Vacuum pressure switch control circuit and vacuum pressure switch

Abstract

The utility model relates to the technical field of industrial control, and particularly provides a vacuum pressure switch control circuit and a vacuum pressure switch, the vacuum pressure switch control circuit comprises a main loop, a load, a supply valve and a breaking valve; the main loop is provided with a VD end, an OUT1 signal end, an OUT2 signal end, an OUT3 signal end and a GND end; a triode Q1 is arranged between the OUT2 signal end of the main loop and the load, a triode Q2 is arranged between the triode Q1 of the main loop and the supply valve, and a switch S1 is arranged between the OUT3 signal end of the main loop and the breaking valve; the vacuum pressure switch comprises a vacuum pressure switch control circuit; according to the utility model, the load, the supply valve and the breaking valve are matched in the vacuum pressure switch circuit, and three paths of control signals are adopted in the main loop to respectively control the operation of the load, the supply valve and the breaking valve, so that the intelligent energy-saving control is realized, and the industrial control effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial control, in particular to a vacuum pressure switch control circuit and a vacuum pressure switch. Background Art

[0002] Vacuum digital pressure switches are commonly used in industrial automation systems, primarily to monitor and control pressure changes within vacuum systems. They monitor system pressure in real time and trigger corresponding actions, such as opening or closing a circuit, when pressure exceeds or falls below a set threshold, thereby controlling the system's operation. Furthermore, vacuum digital pressure switches can help detect and prevent leaks in vacuum systems, issuing an alarm signal when system pressure exceeds a set threshold, alerting operators to a potential leak.

[0003] The vacuum pressure switch used in traditional technology only directly outputs the control signal through the load function and does not have the vacuum adjustment function. When the vacuum pressure switch control circuit is working, it will continue to consume air even after reaching the set vacuum pressure, which leads to a large air consumption. At the same time, if the applied pressure fluctuates greatly, the traditional vacuum pressure switch control circuit may vibrate. These processes will cause more heat and noise to be generated, resulting in a waste of electricity and poor overall control effect. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a vacuum pressure switch control circuit and a vacuum pressure switch, which are used to solve the problem that the vacuum pressure switch used in the prior art does not have a vacuum regulation function.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a vacuum pressure switch control circuit, including a main circuit, a load, a supply valve, and a destruction valve; the main circuit is provided with a VD terminal, an OUT1 signal terminal, an OUT2 signal terminal, an OUT3 signal terminal, and a GND terminal;

[0006] A transistor Q1 is provided between the OUT2 signal terminal of the main circuit and the load, the base of the transistor Q1 is connected to the OUT1 signal terminal of the main circuit, the collector is connected to the load, and the emitter is connected to the GND terminal of the main circuit. The main circuit controls the operation of the load by outputting the OUT1 signal to the load through the transistor Q1;

[0007] A transistor Q2 is provided between the transistor Q1 of the main circuit and the supply valve. The base of the transistor Q2 is connected to the OUT2 signal terminal of the main circuit, the collector is connected to the supply valve, and the emitter is connected to the GND terminal of the main circuit. The main circuit outputs the OUT2 signal to the supply valve through the transistor Q2 to control the operation of the supply valve.

[0008] A switch S1 is arranged between the OUT3 signal terminal of the main circuit and the breaking valve, and the operation of the breaking valve is controlled through the switch S1.

[0009] In an embodiment of the utility model, the collector and the emitter of the triode Q1 are connected in parallel with a stabilizing diode D1, and the collector and the emitter of the triode Q2 are connected in parallel with a stabilizing diode D2.

[0010] In an embodiment of the utility model, the vacuum pressure switch control circuit further comprises a power supply DC, the VD terminal of the main circuit, the positive electrode of the supply valve, the positive electrode of the breaking valve and the load are all connected to the positive electrode of the power supply DC, and the GND terminal of the main circuit is connected to the negative electrode of the power supply DC.

[0011] In an embodiment of the utility model, a unidirectional conducting diode D6 is connected in series between the positive electrode of the power supply DC and the VD terminal of the main circuit.

[0012] In an embodiment of the utility model, a light emitting diode D3 is connected in series on the collector of the triode Q1, and a light emitting diode D4 is connected in series on the collector of the triode Q2.

[0013] In an embodiment of the utility model, a light emitting diode D5 is connected in series on the negative electrode of the breaking valve.

[0014] In an embodiment of the utility model, the negative electrode of the breaking valve is further connected to the negative electrode of the power supply DC, and a switch S2 is arranged between the negative electrode of the breaking valve and the negative electrode of the power supply DC.

[0015] In an embodiment of the utility model, the triode Q1 and the triode Q2 are both NPN type triodes

[0016] A vacuum pressure switch comprises the vacuum pressure switch control circuit.

[0017] As described above, the vacuum pressure switch control circuit and the vacuum pressure switch of the utility model have the following beneficial effects:

[0018] The utility model discloses a load, supply valve, destruction valve cooperation in vacuum pressure switch circuit, and in main circuit adopts three -way control signal to control the operation of load, supply valve, destruction valve respectively, make this vacuum pressure switch possess energy -conserving function, and the gas supply signal of vacuum generator can be switched according to the automatic change of vacuum pressure ON / OFF state, realize intelligent energy -conserving control, improve industrial control effect, the utility model discloses still design two switch control mode on the control of destruction valve, when S1 closes, through main circuit output control signal, to satisfy the vacuum release demand when vacuum system uses, when vacuum pump stops working, S2 closes, and destruction valve can still keep the operating state, to satisfy the vacuum release demand when vacuum system is deactivated, effectively prevent gas reverse flow back in vacuum pump, avoid causing the phenomenon of back suction. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 The circuit schematic diagram of the vacuum pressure switch control circuit disclosed in Example 1 is shown.

[0020] Fig. 2 The external structure schematic diagram of the vacuum pressure switch disclosed in Example 2 is shown.

[0021] Element number explanation

[0022] Main circuit 1; load 2; supply valve 3; destruction valve 4; main body 5; vacuum port 51; suction filter 6. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the utility model by specific examples, and those skilled in the art can easily understand other advantages and effects of the utility model from the disclosed content of the specification.

[0024] Please refer to Figs. 1-2 It should be understood that the structure, proportion, size, etc. shown in the drawings attached to the specification are only used to understand and read the disclosed content by those skilled in the art, and do not limit the implementation conditions of the utility model, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes of the utility model, should still fall within the scope of the disclosed technology.

[0025] Example 1, please refer to Fig. 1, this embodiment provides a vacuum pressure switch control circuit, including a main circuit 1, a load 2, a supply valve 3, and a destruction valve 4; the main circuit 1 plays a main control role, and the load 2 acts as a switch to achieve precise control of the circuit; the main circuit 1 is provided with a VD terminal, an OUT1 signal terminal, an OUT2 signal terminal, an OUT3 signal terminal, and a GND terminal; a transistor Q1 is provided between the OUT2 signal terminal of the main circuit 1 and the load 2, the base of the transistor Q1 is connected to the OUT1 signal terminal of the main circuit 1, the collector is connected to the load 2, and the emitter is connected to the GND terminal of the main circuit 1, and the main circuit 1 controls the operation of the load 2 by outputting the OUT1 signal to the load 2 through the transistor Q1; a transistor Q2 is provided between the transistor Q1 of the main circuit 1 and the supply valve 3, the base of the transistor Q2 is connected to the OUT2 signal terminal of the main circuit 1, the collector is connected to the supply valve 3, and the emitter is connected to the GND terminal of the main circuit 1. The emitter is connected to the GND terminal of the main circuit 1, and the main circuit 1 outputs the OUT2 signal to the supply valve 3 through the transistor Q2 to control the operation of the supply valve 3; the transistor Q1 and the transistor Q2 are both NPN transistors; a switch S1 is provided between the OUT3 signal terminal of the main circuit 1 and the destruction valve 4, and the operation of the destruction valve 4 is controlled by the switch S1; the setting of the supply valve 3 can provide the necessary pressure for the vacuum system. In the vacuum system, the supply valve 3 ensures that the system can reach the required vacuum degree. When the pressure in the system is lower than the set value, the supply valve 3 will automatically open to replenish gas to the system, thereby maintaining the normal working state of the system; the setting of the destruction valve 4 can prevent the system from overpressure and avoid back suction. When the pressure in the system exceeds the set value, the destruction valve 4 will automatically open to release excess gas to prevent the system from overpressure, thereby protecting the system from damage.

[0026] A Zener diode D1 is connected in parallel between the collector and emitter of transistor Q1, and a Zener diode D2 is connected in parallel between the collector and emitter of transistor Q2. In transistor circuit design, the core purpose of the parallel diode between the collector and emitter is to significantly improve the operating stability and performance of the transistor. First, the parallel diode can effectively stabilize the output bias voltage, ensuring that the transistor maintains stable electrical characteristics under complex operating conditions. Second, the parallel diode can accelerate the response speed of the transistor, making it more sensitive and rapid to changes in the input signal. Therefore, the design of Zener diodes D1 and D2 plays an indispensable role in improving the overall performance and stability of the circuit.

[0027] The vacuum pressure switch control circuit also includes a power supply DC. The VD end of the main circuit 1, the positive electrode of the supply valve 3, the positive electrode of the destruction valve 4 and the load 2 are all connected to the positive electrode of the power supply DC, and a unidirectional conducting diode D6 is connected in series between the positive electrode of the power supply DC and the VD end of the main circuit 1 to prevent reverse current; the GND end of the main circuit 1 is connected to the negative electrode of the power supply DC, and the power supply DC is used to power the vacuum pressure switch control circuit.

[0028] The negative electrode of the destruction valve 4 is also connected to the negative electrode of the power supply DC, and a switch S2 is arranged between the negative electrode of the destruction valve 4 and the negative electrode of the power supply DC; when the vacuum pump stops working, that is, the main circuit 1 stops outputting the control signal, the switch S2 is closed to make the destruction valve 4 still keep the running state, effectively preventing the gas from flowing back to the vacuum pump in the reverse direction and avoiding the reverse suction phenomenon.

[0029] The utility model discloses still design two switch control mode on the control of destruction valve 4, when S1 closes, through main circuit output control signal, satisfy the vacuum release demand when the vacuum system uses, when the vacuum pump stops working, S2 closes, and destruction valve 4 still can keep the running state, to satisfy the vacuum release demand when the vacuum system stops using.

[0030] The light emitting diode D3 is connected in series at the collector of the triode Q1, which can directly show the running state of the load; the light emitting diode D4 is connected in series at the collector of the triode Q2, which can directly show the running state of the supply valve 3; the light emitting diode D5 is connected in series at the negative electrode of the destruction valve 4, which can directly show the running state of the destruction valve 4.

[0031] Embodiment 2, please refer to Fig. 2 The vacuum pressure switch comprises a main body 5, one side of the main body 5 is provided with a vacuum port 51, and a suction filter 6 is arranged in the main body 5 and used for filtering air entering from the vacuum port 51; the light emitting diode D3, the light emitting diode D4 and the light emitting diode D5 are all arranged on one side of the upper end of the main body 5.

[0032] In summary, the load 2, the supply valve 3 and the destruction valve 4 are matched in the vacuum pressure switch circuit, and three control signals are used in the main circuit 1 to control the running of the load 2, the supply valve 3 and the destruction valve 4, so that the vacuum pressure switch has the energy-saving function, the air supply signal of the vacuum generator can be automatically switched between the ON state and the OFF state according to the vacuum pressure change, the intelligent energy-saving control is realized, and the industrial control effect is improved. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0033] The above embodiments only exemplarily illustrate the principle and effects of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A vacuum pressure switch control circuit, characterized in that: It includes a main circuit, a load, a supply valve, and a destruction valve; the main circuit is provided with a VD terminal, an OUT1 signal terminal, an OUT2 signal terminal, an OUT3 signal terminal, and a GND terminal; A transistor Q1 is provided between the OUT2 signal terminal of the main circuit and the load, the base of the transistor Q1 is connected to the OUT1 signal terminal of the main circuit, the collector is connected to the load, and the emitter is connected to the GND terminal of the main circuit. The main circuit controls the operation of the load by outputting the OUT1 signal to the load through the transistor Q1; A transistor Q2 is provided between the transistor Q1 of the main circuit and the supply valve. The base of the transistor Q2 is connected to the OUT2 signal terminal of the main circuit, the collector is connected to the supply valve, and the emitter is connected to the GND terminal of the main circuit. The main circuit outputs the OUT2 signal to the supply valve through the transistor Q2 to control the operation of the supply valve. A switch S1 is provided between the OUT3 signal terminal of the main circuit and the destruction valve, and the operation of the destruction valve is controlled by the switch S1.

2. The vacuum pressure switch control circuit according to claim 1, characterized in that: A voltage stabilizing diode D1 is connected in parallel between the collector and emitter of the transistor Q1 , and a voltage stabilizing diode D2 is connected in parallel between the collector and emitter of the transistor Q2 .

3. The vacuum pressure switch control circuit according to claim 1, characterized in that: The vacuum pressure switch control circuit also includes a power supply DC. The VD end of the main circuit, the positive electrode of the supply valve, the positive electrode of the destruction valve and the load are all connected to the positive electrode of the power supply DC, and the GND end of the main circuit is connected to the negative electrode of the power supply DC.

4. The vacuum pressure switch control circuit according to claim 3, characterized in that: A unidirectional conducting diode D6 is connected in series between the positive electrode of the power supply DC and the VD terminal of the main circuit.

5. The vacuum pressure switch control circuit according to claim 1, characterized in that: The collector of the transistor Q1 is connected in series with a light emitting diode D3, and the collector of the transistor Q2 is connected in series with a light emitting diode D4.

6. The vacuum pressure switch control circuit according to claim 5, characterized in that: A light emitting diode D5 is connected in series to the cathode of the destruction valve.

7. The vacuum pressure switch control circuit according to claim 3, characterized in that: The negative electrode of the destruction valve is also connected to the negative electrode of the power supply DC, and a switch S2 is provided between the negative electrode of the destruction valve and the negative electrode of the power supply DC.

8. The vacuum pressure switch control circuit according to claim 1, characterized in that: The transistor Q1 and the transistor Q2 are both NPN transistors 9. A vacuum pressure switch, characterized in that: The vacuum pressure switch control circuit comprises the vacuum pressure switch control circuit according to any one of claims 1 to 8.

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