JP4334439B2 - Fire extinguishing equipment - Google Patents

Description

  The present invention relates to fire extinguishing equipment.

  In the parking lot, foam fire extinguishing equipment is installed in preparation for oil fires. This foam extinguishing equipment will be described with reference to Patent Document 1. FIG. 2 is a system diagram of a conventional foam extinguishing system. In FIG. 2, reference numeral 7 denotes a simultaneous opening valve, which includes a primary chamber 9, a secondary chamber 10, and a cylinder chamber 12. Each chamber 9, 10, 12 is partitioned by a valve body 11. A fire extinguishing pipe 17 having a plurality of foam heads 16 attached thereto is connected to the secondary chamber 10 of the simultaneous opening valve 7. The cylinder chamber 12 is connected to a sensing pipe 14 to which a plurality of sensing heads 13 are attached, and a manual activation valve 18 is provided at the end of the sensing pipe 14. A safety valve 20 is provided in parallel with the manual start valve 18. The safety valve 20 is a main component of the invention of Patent Document 1, and is not provided in normal equipment.

  A fire extinguishing agent source is connected to the primary chamber 9 of the simultaneous opening valve 7 through a pipe 8. The fire extinguishing chemical source is composed of a water tank 1, a pump 2, a stock solution tank 5, and a mixer 3, and water from the water tank 1 and foam stock solution from the stock solution tank 5 are mixed by the mixer 3 provided in the pipe 8. In addition, 4 is a pressure tank and 6 is a flowing water detection apparatus.

  In such a facility, when the sensing head 13 is opened due to the occurrence of a fire, the simultaneous opening valve 7 is opened due to the decompression of the sensing pipe 14, and the foam aqueous solution as a fire extinguishing liquid flows out to the foam head 16 side, and the foam head 16 releases bubbles.

When a pressure switch (not shown) attached to the pressure tank 4 detects a pressure drop in the pipe, the pump 2 is started by a control panel (not shown), and the water in the water tank 1 and the foam stock solution in the stock solution tank 5 are mixed by the mixer 3. After mixing at a predetermined ratio, an aqueous foam solution is supplied to the foam head 16 to extinguish the fire. When the foam aqueous solution flows through the secondary side pipe 8, the flowing water detection device 6 detects the flow and outputs a flowing water signal to a control panel (not shown).
JP-A-8-89594

  This foam fire extinguishing system must be inspected by law when it is completed or periodically after installation. The contents of the inspection are to actually release the foam from the foam head and measure the foam expansion ratio and the foam aqueous solution mixing ratio. At this time, in order to perform a simultaneous radiation test on each compartment of the simultaneous opening valve 7, the foam extinguishing agent is released from about 10 foam heads 16.

  For this reason, at the time of inspection, in order to actually release bubbles, it is necessary to carry out the curing in the parking lot in advance over a wide range, and it has been necessary to temporarily move the car or restrict parking. Moreover, since there was much radiation amount, there existed a problem that disposal processing, such as foam extinguishing agent after radiation | emission, took time.

The present invention has been made to solve the above problems, and a main pipe provided with a running water detection device, a fire extinguishing chemical source provided on the base end side of the main pipe, and having a stock solution tank, a mixer, and the like. in fire extinguishing installation comprising a a test pipe which is branched from between said water flow detection device and the fire extinguishing agent source of the main, along with connecting the open head for testing via the test valve closed constantly A pressure gauge is provided between the open-type head and the test valve, the test pipe is branched to connect a drain pipe , and an orifice is provided in the drain pipe.

Further, a secondary side pipe is provided on the secondary side of the main-stream water detection device, and a foam head or a foam spray head is connected to the secondary side pipe.

  In the present invention, in the foam-type fire extinguishing equipment, the test pipe branched from the main pipe is provided with the test open head through the normally closed test valve, and therefore the test open head is installed. The equipment can be tested in a compact space. Further, at the time of the test, only one head of foam or foam aqueous solution is discharged, so that the area after the discharge is small and the disposal process is not required.

  In addition, the drain pipe is provided with an orifice, and the test pipe is provided with a pressure gauge. By checking the value of the pressure gauge and adjusting the opening of the test valve, the flow rate flowing through the pipe can be ascertained. It is possible to check whether the flow rate is appropriate.

  FIG. 1 is a system diagram for explaining the fire extinguishing equipment of the present invention. 1 is different from the fire extinguishing facility described in FIG. 2 in that a test apparatus S is provided. The parts other than the test apparatus S are the same as those described in the prior art, and the same reference numerals are given to the same parts as those in the prior art and the description thereof is omitted.

  Reference numeral 22 denotes a main pipe provided with the flowing water detection device 6, and a fire extinguishing chemical source C is provided on the proximal end side of the main pipe 22. The fire extinguishing chemical source C is composed of a stock solution tank 5, a mixer 3, a pump 2 and a water tank (not shown). In the main pipe 22, a test device S is provided between the fire extinguishing chemical source C and the flowing water detection device 6.

  Next, the configuration of the test apparatus S will be described. A test pipe 24 is branched from the main pipe 22. An open test head 28 (hereinafter referred to as a test head 28) is connected to the test pipe 24 via a test valve 26 that is normally closed. Further, a drainage pipe 30 having an orifice 32 is branched and connected to the test pipe 24, the drainage pipe 30 is further connected to a drainage main pipe 34, and the drainage main pipe 34 is also connected to the flowing water detection device 6. Has been. Reference numeral 29 denotes a pressure gauge provided in the test pipe 24, which is provided at a mounting height position that can be visually recognized by an inspector. Further, in order to obtain an appropriate flow rate in the mixer 3 during the test with the test valve 26 opened, an orifice 32 having a pressure of 0.25 MPa and a flow rate of 80 L / min is used as an example. The

  Here, the test head 28 is the same as the foam head 16 installed in the protection section. The test head 28 (test apparatus S) is provided near the corner where there is no parking space or the like in a parking lot or the like. The mounting height of the test head 28 can be adjusted as appropriate, but it is lower than the mounting height of the normal foam head 16 and is set to an adult height or less, for example, a mounting height of about 180 to 120 cm from the floor surface. It is preferable.

  A secondary side pipe 8 is provided on the secondary side of the flowing water detection device 6 of the main pipe 22. In FIG. 1, the tip side of the secondary side pipe 8 is connected to a medicine radiating portion comprising a simultaneous opening valve 7 and a foam head 16 as in the conventional example. The part may be composed of a foam spray head comprising a closed head. In this case, the same open-type foam head as that used in FIG. 1 is used as the test head 28.

  Next, a test method in the present fire extinguishing equipment will be described. First, when starting the test, the test valve 26 is opened. Then, the foam aqueous solution in the main pipe 22 is radiated from the test head 28 through the test pipe 24. At this time, a part of the foam aqueous solution also flows into the drainage pipe 30 via the orifice 32 and is drained directly from the drainage main pipe 34 to a miscellaneous drainage tank or the like. Note that even if the test valve 26 is opened, the manual start valve 18 is not opened, so the simultaneous open valve 7 is not opened, so that the foam extinguishing agent is released only at a place where the test apparatus S is present. .

  The foam extinguisher radiated from the test head 28 is collected using a measuring instrument or the like, and it is confirmed whether the expansion ratio, the mixing ratio, etc. are appropriate. At this time, if the test head 28 is provided near the corner where there is no parking space in a parking lot or the like, the facility can be tested without moving the parked car. Further, if the mounting height of the test head 28 is set to a height lower than the adult's height, the area where bubbles are emitted on the floor surface is reduced, and the processing after the test is facilitated. It is convenient for collecting bubbles. Thus, in this fire extinguishing equipment, it becomes possible to perform a test in a space-saving space where the test head 28 and the test pipe 24 are installed.

  In order to collect the foamed foam so as not to contaminate the floor surface, the collecting mass placed on the floor and the test head 28 are connected with a cylindrical shooter made of vinyl or the like, You may make it collect a bubble in a mass.

  Note that there are cases where the flow rate passing through the mixer 3 is small and an appropriate mixing ratio cannot be obtained only with the flow rate emitted from the test head 28 with the degree of opening of the test valve 26 being small. Therefore, the flow rate is adjusted by adjusting the opening of the test valve 26 while checking the value of the pressure gauge 29 so as to obtain an appropriate flow rate. Here, the pressure can be adjusted depending on the degree of opening of the test valve 26, but since the opening (flow diameter) of the test valve 26 at that time is not known, the flow rate actually flowing can be measured (calculated). Can not.

  Therefore, what is important is the presence of the orifice 32 provided in the drain pipe 30. Since the flow passage diameter is constant through the orifice 32, the flow rate flowing there can be grasped by reading the pressure value of the pressure gauge 29. More specifically, when the flow rate flowing through the pipe is Q and the pressure is P, the following equation is established between the flow rate Q and the pressure P.

Q = K√P (K is a constant determined by the aperture)
At this time, by installing the orifice 32 in the drainage pipe 30, the K value can be fixed to a constant value, and the flow rate Q can be specified by the value of the pressure P.

  In the present embodiment, since the test pipe 24 is branched and connected from the primary side of the flowing water detection device 6 in the main pipe 22, the flowing water detection device 6 has no extinguishing agent even if the test valve 26 is opened. Will not flow. For this reason, since it is not necessary to operate the flowing water detector 6 carelessly, it is convenient for testing.

  In the present embodiment, the orifice is provided, but the orifice may not be provided, and the flow rate may be designed to be appropriate depending on the pipe diameter of the drainage pipe itself. A pressure gauge is provided to adjust the degree of opening of the test valve, but the opening position of the test valve that provides a flow rate with an appropriate mixing ratio is determined in advance, and the opening position is marked. Good.

  Note that it is desirable that the test apparatus S be provided in an inspection space having a locked door so that a person other than the inspection contractor cannot operate the test valve without permission. The inspection space can be combined with a place where the water flow detection device is provided.

It is a system diagram of the fire extinguishing equipment of the present invention. It is a system diagram of the conventional fire extinguishing equipment.

Explanation of symbols

1 water tank, 2 pump, 3 mixer, 4 pressure tank,
5 Stock solution tank, 6 Flowing water detector, 7 Open valve, 8 Secondary piping,
9 Primary chamber, 10 Secondary chamber, 11 Valve body, 12 Cylinder chamber,
13 sensing head, 14 sensing piping, 16 foam head,
17 Fire-fighting pipe, 18 Manual start valve, 20 Safety valve, 22 Main pipe,
24 test pipe, 26 test valve, 28 test head, 29 pressure gauge,
30 Drainage pipe, 32 Orifice, 34 Drainage main, tt

Claims (2)

In a fire extinguishing facility comprising a main pipe provided with a running water detection device, and a fire extinguishing chemical source provided on the base end side of the main pipe and having a stock solution tank, a mixer, etc.
An open head for testing is connected to a test pipe branched from between the flowing water detection device of the main pipe and the fire extinguishing chemical source through a normally closed test valve , and the open head and the Install a pressure gauge between the test valve and
A fire extinguishing system that is branched to the test pipe and connected to a drain pipe , and an orifice is provided in the drain pipe. Two provided secondary pipe to the primary side, firefighting equipment according to claim 1 Symbol mounting, characterized in that connecting the foam head or foam spray head to said secondary pipe of the water flow detection device of the main.

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