JPS62102774A - Water discharge amount control apparatus in fire engine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a water discharge amount control device for a fire engine that can control the amount of water discharged depending on the fire situation.

b. Conventional technology In firefighting operations using fire engines, etc., it is necessary to control the amount of water sprayed depending on the situation at the fire scene.

For this reason, it is usually communicated to the person in charge on the vehicle side by radio communication or firefighter communication, for example,
The amount of water supplied to the fire hose is controlled by limiting the amount by which the accelerator is pressed.

Problems to be Solved by the C0 Invention However, in the event of a fire, approximately four fire hoses are used from one fire engine per -S, so the total number of fire hoses is large. This resulted in radio interference or a shortage of firefighters, and it was difficult to properly communicate the situation from the scene to the personnel on the vehicle side.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a water discharge amount control device for a fire engine, which allows a firefighter at the scene to control the amount of water discharged by himself or herself according to the situation at the scene.

d. Means for Solving the Problems The present invention comprises: a transmitter provided on the nozzle side of a fire hose and selectively outputs two types of signals by actuation of a switch; and a transmitter provided on the fire engine side. , comprising a receiving section that compares the output signal with a reference signal and determines which signal it is, and a driving section that controls the amount of water discharged based on the signal from the receiving section, and the transmitting section and the receiving section are connected to each other. The reason is that the fire hose is connected by a single cable built into the fire hose.

e. Action: A firefighter holding a nozzle attached to the end of a fire hose presses a switch depending on the situation at the scene. As a result, one of the two types of signals is output from the transmitter. This output signal is manually input to a receiving section provided on the fire engine side, and is compared with a reference signal by a discriminating section.

If it is determined that the signal is any one of the signals, the drive unit is operated while the switch is pressed. In this way, the amount of water discharged is controlled by adjusting the water pressure or amount of water by operating the drive unit.

f. Examples Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

The drawing is a block diagram showing a water discharge amount control device for a fire engine according to the present invention.

In the figure, 1 is a transmitting part provided in the nozzle part of a fire hose, 2 is a receiving part provided on the fire engine side, and the transmitting part 1 and the receiving part 2 are connected to a single conveyance guide such as a cable. Connected by wA3.

The transmitting section 1 includes a changeover switch 5 connected to a power source 4 for the transmitter such as a dry battery, and a square wave transmitter 6 connected in parallel with each other and connected to the power source A4 by operating the changeover switch 5.
．． 7, and a carrier wave oscillator 8 which is commonly connected to these oscillators 6 and 7 and outputs a carrier wave. The square wave oscillators 6, 7 each output square waves of different frequencies, and modulate the frequency of the carrier wave oscillator 8 with the square waves of each frequency.

On the other hand, the receiving section 2 receives the modulated carrier wave through one carrier conductor 3, and the receiving section 2 determines whether the input carrier wave is one of the modulated waves. The driving circuit 1 is configured to include a determining section 9 that performs the determination, and a drive circuit 1) that drives the drive motor 10 based on the operation of the determining section 9.

The determining unit 9 includes an integrating circuit 12 that integrates a modulated wave, a rectifying circuit 13 that rectifies this modulated wave, and a reference voltage generating circuit 14.
The comparison circuit 15 compares the reference voltage of the modulated wave with the voltage of the modulated wave.

The drive unit 1) is composed of a drive circuit 16 that drives a drive motor IO using an output signal from a comparison circuit 15. The drive circuit 16 controls the opening amount of the water supply pulp or the pedaling amount of the engine, that is, the opening amount of the throttle valve. 17 is a DC constant voltage power supply.

Next, the operation of the water discharge amount control device will be explained.

When a firefighter at the fire scene puts the changeover switch 5 attached to the nozzle part on the side of the square wave transmitter 6, the square wave transmitter 6 and the carrier wave transmitter 8 are activated.

At this time, as shown in FIG. 2, the carrier wave a of the carrier wave oscillator 8
(αMHz) to the square wave b (8KHz) of the square wave oscillator 6
) and carries the modulated wave C.

When the changeover switch 5 is turned on to the square wave oscillator 7 side, the square wave oscillator 7 and the carrier wave oscillator 8 are activated.

At this time, as shown in FIG. 3, the carrier wave a of the carrier wave oscillator 8
(αMHz) to the square wave b (βKHz) of the square wave oscillator 7
) and carries the modulated wave C.

For example, when the modulated wave C shown in FIG. 2 is input to the receiving section 2, the modulated wave C is inputted to the comparator circuit I5 via the integrating circuit 12 and the rectifying circuit 13. The comparison circuit 15 compares the voltage of the modulated wave C with the reference voltage from the reference voltage generation circuit 14, and determines which modulated wave it is. and,
This output signal is input to the drive circuit 16, and the drive motor 1
0 in the forward or reverse direction. As a result, the water supply valve is driven in the opening or closing direction, and the amount of water supplied increases or decreases. Furthermore, when the drive motor 10 is directly connected to the throttle valve of the engine, its opening degree is controlled, the water pressure rises and falls, and the amount of water supplied increases or decreases.

Therefore, if the drive motor 10 is set to rotate forward in the case of the modulated wave C and to be rotated in the reverse direction in the case of the modulated wave C', water can be supplied by pressing the selector switch 5 in either direction. It is possible to increase or decrease the amount.

g. Effects of the Invention As described above, according to the water discharge amount control device for a fire engine according to the present invention, the amount of water discharged can be controlled according to the situation at the fire scene at the discretion of the firefighter at the fire scene. Therefore, fire extinguishing activities can be carried out in accordance with the fire situation.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a water supply amount control device for a fire engine of the present invention, and FIGS. 2 and 3 are waveform diagrams showing waveforms of each part of the water supply amount control device of FIG. 1. 1... Transmitting section, 2... Receiving section, 3... Conveying conductor, 4... Power source, 5... Changeover switch, 6, 7... Square wave transmitter, 8... Carrier wave oscillator, 9... Discrimination unit, 10... Drive motor, 1)
···Drive part. Patent applicant: Teikoku Senki Co., Ltd., Kyoden Kogyo Co., Ltd. (and 2 others) Figure 3

Claims (3)

[Claims] (1) A transmitter is provided on the nozzle side of the fire hose and selectively outputs two types of signals by operating a switch, and a transmitter is provided on the fire engine side and compares the output signal with a reference signal and selects one of the two types of signals. A single conveying lead wire comprising a receiving section that determines whether the signal is a signal of A water discharge amount control device for a fire engine, characterized in that the water discharge amount control device is connected as follows. (2) The water discharge amount control device for a fire engine as set forth in claim (1), wherein the drive unit opens and closes a water supply valve to adjust the water supply amount to control the water discharge amount. (3) The amount of water sprayed in the fire engine according to claim (1), characterized in that the drive unit adjusts the opening degree of the throttle valve of the engine and increases or decreases the water pressure to control the amount of water sprayed. Control device.