CN213953842U - Air compressor machine high pressure switch control circuit - Google Patents
Air compressor machine high pressure switch control circuit Download PDFInfo
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- CN213953842U CN213953842U CN202022748254.5U CN202022748254U CN213953842U CN 213953842 U CN213953842 U CN 213953842U CN 202022748254 U CN202022748254 U CN 202022748254U CN 213953842 U CN213953842 U CN 213953842U
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Abstract
The utility model provides an air compressor machine high pressure switch control circuit, including the power, the power both ends parallel connection has combined floodgate return circuit, combined floodgate relay action return circuit, separating brake return circuit, fuse fusing extension return circuit, power monitoring return circuit, switch to close position extension return circuit, is connected with DCS distributed control system on the air compressor machine high pressure switch control circuit, and it has switch to close position normally open auxiliary node QF1, switch to close position extension relay KA3 to concatenate on the switch to close position extension return circuit; and a self-holding loop is also arranged on the action loop of the closing relay, and a KA1 (4, 12) normally-open auxiliary node and a KA3 (4, 12) normally-open node are connected in series on the self-holding loop. The utility model discloses can guarantee air compressor machine high tension switchgear's safety and stability, avoid because of the switch mistake closes dangerous incident such as casualties, equipment damage that causes, ensured unit safe operation, avoid the unit to lose because of the air supply and cause pneumatic valve action to cause the accident shutdown.
Description
Technical Field
The utility model relates to an electrical equipment technical field, concretely relates to air compressor machine high-voltage switch control circuit.
Background
The air compressor belongs to an auxiliary mechanical device in a power plant, provides power for the control of various pneumatic valves, provides an air source for plasma ignition and the like, and is of great importance to the reliability and stability of a high-voltage switch control loop of the air compressor. In the production process of a power plant, a motor of an air compressor is frequently started, an electric maintaining F + C switch is generally adopted, and an electric maintaining control loop is shown in figure 1:
the premise is that: the fuse of the high-voltage switch of the air compressor is intact, and the switch is in a brake-off state at a test position;
the air compressor F + C switch is switched on by actuating a switching-on relay KA1 to actuate a switching-on coil HQ, so that the air compressor F + C switch is switched on. When a closing instruction of a remote DCS distributed control system of an air compressor F + C switch is sent, after a normally closed node of a tripping relay BCJ (3, 11) and a normally closed auxiliary node of a fuse fusing expansion relay SWJ (25, 35), a closing relay KA1 is electrified to act, a normally open node of KA1 (3, 11) in a closing loop is closed, a normally closed node of the fuse fusing expansion relay SWJ (6, 18) and a normally closed node of a test position (27, 49) are switched to connect a closing coil HQ, at the moment, the closing coil HQ is electrified, and the switch is closed. On the action loop of the closing relay, a normally open node of KA1 (4, 12) is connected in series in the self-holding loop, when the closing relay KA1 acts, the normally open node of the self-holding loop KA1 (4, 12) is closed, and the closing relay KA1 is powered on all the time; and a closing coil HQ is excited, and the switch is closed.
Tripping: when an opening instruction of a remote DCS distributed control system for an F + C switch of an air compressor is sent, a tripping relay BCJ is electrified to act after an air compressor high-voltage switch is switched on QF (3, 13), a normally closed node of the tripping relay BCJ (3, 11) acts in a closing relay action loop and becomes an opening point, a closing relay action loop is disconnected, a closing relay KA1 loses electricity, and the closing relay KA1 loses electricity, so that a normally open node of the closing relay KA1 (3, 11) in the closing loop acts, and a closing coil HQ loses electricity and an air compressor switch trips.
The inventor finds that the existing circuit has at least the following problems in the process of implementing the utility model:
when the switch is in a switching-on state, the action loop of the switching-on relay has a self-holding function, when the switching-on relay KA1 is electrified, the self-holding loop is switched on, the switching-on relay KA1 always acts, and when the switch is shaken in and out, the action loop of the switching-on relay is always self-held due to the self-holding function of the switching-on loop in a normal working state. Supposing that the air compressor high-voltage switch is shaken to working positions (27, 10) from test positions (27, 49), when the switch is shaken to the working positions from the test positions, the air compressor high-voltage switch is not at the test positions nor at the working positions at the moment, auxiliary nodes of the test positions and the working positions in a closing circuit of the air compressor high-voltage switch are all changed into opening points, a closing coil HQ is powered off, and because the air compressor high-voltage switch is a power maintaining switch, when the closing coil HQ is powered off, the high-voltage switch is disconnected; when the high-voltage switch of the air compressor is swung to the working position, the closing loop is switched on again, the high-voltage switch is automatically closed, and the major potential safety hazard of operation exists.
Disclosure of Invention
In order to solve the potential safety hazard that exists among the current circuit, the utility model provides an air compressor machine high tension switchgear control circuit to solve air compressor machine high tension switchgear, the problem of automatic combined floodgate appears when on off state position conversion, makes the return circuit perfect more, and the switch operation is more reliable safety.
The invention conception is as follows: the key point of the problem is that the self-holding loop can automatically distinguish the switch from the open state, and the self-holding loop is disconnected.
Therefore, the technical scheme of the utility model is that: the utility model provides an air compressor machine high pressure switch control circuit, includes the power, and power both ends parallel connection has combined floodgate return circuit, combined floodgate relay action return circuit, separating brake return circuit, fuse fusing extension return circuit, power monitoring loop, is connected with DCS distributed control system on the air compressor machine high pressure switch control circuit, wherein: still be equipped with the self-sustaining return circuit on the closing relay action return circuit, it has KA1 (4, 12) to connect in series and normally opens auxiliary node on the self-sustaining return circuit, its characterized in that:
a switch on-position extension loop is further arranged between the positive electrode and the negative electrode of the power supply, and a switch on-position normally-open auxiliary node QF1 and a switch on-position extension relay KA3 are connected to the switch on-position extension loop in series;
and a KA3 (4, 12) normally open node and a KA3 (4, 12) normally open node are also serially connected to a circuit of one end of the KA1 (4, 12) normally open auxiliary node far away from the positive electrode of the power supply on the self-holding loop.
Preferably, the power supply is 110V direct current, circuit breakers MCB are arranged on common ends of a positive pole and a negative pole of the power supply, and when the control circuit is grounded or a relay is short-circuited and burnt out, the circuit breakers can be automatically disconnected to protect the control circuit.
Has the advantages that: the utility model discloses an add switch closing position extension return circuit, increase KA3 (4, 12) normally open node at the self-sustaining return circuit at power both ends for air compressor machine high tension switchgear under the separating brake state, KA3 (4, 12) normally open node disconnection self-sustaining return circuit, combined floodgate relay KA1 loses the electricity. When the switch is switched on, the switching-on relay KA1 is electrified, the switching-on position node is closed, and the self-holding loop is switched on; when the high-voltage switch of the air compressor is switched off, the switch-on normally-open auxiliary node QF1 is disconnected, the KA3 relay loses power, the KA3 (4, 12) normally-open node is disconnected, the self-holding loop is disconnected, and the switch-on relay KA1 loses power and is disconnected.
Compared with the prior art, the utility model discloses can guarantee air compressor machine high tension switchgear's safety and stability, avoid because of the switch mistake closes dangerous incident such as casualties, equipment damage that cause, ensured unit safe operation, avoid the unit to lose because of the air supply and cause pneumatic valve action to cause the accident to shut down.
Drawings
Fig. 1 is a circuit diagram of a prior art switch in an open, test bit state.
Fig. 2 is a circuit diagram of the present invention in the state of the switch opening and the test position.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, but the embodiment should not be construed as limiting the present invention.
The existing air compressor high-voltage switch control circuit is shown in figure 1:
the utility model provides an air compressor machine high tension switchgear control circuit, includes the power, and power both ends parallel connection has combined floodgate return circuit, combined floodgate relay action return circuit, separating brake return circuit, fuse fusing extension return circuit, power monitoring loop, is connected with DCS distributed control system on the air compressor machine high tension switchgear control circuit, and air compressor machine high tension switchgear's distant place separating brake and combined floodgate all control through DCS distributed control system, wherein:
a test position and a working position which are connected in parallel are arranged on the closing loop, and a closing coil HQ, a SWJ (6, 18) normally closed auxiliary node and a KA1 (3, 11) normally open auxiliary node are sequentially connected in series on a circuit from the access end of the test position and the working position to the positive electrode of the power supply;
a tripping relay BCJ, a contactor on-position QF, an on-site control switch KK for on-site brake separation and a remote/on-site conversion switch CK for on-site are sequentially connected in series from the negative end to the positive end of the power supply on the brake separation loop; an emergency trip circuit is also connected to the opening circuit, one end of the emergency trip circuit is connected with the positive end of the power supply, the other end of the emergency trip circuit is connected to a circuit between the on-position QF of the contactor and the opening of the local control switch KK, and an accident trip button SA of the motor is connected to the emergency trip circuit in series;
a closing relay KA1, an SWJ (25, 35) normally closed auxiliary node, a BCJ (3, 11) normally closed node, a QF switch test position and a local control switch KK closing are sequentially connected in series on a closing relay action loop from a power supply negative electrode end to a positive electrode end, and one end, close to the power supply positive electrode, of the local control switch KK closing is connected to a circuit between a local control switch KK opening and a remote/local conversion switch CK local position; the switching-on relay action loop is also connected with a self-holding loop, one end of the self-holding loop is connected with the positive end of a power supply, the other end of the self-holding loop is connected with a circuit between a BCJ (3, 11) normally-closed node and a QF switch test position, and a KA1 (4, 12) normally-open auxiliary node is connected in series with the self-holding loop;
a fuse fusing extension relay SWJ and a switch body fuse fusing position S1 (24, 34) are sequentially connected in series from the negative end to the positive end of the power supply on the fuse fusing extension loop;
a power supply monitoring device JJ is connected in series on the operation power supply monitoring loop; .
The utility model discloses as shown in figure 2:
on the basis of the prior art, the utility model is additionally provided with a switch on-position extension circuit between the anode and the cathode of the power supply, and a switch on-position normally-open auxiliary node QF1 and a switch on-position extension relay KA3 are connected on the switch on-position extension circuit in series;
and a KA3 (4, 12) normally open node is also serially arranged on the self-holding loop, and a KA3 (4, 12) normally open node is arranged on a circuit at one end of the KA1 (4, 12) normally open auxiliary node far away from the positive electrode of the power supply.
The power supply is 110V direct current, and the positive pole of power, negative pole end all are equipped with miniature circuit breaker MCB, and when control circuit ground connection or there is the relay to take place the short circuit and burn out, this circuit breaker will automatic disconnection, protection control circuit.
The utility model discloses a theory of operation:
the air compressor high-voltage switch is switched on by exciting a switching-on coil HQ through the action of a switching-on relay KA 1. After a switch-on instruction of the remote DCS distributed control system is sent, the fuse fuses the normally-closed auxiliary node of the expansion relay SWJ (25, 35) through the normally-closed node of the tripping relay BCJ (3, 11), and then the switch-on relay KA1 is powered on to act. Because the action of closing relay KA1 makes KA1 (3, 11) normally open node closed in the closing return circuit, the air compressor machine high-voltage switch fuse is intact this moment, and fuse extension relay SWJ does not move, and the switch is at experimental position, and closing coil HQ is electrified this moment, and air compressor machine high-voltage switch closes a floodgate. In a closing relay action loop, a normally open node of KA1 (4, 12) on a self-holding loop is changed from open to closed; the high-voltage switch of the air compressor is changed from opening to closing, at the moment, the switch on-position normally-open auxiliary node QF1 is closed, the KA3 switch on-position expansion relay is electrified to act, the KA3 normally-open node connected in series on the self-holding loop is driven to be closed, the self-holding loop is connected, and the closing relay KA1 is electrified all the time. And (4) exciting a closing coil HQ, and keeping the high-voltage switch of the air compressor in an electrically closing state at the moment.
When the switch acts on the switching-on relay KA1, the air compressor high-voltage switch is supposed to swing from a test position to a working position, when the switch swings from the test position to the working position, the air compressor high-voltage switch is not at the test position or at the working position, the auxiliary nodes of the test position and the working position in a switching-on loop of the air compressor high-voltage switch are all changed into switching-on points, a switching-on coil HQ is in power loss, and the air compressor high-voltage switch is an electric maintaining switch, and when the switching-on coil HQ is in power loss, the high-voltage switch is switched off; when the high-voltage switch of the air compressor is in a brake-off state, the switch-on normally-open auxiliary node QF1 is disconnected, the KA3 relay loses power, the KA3 (4, 12) normally-open node is disconnected, the self-holding loop is disconnected, and the switch-on relay KA1 loses power and is disconnected. Therefore, the switch can not be switched on automatically no matter the switch is switched between a test position and a working position by the switching-on relay KA1, and personal safety and equipment safety are guaranteed.
The specific functions of the components and the techniques known in the art are not described in detail in the present specification.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (2)
1. The utility model provides an air compressor machine high pressure switch control circuit, includes the power, and power both ends parallel connection has combined floodgate return circuit, combined floodgate relay action return circuit, separating brake return circuit, fuse fusing extension return circuit, power monitoring loop, is connected with DCS distributed control system on the air compressor machine high pressure switch control circuit, wherein: still be equipped with the self-sustaining return circuit on the closing relay action return circuit, it has KA1 to normally open auxiliary node, its characterized in that to concatenate on the self-sustaining return circuit:
a switch on-position extension loop is further arranged between the positive electrode and the negative electrode of the power supply, and a switch on-position normally-open auxiliary node QF1 and a switch on-position extension relay KA3 are connected to the switch on-position extension loop in series;
and a KA3 normally open node is further arranged on the self-holding loop in series, and a KA3 normally open node is arranged on a circuit at one end of the KA1 normally open auxiliary node far away from the positive electrode of the power supply.
2. The air compressor high-voltage switch control circuit of claim 1, wherein: the power supply is 110V direct current, and circuit breakers MCB are arranged on the common ends of the positive pole and the negative pole of the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022748254.5U CN213953842U (en) | 2020-11-25 | 2020-11-25 | Air compressor machine high pressure switch control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022748254.5U CN213953842U (en) | 2020-11-25 | 2020-11-25 | Air compressor machine high pressure switch control circuit |
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| CN213953842U true CN213953842U (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022748254.5U Active CN213953842U (en) | 2020-11-25 | 2020-11-25 | Air compressor machine high pressure switch control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114115109A (en) * | 2021-11-26 | 2022-03-01 | 华能烟台八角热电有限公司 | Screw air compressor control system for power plant |
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2020
- 2020-11-25 CN CN202022748254.5U patent/CN213953842U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114115109A (en) * | 2021-11-26 | 2022-03-01 | 华能烟台八角热电有限公司 | Screw air compressor control system for power plant |
| CN114115109B (en) * | 2021-11-26 | 2024-03-19 | 华能烟台八角热电有限公司 | Screw air compressor control system for power plant |
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