JPH04303475A - Automatic inspecting device for fire extinguishing equipment - Google Patents

Abstract

PURPOSE:To return a fire extinguishing equipment to the initial condition in the case of generating abnormality in a CPU and interrupting a main power supply. CONSTITUTION:An abnormality detecting contact 200-6 is opened by detecting abnormality (interruption of main power supply) of a CPU200-1. In this way, a normally-closed contact rx1 of a relay RX is closed to open an off-delay contact tm of a timer TM with a 2sec delay. Thus by energizing a relay RA electrified for 2sec, a normally-opened contact rb of a relay RB is on-off operated to interrupt a drive power supply to a fire extinguishing pump 2 with this relay RB serving as an off-command, and the fire extinguishing pump 2 is stopped. Further, a backup power supply is given to lines L2, L2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic inspection device for fire extinguishing equipment that can periodically automatically inspect the fire extinguishing equipment based on various information from various sensors arranged in the fire extinguishing equipment.

0002

BACKGROUND OF THE INVENTION Due to its nature, fire extinguishing equipment is normally not in operation. However, in the event of a fire, it is necessary to perform its functions 100%. For this reason, daily inspections and maintenance are important so that they can be operated at any time, and the Fire Service Act requires inspections and reporting. For example, one of the regular test items is a pump shut-off operation test. In this pump shut-off operation test, the discharge side of the fire pump was closed, and the discharge pressure, suction pressure,
Check whether the current value, rotation speed, etc. are normal, that is, whether the fire pump exhibits the specified performance.

0003

[Problems to be Solved by the Invention] However, in the past, periodic inspections of fire extinguishing equipment were almost always carried out manually, which took a lot of effort and time. For example, in the pump shut-off operation test, the discharge valve was manually closed to put the fire pump in a shut-off state, and the discharge pressure, suction pressure, current value, rotation speed, etc. were artificially checked. Therefore, the applicant attempted to automate periodic inspections. For example, in a pump shut-off operation test, the discharge valve is automatically closed to shut off the discharge side of the fire pump, and the fire pump is automatically started to measure the discharge pressure, suction pressure, current value, rotation speed, etc. It will be checked automatically. In order to manage this automatic inspection, a control device equipped with a CPU is provided. However, when such a control device is provided, if the CPU goes out of control,
Subsequent processing operations become undefined. Further, when the main power to the control device is cut off, subsequent processing operations are interrupted. In other words, if an abnormality occurs in the CPU or the main power supply to the control device is cut off, for example, a fire pump may be left running or a discharge valve may be left closed. A problem arises in that the fire extinguishing equipment cannot be activated immediately when a fire occurs.

0004

[Means for Solving the Problems] The present invention has been proposed to solve the above problems, and includes an abnormality detection means in a control means equipped with a CPU that controls automatic inspection using a first power source as a main power source. The abnormality detection means shall be used to detect abnormalities in the CPU and interruption of the main power supply, and based on the abnormality detected by this abnormality detection means, the second power supply (backup power supply) will be used to restore the fire extinguishing equipment to its initial state before inspection. This is what I tried to change back to.

[0005]

Therefore, according to the present invention, if the CPU goes out of control, for example, this is detected by the abnormality detection means, and the backup power source is used to return the fire extinguishing equipment to its initial state before inspection. Further, when the main power supply to the control means is cut off, this is detected by the abnormality detection means, and the fire extinguishing equipment is returned to the initial state before inspection using the backup power supply.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The automatic inspection device for fire extinguishing equipment according to the present invention will be explained in detail below.

FIG. 2 is a system configuration diagram showing an embodiment of fire extinguishing equipment including this automatic inspection device. In the figure, 1 is a water tank, 2 is a fire pump, 3-1 to 3-n are sprinkler heads, 4 is a connecting pipe connecting the fire pump 2 and sprinkler heads 3-1 to 3-n, and 5 is a connecting pipe. Electric discharge valve provided in the middle of path 4, 6 is a pressure tank, 7
is an auxiliary pressure pump, and 8 is a priming tank.

The fire pump 2 pumps up water in the water tank 1 through a suction pipe 2-2 via a foot valve 2-1. A check valve 9-1 is provided in the connecting pipe 4-1 that connects the fire pump 2 and the electric discharge valve 5. In addition, connection pipe 4-1
, a primary pressure regulating valve (electrically operated valve) 10 is attached. The pressure tank 6 includes a fire pump pressure switch 6-1,
A pressure switch 6-2 for the auxiliary pressurizing pump is provided, and an electric drain valve 11 is provided to drain water from the tank.
is attached. The auxiliary pressure pump 7 is a foot valve 7-1
The water in the water tank 1 is pumped up through the suction pipe 7-2. The water pumped by this auxiliary pressurizing pump 7 is pumped into the check valve 9
-2, and is supplied to the pressure tank 6 through connection pipes 12-1 and 12-2. Moreover, the connection pipe 12-1 communicates with the connection pipe 4-11 that connects the electric discharge valve 5 and the check valve 9-1 through the connection pipe 12-3. Note that the electric discharge valve 5 is always open, and the electric drain valve 11 and the electric test valve 15, which will be described later, are always closed. Further, the primary regulating valve 10 is normally in a state where the pressure on the primary side of the valve is adjusted to a specified pressure.

[0009] The sprinkler heads 3-1 to 3-n are attached to a branch pipe 13-1 communicating with the connecting pipe 4, and are placed in the middle of the pipe before reaching the sprinkler heads 3-1 to 3-n. A running water detection device 14 is provided. This running water detection device 14 is connected to one of the sprinkler heads 3-1 to 3-n.
If it opens at any point, water flowing in the branch pipe 13-1 is detected and an ON output is sent out. The ON output sent out by the running water detection device 14 is used as a fire alarm signal or the like. Furthermore, the flowing water detection device 14 also has a function as a check valve. On the other hand, in the middle of the branch pipe after reaching the sprinkler heads 3-1 to 3-n, an electric valve (
(hereinafter referred to as electric test valve) 15, and orifice 16
is provided. In addition, in this embodiment, only one branch pipe line 13-1 is shown, but a plurality of similar branch pipe lines are provided in communication with the connecting pipe line 4.
These branch pipes are similarly equipped with sprinkler heads, electric test valves, and the like.

Priming water for the fire pump 2 is stored in the priming water tank 8 . That is, the water stored in the priming tank 8 is supplied to the fire pump 2 as priming water through the check valve 9-3 and through the connecting pipe line 12-4. Water is supplied to the priming tank 8 through a water supply device 18. Further, a connecting pipe line 12-5 is provided to branch from the connecting pipe line 12-4,
A flow switch 17 is provided in the middle of the connecting pipe 12-5.

[0011] In the figure, meters indicated by numerals 19-1 to 19-6 are pressure gauges, and valves indicated by numerals 20-1 to 20-3 are manually operated valves. The valves 20-1 and 20-2 are normally open, and the valve 20-3 is normally closed.

FIG. 2 shows a system configuration on, for example, the first floor of a building, in which a system substantially equivalent to this except for the water tank 1 is constructed as a booster on each predetermined floor. A distributed control device 300 as shown in FIG. A center control device 100 is provided. The center control device 100 sends and receives various data, such as a fire signal, an inspection signal for other equipment, and an inspection signal for its own equipment, to and from the disaster prevention panel 400. In addition, the center control device 1
00 collects various information on fire extinguishing equipment via the central control device 200 and the distributed control device 300, and displays and displays the information.
In addition to printing and data storage, the general control device 20
Outputs an inspection command for 0. The central control device 200 receives inspection commands from the center control device 100 and sequentially outputs inspection operation start commands to the distributed control devices 300 in charge. The distributed control device 300 receives an inspection start command from the central control device 200 and performs an automatic inspection operation in accordance with the specified order.

FIG. 4 is a schematic block diagram of the overall control device 200. The overall control device 200 includes a CPU 20
0-1, RAM200-2, ROM200-3, input interface 200-4, output interface 20
0-5, and an input interface 200-4
Various types of information (pressure information, switch status information, current value information, rotation speed information, valve opening degree information, etc.) are provided from various sensors such as pressure gauges 19-1 to 19-6 via the distributed control device 300. . and a CPU that follows a predetermined program.
Through the process 200-1, various commands are issued from the output interface 200-5 to various actuators such as the electric discharge valve 5 and various devices such as the fire pump 2 via the distributed control device 300.

FIG. 1 is a circuit diagram showing only the main components of the connection relationship among the central control device 200, the distributed control device 300, and the fire pump 2. General control device 200
A main power source is supplied to the distributed control device 300 through lines L1, L1. The overall control device 200 is also provided with an abnormality detection contact 200-6 that detects and opens an abnormality in the CPU 200-1 and interruption of the main power supply. Abnormality detection contact 200-6 is connected between lines L2 and L2 via relay RX. Lines L2 and L2 have a backup power source (AC1) from an uninterruptible power supply (UPS).
00 volts) is given. A timer TM is connected in parallel to the relay RX.

On the other hand, the distributed control device 300 has an output contact 300-1 that turns on and off depending on the control status from the central control device 200. Output contact 300-1 is connected between lines L3 and L3 via relay RA. Direct current power supply (DC24
bolt) is given. Also, output contact 3
A series connection circuit of the off-delay contact tm of the timer TM and the normally closed contact rx1 of the relay RX is connected in parallel to 00-1. Further, a relay RB is connected between the lines L3 and L3 via a normally open contact ra of a relay RA. By turning on and off the normally open contact rb of this relay RB, this is set as an on command or an off command, and the drive power to the fire pump 2 via the lines L4, L4 is supplied or cut off.

FIG. 5 is a circuit diagram showing the connection relationship between the central control device 200, the distributed control device 300, and the electric discharge valve 5, with only the main components extracted. The electric discharge valve 5 is connected between the lines L2 and L2 via a normally open/normally closed contact rc of a relay RC. Relay RC is a normally open contact rx2 of relay RX and output contact 3 of distributed control device 300.
It is connected between lines L5 and L5 via 00-2. An alternating current power source (100 volts AC) is applied to the lines L5 and L5.

Next, the basic operation of the fire extinguishing equipment shown in FIG. 2 will be explained. Suppose now that a fire occurs and the sprinkler head 3-1 is activated. Then, the water stored in the pressure tank 6 flows through the connecting pipes 12-2, 12-
3. The water reaches the branch pipe 13-1 along the route of the connecting pipe 4, passes through the flowing water detection device 14, and is ejected from the sprinkler head 3-1. When the pressure inside the pressure tank 6 decreases with the ejection from the sprinkler head 3-1, the auxiliary pressure pump pressure switch 6-2 is turned on. When the auxiliary pressurizing pump pressure switch 6-2 is turned on, the auxiliary pressurizing pump 7 is activated to supply water to the pressure tank 6. If the pressure inside the pressure tank 6 decreases further because it cannot be covered by the operation of the auxiliary pressure pump 7, the fire pump pressure switch 6-1
turns on. When the fire pump pressure switch 6-1 is turned on, the fire pump 2 is activated to ensure water pressure from the sprinkler head 3-1 and to supply water to the pressure tank 6. When the water level in the pressure tank 6 rises, the pressure switch 6-2 for the auxiliary pressure pump turns off,
The operation of the auxiliary pressure pump 7 is stopped. Once the fire pump 2 is activated, the fire pump 2 continues its operation. The operation of the fire pump 2 can be stopped at any timing after the fire has been extinguished by manually operating a switch (not shown). During this time, the discharge pressure of the fire pump 2 is maintained at an appropriate value by the operation of the primary regulating valve 10.

Next, a pump shut-off operation test that is periodically and automatically carried out by the integrated control device 200 in fire extinguishing equipment that performs such basic operations will be explained. When a predetermined date and a predetermined time are reached, the integrated control device 200 closes the electric discharge valve 5 and the primary regulating valve 10, starts the fire pump 2, and starts a pump cut-off operation test. In this pump shut-off operation test, it is confirmed by the flow switch 17 that a predetermined amount of water is drained through the connecting pipes 12-4 and 12-5, and the discharge pressure, suction pressure, current value, rotation speed, etc. of the fire pump 2 are confirmed. is measured to check whether the fire pump 2 exhibits a predetermined ability. After confirming that the fire pump 2 is normal through this pump shut-off operation test, the fire pump 2 is stopped, the primary regulating valve 10 is returned to the controlled state,
Open the electric discharge valve 5.

Now, let us assume that the CPU 200-1 of the overall control device 200 goes out of control during the pump shut-off operation test. In FIG. 1, C of the central control device 200
Before the PU200-1 goes out of control, the abnormality detection contact 200-
6 is closed. As a result, the normally closed contact r of relay RX
x1 is in an open state, and the off-delay contact tm of the timer TM is in a closed state. In FIG. 1, a central control device 200
When the CPU 200-1 goes out of control, this is detected and the abnormality detection contact 200-6 opens. As a result, the normally closed contact rx1 of the relay RX closes, and after a predetermined time delay (2 seconds in this embodiment), the off-delay contact tm of the timer TM opens. As a result, relay RA is energized for 2 seconds, and normally open contact ra of relay RA is closed during this time. As a result, the normally open contact rb of the relay RB is turned on and off, and this is used as an off command to cut off the drive power to the fire pump 2, and the fire pump 2 is stopped. On the other hand, in FIG. 5, before the CPU 200-1 of the overall control device 200 goes out of control, the abnormality detection contact 200-6 is closed. As a result, normally open contact rx2 of relay RX is in the closed state,
Output contact point 300- in distributed control device 300
2, the relay RC is in the energized state. That is, the normally open/normally closed contacts rc of the relay RC are connected to the side I in the figure, and as a result, the electric discharge valve 5
is considered to be closed. In FIG. 5, when the CPU 200-1 of the central control device 200 goes out of control, this is detected and the abnormality detection contact 200-6 opens. As a result, the normally open contact rx2 of the relay RX opens, and the energized state of the relay RC is released. As a result, the normally open/normally closed contact rc of the relay RC is connected to the side shown in II, and the electric discharge valve 5 is returned to the open state.

Next, let us assume that the main power supply to the integrated control device 200 is cut off during the pump shut-off operation test. In FIG. 1, when the main power to the central control device 200 is cut off, this is detected and the abnormality detection contact 200-6 opens. As a result, the fire pump 2 is stopped in the same process as when the CPU 200-1 goes out of control. That is, even after the main power is cut off, the off command is generated using the backup power that is continuously supplied, and the drive power to the fire pump 2 is cut off. On the other hand, in FIG. 5, when the main power to the general control device 200 is cut off, this is detected and the abnormality detection contact 200-6 opens. This allows the CPU
The electric discharge valve 5 is returned to the open state in the same process as when 200-1 goes out of control. That is, the electric discharge valve 5 is returned to the open state by the backup power supply that is continuously supplied even after the main power supply is shut off.

[0021]

As is clear from the above explanation, according to the present invention, an abnormality detecting means is provided in the control means equipped with the CPU which uses the first power source as the main power source and controls automatic inspection, and the abnormality detecting means detects the CPU. The system detects abnormalities in the CPU and interruption of the main power supply, and the second power source is used to return the fire extinguishing equipment to its initial state before the inspection based on the abnormality detected by this abnormality detection means. Even if the main power supply is cut off, for example, the fire pump will not be left running or the discharge valve will not be left closed, and the fire extinguishing equipment will be immediately activated in the event of a fire. You will be able to start it.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing only the main components of a connection relationship among a central control device, a distributed control device, and a fire pump.

FIG. 2 is a system configuration diagram showing an embodiment of fire extinguishing equipment including an automatic inspection device according to the present invention.

FIG. 3 is a block configuration diagram showing the connection relationship of a central control device, a central control device, and a distributed control device that control automatic inspection of fire extinguishing equipment in this system.

FIG. 4 is a schematic block configuration diagram showing the inside of the overall control device shown in FIG. 3;

FIG. 5 is a circuit diagram showing only the main components of a connection relationship among a central control device, a distributed control device, and an electric discharge valve.

[Explanation of symbols]

200 General control device 200-1 CPU 200-2 RAM 200-3 ROM 200-4 Input interface 200-5
Output interface 200-6 Abnormality detection contact

Claims (1)

[Claims] 1. An automatic inspection device for fire extinguishing equipment that can periodically automatically inspect the fire extinguishing equipment based on various information from various sensors arranged in the fire extinguishing equipment, wherein the automatic A control means including a CPU that controls inspection, an abnormality detection means included in the control means that detects an abnormality in the CPU and a cutoff of the main power source, and a second power source is utilized based on the abnormality detected by the abnormality detection means. and an initial state return means for returning the fire extinguishing equipment to its initial state before inspection.