JPH0817836B2 - Fire pump automatic control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used for a fire pump driven by an internal combustion engine.

 The present invention relates to computer control of fire pumps.

The fire-fighting pump here is the one installed in a car,
Alternatively, the present invention relates to any device which is not mounted on a vehicle and is moved by other means.

〔Overview〕

In a control system for a fire pump driven by an internal combustion engine, computer control of the control procedure at startup and the control procedure for maintaining the discharge flow rate in a steady state enables accurate and safe control even at a fire site. It was done.

[Conventional technology]

Fire pumps that use an internal combustion engine as a prime mover have been used for a long time, but in principle, their control is done manually.
In the current system, the control or operation of fire pumps is carried out by a person called a specialized engineer who receives specialized education and is repeatedly and regularly trained. This will ensure reliable operation even under unpredictable and harsh conditions for the first time.

Some of the published Japanese patent applications or utility model registration applications relating to fire pumps include automation for testing or maintenance of fire pumps (Tokikai Sho 51-91).
002, JP-A-51-92402, JP-A-51-106201
Japanese Laid-Open Patent Publication), a device which carries out full-scale automatic control with a built-in microprocessor is not yet known.

On the other hand, a microprocessor is mounted on a general internal combustion engine to start and control the internal combustion engine in consideration of ambient temperature conditions and the like. Also, as for the water supply pump, an apparatus that performs servo control so that the discharge flow rate is constant is widely used in chemical plants and the like.

[Problems to be Solved by the Invention]

It is conceivable to apply these technologies to fire pumps, but even if they are applied to fire pumps as they are, they will not always be able to exhibit appropriate capabilities as fire pumps. Also, fire pumps cannot be automated uniformly.

That is, since the fire pump is used by moving to a fire site, its use condition is not constant, and in many cases, it must be used under extremely bad and severe environmental conditions. The ambient temperature varies significantly depending on the season or time, and in the case of a large fire, the heat generated by the fire. Naturally, the starting condition of the internal combustion engine differs depending on the temperature. In many cases, the internal combustion engine is once started and then stopped for some reason and then restarted. In that case, the starting condition is different because the temperature of the internal combustion engine is high. Conventionally, in such a case, appropriate control is performed according to the operator's judgment.

Water source conditions for fire pumps vary depending on the place of use. Therefore, a vacuum pump is installed alongside the fire pump in principle. If the water source is lower than the pump and there is no water pressure in the water source, the operator first starts the vacuum pump, depressurizes the water inlet of the water supply pump, and disconnects the vacuum pump after water discharge has started. is necessary.

In addition, the dischargeable flow rate differs depending on whether one person or two persons hold the tip of the water discharge hose. Currently, 400 / min for 1 person and 700 / for 2 persons
Although the outline such as minutes is provided, it is necessary to increase or decrease depending on the judgment depending on the condition of the scaffolding of the person holding it. That is, it is necessary to make room for artificial operation even if it is automated. Further, it is dangerous if the person holding the hose tip does not control the rate of increase or decrease of the flow rate so that the person holding the hose endures the recoil at the time of starting the discharge or changing the discharge amount.

Furthermore, since the length of the hose connected to the discharge port of the fire pump varies greatly depending on the situation at the fire site, automatic control for controlling a constant discharge flow rate is not always suitable.

Furthermore, since the fire pump is rarely used, it does not wear out, and once installed, it will be used for a long time, and control conditions may change due to deterioration over time.

The following problems have occurred in recent years regarding training. In other words, it is good in the urban area where a specialized fire station is installed, but a fire brigade who leaves the normal work to extinguish a fire in the event of a fire cannot take sufficient time for training. Furthermore, in recent years, many people also work in industries other than agriculture even in agricultural areas, and for daytime fires, there are no trained firefighters members, untrained housewives or elderly people operate fire pumps. There are often situations where you have to.

Even for trained and specialized engineer personnel, so-called human error often occurs in fire scenes in extremely difficult situations. In this case, it is possible that a calm operation cannot be continued, and if proper automatic control is performed, human error can be reduced.

The present invention has been carried out under such an environment, and by a simple operation, the internal combustion engine can be promptly and reliably and automatically started, and the flow rate of discharged water can be safely and surely. It is intended to provide a fire pump that can be controlled.

That is, the present invention can simplify the operation training, can be quickly and surely started up, and even if there is a difference in the use condition, the operator can automatically respond without being aware of it, and the number of water outlet holders As for the above, the simple and appropriate control is performed primarily to give a proper control, and the change of the water discharge amount does not cause a dangerous reaction to the holder of the water outlet, and the secular change is automatically performed. The purpose of the present invention is to provide a fire fighting pump.

[Means for solving the problem]

The first feature of the present invention is that a fire pump is provided with a program control circuit, and startup control means for automatically detecting a temperature condition and executing a predetermined startup procedure is provided.

Furthermore, the present invention can automatically set a safe and large flow rate by giving the number of persons holding the water discharge hose by operation.

Further, according to the present invention, when changing the water discharge flow rate, the value of the change per unit time is controlled so as not to exceed a predetermined value, and the safety of the person holding the water discharge hose can be secured.

[Action]

The program control circuit is programmed with a starting procedure of the internal combustion engine, which is equivalent to that executed by a trained operator. Program control procedures include ambient temperature detection, choke valve operation, throttle valve control according to rotation speed, use or non-use of a vacuum pump according to inlet pressure, and disconnection operation when a vacuum pump is used. It is executed automatically. This is done automatically based on one activation operation. Therefore, the operator does not have to undergo extensive training in adjusting control. Further, even a trained professional engineer can surely execute the operation by receiving the support of the automatic control under the difficult situation at the fire site.

The discharge flow rate is uniquely set to a safe value depending on the number of holders at the tip of the discharge hose. In addition, the water discharge flow rate can be changed by manual control, and when the flow rate is changed, a sudden change is made, and the holder of the tip of the water discharge hose is shocked.
Alternatively, the amount of change is automatically controlled to be safe so as not to be swung around.

Since the device of the present invention is in principle servo-controlled, even if the condition of the device is changed because it has not been used for a long time, it automatically responds and rescues it. be able to.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings. First
FIG. 1 is a schematic view of a fire fighting pump vehicle equipped with an apparatus according to an embodiment of the present invention. In the figure, an internal combustion engine 1 for driving a fire pump vehicle 30 has a structure in which a water feed pump 2 is driven by a rotary shaft 1C via a pump power transmission unit 1B incorporated in a transmission 1A thereof. The water supply pump 2 includes a water supply hose 3 that draws water from a water source 31 and a water discharge hose 4 that discharges water from the water supply pump 2. Further, an operation panel 15 is provided for the operator to control each part during fire extinguishing work.

FIG. 2 is a layout diagram of the operation panel 15, and FIG. 3 is a block configuration diagram of the apparatus of this embodiment.

Valve motor 6B and choke 6A for controlling the starter motor 5 of internal combustion engine 1 and the throttle valve of its carburetor 6.
The motor 8 for controlling the opening of the discharge valve 7 on the water discharge hose 4 side of the water supply pump 2 via the potentiometer 8A is controlled by the control circuit 16 mounted on the operation panel 15. As the detecting means, a rotation speed sensor 1E for detecting the rotation speed of the water supply pump 2 and a temperature sensor 1F for detecting the temperature thereof,
There are a vacuum pressure sensor 9 that detects the pressure on the water suction hose 3 side of the water supply pump 2, a discharge pressure sensor 10 that also detects the pressure on the discharge valve 7 side, and a flow rate sensor 11 that detects the discharge flow rate of the discharge valve 7. A vacuum pump 13 driven by a belt 1G provided on the rotary shaft 1C via a clutch portion 12 is provided when the pressure detected by the vacuum pressure sensor 9 exceeds a predetermined value when the water supply pump 2 is activated. There is.

Here, the feature of the present invention is that the control circuit 16 is
Based on a program stored in the memory 16B in advance by the processor 16A, the operator operates the memory panel 16C by operating the operation panel 15
Is a program control circuit for performing control by referring to the data written as necessary and the timer 16D, and by this program, the operator operates one start command, that is, by pressing the start switch S ₁ of the operation panel 15 1 is automatically started by the choke 6A and the starter motor 5, and the throttle valve of the carburetor 6 is moved to the valve motor 6B by referring to the detection output of the rotation speed sensor 1E.
Automatically operates the internal combustion engine 1 at a predetermined rotation speed, and after this operation is completed, the pump power transmission unit 1B operates the water feed pump 2 via the rotary shaft 1C, and the vacuum pressure sensor 9
When the pressure of the water intake port 2A detected at is less than a predetermined value, the clutch unit 12 is engaged and the vacuum pump 13 is activated to improve the vacuum degree of the water intake port 2A. And a flow rate control means for controlling the flow rate of the discharge port 2B, that is, the flow rate of the water discharge hose 4 to a predetermined set value according to the number of holders holding the water discharge hose and the holding state thereof. It is in.

 The following is provided as this flow rate control means.

That is, the operation panel 15 has a switch S ₂ and a switch S _{2 which} are operated when the number of persons holding the water discharge hose is one.
Switch S ₃ operated when the name is displayed, meters M ₁ and M ₂ for digitally displaying the set value and actual flow value of the flow rate respectively, and a spring return type increase push button to be pressed when increasing the set value. B ₁ and a spring-reset type reduction push button B ₂ that is pressed when decreasing the set value, and an increase lamp L ₂ that lights when the actual flow rate is increasing and that lights when the actual flow rate is decreasing A weight reducing lamp L ₃ and a weight equalizing lamp L ₄ that lights up when the actual flow rate is not changed are provided.

The set value displayed on the meter M ₁ is 450 / min for one holder and 700 / min for two as a standard value.
Minutes. However, the set value must be decreased depending on whether the holder is an immature person or when the holder's scaffolding is unstable. At this time, the operator presses the weight reduction push button B ₂ . As described above, the weight-reduction push-button B ₂ is a spring return type and can be operated by one-touch operation.
Per minute, and with 2 holders, the above set value decreases, such as 50 per minute. The changed set value is immediately displayed on the meter M ₁ . Therefore, the operator repeatedly presses the weight reduction push button B ₂ until the desired set value is reached. To increase the set value, press the increase push button B ₁ in the same manner.

In this manner, the processor 16A controls the valve motor to open / close the throttle valve of the carburetor of the internal combustion engine 1 and increase / decrease the opening of the discharge valve 7 so as to increase or decrease the actual flow rate by changing the set value. 6B and potentiometer 8A and motor 8 are controlled.

The magnitude of the flow rate change rate (unit: / sec / sec) when the water discharge rate increases or decreases is controlled so as to be proportional to the magnitude of the set value. For example, as described above, when the set value of the discharge flow rate is 400 / minute or 700 / minute, the predetermined value of the flow rate change rate is ± 2.67 / second / second, and when the actual flow rate increases or decreases according to the set value, The processor controls the opening degree of each of the throttle valve and the water discharge valve so that the change of the flow rate does not exceed 2.67 per second.
When the set value of the flow rate is changed from the value of 400 / minute or 700 / minute by the above-described increase or decrease operation, the predetermined value of the flow rate change rate is changed accordingly. For example, when a certain holder transfers water from a stable scaffold to an unstable scaffold, the operator changes the set value of the discharge flow rate to a small value with the weight reduction push button B ₂ . At this time, the flow rate discharged from the fire extinguishing pump decreases, but the decreasing rate of change in the flow rate at this time becomes smaller than the value when the scaffold was on a stable footing. Power is reduced and the owner is safe. Since the actual flow rate from the order is changed settings requires some time until the value, then the operator has been operated once flow changes, not after confirmed the lighting of Hitoshiryou lamp L ₄ , And the control circuit is interlocked so that the next change operation cannot be performed.

Next, the operation of the present embodiment will be described. After stopping the fire-fighting pump truck at the fire site, the operator confirms that the transmission is neutral, and then depresses the switch S ₀ on the operation panel 15 shown in FIG. 2 to turn on the preparation lamp L _0. To do. On the other hand, the processor 16A of the control circuit 16 checks the presence or absence of abnormality in each part, and if it determines that there is no abnormality, lights the start lamp L ₁ . If there is an abnormality, the processing method is displayed on the display unit DP according to the program in the memory 16B, and the operator performs processing for coping with this. The operator in the case of no abnormality is switch by the number of holders of the start switch S ₁ and the water discharge hose
Operate S _{2 and} S ₃ to display the set value on the meter M ₁ .
Next, depending on the scaffolding of the holder, etc., the increase push button B ₁ or the decrease push button B ₂ is appropriately pressed to change this set value.

By such a starting operation, the fire pump automatically operates.

First, the elapsed time after the last use of the internal combustion engine 1 is fetched from the timer 16D of the control circuit 16 and the temperature thereof is measured by the temperature sensor 1
Reading from F, the choke 6A and the starter motor 5 are controlled under these conditions to start the internal combustion engine 1, and the valve motor 6B is used to control the slot valve of the carburetor 6 by referring to the output of the rotation speed sensor 1E. It shall be the rated value of the rotation speed of 1. On the other hand, the pressure at the water inlet 2A of the water supply pump 2 is always measured by the vacuum pressure sensor 9. At first, this pressure is −0.1 Kg / cm ² or more in gauge pressure, that is, −0.1 Kg / cm ²
Since it is G or more, the clutch portion 12 is connected and the vacuum pump 13 is driven by the rotating shaft 1C via the belt 1G to make the water suction port 2A a strong vacuum state so that water can be easily sucked. The water absorbed in this way is pressurized by the water supply pump 2 and discharged. The water supply pump 2 is controlled to increase the discharge flow rate according to the flow rate change rate determined by the set value set as described above. With this processor 16A displays the detected value of the flow rate sensor 11 to the meter M ₂ as an actual flow rate, switch S _2, S _3, each pushbutton
In order to increase or decrease the actual flow rate according to a predetermined flow rate change rate so that it becomes the set value set by B ₁ and B ₂ , the opening of the throttle valve of the carburetor 6 is changed to the valve motor.
The valve opening of the discharge valve 7 is controlled by the motor 8 via the potentiometer 8A while being controlled by 6B. When the actual flow rate becomes substantially equal to the set value in this way, the equalizing lamp L ₄ is turned on and the flow rate is monitored so as to be uniform until there is an instruction to change the next set value. In the case of extinguishing the fire, when the start switch S ₁ is opened, the water discharge is stopped by the operation reverse to the above order, and the internal combustion engine is automatically stopped.

FIG. 4 shows a control flow chart of the apparatus of this embodiment. In the figure, the code in each logical symbol is Q ₀ = the initial setting value or the changed setting value and the meter M ₁
Displayed value (/ min) Q ₁ = Flow rate before automatic adjustment (/ min) Q ₂ = Throttle opening by valve motor 6B by processor in minute time Δt ΔT ₁ (ΔT ₁ / △ t) open and motor 8
Closed at the opening _{D 1 (△ D 1 / △} t) open operation, or similarly closed and discharge valve in the throttle _{△ T 1 / △ t △ D} 1 / △ t at in the discharge valve short time △ t Flow rate (/ min) after automatic adjustment of any of the above operations S _q0 = predetermined value (/ sec / sec) determined by the program of flow rate change rate S _q = calculated by the processor by flow rate Q ₁ and Q ₂ Flow rate change rate (/ sec / sec) ΔT ₂ , ΔD ₂ = Throttle and discharge valve minute time when adjusting the rate of flow rate change ΔT ₂ <△ T ₁ , depending on opening or closing of Δt There is a relationship of ΔD ₂ <ΔD ₁ .

〔The invention's effect〕

As described above, according to the present invention, even if there is no operator who is skilled in the start-up operation of the fire pump, the start-up is performed safely and surely, the water discharge adjustment is properly performed, and the end-time adjustment is performed. The operation of is also performed safely. Therefore, there is an effect that the initial fire extinguishing can be effectively executed, the spread of the fire can be prevented, and the safe fire extinguishing activity can be executed even in an area crowded like a city fire.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an embodiment of the present invention. FIG. 2 is a layout view of the operation panel of the same embodiment. FIG. 3 is a block diagram of the same. FIG. 4 is also a control flow chart. 1 ... internal combustion engine, 1A ... transmission, 1B ... pump power transmission section, 1C, 13A ... rotation shaft, 1D ... transmission gear position sensor, 1E ... rotation speed sensor, 1F ... temperature sensor , 1G ……
Belt, 2 ... Water supply pump, 2A ... Water inlet, 2B ... Discharge port, 3 ... Water absorption hose, 4 ... Water discharge hose, 4A ... Nozzle, 5 ... Cell motor, 6 ... Vaporizer, 6A ... … Choke, 6B …… Valve motor, 7 …… Discharge valve, 8 …… Motor, 8A …… Potentiometer make, 9 …… Vacuum pressure sensor,
10 …… Discharge pressure sensor, 11 …… Flow sensor, 12 …… Clutch section, 13 …… Vacuum pump, 15 …… Operation panel, 16 …… Control circuit, 16A …… Processor, 16B, 16C …… Memory, 16D
...... Timer, 30 …… Fire pump car, 31 …… Water source, 32 ……
Battery, B ₁ ...... Increase push button, B ₂ ...... Decrease push button,
IS …… Ignition switch, L ₀ …… Preparation light, L ₁ …… Start light, L ₂ …… Increase light, L ₃ …… Decrease light, L ₄ …… Weighing light,
M ₁ , M ₂ …… Meter, S ₀ , S ₂ , S ₃ …… switch, S ₁ …… Start switch.

Claims (2)

[Claims] 1. A control circuit including means for controlling a throttle valve of an internal combustion engine that drives a water supply pump and means for electrically controlling an opening of a discharge valve of the water supply pump, and rotation speed information of the internal combustion engine, An automatic control device for a fire pump, comprising: a detector for electrically detecting pressure information of a water intake of the water supply pump, pressure information of a discharge port of the water supply pump, and flow rate information of the discharge port. Is a program control circuit, means for executing the startup procedure of the internal combustion engine by the operation of one startup command, means for controlling the flow rate of the discharge port to a predetermined set value after the startup of the internal combustion engine, Means for setting the set value uniquely depending on the number of persons holding a hose connected to the tip of the discharge port. 2. A control circuit including means for controlling a throttle valve of an internal combustion engine for driving a water supply pump and means for electrically controlling an opening of a discharge valve of the water supply pump, and rotation speed information of the internal combustion engine, An automatic control device for a fire pump, comprising: a detector for electrically detecting pressure information of a water intake of the water supply pump, pressure information of a discharge port of the water supply pump, and flow rate information of the discharge port. Is a program control circuit, which comprises means for executing the startup procedure of the internal combustion engine by operating one startup command, and means for controlling the flow rate of the discharge port to a predetermined set value after the startup of the internal combustion engine. When the flow rate of the discharge port is changed, the program control circuit includes means for controlling the value of the change per unit time so as not to exceed a predetermined value. Automatic control device for fire pump.