Electromagnetic valve driving circuit based on electromagnetic valve of concentrator

Abstract

The utility model provides a kind of solenoid valve drive circuit based on ore dressing machine solenoid valve, its coil positive terminal and negative terminal of solenoid valve are connected in series P-type switch tube and N-type switch tube, and third switch tube of high level conduction is connected in series between P-type switch tube to ground, and the control end of third switch tube is connected with the control end of N-type switch tube.When the control signal that is input in the control end of N-type switch tube is high level, each switch tube can be controlled to be all on, to turn on the coil loop of solenoid valve;When control signal is low level, each switch tube can be controlled to be all off, to disconnect the coil of solenoid valve and power supply.The solenoid valve drive circuit based on ore dressing machine solenoid valve of the utility model can disconnect the coil of solenoid valve and power supply under standby state, avoid solenoid valve under standby state to be electrified, improve safety.

Description

Technical Field

[0001] This utility model relates to the field of mineral processing machine technology, and in particular to a solenoid valve drive circuit based on a mineral processing machine solenoid valve. Background Technology

[0002] The mineral processing machine's actuator blows the ore away by spraying out high-pressure airflow. The high-pressure airflow is output in pulses, and pulse-type operation control is achieved through solenoid valves.

[0003] In existing technologies, NMOS (N-type metal-oxide-semiconductor) transistors are commonly used as control switches for solenoid valves. NMOS transistors have low on-resistance, fast switching speed, and can withstand large currents, easily meeting the current drive requirements of solenoid valves. The conduction condition of an NMOS transistor is that the gate voltage (G) is higher than the source voltage (S). At this time, current flows from the drain (D) to the source (S). In use, NMOS transistors are usually connected to the negative terminal of the solenoid valve.

[0004] Mineral processing machines often need to clean ores, making their working environment relatively humid. In standby mode, the NMOS switch is turned off, but the positive terminal of the solenoid valve is always connected to the power supply, which means that the solenoid valve is energized in standby mode, posing a significant safety risk in humid environments. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a solenoid valve drive circuit based on the solenoid valve of a mineral processing machine, so as to solve the problem that the solenoid valve control circuit in the prior art has a high safety risk in a humid environment.

[0006] This utility model provides a solenoid valve drive circuit based on a mineral processing machine solenoid valve, including:

[0007] A P-type switching transistor is connected in series between the positive terminal of the coil of the target solenoid valve and the positive terminal of the power supply. The control terminal of the P-type switching transistor is connected to the positive terminal of the power supply through a first resistor.

[0008] An N-type switching transistor is connected in series between the negative terminal of the target solenoid valve coil and ground.

[0009] The third switch is connected in series between the control terminal of the P-type switch and ground. The control terminal of the third switch is connected to the control terminal of the N-type switch. The third switch is a high-level conduction type switch.

[0010] Optionally, the third switching transistor is a bipolar transistor, and a second resistor is connected in series between the base of the bipolar transistor and the control terminal of the N-type switching transistor.

[0011] Optionally, a third resistor is connected in series between the output terminal of the N-type switch and ground.

[0012] Optionally, a fuse is connected in series between the input terminal of the N-type switching transistor and the negative terminal of the coil of the target solenoid valve.

[0013] Optionally, it also includes a light-emitting diode, which is connected in parallel with the fuse.

[0014] The solenoid valve drive circuit based on the solenoid valve of the ore dressing machine provided by this utility model has a P-type switch and an N-type switch connected in series at the positive and negative terminals of the solenoid valve coil, respectively. A third switch with high-level conduction is connected in series between the P-type switch and ground. The control terminal of the third switch is connected to the control terminal of the N-type switch. When the control signal input to the control terminal of the N-type switch is high, the third switch and the N-type switch are synchronously turned on. After the third switch is turned on, it can pull down the control terminal of the P-type switch to ground, turning on the P-type switch, thereby turning on the coil circuit of the solenoid valve. When the control signal is low, the third switch and the N-type switch are synchronously turned off. The control terminal of the P-type switch is pulled up to the power supply level through the first resistor, turning off the P-type switch. This disconnects the coil of the solenoid valve from the power supply, thereby preventing the solenoid valve from being energized in standby mode and improving safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the solenoid valve drive circuit based on the solenoid valve of the mineral processing machine in an embodiment of this utility model.

[0016] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0018] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] To address the problem that existing solenoid valve control circuits can cause the solenoid valve to become energized in standby mode, posing a significant safety risk in humid conditions, this invention provides a solenoid valve drive circuit based on a mineral processing machine's solenoid valve. A P-type switch and an N-type switch are connected in series at the positive and negative terminals of the solenoid valve coil, respectively. A third switch, which is high-level and conducts, is connected in series between the P-type switch and ground. The control terminal of the third switch is connected to the control terminal of the N-type switch. When the control signal input to the control terminal of the N-type switch is high, the third and N-type switches conduct synchronously. The conduction of the third switch pulls the control terminal of the P-type switch to ground, energizing the P-type switch and thus energizing the solenoid valve coil circuit. When the control signal is low, the third and N-type switches turn off synchronously. The control terminal of the P-type switch is pulled up to the power supply level through a first resistor, turning off the P-type switch and disconnecting the solenoid valve coil from the power supply. This prevents the solenoid valve from becoming energized in standby mode, improving safety.

[0021] Specifically, such as Figure 1 As shown, in the solenoid valve drive circuit based on the solenoid valve of the ore dressing machine in this embodiment, the P-type switch M1 is connected in series between the positive terminal of the coil of the solenoid valve 10 and the positive terminal of the power supply V+. The control terminal of the P-type switch is connected to the positive terminal of the power supply through the first resistor R1 so that when there is no other connection to the control terminal of the P-type switch M1, the control terminal of the P-type switch M1 is pulled up to the power supply level and the P-type switch M1 is set to the off state.

[0022] The N-type switch M2 is connected in series between the negative terminal of the coil of the solenoid valve M1 and ground. The source terminal of the N-type switch M2 is pulled low by the ground level, so that when the control signal connected to the control terminal of the N-type switch M2 is high, the N-type switch M2 can be turned on.

[0023] The third switch Q1 is connected in series between the control terminal of the P-type switch M1 and ground. The control terminal of the third switch Q1 is connected to the control terminal of the N-type switch M2. The third switch Q1 is a high-level conduction type switch.

[0024] When the control signal is high, the third switch Q1 can be turned on simultaneously. Then, the control terminal of the P-type switch M1 can be grounded through the third switch Q1, and the P-type switch M1 can be turned on, thereby turning on the coil energization circuit of the solenoid valve M1.

[0025] When the system is in standby mode, the control signal is low, which turns off the N-type switch M2 and the third switch Q1, disconnects the grounding circuit of the control terminal of the P-type switch M1, and restores the P-type switch M1 to the off state. This disconnects the solenoid valve M1 from the power supply, avoiding the safety risks caused by the solenoid valve M1 being energized, thereby improving the safety of the solenoid valve of the mineral processing machine in standby mode.

[0026] In this embodiment, the third switch Q1 is a transistor, and a second resistor R2 is connected in series between its base and the control terminal of the N-type switch M2 to simultaneously satisfy the conduction conditions of both the transistor and the N-type switch M2.

[0027] In an alternative embodiment, the third switch Q1 may be an NMOS switch, whose gate can be grounded through a resistor to release gate charge through grounding when turned off.

[0028] To avoid damage to the devices due to excessive operating current, in this embodiment, a third resistor R3 is connected in series between the output terminal of the N-type switch M2 and ground. This resistor can be used as a current-limiting resistor to reduce the impact of large currents and protect the solenoid valve and each switch.

[0029] To further enhance safety, in this embodiment, a fuse FU is connected in series between the input terminal of the N-type switch M2 and the negative terminal of the coil of the solenoid valve 10 for short-circuit protection.

[0030] To monitor the system status, this embodiment also includes a light-emitting diode D1, which is connected in parallel with the fuse FU. When the coil circuit of the solenoid valve 10 is turned on, the light-emitting diode D1 lights up as an indicator.

[0031] The solenoid valve drive circuit based on the solenoid valve of the ore dressing machine provided by this utility model has a P-type switch and an N-type switch connected in series at the positive and negative terminals of the solenoid valve coil, respectively. A third switch with high-level conduction is connected in series between the P-type switch and ground. The control terminal of the third switch is connected to the control terminal of the N-type switch. When the control signal input to the control terminal of the N-type switch is high, the third switch and the N-type switch are synchronously turned on. After the third switch is turned on, it can pull down the control terminal of the P-type switch to ground, turning on the P-type switch, thereby turning on the coil circuit of the solenoid valve. When the control signal is low, the third switch and the N-type switch are synchronously turned off. The control terminal of the P-type switch is pulled up to the power supply level through the first resistor, turning off the P-type switch. This disconnects the coil of the solenoid valve from the power supply, thereby preventing the solenoid valve from being energized in standby mode and improving safety.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The embodiments described above are merely illustrative of several specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model. Therefore, the scope of protection of this utility model patent should be determined by the appended claims.

Claims

1. A solenoid valve drive circuit based on a concentrator solenoid valve, characterized by, include: A P-type switching transistor is connected in series between the positive terminal of the coil of the target solenoid valve and the positive terminal of the power supply. The control terminal of the P-type switching transistor is connected to the positive terminal of the power supply through a first resistor. An N-type switching transistor is connected in series between the negative terminal of the coil of the target solenoid valve and ground. The third switch is connected in series between the control terminal of the P-type switch and ground. The control terminal of the third switch is connected to the control terminal of the N-type switch. The third switch is a high-level conduction type switch.

2. The solenoid valve drive circuit based on the solenoid valve of the ore dressing machine according to claim 1, characterized in that, The third switching transistor is a triode, and a second resistor is connected in series between the base of the triode and the control terminal of the N-type switching transistor.

3. The solenoid valve drive circuit based on the solenoid valve of the ore dressing machine according to claim 1, characterized in that, A third resistor is connected in series between the output terminal of the N-type switch and ground.

4. The solenoid valve drive circuit based on the solenoid valve of the ore dressing machine according to claim 1, characterized in that, A fuse is connected in series between the input terminal of the N-type switching transistor and the negative terminal of the coil of the target solenoid valve.

5. The solenoid valve drive circuit based on the solenoid valve of the ore dressing machine according to claim 4, characterized in that, It also includes a light-emitting diode, which is connected in parallel with the fuse.

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