A dual-redundant solenoid valve based on high-frequency pulse width modulation

Abstract

This invention discloses a dual-redundant solenoid valve based on high-frequency pulse width modulation, relating to the field of solenoid valve technology. The dual-redundant solenoid valve includes a housing with a closed cover plate connected to it by screws. An inner wall tube assembly and a control chamber are disposed within the housing. An iron core is disposed within the inner wall tube assembly, and a coil assembly is disposed within the control chamber. A push rod is disposed at the end of the iron core away from the closed cover plate, and a telescopic spring is disposed on the push rod. The two ends of the telescopic spring are connected to the push rod and the inner wall tube assembly, respectively. A multi-frequency connector is disposed on the housing and electrically connected to the coil assembly via wires. A valve seat assembly is disposed at the bottom of the housing. A double ball joint is disposed at the end of the push rod away from the closed cover plate, and the double ball joint slides in contact with the valve seat assembly. This invention features high fluid transmission safety, long component service life, and good fluid contamination prevention performance.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve technology, specifically a dual-redundant solenoid valve based on high-frequency pulse width modulation. Background Technology

[0002] Solenoid valves are electromagnetically controlled industrial devices used to control fluids. Different solenoid valves play different roles in the control system, and there are many types of solenoid valves. When selecting a solenoid valve, it is necessary to follow principles such as safety and applicability. Most importantly, the type of valve should be selected based on the specific working conditions. Therefore, they are often used in fluid control applications that control water, air, oil, or gas.

[0003] Due to their automated nature, solenoid valves are highly useful for engineers. By using solenoid valves, engineers no longer need to operate the valves manually, as they can be used in places where automatic control and monitoring of gas are required. However, because of this, the internal coil assembly is usually a consumable part, and the coil is prone to damage, resulting in the inability to generate magnetism. Therefore, engineers usually add an extra coil as a backup, just in case. However, the use of a backup coil is not perfect, and there is a possibility that the magnetic force generation is unstable, or that the closing is too slow, leading to fluid contamination. These problems need to be effectively solved. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-redundant solenoid valve based on high-frequency pulse width modulation to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a technical solution for a dual-redundant solenoid valve, comprising a housing with a sealing cover plate connected to it by screws. An inner wall tube assembly and a control chamber are disposed within the housing. An iron core is disposed within the inner wall tube assembly, and a coil assembly is disposed within the control chamber. A push rod is disposed at the end of the iron core away from the sealing cover plate, and a telescopic spring is disposed on the push rod. The two ends of the telescopic spring are connected to the push rod and the inner wall tube assembly, respectively. A multi-frequency connector is disposed on the housing and electrically connected to the coil assembly via wires. A valve seat assembly is disposed at the bottom of the housing. A double ball joint is disposed at the end of the push rod away from the sealing cover plate, and the double ball joint slides in contact with the valve seat assembly. When the solenoid valve is in operation, the wideband connector and the multi-frequency connector must first be connected, followed by the wideband... The connector transmits electrical signals to the multi-frequency connector, which then converts the signals. The coil assembly activates, causing the iron core to generate magnetic force, which moves the push rod and indirectly moves the double ball rod within the valve seat assembly, controlling the connection between the valve seat assemblies. A telescopic spring allows the push rod to automatically reset. When power is off, the telescopic spring acts on the push rod, restricting the connection of the valve seat assemblies. When the solenoid valve is energized, the iron core, under the influence of the magnetic field, moves the push rod downward, connecting the valve seat assemblies. The multi-frequency connector is typically controlled by a fixed frequency (10Hz) duty cycle signal. Adjusting the duty cycle corresponds to different output pressures. The closed cover design ensures that the iron core does not rotate significantly during the reciprocating motion of the inner wall tube assembly, improving product lifespan and stability.

[0007] The inner wall tube assembly includes a support tube, with a magnetic shielding ring at the lower end of the support tube. The upper end of the magnetic shielding ring is connected to the support tube, and the lower end of the magnetic shielding ring is connected to an armature seat. The height ratio of the inner wall tube assembly (H), the armature seat (A), the armature seat step surface (B), the magnetic shielding ring (C), and the inner wall tube (D) is (20:12:11:4:4) to (20:13:12:5:5). The vertical air gap between the iron core and the inner wall tube assembly is 0.5 to 1 mm. This relative position will determine that the coil assembly generates the same magnetic force. By generating the same electromagnetic force on the iron core through two sets of coils in different positions, the same action effect can be achieved, thereby ensuring the normal operation of the product and better conforming to the magnetic force effect generated by multiple frequency bands.

[0008] The coil assembly is fitted onto the inner wall tube assembly. The coil assembly includes a coil frame, which is fitted onto the support tube. The coil assembly also includes a first coil and a second coil, which are respectively fitted onto the coil frame. The first coil and the second coil are electrically connected to the multi-frequency connector. A sealing cover is provided on the coil frame, which is fitted onto the first coil and the second coil. The coil frame is responsible for supporting the first coil and the second coil. The first coil and the second coil are responsible for generating magnetic force, and the frequency of their generation is related to the magnetic force. During normal operation, the first coil is mainly used. When the first coil fails, the second coil 18 is switched to continue working. When the magnetic force generated by the first coil is insufficient, the first coil and the second coil can be started simultaneously to ensure the best working condition. The sealing cover is responsible for the safety of the first coil and the second coil.

[0009] The valve seat assembly includes a connecting valve seat, which is connected to the housing. The connecting valve seat is provided with an air inlet valve seat and an air inlet. The connecting valve seat is provided with a first exhaust port and a second exhaust port. A locking assembly is provided inside the connecting valve seat. A connecting cavity is provided between the connecting valve seat and the air inlet valve seat. A double ball rod passes through the connecting cavity and slides in contact with the connecting cavity. The connecting valve seat and the air inlet valve seat cooperate with each other to achieve the effect of air delivery. Under normal circumstances, the air inlet and the first air inlet are connected, which is the energized state. When the power is off, the first exhaust port and the second exhaust port of the connecting valve seat are connected to achieve the pressure relief operation.

[0010] The double-ball valve includes a connecting rod that connects to a top rod. The connecting rod is equipped with a ceramic ball and a connecting ball. The upper and lower ends of the connecting cavity are respectively provided with an obstruction groove and a connecting groove. The ceramic ball slides in contact with the obstruction groove, and the connecting ball slides in contact with the connecting groove. A locking assembly is fitted onto the connecting rod and connected to it. During the control of gas supply and depressurization, the ceramic ball and connecting ball provide control. The connecting rod is driven by the top rod, and the direction of fluid output is determined by whether or not it contacts the obstruction groove and the connecting groove. This design ensures precise control of the airflow path by the solenoid valve in both energized and de-energized states, achieving effective regulation of the output pressure.

[0011] A return spring is installed inside the air intake valve seat, and a return slot is installed on the connecting rod. The two ends of the return spring abut against the return slot and the air intake valve seat, respectively. A locking groove is installed inside the connecting valve seat, and a locking assembly is installed inside the locking groove. The locking assembly includes multiple sealed rubber blocks and sealing springs. The two ends of the sealing springs are connected to the corresponding sealed rubber blocks and locking grooves, respectively. A sealing wheel is installed on the locking groove. The sealing wheel and the connecting rod are engaged by teeth. When the air is delivered, the return spring also abuts against the return slot, which allows the connecting rod to return to its original position in time, reducing stress damage to the connecting rod and the push rod, and extending the service life of the equipment. The locking assembly can fully clamp the connecting rod, which can prevent the transmission fluid from being contaminated at the moment of pressure release, thus ensuring the safety of the transmission fluid. It also reduces the problem of dust and other obstructions caused by backflow, which can lead to incomplete closure of the connecting ball and the connecting groove.

[0012] A sliding wedge ring is provided on the connecting rod, which slides in contact with the sealing rubber block. The sealing wheel is provided with a release groove and a blocking groove. The sealing rubber blocks are arranged in an array along the axis of the connecting rod. When the sealing rubber block is in contact with the connecting rod, the release groove is parallel to the sealing rubber block. When the sealing rubber block is not in contact with the connecting rod, the blocking groove abuts against the sealing rubber block. When locking, the connecting ball and the connecting groove need to be in a closed state. Driven by the connecting rod, the sealing wheel rotates, and the release groove will be parallel to the sealing rubber block. At this time, the sealing rubber block will be released. Under the action of the sealing spring, the sealing rubber block will pop out instantly and press against the connecting rod. All the sealing rubber blocks will form a complete circle, thus completing the locking. When locking is not needed, the sealing rubber block is sent back into the locking groove under the action of the sliding wedge ring and blocked by the blocking groove, so as not to obstruct the connection between the air intake and the first exhaust port. At the same time, the sealing rubber block also plays a buffering role.

[0013] A sensing component is provided on the connecting valve seat. The sensing component includes a sensing groove. A sensing groove is provided on the first exhaust port and the second exhaust port respectively. A sensing plate is provided in the sensing groove. The sensing plate and the sensing groove are rotatably connected by a spring shaft. A transmission gear is provided on the sensing plate. An angle sensor is provided in the sensing groove. The angle sensor is electrically connected to the multi-frequency connector through a wire. When the first exhaust port and the second exhaust port are working, the sensing plate will sense the fluid flow rate and transmit it to the sensing plate. The sensing plate will drive the transmission gear to rotate. The transmission gear will transmit the swing angle to the angle sensor. The angle sensor can transmit the fluid impact force at this time, indirectly obtain the fluid flow rate, and transmit the deflection information to the multi-frequency connector.

[0014] When the deflection angle α of the angle sensor is greater than or equal to 60°, it indicates that the current flows smoothly in the first coil and the fluid resistance is not significant. At this time, the first and second coils work separately, and only one coil is needed to complete the opening and closing operation. When the deflection angle α of the angle sensor is less than 60°, since the first coil is the default operating coil, it is known that the first coil has a problem or the fluid flow is not smooth. In order to avoid accidents, the first and second coils work together to enhance the magnetic force of the iron core, force the closure, and notify the subsequent operators to carry out maintenance.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention employs a coil structure assembly with double insurance, providing multiple layers of protection. While ensuring stable operation, it also allows for emergency handling in case of unforeseen circumstances. If a single coil is damaged, it can be promptly repaired. The multi-frequency input ensures that both the backup coil and the main coil can function effectively. The locking assembly also guarantees that the fluid being transported will not become contaminated. During depressurization or supply, the locking assembly reacts quickly, cutting off any potential contamination and providing a buffering effect to prevent sudden increases in internal fluid pressure that could shorten the equipment's lifespan. Furthermore, this invention incorporates a warning-type sensing component that automatically adjusts the coil's operating state based on the current fluid flow conditions, adapting to various fluid transport applications. Attached Figure Description

[0017] Figure 1 This is a three-dimensional top view structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of a three-dimensional bottom-view structure according to the present invention;

[0019] Figure 3 This is a top view schematic diagram of the structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0021] Figure 5 for Figure 4 A partially enlarged schematic diagram of structure A;

[0022] Figure 6 for Figure 4 A magnified schematic diagram of the B structure;

[0023] Figure 7 This is a schematic diagram of the height ratio structure of the inner wall tube assembly of the present invention;

[0024] Figure 8 This is a schematic diagram of the locking assembly structure of the present invention;

[0025] In the diagram: 1. Through the housing; 2. Closed cover; 3. Inner wall tube assembly; 301. Support tube; 302. Magnetic shielding ring; 303. Armature seat; 4. Control chamber; 5. Iron core; 6. Coil assembly; 601. Coil frame; 602. First coil; 603. Second coil; 604. Sealing cover; 7. Push rod; 8. Telescopic spring; 9. Multi-frequency connector; 10. Valve seat assembly; 1001. Connecting valve seat; 1002. Inlet valve seat; 1003. Inlet; 1004. First exhaust port; 1005. Second exhaust port; 1006. Return spring; 1007. Locking groove; 11. Double ball bar; 1101. Connecting rod; 1102. Ceramic ball; 1103. Connecting ball; 1104. Reset slot; 1105. Sliding wedge ring; 12. Locking assembly; 1201. Enclosed rubber block; 1202. Enclosed spring; 1203. Enclosed wheel; 1204. Release groove; 1205. Blocking slot; 13. Connecting cavity; 1301. Obstruction groove; 1302. Connecting groove; 14. Sensing assembly; 1401. Sensing groove; 1403. Sensing piece; 1404. Transmission gear; 1405. Angle sensor. Detailed Implementation

[0026] 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.

[0027] Example: Figures 1-8As shown, the present invention provides a technical solution. The dual-redundant solenoid valve includes a housing 1, a sealing cover 2 on the housing 1, and the sealing cover 2 connected to the housing 1 by screws. An inner wall tube assembly 3 and a control chamber 4 are disposed within the housing 1. An iron core 5 is disposed within the inner wall tube assembly 3, and a coil assembly 6 is disposed within the control chamber 4. A push rod 7 is disposed at the end of the iron core 5 away from the sealing cover 2, and a telescopic spring 8 is disposed on the push rod 7. The two ends of the telescopic spring 8 are respectively connected to the push rod 7 and the inner wall tube assembly 3. A multi-frequency connector 9 is disposed on the housing 1 and electrically connected to the coil assembly 6 via a wire. A valve seat assembly 10 is disposed at the bottom of the housing 1. A double ball rod 11 is disposed at the end of the push rod 7 away from the sealing cover 2, and the double ball rod 11 slides in contact with the valve seat assembly 10. When the solenoid valve is in operation, the wideband connector and the multi-frequency connector 9 must first be connected. The connection is established, and then the broadband connector transmits an electrical signal to the multi-frequency connector 9. The multi-frequency connector 9 will convert the signal, and the coil assembly 6 will work, thereby causing the iron core 5 to generate magnetic force, which drives the push rod 7 to move, indirectly driving the double ball rod 11 to move within the valve seat assembly 10, controlling the connection state between the valve seat assemblies 10. The telescopic spring 8 can realize the automatic reset of the push rod 7. When the power is off, the telescopic spring 8 acts on the push rod 7, restricting the connection of the valve seat assembly 10. When the solenoid valve is energized, the iron core 5 drives the push rod 7 to move downward under the action of the magnetic field force, and the valve seat assembly 10 will be connected. The multi-frequency connector 9 is usually controlled by a fixed frequency (10Hz) duty cycle signal. The adjustment of the duty cycle corresponds to different output pressures. Through the design of the closed cover plate 2, it is ensured that the iron core 5 will not rotate significantly during the reciprocating motion of the inner wall tube assembly 3, improving product life and stability.

[0028] The inner wall tube assembly 3 includes a support tube 301. A magnetic shielding ring 302 is provided at the lower end of the support tube 301. The upper end of the magnetic shielding ring 302 is connected to the support tube 301, and the lower end of the magnetic shielding ring 302 is connected to an armature seat 303. The height ratio of the inner wall tube assembly 3 (H): the armature seat 303 (A): the armature seat 303 (B): the step surface of the armature seat 303 (B): the magnetic shielding ring 302 (C): the inner wall tube (D) is (20:12:11:4:4) to (20:13:12:5:5). The vertical air gap between the iron core 5 and the inner wall tube assembly 3 is 0.5 to 1 mm. This relative position will determine that the coil assembly 6 generates the same magnetic force. By generating the same electromagnetic force on the iron core 5 through two sets of coils in different positions, the same action effect can be achieved, thereby ensuring the normal working state of the product and better conforming to the magnetic force effect generated by multiple frequency bands.

[0029] The coil assembly 6 is fitted onto the inner wall tube assembly 3. The coil assembly 6 includes a coil frame 601, which is fitted onto the support tube 301. The coil assembly 6 also includes a first coil 602 and a second coil 603, which are respectively fitted onto the coil frame 601 and electrically connected to the multi-frequency connector 9. A sealing cover 604 is provided on the coil frame 601, which is fitted onto the first coil 602 and the second coil 603. The coil frame 601 is responsible for supporting the first coil 602 and the second coil 603. Coil 602 and second coil 603 are responsible for generating magnetic force, and the frequency of their generation is related to the magnetic force. During normal operation, first coil 602 is mainly used. When first coil 602 fails, it switches to second coil 603 to continue working. When the magnetic force generated by first coil 602 is insufficient, both first coil 602 and second coil 603 can be started simultaneously to ensure optimal working condition. Sealing cover 604 is responsible for the safety of first coil 602 and second coil 603.

[0030] The valve seat assembly 10 includes a connecting valve seat 1001, which is connected to the housing 1. The connecting valve seat 1001 is provided with an intake valve seat 1002, which is provided with an intake port 1003. The connecting valve seat 1001 is provided with a first exhaust port 1004 and a second exhaust port 1005. A locking assembly 12 is provided inside the connecting valve seat 1001. A connecting cavity 13 is provided between the connecting valve seat 1001 and the intake valve seat 1002. The double ball rod 11 passes through the connecting cavity 13 and slides in contact with the connecting cavity 13. The connecting valve seat 1001 and the intake valve seat 1002 cooperate with each other to achieve the effect of air delivery. Under normal circumstances, the intake port 1003 is connected to the first intake port 1003, which is the energized state. When the power is off, the first exhaust port 1004 and the second exhaust port 1005 of the connecting valve seat 1001 are connected to achieve the pressure relief operation.

[0031] The double-ball rod 11 includes a connecting rod 1101, which is connected to the top rod 7. A ceramic ball 1102 and a connecting ball 1103 are provided on the connecting rod 1101. The upper and lower ends of the connecting cavity 13 are respectively provided with a blocking groove 1301 and a connecting groove 1302. The ceramic ball 1102 slides in contact with the blocking groove 1301, and the connecting ball 1103 slides in contact with the connecting groove 1302. The locking assembly 12 is sleeved on the connecting rod 1101 and connected to the connecting rod 1101. During the process of controlling the gas supply and depressurization, the control is achieved through the ceramic ball 1102 and the connecting ball 1103. The connecting rod 1101 is driven by the top rod 7. The direction of fluid output is achieved by whether or not it contacts the blocking groove 1301 and the connecting groove 1302. This design ensures the precise control of the airflow path of the solenoid valve in the energized and de-energized states, and realizes the effective regulation of the output pressure.

[0032] A return spring 1006 is provided inside the intake valve seat 1002, and a return slot 1104 is provided on the connecting rod 1101. The two ends of the return spring 1006 abut against the return slot 1104 and the intake valve seat 1002, respectively. A locking groove 1007 is provided inside the connecting valve seat 1001, and a locking assembly 12 is provided inside the locking groove 1007. The locking assembly 12 includes multiple sealed rubber blocks 1201 and sealing springs 1202. The two ends of the sealing springs 1202 are respectively connected to the corresponding sealed rubber blocks 1201 and locking grooves 1007. A sealing wheel 1203 is provided on the locking groove 1007, and the sealing wheel 1203 is connected to the connecting rod 1101. When the connecting rod 1101 completes the gas transmission through toothed engagement, the return spring 1006 also abuts against the return slot 1104, which allows the connecting rod 1101 to return in time, reducing stress damage to the connecting rod 1101 and the top rod 7, and extending the service life of the equipment. The locking assembly 12 can fully clamp the connecting rod 1101, which can prevent the transmission fluid from being contaminated at the moment of pressure release, thus ensuring the safety of the transmission fluid. It also reduces the problem of dust and other obstructions caused by backflow, which could lead to incomplete closure between the connecting ball 1103 and the connecting slot 1302.

[0033] A sliding wedge ring 1105 is provided on the connecting rod 1101, and the sliding wedge ring 1105 slides in contact with the sealing rubber block 1201. The sealing wheel 1203 is provided with a release groove 1204 and a blocking groove 1205. The sealing rubber blocks 1201 are arranged in an array along the axis of the connecting rod 1101. When the sealing rubber block 1201 is in contact with the connecting rod 1101, the release groove 1204 is parallel to the sealing rubber block 1201. When the sealing rubber block 1201 is not in contact with the connecting rod 1101, the blocking groove 1205 abuts against the sealing rubber block 1201. When locking, the connecting ball 1103 and the connecting groove 1302 need to be in a closed state. Driven by the connecting rod 1101 When the sealing wheel 1203 rotates, the release groove 1204 will be parallel to the sealing rubber block 1201, and the sealing rubber block 1201 will be released. Under the action of the sealing spring 1202, the sealing rubber block 1201 will pop out instantly and press against the connecting rod 1101. All the sealing rubber blocks 1201 will form a complete circle, thus completing the locking. When locking is not needed, the sealing rubber block 1201 will be sent back into the locking groove 1007 under the action of the sliding wedge ring 1105 and blocked by the blocking slot 1205, so as not to obstruct the connection between the air inlet 1003 and the first exhaust port 1004. At the same time, the sealing rubber block 1201 also plays a buffering role.

[0034] A sensing component 14 is provided on the connecting valve seat 1001. The sensing component 14 includes a sensing groove 1401. A sensing groove 1401 is provided on the first exhaust port 1004 and the second exhaust port 1005 respectively. A sensing plate 1403 is provided in the sensing groove 1401. The sensing plate 1403 is rotatably connected to the sensing groove 1401 by a spring shaft. A transmission gear 1404 is provided on the sensing plate 1403. An angle sensor 1405 is provided in the sensing groove 1401. The angle sensor 1405 is connected to a multi-frequency... Connector 9 is electrically connected. When the first exhaust port 1004 and the second exhaust port 1005 are working, the sensing plate 1403 will sense the fluid flow rate and transmit it to the sensing plate 1403. The sensing plate 1403 will drive the transmission gear 1404 to rotate. The transmission gear 1404 will transmit the swing angle to the angle sensor 1405. The angle sensor 1405 can transmit the fluid impact force at this time, indirectly obtain the fluid flow rate, and transmit the deflection information to the multi-frequency connector 9.

[0035] When the deflection angle α of the angle sensor is greater than or equal to 60°, it indicates that the current flows smoothly in the first coil 602 and the fluid resistance is not significant. At this time, the first coil 602 and the second coil 603 can work separately, and only one coil is needed to complete the opening and closing operation. When the deflection angle α of the angle sensor is less than 60°, since the first coil 602 is the default main coil, it is known that the first coil 602 has a problem or the fluid is not flowing smoothly. In order to avoid accidents, the first coil 602 and the second coil 603 work together to enhance the magnetic force of the iron core 5, force the closure, and notify the subsequent operators to carry out maintenance.

[0036] Working principle: The wideband connector needs to be connected to the multi-frequency connector 9. The wideband connector then transmits an electrical signal to the multi-frequency connector 9, which converts the signal. The coil assembly 6 then operates, causing the iron core 5 to generate magnetic force, thus moving the push rod 7. The first coil 602 and the second coil 603 are responsible for generating the magnetic force, and the frequency of their generation is related to the magnetic force. During normal operation, the first coil 602 is mainly used. When the first coil 602 malfunctions, the second coil 603 takes over, indirectly driving the double ball rod 11. The valve seat assembly 10 moves within the valve seat assembly 10, controlling the connection state between the valve seat assemblies 10. The telescopic spring 8 can automatically reset the push rod 7. When the power is off, the telescopic spring 8 acts on the push rod 7, restricting the connection of the valve seat assemblies 10. The locking assembly 12 can fully clamp the connecting rod 1101, which can prevent the transmission fluid from being contaminated at the moment of pressure release. When the solenoid valve is energized, the iron core 5 drives the push rod 7 downward under the action of the magnetic field force, and the valve seat assembly 10 will be connected. The reset spring 1006 will abut against the reset slot 1104, allowing the connecting rod to... 1101 timely reset, the sealing rubber block 1201, under the action of the sliding wedge ring 1105, is sent back into the locking groove 1007 and blocked by the blocking groove 1205, thus no longer obstructing the communication between the air inlet 1003 and the first exhaust port 1004. Control is achieved through the ceramic ball 1102 and the connecting ball 1103, while the connecting rod 1101 is driven by the push rod 7. The direction of fluid output is determined by whether or not it contacts the obstructing groove 1301 and the connecting groove 1302. The multi-frequency connector 9 typically uses a fixed frequency (10Hz) duty cycle signal for signal transmission. The control and duty cycle adjustment correspond to different output pressures. Through the design of the closed cover plate 2, it is ensured that the iron core 5 will not rotate significantly during the reciprocating motion of the inner wall tube assembly 3, thereby improving product life and stability. When the exhaust port is working, the sensing plate 1403 will sense the fluid flow rate and transmit it to the sensing plate 1403. The sensing plate 1403 will drive the transmission gear 1404 to rotate. The transmission gear 1404 will transmit the swing angle to the angle sensor 1405 to adjust the usage status of the first coil 602 and the second coil 603.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A dual-redundant solenoid valve based on high-frequency pulse width modulation, characterized in that: The dual-redundant solenoid valve includes a housing (1), on which a sealing cover (2) is provided. The sealing cover (2) is connected to the housing (1) by screws. An inner wall tube assembly (3) and a control chamber (4) are provided inside the housing (1). An iron core (5) is provided inside the inner wall tube assembly (3). A coil assembly (6) is provided inside the control chamber (4). A push rod (7) is provided at the end of the iron core (5) away from the sealing cover (2). A telescopic spring (8) is provided on the shell (1), and the two ends of the telescopic spring (8) are connected to the top rod (7) and the inner wall tube assembly (3) respectively. A multi-frequency connector (9) is provided on the shell (1), and the multi-frequency connector (9) is electrically connected to the coil assembly (6) through a wire. A valve seat assembly (10) is provided at the bottom of the shell (1). A double ball rod (11) is provided at the end of the top rod (7) away from the closed cover plate (2), and the double ball rod (11) slides in contact with the valve seat assembly (10). The valve seat assembly (10) includes a connecting valve seat (1001), and a locking assembly (12) is provided inside the connecting valve seat (1001). The double ball rod (11) includes a connecting rod (1101). The locking assembly (12) is sleeved on the connecting rod (1101) and connected to the connecting rod (1101). A locking groove (1007) is provided inside the connecting valve seat (1001). The locking assembly (12) is provided inside the locking groove (1007). The locking assembly (12) includes multiple closed rubber blocks (1201) and closed spring pieces (1202). The two ends of the closed spring pieces (1202) are respectively connected to the corresponding closed rubber blocks (1201) and locking grooves (1007). A locking wheel is provided on the locking groove (1007). 1203), the closed wheel (1203) and the connecting rod (1101) are engaged by teeth, the connecting rod (1101) is provided with a sliding wedge ring (1105), the sliding wedge ring (1105) is in sliding contact with the closed rubber block (1201), the closed wheel (1203) is provided with a release groove (1204) and a blocking groove (1205), the closed rubber blocks (1201) are arranged in an array along the axis of the connecting rod (1101), when the closed rubber block (1201) is in contact with the connecting rod (1101), the release groove (1204) is parallel to the closed rubber block (1201), when the closed rubber block (1201) is not in contact with the connecting rod (1101), the blocking groove (1205) abuts against the closed rubber block (1201).

2. The dual-redundant solenoid valve based on high-frequency pulse width modulation according to claim 1, characterized in that: The inner wall tube assembly (3) includes a support tube (301), and a magnetic shielding ring (302) is provided at the lower end of the support tube (301). The upper end of the magnetic shielding ring (302) is connected to the support tube (301), and the lower end of the magnetic shielding ring (302) is connected to an armature seat (303). The height ratio of the inner wall tube assembly (3) height H: the height A of the armature seat (303): the height B of the step surface of the armature seat (303): the height C of the magnetic shielding ring (302): the height D of the inner wall tube is (20:12:11:4:4) to (20:13:12:5:5). The vertical air gap between the iron core (5) and the inner wall tube assembly (3) is 0.5 to 1 mm.

3. A dual-redundant solenoid valve based on high-frequency pulse width modulation according to claim 2, characterized in that: The coil assembly (6) is fitted onto the inner wall tube assembly (3). The coil assembly (6) includes a coil frame (601), which is fitted onto the support tube (301). The coil assembly (6) also includes a first coil (602) and a second coil (603). The first coil (602) and the second coil (603) are respectively fitted onto the coil frame (601). The first coil (602) and the second coil (603) are respectively electrically connected to the multi-frequency connector (9). A sealing cover (604) is provided on the coil frame (601). The sealing cover (604) is fitted onto the first coil (602) and the second coil (603).

4. A dual-redundant solenoid valve based on high-frequency pulse width modulation according to claim 3, characterized in that: The valve seat assembly (10) includes a connecting valve seat (1001), which is connected to the housing (1). An intake valve seat (1002) is provided on the connecting valve seat (1001), and an intake port (1003) is provided on the intake valve seat (1002). A first exhaust port (1004) and a second exhaust port (1005) are provided on the connecting valve seat (1001) and the intake valve seat (1002). A connecting cavity (13) is provided on the connecting valve seat (1001) and the intake valve seat (1002). The double ball rod (11) passes through the connecting cavity (13) and slides in contact with the connecting cavity (13).

5. A dual-redundant solenoid valve based on high-frequency pulse width modulation according to claim 4, characterized in that: The double ball stick (11) includes a connecting rod (1101), which is connected to the top rod (7). A ceramic ball (1102) and a connecting ball (1103) are provided on the connecting rod (1101). An obstruction groove (1301) and a connecting groove (1302) are respectively provided at the upper and lower ends of the connecting cavity (13). The ceramic ball (1102) slides in contact with the obstruction groove (1301), and the connecting ball (1103) slides in contact with the connecting groove (1302).

6. A dual-redundant solenoid valve based on high-frequency pulse width modulation according to claim 5, characterized in that: A reset spring (1006) is provided inside the intake valve seat (1002), and a reset slot (1104) is provided on the connecting rod (1101). The two ends of the reset spring (1006) abut against the reset slot (1104) and the intake valve seat (1002) respectively.

7. A dual-redundant solenoid valve based on high-frequency pulse width modulation according to claim 6, characterized in that: A sensing component (14) is provided on the connecting valve seat (1001). The sensing component (14) includes a sensing groove (1401). The first exhaust port (1004) and the second exhaust port (1005) are respectively provided with sensing grooves (1401). A sensing plate (1403) is provided in the sensing groove (1401). The sensing plate (1403) and the sensing groove (1401) are rotatably connected by a spring shaft. A transmission gear (1404) is provided on the sensing plate (1403). An angle sensor (1405) is provided in the sensing groove (1401). The angle sensor (1405) is electrically connected to the multi-frequency connector (9) through a wire.

8. A dual-redundant solenoid valve based on high-frequency pulse width modulation according to claim 7, characterized in that: When the deflection angle α of the angle sensor (1405) is greater than or equal to 60°, the first coil (602) and the second coil (603) work separately. When the deflection angle α of the angle sensor (1405) is less than 60°, the first coil (602) and the second coil (603) work together.

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