CN203362479U - Electric contact pressure gauge control circuit - Google Patents
Electric contact pressure gauge control circuit Download PDFInfo
- Publication number
- CN203362479U CN203362479U CN 201320410489 CN201320410489U CN203362479U CN 203362479 U CN203362479 U CN 203362479U CN 201320410489 CN201320410489 CN 201320410489 CN 201320410489 U CN201320410489 U CN 201320410489U CN 203362479 U CN203362479 U CN 203362479U
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- triode
- resistance
- pressure gauge
- electric contact
- optoelectronic isolator
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Abstract
The utility model relate to an electric contact pressure gauge control circuit. An electric contact pressure gauge is used in cooperation with electric devices (like a relay and a frequency converter), and the defects of the control mode lie in that a whole control circuit set is electromagnetically disturbed through relay control, reliability and measuring accuracy of a control system are affected and safety is lower. The electric contact pressure gauge control circuit comprises an electric contact pressure gauge and a solid relay. The electric contact pressure gauge comprises a high-voltage end, a low-voltage end and a pressure switch. The electric contact pressure gauge control circuit is characterized by further comprising an optoelectronic isolator LQ1, an optoelectronic isolator LQ2, a diode D1, a diode D2, a capacitor C1, a triode Q1, a triode Q2 and a triode Q3, the high-voltage end is connected with the negative electrode of the input end of the optoelectronic isolator LQ1, and the low-voltage end is connected with the negative electrode of the input end of the optoelectronic isolator LQ2. A relay is not used in the control circuit, safety voltage range can be set, and the control circuit is safe, reliable and small in energy consumption.
Description
Technical field
The utility model patent relates to the instrument field, specifically a kind of pressure gauge with electric contact control circuit.
Background technique
Pressure gauge with electric contact is widely used in the industrial departments such as oil, chemical industry, metallurgy, electric power, machinery or the supporting middle measurement of the electromechanical equipment various fluid medium pressures without explosion risk.Usually, pressure gauge with electric contact, through supporting the use with corresponding electric device (as relay and frequency variator etc.), can be realized the purpose of automatically controlling and posting a letter to controlled pressure system.Pressure gauge with electric contact at present commonly used is used contactor and Control, pressure gauge with electric contact intermediate contact and lower bound contacting when ambient pressure reduces, arrive main contactor through normally-closed contact, the coil of main contactor obtains electric adhesive, then normally opened contact is connected, make main contactor form self-hold circuit (at this moment leaving because of pressure rise pressure gauge with electric contact intermediate contact and lower bound contact), the main contact supply pump work that switches on power; When pressure rise arrives setting pressure, pressure gauge with electric contact intermediate contact and high limit contacting, arrive relay coil through auxiliary contact, the relay adhesive, and normally-closed contact disconnection main contactor releasing winding, main contact disconnects and stopping to the pump work power supply.
The shortcoming of this kind of method is to use Control to carry out electromagnetic interference to a whole set of control circuit, affects reliability and the measurement accuracy of control system, and power consumption and noise are larger simultaneously, and Safety performance is also lower.
The model utility content
Technical problem to be solved in the utility model is to provide and a kind ofly can overcomes existing control circuit and due to Control, whole circuit is caused the pressure gauge with electric contact control circuit of electromagnetic interference.
For solving the problems of the technologies described above, the technological scheme that the utility model adopts is: a kind of pressure gauge with electric contact control circuit, comprise pressure gauge with electric contact and solid-state relay, described pressure gauge with electric contact comprises high voltage terminal, low voltage terminal and pressure switch, its specialization is: described control circuit comprises optoelectronic isolator LQ1, optoelectronic isolator LQ2, diode D1, diode D2, capacitor C 1, triode Q1, triode Q2 and triode Q3, described high voltage terminal is connected with the input cathode of optoelectronic isolator LQ1, the input anode of optoelectronic isolator LQ1 is connected with resistance R 9, the collector electrode of optoelectronic isolator LQ1 output terminal is connected with the base stage of triode Q1 with resistance R 1 respectively by node 2, described low voltage terminal is connected with optoelectronic isolator LQ2 input cathode, the input anode contact resistance R8 of optoelectronic isolator LQ2, and the collector electrode of optoelectronic isolator LQ2 output terminal is connected with the base stage of triode Q2 with resistance R 2 respectively by node 1, described resistance R 8 and resistance R 9 parallel connections, optoelectronic isolator LQ1 all is connected with pressure switch with the emitter of optoelectronic isolator LQ2 output terminal, the collector electrode of described triode Q2 is respectively by resistance R 1 and resistance R 3 access node 2 and VCC, and the emitter of triode Q2 meets GND by resistance R 7 and diode D2, the collector electrode of described triode Q1 is by resistance R 2 and resistance R 4 difference access node 2 and VCC, the emitter of triode Q2 meets GND by resistance R 6 and diode D1, the emitter of triode Q1 is by the base stage of resistance R 5 access triode Q3, the collector electrode access solid-state relay of triode Q3, its grounded-emitter connection, series capacitance C1 between VCC and GND.
The direct current VCC of this circuit is 10V-36V.
Compared with prior art, the beneficial effects of the utility model are:
1. control circuit of the present utility model does not use relay, and this circuit only needs 10V-36V direct current situations vacant voltage, and common safety voltage scope, lower than 36V, therefore can be set the safety voltage scope, safe and reliable during use;
Therefore 2. this control circuit does not use relay, and power consumption is few, substantially do not disturb, and noise free, and the pressure system that can be widely used in gas, liquid is controlled.
The accompanying drawing explanation
Describe the utility model in detail below in conjunction with drawings and embodiments:
Fig. 1 is structural representation of the present utility model.
In figure: 1. high voltage terminal, 2. low voltage terminal, 3. pressure switch, 4. solid-state relay, 5. pump.
Embodiment
As shown in Figure 1, a kind of pressure gauge with electric contact control circuit, comprise pressure gauge with electric contact and solid-state relay 4, pressure gauge with electric contact comprises high voltage terminal 1, low voltage terminal 2 and pressure switch 3, solid-state relay 4 is connected with VCC, control circuit comprises optoelectronic isolator LQ1, optoelectronic isolator LQ2, diode D1, diode D2, capacitor C 1, triode Q1, triode Q2 and triode Q3, high voltage terminal 1 is connected with the input cathode of optoelectronic isolator LQ1, the input anode of optoelectronic isolator LQ1 is connected with resistance R 9, optoelectronic isolator LQ1 output terminal is by node 2 contact resistance R1, optoelectronic isolator LQ1 output terminal is connected with pressure gauge with electric contact, low voltage terminal 2 is connected with optoelectronic isolator LQ2 input cathode, the input anode contact resistance R8 of optoelectronic isolator LQ2, described resistance R 9 and 8 parallel connections of described resistance R, optoelectronic isolator LQ2 output terminal is connected with resistance R 2 by node 1, and optoelectronic isolator LQ2 output terminal is connected with pressure gauge with electric contact, the collector electrode of described triode Q2 is by resistance R 1 and resistance R 3 difference access node 2 and VCC, and the emitter of triode Q2 is by resistance R 7 and diode D2 ground connection, and the base stage of triode Q2 is connected with node 1, the collector electrode of described triode Q1 is by resistance R 2 and resistance R 4 difference access node 2 and VCC, the emitter of triode Q2 is by resistance R 6 and diode D1 ground connection, the emitter of described triode Q2 is by the base stage of resistance R 5 access triode Q3, the collector electrode access solid-state relay 4 of triode Q3, the grounded-emitter connection of triode Q3, branch road series capacitance C1 between VCC and GND.
Working principle of the present utility model is: generally, the pressure switch 3 of pressure gauge with electric contact keeps UNICOM with low voltage terminal 2, and electric current flows into from the VCC end, via resistance R 8, then passes through optoelectronic isolator LQ2, then through low voltage terminal 2, gets back to GND.In this process, optoelectronic isolator LQ2 triggers, lower voltage after node 1 place is communicated with, resistance R 1 place's voltage raises, electric current, by resistance R 3, resistance R 1, node 2, triode Q1, triode Q3 and diode D1, is opened solid-state relay 4 and pump 5, and it is started working.Work along with pump 5, ambient pressure increases gradually, pressure switch 3 swings to high voltage terminal 1 gradually, setting value when ambient pressure arrival pressure gauge with electric contact, pressure switch 3 is communicated with high voltage terminal 1, electric current flows into via resistance R 9 from the VCC end, optoelectronic isolator LQ1 triggers, lower voltage after node 2 tunnels are communicated with, right side optoelectronic isolator LQ2 disconnects, and resistance R 2 place's voltages raise, and pump 5 quits work, electric current is got back to GND through R2, node 1, optoelectronic isolator Q2, resistance R 7, diode D2, and triode Q1 and triode Q3 enter cut-off state.When system pressure descends, pressure switch 3 swings to low voltage terminal 2 gradually, and when the setting value of ambient pressure arrival pressure gauge with electric contact, pressure switch 3 is communicated with low voltage terminal 2, and circulation, realize the control of pressure gauge with electric contact and so forth, thereby realizes the control to pump 5.
The utility model relates to a kind of pressure gauge with electric contact control circuit.Pressure gauge with electric contact is through supporting the use with electric device (as relay and frequency variator etc.), the shortcoming of this kind of control is to use Control to carry out electromagnetic interference to a whole set of control circuit, affect reliability and the measurement accuracy of control system, Safety performance is also lower.A kind of pressure gauge with electric contact control circuit, comprise pressure gauge with electric contact and solid-state relay, pressure gauge with electric contact comprises high voltage terminal, low voltage terminal and pressure switch, it is characterized in that: this control circuit also comprises optoelectronic isolator LQ1, optoelectronic isolator LQ2, diode D1, diode D2, capacitor C 1, triode Q1, triode Q2 and triode Q3, high voltage terminal is connected with the input cathode of optoelectronic isolator LQ1, and low voltage terminal is connected with optoelectronic isolator LQ2 input cathode.Control circuit of the present utility model does not use relay, can set the safety voltage scope, safe and reliable, and power consumption is few.
Claims (2)
1. a pressure gauge with electric contact control circuit, comprise pressure gauge with electric contact and solid-state relay (4), described pressure gauge with electric contact comprises high voltage terminal (1), low voltage terminal (2) and pressure switch (3), it is characterized in that: described control circuit comprises optoelectronic isolator LQ1, optoelectronic isolator LQ2, diode D1, diode D2, capacitor C 1, triode Q1, triode Q2 and triode Q3, described high voltage terminal (1) is connected with the input cathode of optoelectronic isolator LQ1, the input anode of optoelectronic isolator LQ1 is connected with resistance R 9, the collector electrode of optoelectronic isolator LQ1 output terminal is connected with the base stage of triode Q1 with resistance R 1 respectively by node 2, described low voltage terminal (2) is connected with optoelectronic isolator LQ2 input cathode, the input anode contact resistance R8 of optoelectronic isolator LQ2, and the collector electrode of optoelectronic isolator LQ2 output terminal is connected with the base stage of triode Q2 with resistance R 2 respectively by node 1, described resistance R 8 and resistance R 9 parallel connections, the emitter of optoelectronic isolator LQ1 and optoelectronic isolator LQ2 output terminal all is connected with pressure switch (3), the collector electrode of described triode Q2 is respectively by resistance R 1 and resistance R 3 access node 2 and VCC, and the emitter of triode Q2 meets GND by resistance R 7 and diode D2, the collector electrode of described triode Q1 is by resistance R 2 and resistance R 4 difference access node 2 and VCC, the emitter of triode Q2 meets GND by resistance R 6 and diode D1, the emitter of triode Q1 is by the base stage of resistance R 5 access triode Q3, the collector electrode access solid-state relay (4) of triode Q3, its grounded-emitter connection, series capacitance C1 between VCC and GND.
2. a kind of pressure gauge with electric contact control circuit according to claim 1, it is characterized in that: the direct current VCC of this circuit is 10V-36V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320410489 CN203362479U (en) | 2013-07-11 | 2013-07-11 | Electric contact pressure gauge control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320410489 CN203362479U (en) | 2013-07-11 | 2013-07-11 | Electric contact pressure gauge control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203362479U true CN203362479U (en) | 2013-12-25 |
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ID=49810258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320410489 Withdrawn - After Issue CN203362479U (en) | 2013-07-11 | 2013-07-11 | Electric contact pressure gauge control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203362479U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334912B (en) * | 2013-07-11 | 2015-08-05 | 西安工业大学 | Pressure gauge with electric contact control circuit |
-
2013
- 2013-07-11 CN CN 201320410489 patent/CN203362479U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334912B (en) * | 2013-07-11 | 2015-08-05 | 西安工业大学 | Pressure gauge with electric contact control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20150805 |
|
| RGAV | Abandon patent right to avoid regrant |