High-speed switch type valve terminal and driving method thereof

Abstract

The invention discloses a high-speed switch type valve terminal and a driving method thereof. The valve terminal comprises a valve terminal body, a unit valve, an electromagnetic unit and a control unit. The unit valve is arranged in the valve terminal body, the electromagnetic unit is located above the unit valve, and the control unit achieves rapid on-off and flow regulation and control by controlling the electromagnetic unit. The driving method comprises the following steps: numbering the electromagnetic components in each group of unit valves, acquiring a current value and a rising edge and a falling edge of a switch piece, calculating the duty ratio of an input signal, and carrying out combined control. The operation of the electromagnetic unit comprises a strong excitation stage and a closing stage, and optionally comprises a holding stage, so that quick response and accurate regulation and control are realized.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a high-speed switching valve island and a driving method thereof. Background Art

[0002] In the field of industrial automation and fluid control, high-speed switching valve islands are widely used in various control systems as key components. However, traditional high-speed switching valve islands have limitations in response speed and flow control, and it is difficult to meet the production needs of high precision and high efficiency. Specifically, the electromagnetic unit control method of traditional valve islands is single, which makes it difficult to achieve fast on-off and precise flow control; at the same time, the structural design and material selection of the unit valve also limit the improvement of its performance. Therefore, a new type of high-speed switching valve island and its driving method are developed to improve the response speed and flow control accuracy of the valve island. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In order to solve the above problems, the present invention proposes a high-speed switching valve island and its driving method, aiming to solve the problem that the electromagnetic unit control method of the traditional valve island in the prior art is single and difficult to achieve fast on and off and precise flow control; at the same time, the structural design and material selection of the unit valve also limit the improvement of its performance.

[0005] (II) Technical solution

[0006] A high-speed switch type valve island of the present invention comprises:

[0007] The valve island body has a first valve channel;

[0008] At least two sets of unit valves are arranged in the valve island body, the unit valves include a second valve channel, the first valve channel is communicated with the second valve channel, and are used to form a path for fluid to pass;

[0009] An electromagnetic unit is arranged in the valve channel body, the electromagnetic unit is located above the unit valve, and is used to control the unit valve to cut off or conduct fluid;

[0010] A control unit, used to control the electromagnetic unit to achieve rapid switching and flow control, the control unit comprising a component carrier and a switch element arranged on the component carrier, a driving chip for driving the switch element to operate, a power supply element for powering the component, and a main control chip;

[0011] The electromagnetic unit is jointly controlled by at least two switch elements.

[0012] In the present invention, the electromagnetic unit is a coil assembly, and the electromagnetic unit includes a mounting seat and an electromagnetic unit, and the electromagnetic unit is arranged in the mounting seat. The control unit can control the magnetic field direction of the electromagnetic unit and thus control the on or off of the unit valve.

[0013] In the present invention, the unit valve includes a valve sleeve and a valve core, the valve sleeve is fixedly arranged in the valve island body, the valve core is movably arranged in the valve sleeve, and the valve core can move up and down under the control of the electromagnetic component.

[0014] In the present invention, the switch element may be a combination of one or more of a MOS tube and a thyristor;

[0015] The switch element is connected to two ends of the coil respectively.

[0016] In the present invention, the electromagnetic unit further comprises an armature, the valve core is connected to the armature via bolts, an elastic member is further provided between the armature and the mounting seat, and the armature is arranged between the mounting seat and the valve core.

[0017] Another high-speed switch type valve island driving method of the present invention is implemented based on the high-speed switch type valve island described in the above technical solution, and the high-speed switch type valve island driving method includes:

[0018] The electromagnetic components in each group of the unit valves are numbered, the current value passing through each electromagnetic unit is obtained, and the rising edge and falling edge of the switch element are obtained at the same time, the duty cycle of the input signal is calculated, and the valve island is controlled in combination;

[0019] The operation of the electromagnetic unit includes at least two stages, including a strong excitation stage and a closing stage. In the strong excitation stage, the on-off speed of the unit valve can be accelerated by controlling the switch elements located at both ends of the electromagnetic unit.

[0020] In the present invention, the stage also includes a holding stage;

[0021] When a plurality of the unit valves need to be opened, the basic frequency value of the switch element and the duty cycle of the input signal are obtained to determine whether the previous unit valve is in the holding stage, and then the next unit valve is opened.

[0022] In the present invention, in the holding stage, the fundamental frequency of one of the switch elements of the electromagnetic unit is 4.5-5.5 kHz, and the duty cycle of the input signal is 5-7%.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The high-speed on-off valve island and its driving method proposed in the present invention realize fast on-off and precise flow control of the unit valve by optimizing the design of the electromagnetic unit and the control unit. Specifically, the electromagnetic unit adopts a combined control method of the coil assembly and the switch element, which can speed up the on-off speed of the unit valve and improve the response speed of the valve island; at the same time, the control unit can accurately control the magnetic field direction of the electromagnetic unit to achieve precise flow control of the unit valve. In addition, the valve sleeve and valve core of the unit valve are reasonably designed and the material selection is appropriate, which further improves the performance of the valve island.

[0026] (2) The driving method of the present invention also includes combined control of the valve island, and adjusting the basic frequency of the switch element and the duty cycle of the input signal according to the operation stage of the electromagnetic unit, thereby realizing the coordinated control and efficient operation of multiple unit valves. In summary, the high-speed switch valve island and its driving method of the present invention have the advantages of fast response speed, high flow control accuracy, compact structure, easy maintenance, etc., and can be widely used in the fields of industrial automation and fluid control. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the cross-sectional structure of the valve island;

[0029] Figure 2 It is a schematic diagram of the explosion structure of the unit valve and the electromagnetic unit;

[0030] Figure 3 Schematic diagram of the connection structure of the unit valve;

[0031] Figure 4 is a schematic diagram of a coil assembly;

[0032] Figure 5 It is a schematic diagram of the cross-sectional structure of the electromagnetic unit;

[0033] Figure 6 A logic diagram of a driving method of a valve island;

[0034] Figure 7 is a schematic diagram of 16 damping force curves applied to a shock absorber according to the present invention;

[0035] Figure 8 It is a schematic diagram of the input signal duty ratio and valve combination opening and closing table of the present invention.

[0036] 1. valve island body, 11. cavity, 111. first cavity, 112. second cavity, 12. hole, 13. thread groove;

[0037] 2. unit valve, 21. valve core, 211. sharp edge, 212. annular groove, 213. pressure equalizing groove, 22. valve sleeve, 221. chamfer, 222. guide hole, 223. discharge port, 23. first valve channel, 24. second valve channel;

[0038] 3. electromagnetic unit, 31. coil assembly, 311. mounting seat, 312. electromagnetic coil, 313. cavity, 314. groove, 32. armature, 34. elastic member;

[0039] 4. control unit, 41. component carrier, 42. switch component, 43. driver chip, 44. power supply component, 45. main control chip;

[0040] 5. Adjustment parts;

[0041] 6. Cover;

[0042] 7. Wire pressing plate. DETAILED DESCRIPTION

[0043] Example 1

[0044] like Figure 1 As shown, the digital solenoid valve island of the present invention mainly includes key components such as a valve island body 1, a unit valve 2, an electromagnetic unit 3, a control unit 4 and an adjusting member 5.

[0045] The valve island body 1 is made of high-strength, corrosion-resistant material, and is designed with multiple cavities 11 inside. One end of each cavity is provided with an opening to facilitate the installation of the unit valve 2 and the electromagnetic unit 3. The cavity 11 also includes a first cavity 111 and a second cavity 112. Figure 1 The first cavity 111 is disposed at the upper part of the valve island body, with its opening facing upward, for accommodating the electromagnetic unit 3; the second cavity 112 is disposed at the lower part of the valve island body, with its opening facing downward, for accommodating the unit valve 2. In particular, the first cavity 111 and the second cavity 112 are interconnected, so that the electromagnetic unit 3 can better drive and control the action of the unit valve 2.

[0046] like Figure 1-Figure 2As shown, the valve island body 1 is also provided with a channel 12 for fluid to pass through, ensuring that the fluid can smoothly enter and exit the unit valve 2, and then flow out of the unit valve 2. The valve island body 1 serves as the supporting structure of the entire system, and is internally designed with a first valve channel 23 as the inlet and outlet of the fluid or gas medium. In the valve island body 1, at least two unit valves 2 are arranged, and each unit valve 2 is provided with a second valve channel 24, which is connected to the first valve channel 23, and together constitutes the main path for the fluid or gas to pass through, and its flow direction is as shown in FIG. Figure 1 As shown by the arrows. The design of the unit valve adopts a modular concept, which is convenient for flexible increase or decrease of the number according to actual needs, and improves the scalability and adaptability of the system. In particular, in this embodiment, the first valve channel 23 is used as an inlet, and the plurality of second valve channels 24 are used as outlets; according to actual needs, the plurality of second valve channels 24 can also be used as inlets, and the first valve channel 23 can be used as an outlet.

[0047] Specifically, Figure 2-Figure 3 As shown, the unit valve 2 is the core component for controlling the flow of fluid. A unit valve 2 is disposed in each second cavity 112. In this embodiment, there are four second cavities 112 and four unit valves 2. The outer wall of the unit valve 2 is provided with an external thread, and the inner wall of the second cavity 112 is provided with an internal thread that matches the external connection thread, that is, the unit valve 2 is mounted in the second cavity 112 through a threaded connection.

[0048] The unit valve 2 includes a valve core 21 and a valve sleeve 22 having a discharge port 223. The valve sleeve 22 is fixed in the cavity 11, and the valve core 21 is movably arranged in the valve sleeve 22, and can move up and down to control the flow of fluid, wherein the discharge port 223 is arranged at the bottom of the valve sleeve. The lower part of the valve core 21 is provided with a sharp edge 211, and the lower part of the valve sleeve 22 is provided with a chamfer 221 that cooperates with the sharp edge 211 to cut off the fluid. When the sharp edge 211 abuts against the chamfer 221, the unit valve is closed; otherwise, the unit valve is opened.

[0049] A flow guide hole 222 is provided on the side of the valve sleeve 22, and an annular groove 212 is provided on the valve core 21 on the same horizontal plane as the flow guide hole 222. A storage chamber is formed between the annular groove 212 and the valve sleeve 22 for temporarily storing the fluid passing through the solenoid valve body. This design helps to reduce fluid impact and improve the stability of fluid control. In addition, evenly distributed pressure equalizing grooves 213 are provided on the valve core 21 to prevent the valve core from getting stuck under high pressure. The pressure equalizing grooves 213 are arranged above the annular groove 212, which can effectively disperse the fluid pressure and extend the service life of the valve core.

[0050] The electromagnetic unit 3 is used to drive the valve core 21 of the unit valve 2 to move, and the number of the electromagnetic unit 3 corresponds to the number of the unit valves 2. The electromagnetic unit includes a coil assembly 31, an armature 32 and a coil assembly 31. The coil assembly 31 is connected to the control unit 4, and the magnitude of its magnetic force is changed by controlling the magnitude of the current flowing through the coil assembly 31, thereby driving the valve core 21 to move.

[0051] The coil assembly 31 includes a mounting seat 311 and at least one electromagnetic coil 312. The mounting seat 311 is provided with a cavity 313 for mounting the electromagnetic coil 312. One end of the cavity also has an opening. After the electromagnetic coil 312 is installed, it is insulated and sealed by epoxy resin, and the position of the electromagnetic coil 312 is fixed. In order to enhance the magnetic force of the electromagnetic coil 312, the electromagnetic unit 3 also includes an armature 32, which is arranged in the first cavity 111 and is located between the coil assembly 31 and the valve core 21, and the valve core 21 is fixedly connected by bolts.

[0052] In order to better compress the valve core, a groove 314 is provided on the coil assembly 31. An elastic member 34 is provided in the groove 314. One end of the elastic member 34 abuts against the armature 32, and the other end is arranged in the groove to compress the valve core and reset it.

[0053] Reference Figure 1 , Figure 4 As shown, the control unit 4 is arranged on the valve island body 1, and is used to control the action of the electromagnetic unit 3 and provide a power source. It can accurately control the power-on state of each coil assembly 31 according to an external signal or a preset program, thereby realizing accurate control of the conduction ratio of the unit valve 2.

[0054] The control unit 4 is the brain of the entire valve island. It integrates key components such as the component carrier 41, the switch 42, the drive chip 43, the power supply 44 and the main control chip 45. In this embodiment, the component carrier 41 is a circuit board. Among them, the switch 42 adopts semiconductor devices such as MOS tubes or thyristors. These switch components 42 are respectively connected to the two ends of the coil. By controlling its on-off state, the current in the coil is adjusted, thereby controlling the generation and disappearance of the magnetic field, and realizing the rapid on-off control of the unit valve 2. It is worth noting that in order to improve the reliability and response speed of the control, the coil assembly 31 of the present invention is jointly controlled by the switch components 42 respectively connected to the two ends of the electromagnetic coil 312, forming a redundant design to ensure stable operation under extreme conditions.

[0055] The main control chip 45 in the control unit 4 is responsible for receiving external instructions and calculating corresponding control signals according to a preset logic algorithm. These signals are amplified by the driver chip and directly act on the switch 42 to achieve precise control of the current of the electromagnetic coil 312. At the same time, the power supply 44 provides a stable working voltage for the entire control unit 4 and the electromagnetic unit 3 to ensure continuous and stable operation of the system.

[0056] Through the above design, the high-speed switch valve island of the present invention can realize the rapid switching and precise regulation of the fluid path, with fast response speed and high control accuracy, and is very suitable for industrial automation application scenarios that require frequent changes in fluid flow direction or flow rate. In addition, the modular design makes the system easy to maintain and upgrade, reducing the user's maintenance cost and time cost.

[0057] like Figure 5 As shown, the adjusting member 5 is used to fix and adjust the position of the electromagnetic unit 3. In this embodiment, the adjusting member 5 is a threaded fastener, i.e., a bolt, a screw, a stud, etc., and the valve island body 1 is provided with a threaded groove 13 connected to the first cavity 111. The threaded fastener passes through the threaded groove 13 and cooperates with the coil assembly 31. By rotating the threaded fastener, the tightness of the coil assembly 31 in the first cavity 111 can be controlled, thereby adjusting the position of the electromagnetic unit 3.

[0058] The valve island body 1 is also provided with a cover 6 for protecting the control unit 4. The cover 6 and the valve island body 1 are assembled to form a cavity for accommodating the control unit 4. After the control unit 4 is arranged in the cavity, epoxy resin is poured into the cavity to insulate and seal the control unit 4 to prevent it from being disturbed and damaged by the external environment.

[0059] A wire pressing plate is also provided on the top of the cover 6, and the lead wires of the coil assembly 31 are connected to the control unit 4. The power line and signal line on the control unit 4 pass through the cover 6 and are pressed and fixed by the wire pressing plate. This design not only ensures the firmness and reliability of the wiring, but also facilitates the later maintenance and replacement.

[0060] When the control unit 4 receives an external signal or a control instruction of a preset program, it will accurately control the power-on state of each electromagnetic unit according to the instruction. After being energized, the coil assembly 31 generates magnetic force, adsorbs the armature 32 and the valve core 21, and moves the valve core 21 up and down to control the on-off and conduction ratio of the fluid. By adjusting the magnetic force of the electromagnetic unit and the movement amplitude of the valve core 21, the fluid flow rate can be accurately controlled.

[0061] Example 2

[0062] like Figure 6-Figure 8 As shown, the present invention also discloses a high-speed switching valve island driving method.

[0063] The valve island system of the present invention is composed of a plurality of unit valves 2 , each of which contains an electromagnetic component and a switch element 42 .

[0064] The steps to implement this method are as follows:

[0065] S100, in the initial stage, the electromagnetic components corresponding to each group of unit valves 2 are numbered for subsequent control and management. At the same time, the working parameters of the electromagnetic coil 312 and the switch element 42 are obtained in real time, including the current limit value, the basic frequency, etc.

[0066] S200, during the driving process, the system monitors the current value passing through each electromagnetic unit 3 in real time to ensure that the current fluctuates within a safe range to avoid overheating or damage. At the same time, the system also captures the rising and falling edge signals of the switch element 42, calculates the duty cycle of the input signal, and can reflect the characteristics and requirements of the input signal, providing a basis for subsequent control strategies.

[0067] S300, determining whether the unit valve 2 is in the holding stage, and determining whether to open the next unit valve 2 according to the detection result.

[0068] The operation of the electromagnetic unit 3 of the present invention is divided into three stages: a strong excitation stage, a holding stage and a closing stage.

[0069] Strong excitation stage: When the unit valve 2 needs to be opened quickly, the system first enters the strong excitation stage. In this stage, by controlling the switch members 42 at both ends of the electromagnetic unit 3, the electromagnetic components are excited with a higher current and frequency, thereby quickly generating sufficient magnetic force to attract the valve core 21 to move, thereby realizing the rapid opening of the unit valve 2.

[0070] In the strong excitation stage, the current passes through the positive pole of the power supply, the high-side MOS tube, the electromagnetic coil 312, the low-side MOS tube, and the power ground in sequence. The opening time of the strong excitation stage of different valves is between 0.9ms and 2.2ms, during which the high-side and low-side MOS tubes remain fully open. The high-side MOS tube and the low-side MOS tube are switch elements 42 respectively connected to the two ends of the coil.

[0071] Holding stage: Once the unit valve 2 is fully opened, the system enters the holding stage. In this stage, the high (or low) side MOS tube is kept fully open, and the control signal of the low (or high) side MOS tube is a base frequency of 5kHz and a duty cycle of 5% to 7%; during the opening of the low side MOS tube, the current direction is consistent with the current direction in the strong excitation stage; during the closing of the low side MOS tube, the current is carried out through the diode, the high side MOS tube, and the electromagnetic coil 312 in sequence.

[0072] Closing stage: when the unit valve 2 needs to be closed, the high-side and low-side MOS tubes remain fully closed. Under the action of the inductance of the coil (6-2), the current passes through the power ground, the diode, the coil, the diode, and the positive electrode of the power supply in sequence to charge the power supply, so that the current of the electromagnetic coil 312 drops rapidly, thereby accelerating the attenuation of the electromagnetic force on the armature 32, causing the valve core 21 to close faster under the action of the spring.

[0073] In the scenario where multiple unit valves 2 need to be opened at the same time, the present invention adopts an intelligent multi-valve control strategy. The system first obtains the basic frequency value of the switch element 42 and the duty cycle of the input signal, and then determines whether the previous unit valve 2 is in the holding stage based on this information. If the previous unit valve 2 has been stably opened and entered the holding stage, the system will continue to open the next unit valve 2. This sequential control strategy ensures that each unit valve 2 can operate in a safe and stable state, avoiding current overload or system instability caused by opening multiple valves at the same time.

[0074] For example, the microcontroller detects a value from 1 to 16 ( Figure 8 ), first open 1, and when the current of 1 enters the holding stage, open 2, and so on, until all 4 valves are opened (other situations are similar, such as from 1 to 4, 1 to 8, 1 to 13, etc.); that is, when it is detected that two or more valves need to change from closed to open at the same time, the above control strategy is adopted.

[0075] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A high-speed switching valve island, characterized in that: The high-speed switching valve island comprises: The valve island body has a first valve channel; At least two sets of unit valves are arranged in the valve island body, the unit valves include a second valve channel, the first valve channel is communicated with the second valve channel, and are used to form a path for fluid to pass; An electromagnetic unit is arranged in the valve channel body, the electromagnetic unit is located above the unit valve, and is used to control the unit valve to cut off or conduct fluid; A control unit, used to control the electromagnetic unit to achieve rapid switching and flow control, the control unit comprising a component carrier and a switch element arranged on the component carrier, a driving chip for driving the switch element to operate, a power supply element for powering the component, and a main control chip; The electromagnetic unit is jointly controlled by at least two switch elements.

2. The high-speed switching valve island according to claim 1, characterized in that: The electromagnetic unit includes a mounting seat and an electromagnetic coil, wherein the electromagnetic coil is arranged in the mounting seat, and the control unit can control the magnetic field direction and magnetic force of the electromagnetic coil and thus control the on or off of the unit valve.

3. The high-speed switching valve island according to claim 2, characterized in that: The unit valve includes a valve sleeve and a valve core. The valve sleeve is fixedly arranged in the valve island body, and the valve core is movably arranged in the valve sleeve. The valve core can move up and down under the control of the electromagnetic component.

4. The high-speed switching valve island according to claim 3, characterized in that: The switch element may be a MOS tube, a thyristor or a combination of one or more of the two; The switch element is connected to two ends of the coil respectively.

5. The high-speed switching valve island according to claim 3 or 4, characterized in that: The electromagnetic unit also includes an armature, the valve core is connected to the armature through bolts, an elastic member is also provided between the armature and the mounting seat, and the armature is arranged between the mounting seat and the valve core.

6. A high-speed on-off valve island driving method, characterized in that: The high-speed on-off valve island driving method is implemented based on the high-speed on-off valve island according to any one of claims 1 to 5, and the high-speed on-off valve island driving method comprises: The electromagnetic components in each group of the unit valves are numbered, the current value passing through each electromagnetic coil is obtained, and the rising edge and falling edge of the switch element are obtained at the same time, the duty cycle of the input signal is calculated, and the valve island is controlled in combination; The operation of the electromagnetic unit includes at least two stages, including a strong excitation stage and a closing stage. In the strong excitation stage, the on-off speed of the unit valve can be accelerated by controlling the switch elements located at both ends of the electromagnetic unit.

7. The high-speed on-off valve island drive method according to claim 6, characterized in that: The phase also includes a holding phase; When a plurality of the unit valves need to be opened, the basic frequency value of the switch element and the duty cycle of the input signal are obtained to determine whether the previous unit valve is in the holding stage, and then the next unit valve is opened.

8. The high-speed on-off valve island drive method according to claim 7, characterized in that: In the holding stage, the fundamental frequency of one of the switch elements of the electromagnetic unit is 4.5-5.5 kHz, and the duty cycle of the input signal is 5-7%.

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