Dual-redundancy electromagnetic valve based on high-frequency pulse width modulation

Abstract

The invention discloses a dual-redundancy electromagnetic valve based on high-frequency pulse width modulation, and relates to the technical field of electromagnetic valves, the dual-redundancy electromagnetic valve comprises a shell, a sealing cover plate is arranged on the shell, the sealing cover plate is connected with the shell through screws, an inner wall pipe assembly and a control cavity are arranged in the shell, and the inner wall pipe assembly is connected with the control cavity through screws. An iron core is arranged in the inner wall pipe assembly, a coil assembly is arranged in the control cavity, an ejector rod is arranged at the end, away from the closed cover plate, of the iron core, a telescopic spring is arranged on the ejector rod, the two ends of the telescopic spring are connected with the ejector rod and the inner wall pipe assembly respectively, and a multi-frequency connector is arranged on the shell and electrically connected with the coil assembly through a wire. The valve seat assembly is arranged at the bottom end of the shell, the double-ball rod is arranged at the end, away from the sealing cover plate, of the ejector rod, and the double-ball rod makes sliding contact with the valve seat assembly, so that the fluid transmission safety is high, the service life of parts is long, and the fluid anti-pollution performance is good.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic valves, in particular to a dual-redundancy electromagnetic valve based on high-frequency pulse width modulation. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are valve components used to control fluids. Different solenoid valves function in different locations of the control system, and there are many types of solenoid valves. When selecting solenoid valves, you must follow the principles of safety and applicability. The most important thing is to choose the type to use based on specific working conditions. Therefore, they are often used in fluid control applications that control water, air, oil or gas.

[0003] Due to its automated features, solenoid valves are very useful to engineers. By using solenoid valves, engineers no longer need to operate the valves themselves, because they can use them in places where automatic control and monitoring of gas is required. However, because of this, the internal coil assembly is usually a consumable part, and it is easy for the coil to be damaged and unable to generate magnets. Therefore, engineers usually add another coil as insurance in case of emergency. However, the use of insurance coils is not perfect. It is very likely that the magnetic force generation will be unstable, or the closure will be too slow, resulting in fluid contamination. These problems need to be effectively solved. Summary of the invention

[0004] The object of the present invention is to provide a dual-redundancy solenoid valve based on high-frequency pulse width modulation to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions: The present invention provides a technical solution, the dual-redundancy solenoid valve comprises a through shell, a closed cover plate is arranged on the through shell, the closed cover plate is connected to the through shell by screws, an inner wall tube assembly and a control chamber are arranged in the through shell, an iron core is arranged in the inner wall tube assembly, a coil assembly is arranged in the control chamber, a push rod is arranged at one end of the iron core away from the closed cover plate, a telescopic spring is arranged on the push rod, two ends of the telescopic spring are respectively connected with the push rod and the inner wall tube assembly, a multi-frequency connector is arranged on the through shell, the multi-frequency connector is electrically connected to the coil assembly through a wire, a valve seat assembly is arranged at the bottom of the through shell, a double ball rod is arranged at one end of the push rod away from the closed cover plate, the double ball rod is in sliding contact with the valve seat assembly, when the solenoid valve is working, firstly, the broadband connector needs to be connected to the multi-frequency connector, and then the broadband connector The connector transmits electrical signals to the multi-frequency connector, the multi-frequency connector will convert the signal, and the coil assembly will work, so that the iron core will generate magnetic force, drive the push rod to move, and indirectly drive the double ball rod to move in the valve seat assembly, and control the connectivity between the valve seat assemblies. The telescopic spring can realize that the push rod can be automatically reset. When the power is off, the telescopic spring acts on the push rod to limit the connectivity of the valve seat assembly. When the solenoid valve is energized, the iron core drives the push rod to move downward under the action of the magnetic field force, and the valve seat assembly will be connected. The multi-frequency connector is usually controlled by a fixed frequency (10Hz) duty cycle signal. The adjustment of the duty cycle corresponds to different output pressures. The design of the closed cover plate ensures that the iron core will not rotate significantly during the reciprocating motion of the inner wall tube assembly, thereby improving the product life and stability.

[0006] The inner wall tube assembly includes a support tube, a magnetic isolation ring is arranged at the lower end of the support tube, the upper end of the magnetic isolation ring is connected to the support tube, the lower end of the magnetic isolation ring is connected to the armature seat, the height ratio of the inner wall tube assembly H: the height of the armature seat A: the height of the step surface of the armature seat B: the height of the magnetic isolation ring C: the height of the inner wall tube D is 20:12:11:4:4~20:13:12:5:5, and the vertical air gap between the iron core and the inner wall tube assembly is 0.5~1mm. This relative position will determine that the coil assembly generates the same magnetic force, and the same electromagnetic force is generated on the iron core through two groups of coils in different positions to achieve the same action effect, so as to ensure the normal working state of the product, and it is also more in line with the magnetic effect generated by multiple frequency bands.

[0007] The coil assembly is sleeved on the inner wall tube assembly, the coil assembly includes a coil frame, the coil frame is sleeved on the support tube, the coil assembly also includes a first coil and a second coil, the first coil and the second coil are respectively sleeved on the coil frame, the first coil and the second coil are respectively electrically connected to the multi-frequency connector, a sealing cover is provided on the coil frame, the sealing cover is sleeved on 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 respectively responsible for the production of magnetic force, the frequency generated is related to the magnetic force, during normal operation, the first coil is mainly used, when the first coil fails, switch to the second coil to continue working, when the magnetic force generated by the first coil is insufficient, the first coil and the second coil can be started at the same time to ensure the best working state, and the sealing cover is responsible for the safety of the first coil and the second coil.

[0008] The valve seat assembly includes a connecting valve seat, which is connected to the shell, an intake valve seat is arranged on the connecting valve seat, an intake port is arranged on the intake valve seat, a first exhaust port and a second exhaust port are arranged on the connecting valve seat, a locking assembly is arranged in the connecting valve seat, a connecting cavity is arranged on the connecting valve seat and the intake valve seat, the double ball rod passes through the connecting cavity and is in sliding contact with the connecting cavity, the connecting valve seat and the intake valve seat cooperate with each other, so as to achieve the effect of gas transmission. Normally, when the power is on, the intake port is connected with the first intake port, and when the power is off, the first exhaust port and the second exhaust port of the connecting valve seat are connected to realize the pressure relief operation.

[0009] The double-ball rod includes a connecting rod, which is connected to a push rod. A ceramic ball and a communicating ball are arranged on the connecting rod. An obstruction groove and a communicating groove are arranged at the upper and lower ends of the communicating cavity respectively. The ceramic ball is in sliding contact with the obstruction groove, and the communicating ball is in sliding contact with the communicating groove. The locking assembly is sleeved on the connecting rod and connected to the connecting rod. In the process of controlling gas transmission and pressure release, the control is performed through the ceramic ball and the communicating ball, and the connecting rod is driven by the push rod. The output direction of the fluid is realized by whether it is in contact with the obstruction groove and the communicating groove. This design ensures the precise control of the airflow path by the solenoid valve in the power-on and power-off states, and realizes the effective regulation of the output pressure.

[0010] A return spring is arranged in the intake valve seat, and a return slot is arranged on the connecting rod. Two ends of the return spring respectively resist the return slot and the intake valve seat. A locking slot is arranged in the connecting valve seat, and a locking assembly is arranged in the locking slot. The locking assembly comprises multiple closed rubber blocks and closed spring pieces. Two ends of the closed spring pieces are respectively connected to the corresponding closed rubber blocks and the locking slot. A closing wheel is arranged on the locking slot, and the closing wheel is meshed with the connecting rod through teeth. When the gas transmission is completed, the return spring will also resist the return slot, so that the connecting rod can be reset in time, reducing the stress damage of the connecting rod and the top rod, and extending the service life of the equipment. The locking assembly can fully clamp the connecting rod, which can avoid the problem of transmission fluid being contaminated at the moment of pressure release, and can fully ensure the safety of the transmission fluid. At the same time, it also reduces the problem of dust and other obstacles in the product due to reflux problems, which makes the connecting ball and the connecting slot incompletely closed.

[0011] A sliding wedge ring is provided on the connecting rod, and the sliding wedge ring is in sliding contact with the closed rubber block. A releasing groove and a blocking groove are provided on the closing wheel. The closed rubber block is distributed in an array along the axis of the connecting rod. When the closed rubber block is in contact with the connecting rod, the releasing groove is parallel to the closed rubber block. When the closed rubber block is not in contact with the connecting rod, the blocking groove resists the closed rubber block. When locking, the connecting ball and the connecting groove need to be in a closed state. Driven by the connecting rod, the closing wheel rotates. At this time, the releasing groove will be parallel to the closed rubber block. At this time, the closed rubber block will be released. Under the action of the closing spring piece, the closed rubber block will pop out instantly and be squeezed on the connecting rod, and all the closed rubber blocks will form a complete circle, thereby completing the locking. When locking is not required, the closed rubber block is sent back into the locking groove under the action of the sliding wedge ring and is blocked by the blocking groove, thereby no longer hindering the connection between the air inlet and the first exhaust port. At the same time, the closed rubber block also plays a buffering role.

[0012] A sensing component is provided on the connecting valve seat, and the sensing component includes a sensing groove. The first exhaust port and the second exhaust port are respectively provided with sensing grooves. A sensing sheet is provided in the sensing groove. The sensing sheet and the sensing groove are rotationally connected through a spring shaft. A transmission gear is provided on the sensing sheet. 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 sheet will sense the flow rate of the fluid and transmit it to the sensing sheet. The sensing sheet will drive the transmission gear to rotate, and 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 flow rate of the fluid, and transmit the deflection information to the multi-frequency connector.

[0013] When the deflection angle α of the angle sensor is ≥60°, it proves that the current flows smoothly in the first coil at this time, and the resistance of the fluid is not large. At this time, the first coil and the second coil 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 <60°, since the first coil is used as the main coil by default, it is known that there is a problem with the first coil at this time, or the fluid is not smooth at this time. In order to avoid accidents, the first coil and the second coil work together to enhance the magnetic force of the iron core, force closure, and notify subsequent operators to carry out maintenance.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts a coil structure component with double insurance, which can achieve multiple protections. While working stably, it can also realize emergency handling in case of accidents. When a single coil is damaged, it can be remedied in time. At the same time, the effect of multi-frequency input is adopted, which can realize that the protection coil can fully achieve the effect of the main coil; the locking component can also fully ensure that the fluid will not be contaminated when transmitting the fluid. When releasing the pressure or supplying, the locking component will respond quickly to cut off possible contamination problems. At the same time, it also has a certain buffering effect to avoid the problem of shortening the service life of the equipment due to a sudden increase in internal fluid pressure; the present invention also adopts an early warning induction component, which can automatically adjust the working state of the coil according to the current fluid flow state, so as to adapt to fluid transmission applications under various states. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional top view structural schematic diagram of the present invention; Figure 2 A schematic diagram of a three-dimensional upward-looking structure of the present invention; Figure 3 A schematic diagram of a top view structure of the present invention; Figure 4 This is a schematic diagram of an overall cross-sectional structure of the present invention; Figure 5 for Figure 4 A schematic diagram of a partially enlarged structure of A; Figure 6 for Figure 4 A schematic diagram of a partially enlarged structure B; Figure 7 It is a schematic diagram of the height ratio structure of the inner wall tube assembly of the present invention; Figure 8 It is a schematic diagram of the structure of the locking assembly of the present invention; In the figure: 1, through the shell; 2, closed cover plate; 3, inner wall tube assembly; 301, support tube; 302, magnetic isolation 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, ejector rod; 8, telescopic spring; 9, multi-frequency connector; 10, valve seat assembly; 1001, connecting valve seat; 1002, intake valve seat; 1003, intake port; 1004, first exhaust port; 1005, second exhaust port; 1006, reset spring; 1007, locking slot; 11, double ball rod; 1101, connecting rod; 1102, ceramic ball; 1103, connecting ball; 1104, reset slot; 1105, sliding wedge ring; 12, locking assembly; 1201, closed rubber block; 1202, closed spring; 1203, closed wheel; 1204, release slot; 1205, blocking slot; 13, connecting cavity; 1301, blocking slot; 1302, connecting slot; 14, sensing assembly; 1401, sensing slot; 1403, sensing sheet; 1404, transmission gear; 1405, angle sensor. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Example: Figure 1-Figure 8As shown, the present invention provides a technical solution, the dual-redundancy solenoid valve includes a shell 1, a closed cover plate 2 is arranged on the shell 1, the closed cover plate 2 is connected to the shell 1 by screws, an inner wall tube assembly 3 and a control chamber 4 are arranged in the shell 1, an iron core 5 is arranged in the inner wall tube assembly 3, a coil assembly 6 is arranged in the control chamber 4, a push rod 7 is arranged at one end of the iron core 5 away from the closed cover plate 2, a telescopic spring 8 is arranged on the push rod 7, and 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 arranged on the shell 1, the multi-frequency connector 9 is electrically connected to the coil assembly 6 through a wire, a valve seat assembly 10 is arranged at the bottom end of the shell 1, a double ball rod 11 is arranged at one end of the push rod 7 away from the closed cover plate 2, and the double ball rod 11 is in sliding contact with the valve seat assembly 10. When the solenoid valve is working, it is first necessary to connect the broadband connector with the multi-frequency connector 9. Then, the broadband connector transmits the electrical signal to the multi-frequency connector 9, the multi-frequency connector 9 will convert the signal, and the coil assembly 6 will work, so that the iron core 5 generates magnetic force, drives the push rod 7 to move, and indirectly drives the double ball rod 11 to move in the valve seat assembly 10, controls the connection state between the valve seat assemblies 10, and the telescopic spring 8 can realize that the push rod 7 can be automatically reset. When the power is off, the telescopic spring 8 acts on the push rod 7 to limit 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 duty cycle signal of a fixed frequency (10Hz). The adjustment of the duty cycle corresponds to different output pressures. The design of the closed cover plate 2 ensures that the iron core 5 will not rotate significantly during the reciprocating motion of the inner wall tube assembly 3, thereby improving the product life and stability.

[0018] The inner wall tube assembly 3 includes a support tube 301, a magnetic isolation ring 302 is arranged at the lower end of the support tube 301, the upper end of the magnetic isolation ring 302 is connected to the support tube 301, and the lower end of the magnetic isolation ring 302 is connected to the armature seat 303, and the height ratios of the height H of the inner wall tube assembly 3: 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 isolation ring 302: the height D of the inner wall tube are 20:12:11:4:4~20:13:12:5:5, and the vertical air gap between the iron core 5 and the inner wall tube assembly 3 is 0.5~1mm. This relative position will determine that the coil assembly 6 generates the same magnetic force, and the same electromagnetic force is generated on the iron core 5 through two groups of coils in different positions to achieve the same action effect, thereby ensuring the normal working state of the product, and it is also more in line with the magnetic effect generated by multiple frequency bands.

[0019] The coil assembly 6 is sleeved on the inner wall tube assembly 3, and the coil assembly 6 includes a coil frame 601, and the coil frame 601 is sleeved on 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 sleeved on 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, and the sealing cover 604 is sleeved on 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 the second coil 603, the first coil 602 and the second coil 603 are respectively responsible for the production of magnetic force, and the frequency generated is related to the magnetic force. During normal operation, the first coil 602 is mainly used. When the first coil 602 fails, it switches to the second coil 603 to continue working. When the magnetic force generated by the first coil 602 is insufficient, the first coil 602 and the second coil 603 can be started at the same time to ensure the best working state. The sealing cover 604 is responsible for the safety of the first coil 602 and the second coil 603.

[0020] The valve seat assembly 10 includes a connecting valve seat 1001, which is connected to the shell 1, an intake valve seat 1002 is arranged on the connecting valve seat 1001, an intake port 1003 is arranged on the intake valve seat 1002, a first exhaust port 1004 and a second exhaust port 1005 are arranged on the connecting valve seat 1001, a locking assembly 12 is arranged in the connecting valve seat 1001, a connecting cavity 13 is arranged on the connecting valve seat 1001 and the intake valve seat 1002, a double ball rod 11 passes through the connecting cavity 13 and is in sliding contact with the connecting cavity 13, the connecting valve seat 1001 and the intake valve seat 1002 cooperate with each other, so as to achieve the effect of gas transmission. Normally, when power is on, the intake port 1003 is connected with the first intake port 1003, and when power is off, the first exhaust port 1004 and the second exhaust port 1005 of the connecting valve seat 1001 are connected to achieve pressure relief operation.

[0021] The double ball rod 11 includes a connecting rod 1101, which is connected to the push rod 7. A ceramic ball 1102 and a connecting ball 1103 are arranged on the connecting rod 1101. An obstruction groove 1301 and a connecting groove 1302 are arranged at the upper and lower ends of the connecting cavity respectively. The ceramic ball 1102 is in sliding contact with the obstruction groove 1301, and the connecting ball 1103 is in sliding contact with the connecting groove 1302. The locking assembly 12 is sleeved on the connecting rod 1101 and connected to the connecting rod 1101. In the process of controlling gas supply and pressure release, the control is performed by the ceramic ball 1102 and the connecting ball 1103, and the connecting rod 1101 is driven by the push rod 7. The output direction of the fluid is realized by whether it is in contact with the obstruction groove 1301 and the connecting groove 1302. This design ensures that the solenoid valve accurately controls the airflow path in the power-on and power-off states, and realizes effective regulation of the output pressure.

[0022] A return spring 1006 is arranged in the intake valve seat 1002, a return slot 1104 is arranged on the connecting rod 1101, two ends of the return spring 1006 respectively abut against the return slot 1104 and the intake valve seat 1002, a locking slot 1007 is arranged in the connecting valve seat 1001, a locking assembly 12 is arranged in the locking slot 1007, the locking assembly 12 comprises a plurality of sealing rubber blocks 1201 and sealing springs 1202, two ends of the sealing springs 1202 are respectively connected to the corresponding sealing rubber blocks 1201 and the locking slot 1007, a sealing wheel 1203 is arranged on the locking slot 1007, and the sealing wheel 1203 is connected to the connecting rod 1101. The connecting rod 1101 is meshed with teeth, and when the gas transmission is completed, the reset spring 1006 will also press against the reset slot 1104, so that the connecting rod 1101 can be reset in time, reducing the 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 avoid the problem of transmission fluid being contaminated at the moment of pressure release, and can fully ensure the safety of the transmission fluid. At the same time, it also reduces the problem of dust and other obstructions in the product due to reflux problems, resulting in incomplete closure of the connecting ball 1103 and the connecting slot 1302.

[0023] The connecting rod 1101 is provided with a sliding wedge ring 1105, which 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 block 1201 is 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 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 is against the closed rubber block 1201. When locking, the connecting ball 1103 and the connecting groove 1302 need to be in a closed state. Under the action of the closing spring piece 1202, the closing rubber block 1201 will instantly pop out and be squeezed on the connecting rod 1101, and all the closing rubber blocks 1201 will form a complete circle, thereby completing the locking. When the locking is not needed, the closing rubber block 1201 is sent back into the locking groove 1007 under the action of the sliding wedge ring 1105, and is blocked by the blocking groove 1205, thereby no longer hindering the connection between the air inlet 1003 and the first exhaust port 1004, and the closing rubber block 1201 also plays a buffering role.

[0024] The connecting valve seat 1001 is provided with a sensing component 14, which includes a sensing slot 1401. The first exhaust port 1004 and the second exhaust port 1005 are provided with sensing slots 1401 respectively. A sensing sheet 1403 is provided in the sensing slot 1401. The sensing sheet 1403 is rotatably connected to the sensing slot 1401 through a spring shaft. A transmission gear 1404 is provided on the sensing sheet 1403. An angle sensor 1405 is provided in the sensing slot 1401. The angle sensor 1405 is connected to the multi-frequency The connector 9 is electrically connected. When the first exhaust port 1004 and the second exhaust port 1005 are working, the sensor sheet 1403 will sense the flow rate of the fluid and transmit it to the sensor sheet 1403. The sensor sheet 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 flow rate of the fluid, and transmit the deflection information to the multi-frequency connector 9.

[0025] When the deflection angle α of the angle sensor is ≥60°, it proves that the current of the first coil 602 at this time flows smoothly and the resistance of the fluid is not large. At this time, the first coil 602 and the second coil 603 work separately, and only any one coil is needed to complete the opening and closing operation. When the deflection angle α of the angle sensor is <60°, since the first coil 602 is used as the main coil by default, it is known that the first coil 602 at this time has a problem, or the fluid at this time is not smooth, and 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 closure, and notify subsequent operators to carry out maintenance.

[0026] Working principle: It is necessary to connect the broadband connector to the multi-frequency connector 9, 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, so that the iron core 5 generates magnetic force, driving the top rod 7 to move. The first coil 602 and the second coil 603 are responsible for the production of magnetic force respectively, and the frequency generated is related to the magnetic force. In normal operation, the first coil 602 is mainly used. When the first coil 602 fails, it switches to the second coil 603 to continue working, indirectly driving the double ball rod 11 in the valve The telescopic spring 8 can realize that the push rod 7 can be automatically reset when the power is off, and the telescopic spring 8 acts on the push rod 7 to limit the connection of the valve seat assembly 10, and the locking assembly 12 can fully clamp the connecting rod 1101 to avoid the problem of transmission fluid 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, the valve seat assembly 10 will be connected, and the reset spring 1006 will resist the reset slot 1104, so that the connection The rod 1101 is reset in time, and the sealing rubber block 1201 is sent back into the locking groove 1007 under the action of the sliding wedge ring 1105, and is blocked by the blocking groove 1205, so that the connection between the air inlet 1003 and the first exhaust port 1004 is no longer hindered. The ceramic ball 1102 and the connecting ball 1103 are controlled, and the connecting rod 1101 is driven by the push rod 7 to realize the output direction of the fluid by contacting with the blocking groove 1301 and the connecting groove 1302. The multi-frequency connector 9 is usually controlled by a fixed frequency (10Hz) duty cycle signal. The duty cycle is adjusted to correspond to different output pressures. The design of the closed cover plate 2 ensures that the iron core 5 will not rotate significantly during the reciprocating motion of the inner wall tube assembly 3, thereby improving the product life and stability. When the exhaust port is working, the sensor sheet 1403 will sense the flow rate of the fluid and transmit it to the sensor sheet 1403. The sensor sheet 1403 will drive the transmission gear 1404 to rotate, and the transmission gear 1404 will transmit the swing angle to the angle sensor 1405 to adjust the use status of the first coil 602 and the second coil 603.

[0027] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A dual-redundancy solenoid valve based on high-frequency pulse width modulation, characterized in that: The dual-redundancy solenoid valve comprises a through shell (1), the through shell (1) is provided with a closed cover plate (2), the closed cover plate (2) is connected to the through shell (1) by screws, an inner wall tube assembly (3) and a control chamber (4) are provided in the through shell (1), an iron core (5) is provided in the inner wall tube assembly (3), a coil assembly (6) is provided in the control chamber (4), a push rod (7) is provided at one end of the iron core (5) away from the closed cover plate (2), and the push rod (7) is provided at one end of the iron core (5) away from the closed cover plate (2). ) is provided with a telescopic spring (8), the two ends of the telescopic spring (8) are respectively connected to the push rod (7) and the inner wall tube assembly (3), the through shell (1) is provided with a multi-frequency connector (9), the multi-frequency connector (9) is electrically connected to the coil assembly (6) through a wire, and a valve seat assembly (10) is provided at the bottom end of the through shell (1), and a double ball rod (11) is provided at the end of the push rod (7) away from the closing cover plate (2), and the double ball rod (11) is in sliding contact with the valve seat assembly (10).

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

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

4. The dual-redundancy solenoid valve based on high-frequency pulse width modulation according to claim 3 is characterized in that: The valve seat assembly (10) comprises a connecting valve seat (1001), the connecting valve seat (1001) being connected to a housing (1), the connecting valve seat (1001) being provided with an air intake valve seat (1002), the air intake valve seat (1002) being provided with an air intake port (1003), the connecting valve seat (1001) being provided with a first exhaust port (1004) and a second exhaust port (1005), a locking assembly (12) being provided inside the connecting valve seat (1001), a connecting cavity (13) being provided between the connecting valve seat (1001) and the air intake valve seat (1002), and the double ball rod (11) passing through the connecting cavity (13) and being in sliding contact with the connecting cavity (13).

5. A dual-redundancy solenoid valve based on high-frequency pulse width modulation according to claim 4, characterized in that: The double ball rod (11) comprises a connecting rod (1101), the connecting rod (1101) being connected to a top rod (7), the connecting rod (1101) being provided with a ceramic ball (1102) and a connecting ball (1103), the connecting cavity being provided with an obstruction groove (1301) and a connecting groove (1302) at the upper and lower ends respectively, the ceramic ball (1102) being in sliding contact with the obstruction groove (1301), the connecting ball (1103) being in sliding contact with the connecting groove (1302), and the locking assembly (12) being sleeved on the connecting rod (1101) and connected to the connecting rod (1101).

6. A dual-redundancy solenoid valve based on high-frequency pulse width modulation according to claim 5, characterized in that: A return spring (1006) is arranged in the intake valve seat (1002), a return slot (1104) is arranged on the connecting rod (1101), two ends of the return spring (1006) respectively abut against the return slot (1104) and the intake valve seat (1002), a locking slot (1007) is arranged in the connecting valve seat (1001), a locking assembly (12) is arranged in the locking slot (1007), the locking assembly (12) comprises a plurality of sealing rubber blocks (1201) and sealing spring sheets (1202), two ends of the sealing spring sheets (1202) are respectively connected to corresponding sealing rubber blocks (1201) and the locking slot (1007), a sealing wheel (1203) is arranged on the locking slot (1007), and the sealing wheel (1203) is meshed with the connecting rod (1101) through teeth.

7. A dual-redundancy solenoid valve based on high-frequency pulse width modulation according to claim 6, characterized in that: The connecting rod (1101) is provided with a sliding wedge ring (1105), the sliding wedge ring (1105) is in sliding contact with a closed rubber block (1201), the closed wheel (1203) is provided with a release groove (1204) and a blocking groove (1205), the closed rubber block (1201) is distributed 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 is parallel to the closed rubber block (1201), and 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).

8. The dual-redundancy solenoid valve based on high-frequency pulse width modulation according to claim 7, characterized in that: The connecting valve seat (1001) is provided with a sensing component (14), the sensing component (14) comprising a sensing slot (1401), the first exhaust port (1004) and the second exhaust port (1005) are provided with sensing slots (1401) respectively, a sensing sheet (1403) is provided in the sensing slot (1401), the sensing sheet (1403) and the sensing slot (1401) are rotationally connected via a spring shaft, a transmission gear (1404) is provided on the sensing sheet (1403), an angle sensor (1405) is provided in the sensing slot (1401), and the angle sensor (1405) is electrically connected to the multi-frequency connector (9) via a wire.

9. The dual-redundancy solenoid valve based on high-frequency pulse width modulation according to claim 8, characterized in that: When the deflection angle α of the angle sensor (1405) is ≥60°, the first coil (602) and the second coil (603) work separately; when the deflection angle α of the angle sensor (1405) is <60°, the first coil (602) and the second coil (603) work together.

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