JPH04303472A - Automatic inspecting device for fire extinguishing equipment - Google Patents

Abstract

PURPOSE:To perform normal time supervision in addition to periodical supervision at a low cost without causing erroneous decision. CONSTITUTION:A fire extinguishing equipment is normally supervised by comparing normality/abnormality of various conditions of the equipment with each decision parameter. A required decision parameter, determined in accordance with a kind of a test performed in periodic inspection, is automatically changed in the case of executing this test. For instance, each decision parameter relating to a delivery pressure, suction pressure, electric motor voltage value, etc., determined in accordance with a pump no-discharge operation test, is automatically changed (in step 101) in the case of executing the pump no-discharge operation test. In this way, a periodic inspection sensor and a normal time supervizing sensor are made in common use, and in addition to periodic supervision, normal time supervision can be realized without causing erroneous decision to promote a cost.

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 inspection 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 motor voltage value, motor current value, motor rotation speed, etc. are normal, that is, whether the fire pump exhibits the predetermined performance. When performing the above-mentioned pump shut-off operation test, each judgment parameter is determined for various conditions such as discharge pressure, suction pressure, motor voltage value, motor current value, motor rotation speed, etc., and normality is determined by comparing with each of these judgment parameters.・Determine abnormality.

0003

[Problems to be Solved by the Invention] However, in the past, various conditions of fire extinguishing equipment were not constantly monitored. In other words, various conditions are checked only during periodic inspections. For this reason,
Abnormalities occurring between regular inspection cycles cannot be detected. In addition, each sensor (including each judgment parameter) that detects abnormality and normality of various states during periodic inspections
It is conceivable to constantly monitor various conditions using a regular inspection sensor. However, if you try to perform constant monitoring using a sensor for periodic inspection, the determination parameter is fixedly set, for example, to a high level, so constant monitoring cannot detect an abnormality even if it is in an abnormal state. The problem arises that it cannot be done. For this reason, in the past, when attempting to perform constant monitoring, two types of sensors, a sensor for periodic inspection and a sensor for constant monitoring, were required, resulting in an increase in cost.

0004

[Means for Solving the Problems] The present invention has been proposed to solve the above problems, and it constantly monitors the normality and abnormality of various states of fire extinguishing equipment by comparing them with each judgment parameter, Required judgment parameters determined according to the type of test to be performed during periodic inspection are automatically changed when the test is executed.

[0005]

[Operation] Therefore, according to the present invention, various conditions of the fire extinguishing equipment are constantly monitored. Then, when the predetermined time is reached,
Periodic inspections are performed automatically. For example, if a pump shut-off operation test is performed during periodic inspection, various judgments will be made regarding various conditions such as discharge pressure, suction pressure, motor voltage value, motor current value, motor rotation speed, etc. Parameters are automatically changed.

[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. Moreover, the primary pressure regulating valve 10 is always in a state of regulating the pressure on the primary side of the valve 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. 3 is a schematic block diagram of a control device that controls automatic inspection of fire extinguishing equipment in this system. This control device 100 includes a CPU 100-1, a RAM 1
00-2, ROM100-3, input interface 1
00-4, an output interface 100-5, and a pressure gauge 19- to the input interface 100-4.
Various state information (pressure information, switch state information, current value information, rotation speed information, valve opening information, etc.) is provided from various sensors such as 1 to 19-6. Then, various commands are issued from the output interface 100-5 to various actuators such as the electric discharge valve 5, various devices such as the fire pump 2, etc. through processing by the CPU 100-1 according to a predetermined program.

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 pressure regulating valve 10.

Next, a periodic inspection that is automatically performed by the control device 100 in the fire extinguishing equipment that performs such basic operations will be explained.

The control device 100 constantly monitors the normality and abnormality of various states of the fire extinguishing equipment by comparing them with predetermined determination parameters. Under such circumstances, when a predetermined date and time are reached, a periodic inspection is automatically started. In this periodic inspection, test items such as a priming tank water reduction alarm test, a pressure tank test, a pump shut-off operation test, and a pump performance test are performed in a predetermined order.

FIG. 1 is a flowchart showing the process of a pump shut-off operation test performed during periodic inspection. Note that the electric discharge valve 5 and the primary pressure regulating valve 10 are already closed before entering this pump shut-off operation test.

When entering the pump shut-off operation test, first in step 101, the necessary determination parameters determined in accordance with the pump shut-off operation test are changed from constant monitoring to determination parameters corresponding to the pump shut-off operation test. For example, in constant monitoring, the determination parameters for the discharge pressure, suction pressure, motor voltage value, motor current value, and motor rotation speed of the fire pump 2 are set to "0.0 to 17.5 kg."
/cm2", "-1.0~4.0kg/cm2", "3
74.0~456.0V", "-5.0~5.0A",
It is set as "-50 to 50 rpm", and the primary pressure regulating valve 10
The determination parameter for the state of the flow switch 17 is set as "open", and the determination parameter for the state of the flow switch 17 is set as "off". These judgment parameters are the discharge pressure, suction pressure, motor voltage value,
For the motor current value and motor rotation speed, see “1.
0-18.5kg/cm2", "0.0-5.0kg/
cm2", "380-460V", "94.0-98.
0A" and "1430-1570 rpm," the state of the primary pressure regulating valve 10 is set as "closed," and the state of the flow switch 17 is set as "on."

After changing the required judgment parameters from constant monitoring to judgment parameters corresponding to the pump shut-off operation test in this manner, the process proceeds to step 102 to check whether the primary pressure regulating valve 10 is in the closed state. do. Here, the determination parameter regarding the state of the primary pressure regulating valve 10 has been changed from "open" to "closed" in step 101. Therefore, the control device 100 determines that the "closed" state of the primary pressure regulating valve 10 is normal, that is, the primary pressure regulating valve 10 is fully closed in addition to the electric discharge valve 5, and the discharge side of the fire pump 2 is in the closed state. After confirming that this is the case, a start command is output to the fire pump 2 (step 103). That is, according to the present embodiment, the state of the primary pressure regulating valve 10 is checked based on the output from a common sensor that detects the state of the primary pressure regulating valve 10 using the determination parameter "open" in the case of constant monitoring. , “Closed” for pump shut-off operation test.
It is checked using the determination parameter. In other words,
According to this embodiment, constant monitoring of the primary pressure regulating valve 10 in addition to periodic monitoring is realized without any erroneous determination without installing a new sensor for constant monitoring, and the cost reduction effect is extremely large.

The control device 100 also controls the fire pump 2.
Waiting for sufficient time for startup (step 104),
Proceed to step 105.

In step 105, the discharge pressure of the fire pump 2 is determined. Here, the determination parameter for the discharge pressure of the fire pump 2 is determined in step 101 as "0.0~
17.5kg/cm2” to “1.0~18.5kg/cm2”
cm2". Therefore, the control device 100 determines whether the discharge pressure is normal or not, using higher-level determination parameters than in the case of constant monitoring.
Determine abnormality. That is, according to this embodiment, the discharge pressure is checked by a low-level judgment parameter in the case of constant monitoring, based on the detection value from a common sensor that detects the discharge pressure, and is checked by a low-level judgment parameter in the case of the pump cut-off operation test. is checked by high-level decision parameters. In other words, according to this embodiment, constant monitoring of the discharge pressure in addition to regular monitoring is achieved without any erroneous determination without installing a new sensor for constant monitoring, and the cost reduction effect is extremely large.

When it is confirmed in step 105 that the discharge pressure is normal, it is confirmed in step 106 whether the flow switch 17 is in the "ON" state. Here, the determination parameter regarding the state of the flow switch 17 has been changed from "OFF" to "ON" in step 101. Therefore, the control device 100 determines that the flow switch 17 is in the "ON" state, that is, the connection pipe 12-4,
A state in which a predetermined amount of water is drained through 12-5 is determined to be normal.

After confirming the "ON" state of the flow switch 17 in step 106, the motor voltage value is determined (
Step 107) and determine the motor current value (Step 1
08), the motor rotation speed is determined (step 108), and the suction pressure is determined (step 110). Here, the determination parameters for the motor voltage value, motor current value, motor rotation speed, and suction pressure have been changed from constant monitoring to determination parameters corresponding to the pump cut-off operation test in step 101. As a result, constant monitoring of the motor voltage value, motor current value, motor rotation speed, and suction pressure can be realized without installing a new sensor for constant monitoring, in addition to periodic monitoring, without causing false judgments.

[0023] Thus, when it is confirmed in step 110 that the suction pressure is normal, the process proceeds to step 111 and the primary pressure regulating valve 10 is opened, assuming that each item of the pump shut-off operation test has been completed. After confirming that the primary pressure regulating valve 10 is open (step 112), the series of pump shut-off operation tests is completed (step 113).

After the pump shut-off operation test is completed, the necessary determination parameters changed in step 101 are returned to the determination parameters corresponding to the constant monitoring (step 114).

On the other hand, the control device 100 performs step 102.
, 105 to 110, 112, the primary pressure regulating valve 10 is opened in step 115, the electric discharge valve 5 is opened in step 116, the fire pump 2 is stopped in step 117, and the step At step 118, an inspection stop command is sent, and at step 119, the inspection signal and rotating light signal are turned off, and the abnormal state is transmitted to the upper level (step 120).

[0026] In the above, the pump cut-off operation test was explained as an example, but tests such as the priming tank water reduction alarm test, pressure tank test, and pump performance test are similarly determined according to the type of test. The required judgment parameters are automatically changed when the test is executed, and even if the judgment parameters for one state are different in many tests, there is no need for many types of sensors, further increasing the cost reduction effect. do. In addition, since judgment parameters that are not involved in the ongoing test are considered judgment parameters that are subject to constant monitoring, constant monitoring will continue for various conditions that are not related to the ongoing test. .

[0027]

[Effects of the Invention] As is clear from the above explanation, according to the present invention, the normality and abnormality of various states of the fire extinguishing equipment are constantly monitored by comparing them with each judgment parameter, and the types of tests performed during periodic inspections are Since the necessary judgment parameters determined according to the test are automatically changed when the test is executed, the sensor for periodic inspection and the sensor for constant monitoring are shared, and in addition to regular monitoring, the sensor for constant monitoring is Monitoring can be realized without erroneous judgments, promoting cost reduction.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the process of a pump shut-off operation test performed during periodic inspection performed by the control device shown in FIG. 3;

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

[Explanation of symbols]

100 Control device 100-1 CPU 100-2 RAM 100-3 ROM

Claims (1)

[Claims] 1. An automatic inspection device for fire extinguishing equipment that is capable of periodically automatically inspecting the fire extinguishing equipment based on various information from various sensors arranged in the fire extinguishing equipment, the apparatus being capable of automatically inspecting the fire extinguishing equipment on a regular basis, and determining whether various states of the fire extinguishing equipment are normal or abnormal. a constant monitoring means for always monitoring by comparing it with each judgment parameter, and a parameter changing means for automatically changing the necessary judgment parameter determined according to the type of test to be conducted in the periodic inspection when the test is executed. An automatic inspection device for fire extinguishing equipment, characterized by comprising: