JPH08280836A - Water discharge control device of fire engine - Google Patents

Abstract

PURPOSE: To provide a water discharge control device of a fire engine which can perform the control of the rate of flow of a discharge water safely without exposing the fireman at the hose tip to any hazard. CONSTITUTION: A water discharge control device of a fire engine is equipped with a pump 3, a rate-of-flow command means 72a to give a command of rate- of-flow control by emitting a flow-up signal or flow-down signal, a rate-of-flow control means 11 which enlarges the degree of opening of a flow regulating valve 54 upon receiving the flow-up signal and lessens the opening upon receiving the flow-down signal, and a pressure sensing means 31 which senses the current discharge pressure. The opening of an engine throttle is adjusted so that the current discharge pressure is retained at the initial set pressure which was predetermined, and if the valve is full open when the flow-up signal is fed, the set pressure is increased in steps at each time as updating, and the opening of the engine throttle is adjusted so that the current discharge pressure is retained at the updated set pressure, and the opening of the flow regulating valve furnished at other releasing port is controlled by a pressure control means 10 so that the rate of flow of the discharge water at other releasing port does not vary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire engine water discharge control device, and more particularly to a fire engine water discharge control device for performing water discharge of a fire engine under pressure control.

[0002]

2. Description of the Related Art Generally, water discharge control of a fire engine uses a flow meter provided at the discharge port to monitor the flow rate at the discharge port and adjust the discharge pressure on the pump side so that the flow rate becomes a desired flow rate. It is done by controlling.

[0003]

However, in the water discharge control in which the discharge flow rate is controlled by the discharge pressure as described above, the pump pressure changes each time in order to keep the flow rate constant.
Occasionally there were safety issues. For example, if the hose is stepped on by a tire of a vehicle passing through or the hose bends, the pump pressure will rise sharply to compensate for the decrease in the flow rate at the discharge port, and the sudden rise in pressure will react to the cylinder tip personnel. Could be harmed. In addition, when water is discharged from two lines, if the hose in one line is in the above-mentioned situation and the pump pressure rises, the flow rate of water discharge in the other line will become excessively large and it will be a hazard to personnel at the tip of the hose. It was sometimes over. Furthermore, the occurrence of such a situation is not only limited to the personnel at the tip of the cylinder, but also a great obstacle to the entire fire extinguishing work.

The present invention has been proposed in view of the above,
It is an object of the present invention to provide a fire engine water discharge control device capable of safely controlling the water discharge flow rate so as not to cause harm to the cylinder tip personnel.

[0005]

In order to achieve the above object, a fire engine water discharge control device of the present invention comprises a pump that discharges water at a discharge pressure according to the engine speed, and a flow rate up signal or a flow rate down signal. And a flow rate commanding means for outputting a flow rate control, and each time the flow rate up signal is received, the opening degree of the flow rate adjusting valve provided in the discharge port is increased to sequentially increase the water discharge flow rate, and the flow rate down signal is received Flow rate control means for decreasing the valve opening degree to sequentially reduce the water discharge flow rate, pressure detection means for detecting the current discharge pressure of the pump, and initial discharge with the current discharge pressure set in advance. First pressure control means for controlling the discharge pressure of the pump by adjusting the opening degree of the engine throttle so as to maintain the pressure, and if the valve opening degree is fully opened when the flow rate up signal is received, The constant discharge pressure is increased in steps to a new set discharge pressure, and the engine throttle opening is adjusted to control the pump discharge pressure so that the current discharge pressure is maintained at the new set discharge pressure. When the discharge pressure control of the pump is performed by the second pressure control means and the second pressure control means, the flow rate control valve provided at the other discharge outlet does not change so that the water discharge flow rate at the other discharge outlet does not change. And a third pressure control means for controlling the valve opening degree.

[0006]

As described above, according to the present invention, the discharge pressure of the pump is first maintained at the initial set discharge pressure, and the flow rate control at the specific discharge port is performed by the valve of the flow rate adjusting valve provided at the discharge port. Adjust by opening. Even if the flow rate adjustment valve is fully opened under the initial set discharge pressure and the flow rate is still insufficient, the initial set discharge pressure is updated in steps, and the valve opening is set again under the new set discharge pressure. Adjust to control flow rate. Then, the water discharge flow rate at the other outlet is kept constant by controlling the valve opening of the flow rate adjusting valve at the other outlet so that it will not be affected even if the set discharge pressure is updated. .

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing the overall configuration of a fire engine water discharge control device of the present invention. In the figure, the body 1 of a fire engine
A water discharge pump 3 is mounted near the center of the water discharge pump 3. The water discharge pump 3 is driven by the rotation of an engine 2 arranged in front of the vehicle body 1 via a shaft 27.

The water discharge pump 3 includes a water suction pipe 90 and a water discharge pipe 5.
0 and the water discharge pipe 60 are connected, and the vacuum pump 4
Is connected via an electromagnetic clutch 41 that connects and disconnects its rotation. Further, in the water discharge pump 3, a discharge pressure sensor 31 for detecting the pump pressure at the time of water discharge is provided in the vicinity of the check valve 3a, and the pump pressure is 1.5 to 2 on the water discharge side.
Each pressure switch 32 is provided to detect a kg / cm ² and output a detection signal.

The water suction pipe 90 is bifurcated toward two water suction ports 92 and 96 provided on both sides of the vehicle body 1 toward the rear, and the two water suction ports 92 and 96 are provided with a valve 9 for branching.
1, 95 are connected. Further, the water absorption tube 90 is
Further branch before the water inlets 92 and 96 to open the valve 9
Water inlets 98 and 100 are connected via 7, 99, respectively. At the time of natural water absorption, these water intake ports 92, 96
A water absorption pipe 93 for natural water absorption having a filter 94 attached to the tip thereof is connected to the. Further, at the time of relay water absorption, for example, a hose from an adjacent fire engine is connected to the water intake ports 98 and 100. A water absorption pressure sensor 97 for detecting the pressure during water absorption is provided in the middle of the water absorption pipe 90.

The water discharge pipe 50 is bifurcated toward two discharge ports 54 and 55 provided near the center of the right side of the vehicle body 1, and a flow meter (electromagnetic flow rate detector) 51 is provided at the discharge port 54.
And a flow rate adjusting valve 52, and to the discharge port 55 via a flow meter and a flow rate adjusting valve 53 not shown here. Further, the flow rate adjusting valve 52 can adjust the valve opening thereof by the electric motor 57,
Similarly, the valve opening of the flow rate adjusting valve 53 can be adjusted by an electric motor not shown here. At the time of water discharge, the nozzle 71a is provided at the tip of these discharge ports 54, 55.
The hose 70a to which is attached is connected.

Cylinder tip side of the hose 70a (nozzle 71a side)
Is provided with a flow rate control switch 72a so that the cylinder tip operator can remotely control the flow rate of water discharged from the nozzle 71a. As shown in FIG. 2, the flow rate control switch 72a includes an open button 721 for outputting a remote operation signal (pulse electric signal) for gradually increasing the valve opening degree of the flow rate adjusting valves 52, 53, and its valve opening degree. And a stop button 723 that outputs a remote operation signal that stops the movement of the valve.

Inside the hose 70a on the cylinder tip side, there is provided a sound wave transmitting portion 73a for converting a remote control signal from the flow rate control switch 72a into a sound wave signal and transmitting the sound wave signal.
The sound wave receiving portion 74a is provided inside the outlets 54 and 55 of 0a.
Is provided. The sound wave transmitting unit 73a is the flow rate control switch 7
The sound wave signal generated by converting the remote control signal from 2a is transmitted through the water inside the hose 70a to receive the sound wave receiving portion 74a.
After being converted back to an electric signal again, the signal is output to the receiver 13.

The other water discharge pipe 60 is bifurcated toward two discharge ports 64 and 65 provided near the center of the left side of the vehicle body 1, and a flow meter (electromagnetic flow rate detector) is provided at the discharge port 64. ) 61 and the flow rate adjusting valve 62, and the outlet 65
Are connected via a flow meter and a flow rate adjusting valve 63, which are not shown here. Further, the valve opening of the flow rate adjusting valve 62 can be adjusted by the electric motor 67, and similarly, the valve opening of the flow rate adjusting valve 63 can also be adjusted by an electric motor not shown here. . At the time of water discharge, a hose 70b having a nozzle 71b at its tip is connected to these discharge ports 64, 65, as in the case of the discharge ports 54, 55 described above.

As with the hose 70a, the hose 70b is also provided with a flow rate control switch 72b, a sound wave transmitter 73b and a sound wave receiver 74b, and the sound wave transmitter 73b.
The sound wave signal which is generated by converting the remote control signal from the flow rate control switch 72b is transmitted through the water inside the hose 70b and is converted back into an electric signal by the sound wave receiving section 74b.
It is output to the receiver 13.

Since the remote control signal is a sound wave signal for transmitting the water in the hose as described above, the signal can be surely transmitted without being affected by the surrounding environmental conditions. However, the transmission is not limited to the sound wave signal, and may be transmitted by a wireless signal in a place with good visibility, for example.

An operating lever 24 which is linked to an engine throttle (not shown) in a one-to-one relationship is connected to the engine 2 which drives the water discharge pump 3 to rotate.
Is provided with a throttle sensor 25 for detecting the operation angle of the operation lever 24 as the opening degree of the engine throttle. The operating lever 24 includes a motor 21 and a gear portion 2
2. The throttle drive unit 20 composed of the electromagnetic clutch 23 and the shaft 28 is connected, and the operating lever 24 is adapted to rotate in response to the rotation of the motor 21 via the gear unit 22 and the shaft 28.

A manual handle 28a is provided on each side of the shaft 28.
And 28b are attached, the electromagnetic clutch 23 is disengaged, and the shaft 28 is separated from the motor 21,
By rotating the manual handle 28a or 28b, the operation lever 24 can be manually rotated via the shaft 28. A shaft 27 connecting the engine 2 and the water discharge pump 3 is provided with a tachometer 26 for detecting the engine speed.

A pressure control device 10 for controlling the discharge pressure of the water discharge pump 3 and each discharge port 54 are provided near the rear of the vehicle body 1.
A flow rate control device 11 for controlling the flow rate of water discharged at 55, 64, 65 is provided. Each of the pressure control device 10 and the flow rate control device 11 is mainly configured by a processor (CPU), and performs various processes according to a program stored in the ROM to perform predetermined pressure control and flow rate control.

A flow rate control panel 14 and a pressure control panel 16 are provided between the outlet 54 on the right side of the vehicle body 1 and the manual handle 28a, and between the outlet 64 on the left side and the manual handle 28b. Is provided with a pressure control panel 18 and a monitor panel 19. Various signals when operating the flow rate control panel 14 are input to the flow rate control device 11, and various signals when operating the pressure control panel 16 are:
It is input to the pressure control device 10.

As shown in FIG. 3, the flow rate control panel 14 has a remote operation button 141 for switching the flow rate control to the remote operation mode, a hand operation button 142 for switching to the hand operation mode, and a flow rate control for not performing the flow rate control. An off switch 143 and lamps 144, 145, 146 for displaying the use state of them are provided.

The middle stage of the flow rate control panel 14 is a part for operating the flow rate at the outlets 54, 55 on the right side, and an open button 148 for gradually increasing the valve opening of the flow rate adjusting valves 52, 53. A close button 149 for gradually decreasing, a stop button 150 for stopping the movement of the valve, a display section 147 for displaying the usage state of them by a lamp, and the flow rate adjusting valve 5.
There is provided a valve opening degree display unit 151 which indicates the current valve opening degree when the pressures 2, 53 are expressed in six stages from fully closed to fully opened. Each time the open button 148 or the close button 149 is pressed, the valve opening degree operates in the opening direction or the closing direction by the next one step out of the six steps, and the display on the valve opening degree display section 151 changes accordingly. .

The lower part of the flow rate control panel 14 is a part for operating the flow rate at the outlets 64, 65 on the left side, and an open button for gradually increasing the valve opening of the flow rate adjusting valves 62, 63. 153, a closing button 15 that gradually decreases
4, the stop button 155 for stopping the movement of the valve, the display unit 152 for displaying the usage state of them, and the current valve opening when the flow rate adjusting valves 62, 63 are expressed in six stages from fully closed to fully opened. A valve opening degree display unit 156 is provided. Each time you press the open button 153 or the close button 154,
The valve opening operates only in the next one of the six steps in the opening direction or the closing direction, and the display on the valve opening display unit 156 changes accordingly.

By the way, the open button 1 for the right side described above.
48, a close button 149, and a stop button 150 are buttons 721, 72 of the flow control switch 72a for remote operation.
2, 723, and the left side open button 153, the close button 154, and the stop button 155 have the same functions as the buttons of the flow control switch 72b for remote operation. When the closing button 722 is pressed to close (fully close) the flow rate adjusting valve 52 and the like, the closing is not a complete closing but a closing that can secure a water amount capable of transmitting a sound wave signal.

As shown in FIG. 4, the pressure control panel 16 comprises a pumping control section 16a and a pressure control section 16b.
The pumping control section 16a includes an operation button 161, which operates the vacuum pump 4, a stop button 162 which stops the vacuum pump 4, and an operation lamp 1 which indicates that the vacuum pump 4 has operated and pumping has started.
63, a throttle position display lamp 168 for monitoring the opening of the engine throttle during pumping control, a pumping completion lamp 164 for notifying pumping completion, a pumping impossible lamp 165 indicating that pumping is not possible, and pumping is started. There is provided a timer 166 for monitoring the time from, and an emergency activation button 167 for manually pumping in an emergency.

Further, the pressure control section 16b has an automatic operation button 169 for automatically performing pressure control, a manual operation button 170 for manual operation, an automatic operation lamp 171 for displaying an automatic operation state, and a manual operation state. A manual operation lamp 172 to be displayed, a pressure setting dial 173 for changing the discharge pressure setting of the water discharge pump 3 with a dial, and a lamp check button 1 for checking lighting of various lamps.
74 is provided.

On the other hand, a pressure control panel 18 is also provided on the left side of the vehicle body 1. This pressure control panel 18 has the same structure as the pumping section 16a of the pressure control panel 16 as shown in FIG. Therefore, the description thereof is omitted here.
The reason why the pressure control section is not provided in the pressure control panel 18 is that
This is because the pressure control panel 16 on the right side serves as the main operation unit, and the pressure control on the left side can be performed by remote control from the tip of the hose 70, as will be described later in detail.

The monitor panel 19, as shown in FIG.
It is divided into a pressure control monitor unit 19a and a flow rate control monitor unit 19b. The pressure control monitor unit 19a is an automatic operation display lamp 1 that lights up when pressure control is automatically performed.
91, and a manual operation display lamp 192 that lights up when the flow is manually performed.
The remote operation display lamp 193 that lights up when the flow rate control is performed in the remote operation mode, the hand operation display lamp 194 that lights up when performing the flow rate control in the hand operation mode, and the flow rate adjusting valves 52 and 53 on the right side are all included. A valve opening display section 195 showing the current valve opening when it is expressed in 6 stages from closed to fully opened.
It consists of and. The left side monitor panel 19b is for accurately informing the operator on the left side of the operating status of the pressure control panel 16 and the flow rate control panel 14 on the right side, which function as a main operation unit.

Next, referring to FIG. 7, the fire engine water discharge control according to the present invention will be described in order. First, a power switch (not shown) provided near the driver's seat is turned on, and subsequently, when the operator turns on the operation button 161 of the pressure control panel 16, the pumping control is started. That is, when the pressure control device 10 receives the ON signal of the operation button 161, the pressure control device 10 drives the motor 21 to increase the rotation of the engine 2 and makes the electromagnetic clutch 41 contact to rotate the engine 2 to the vacuum via the water discharge pump 3. Tell pump 4 to operate both pumps at the same time.

When the vacuum pump 4 operates, the water suction pipe 90,
Water is sucked through 93 and the filter 94 to start pumping, and the operation lamp 163 is turned on. Upon receiving the pumped water, the water discharge pump 3 starts discharging, and the discharge pressure is 1.5 to 2 kg /
When the pressure reaches 32 cm ² , a detection signal is output from the pressure switch 32, and the electromagnetic clutch 41 is disengaged to complete the pumping, and the pumping completion lamp is turned on to notify the pumping completion. When the pumping is not completed within 30 seconds for some reason, the electromagnetic clutch 41 is disengaged in accordance with the operation of the timer 166 to stop the pumping, and the rotation of the engine 2 is also returned to idling.

Next, control on the discharge side of the water discharge when the pumping is completed will be described. First, the case where both the flow rate control and the pressure control are operating, that is, the case where the off switch 143 of the flow rate control panel 14 is not pressed and the automatic operation button 169 of the pressure control panel 16 is pressed will be described. The flow rate control panel 14 has a remote operation button 141 and a hand operation button 142, and both remote operation of performing the flow rate control from the cylinder tip and hand operation of performing the flow rate control panel 14 on the right side of the vehicle body 1 can be selected. Since the control contents are the same, the case of remote operation will be described here.

When the discharge pressure of the water discharge pump 3 increases and water discharge starts, the discharge pressure sensor 31 detects the discharge pressure at that time and outputs it to the pressure control device 10. Pressure control device 10
Adjusts the opening of the engine throttle so that the current discharge pressure is maintained at a preset initial setting pressure, for example, 5 kg / cm ² . It should be noted that this initial set pressure is set in advance to be equal to or higher than the minimum discharge pressure required for discharging water.

When the cylinder tip operator who is discharging water from the nozzle 71a of the hose 70a wants to adjust the flow rate while maintaining the discharge pressure at the initial set pressure, the cylinder tip person operates the flow control switch 72a for remote operation. The open button 721 is pressed to increase the flow rate, and the close button 722 is pressed to decrease the flow rate, and the press signal is sent via the receiver 13 and the interface 12 to the flow control device 11.
Output to. As described above, the flow rate adjusting valve 57 and the like are adjusted so as to have a six-step valve opening degree from fully closed to fully opened, and the flow rate control device 11 presses the open button 721 or the close button 722. Each time the signal is received, the valve opening is operated in the opening direction or the closing direction by one of the following six steps.

When the flow rate is still insufficient even when the valve opening is fully opened, if the cylinder tip worker presses the open button 721 once again, the flow rate control device 11 receives the pressing signal, and when the pressing signal is received. If the valve opening is fully opened, the set discharge pressure is increased stepwise, for example, by 1 kg / cm ² to obtain a new set discharge pressure (hereinafter referred to as “update set pressure”), and the updated set pressure is set. Send to the pressure control device 10.
In response to this, the pressure control device 10 adjusts the opening degree of the engine throttle so that the current discharge pressure is maintained at the updated set pressure, and controls the discharge pressure of the water discharge pump 3.

Then, every time the set discharge pressure is updated and the discharge pressure of the water discharge pump 3 is controlled to the updated set pressure, the discharge port 5 is opened.
The maximum flow rate at 4 (first outlet) also becomes large, and the flow rate at the first outlet is adjusted to 0 by adjusting the valve opening of the flow rate adjusting valve 57.
It becomes possible to control in 6 steps within the range of the maximum flow rate, and it becomes possible to secure an appropriate flow rate. The upper limit of the renewal set pressure is determined by the capacity of the water discharge pump 3, and can be raised to, for example, 15 kg / cm ² .

The set discharge pressure is always updated from a low value to a high value. This is because if the update is performed in the opposite direction, the control content becomes complicated and the discharge pressure and flow rate become unstable, which is unsuitable for fire extinguishing work that requires certainty.

By the way, when the pressure control based on the above-mentioned updated set pressure is performed to increase the discharge pressure of the water discharge pump 3, the water discharge flow rate at the left side discharge port 64 (second discharge port) also fluctuates and rises. Therefore, the flow rate control device 11 controls the valve opening degree of the flow rate adjusting valve 62 provided at the second outlet so that the water discharge flow rate at the second outlet does not change. That is, the flow rate immediately before the pressure control based on the updated set pressure is executed by the flow meter 61.
Is detected and the valve opening of the flow rate adjusting valve 62 is controlled so that the flow rate does not change.

As described above, the discharge pressure of the water discharge pump 3 is controlled to be constant to control the flow rate at the first discharge port, and when the flow rate is insufficient, the discharge pressure is sequentially increased to secure the flow rate. At the first outlet, water can be discharged at an appropriate flow rate under a stable discharge pressure. Further, since the flow rate at the second discharge port is kept constant, the flow rate at the second discharge port is not affected by the flow rate control at the first discharge port, and the second discharge port has a stable discharge pressure and an appropriate flow rate. Water can be discharged. Furthermore, since the discharge pressure of the water discharge pump 3 is stable and does not rise suddenly, it is possible to prevent a situation in which a cylinder tip worker is injured, and water can be discharged safely, and fire extinguishing work can be performed safely and securely. You will be able to.

When the flow rate control is off and the pressure control is on, that is, when the off switch 143 of the flow rate control panel 14 is pressed and the automatic operation button 169 of the pressure control panel 16 is pressed, the pressure control device 10 operates as a water discharge pump. The discharge pressure of No. 3 is controlled by the operator to a pressure set by the pressure setting dial 173 of the pressure control panel 16, for example, 7 kg / cm ² .

Manual operation button 17 of the pressure control panel 16
When 0 is pressed and the pressure control is also off, the operator can manually control the discharge pressure of the water discharge pump 3 by manually operating the operating lever 24 and adjusting the engine throttle. In this way, switching between the automatic operation mode and the manual operation mode can be performed with a single button, and it is possible to appropriately cope with various situations that occur during water discharge work.

When the discharge pressure detected by the discharge pressure sensor 31 suddenly drops for some reason during automatic operation under such pressure control, the engine throttle opening is adjusted so that the engine speed becomes idling. To control.
By doing so, automatic operation under pressure control can be safely performed.

Further, when the water absorption pressure sensor 97 detects that the water absorption pressure becomes a predetermined negative pressure or less, for example, -58 cmHg or less when sucking water by natural water absorption, when the water absorption pressure sensor 97 detects an appropriate position of the vehicle body 1, for example, a pressure. An alarm is provided by an alarm device provided near the control panels 16 and 18, and the motor 21
The opening of the engine throttle is maintained at the current opening through the. As a result, it is possible to prevent cavitation from occurring due to an abnormal negative pressure during water discharge, and it is possible to protect the water discharge pump 3 from cavitation.

Further, for example, when a hose from the adjacent fire engine is connected to the water inlet 98 or 100 to carry out relay water absorption, the water absorption pressure is below a predetermined positive pressure, for example, 1 kg / c.
Even when the water absorption pressure sensor 97 detects that the water pressure becomes m ² or less, an alarm is issued by the alarm device and the opening of the engine throttle is changed via the motor 21 at that time as in the case of the natural water absorption. Hold at the opening. This allows
It is possible to prevent the hose from denting due to the pressure drop inside the hose and making it impossible to absorb relay water.

In both cases of natural water absorption and relay water absorption, since the opening of the engine throttle is maintained at the opening at that time, whether the condition on the water absorption side should be improved even if an alarm is issued,
Alternatively, if the alarm is released by lowering the set pressure or the like, the discharge side can continue to discharge water automatically without being affected.

[0044]

As described above, according to the fire engine water discharge control device of the present invention, the discharge pressure of the pump is controlled to be constant to control the flow rate at a specific discharge port. Since the discharge pressure setting is increased sequentially to secure the flow rate,
Water can be discharged from the outlet at an appropriate flow rate under a stable discharge pressure. In addition, since the flow rate at other outlets is kept constant, water is discharged at a proper flow rate at other outlets under a stable discharge pressure without being affected by the flow rate control at the specific outlet. It can be performed. Furthermore, since the discharge pressure of the pump is stable and does not rise suddenly, it is possible to prevent the situation where the personnel at the tip of the cylinder is injured, water can be discharged safely, and fire extinguishing work can be performed safely and reliably. Like

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of a fire engine water discharge control device of the present invention.

FIG. 2 is a diagram showing a configuration of a flow control switch for remote operation.

FIG. 3 is a diagram showing a configuration of a flow rate control panel.

FIG. 4 is a diagram showing a configuration of a pressure control panel.

FIG. 5 is a diagram showing a configuration of a pressure control panel (left side).

FIG. 6 is a diagram showing a configuration of a monitor panel.

FIG. 7 is a block diagram relating to pressure control and flow rate control.

[Explanation of symbols]

 1 Fire Engine Body 2 Engine 3 Water Discharge Pump 4 Vacuum Pump 10 Pressure Control Device 11 Flow Control Device 12 Interface 13 Receiver 14 Flow Control Panel 16 Pressure Control Panel (Right Side) 18 Pressure Control Panel (Left Side) 19 Monitor Panel 21 Motor 24 Operation lever 31 Discharge pressure sensor 32 Pressure switch 50,60 Water discharge pipe 51,61 Flow meter 52,53,62,63 Flow rate adjustment valve 54,55,64,65 Discharge port 70a, 70b Hose 72a, 72b For remote control Flow control switch 73a, 73b Sound wave transmitter 74a, 74b Sound wave receiver 90 Water absorption pipe 93 Water absorption pipe for natural water absorption 97 Water absorption pressure sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koichi Takeuchi, 3-1-2 Kyobashi, Chuo-ku, Tokyo Inside Japan Machinery Industry Co., Ltd. (72) Atsuko Hirai 3-1-2, Kyobashi, Chuo-ku, Tokyo No. Japan Machinery Co., Ltd. (72) Inventor Takashi Yagazaki 1-13-20 Hatagaya, Shibuya-ku, Tokyo Inside Fire Research Institute, Tokyo Fire Department (72) Inventor Masakazu Yoneda 1-13 Hatagaya, Shibuya-ku, Tokyo No. 20 Tokyo Fire Department Fire Science Institute

Claims (8)

[Claims] 1. A pump that discharges water at a discharge pressure according to the engine speed, a flow rate commanding unit that outputs a flow rate up signal or a flow rate down signal to instruct flow rate control, and discharges each time the flow rate up signal is received. Flow rate control means for increasing the valve opening degree of the flow rate adjusting valve provided at the mouth to sequentially increase the water discharge rate, and decreasing the valve opening degree each time the flow rate down signal is received to sequentially decrease the water discharge rate; Pressure detection means for detecting the current discharge pressure of the pump, and controlling the discharge pressure of the pump by adjusting the opening of the engine throttle so that the current discharge pressure is maintained at a preset initial discharge pressure. If the valve opening is fully opened when receiving the flow rate up signal, the set discharge pressure is increased stepwise to obtain a new set discharge pressure. Second pressure control means for controlling the discharge pressure of the pump by adjusting the opening degree of the engine throttle so that the output pressure is maintained at the new set discharge pressure, and the discharge pressure of the pump by the second pressure control means. A third pressure control means for controlling the valve opening of the flow rate adjusting valve provided in the other outlet so that the water discharge flow rate at the other outlet does not fluctuate when the control is performed. Fire engine water discharge control device. 2. The fire fighting system according to claim 1, wherein the flow rate commanding means outputs the flow rate up signal or the flow rate down signal by remote control from the tip of the hose connected to the discharge port of the pump. Vehicle water discharge control device. 3. The flow rate up signal and the flow rate down signal output from the cylinder tip side of the hose are converted into sound wave signals to transmit water in the hose.
Fire engine water discharge control device described in. 4. The fire engine water discharge control device according to claim 1, wherein the initial set discharge pressure is equal to or higher than a minimum discharge pressure required for water discharge. 5. The discharge pressure control of the pump is switched between an automatic operation mode that is automatically performed and a manual operation mode that is performed by an operator manually adjusting an opening of an engine throttle to control an arbitrary discharge pressure. It is possible, The fire engine water discharge control apparatus of Claim 1 characterized by the above-mentioned. 6. The fire engine water discharge control device according to claim 1, wherein the opening degree of the engine throttle is controlled so that the engine speed becomes idling when the discharge pressure sharply decreases. 7. An alarm is issued when water absorption pressure falls below a predetermined negative pressure while water is being sucked up and supplied to the pump by natural water absorption, and the opening of the engine throttle is set to the opening at that time. The fire engine water discharge control device according to claim 1, which is held. 8. An alarm is issued when the water absorption pressure falls below a predetermined positive pressure while supplying water by relay water absorption to the pump, and the opening of the engine throttle is maintained at the opening at that time. The fire engine water discharge control device according to claim 1, wherein.