CN201638340U

CN201638340U - Fire prevention pre-alarm device for machine room of base station

Info

Publication number: CN201638340U
Application number: CN 201020175747
Authority: CN
Inventors: 卢代高
Original assignee: CHENGDU JUNTONG TELECOMMUNICATION Co Ltd
Current assignee: CHENGDU JUNTONG TELECOMMUNICATION Co Ltd
Priority date: 2010-04-29
Filing date: 2010-04-29
Publication date: 2010-11-17
Anticipated expiration: 2020-04-29

Abstract

The utility model discloses a fire prevention pre-alarm device for a machine room of a base station, which is provided with a sampling resistor connected with a power supply in series, and a power supply abnormal change monitoring circuit bridged on the sampling resistor. The power supply abnormal change monitoring circuit comprises a voltage comparator, an isolated coupling unit, a logical operation unit, an output alarm module and a remote monitoring alarm interface which are sequentially connected. The fire prevention pre-alarm device sets two stages of detections for potential fire hazards; particularly, the first detection is for the fire igniting as well as jumping and the increasing of electric energy loads of AC 380/220-V commercial power supply, and the second detection is for the increasing (causes unknown) of loads of a DC 48/24-V power supply output by a switch power supply cabinet for main equipment, and the short-circuit as well as fire ignition of the DC power supply; therefore, the fire prevention pre-alarm device can detect potential fire hazards for the machine room of the base station in advance, output a danger pre-alarm signal for a fire hazard through an external interface of the base station, and connect the alarm to a monitoring system, so as to realize remote monitoring, and timely cut off AC electricity and send technicians to the site to timely eliminate the potential fire hazards for the machine room.

Description

Base station machine room fire prevention prior-warning device

Technical field

The utility model relates to the communication base station equipment technical field, refers more particularly to base station machine room fire prevention prior-warning device.

Background technology

, all be to finish the personal mobile phone call function at present by networkings such as being distributed in city, rural communication base station equipment based on the wireless communication system of three big common carriers of China Mobile, China Telecom, CHINAUNICOM.These communication base station great majority are based upon open-air unmanned guard's state, the board house structure that belongs to movable type that has.

At present, base station equipment all carries the external alarm interface, and base station equipment can be according to the interface voltage situation of change, and warning information is sent to the Operation ﹠ Maintenance System of Surveillance center, can realize remote monitoring.

In the process that realizes native system, the inventor finds that the base station machine room catching fire all took place base station, annual various places, and base station equipment is burnt, and communication disruption causes great economic loss and abominable social influence.The inventor has carried out technical Analysis to part base station reason on fire, and drawing reason of fire is that the arcing that loose contact etc. cause, spark phenomenon, the kindling material of initiation cause machine plate rack catching fire machine room owing to the short circuit of power devices electrical voltage system.Though at present calculator room equipment is provided with smoke alarm equipment, must when being arranged, smog could start on fire, and can not the generation of effectively fire preventing phenomenon.

Summary of the invention

The purpose of this utility model is to have proposed a kind of base station machine room fire prevention prior-warning device, the phenomenons such as sparking that can cause to the increase of base station equipment electric power system load unknown cause, to loose contact, take a sample by the resistance that is connected in the three-phase firewire respectively, when phase current increases, the sample resistance change in pressure drop realizes alarm monitoring as sampling value, thereby finds the omen of base station machine room fire in advance, in time cut off alternating current and in time send the last station of technician to be checked, eliminate disaster hidden-trouble.

The technical scheme that the utility model solves above technical matters is:

Base station machine room fire prevention prior-warning device, it is characterized in that: be provided with the sample resistance of connecting with power supply and with by being connected across the abnormity of power supply variation monitoring circuit on the sample resistance, abnormity of power supply variation monitoring circuit comprises voltage comparator, isolation coupling unit, arithmetic logic unit, outputting alarm module, the remote monitoring alarm interface that connects successively.

Described voltage comparator comprises standard voltage source, comparer, lagging circuit, the output driver element that connects successively.

Described abnormity of power supply variation monitoring circuit comprises AC power ANOMALOUS VARIATIONS testing circuit and direct supply ANOMALOUS VARIATIONS testing circuit.

Described AC power ANOMALOUS VARIATIONS testing circuit comprises with the air switch of three-phase alternating current electrical connection, by the corresponding sample resistance of connecting with three-phase supply of air switch, also comprise the voltage comparator corresponding successively, isolation coupling unit, sub-arithmetic logic unit with sample resistance, last other sub-arithmetic logic unit of three branches gathers and is connected to total arithmetic logic unit, and total arithmetic logic unit is connected to the outputting alarm module again;

The outputting alarm module of described AC power ANOMALOUS VARIATIONS testing circuit is formed by the amplifier, isolator and the alarm driver module that connect successively;

The remote monitoring alarm interface of described AC power ANOMALOUS VARIATIONS testing circuit forms the loop by the time-delay conduction device between remote monitoring alarm interface and the air switch.

The sample resistance of connecting between described direct supply ANOMALOUS VARIATIONS testing circuit and Switching Power Supply cabinet that is equipped with battery pack and the base station main equipment is connected.

The beneficial effects of the utility model are as follows:

Detect the detection of the power budget increase of the first couple of AC power civil power 380V or 220V and sparking, arcing by the secondary disaster hidden-trouble set up; Second pair of detection that increases (unknown cause increase) and direct supply short circuit, sparking by the direct current 48V or the 24V power supply load of Switching Power Supply cabinet output confession main equipment, can find the omen of base station machine room fire in advance, in time cut off alternating current and in time send the last station of technician to be checked, eliminate disaster hidden-trouble.

Description of drawings

Fig. 1 is the principle assumption diagram that AC power of the present utility model detects

Fig. 2 is the principle assumption diagram that direct supply of the present utility model detects

Embodiment

Shown in Fig. 1-2, base station machine room fire prevention prior-warning device, be provided with the sample resistance 1 of connecting and by being connected across the abnormity of power supply variation monitoring circuit on the sample resistance 1, abnormity of power supply variation monitoring circuit comprises voltage comparator 2, isolation coupling unit 3, arithmetic logic unit 4, outputting alarm module 5, the remote monitoring alarm interface 6 that connects successively with power supply.

Described voltage comparator 2 comprises standard voltage source, comparer, lagging circuit, the output driver element that connects successively.

Described AC power ANOMALOUS VARIATIONS testing circuit comprises with the air switch 7 of three-phase alternating current electrical connection, by the corresponding sample resistance of connecting 1 with three-phase supply of air switch 7, also comprise the voltage comparator 2 corresponding successively, isolation coupling unit 3, sub-arithmetic logic unit with sample resistance 1, last other sub-arithmetic logic unit of three branches gathers and is connected to total arithmetic logic unit 4b, and total arithmetic logic unit 4b is connected to outputting alarm module 5 again;

The outputting alarm module 5 of described AC power ANOMALOUS VARIATIONS testing circuit is formed by the amplifier, isolator 9 and the alarm driver module 10 that connect successively;

The remote monitoring alarm interface 6 of described AC power ANOMALOUS VARIATIONS testing circuit forms the loop by time-delay conduction device 11 between remote monitoring alarm interface 6 and the air switch 7.

The sample resistance 1 of series connection is connected between described direct supply ANOMALOUS VARIATIONS testing circuit and Switching Power Supply cabinet 13 that is equipped with battery pack 12 and the base station main equipment 14.

Principle of work of the present utility model is as follows:

When being provided with under the normal load situation, A phase current pressure drop voltage from the sample resistance 1 is a standard value, in comparer, establish the magnitude of voltage of 2 times of overgauge values (threshold value perhaps according to circumstances specifically is set), the threshold voltage of device as a comparison, when sampling voltage value surpassed 2 times of threshold values, the comparer conducting was exported a drive signal to arithmetic logic unit, by outputting alarm module 5, the abnormality alarming signal that produces an electric current increase is to remote monitoring alarm interface 6.

Other B, C phase voltage from series connection resistance sampling on line, insert voltage comparator 2 respectively respectively, and its principle of work is same as described above.

Second level protection is shown for prison that 48V (or 24V) direct supply of main equipment power supply is taken a sample; method remains sample resistance 1 of series connection on the direct current supply line; after 2 judgements of the access of the pressure drop ANOMALOUS VARIATIONS on the sample resistance 1 voltage comparator, the electric current that starts unknown cause increases, the alarm of load increase is exported.

When equipment or coupling part come in contact sparking, arcing, produce continuous high impulse electric current, obtain corresponding high pulse voltage continuously through sample resistance 1, this high pulse voltage inserts voltage comparator 2, make voltage comparator 2 conductings, produce the conducting pulse, this pulse enters lagging circuit, after the judgement of the above pulse conducting of continuous generation 5 times (number of times perhaps according to circumstances specifically is set), start the sparking alarm and export the remote monitoring interface to; First order sparking protection is identical with second level sparking protection philosophy, no longer repeats.

After alarm time is crossed 20 minutes (can adjust), Delayed Alarm signal of time-delay conduction device 11 outputs is to civil power air quick closing valve, drive air switch 7 and cut off three-phase supply automatically, have the disaster hidden-trouble that three-phase supply causes thereby in time cut off, this moment, power devices was all born by the accumulator of low-voltage.

Claims

1. base station machine room fire prevention prior-warning device, it is characterized in that: be provided with the sample resistance (1) of connecting and by being connected across the abnormity of power supply variation monitoring circuit on the sample resistance (1), abnormity of power supply variation monitoring circuit comprises voltage comparator (2), isolation coupling unit (3), arithmetic logic unit (4), outputting alarm module (5), the remote monitoring alarm interface (6) that connects successively with power supply.

2. base station machine room fire prevention prior-warning device according to claim 1, it is characterized in that: described voltage comparator (2) comprises voltage source, comparer, lagging circuit, the output driver element that connects successively.

3. base station machine room fire prevention prior-warning device according to claim 1, it is characterized in that: described abnormity of power supply variation monitoring circuit comprises AC power ANOMALOUS VARIATIONS testing circuit and direct supply ANOMALOUS VARIATIONS testing circuit.

4. base station machine room fire prevention prior-warning device according to claim 3, it is characterized in that: described AC power ANOMALOUS VARIATIONS testing circuit comprises the air switch (7) that is electrically connected with three-phase alternating current, sample resistance (1) by the corresponding series connection of air switch (7) with three-phase supply, also comprise the voltage comparator (2) corresponding successively with sample resistance (1), isolation coupling unit (3), sub-arithmetic logic unit (4a), other sub-arithmetic logic unit (4a) of last three branches gathers and is connected to total arithmetic logic unit (4b), and total arithmetic logic unit (4b) is connected to outputting alarm module (5) again.

5. according to claim 3 or 4 described base station machine room fire prevention prior-warning devices, it is characterized in that: the outputting alarm module (5) of described AC power ANOMALOUS VARIATIONS testing circuit is formed by the amplifier (8), isolator (9) and the alarm driver module (10) that connect successively.

6. according to claim 3 or 4 described base station machine room fire prevention prior-warning devices, it is characterized in that: the remote monitoring alarm interface (6) of described AC power ANOMALOUS VARIATIONS testing circuit forms the loop by time-delay conduction device (11) between remote monitoring alarm interface (6) and the air switch (7).

7. base station machine room according to claim 3 fire prevention prior-warning device is characterized in that: the sample resistance (1) of connecting between described direct supply ANOMALOUS VARIATIONS testing circuit and Switching Power Supply cabinet (13) that is equipped with battery pack (12) and the base station main equipment (14) is connected.