CN209860660U - Unit starting control device - Google Patents
Unit starting control device Download PDFInfo
- Publication number
- CN209860660U CN209860660U CN201920621985.8U CN201920621985U CN209860660U CN 209860660 U CN209860660 U CN 209860660U CN 201920621985 U CN201920621985 U CN 201920621985U CN 209860660 U CN209860660 U CN 209860660U
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- contactor
- frequency converter
- autotransformer
- output end
- input end
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Abstract
The utility model provides a unit start control device, the device includes: the device comprises a frequency converter, a first contactor, an autotransformer and a second contactor; the output end of the frequency converter is connected with the input end of the first contactor; the normally closed contact of the first contactor is connected in series in a control loop of the autotransformer; the input end of the autotransformer is connected with the output end of the second contactor; the normally closed contact of the second contactor is connected in series in a control loop of the frequency converter; so, first contactor and second contactor can realize the interlocking, break down when the converter, when unable in time restoreing, can be through autotransformer starter motor, and cooperation flow control valve adjusts gas flow, ensures that the unit can normal operating, and then has guaranteed production efficiency.
Description
Technical Field
The utility model relates to a unit control technical field especially relates to a unit start control device.
Background
In a gas pressurization base station, a motor unit started by a frequency converter control is generally used for regulating the flow rate of gas.
However, in actual production, because the frequency converter has a high failure rate, once the frequency converter fails, the repair cycle is long, so that the unit cannot run, the reliability of the unit is reduced, and further the production efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the embodiment of the utility model provides a unit start control device for when the converter breaks down among the solution prior art, the unable normal operating of frequency converter unit leads to the technical problem that production efficiency reduces.
An embodiment of the utility model provides a unit start control device, the device includes: the device comprises a frequency converter, a first contactor, an autotransformer and a second contactor;
the output end of the frequency converter is connected with the input end of the first contactor;
the normally closed contact of the first contactor is connected in series in a control loop of the autotransformer;
the input end of the autotransformer is connected with the output end of the second contactor;
and the normally closed contact of the second contactor is connected in series in a control loop of the frequency converter.
In the above scheme, the output end of the autotransformer is connected with the output end of the first contactor through a cable.
In the above scheme, the power phase sequence of the frequency converter is consistent with the power phase sequence of the autotransformer.
In the above scheme, the apparatus further comprises: the switch board, the switch board counter is provided with the combined floodgate button of first contactor, the separating brake button of first contactor, the status indicator lamp of first contactor, the combined floodgate button of second contactor, the separating brake button of second contactor, the status indicator lamp of second contactor.
In the above scheme, the apparatus further comprises: a first circuit breaker, a first control transformer;
the output end of the first circuit breaker is connected with the input end of the first control transformer;
and the output end of the first control transformer is connected with the input end of the frequency converter.
In the above scheme, the apparatus further comprises: a second control transformer;
the second control transformer is connected between the output end of the frequency converter and the input end of the first contactor.
In the above scheme, the apparatus further comprises: and the output end of the second circuit breaker is connected with the input end of the second contactor.
In the above scheme, the apparatus further comprises: a power source;
the first output end of the power supply is connected with the input end of the first circuit breaker.
In the above scheme, the second output end of the power supply is connected with the input end of the second circuit breaker.
The utility model provides a unit start control device, the device includes: the device comprises a frequency converter, a first contactor, an autotransformer and a second contactor; the output end of the frequency converter is connected with the input end of the first contactor; the normally closed contact of the first contactor is connected in series in a control loop of the autotransformer; the input end of the autotransformer is connected with the output end of the second contactor; the normally closed contact of the second contactor is connected in series in a control loop of the frequency converter; so, first contactor and second contactor can realize the interlocking, break down when the converter, when unable in time restoreing, can be through autotransformer starter motor, and cooperation flow control valve adjusts gas flow, ensures that the unit can normal operating, and then has guaranteed production efficiency.
Drawings
Fig. 1 is an overall structure schematic diagram of the unit start control device provided by the embodiment of the present invention.
Description of reference numerals:
1-a frequency converter; KM 1-first contactor; 2-autotransformer; 3-a power supply; KM 2-second contactor.
Detailed Description
In order to solve when the converter breaks down among the prior art, the unable normal operating of frequency converter unit leads to the technical problem that production efficiency reduces, the utility model provides a unit start control device, the device includes: the device comprises a frequency converter, a first contactor, an autotransformer and a second contactor; the output end of the frequency converter is connected with the input end of the first contactor; the normally closed contact of the first contactor is connected in series in a control loop of the autotransformer; the input end of the autotransformer is connected with the output end of the frequency converter; and the normally closed contact of the second contactor is connected in series in a control loop of the frequency converter.
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.
The present embodiment provides a unit start control apparatus, as shown in fig. 1, the apparatus including: the device comprises a frequency converter 1, a first contactor KM1, an autotransformer 2 and a second contactor KM 2;
the output end of the frequency converter 1 is connected with the input end of the first contactor KM 1; the input end of the autotransformer 2 is connected with the output end of the second contactor KM 2; the output of the first contactor KM1 was connected to the motor M1 via a cable, and the output of the autotransformer 2 was connected to the output of the first contactor KM1 via a cable, so that the frequency converter 1 and the autotransformer 2 were connected in parallel.
Here, since the rotation direction of the motor M1 is fixed, the power phase sequence of the frequency converter 1 and the power phase sequence of the autotransformer 2 should be kept identical.
For the interlock, the normally closed contact of the first contactor KM1 is connected in series in the control loop of the autotransformer 2; the normally closed contact of the second contactor KM2 is connected in series in the control loop of the frequency converter 1. Thus, when the first contactor KM1 is attracted, the second contactor KM2 is not attracted; similarly, when the second contactor KM2 is closed, the first contactor KM1 cannot be closed, so that only one option is provided for supplying power to the motor M1.
With continued reference to fig. 1, the apparatus further comprises: a first circuit breaker QF1, a first control transformer TC1, a second control transformer TC2, a second circuit breaker QF2 and a power supply 3; wherein the content of the first and second substances,
the output terminal of the first breaker QF1 is connected to the input terminal of a first control transformer TC1, and the output terminal of the first control transformer TC1 is connected to the input terminal of the frequency converter 1.
A first output of the power supply 3 is connected to an input of a first breaker QF 1. Wherein, the power supply 3 is a dual-path power supply which respectively supplies power for the frequency converter 1 and the autotransformer 2, and therefore, the second output end of the power supply 3 is connected with the input end of the second breaker QF 2. An output terminal of the second breaker QF2 is connected to an input terminal of the second contactor KM 2.
Here, the second control transformer TC2 is connected between the output terminal of the frequency converter 1 and the input terminal of the first contactor KM1, specifically:
the output end of the frequency converter 1 is connected with the input end of a second control transformer TC2, and the output end of the second control transformer TC2 is connected with the input end of a first contactor KM 1.
As an alternative embodiment, the apparatus may further comprise: the control cabinet can be provided with a closing button of the first contactor KM1, an opening button of the first contactor KM1, a state indicator lamp of the first contactor KM1, a closing button of the second contactor KM2, an opening button of the second contactor KM2 and a state indicator lamp of the second contactor KM2 on the cabinet surface.
Here, the connection manner of the closing button of the first contactor KM1, the opening button of the first contactor KM1, the status indicator lamp of the first contactor KM1, the closing button of the second contactor KM2, the opening button of the second contactor KM2 and the status indicator lamp of the second contactor KM2 is a conventional connection manner, and is not described herein again.
The embodiment of the utility model provides a beneficial effect that unit start control device can bring is at least:
this embodiment provides a unit start control device, and the device includes: the device comprises a frequency converter, a first contactor, an autotransformer and a second contactor; the output end of the frequency converter is connected with the input end of the first contactor; the normally closed contact of the first contactor is connected in series in the control loop of the autotransformer; the input end of the autotransformer is connected with the output end of the second contactor; the normally closed contact of the second contactor is connected in series in a control loop of the frequency converter; so, first contactor and second contactor can realize the interlocking, break down when the converter, when unable in time restoreing, can be through autotransformer starter motor, and cooperation flow control valve adjusts gas flow, ensures that the unit can normal operating, and then has guaranteed production efficiency.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A unit start control device, characterized in that the device comprises: the device comprises a frequency converter, a first contactor, an autotransformer and a second contactor;
the output end of the frequency converter is connected with the input end of the first contactor;
the normally closed contact of the first contactor is connected in series in a control loop of the autotransformer;
the input end of the autotransformer is connected with the output end of the second contactor;
and the normally closed contact of the second contactor is connected in series in a control loop of the frequency converter.
2. The apparatus of claim 1 wherein the output of the autotransformer is connected to the output of the first contactor by a cable.
3. The apparatus of claim 1 wherein the power phase sequence of the frequency converter coincides with the power phase sequence of the autotransformer.
4. The apparatus of claim 1, wherein the apparatus further comprises: the switch board, the switch board counter is provided with the combined floodgate button of first contactor, the separating brake button of first contactor, the status indicator lamp of first contactor, the combined floodgate button of second contactor, the separating brake button of second contactor, the status indicator lamp of second contactor.
5. The apparatus of claim 1, wherein the apparatus further comprises: a first circuit breaker, a first control transformer;
the output end of the first circuit breaker is connected with the input end of the first control transformer;
and the output end of the first control transformer is connected with the input end of the frequency converter.
6. The apparatus of claim 1, wherein the apparatus further comprises: a second control transformer;
the second control transformer is connected between the output end of the frequency converter and the input end of the first contactor.
7. The apparatus of claim 1, wherein the apparatus further comprises: and the output end of the second circuit breaker is connected with the input end of the second contactor.
8. The apparatus of claim 5, wherein the apparatus further comprises: a power source;
the first output end of the power supply is connected with the input end of the first circuit breaker.
9. The apparatus of claim 8, wherein the second output of the power source is connected to an input of a second circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920621985.8U CN209860660U (en) | 2019-04-30 | 2019-04-30 | Unit starting control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920621985.8U CN209860660U (en) | 2019-04-30 | 2019-04-30 | Unit starting control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209860660U true CN209860660U (en) | 2019-12-27 |
Family
ID=68940054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920621985.8U Active CN209860660U (en) | 2019-04-30 | 2019-04-30 | Unit starting control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209860660U (en) |
-
2019
- 2019-04-30 CN CN201920621985.8U patent/CN209860660U/en active Active
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