Electromagnetic valve control circuit and electromagnetic valve

Abstract

The utility model discloses an electromagnetic valve control circuit and an electromagnetic valve, the electromagnetic valve control circuit comprises a driving unit, the driving unit is electrically connected with a voltage dividing unit circuit and is used for sending a driving signal; the voltage division unit is electrically connected with the switch unit and is used for carrying out voltage division on a driving signal; and the switch unit is electrically connected with the power supply end, and the switch unit is electrically connected with the signal input end of the electromagnetic valve and used for starting the electromagnetic valve to work. Therefore, the electromagnetic valve control circuit can perform voltage division on the driving signal sent by the driving unit through the voltage division circuit, so that the driving signal of the control switch unit is limited in a certain voltage range, the electromagnetic valve control circuit can protect the electromagnetic valve from being damaged by high voltage, maintenance of a user is reduced, and normal production of a production line can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valve control, in particular to an electromagnetic valve control circuit and an electromagnetic valve. Background Art

[0002] With the continuous development of solenoid valves, solenoid valves are widely used in electromagnetically controlled industrial equipment. They are basic automation components used to control fluids. They belong to actuators and are not limited to hydraulic and pneumatic. They are used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. However, nowadays, solenoid valves are often damaged due to overpressure, which causes multiple damages to the solenoid valves, and then damages the electromagnetically controlled industrial equipment, causing maintenance and production delays, thereby greatly increasing the user's production costs. Utility Model Content

[0003] The main purpose of the utility model is to provide a solenoid valve control circuit and a solenoid valve, aiming to solve the problem that the solenoid valve control circuit is easily damaged by overvoltage, which leads to multiple damages of the solenoid valve, and then damages the solenoid-controlled industrial equipment, causing maintenance and production delays, thereby greatly increasing the user's production costs.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a solenoid valve control circuit, and the solenoid valve control circuit comprises:

[0005] A driving unit, the driving unit is electrically connected to the voltage dividing unit circuit and is used to send a driving signal;

[0006] A voltage dividing unit, the voltage dividing unit is electrically connected to the switch unit and is used to divide the voltage of the driving signal;

[0007] A switch unit is electrically connected to the power supply end, and the switch unit is electrically connected to the signal input end of the solenoid valve, and is used to start the solenoid valve to work.

[0008] Preferably, the solenoid valve control circuit further includes:

[0009] A transient suppression unit is electrically connected to the switch unit and the transient suppression unit is electrically connected to the signal input end of the solenoid valve, and is used to protect the solenoid valve from transient overvoltage.

[0010] Preferably, the driving unit includes a first resistor, a second resistor and a first transistor; the first end of the first resistor is electrically connected to the signal output end of the main control circuit, the second end of the first resistor is electrically connected to the first end of the second resistor and the base of the first transistor respectively, the second end of the second resistor and the emitter of the first transistor are grounded, and the collector of the first transistor is electrically connected to the voltage divider unit.

[0011] Preferably, the voltage divider unit includes a third resistor and a fourth resistor; the first end of the third resistor is electrically connected to the driving unit, the second end of the third resistor is electrically connected to the first end of the fourth resistor and the switching unit respectively, and the second end of the fourth resistor is electrically connected to the power supply end, the switching unit and the power supply end.

[0012] Preferably, the switching unit includes a first PMOS tube, a source of the first PMOS tube is electrically connected to the power supply end and the voltage divider unit respectively, a gate of the first PMOS tube is electrically connected to the voltage divider unit, and a drain of the first PMOS tube is electrically connected to the transient suppression unit and the signal input end of the solenoid valve.

[0013] Preferably, the transient suppression unit is specifically configured as a SMAJ30A diode.

[0014] In addition, to achieve the above-mentioned purpose, the utility model also provides a solenoid valve, which includes the solenoid valve control circuit as described above.

[0015] The technical solution of the utility model adopts a driving unit, the driving unit is electrically connected to the voltage dividing unit circuit, and is used to send a driving signal; a voltage dividing unit, the voltage dividing unit is electrically connected to the switch unit, and is used to divide the driving signal; the switch unit is electrically connected to the power supply end, and the switch unit is electrically connected to the signal input end of the solenoid valve, and is used to start the solenoid valve to work. Therefore, the solenoid valve control circuit can divide the driving signal sent by the driving unit through the voltage dividing circuit, so that the driving signal of the control switch unit is limited to a certain voltage range. The utility model can protect the solenoid valve from high voltage damage, so that users can reduce maintenance and the production line can produce normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 This is a system block diagram of an embodiment of a solenoid valve control circuit of the utility model;

[0018] Figure 2 for Figure 1 A specific circuit diagram of a solenoid valve control circuit.

[0019] Description of Figure Numbers:

[0020] name Label name Label Drive unit 1 Voltage divider unit 2 Switching unit 3 Transient Suppression Unit 4 First resistor R36 Second resistor R37 The third resistor R6 The fourth resistor R38 The first transistor Q2 The first PMOS tube Q3 diode D7

[0021] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] The utility model provides a solenoid valve control circuit.

[0026] In the embodiment of the utility model, the solenoid valve control circuit is as follows Figure 1 The device shown includes a driving unit 1, which is electrically connected to a voltage dividing unit 2 circuit for sending a driving signal;

[0027] A voltage dividing unit 2, the voltage dividing unit 2 is electrically connected to the switch unit 3 and is used to divide the voltage of the driving signal;

[0028] The switch unit 3 is electrically connected to the power supply end, and the switch unit 3 is electrically connected to the signal input end of the solenoid valve, and is used to start the solenoid valve to work.

[0029] The technical solution of the utility model can divide the driving signal sent by the driving unit 1 through the voltage dividing circuit by using the solenoid valve control circuit, so that the driving signal controlling the switch unit 3 is limited to a certain voltage range, thereby protecting the switch unit 3 of the solenoid valve from high voltage damage. The switch unit 3 can use power tubes such as PMOS tubes, NMOS tubes and thyristors. In the utility model, the circuit is specifically set to be a PMOS tube of AP2311GN. The voltage dividing unit 2 can use resistance voltage division, transformer voltage division, switch voltage division and other methods to divide the voltage. A plurality of resistance circuit branches are set to divide a high voltage into multiple low voltages, thereby achieving the purpose of voltage division. This technology can be used on high voltage power supplies. Transformer voltage division: The transformer is also a commonly used voltage division method. This method requires an electromagnetic transformer module, which can convert a high voltage power supply into a low voltage power supply, thereby achieving the purpose of voltage reduction. Switch voltage division: Switch voltage division is to use the conduction characteristics to decompose a power supply into multiple power supplies, thereby achieving the purpose of voltage division. This voltage division technology is simple and easy to operate, easy to operate, and highly reliable, and can achieve efficient results. In addition, capacitors can also be used for voltage division: capacitors can decompose a higher voltage power supply and reduce the voltage to an appropriate voltage level to meet the system voltage division requirements.

[0030] Preferably, the solenoid valve control circuit further includes:

[0031] A transient suppression unit, the transient suppression unit is electrically connected to the switch unit 3, and the transient suppression unit is electrically connected to the signal input end of the solenoid valve, and is used to protect the solenoid valve from being damaged by transient overvoltage.

[0032] In this embodiment, the transient suppression unit 4 is specifically configured as a SMAJ30A diode D7, so that the PS-level speed limits the excessive voltage to a safe range, thereby protecting the subsequent solenoid valve.

[0033] Preferably, the driving unit 1 includes a first resistor R36, a second resistor R37 and a first transistor Q2; the first end of the first resistor R36 is electrically connected to the signal output end of the main control circuit, the second end of the first resistor R36 is electrically connected to the first end of the second resistor R37 and the base of the first transistor Q2, respectively, the second end of the second resistor R37 and the emitter of the first transistor Q2 are grounded, and the collector of the first transistor Q2 is electrically connected to the voltage divider unit 2.

[0034] In this embodiment, the first resistor R36 and the second resistor R37 are configured to bias the base of the first transistor Q2 so that when an external controller sends a control signal, signal distortion will not occur, thereby driving the switch unit 3 to turn on; specifically, the first transistor Q2 is configured as a MMBT3904 transistor.

[0035] Preferably, the voltage dividing unit 2 includes a third resistor R6 and a fourth resistor R38; the first end of the third resistor R6 is electrically connected to the driving unit 1, the second end of the third resistor R6 is electrically connected to the first end of the fourth resistor R38 and the switching unit 3 respectively, and the second end of the fourth resistor R38 is electrically connected to the power supply end and the switching unit 3 and the power supply end.

[0036] In this embodiment, the third resistor R6 is specifically set to a resistor with a resistance value of 100K, and the fourth resistor R38 is specifically set to a resistor with a resistance value of 100K, so that the switch unit 3 can be stably turned on and turned on without being critically high, thereby reducing the damage rate and reducing the maintenance cost.

[0037] Preferably, the switch unit 3 includes a first PMOS tube Q3, a source of the first PMOS tube Q3 is electrically connected to the power supply end and the voltage divider unit 2 respectively, a gate of the first PMOS tube Q3 is electrically connected to the voltage divider unit 2, and a drain of the first PMOS tube Q3 is electrically connected to the transient suppression unit 4 and the signal input end of the solenoid valve.

[0038] In this embodiment, the switch unit 3 is specifically configured as a PMOS tube of AP2311GN, so that when the first PMOS tube Q3 is at a low level, the power supply end can supply power to drive the solenoid valve to work.

[0039] The utility model also provides a solenoid valve, which includes a solenoid valve control circuit. Since the solenoid valve adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0040] The technical solution of the utility model adopts a driving unit, the driving unit is electrically connected to the voltage dividing unit circuit, and is used to send a driving signal; a voltage dividing unit, the voltage dividing unit is electrically connected to the switch unit, and is used to divide the driving signal; the switch unit is electrically connected to the power supply end, and the switch unit is electrically connected to the signal input end of the solenoid valve, and is used to start the solenoid valve to work. Therefore, the solenoid valve control circuit can divide the driving signal sent by the driving unit through the voltage dividing circuit, so that the driving signal of the control switch unit is limited to a certain voltage range. The utility model can protect the solenoid valve from high voltage damage, so that users can reduce maintenance and the production line can produce normally.

[0041] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A solenoid valve control circuit, characterized in that: The solenoid valve control circuit comprises: A driving unit, the driving unit is electrically connected to the voltage dividing unit and is used to send a driving signal; A voltage dividing unit, the voltage dividing unit is electrically connected to the switch unit and is used to divide the voltage of the driving signal; A switch unit is electrically connected to the power supply end, and the switch unit is electrically connected to the signal input end of the solenoid valve, and is used to start the solenoid valve to work.

2. The solenoid valve control circuit according to claim 1, characterized in that: The solenoid valve control circuit also includes: A transient suppression unit is electrically connected to the switch unit and the transient suppression unit is electrically connected to the signal input end of the solenoid valve, and is used to protect the solenoid valve from transient overvoltage.

3. The solenoid valve control circuit according to claim 1, characterized in that: The driving unit includes a first resistor, a second resistor and a first transistor; the first end of the first resistor is electrically connected to the signal output end of the main control circuit, the second end of the first resistor is electrically connected to the first end of the second resistor and the base of the first transistor respectively, the second end of the second resistor and the emitter of the first transistor are grounded, and the collector of the first transistor is electrically connected to the voltage divider unit.

4. The solenoid valve control circuit according to claim 1, characterized in that: The voltage divider unit includes a third resistor and a fourth resistor; the first end of the third resistor is electrically connected to the driving unit, the second end of the third resistor is electrically connected to the first end of the fourth resistor and the switching unit respectively, and the second end of the fourth resistor is electrically connected to the power supply end, the switching unit and the power supply end.

5. The solenoid valve control circuit according to claim 2, characterized in that: The switch unit includes a first PMOS tube, a source of the first PMOS tube is electrically connected to the power supply end and the voltage divider unit respectively, a gate of the first PMOS tube is electrically connected to the voltage divider unit, and a drain of the first PMOS tube is electrically connected to the transient suppression unit and the signal input end of the solenoid valve.

6. The solenoid valve control circuit according to claim 2, characterized in that: The transient suppression unit is specifically configured as a SMAJ30A diode.

7. A solenoid valve, characterized in that: The solenoid valve comprises a solenoid valve control circuit according to any one of claims 1 to 6.

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