JPH05171A - Automatic inspection apparatus for fire extinguishing installation - Google Patents

Abstract

(57) [Summary] [Purpose] To significantly reduce the cost of adjusting monitoring parameters. Detect sensor abnormality early. [Configuration] While confirming whether or not the actual data a is within the range of the maximum upper limit value MAX to the minimum lower limit value MIN (step 10
3), steps 101 to 109 are repeated to obtain the maximum value and the minimum value of the actual data a within the time width T. Then, an average value is calculated from the obtained maximum value and minimum value, and the system set value Im is set within ± 10% of the average value.
Determine ax and Imin. That is, the upper and lower limit widths of the monitoring parameters are determined with Imax as the upper limit value and Imin as the lower limit value. If it is confirmed in step 103 that the actual data a is not within the upper and lower limit width, the automatic setting of the upper and lower limit widths of the monitoring parameters is interrupted, and an alarm or the like is issued to notify that there is an abnormality in the sensor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic inspection system for fire extinguishing equipment, which is capable of regularly inspecting the fire extinguishing equipment on the basis of various data from various sensors arranged in the fire extinguishing equipment.

[0002]

2. Description of the Related Art Fire extinguishing equipment does not normally operate in a stopped state due to its nature. However, if there is a fire, it is necessary to exert its function 100%. For this reason, daily inspection and maintenance are important so that the equipment can be operated anytime, and the Fire Service Law requires that inspection and reporting. For example, as a regular inspection item, there is a pump shutoff operation test. In this pump shutoff operation test, the discharge side of the fire pump was shut off, and the discharge pressure, suction pressure, motor voltage value, motor current value, motor rotation speed, etc. were normal, that is, the fire pump had a specified capacity. Confirm whether or not to exert. Here, when performing the pump shutoff operation test, discharge pressure, suction pressure, motor voltage value,
Determine each monitoring parameter for various states such as motor current value and motor rotation speed, that is, define each monitoring parameter corresponding to each sensor that measures each value, and check whether the upper and lower limits of these monitoring parameters are met. Depending on whether it is normal or abnormal, it is judged.

[0003]

However, in the prior art, when the system was introduced, actual data from each sensor was obtained, and an appropriate value (average value) was determined based on this actual data. The upper and lower limit width with respect to an appropriate value, that is, the upper and lower limit width of each monitoring parameter corresponding to each sensor is manually adjusted, and there is a problem that an excessive number of man-hours are required for the adjustment. In addition, because an appropriate value is mechanically determined based on actual data and the upper and lower limit width of each monitoring parameter is manually adjusted, a sensor abnormality, for example, a sensor that outputs an excessive output unlike the design was installed. Even so, I sometimes overlooked this.

[0004]

The present invention has been proposed in order to solve such a problem. Whether the actual data from the sensor is within the predetermined upper and lower limit width corresponding to the regular sensor. After confirming whether or not the upper and lower limits of the monitoring parameters corresponding to the sensor are automatically determined based on the actual data.

[0005]

Therefore, according to the present invention, the upper and lower limit widths of the monitoring parameters corresponding to the sensor are automatically determined based on the actual data from the sensor. If the actual data from the sensor is not within the predetermined upper and lower limit width corresponding to the legitimate sensor, it is possible to interrupt the automatic setting of the upper and lower limit widths of the monitoring parameters and notify the sensor abnormality. It is possible.

[0006]

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

FIG. 2 is a system configuration diagram showing an embodiment of a fire extinguishing facility 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 the sprinkler heads 3-1 to 3-n, and 5 is a connecting pipe. An electric discharge valve provided in the middle of the path 4, 6 is a pressure tank, 7
Is an auxiliary pressure pump, and 8 is a priming tank.

The fire pump 2 pumps the water in the water tank 1 through the suction valve 2-2 through the foot valve 2-1. A check valve 9-1 is provided in the connecting line 4-1 connecting the fire pump 2 and the electric discharge valve 5. In addition, the connection line 4-1
A primary pressure regulating valve (motorized valve) 10 is attached to the.
The pressure tank 6 includes a pressure switch 6-1 for the fire pump,
A pressure switch 6-2 for the auxiliary pressurizing pump is provided, and it is assumed that the water in the tank can be discharged.
1 is attached. The auxiliary pressurizing pump 7 pumps the water in the water tank 1 through the suction valve 7-2 through the foot valve 7-1. The water pumped up by the auxiliary pressurizing pump 7 is supplied to the pressure tank 6 through the check valve 9-2 and the connecting conduits 12-1 and 12-2. Further, the connection conduit 12-1 communicates with the connection conduit 4-11 connecting the electric discharge valve 5 and the check valve 9-1 through the connection conduit 12-3. The electric discharge valve 5 is normally open, and the electric drain valve 11 and the electric test valve 15 described later are always closed. Further, the primary pressure adjusting valve 10 is always in a state where the pressure on the primary side of the valve is adjusted to the specified pressure.

The sprinkler heads 3-1 to 3-n are attached to the branch pipe line 13-1 communicating with the connection pipe line 4, and are provided in the middle of the pipe line before reaching the sprinkler heads 3-1 to 3-n. Is provided with a water flow detection device 14. When the sprinkler heads 3-1 to 3-n are opened even at one place, the flowing water detection device 14 detects the water flowing in the branch pipe line 13-1 and outputs an ON output. This running water detection device 14
The ON output sent by is used as a fire alarm signal or the like. The water flow detection device 14 also has a function as a check valve. On the other hand, in the middle of the branch line after reaching the sprinkler heads 3-1 to 3-n, an electric valve (hereinafter referred to as an electric test valve) 15 as a terminal test valve and an orifice 1 are provided.
6 is provided. Although only one branch pipe 13-1 is shown in the present embodiment, the connection pipe 4 is provided with a plurality of similar branch pipes connected to each other. Is also equipped with a sprinkler head and an electric test valve.

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

In the figure, the meters denoted by reference numerals 19-1 to 19-6 are pressure gauges, and the valves denoted by reference 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. 3 is a schematic block configuration diagram of a control device that controls automatic inspection of fire extinguishing equipment in this system. The control device 100 includes a CPU 100-1, a RAM
100-2, ROM 100-3, input interface 100-4, output interface 100-5 are provided, and the pressure gauge 19 is connected to the input interface 100-4.
Various state information (pressure information, current value information, rotation speed information, etc.) is given from various sensors such as -1 to 19-6. Then, by the processing of the CPU 100-1 according to a predetermined program, various commands are issued from the output interface 100-5 to various actuators such as the electric discharge valve 5 and various devices such as the fire pump 2.

Next, the basic operation of the fire extinguishing equipment shown in FIG. 2 will be described. Now, it is assumed that a fire has occurred and the sprinkler head 3-1 has been activated. Then, the water stored in the pressure tank 6 is connected to the connecting pipe lines 12-2, 12-.
3, it reaches the branch conduit 13-1 along the path of the connection conduit 4, passes through the flowing water detection device 14, and is ejected from the sprinkler head 3-1. When the pressure in the pressure tank 6 drops due to the jet from the sprinkler head 3-1, the pressure switch 6-2 for the auxiliary pressure pump is turned on. When the pressure switch 6-2 for the auxiliary pressurizing pump is turned on, the auxiliary pressurizing pump 7 is activated to supply water to the pressure tank 6. If the pressure in the pressure tank 6 is further reduced without being covered by the operation of the auxiliary pressurizing pump 7, the pressure switch 6-
1 turns on. This fire pump pressure switch 6-1
When the switch is turned on, the fire extinguishing pump 2 is activated to secure the jet 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 is turned off, and 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 is extinguished by manually operating a switch (not shown). During this time, the discharge pressure of the fire extinguishing pump 2 is maintained at an appropriate value by the operation of the primary pressure adjusting valve 10.

Next, a description will be given of a pump shutoff operation test periodically and automatically performed by the control device 100 in the fire extinguishing facility which performs such a basic operation.

When the control device 100 reaches a predetermined date and a predetermined time, the electric discharge valve 5 and the primary regulating valve 10 are closed, the fire extinguishing pump 2 is activated, and a pump shutoff operation test is started. In this pump shutoff operation test, the connection pipeline 12-
It is confirmed by the flow switch 17 that a predetermined amount of water is drained through 4, 12-5, and the discharge pressure, suction pressure, electric motor voltage value, electric motor current value, electric motor rotation speed, etc. of the fire extinguishing pump 2 are measured to extinguish the fire. It is confirmed whether the pump 2 exhibits a predetermined capacity. When it is confirmed that the fire extinguishing pump 2 is normal by this pump shutoff operation test, the fire extinguishing pump 2 is stopped, the primary regulating valve 10 is returned to the control state, and the electric discharge valve 5 is opened.

In the pump shutoff operation test, for example, discharge pressure, suction pressure, motor voltage value, motor current value,
Corresponding to each sensor that measures the motor rotation speed, the upper and lower limit width of each monitoring parameter is "1.0 to 18.5 kg / cm ₂ ", "0.0
~ 5.0kg / cm ₂ "," 380-460V "," 55-45A "," 1430
~ 1570 rpm ".

Here, the upper and lower limit width of each monitoring parameter is
It is automatically determined based on the actual data from each sensor. That is, the control device 100 automatically determines the upper and lower limit width of each monitoring parameter according to the flowchart shown in FIG.

Hereinafter, with reference to this flowchart,
Taking the motor current value as an example, the automatic setting of the upper and lower limit widths of the monitoring parameter will be described.

First, in step 401, the maximum value and the minimum value of the electric motor current value are obtained. The process of deriving the maximum value and the minimum value follows the flowchart shown in FIG.

First, in step 101, the memory A is set to 0 and the memory B is set to 0. Then, the actual data a from the sensor that measures the electric current value of the motor is fetched (step 10
2), the actual data a is the maximum upper limit value MAX to the minimum lower limit value MI.
It is confirmed whether or not it is within the range of N (step 10).
3). The maximum upper limit value MAX and the minimum lower limit value MIN are predetermined in correspondence with the regular sensor. When the actual data a is not within this maximum lower limit width, the abnormal bit is turned on (step 111) and monitoring is performed. In addition to interrupting the automatic setting of the upper and lower limit widths of parameters, an alarm etc. will be sent to notify that there is an abnormality in the sensor. That is, if a sensor that outputs an excessively large output is attached unlike the design, the actual data a becomes the maximum upper limit value MAX or more, and this can be known by issuing an alarm or the like. Further, when the sensor fails and does not output, the actual data a becomes the minimum value MIN or less, and this can be known by issuing an alarm or the like.

When it is confirmed in step 103 that the actual data a is within the range of the maximum upper limit value MAX to the minimum lower limit value MIN, the process proceeds to step 104 and the timer count value n is set to 1. Then, the process proceeds to step 105, and if A <a, that is, if a is larger than 0, then a is stored in the memory A (step 106). If A <a is not satisfied in step 105, the process proceeds to step 107. In step 107, if B> a, that is, if a is smaller than 0, a is stored in the memory B (step 10).
8). Then, the process proceeds to step 109, and it is confirmed that the timer count value n is less than or equal to the set value K, and
Returning to 02, the next actual data a is fetched.

Similarly, steps 102 to 109 are performed.
By repeating the above, the actual data a is the maximum upper limit value MAX ~
Assuming that it is within the range of the minimum value MIN, the maximum value of the actual data a is updated and stored in the memory A, and the minimum value of the actual data a is updated and stored in the memory B.

When the timer count value n becomes equal to or more than the set value K in step 109, that is, when the timer time T until n reaches K elapses, the stored data in the memory A at that time is set to the maximum value, The stored data in the memory B is stored as the minimum value, and n = 0, A =
0 and B = 0 are set (step 110), and the process returns to the main routine.

FIG. 5 shows an actual fluctuation state of the electric motor current value. By executing steps 101 to 110, the max of the electric motor current value in the time width T is stored as the maximum value and the min is stored as the minimum value. It

After deriving the maximum value and the minimum value of the electric motor current value, the control device 100 calculates the average value I _M of the electric motor current value from the maximum value and the minimum value (step 402). For example, ± 1 with respect to the calculated average value I _M
The system setting values Imax and Imin are determined by the upper and lower limit width of 0% (step 403). That is, with Imax as the upper limit value and Imin as the lower limit value, the upper and lower limit widths of the monitoring parameters for the electric motor current value are determined.

[0026]

As is apparent from the above description, according to the present invention, the upper and lower limit widths of the monitoring parameters corresponding to the sensor are automatically determined based on the actual data from the sensor. Therefore, the cost for adjusting the monitoring parameters can be significantly reduced. If the actual data from the sensor is not within the preset upper and lower limit widths corresponding to the legitimate sensor, the automatic setting of the upper and lower limit widths of the monitoring parameters may be interrupted and the abnormality of the sensor may be notified. It is possible to detect an abnormality of the sensor at an early stage, for example, a state in which a sensor that outputs an excessive output unlike the design is attached.

[Brief description of drawings]

FIG. 1 is a flowchart showing a derivation processing routine of a maximum value and a minimum value in FIG.

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

FIG. 3 is a schematic block configuration diagram of a control device that controls automatic inspection of fire extinguishing equipment in this system.

FIG. 4 is a flowchart showing a main routine of automatic setting processing of upper and lower limit widths of monitoring parameters performed by the control device shown in FIG.

FIG. 5 is a diagram showing a relationship between an actual fluctuation state of a motor current value and automatically set monitoring parameters and the like.

[Explanation of symbols]

 100 Control device 100-1 CPU 100-2 RAM 100-3 ROM 100-4 Input interface 100-5 Output interface

Claims (1)

Claim: What is claimed is: 1. An automatic inspection device for a fire extinguishing facility, which is capable of regularly and automatically inspecting the fire extinguishing facility on the basis of various data from various sensors arranged in the fire extinguishing facility. After confirming whether or not the data is within the predetermined upper and lower limit width corresponding to the regular sensor, the upper and lower limit width that automatically determines the upper and lower limit widths of the monitoring parameters corresponding to the sensor based on the actual data An automatic inspection device for fire extinguishing equipment, which is equipped with automatic setting means.