A circuit for detecting reliable operation of DCS contacts

Abstract

The present invention relates to a DCS detection device, and in particular to a circuit for detecting the reliable operation of a DCS contact. It includes a high-voltage electrical appliance control circuit and a low-voltage electrical appliance control circuit. The high-voltage electrical appliance control circuit includes a high-voltage control power supply, a circuit breaker 1, a device power supply terminal, a field operation column closing, a circuit breaker opening, a field operation column opening, and a DCS interlocking stop switch; the low-voltage electrical appliance control circuit includes a low-voltage control power supply, a circuit breaker 2, and a control circuit, and is characterized in that: the high-voltage electrical appliance control circuit also includes a start-up permission extension, an interlocking stop signal extension, a reset circuit, an interlocking stop signal indicator light HR11, and a start-up permission signal indicator light HY11; the low-voltage electrical appliance control circuit also includes a DCS stop indicator light HG. A circuit designed by the present invention for detecting the reliable operation of a DCS contact, combined with the circuit for detecting the reliable operation of a DCS contact, can effectively avoid a long delay in inspection time due to failure to start the machine and can clearly determine the cause of the shutdown.

Description

Technical Field

[0001] The invention relates to a DCS detection device, in particular to a circuit for detecting the reliable operation of a DCS contact. Background Art

[0002] In the electrical control circuit, whether it is a 10KV high-voltage circuit or a 400V low-voltage circuit, there are sometimes multiple auxiliary contacts of the DCS, which play the role of allowing start instructions, stop instructions and operation instructions. Sometimes there will be abnormal startup or unexplained shutdown, and the switch status of the circuit cannot be determined, and the shutdown inspection will be delayed for a long time. Summary of the invention

[0003] In order to solve the problem of DCS contact detection mentioned in the background technology, the present invention shows a circuit for detecting the reliable operation of DCS contacts.

[0004] In order to achieve the above purpose, the following technical solutions are provided:

[0005] A circuit for detecting the reliable operation of a DCS contact comprises a high-voltage electrical appliance control circuit and a low-voltage electrical appliance control circuit, wherein the high-voltage electrical appliance control circuit comprises a high-voltage control power supply, a circuit breaker 1, a device power supply terminal, a field operation column closing circuit, a circuit breaker opening circuit, a field operation column opening circuit and a DCS interlocking stop switch; the low-voltage electrical appliance control circuit comprises a low-voltage control power supply, a circuit breaker 2 and a control circuit, wherein the high-voltage electrical appliance control circuit further comprises a start-up permission extension, an interlocking stop signal extension, a reset circuit, an interlocking stop signal indicator light HR11 and a start-up permission signal indicator light HY11; the low-voltage electrical appliance control circuit further comprises a DCS stop indicator light HG.

[0006] The power-on permission extension includes the control coil KA4 and the normally open auxiliary contact KA_4 of the intermediate relay four, and the DCS power-on permission contact F1, wherein one end of the conversion switch QK is connected to the positive power line of the high-voltage control power supply, the other end of the conversion switch QK is connected to one end of the DCS power-on permission contact F1, the other end of the DCS power-on permission contact F1 is connected to one end of the control coil KA4, and the other end of the control coil KA4 is connected to the negative power line of the high-voltage control power supply, and the power-on permission signal indicator HY11 and the normally open auxiliary contact KA_4 are connected in series between the positive power line and the negative power line of the high-voltage control power supply.

[0007] The interlocking stop signal extension includes a DCS stop button F2 and a control coil KA1 of an intermediate relay, wherein the DCS stop button F2 and the control coil KA1 of the intermediate relay are connected in series to the positive terminal of the high-voltage control power supply.

[0008] The reset circuit includes a reset button SR, wherein the reset button SR, the normally open auxiliary contact KA_1 of the intermediate relay one, and the control coil KA2 of the intermediate relay two are connected in series between the positive power line and the negative power line of the high-voltage control power supply in sequence, the normally open auxiliary contact KA_1 is connected in parallel with the normally open auxiliary contact KA_2 of the intermediate relay two, and the interlocking shutdown signal indicator light HR11 is connected in parallel with the control coil KA2 of the intermediate relay two.

[0009] A DCS stop switch F3 and a DCS stop indicator light HG are connected in series between the live wire and the neutral wire of the low-voltage control power supply in the low-voltage electrical appliance control circuit.

[0010] Furthermore, the electrical components corresponding to the circuit for detecting the reliable operation of the DCS contacts are arranged in the electrical control circuit box.

[0011] Beneficial effects of the present invention:

[0012] 1. The present invention relates to a circuit for detecting the reliable operation of a DCS contact. In a high-voltage circuit, an on-site operator can observe the start-up permission signal indicator HY11 to know whether the equipment has the conditions for starting up. If the start-up permission signal indicator HY11 is not on, it proves that the DCS start-up permission contact F1 is not closed and the start-up is not allowed.

[0013] 2. A circuit for detecting the reliable operation of DCS contacts designed by the present invention, in the high-voltage circuit, after the DCS stop button F2 is actuated, the control coil KA1 is actuated, and the normally open auxiliary contact KA_1 in the reset circuit is closed, so that the control coil KA2 is energized, the normally open auxiliary contact KA_2 is closed and self-locked, and the interlock stop signal indicator HR11 is lit. After confirming that the DCS stop button F2 contact is actuated, the reset button SR is pressed to de-energize the intermediate relay KA2 in the reset circuit, and the interlock stop signal indicator HR11 is extinguished. Whether the DCS stop button F2 has completed the action is judged by the state of the interlock stop signal indicator HR11.

[0014] 3. The present invention designs a circuit for detecting the reliable operation of DCS contacts. A DCS stop indicator light HG is added at line number 103 after the DCS stop contact switch F3 in the low-voltage electrical appliance control circuit. When the DCS stop contact F3 is closed, the DCS stop indicator light HG lights up, proving that the DCS stop contact switch F3 signal is normal. If the DCS stop indicator light HG is not on, it proves that the DCS stop contact switch F3 is not closed, and the motor cannot be started.

[0015] 4. The circuit designed by the present invention for detecting the reliable operation of the DCS contacts, combined with the loop for detecting the reliable operation of the DCS contacts, can effectively avoid a long delay in inspection time due to failure to start the machine and can clearly determine the cause of the shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A circuit diagram of a high-voltage electrical appliance control circuit for detecting a circuit for reliable operation of a DCS contact;

[0017] Figure 2 A circuit diagram of a low-voltage electrical appliance control circuit for detecting the reliable operation of a DCS contact;

[0018] Figure 3 The present invention is a three-dimensional structural diagram of an electrical control circuit box where a circuit for detecting the reliable operation of DCS contacts is located.

[0019] Among them: 1. High-voltage control power supply; 2. Circuit breaker one; 3. Device power supply terminal; 4. Allow start-up extension; 5. On-site operation column closing; 6. Opening circuit; 7. On-site operation column opening; 8. DCS interlocking stop switch; 9. Interlocking stop signal extension; 10. Reset circuit; 11. Interlocking stop signal indicator HR11; 12. Allow start-up signal indicator HY11; 13. Low-voltage control power supply; 14. Circuit breaker two; 15. Control circuit; 16. DCS stop indicator HG; 17. Electrical control circuit box; 171. Open and close door. DETAILED DESCRIPTION

[0020] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0021] like Figure 1-3 As shown, a circuit for detecting the reliable operation of DCS contacts includes a high-voltage electrical appliance control circuit and a low-voltage electrical appliance control circuit. The high-voltage electrical appliance control circuit includes a high-voltage control power supply 1, a circuit breaker 1 2, a device power supply terminal 3, a field operation column closing switch 5, a switch-off circuit 6, a field operation column switch-off switch 7 and a DCS interlocking stop switch 8; the low-voltage electrical appliance control circuit includes a low-voltage control power supply 13, a circuit breaker 2 14 and a control circuit 15, and the high-voltage electrical appliance control circuit also includes a start-up permission extension 4, an interlocking stop signal extension 9, a reset circuit 10, an interlocking stop signal indicator light HR11 and a start-up permission signal indicator light HY11; the low-voltage electrical appliance control circuit also includes a DCS stop indicator light HG.

[0022] The high-voltage electrical control circuit is 10KV, and the power-on extension includes the control coil KA4 and the normally open auxiliary contact KA_4 of the intermediate relay 4, and the DCS power-on contact F1, wherein one end of the conversion switch QK is connected to the positive power line of the high-voltage control power supply, and the other end of the conversion switch QK is connected to one end of the DCS power-on contact F1, and the other end of the DCS power-on contact F1 is connected to one end of the control coil KA4, and the other end of the control coil KA4 is connected to the negative power line of the high-voltage control power supply. The power-on signal indicator HY11 and the normally open auxiliary contact KA_4 are connected in series between the positive power line and the negative power line of the high-voltage control power supply. The on-site operator can know whether the equipment has the conditions for powering on by observing the power-on signal indicator HY11. If the power-on signal indicator HY11 is not on, it proves that the DCS power-on contact F1 is not closed and power-on is not allowed.

[0023] The interlocking stop signal extension 9 includes a DCS stop button F2 and a control coil KA1 of an intermediate relay 1, wherein the DCS stop button F2 and the control coil KA1 of the intermediate relay 1 are connected in series between the positive power line and the negative power line of the high-voltage control power supply; the reset circuit includes a reset button SR, wherein the reset button SR, the normally open auxiliary contact KA_1 of the intermediate relay 1, and the control coil KA2 of the intermediate relay 2 are connected in series between the positive power line and the negative power line of the high-voltage control power supply in sequence, the normally open auxiliary contact KA_1 is connected in parallel with the normally open auxiliary contact KA_2 of the intermediate relay 2, and the interlocking stop signal indicator HR11 is connected in parallel with the control coil KA2 of the intermediate relay 2. A DCS stop indicator HG is added at line number 103 after the DCS stop contact switch F3. When the DCS stop contact F3 is closed, the DCS stop indicator HG is on, proving that the DCS stop contact switch F3 signal is normal. If the DCS stop indicator HG is not on, it proves that the DCS stop contact switch F3 is not closed, and the motor cannot be started.

[0024] The low-voltage electrical appliance control circuit is 400V, and a DCS stop contact switch F3 and a DCS stop indicator light HG are connected in series between the live wire and the neutral wire of the low-voltage control power supply in the low-voltage electrical appliance control circuit. A DCS stop indicator light HG is added at line number 103 after the DCS stop contact switch F3 in the low-voltage electrical appliance control circuit. When the DCS stop contact F3 is closed, the DCS stop indicator light HG lights up, indicating that the DCS stop contact switch F3 signal is normal. If the DCS stop indicator light HG is not on, it means that the DCS stop contact switch F3 is not closed, and the motor cannot be started.

[0025] The corresponding components in the 10KV high-voltage electrical appliance control circuit and the 400V low-voltage electrical appliance control circuit are installed in the electrical appliance control circuit box 17. The DCS stop indicator light HG and the interlocking stop signal indicator light HR11 are set on the opening and closing door 171 of the electrical appliance control circuit box, allowing the start signal indicator light HY11 to be wired on site, so that the operator can check the start conditions on site.

[0026] The above description is only the best embodiment of the present invention and is not any form of limitation to the present invention. Any technician familiar with the art can make many possible changes and modifications to the present invention using the methods and contents disclosed above without departing from the scope of the technical solution of the present invention, which all fall within the scope of protection of the claims.

Claims

1. A circuit for detecting the reliable operation of DCS contacts, comprising a high-voltage electrical appliance control circuit and a low-voltage electrical appliance control circuit, wherein the high-voltage electrical appliance control circuit comprises a high-voltage control power supply, a circuit breaker 1, a device power supply terminal, a field operation column closing and opening circuit, a field operation column opening circuit and a DCS interlocking shutdown switch; the low-voltage electrical appliance control circuit comprises a low-voltage control power supply, a circuit breaker 2 and a control circuit, characterized in that: The high-voltage electrical appliance control circuit also includes a start-up permission extension, an interlock stop signal extension, a reset circuit, an interlock stop signal indicator light HR11 and a start-up permission signal indicator light HY11; the low-voltage electrical appliance control circuit also includes a DCS stop indicator light HG; The power-on permission extension includes the control coil KA4 and the normally open auxiliary contact KA_4 of the intermediate relay four, and the DCS power-on permission contact F1, wherein one end of the conversion switch QK is connected to the positive power line of the high-voltage control power supply, the other end of the conversion switch QK is connected to one end of the DCS power-on permission contact F1, the other end of the DCS power-on permission contact F1 is connected to one end of the control coil KA4, and the other end of the control coil KA4 is connected to the negative power line of the high-voltage control power supply, and the power-on permission signal indicator HY11 and the normally open auxiliary contact KA_4 are connected in series between the positive power line and the negative power line of the high-voltage control power supply; The interlocking stop signal extension includes a DCS stop button F2 and a control coil KA1 of an intermediate relay, wherein the DCS stop button F2 and the control coil KA1 of the intermediate relay are connected in series between the positive power line and the negative power line of the high-voltage control power supply; the reset circuit includes a reset button SR, wherein the reset button SR, the normally open auxiliary contact KA_1 of the intermediate relay one, and the control coil KA2 of the intermediate relay two are connected in series between the positive power line and the negative power line of the high-voltage control power supply in sequence, the normally open auxiliary contact KA_1 is connected in parallel with the normally open auxiliary contact KA_2 of the intermediate relay two, and the interlocking stop signal indicator HR11 is connected in parallel with the control coil KA2 of the intermediate relay two; A DCS stop switch F3 and a DCS stop indicator light HG are connected in series between the live wire and the neutral wire of the low-voltage control power supply in the low-voltage electrical appliance control circuit.

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