CN203131169U - Quick vacuum electrically operated valve control unit - Google Patents
Quick vacuum electrically operated valve control unit Download PDFInfo
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- CN203131169U CN203131169U CN 201220728639 CN201220728639U CN203131169U CN 203131169 U CN203131169 U CN 203131169U CN 201220728639 CN201220728639 CN 201220728639 CN 201220728639 U CN201220728639 U CN 201220728639U CN 203131169 U CN203131169 U CN 203131169U
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- circuit
- comparator
- control unit
- signal synthesis
- valve control
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Abstract
The utility model belongs to a quick vacuum electrically operated valve control device, and particularly relates to a quick vacuum electrically operated valve control unit. According to the quick vacuum electrically operated valve control unit, a three-phase power supply is connected with a bidirectional triode thyristor, the bidirectional triode thyristor is connected with an electrically operated valve, the electrically operated valve is connected with a travel switch, the travel switch is connected with a signal synthesis circuit, and the signal synthesis circuit is connected with the bidirectional triode thyristor. An output end of the bidirectional triode thyristor is also respectively connected with a current-limiting resistor and a resistance-capacitance leakage circuit, an output end of the current-limiting resistor and an output end of the resistance-capacitance leakage circuit are connected with an alternating-current mutual inductor, the alternating-current mutual inductor is connected with an input end of a comparator A, the input end of the comparator A is also connected with a reference level generation circuit A, an output end of the comparator A is connected with a rectification filter circuit, an output end of the rectification filter circuit is connected with a comparator B, an input end of the comparator B is also connected with a reference level generation circuit B, one route of the comparators is outputted to the signal synthesis circuit, the other route of the comparators is outputted to an alternative denial gate and then outputted to the signal synthesis circuit, and an interlock circuit is connected with the signal synthesis circuit.
Description
Technical field
The utility model belongs to the fast vacuum electric valve control device, is specifically related to a kind of fast vacuum electric valve control unit.
Background technique
Main process system valve drives by valve power cabinet and realizes, valve power cabinet is that the basis establishment forms with the valve control unit, according to institute's control valve quantity difference, and the control unit of configuration varying number.Domestic existing valve control unit adopts the PLC technology more, realizes that valve state detects and start and stop drive, 2 valves of each valve control unit control.Mainly there are two shortcomings in existing valve control unit: during (1) valve control unit fault, can have influence on the control of 2 valves, the process safety operation risk is increased; (2) unit volume is bigger, and integrated degree is not high, and it is more to take up room during intensive layout.
Summary of the invention
The purpose of this utility model is to provide a kind of fast vacuum electric valve control unit, to overcome the prior art above shortcomings.
For achieving the above object, technical solution adopted in the utility model is:
A kind of fast vacuum electric valve control unit, this control unit comprise that three phase mains, bidirectional triode thyristor, position limit switch, signal synthesis circuit, current-limiting resistance, capacitance-resistance leadage circuit, D.C mutual-inductor, comparator A, reference level produce circuit A, current rectifying and wave filtering circuit, comparator B, reference level generation circuit B, interlock circuit, AND NOT gate; Described three phase mains is connected with bidirectional triode thyristor, and bidirectional triode thyristor is connected with electric valve, and electric valve is connected with position limit switch, and position limit switch is connected with signal synthesis circuit, and signal synthesis circuit is connected with bidirectional triode thyristor; The output terminal of bidirectional triode thyristor also is connected with the capacitance-resistance leadage circuit with current-limiting resistance respectively, the output terminal of current-limiting resistance and capacitance-resistance leadage circuit is connected with D.C mutual-inductor, D.C mutual-inductor is connected with comparator A input end, comparator A input end also produces circuit A with reference level and is connected, comparator A output terminal is connected with current rectifying and wave filtering circuit, rectification filter circuit output end is connected with comparator B, comparator B input end also produces circuit B with reference level and is connected, comparator one tunnel is exported to signal synthesis circuit, signal synthesis circuit is exported in another road output after AND NOT gate, interlock circuit is connected with signal synthesis circuit.
Described three phase mains is the 380V/220V ac power supply.
Described comparator A model is LM324N.
Described comparator Type B number is LM339AJ.
Described reference level produces circuit A, reference level produces circuit B and all produces the 5V level.
Described AND NOT gate model is 4023.
The obtained beneficial effect of the utility model is:
Fast vacuum electric valve control unit described in the utility model can be realized single valve detection control, and it is simple in structure, degree of modularity height, small and exquisite being easy to of volume arranged in the cabinet, the control protective function is perfect, and cost of production is lower, can satisfy the demand for control of fast vacuum mortor operated valve; Have simultaneously that valve switch is carried out in the DCS of acceptance order, simple logic is judged and chain, faut detection is reported to the police, function such as state indication on the spot, the easy-to-operat personnel understand the valve working state at any time.
Description of drawings
Fig. 1 is fast vacuum electric valve control unit structural drawing described in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
As shown in Figure 1, fast vacuum electric valve control unit described in the utility model comprises that three phase mains, bidirectional triode thyristor, position limit switch, signal synthesis circuit, current-limiting resistance, capacitance-resistance leadage circuit, D.C mutual-inductor, comparator A, reference level produce circuit A, current rectifying and wave filtering circuit, comparator B, reference level generation circuit B, interlock circuit, AND NOT gate; Described three phase mains is connected with bidirectional triode thyristor, and bidirectional triode thyristor is connected with electric valve, and electric valve is connected with position limit switch, and position limit switch is connected with signal synthesis circuit, and signal synthesis circuit is connected with bidirectional triode thyristor; The output terminal of bidirectional triode thyristor also is connected with the capacitance-resistance leadage circuit with current-limiting resistance respectively, the output terminal of current-limiting resistance and capacitance-resistance leadage circuit is connected with D.C mutual-inductor, D.C mutual-inductor is connected with comparator A input end, comparator A input end also produces circuit A with reference level and is connected, comparator A output terminal is connected with current rectifying and wave filtering circuit, rectification filter circuit output end is connected with comparator B, comparator B input end also produces circuit B with reference level and is connected, comparator one tunnel is exported to signal synthesis circuit, signal synthesis circuit is exported in another road output after AND NOT gate, interlock circuit is connected with signal synthesis circuit;
Described three phase mains is the 380V/220V ac power supply; Described comparator A model is LM324N; Described comparator Type B number is LM339AJ; Described reference level produces circuit A, reference level produces circuit B and all produces the 5V level; Described AND NOT gate model is 4023;
During work, three phase mains is exported to bidirectional triode thyristor, and the bidirectional triode thyristor original state is for turn-offing, and bidirectional triode thyristor carries out self check, when receiving default phase signal or breakdown signal, carries out malfunction alarm, and trouble signal is shown; Otherwise bidirectional triode thyristor leaves valve, closes valve or forbids that the valve event order carries out conducting or break-make according to what receive, and then the unlatching of control electric valve, closes or stop action; Position limit switch is with the unlatching of electric valve or close the signal that whether puts in place and feed back to bidirectional triode thyristor by signal synthesizer, opens or closes when putting in place when electric valve, and bidirectional triode thyristor turn-offs; The output signal of bidirectional triode thyristor also carries out that current limliting is handled and the capacitance-resistance leadage circuit carries out the residual voltage processing of releasing through current-limiting resistance respectively, avoid producing high pressure and damage bidirectional triode thyristor and valve driving machine, be lower than 1mA by current-limiting resistance post-sampling circuital current, signal after the processing carries out step-down by D.C mutual-inductor to be handled, three-phase 380V/220VAC is transformed to about 15VAC, the signal that obtains is input to comparator A, reference level produces circuit A generation 5V level and is input to comparator A, be higher than then comparator A output high level of 5V, be lower than then comparator A output low level of 5V; Be input to comparator B after the signal of comparator A output advances over commutation eliminator rectifying and wave-filtering, reference level produces circuit B generation 5V level and is input to comparator B, is higher than then comparator B output high level of 5V, is lower than then comparator B output low level of 5V; The sampling square signal of comparator B output is divided into two-way, and one tunnel breakdown signal feeds back to bidirectional triode thyristor by signal synthesis circuit, and another road feeds back to bidirectional triode thyristor through the synthetic default phase signal of AND NOT gate by signal synthesis circuit.
Claims (6)
1. fast vacuum electric valve control unit is characterized in that: this control unit comprises that three phase mains, bidirectional triode thyristor, position limit switch, signal synthesis circuit, current-limiting resistance, capacitance-resistance leadage circuit, D.C mutual-inductor, comparator A, reference level produce circuit A, current rectifying and wave filtering circuit, comparator B, reference level and produce circuit B, interlock circuit, AND NOT gate; Described three phase mains is connected with bidirectional triode thyristor, and bidirectional triode thyristor is connected with electric valve, and electric valve is connected with position limit switch, and position limit switch is connected with signal synthesis circuit, and signal synthesis circuit is connected with bidirectional triode thyristor; The output terminal of bidirectional triode thyristor also is connected with the capacitance-resistance leadage circuit with current-limiting resistance respectively, the output terminal of current-limiting resistance and capacitance-resistance leadage circuit is connected with D.C mutual-inductor, D.C mutual-inductor is connected with comparator A input end, comparator A input end also produces circuit A with reference level and is connected, comparator A output terminal is connected with current rectifying and wave filtering circuit, rectification filter circuit output end is connected with comparator B, comparator B input end also produces circuit B with reference level and is connected, comparator one tunnel is exported to signal synthesis circuit, signal synthesis circuit is exported in another road output after AND NOT gate, interlock circuit is connected with signal synthesis circuit.
2. fast vacuum electric valve control unit according to claim 1, it is characterized in that: described three phase mains is the 380V/220V ac power supply.
3. fast vacuum electric valve control unit according to claim 1, it is characterized in that: described comparator A model is LM324N.
4. fast vacuum electric valve control unit according to claim 1 is characterized in that: described comparator Type B number is LM339AJ.
5. fast vacuum electric valve control unit according to claim 1 is characterized in that: described reference level produces circuit A, reference level produces circuit B and all produces the 5V level.
6. fast vacuum electric valve control unit according to claim 1, it is characterized in that: described AND NOT gate model is 4023.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220728639 CN203131169U (en) | 2012-12-26 | 2012-12-26 | Quick vacuum electrically operated valve control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220728639 CN203131169U (en) | 2012-12-26 | 2012-12-26 | Quick vacuum electrically operated valve control unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203131169U true CN203131169U (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220728639 Expired - Lifetime CN203131169U (en) | 2012-12-26 | 2012-12-26 | Quick vacuum electrically operated valve control unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203131169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797224A (en) * | 2020-12-30 | 2021-05-14 | 四川红华实业有限公司 | Method for recovering self-checking working state of VAT electric regulating valve |
-
2012
- 2012-12-26 CN CN 201220728639 patent/CN203131169U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797224A (en) * | 2020-12-30 | 2021-05-14 | 四川红华实业有限公司 | Method for recovering self-checking working state of VAT electric regulating valve |
| CN112797224B (en) * | 2020-12-30 | 2023-01-24 | 四川红华实业有限公司 | Method for recovering self-checking working state of VAT electric regulating valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |
|
| CX01 | Expiry of patent term |