A control circuit, a circuit board and an air-operated shaker
By using a simple circuit structure with a timer chip and an RC timing network, the problems of high control cost and complicated installation of pneumatic vibrators were solved, realizing low-cost and flexible control of pneumatic vibrators and improving the efficiency of chemical production.
Patent Information
- Application Number
- CN202522728485.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-23
AI Technical Summary
In the existing technology, the existing pneumatic rapper control system is expensive, cumbersome to install, and difficult to popularize in simple scenarios.
A simple circuit structure combining a timer chip and an RC timing network is used to generate a precise periodic timing signal through the charging and discharging process of a capacitor, which controls the rapping time and interval time of the pneumatic rapper, replacing a complex DCS or PLC system.
It achieves low-cost and flexible control of pneumatic vibrators, reduces equipment investment and maintenance costs, improves chemical production efficiency, and reduces potential equipment hazards.
Smart Images
Figure CN224934325U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrical and electronic technology, and more specifically, to a pneumatic vibrator control circuit, a circuit board including the pneumatic vibrator control circuit, and a pneumatic vibrator including the circuit board. Background Technology
[0002] In chemical production processes, materials tend to adhere to the inner walls of reaction vessels and feed pipes when being fed into containers such as reaction tanks and stirred tanks. A vibrator is typically used to generate periodic vibrations to dislodge the material. Vibrators are generally divided into electric and pneumatic types. Electric vibrators are simple in structure and easy to control, but their hammering force is usually not adjustable, and excessive impact force can easily damage the tank or pipe structure, limiting their applicability. Pneumatic vibrators overcome this deficiency. Their single-vibration force and frequency can be flexibly controlled by adjusting the start and stop time parameters of the solenoid valve, achieving a gentler and more controllable vibration effect, and thus having a wider range of applications. However, to achieve precise control of the solenoid valve's opening and closing time, currently, distributed control systems or programmable logic controllers are commonly used. These centralized control systems are expensive, greatly increasing equipment investment; moreover, the installation and commissioning process is cumbersome, requiring the laying of a large number of cables and complex software configuration, demanding highly skilled technicians, and lacking flexible deployment. Utility Model Content
[0003] The purpose of this application is to provide a pneumatic vibrator control circuit, a circuit board including the pneumatic vibrator control circuit, and a pneumatic vibrator including the circuit board, in order to solve the technical problems of high control cost, complicated installation, and difficulty in popularizing pneumatic vibrators in simple scenarios in the prior art.
[0004] To achieve this objective, the technical solution adopted in this application is: The first aspect of this application provides a control circuit for a pneumatic vibrator, comprising: The power module is used to provide DC operating voltage; The timer chip has its threshold pin connected to its trigger pin; An RC timing network includes a timing capacitor and an adjustable resistor unit. One end of the timing capacitor is grounded, and the other end is connected to the threshold pin and trigger pin of the timer chip, as well as one end of the adjustable resistor unit. The other end of the adjustable resistor unit is connected to the output terminal of the power supply module. The discharge pin of the timer chip is connected to the other end of the timing capacitor through the adjustable resistor unit. A switch driving circuit, the input of which is connected to the output pin of the timer chip; An actuator relay is used, the coil of which is connected between the output terminal of the power module and the output terminal of the switch drive circuit.
[0005] In addition to one or more features described herein, or alternatively, further embodiments of the pneumatic rapper control circuit may include: the RC timing network further including a plurality of capacitor pads arranged in parallel, each of the capacitor pads being used to solder capacitors of different capacitance values to collectively form the timing capacitor.
[0006] In addition to one or more features described herein, or alternatively, further embodiments of the pneumatic vibrator control circuit may include: the adjustable resistor unit comprising a potentiometer and a plurality of fixed resistors connected in parallel in the circuit of the potentiometer and selectively accessible by a short circuit.
[0007] In addition to one or more features described herein, or as an alternative, further embodiments of the pneumatic vibrator control circuit may include: the switch drive circuit includes a PNP transistor and a base limiting current resistor connected between the output pin of the timer chip and the base of the PNP transistor, the emitter of the PNP transistor being connected to the output terminal of the power module, and its collector serving as the output terminal of the switch drive circuit.
[0008] In addition to one or more features described herein, or as an alternative, further embodiments of the pneumatic vibrator control circuit may include: the timer chip being an NE555 timer circuit.
[0009] In addition to one or more features described herein, or as an alternative, further embodiments of the pneumatic vibrator control circuit may include: the power module comprising a rectifier bridge, a filter capacitor, and a voltage regulator chip connected in sequence.
[0010] In addition to one or more features described herein, or as an alternative, further embodiments of the pneumatic vibrator control circuit may include: the voltage regulator chip being a 7812 three-terminal voltage regulator.
[0011] In addition to one or more features described herein, or alternatively, further embodiments of the pneumatic vibrator control circuit may include: the timing capacitor being an electrolytic capacitor with a capacitance in the range of 100 to 10000 μF; and / or, the potentiometer in the adjustable resistor unit being an adjustable resistor with a resistance in the range of 0 to 1 MΩ.
[0012] A second aspect of this application provides a circuit board configured with the aforementioned pneumatic vibrator control circuit.
[0013] A third aspect of this application provides a pneumatic vibrator, including a housing, a solenoid valve, a control box installed inside the housing, and a circuit board as described above disposed inside the control box; wherein the output terminal of the circuit board is connected to the solenoid valve to control the periodic opening and closing of the solenoid valve.
[0014] One of the above technical solutions has the following advantages or beneficial effects: by adopting a simple circuit structure with a timer chip as the core, it replaces a complex DCS or PLC system, resulting in low cost and flexible deployment. Specifically, the timer chip works in conjunction with an RC timing network to generate precise periodic timing signals through the charging and discharging process of a capacitor, enabling flexible control of the rapping time and interval time. The switch drive circuit and the execution relay can convert this timing signal into on / off control of the solenoid valve of the pneumatic rapper. This solution achieves precise timing control functions with only a small number of general-purpose electronic components, significantly reducing costs, facilitating installation and use, and can be widely applied in chemical enterprises to improve chemical production efficiency and reduce equipment hazards.
[0015] Other advantages of this application and the technical effects of preferred embodiments will be further described in the detailed embodiments below. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a circuit diagram of the pneumatic vibrator control circuit provided in the embodiments of this application. Detailed Implementation
[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.
[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0020] In this article, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0021] Furthermore, in the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0022] This application provides a pneumatic vibrator control circuit, including a power module, a timer chip, an RC timing network, a switch driver circuit, and an execution relay. The power module provides a stable DC operating voltage required by the system, which is fundamental to the circuit's operation. The timer chip, the core logic unit of this circuit, has its threshold and trigger pins connected in parallel to form an astable operating mode, used to monitor the voltage of the timing capacitor in the RC timing network. The RC timing network determines the timing accuracy and includes a timing capacitor and an adjustable resistor unit. It should be noted that the timing capacitor is the carrier for charging and discharging, while the adjustable resistor unit is used to adjust the charging and discharging speed. One end of the timing capacitor is grounded, and the other end is connected to the threshold pin and trigger pin of the timer chip, as well as one end of the adjustable resistor unit. The other end of the adjustable resistor unit is connected to the output terminal of the power module. The discharge pin of the timer chip is connected to the other end of the timing capacitor through the adjustable resistor unit. The input terminal of the switch driver circuit is connected to the output pin of the timer chip to amplify the weak signal output by the timer chip. The relay coil is connected between the output of the power module and the output of the switch drive circuit. As an electrical switch, it controls the opening and closing of its contacts by energizing and de-energizing the coil, thereby safely driving the solenoid valve on and off. This solution, through the organic combination of the above structures, generates a stable rapping cycle without programming, achieving low-cost and high-reliability control.
[0023] In one embodiment of this application, the RC timing network further includes multiple capacitor pads arranged in parallel, each used to solder capacitors of different capacitance values to collectively form a timing capacitor. This scheme allows the total capacitance to be changed by soldering different numbers or capacitance values of capacitors, which can be understood as a coarse adjustment mechanism. Specifically, since the timing time is proportional to the RC product, increasing the capacitance will simultaneously prolong the charging and discharging times. However, through circuit design, it can be made to primarily affect the rapping time, thereby achieving coarse adjustment of the rapping time in the range of 0.1 to 10 seconds, providing users with a flexible and configurable solution.
[0024] In one embodiment of this application, the adjustable resistor unit includes a potentiometer and multiple fixed resistors connected in parallel in the potentiometer's circuit and selectively accessible via a short circuit. The potentiometer can be understood as a resistor with continuously variable resistance, used for fine, stepless adjustment of the time parameter. The multiple fixed resistors connected in parallel, selectively accessible via a short circuit (e.g., using jumper caps), can be understood as a resistance switching switch, used to significantly change the total resistance of the circuit, thereby achieving coarse adjustment of the gap time. The gap time is understood to be the duration during which the pneumatic vibrator stops working between two vibrations. This solution can effectively achieve precise control of the gap time within a wide range of 0.2 to 3600 seconds.
[0025] In one embodiment of this application, the switch driving circuit includes a PNP transistor and a base-limiting current resistor. The PNP transistor is a current-controlled semiconductor switch that conducts when its base is low. The base-limiting current resistor prevents excessive current from damaging the timer chip and the transistor. Specifically, the base-limiting current resistor is connected between the output pin of the timer chip and the base of the PNP transistor. The emitter of the PNP transistor is connected to the output terminal of the power module, and its collector serves as the output terminal of the switch driving circuit. This scheme utilizes the switching characteristics of the transistor to amplify the signal output by the timer to drive the relay coil, which is a key step in realizing the control of high-voltage power by low-voltage power.
[0026] In one embodiment of this application, the timer chip is an NE555 timer circuit. It should be noted that the NE555 is a widely used integrated timer circuit, which integrates an analog comparator, digital logic, and a power output stage. It is a timer chip with stable performance and low price. Using this timer circuit helps to control the cost of pneumatic rappers.
[0027] In one embodiment of this application, the power supply module includes a rectifier bridge, a filter capacitor, and a voltage regulator chip connected in sequence. The rectifier bridge converts alternating current (AC) into pulsating direct current (DC), the filter capacitor smooths the rectified voltage and reduces its ripple, and the voltage regulator chip stabilizes the filtered, unstable DC voltage at a precise 12V. A 7812 three-terminal regulator can be selected; the 7812 is a three-terminal linear regulator that outputs a positive 12V voltage and integrates overcurrent and overheat protection circuitry. This power supply module structure ensures the power supply stability of the timer chip, thereby ensuring the timing accuracy of the entire control circuit.
[0028] As an optional but non-limiting implementation, the timing capacitor is an electrolytic capacitor with a capacitance range of 100~10000μF, and the potentiometer in the adjustable resistor unit is an adjustable resistor with a resistance range of 0~1MΩ. The 100~10000μF electrolytic capacitor and the 0~1MΩ adjustable resistor can effectively achieve a wide range of time adjustment, and the combination of general-purpose components allows the pneumatic rapper proposed in this application to cover the needs of most industrial application scenarios.
[0029] Figure 1 This is a circuit diagram of the pneumatic vibrator control circuit provided in an embodiment of this application. Figure 1 Taking this application as an example, a specific implementation of a pneumatic vibrator control circuit will be described.
[0030] The pneumatic vibrator control circuit provided in this embodiment uses an NE555 timer chip as its core. Figure 1 As shown. The power supply module consists of a rectifier bridge BD12, filter capacitors C12 and C22, and a voltage regulator chip U2 (7812), which converts the externally input 12V AC or DC power supply into a stable 12V DC power. In the RC timing network, the timing capacitor is composed of electrolytic capacitors C72, C62, C52, and C42 connected in parallel. The total capacitance value can be adjusted by soldering different numbers of capacitors. The adjustable resistor unit consists of a potentiometer Rw2 and parallel fixed resistors R22, R32, and R42. Short-circuiting these resistors by jumpers or other means can change the total resistance value of the circuit. The threshold pin (pin 6) and trigger pin (pin 2) of the NE555 are shorted and connected to the positive terminal of the timing capacitor. The discharge pin (pin 7) is connected to the adjustable resistor unit. The output pin (pin 3) is connected to the base of the PNP transistor Q12 through the base limiting current resistor R72. The emitter of the transistor Q12 is connected to a 12V power supply, and the collector is connected to the coil of the execution relay K2. The other end of the relay coil is grounded. The normally open contact of the relay K2 is connected in series to the power supply circuit of the pneumatic vibrator solenoid valve.
[0031] Further reading Figure 1 The circuit works as follows: After the circuit is powered on, the 12V power supply charges the timing capacitors (C72, C62, C52, C42) through resistors R12, R22, R32, R42 and potentiometer Rw2. Since the capacitor voltage is initially zero, the NE555 outputs a high level, transistor Q12 is cut off, relay K2 is not energized, and the rapper does not operate; this stage is the interval time. When the capacitor voltage is charged to approximately 8V (2 / 3Vcc), the internal state of the NE555 flips, and the output becomes low, causing transistor Q12 to conduct, relay K2 to energize, and its contacts to close, energizing the solenoid valve. The pneumatic rapper begins to operate, and the duration of this operation is the rapping time. Simultaneously, the internal discharge tube of the NE555 conducts, and the capacitor begins to discharge through the path formed by potentiometer Rw2 and resistors R12, R22, R32, R42. When the capacitor voltage discharges to approximately 4V (1 / 3Vcc), the NE555 output flips to a high level again, transistor Q12 cuts off, relay K2 releases, and the rapping stops. The duration of this phase is the gap time. The circuit then restarts charging the capacitor, entering the next operating cycle. The rapping time can be coarsely adjusted by changing the total capacitance, while the gap time can be precisely adjusted by changing the resistance of potentiometer Rw2 and selecting a fixed resistor in parallel.
[0032] This solution hardware-izes the control logic of the pneumatic rapper, achieving timing control functions that previously required tens of thousands of yuan from a PLC using only general-purpose electronic components costing only a few yuan. Practical applications have also proven that the circuit operates stably and reliably, with a wide range of adjustable rapping and interval times, fully meeting the needs of chemical production sites. Its wide range of applications significantly reduces equipment investment and maintenance costs for enterprises.
[0033] This application also proposes a circuit board on which all electronic components of the aforementioned pneumatic rapper control circuit can be integrated and fixed using printed circuit board technology. This circuit board can serve as a standardized functional module, offering advantages such as compact structure, high reliability, and ease of mass production and maintenance.
[0034] This application also proposes a pneumatic vibrator, including a housing, a solenoid valve, a control box installed inside the housing, and a circuit board located inside the control box. The circuit board drives an execution relay inside the box through its output terminals, thereby controlling the solenoid valve of the pneumatic vibrator. This solution tightly integrates a low-cost, high-performance dedicated control circuit with the pneumatic vibrator body, forming a complete, independent, plug-and-play automated vibrating device, completely eliminating dependence on a central control system and achieving inherent low cost and convenience for the pneumatic vibrator.
[0035] Obviously, the above embodiments of this application are merely examples for clear illustration and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.
Claims
1. A control circuit for a pneumatic vibrator, characterized in that, include: The power module is used to provide DC operating voltage; The timer chip has its threshold pin connected to its trigger pin; An RC timing network includes a timing capacitor and an adjustable resistor unit. One end of the timing capacitor is grounded, and the other end is connected to the threshold pin and trigger pin of the timer chip, as well as one end of the adjustable resistor unit. The other end of the adjustable resistor unit is connected to the output terminal of the power supply module. The discharge pin of the timer chip is connected to the other end of the timing capacitor through the adjustable resistor unit. A switch driving circuit, the input of which is connected to the output pin of the timer chip; An actuator relay is used, the coil of which is connected between the output terminal of the power module and the output terminal of the switch drive circuit.
2. The pneumatic vibrator control circuit according to claim 1, characterized in that, The RC timing network also includes multiple capacitor pads connected in parallel, each of which is used to solder capacitors of different capacitance values to form the timing capacitor.
3. The pneumatic vibrator control circuit according to claim 1, characterized in that, The adjustable resistor unit includes a potentiometer and a plurality of fixed resistors connected in parallel in the circuit of the potentiometer and selectively connected by a short circuit.
4. The pneumatic vibrator control circuit according to claim 1, characterized in that, The switch driving circuit includes a PNP transistor and a base limiting current resistor. The base limiting current resistor is connected between the output pin of the timer chip and the base of the PNP transistor. The emitter of the PNP transistor is connected to the output terminal of the power module, and its collector serves as the output terminal of the switch driving circuit.
5. The pneumatic vibrator control circuit according to any one of claims 1 to 4, characterized in that, The timer chip is an NE555 timer circuit.
6. The pneumatic vibrator control circuit according to any one of claims 1 to 4, characterized in that, The power module includes a rectifier bridge, a filter capacitor, and a voltage regulator chip connected in sequence.
7. The pneumatic vibrator control circuit according to claim 6, characterized in that, The voltage regulator chip is a 7812 three-terminal voltage regulator.
8. The control circuit according to any one of claims 1 to 4, characterized in that, The timing capacitor is an electrolytic capacitor with a capacitance value in the range of 100~10000μF; And / or, the potentiometer in the adjustable resistor unit is an adjustable resistor with a resistance value in the range of 0~1MΩ.
9. A circuit board, characterized in that, It is equipped with a control circuit as described in any one of claims 1 to 8.
10. A pneumatic vibrator, characterized in that, The device includes a housing, a solenoid valve, a control box installed inside the housing, and a circuit board as described in claim 9 disposed inside the control box, wherein the output terminal of the circuit board is electrically connected to the solenoid valve.