Digital valve terminal

Abstract

The utility model discloses a digital valve terminal which comprises a valve terminal body with a plurality of containing cavities, at least two unit valves, an electromagnetic unit and a control unit. The unit valve is arranged in the containing cavity and used for being matched with the electromagnetic valve body to conduct or cut off fluid. The electromagnetic unit is used for driving the unit valve to act, connected with the control unit and coupled with the unit valve. The control unit is arranged on the valve terminal body and used for controlling the electromagnetic unit to act and providing a power source. The valve terminal body is further provided with an adjusting piece used for fixing and adjusting the position of the coil assembly. The unit valve comprises a valve element and a valve sleeve, and the valve element is movably arranged in the valve sleeve. The electromagnetic unit further comprises an armature and an elastic piece which are used for increasing magnetic flux and providing reset acting force. The valve element and the valve sleeve are matched to form a sharp edge and a chamfer for cutting off fluid. A flow guide hole and a storage cavity are formed in the valve sleeve and used for temporarily storing fluid. The utility model has the advantages of simple structure, accurate control, good sealing performance, good diversion effect and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a digital valve island and a control method thereof. BACKGROUND

[0002] In the field of industrial automation, valve islands are widely used in various industrial equipment and production lines as key components in fluid control systems. Traditional valve islands usually use analog signals for control, and each electromagnetic valve unit is often independently set, which not only increases the complexity and maintenance cost of the system, but also limits the flexibility and scalability of the system. With the development of digital technology, digital valve islands have emerged, which integrate multiple electromagnetic valve units on a valve island body and use digital signals for control, achieving system simplification, efficiency and intelligence.

[0003] However, existing digital valve islands still have some problems in design and use. For example, the arrangement and fixation of electromagnetic valve units are not flexible enough, resulting in complex structure of the valve island body and difficulty in adjustment; the driving method and control precision of electromagnetic units need to be improved to better meet the needs of fluid control systems. SUMMARY

[0004] (I) Technical problems to be solved

[0005] To solve the above problems, the present application proposes a digital valve island, aiming to solve the problem of the arrangement and fixation of electromagnetic valve units in the prior art, which are not flexible enough, resulting in complex structure of the valve island body and difficulty in adjustment.

[0006] (II) Technical solutions

[0007] The digital valve island of the present application comprises:

[0008] a valve island body having a plurality of cavities, one end of the cavity having an opening, the valve island body being provided with a channel for fluid to pass through;

[0009] at least two unit valves, respectively arranged in the cavities, for cooperating with the electromagnetic valve body to conduct or cut off the fluid passing through the valve island;

[0010] an electromagnetic unit arranged in the cavity for driving the unit valve to act to realize conduction or cutoff, the electromagnetic unit being coupled to the unit valve, and the number of electromagnetic units corresponding to the number of unit valves;

[0011] a control unit arranged on the valve island body for controlling the electromagnetic unit to act and providing a power source;

[0012] The electromagnetic unit comprises a coil assembly connected with the control unit, and an adjusting member for fixing and adjusting the position of the coil assembly is further arranged on the valve island body, the adjusting member is provided with a connecting thread, and the valve island body is provided with a threaded groove in communication with the cavity, the adjusting member is arranged in the threaded groove, and the tightness of the coil assembly can be controlled by controlling the position of the adjusting member in the threaded groove, so that the position of the coil assembly is adjusted.

[0013] In the utility model, the unit valve comprises a valve core and a valve sleeve with a discharge port, the valve sleeve is fixed in the cavity, and the valve core is movably arranged in the valve sleeve and can move up and down in the valve sleeve.

[0014] In the utility model, the electromagnetic unit further comprises an armature for increasing the magnetic flux when the coil assembly works, thereby increasing the magnetic force, the armature is arranged between the coil assembly and the valve core, and the armature is fixedly connected with the valve core.

[0015] The coil assembly is provided with a groove, an elastic member is arranged in the groove, one end of the elastic member abuts against the armature, and the elastic member is used for pressing the valve core and providing a reset force.

[0016] In the utility model, the lower part of the outer side of the valve core is provided with a sharp edge, the lower part of the valve sleeve is provided with a chamfer for cutting off fluid in cooperation with the sharp edge, and the unit valve is closed when the sharp edge abuts against the chamfer.

[0017] In the utility model, the side of the valve sleeve is provided with a flow guide hole, the valve core is provided with an annular groove in the same horizontal plane as the flow guide hole, a storage cavity is formed between the annular groove and the valve sleeve, and the storage cavity is used for temporarily storing fluid passing through the electromagnetic valve body.

[0018] (Three) beneficial effects

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] (1) In the utility model, a plurality of cavities are arranged on the valve island body, and the unit valve and the electromagnetic unit are arranged in the cavities, respectively, so that the integration and modularization of the electromagnetic valve unit are realized, the structure of the valve island body is simplified, and the manufacturing cost and maintenance difficulty are reduced.

[0021] (2) In the utility model, the electromagnetic unit is coupled with the unit valve, and the number of electromagnetic units corresponds to the number of unit valves, so that independent control and accurate driving of each electromagnetic valve unit are realized, and the flexibility and control accuracy of the system are improved.

[0022] (3) The adjusting member is arranged on the valve island body, and the position of the adjusting member in the threaded groove is controlled, so that the tightness and position of the coil assembly can be conveniently adjusted, and the working performance of the electromagnetic unit is accurately adjusted and optimized. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0024] Figure 1 It is a sectional structure schematic diagram of the valve island;

[0025] Figure 2 It is an explosion structure schematic diagram of the unit valve and the electromagnetic unit;

[0026] Figure 3 It is a connection structure schematic diagram of the unit valve;

[0027] Figure 4 It is a schematic diagram of the coil assembly;

[0028] Figure 5 It is a sectional structure schematic diagram of the electromagnetic unit.

[0029] 1, valve island body, 11, cavity, 111, first cavity, 112, second cavity, 12, hole, 13, threaded groove;

[0030] 2, unit valve, 21, valve core, 211, sharp edge, 212, annular groove, 213, pressure equalizing groove, 22, valve sleeve, 221, chamfer, 222, flow guide hole, 223, discharge port, 23, first valve channel, 24, second valve channel;

[0031] 3, electromagnetic unit, 31, coil assembly, 311, mounting seat, 312, electromagnetic coil, 313, cavity, 314, groove, 32, armature, 34, elastic member;

[0032] 4, control unit, 41, element carrier, 42, switch member, 43, drive chip, 44, power supply member, 45, main control chip;

[0033] 5, adjusting member;

[0034] 6, cover. DETAILED DESCRIPTION

[0035] Embodiment 1

[0036] As Figure 1As shown, the digital valve terminal of the present application mainly comprises a valve terminal body 1, unit valves 2, electromagnetic units 3, control units 4 and adjusting members 5 and other key components.

[0037] The valve terminal body 1 is made of high-strength and corrosion-resistant material, and is internally designed with multiple cavities 11. Each cavity is provided with an opening at one end, facilitating the installation of the unit valves 2 and the electromagnetic units 3. The cavities 11 further comprise first cavities 111 and second cavities 112. Referring to Figure 1 , the first cavities 111 are arranged at the upper part of the valve terminal body, with their openings arranged upward, for accommodating the electromagnetic units 3; the second cavities 112 are arranged at the lower part of the valve terminal body, with their openings arranged downward, for accommodating the unit valves 2. In particular, the first cavities 111 and the second cavities 112 are in communication with each other, so that the electromagnetic units 3 can better drive and control the actions of the unit valves 2.

[0038] As shown, Figures 1-2 , the valve terminal body 1 is further provided with a channel 12 for fluid to pass through, ensuring that the fluid can smoothly enter and exit the unit valves 2 and then flow out of the unit valves 2. The valve terminal body 1 serves as the support structure of the entire system, and is internally designed with a first valve channel 23 as the inlet and outlet of fluid or gas medium. Inside the valve terminal body 1, at least two unit valves 2 are arranged, each provided with a second valve channel 24 in communication with the first valve channel 23, together constituting the main path for fluid or gas to pass through, with the flow direction indicated by the arrows as shown in Figure 1 . The design of the unit valves adopts a modular approach, facilitating flexible increase or decrease in number according to actual needs, improving the scalability and adaptability of the system. In particular, in this embodiment, the first valve channel 23 serves as the inlet, and the multiple second valve channels 24 serve as the outlet; according to actual needs, the multiple second valve channels 24 can also be used as inlets, while the first valve channel 23 is used as an outlet.

[0039] Specifically, as shown, Figures 2-3 , the unit valves 2 are the core components for controlling the on-off of fluid, and each second cavity 112 is provided with one unit valve 2. In this embodiment, the number of the second cavities 112 and the unit valves 2 is four. The outer side wall of the unit valve 2 is provided with external threads, and the inner side wall of the second cavity 112 is provided with internal threads matched with the external threads, i.e. the unit valve 2 is connected and fitted in the second cavity 112 through the threads.

[0040] The unit valve 2 comprises a valve core 21 and a valve sleeve 22 with a discharge port 223. The valve sleeve 22 is fixed in the cavity 11, while the valve core 21 is movably arranged in the valve sleeve 22 and can move up and down to control the on-off 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 which 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.

[0041] The side of the valve sleeve 22 is provided with a flow guide hole 222, and the valve core 21 is provided with an annular groove 212 which is located at the same horizontal plane as the flow guide hole 222. The annular groove 212 and the valve sleeve 22 form a storage cavity therebetween for temporarily storing the fluid passing through the electromagnetic valve body. This design helps to reduce fluid impact and improve the stability of fluid control. In addition, the valve core 21 is also provided with uniformly distributed pressure equalizing grooves 213 for preventing the valve core from being stuck under high pressure. The pressure equalizing grooves 213 are arranged above the annular groove 212, which can effectively disperse the fluid pressure and prolong the service life of the valve core.

[0042] The electromagnetic unit 3 is used to drive the valve core 21 of the unit valve 2 to act, and the number thereof corresponds to the number of the unit valve 2. The electromagnetic unit comprises a coil assembly 31, an armature 32 and the coil assembly 31. The coil assembly 31 is connected with the control unit 4, and the size of the magnetic force of the coil assembly 31 is changed by controlling the current flowing through the coil assembly 31, so as to drive the valve core 21 to act.

[0043] The coil assembly 31 comprises a mounting seat 311 and at least one electromagnetic coil 312, and 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, and after the electromagnetic coil 312 is mounted, 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 further comprises the armature 32, which is arranged in the first cavity 111 and located between the coil assembly 31 and the valve core 21, and the valve core 21 is fixedly connected by a bolt.

[0044] In order to better compress the valve core, the coil assembly 31 is provided with a groove 314, and an elastic member 34 is arranged 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.

[0045] Referring to FIGS. 1-4, Figure 1 , Figure 4 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 energization state of each coil assembly 31 according to external signals or preset programs, so as to accurately control the conduction ratio of the unit valve 2.

[0046] The control unit 4 is the brain of the entire valve island, which integrates key components such as the element carrier 41, the switch component 42, the drive chip 43, the power supply component 44, and the main control chip 45. In this embodiment, the element carrier 41 is a circuit board. The switch component 42 uses semiconductor devices such as MOS tubes or silicon-controlled rectifiers. These switch components 42 are respectively connected to both ends of the coil, and the current in the coil is adjusted by controlling the on-off state of the switch component 42, thereby controlling the generation and disappearance of the magnetic field, and achieving fast 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 application is jointly controlled by the switch components 42 connected to both ends of the electromagnetic coil 312, forming a redundant design to ensure stable operation under extreme conditions.

[0047] The main control chip 45 in the control unit 4 is responsible for receiving external instructions and calculating corresponding control signals according to a pre-set logic algorithm. These signals are amplified by the drive chip and directly act on the switch component 42 to accurately regulate the current of the electromagnetic coil 312. At the same time, the power supply component 44 provides stable operating voltage for the entire control unit 4 and the electromagnetic unit 3, ensuring continuous and stable operation of the system.

[0048] Through the above design, the high-speed switch valve island of the present application can realize fast switching and accurate regulation of the fluid path, with fast response speed and high control precision, which 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.

[0049] As shown in Figure 5 The adjusting component 5 is used to fix and adjust the position of the electromagnetic unit 3. In this embodiment, the adjusting component 5 uses threaded fasteners such as bolts, screws, studs, etc. The valve island body 1 is provided with a threaded groove 13 communicating with 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, and thus the position of the electromagnetic unit 3 can be adjusted.

[0050] The valve island body 1 is also provided with a cover 6 for protecting the control unit 4. The cover 6 is fitted with the valve island body 1 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, preventing it from being disturbed and damaged by the external environment.

[0051] The top of the cover 6 is also provided with a wire pressing plate, and the lead-out wire of the coil assembly 31 is connected with the control unit 4. The power supply wire and the signal wire on the control unit 4 pass through the cover 6 and are 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.

[0052] When the control unit 4 receives the external signal or the control instruction of the preset program, it accurately controls the energization state of each electromagnetic unit according to the instruction. The coil assembly 31 generates a magnetic force after being energized, adsorbs the armature 32 and the valve core 21, and makes the valve core 21 act 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 action amplitude of the valve core 21, the accurate control of the fluid flow can be realized.

[0053] Embodiment 2

[0054] The application also discloses a high-speed on-off valve island driving method.

[0055] The valve island system of the application is composed of a plurality of unit valves 2, each of which internally comprises an electromagnetic assembly and a switch piece 42.

[0056] The implementation steps of the method are as follows:

[0057] S100, in the initial stage, the electromagnetic assemblies 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 piece 42 are obtained in real time, including the current limit value, the basic frequency and the like.

[0058] S200, in 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 and avoids overheating or damage. At the same time, the system also captures the rising edge and falling edge signals of the switch piece 42, calculates the duty cycle of the input signal, and can reflect the characteristics and requirements of the input signal, thereby providing a basis for the subsequent control strategy.

[0059] S300, whether the unit valve 2 is in the holding stage is judged, and whether the next unit valve 2 is opened is judged according to the detection result.

[0060] The operation of the electromagnetic unit 3 of the application is divided into three stages: a strong excitation stage, a holding stage and a closing stage.

[0061] The strong excitation stage: when the unit valve 2 needs to be quickly opened, the system first enters the strong excitation stage. In this stage, the electromagnetic assembly is excited by controlling the switch piece 42 located at both ends of the electromagnetic unit 3 with high current and frequency, so as to quickly generate sufficient magnetic force to attract the valve core 21 to move, thereby realizing the quick opening of the unit valve 2.

[0062] When 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 negative pole of the power supply in sequence, and the opening time of the strong excitation stage of different valves is between 0.9ms and 2.2ms, during which the high-side MOS tube and the low-side MOS tube are kept fully open. The high-side MOS tube and the low-side MOS tube are switch pieces 42 connected at both ends of the coil.

[0063] The holding stage: once the unit valve 2 is opened to the position, the system enters the holding stage. In this stage, the high (or low) side MOS tube keeps fully open, and the control signal of the low (or high) side MOS tube is the base frequency of 5 kHz with a duty cycle of 5%-7%; during the opening of the low side MOS tube, the current direction is consistent with that in the strong excitation stage; during the closing of the low side MOS tube, the current flows through the diode, the high side MOS tube, and the electromagnetic coil 312 in sequence for freewheeling.

[0064] The closing stage: when it is needed to close the unit valve 2, the high and low side MOS tubes keep fully closed, and under the action of the inductance of the coil (6-2), the current flows through the power supply ground, the diode, the coil, the diode, and the power supply positive pole in sequence to charge the power supply, so that the current of the electromagnetic coil 312 rapidly decreases, thereby the electromagnetic force on the armature 32 rapidly attenuates, and the spool 21 accelerates to close under the action of the spring.

[0065] In the scenario of needing to open multiple unit valves 2 at the same time, the application adopts an intelligent multi-valve control strategy. The system first acquires the base frequency value of the switch 42 and the duty cycle of the input signal, and then determines whether the last unit valve 2 has entered the holding stage according to these information. If the last 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 work in a safe and stable state, avoiding the problem of current overload or system instability caused by opening multiple valves at the same time.

[0066] For example, if the single-chip microcomputer detects a jump from 1 to 16, it first opens 1, and then opens 2 when the current of 1 enters the holding stage, and so on, until all 4 valves are opened (similar to other cases, 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 be opened at the same time, the above control strategy is adopted.

[0067] The above-described embodiments are merely preferred embodiments of the application, and do not limit the concept and scope of the application. Various modifications and improvements to the technical solutions of the application made by those skilled in the art without departing from the design concept of the application shall fall within the protection scope of the application, and the technical content claimed by the application has been fully recorded in the claims.

Claims

1. A digital valve terminal, characterized by The valve island comprises: a valve island body with multiple cavities, one end of which has an opening, and a channel for fluid passing through is arranged on the valve island body; at least two unit valves, each arranged in a cavity, for cooperating with the electromagnetic valve body to conduct or cut off the fluid passing through the valve island; an electromagnetic unit arranged in the cavity for driving the unit valve to act to conduct or cut off, the electromagnetic unit is coupled to the unit valve, and the number of electromagnetic units corresponds to the number of unit valves; a control unit arranged on the valve island body for controlling the electromagnetic unit to act and providing a power source; the electromagnetic unit comprises a coil assembly, the coil assembly is connected to the control unit, and the valve island body is further provided with an adjusting member for fixing and adjusting the position of the coil assembly, the adjusting member has a connecting thread, and the valve island body is provided with a threaded groove in communication with the cavity, the adjusting member is arranged in the threaded groove, and the tightness of the coil assembly can be controlled by controlling the position of the adjusting member in the threaded groove to adjust the position of the coil assembly.

2. The digital valve terminal according to claim 1, characterized in that The unit valve comprises a valve core and a valve sleeve with a discharge port, the valve sleeve is fixed in the cavity, and the valve core is movably arranged in the valve sleeve, and the valve core can act up and down in the valve sleeve.

3. The digital valve terminal according to claim 2, characterized in that The electromagnetic unit further comprises an armature for increasing the magnetic flux when the coil assembly works, thereby increasing the magnetic force, the armature is arranged between the coil assembly and the valve core, and the armature is fixedly connected to the valve core; a recess is arranged on the coil assembly, an elastic member is arranged in the recess, one end of the elastic member abuts against the armature for pressing the valve core and providing a reset force.

4. The digital valve terminal according to claim 2 or 3, characterized in that A sharp edge is arranged at the lower part of the outer side of the valve core, and a chamfer for cooperating with the sharp edge to cut off the fluid is arranged at the lower part of the valve sleeve, and the sharp edge abuts against the chamfer to close the unit valve.

5. The digital valve terminal according to claim 2, characterized in that A flow guide hole is arranged on the side of the valve sleeve, and an annular recess on the same horizontal plane as the flow guide hole is arranged on the valve core, a storage cavity is formed between the annular recess and the valve sleeve for temporarily storing the fluid passing through the electromagnetic valve body.

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