core (205), and a second proportional spring (206) is provided at the other end of the first iron core (205).

5. The pressure-sensing feedback dual closed-loop control solenoid valve according to claim 4, characterized in that, The first air nozzle mechanism (3) includes a first air nozzle body (301) fixed to the bottom of the first valve body (201). A first valve core (302) is slidably connected to the inner side of the first air nozzle body (301). The top of the first valve core (302) is slidably disposed inside the first iron core (205). A reverse edge anti-detachment structure is provided at the connection between the first valve core (302) and the first iron core (205). A spring groove (303) is provided on the top of the first valve core (302). A plurality of third air passages (304) are arranged in a ring on the inner side of the first air nozzle body (301). An air outlet (305) is provided at the bottom of the first air nozzle body (301).

6. The pressure-sensing feedback dual closed-loop control solenoid valve according to claim 3, characterized in that, The regulating valve mechanism (4) includes a second valve body (401) sealed and fixed inside the third mounting groove (107), a second proportional electromagnet (402) is embedded and fixed inside the second valve body (401), and a fourth air passage (403) is opened inside the second valve body (401).

7. The pressure-sensing feedback dual closed-loop control solenoid valve according to claim 6, characterized in that, The second valve body (401) is slidably connected to a second iron core (405), a third proportional spring (404) is provided at the bottom of the second iron core (405), a fourth proportional spring (406) is provided inside the second iron core (405), and a second wire (407) is connected to the top of the second proportional electromagnet (402).

8. The pressure-sensing feedback dual closed-loop control solenoid valve according to claim 1, characterized in that, The top of the second air nozzle body (501) is fixed with a pressure cap (510), and an exhaust port (511) is opened on the pressure cap (510). The cross-sectional area of ​​the throttling orifice (506) is smaller than the cross-sectional area of ​​the fifth air passage (508) and the sixth air passage (509).

9. A pressure-sensing feedback dual closed-loop control solenoid valve according to claim 3, characterized in that, The pressure sensing mechanism (6) includes a sensor body (601) sealed and fixed inside the second mounting groove (106), and a pressure transmitter (602) is fixed on the top of the sensor body (601), and the pressure transmitter (602) is electrically connected to the sensor body (601).

10. A pressure-sensing feedback dual closed-loop control solenoid valve according to claim 1, characterized in that, The circuit board (701) is screwed onto the insulating bracket (108). The circuit board (701) is soldered with a program storage chip (703), a power management module (704), a high-precision operational amplifier chip (705), a driver chip (706), and an optocoupler isolation device (707). The program storage chip (703), the high-precision operational amplifier chip (705), and the driver chip (706) are all electrically connected to the main control chip (702). The main control chip (702) and the driver chip (706) are all electrically connected to the first proportional electromagnet (202), the second proportional electromagnet (402), and the pressure transmitter (602).

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