CN-224231924-U - Magnetic latching misoperation detection system of fire-fighting bus isolator

CN224231924UCN 224231924 UCN224231924 UCN 224231924UCN-224231924-U

Abstract

The utility model discloses a magnetic latching malfunction detection system of a fire-fighting bus isolator, which belongs to the field of fire protection, wherein a fire-fighting host communicates normally with external alarm equipment under the vibration impact environment of the fire-fighting bus isolator, the reliability of the fire-fighting alarm system is provided, the malfunction problem of the bus isolator under the vibration impact environment can be solved, and the actions of the magnetic latching relay of the fire-fighting bus isolator can be effectively distinguished. The magnetic latching relay is connected with two bus communication circuits, the two bus communication circuits are connected with the MCU control circuit through a bus sampling circuit, the magnetic latching relay is respectively connected with a magnetic latching state detection circuit through a magnetic latching driving circuit, the magnetic latching state detection circuit comprises a relay K1, and a pin 8 of the relay K1 is connected with VCC. The utility model is mainly used for detecting the magnetic latching misoperation of the fire-fighting bus isolator.

Inventors

LI XIAOPENG
LIN TAO
Xie guanying

Assignees

青岛鼎信通讯消防安全有限公司

Dates

Publication Date: 20260512
Application Date: 20250509

Claims (4)

1. The magnetic latching misoperation detection system of the fire-fighting bus isolator comprises a magnetic latching relay and an MCU control circuit, wherein the magnetic latching relay is connected with two bus communication circuits, and is characterized in that the two bus communication circuits are connected with the MCU control circuit through a bus sampling circuit, the magnetic latching relay is respectively connected with a magnetic latching state detection circuit through a magnetic latching driving circuit, the magnetic latching state detection circuit comprises a relay K1, a pin 8 of the relay K1 is connected with VCC, a protection resistor R9 and a filter capacitor C3 are connected in series with a pin 9 of the relay K1, and a pin 5 of the relay K1 is respectively connected with a protection resistor R10 and a bidirectional voltage stabilizing diode VD10.
2. The fire bus isolator magnetic latching malfunction detection system according to claim 1, wherein the bus sampling circuit comprises a rectifier, a transistor VT1 and a transistor VT2, wherein the b pole of the transistor VT1 is connected with the rectifier through a filter capacitor C1 and a resistor R2, the e pole of the transistor VT1 and the e pole of the transistor VT2 are connected with the rectifier, the b pole of the transistor VT1 and the b pole of the transistor VT2 are connected with the rectifier through a resistor R5, the transistor VT1 and the transistor VT2 are connected with an optocoupler unit through diodes, and the optocoupler unit is connected with the filter capacitor C2.
3. The fire bus isolator magnetic latching malfunction detection system according to claim 2, wherein the optocoupler unit includes an optocoupler D1 and an optocoupler D2, a C-pole of the transistor VT1 is connected to a cathode of the optocoupler D2 through a diode VD6, a C-pole of the transistor VT2 is connected to an anode of the optocoupler D1 through a diode VD7, and an emitter of the transistor VT1 and an emitter of the transistor VT2 are connected to a filter capacitor C2.
4. The fire bus isolator magnetic latching malfunction detection system according to claim 1, wherein the magnetic latching driving circuit comprises a magnetic latching control chip U1, an OA pin of the magnetic latching control chip U1 is connected with an R pin of the relay K1, and an OB pin of the magnetic latching control chip U1 is connected with an S pin of the relay K1.

Description

Magnetic latching misoperation detection system of fire-fighting bus isolator Technical Field The utility model relates to the field of fire protection, in particular to a magnetic latching malfunction detection system of a fire-fighting bus isolator. Background The fire control bus isolator is an important component in the fire control alarm system and can isolate the fire control host from external alarm equipment with a short circuit. Protecting the equipment of the other loop from being affected. And after the external equipment line is recovered to be normal, the fire control host can be subjected to reset operation to recover to be normal. However, when the bus isolator is subjected to vibration impact, the state of the magnetic latching relay is changed, so that the bus isolator has higher requirements on the vibration impact resistance of the magnetic latching relay. And the misoperation of the bus isolator caused by vibration impact is avoided through magnetic latching misoperation detection. Most of bus isolator isolation protection switching devices in fire-fighting industry adopt single-pole double-throw electromagnetic relays, and when products need to meet the requirement of short-circuit power-on, magnetic latching relays are selected. In some situations with high vibration impact environment and safety requirements, the magnetic latching relay can change the state of the relay caused by external vibration impact, and the back-end equipment and the host cannot work normally. Disclosure of utility model The utility model aims to provide a magnetic latching malfunction detection system of a fire-fighting bus isolator, which is characterized in that a fire-fighting host communicates with external alarm equipment normally under the vibration impact environment of the fire-fighting bus isolator, the reliability of the fire-fighting alarm system is provided, the malfunction problem of the bus isolator under the vibration impact environment can be solved, and the actions of the magnetic latching relay of the fire-fighting bus isolator can be effectively distinguished. The utility model is realized by the following technical scheme: The utility model provides a fire control bus isolator magnetic latching malfunction detection system, includes magnetic latching relay and MCU control circuit, and magnetic latching relay is connected with two bus communication circuit, two bus communication circuit pass through bus sampling circuit and MCU control circuit and are connected, and magnetic latching relay is connected through magnetic latching drive circuit and magnetic latching state detection circuit respectively, and magnetic latching state detection circuit includes relay K1, and VCC is connected to relay K1's pin 8, and relay K1's pin 9 has established ties protection resistance R9 and filter capacitor C3, and relay K1's pin 5 is connected protection resistance R10 and bidirectional voltage stabilizing diode VD10 respectively. Further, the bus sampling circuit includes a rectifier, a transistor VT1 and a transistor VT2, wherein a b pole of the transistor VT1 is connected with the rectifier through a filter capacitor C1 and a resistor R2, an e pole of the transistor VT1 and an e pole of the transistor VT2 are connected with the rectifier, a b pole of the transistor VT1 and a b pole of the transistor VT2 are connected with the rectifier through a resistor R5, the transistor VT1 and the transistor VT2 are connected with an optocoupler unit through diodes, and the optocoupler unit is connected with the filter capacitor C2. Further, the optocoupler unit includes an optocoupler D1 and an optocoupler D2, a C-pole of the transistor VT1 is connected to a cathode of the optocoupler D2 through a diode VD6, a C-pole of the transistor VT2 is connected to an anode of the optocoupler D1 through a diode VD7, and an emitter of the transistor VT1 and an emitter of the transistor VT2 are connected to the filter capacitor C2. Further, the magnetic latching driving circuit comprises a magnetic latching control chip U1, an OA pin of the magnetic latching control chip U1 is connected with an R pin of the relay K1, and an OB pin of the magnetic latching control chip U1 is connected with an S pin of the relay K1. Compared with the prior art, the utility model has the beneficial effects that: 1. The fire control bus isolator is in the vibration impact environment, the fire control host communicates with the external alarm equipment normally, the reliability of the fire control alarm system is provided, the problem of misoperation of the bus isolator in the vibration impact environment can be solved, and the action of the magnetic latching relay of the fire control bus isolator is effectively distinguished. 2. Out_dt is high when the relay K1 is in the closed state, and out_dt is low when the relay K1 is in the open state. Therefore, if the BAD_OUT does not detect the low level, namely, when the isolator is in the normal working