CN111503350A

CN111503350A - Electromagnetic control valve

Info

Publication number: CN111503350A
Application number: CN202010281786.4A
Authority: CN
Inventors: 李伟园; 秦春城
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-11
Filing date: 2020-04-11
Publication date: 2020-08-07

Abstract

The invention relates to an electromagnetic control valve, comprising a winding coil, wherein: also includes the following: the transistor Q1, the transistor Q1 and the single-winding coil control the working state of the single-winding coil; the transistor Q1 is connected with the microprocessor MCU, a capacitor C1 is connected between the transistor Q1 and the microprocessor MCU in series; and the capacitor C3 and the capacitor C3 are connected in parallel with the single-winding coil and are used for maintaining the attraction of the electromagnetic valve. The invention has the beneficial effects that: the structure is composed of the single-winding coil, the microprocessor MCU and the transistor Q1, and the gas circuit is closed by implementing one-way control, so that the overall cost is lower. 2. By additionally arranging the direct current isolating circuit, the structure can ensure the microprocessor MUU to a great extent, and the electromagnetic control valve is in a closed state when in failure, so that the implementation is safer.

Description

Electromagnetic control valve

Technical Field

The invention relates to an electromagnetic control valve.

Background

The traditional electromagnets are powered by alternating current, and the corresponding working state can be maintained only by continuous power supply during working, but the electromagnets have large coil power consumption during working, and are easy to cause large heating of the coil and high failure rate; the other type is pulse power supply, the electromagnet starts working state under the driving of pulse electricity, meanwhile, the magnetic holding of the working state and the continuous work of the electromagnet are realized through the permanent magnet, after the working time is finished, the reset closing of the electromagnet execution part is realized through reverse pulse electricity, but the electromagnet has reverse function on the requirement of pulse signals of the corresponding control end, when the microprocessor is in fault or failure, the output state is uncertain (high level or low level), and the electromagnetic control valve cannot be ensured to be in the closed state.

From the structure of the solenoid control valve: the conventional electromagnetic control valve consists of two groups of windings, lead wires of the conventional electromagnetic control valve are respectively a yellow wire, a black wire and a red wire, the yellow wire is communicated with the black wire when the electromagnetic valve is opened and sucked, the yellow wire is communicated with the red wire when the suction is maintained, and when a microprocessor fails or fails, the air circuit cannot be ensured to be closed.

Disclosure of Invention

The object of the present invention is to overcome the drawbacks of the prior art described above and to provide a solenoid-operated valve which is safer to implement and less costly.

The invention describes an electromagnetic control valve comprising a single winding coil, wherein: also includes the following:

the transistor Q1, the transistor Q1 and the single-winding coil control the working state of the single-winding coil;

the transistor Q1 is connected with the microprocessor MCU, a capacitor C1 is connected between the transistor Q1 and the microprocessor MCU in series;

and the capacitor C3 and the capacitor C3 are connected in parallel with the single-winding coil and are used for maintaining the attraction of the electromagnetic valve.

Specifically, one end of the capacitor C1 is further connected with a resistor R1, the other end of the capacitor C1 is connected with a resistor R2, one end of the resistor R2 is connected with a ground terminal, and the capacitor C1, the resistor R1 and the resistor R2 form an isolation circuit.

Specifically, the transistor Q1 is connected to the a terminal or the B terminal of the single-winding coil.

Specifically, a diode D1 is connected to the collector of the transistor Q1.

Specifically, a capacitor C2 is connected to the collector of the transistor Q1.

Specifically, one end of the single-winding coil is connected to a direct-current power supply DC.

The invention has the beneficial effects that:

1. the structure is composed of the single-winding coil, the microprocessor MCU and the transistor Q1, and the gas circuit is closed by implementing unidirectional control, so that the overall cost is lower;

2. the structure is additionally provided with the direct current blocking circuit, and the direct current blocking circuit can only pass through a pulsating signal; since the output state is uncertain (high level or low level) when the microprocessor MUU is failed or fails, the microprocessor MUU can be greatly ensured, and the solenoid control valve is in a closed state when the microprocessor is failed, thereby being safer to implement.

Drawings

Fig. 1 is a circuit diagram of a first embodiment of the present invention.

Fig. 2 is a state diagram of the output pulse signal of the first embodiment.

Fig. 3 is a circuit diagram of a second embodiment of the present invention.

Fig. 4 is a state diagram of the output pulse signal of the second embodiment.

Fig. 5 is a circuit diagram of a third embodiment of the present invention.

Fig. 6 is a state diagram of the output pulse signal of the third embodiment.

Fig. 7 is a circuit diagram of a fourth embodiment of the present invention.

Fig. 8 is a state diagram of the output pulse signal of the fourth embodiment.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As shown in fig. 1 to 8, the present invention describes a solenoid-operated valve comprising a single-winding coil, wherein: also includes the following:

The structure is composed of the single-winding coil, the microprocessor MCU and the transistor Q1, and the gas circuit is closed by implementing unidirectional control, so that the overall cost is lower;

one end of the capacitor C1 is also connected with a resistor R1, the other end of the capacitor C1 is connected with a resistor R2, one end of the resistor R2 is connected with a ground terminal, and the capacitor C1, the resistor R1 and the resistor R2 form an isolation circuit. The structure is additionally provided with the direct current blocking circuit, and the direct current blocking circuit can only pass through a pulsating signal; since the output state is uncertain (high level or low level) when the microprocessor MUU is failed or fails, the microprocessor MUU can be greatly ensured, and the solenoid control valve is in a closed state when the microprocessor is failed, thereby being safer to implement.

The transistor Q1 is connected to the a terminal or the B terminal of the single-winding coil. The collector of the transistor Q1 is connected to a diode D1. The collector of the transistor Q1 is connected with a capacitor C2. One end of the single-winding coil is connected with a direct-current power supply DC.

When the microprocessor MCU outputs a high level, the transistor Q1 is conducted, the single-winding coil 1 is electrified, and the electromagnetic valve is in an open state. When no electricity is available or the microprocessor MCU is abnormal, the transistor Q1 is in a closed state, the single-winding coil 1 is in a power-off state, and the electromagnetic control valve is directly closed.

More specifically:

when the microprocessor MCU outputs a low level, the transistor Q1 is in a cut-off state, at the moment, a loop is formed from the positive pole of the power supply to the coil to the negative pole of the power supply, and the single-winding coil leads the electromagnetic valve to be in a static state because no current passes through;

when the microprocessor MCU outputs high level, the transistor Q1 is conducted, and the current generates magnetic force through the single winding coil, so that the electromagnetic valve acts to attract; in general, an electromagnetic valve needs to ensure that a movable iron core is in a stable state under the condition of no current, and needs to be implemented by means of an external force (for example, external forces such as a spring, an elastic sheet and the like are used for ensuring that the movable iron core is in a stable state), so that the electromagnetic valve needs a relatively large current to generate a corresponding magnetic force to push the movable iron core of the electromagnetic valve to move; however, after the electromagnetic valve acts, the movable iron core can be stabilized in the state after the action as long as a sufficiently small current is supplied; the driving mode has the advantages that the driving current after the electromagnetic valve acts can be reduced, so that the heating value of the coil of the electromagnetic valve is reduced, the service life of the coil is prolonged, the power consumption is reduced, and the electromagnetic valve is energy-saving and environment-friendly.

When the electromagnetic valve acts, the microprocessor MCU outputs a high level for 0.5 second, the 0.5 second is enough for the electromagnetic valve to act and implement an opening state, after the electromagnetic valve acts, the microprocessor MCU outputs a pulse level with a duty ratio of about one tenth, so that the transistor Q1 is in a state of continuous conduction and cutoff, and the coil obtains a relatively stable low voltage to maintain the state of the movable iron core through the charging and discharging action of the capacitor c3, wherein the resistor R1 prevents the transistor Q1 from being damaged due to overlarge driving current; the capacitor C1 can only pass through the pulse level under the cooperation of the resistor R2 (the resistor R2 can be replaced by a loop of the transistor Q1), and when the microprocessor MCU is damaged or fails, the high level can not pass through the resistor C1 and can not drive the transistor Q1.

As shown in fig. 1 and 3, the transistor Q1 is connected to the B-terminal of the single-winding coil 1. As shown in fig. 5 and 7, the transistor Q1 is connected to the a terminal of the single-winding coil 1.

The present solenoid control valve can be applied in a number of ways:

flame detection-ions (prior art, mature): sending pulse signals to control the novel electromagnetic control valve.

(ii) flame detection-thermocouple (used temporarily): sending pulse signals to control the novel electromagnetic control valve.

(III) flame detection-ignition needle (single needle, induction ignition integrated): sending pulse signals to control the novel electromagnetic control valve.

(IV) flame detection-general temperature sensor: sending pulse signals to control the novel electromagnetic control valve.

In conclusion, all parts capable of sending pulse signals can be matched with the novel electromagnetic control valve for use, and the use of other people is prevented.

The present invention is not limited to the above preferred embodiments, but rather, any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Solenoid control valve, comprising a single-winding coil (1), characterized in that: also includes the following:

the transistor Q1, the transistor Q1 and the single-winding coil (1) control the working state of the single-winding coil (1);

and the capacitor C3 and the capacitor C3 are connected in parallel with the single-winding coil (1) and are used for maintaining the attraction of the electromagnetic valve.

2. The solenoid control valve of claim 1, wherein: one end of the capacitor C1 is further connected with a resistor R1, the other end of the capacitor C1 is connected with a resistor R2, one end of the resistor R2 is connected with a ground terminal, and the capacitor C1, the resistor R1 and the resistor R2 form an isolation circuit.

3. The solenoid control valve of claim 1, wherein: the transistor Q1 is connected to the a terminal or the B terminal of the single-winding coil (1).

4. The solenoid control valve of claim 1, wherein: the collector of the transistor Q1 is connected to a diode D1.

5. The solenoid control valve of claim 1, wherein: the collector of the transistor Q1 is connected with a capacitor C2.

6. The solenoid control valve of claim 1, wherein: one end of the single-winding coil (1) is connected with a direct current power supply DC.