JPH0424068B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic inspection device for fire extinguishing equipment that automatically checks whether or not there is an abnormality in the fire extinguishing equipment when an earthquake is detected.

Conventionally, in the case of fire extinguishing equipment that supplies pressurized fire extinguishing water to the sprinkler head by operating a fire extinguishing pump in the event of a fire, automatic inspection equipment is periodically used to maintain the equipment in a state in which it can operate normally. For example, pumps are operated once every month to measure the operating status of the pumps, the pressure inside the pipes, etc., and process them as inspection data. There is no inspection function in place in case of an earthquake, so when an earthquake occurs, equipment is patrolled to check for abnormalities.

However, it is difficult to fully detect abnormalities in equipment through patrol inspections, and pump operation tests using manual operation may cause water damage due to water leakage from damaged parts if there is an abnormality in the piping equipment. There was a risk that the damage would be further aggravated by driving.

The present invention was made in view of such conventional problems, and is an automatic fire extinguishing equipment system that can automatically check the equipment condition and check whether the equipment can operate normally in the event of an earthquake. The purpose is to provide inspection equipment.

In order to achieve this objective, the present invention connects a seismic sensor installed at a predetermined position of fire extinguishing equipment to a control processing device that performs periodic automatic inspection control and data processing indicating the equipment status at the time of inspection. When an earthquake is detected by this seismic sensor, the condition of the fire extinguishing pump and the pressure inside the pipes are measured by the detector, and the measured data is input to the control processing device for processing, thereby detecting equipment abnormalities. It is designed to determine the presence or absence.

Additionally, if an earthquake is detected by a seismic sensor during an inspection, the fire extinguishing pump is controlled to stop, and after the pump is stopped, at least the pressure inside the piping is detected by the operation of the detector and the data is processed to detect equipment abnormalities. It is designed to determine the presence or absence.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is an explanatory diagram showing an example of fire extinguishing equipment in which the automatic inspection device of the present invention is used.

First, to explain the configuration, fire pump equipment is installed in the basement B1F of the building, and in this fire pump equipment, 1 is a fire pump, 2 is a fire pump 1
The motor 2 is operated and stopped by the pump control panel 3. A water source tank 4 is provided under the floor of the fire pump 1, a suction pipe 5 of the fire pump 1 is lowered to the water source tank 4, and a main pipe 6 is connected to the discharge side of the fire pump 1. The main pipe 6 is vertically raised inside the building. A branch pipe 8 is connected to each floor of the building where the main pipe 6 is installed via an alarm valve 7, and a sprinkler head 9 provided on the ceiling is connected to the branch pipe 8 provided in the ceiling. Further, the end of the branch pipe 8 is connected to a drain pipe 12 via a test valve 10 at the end of the pipe.

In addition, a pressure tank 14 is installed in the fire pump equipment on the basement B1F, and piping is connected to the pressure tank 14 from the main pipe 6. Intra-pipe pressure is introduced to compress the internal air, and this compressed air maintains the in-pipe pressure in the main pipe 6 above a predetermined pressure at which the sprinkler head 9 can operate.

Further, a priming tank 16 is provided on the left side of the fire extinguishing pump 1, and supplies priming water to the extinguishing pump 1 at all times.

Next, to explain the equipment and detectors provided to inspect such fire extinguishing equipment, firstly, a flow rate test pipe 18 leading to the water source water tank 4 is provided on the discharge side of the fire pump 1, and this flow rate test An electric valve 20 and a flow meter 22 are provided in the pipe 18, and the performance of the fire pump 1 can be tested by opening the electric valve 20. In addition, in order to detect the pump status of the fire pump 1, the suction pressure P1
A pressure gauge 24 for detecting the discharge pressure P2 and a pressure gauge 26 for detecting the discharge pressure P2 are provided.
Pressure gauge 2 that also detects tank pressure PT for 4
8 and a pressure switch 30 which closes the contact when the tank pressure drops below a certain pressure.

In addition, in order to detect the pressure of the piping installed on each floor, an alarm valve pressure gauge 32 and an alarm valve pressure switch 34 are provided on the secondary side of the alarm valve 7, and a pipe end test valve 10 is installed at the end of the branch pipe 8. A pressure gauge 36 at the end of the tube is provided to detect the primary pressure.

Furthermore, in the case of fire extinguishing equipment using the automatic inspection device of the present invention, the seismic sensor 38 is installed on the nF near the top floor, which is the location where the greatest shaking occurs when an earthquake occurs.

Of course, the installation location of the seismic sensor 38 is not limited to the floor near the roof of the building, but it is desirable to install it near the location most susceptible to damage in the fire extinguishing equipment.

FIG. 2 is a block diagram showing an embodiment of the automatic inspection device according to the present invention together with equipment and detectors installed in a fire extinguishing facility.

First, to explain the configuration, 40 is a control processing device that performs automatic inspection control and inspection data processing under program control of a microcomputer, and connects equipment and detectors to be controlled during inspection with connectors 42a and 42b. are doing. 44 is an input/output interface connecting the connectors 42a and 42b with signal lines; 46 is a central processing unit (hereinafter referred to as CPU) of a microcomputer that performs inspection control and data processing according to a predetermined control program; A repeater transmission control section 48, a pulse input section 50, a control output section 52, and an analog input section 54 are provided between the interface 44 and the CPU 46.

Here, the repeater transmission control unit 48 calls the repeater provided for each floor in order to open the pipe end test valve 10 of each floor shown in FIG. 1 and output a control signal for operating the pump under actual load. The pulse input unit 50 has a function of inputting a pulse signal that is a contact output from a detector that detects the equipment status, and the control output unit 52 inputs a control signal for equipment according to an inspection control program. Furthermore, the analog input section 54 has a function of converting an analog detection signal from a detector that detects the state of equipment into a digital signal and inputting the digital signal.

Furthermore, a time signal is given to the CPU 46 from a clock unit 56, and the control processing unit 40
With the automatic mode selected, automatic inspections are performed at regular intervals, for example, every month, based on the time signal. Furthermore, the CPU 46 includes a message display section 58 that displays messages corresponding to inspection operations, a system status display section 60 that displays the system status at the time of inspection, an operation section 62 that includes a group of switches necessary for equipment inspection, and a message display section 58 that displays messages corresponding to inspection operations. A printer 64 that outputs processed inspection data and an alarm buzzer 66 that issues an alarm when an equipment abnormality is detected during inspection are provided.

Next, the equipment and detectors connected to the control processing device 40 will be explained. First, the equipment and detectors provided in the fire extinguishing pump equipment in the fire extinguishing equipment shown in FIG. 1 are connected to the connector 42a side.

That is, 68 is a starting device for the pump control panel 3, and 70
1 is also a stop device for the pump control panel 3, and starts and stops the fire extinguishing pump 1 using a contact signal based on a control signal from the control processing device 40. 7
2 is a voltmeter that detects the voltage of the pump control panel 3, 7
4 is an ammeter that detects the current during pump operation, and each is output as an analog signal of 4 to 20 mA. 76 is a trouble detector that detects an abnormality in the pump control panel 3 and outputs a contact signal; 78 is a star operation detector that outputs a contact signal indicating the pump star operation time; 80 is a star operation detector that detects the pump rotation speed and detects the number of rotations of the pump; This is a tachometer that outputs a 20mA analog signal.

A liquid level alarm 82 shown following the tachometer 80,
84 and 86 output a liquid level alarm signal as a contact signal when the water level of the elevated water tank provided on the rooftop, the priming water tank 16 in the basement, and the water source water tank 4 falls outside a certain level range. Reference numeral 88 is a fire alarm, and a transfer contact from a fire receiver is used. If a fire is detected during automatic inspection, the control processing device 40 will stop the inspection based on the output of the fire alarm 88, and Pump operation will be switched to respond to the occurrence.

Furthermore, following the fire alarm 88, there is a pressure gauge 2 that detects the suction pressure P1 shown in the fire extinguishing equipment in FIG.
4. A pressure gauge 26 for detecting the discharge pressure P2, a pressure gauge 28 for detecting the tank pressure PT, and a pressure switch 30 for the pressure tank 14 are shown, and furthermore, an electric valve 20 and a flow meter provided in the flow rate test pipe 18 are shown. 22 is shown.

On the other hand, on the connector 42b side, there is a No. provided for each floor.
Repeaters 90 indicated by 1 to n are connected, and each repeater 9
0 is connected to the alarm valve pressure switch 34, alarm valve pressure gauge 32, pipe end test valve 10, and pipe end pressure gauge 36 provided on each floor, and is relayed by the relay transmission control unit 48 provided in the control processing device 40. The test valve 10 at the end of the tube is activated when the device is called, and the measured values of the pressure inside the tube by each detector connected to the repeater are input.

Further, a signal line is connected to a seismic sensor 38 to the connector 42b side, and the seismic sensor 38 is activated to output an earthquake detection signal to the control processing device 40 when it detects seismic vibration with a certain acceleration or more. ing.

Next, the operation of the embodiment shown in FIG. 2 will be explained.

FIG. 3 is a flowchart showing the control process of the pump operation test by the automatic inspection device shown in FIG. A series of pump operation tests are performed with periodic automatic starts based on the time signal.

That is, when an inspection is started manually or automatically, block c first prints the pump operation test and the date, time, and minute, which are inspection items, and block d first prints the voltage and pressure of the pump control panel 3 when the pump is stopped. Total 24.2
The suction pressure P1, discharge pressure P2, and tank pressure PT detected in steps 6 and 28 are measured and printed. This voltage and pressure measurement process is carried out by the control processing device 40.
Power is supplied to the detector to be measured, and the detected values obtained by the power supply are read and data processed.

When the measurement of the inspection data as the initial value in block d is completed, the pump start-up is controlled in block e, the pump start-up time is printed in the following block f, and the start-up is confirmed in determination block g. Block h measures and prints the pump start time. The pump starting time is measured based on the switching time of the motor from the star connection to the delta connection in the pump control panel 3.

Next, in block i, it is determined that the startup time is within a certain period of time, and the process proceeds to block j. One minute after the pump startup, in addition to the measured values shown in block d, the current and pump rotation speed of the pump control panel are measured. The added measurement value is measured and printed, and when the inspection data processing of the pump operation status is completed, 30 is displayed in block k.
A stop control is performed to stop the pump after a second, and the pump stop time is printed in block 1. Furthermore, after 30 seconds have passed since the pump stopped in block m,
The pump status and pressure are measured and printed, and finally, in block n, the pump operation test items and end time are printed. Of course, if startup confirmation is not obtained in blocks g and i, or if the startup time exceeds a certain time, the process proceeds to block o, where the alarm buzzer 66 sounds and a pump operation test is performed to determine if the pump has not started normally. to inform about something.

In addition to the automatic inspection function shown as an example in FIG. 3, the control processing device shown in FIG. 2 is equipped with an automatic inspection function upon earthquake detection shown in the flowchart of FIG. 4.

That is, if the control processing device 40 is supplied with power and kept in an operating state even during the inspection period, and the seismic sensor 38 outputs an earthquake detection signal due to the occurrence of an earthquake while the control processing device 40 is in the operating state, Fourth
The interruption routine of inspection control processing based on earthquake detection shown in the figure is executed.

That is, when an interrupt due to earthquake detection is received, block A prints the year, month, day, hour and minute of the earthquake occurrence, discrimination block B determines that an inspection is not in progress, and the process proceeds to block C. The voltage of the control panel 3, pump suction pressure P1, pump discharge pressure P2, and tank pressure PT are activated by supplying power to each detector, the detected values are input, and the measured values are printed.

When the pump status measurement process in block C is completed, a predetermined reference value is compared with the measured value in judgment block D, and if there is an abnormality in the measured value, the process proceeds to block E, where the alarm buzzer 66 is activated. It makes a sound to notify you of a pump abnormality and also prints out the abnormality item. If there is no abnormality in the measured value in this judgment block D, then block F
Then, through the processing of blocks F to J, the repeaters 90 provided on each floor are sequentially called to measure the pipe pressure and determine whether there is an abnormality. That is, in block F, the No. 1 repeater is first called, and the pipe internal pressure detected by the alarm valve pressure gauge 32 and pipe end pressure gauge 36 connected to the called repeater 90 is input and data is input. Processing and printing, followed by judgment block H
The measured value of block G is compared with the reference value to determine whether the measured value is normal or not. If the measured value is abnormal, an alarm is issued and the abnormal location is printed in block I. Of course, if there is no abnormality in the measured value, If so, the process directly advances to judgment block J, calls the next No. 2 repeater, and performs a similar abnormality judgment based on the detection of the pipe pressure.

In this manner, when the inspection process by calling repeaters up to No. n is completed, the inspection end time is printed in block K, and the process returns to the standby state for starting inspection based on the normal time signal.

As is clear from the earthquake detection flowchart shown in Figure 4, when an earthquake that could cause damage to fire extinguishing equipment is detected, the pump status and piping pressure on each floor are automatically measured. It is necessary to determine whether there is an abnormality in the value, and when an earthquake occurs, by checking the output data of the control processing device, it is easy and simple to check whether the fire extinguishing equipment has been damaged by the earthquake, and to what extent. I understand.

On the other hand, if an earthquake occurs during an inspection by the control processing device 40, it will be determined at determination block B in the flowchart of FIG. In the subsequent block M, it is determined whether or not the pressure switch 30 installed in the pressure tank 14 will be turned on due to a decrease in the pressure inside the pipe within a certain period of time, for example, 30 seconds after the pump is stopped, and the pressure switch 30 will be turned on within 30 seconds. When the switch is detected, it is assumed that the piping of the fire extinguishing equipment has been damaged due to the earthquake and the pressure inside the pipe has decreased, and an alarm is issued to stop the inspection.Meanwhile, the judgment block M determines whether or not the pressure switch 30 is turned on within 30 seconds. Without it,
It is assumed that there was no major damage to the equipment due to the earthquake. However, if the pressure inside the pipe is gradually decreasing, it may be difficult to detect it within the above fixed time, for example, 30 seconds, so proceed to block C as shown in the diagram and check the pressure gauges on each floor. The values and pump status are measured, and the determination blocks D and H are respectively
If it is thus determined that there is no abnormality in the equipment, the pump operation test that was interrupted, for example, as shown in FIG. 3, is restarted from the beginning.

In the above embodiment, only the pump operation test according to the flowchart in Figure 3 is shown as inspection control by the automatic inspection device, but other inspection controls include the flow rate test piping in the fire extinguishing equipment shown in Figure 1. A pump performance test is carried out by opening the electric valve 20 installed at the branch pipe 18 on each floor.Furthermore, the pipe end test valve 10 installed at the end of the branch pipe 8 on each floor is opened to create the same operating state as the sprinkler head 9. An inspection control program such as an actual load operation test for operating 1 is prepared in advance.

Next, to explain the effects of the present invention, a seismic sensor installed at a predetermined position of the fire equipment is connected to a control processing device that performs periodic automatic inspection control and data processing indicating the equipment status of inspection values. When an earthquake is detected by a seismic device, the condition of the fire pump and piping pressure are measured by the detector, and the measured data is input to the control processing device and processed to determine whether there is an abnormality in the equipment. Therefore, when an earthquake occurs, it is possible to quickly and easily know the damage caused by the earthquake to the fire extinguishing equipment from the output data and alarm from the control processing device, and if there is damage, the failure location can be immediately identified from the output data. Prompt repair measures can be taken. In addition, even if an earthquake occurs during an inspection, the pump operation will be stopped urgently based on the earthquake detection signal from the seismic sensor, and inspection control will be restarted after confirming that there is no drop in pipe pressure. Therefore, even if an earthquake occurs during an inspection, we can respond quickly, and we can continue the inspection even if damage has been caused by an earthquake to prevent further water damage or equipment damage caused by broken pipes. It can also be prevented from expanding.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an example of fire extinguishing equipment in which the automatic inspection device of the present invention is used, FIG. 2 is a block diagram showing an embodiment of the present invention together with equipment and detectors, and FIG. 2 is a flowchart showing an example of inspection control according to the embodiment, and FIG.
FIG. 7 is a flowchart showing inspection control processing when an earthquake is detected according to the embodiment shown in the figure. 1... Fire pump, 2... Motor, 3... Pump control panel, 4... Water source tank, 5... Suction pipe, 6
...Main pipe, 7...Alarm valve, 8...Branch pipe, 10...
... Pipe end test valve, 12 ... Drain pipe, 14 ... Pressure tank, 16 ... Priming water tank, 18 ... Flow rate test piping, 20 ... Electric valve, 22 ... Flow meter, 24 ...
Pressure gauge (suction pressure P1), 26... pressure gauge (discharge pressure P2), 28... pressure gauge (tank pressure PT),
30...Pressure switch, 32...Alarm valve pressure gauge,
34...Alarm valve pressure switch, 36...Pipe end pressure gauge, 38...Seismic sensor, 40...Control processing device, 4
2a, 42b...connector, 44...input/output interface, 46...CPU (central processing unit),
48... Repeater transmission control section, 50... Pulse input section, 52... Control output section, 54... Analog input section, 56... Clock unit, 58... Message display section, 60... System status display section , 62...
Operation unit, 64...Printer, 66...Alarm buzzer, 68...Starting device, 70...Stopping device, 74
...Ammeter, 76...Trouble detector, 78...
Operation detector, 80... Tachometer, 82, 84, 86
...Liquid level alarm, 88...Fire alarm, 90...
Repeater.

Claims (1)

[Scope of Claims] 1. A fire extinguishing pump that supplies extinguishing water under pressure, a drive device that drives the extinguishing pump, a extinguishing head that sprays extinguishing water from the extinguishing pump, and the extinguishing head. The fire extinguishing pump is operated by periodically driving the driving device based on a time signal from a clock unit, and the fire extinguishing pump is detected by a detector. In an automatic inspection system for fire extinguishing equipment equipped with a control processing device that inputs and processes measured values of pump operating status or pipe pressure, an earthquake sensor installed at a predetermined position of the fire extinguishing equipment is connected to the former control processing device. However, when an earthquake detection signal is input from the seismic sensor other than during an inspection, the condition of the fire pump and the pressure inside the pipes are detected by the operation of the detector, and the presence or absence of equipment abnormality is determined by processing the data. In addition, if an earthquake detection signal is input from a seismic sensor while the fire pump is in operation for inspection, the fire pump is controlled to stop, and after the pump is stopped, at least the pressure inside the piping is detected by the operation of the detector. An automatic inspection device for fire extinguishing equipment, characterized in that the control processing device is provided with an earthquake processing means for determining the presence or absence of equipment abnormality by processing data.