JPS6027799A - Apparatus for displaying operation of engine pump - Google Patents

Abstract

PURPOSE:To make possible the operation till quick and positive water-drainage, by displaying operation steps on a monitor using the main switch of an engine pump, an engine rotation detecting sensor, an operation sensor for a vacuum pump, and a water supply completion detecting sensor. CONSTITUTION:An engine 3 is provided with a main switch 10 for change over the operation mode of off-start, and a magnet 12 serving as a detecting sensor for detecting the rotation of the engine. Further, a water-raising pump 4 is provided with a water absorption completion sensor 13 for sensing the pressure of water raised by the water sucking action of a vacuum pump 5 and is also provided with a sensor for detecting the action of the vacuum pump 5 in the vicinity of a clutch 15 for connecting or disconnecting a belt transmission mechanism 14 for driving the vacuum pump 5. The outputs of these sensors are displayed on a monitor panel 22 attached on the upper side surface of a fuel tank 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation display device for an engine pump, and more particularly, to an operation display device for an engine pump, which lights up to display each operation step from a state ready for operation to a state ready for water discharge of an engine pump used in a water cannon pump for firefighting, etc. About things/things.

A known engine pump as described above is equipped with an engine-driven water pump and a vacuum pump that sucks water into the water pump, and the water pump discharges water after the vacuum pump completes water suction. Such engine pumps are widely used as portable fire pumps. By the way, when looking at the environment in which such an engine pump is used, that is, in the field of firefighting activities, not only speedy work is required in the event of an emergency, but also reliability of work is required. In this case, conventionally, the operator relied on the operating sounds of the vacuum pump, water pump, engine, etc., to confirm each step of operation from the engine pump's ready state to the water-spraying state, and then performed the operations up to the water-spraying stage. The current situation is that it is difficult to recognize the operating sound of engine pumps at noisy firefighting sites, so we hope that those who are inexperienced in handling the work will be able to quickly and reliably perform each step of water discharging. The problem was that there was no.

The present invention has been made to solve the above problem, and provides an engine pump operation display device that allows even those who are inexperienced in handling engine pumps to quickly and reliably perform each step of water discharging. The purpose is to provide.

For this purpose, the present invention provides a detection means in the engine pump as described above, which includes a main switch of the engine pump, a sensor for detecting engine rotation, a sensor for detecting operation of the vacuum pump, and a sensor for detecting completion of water supply. and sends the signal from this detection means to a monitor circuit,
This system is characterized in that each operation step from the engine pump preparation state to the water discharge ready state is displayed by lighting the monitor circuit.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be specifically described below based on an embodiment shown in the drawings.

FIG. 1 shows the overall schematic configuration of an engine pump 1 to which the present invention is applied, and includes an engine 3 installed on an underframe 2, a water pump 4 and a vacuum pump 5 numbered in dark blue on this engine 3. The water pump 4 is directly connected to and driven by an output shaft (not shown) of the engine 3, and the vacuum pump 5 is configured to be transmitted to the output shaft via a belt transmission mechanism (described later). When the vacuum pump 5 is operated, it sucks water while removing air from the water pump 4, and then the water pump 4 discharges water. In FIG. 1, Hakama No. 6 is a battery for the engine pump 1, 1 is a hill motor for starting the engine 3 which is supplied with power from the battery 6, 8 is a fuel tank disposed above the engine 3, and 9 is an oil tank.

The engine 3 also includes a main switch 10 for switching the on/off/start operation mode of the engine 3 as shown in FIG. 11, and in addition to this magneto 11, a detection magnet 12 as a sensor for detecting engine rotation is attached.

The detection magnet 12 also functions as a charger for the battery 6 and a dynamo for lighting a searchlight or the like. Furthermore, the water pump 4 is equipped with a pressure switch 1 which is turned on by the pressure of the water lifted by the suction action of the vacuum pump 5.
3 is provided as a water absorption completion detection sensor. Also,
A limit is provided near the tension clutch 15, which connects and disconnects the belt transmission mechanism 14 for driving the vacuum pump 5, so as to be engaged and activated based on the connection operation of the control lever 16, which performs the connection and disconnection operation. A switch 1γ is arranged, and this limit switch 17 constitutes an operation detection sensor for the vacuum pump 5. And these main switches 10
．． Detection magnet 12. Pressure switch 13. In addition to the operating step detection means for the engine pump 1, which is the limit switch 17, a detection means for warning of abnormal operation of the engine 3 and the like is provided. That is, the oil tank 9 is a cock that is opened and closed in synchronization with the engagement and disengagement of the tension clutch 15 by rotation of the operating lever 16 in order to lubricate the vane sliding contact portion of the vane type vacuum pump 5. The oil float switch 19 is connected to the vacuum pump 5 via the oil tank 9, and is provided with an oil float switch 19 for detecting a decrease in oil in the oil tank 9 in order to reliably prevent seizure of the sliding contact portion of the vane. Similarly, the fuel tank 8 is equipped with a fuel float switch 20 that detects a decrease in fuel, and the battery 6 is equipped with a fuel float switch 20 that changes the strength of the output voltage depending on the increase or decrease of the part that is saturated with electrolyte. Each battery sensor 21 is provided to detect the level of the electrolyte.

On the other hand, on the upper side surface of the fuel tank 8, a case 23 is provided which has a monitor panel 22 for displaying the detection results by the detection means constituted by the various switches and the like. As shown in FIG. 3, this monitor panel 22 has four display boards 24 to 21 arranged vertically and horizontally in the center, and four display boards 28 to 21 arranged in a circle surrounding these. 31. The four display boards 24 to 27 in the center have a mark indicating an abnormality in the battery O, a mark indicating a decrease in fuel, a mark indicating a decrease in oil, and a mark indicating a lack of engine cooling water. Monitor marks are provided, and light emitting diodes e to : are arranged for lighting up and displaying the monitor marks. Furthermore, four display boards 28 to 31 arranged in a circle around these display the respective operation steps of the engine pump 1, such as "Preparation", "Start", and "Suction".

The letters "J" are arranged in chronological order, and light emitting diodes a to d are arranged correspondingly to indicate each step of the operation.

A circuit shown in FIG. 4 is constructed between the light emitting diodes a to 1 in order to display the light-emitting diodes a through 1 based on the operation of various switches constituting the detection means.

The Yamakari-go M in FIG. 4 is a monitor circuit formed on a printed circuit board housed in the case 23 and having eight contacts A to L. In addition to M, a lamp L for illuminating an operation panel (not shown) is connected to the connection terminal C. Here, each of the connection terminals A to H and various switches constituting the detection means are connected. To explain the connection state, first, the battery 6 has its child terminal connected to the connection terminal A through the fuse 32, the switch contact 10a that closes when the main switch 10 is in the on position and the start position, and the overvoltage cutoff filter 33. One terminal is the filter 3
By being connected to the ground side of No. 3 and the connection terminal B, a power supply voltage is supplied to the monitor circuit M. Also,
A drive circuit for the starter motor 7 is constructed between the →- terminal and one terminal of the battery 6, in which the starter motor 7 and a switch contact 10b, which is closed at the start position of the main switch 10, are connected in series. Then, the child terminal side of the battery 6 that has passed through the switch contact 10a is connected to the connection terminal E through the pressure switch 13, and the one terminal side is connected to the limit 1 through the switch 11 to the connection terminal E, and the fuel float switch 20. are connected to the connection terminal G through the oil float switch 19, and to the connection terminal H through the oil float switch 19. As a result, the water absorption completion signal from the vacuum pump 5 is sent to the connection terminal E, and the vacuum pump is sent to the connection terminal E. 5, a fuel decrease detection signal is provided to the connection terminal G, and an oil decrease detection signal is provided to the connection terminal I''. Furthermore, the detection magnet 12 is
It is connected to the child terminal of the battery 6 via the diode 34 to perform a charging function, and is connected to the connection terminal C to light the lamp L, and at the same time supplies a voltage as a rotation detection signal of the engine 3 to the monitor circuit M. It looks like this.

Further, a battery reliever 21 is connected to a connection terminal F of the monitor circuit M to provide a detection signal for detecting a decrease in electrolyte in the battery 6. Note that Yamakari 35 in Fig. 4 is a spark plug connected to the magneto 11, and the magneto 11 is short-circuited through a switch contact 10c that closes only when the main switch 10 is in the OFF position, and when the main switch 10 is in the ON or start position. It is now possible to spark with.

Next, monitor circuit Mti--to explain, this is a power supply circuit 36 for lighting each light emitting diode a to 1.
This power supply port W136 is connected to the connection terminals A and B through noise filters 37 and 38, respectively, in order to connect to the battery 6, and its output side is connected to each of the light emitting diodes a to i. .

Of these groups of light emitting diodes, those indicated by reference numerals are connected to the connection terminal Hk: via a noise filter 39 on their ground side, and those indicated by reference numeral g are connected via a similar noise filter 40. Its ground side is connected to the connecting terminal G, and when the oil flow switch 19 is opened, the light emitting diode 1) is connected to the fuel float switch 20.
When the light emitting diode 0 is opened, each light emitting diode 0 is turned on.

Further, the other light emitting diodes a to f, 1 have their ground sides connected to a driver circuit, which will be described later.

Here, the monitor circuit M includes a voltage conversion circuit 41 that is operated by being supplied with power from the power supply circuit 36, a reference voltage generation circuit 42, two comparison circuits 43 and 44, and a voltage detection circuit 4.
5, a decoder circuit 46, and a driver circuit 41 are provided. The voltage conversion circuit 41 has its input side connected to the connection terminal C via a noise filter 48,
The electromotive force of the detection magnet 12 is applied to cut the overvoltage region, and input voltage fluctuations are converted into corresponding low voltage fluctuations and output. Further, the input side of the reference voltage generation circuit 42 is connected to the output side of the power supply circuit 36.
Then, the voltage supplied from the power supply circuit 36 is adjusted to a predetermined reference voltage to be supplied to comparison circuits 43 and 44, which will be described later. The comparator circuit 43 has its input side connected to the power supply circuit 36 and the reference voltage generation circuit 42 in order to compare the voltage of the battery 6 outputted from the power supply circuit 36 with the reference voltage outputted from the reference voltage generation circuit 42. However, its output side is connected to a driver circuit 47 for the light emitting diode f, so that when the battery voltage falls below a specified value, it is output to the driver circuit 47. The driver circuit 47 is composed of a set of NOT circuits connected to each of the light emitting diodes a to f and i, and when a signal is input to each NOT circuit, the corresponding light emitting diode is turned on. When a signal is output from the comparator circuit 43 as described above, the light emitting diode f connected thereto is lit by the action of the circuits 1 to 1 which receive the signal.

The other comparison circuit 44 is connected to its input side in order to compare the reduced output voltage of the magneto 12 outputted from the voltage conversion circuit 41 and the reference voltage outputted from the reference voltage generation circuit 42. is connected to the voltage conversion circuit 41 or the reference voltage generation circuit 42, and its output side is connected to the decoder circuit 4.
6 to the driver circuit 47, and outputs to the decoder circuit 46 while the engine 3 is started and the magnets 1 to 12 are generating a predetermined electromotive force.

The decoder circuit 46 has a circuit configuration as shown in FIG. 5 with an inverter and a logic gate, and includes light emitting diodes a,
This is for selectively lighting up b, c, and d in time series, and one of its inputs is connected to the comparator circuit 4.
4 is connected to the connection terminal/terminal C, one is connected to the connection terminal via a resistor R and a noise filter 49, and is branched from between the resistor R and the noise filter 49 to the power supply circuit. 36, and one is connected to the connection terminal E via a noise filter 50. Further, the output side is connected to each knot circuit of the driver circuit 47 connected correspondingly to the light emitting diodes a, b, c, d, and i. Regarding the light emitting diode a, since the detection magnet 12 is not operating, the comparison circuit 44
When the limit switch 11 opens the circuit and the signal from the power supply circuit 36 is input through the resistor R, and the pressure switch 13 is not activated, the voltage signal from the battery 6 is input. The circuit is configured to output to the NOT circuit of the driver circuit 47 corresponding to the light emitting diode a only when the three conditions that are not met are satisfied. Regarding the light emitting diode b, the magneto 12 is activated and the signal from the comparator circuit 44 is input, and the operation of the limit switch 17 and the pressure switch 13 is such that the light emitting diode b The circuit is configured to output the signal to the NOT circuit of the driver circuit 47 corresponding to the signal. Furthermore, regarding the light emitting diode C, among the three lighting conditions for the light emitting diode b, when the limit switch 17 closes the circuit, the signal from the power supply circuit 36 is short-circuited and is not input. The circuit is configured to output to the NOT circuit of the driver circuit 47 corresponding to the light emitting diode C when the same condition as ('t) occurs.

Furthermore, regarding the light emitting diode d, the magneto 12
is activated and the signal from the comparison circuit 44 is input, and the pressure switch 13 is activated and the voltage signal from the battery 6 is input. The circuit is configured to output. Here, the light emitting diode i is used to display the presence or absence of cooling water when the engine 3 is a water-cooled engine that uses water from the water pump 4 as cooling water, and is unnecessary when the engine 3 is an air-cooled engine. be. Regarding this light emitting diode 1, the pressure switch 13
The driver circuit 41 corresponds to the light emitting diode i only under the condition that the voltage signal of the battery 6 is not panned without operating.
The circuit is configured so that the output is sent to the knot circuit of and,
FIG. 6 shows the lighting pattern of each of the above-mentioned light emitting diodes.

Next, the voltage detection circuit 45 has its input side connected to the battery sensor 21 via the noise filter 51, and its output side connected to the NOT circuit of the driver circuit 41 corresponding to the light emitting diode e. When the input voltage from the battery sensor 21 decreases due to a drop in the electrolyte level, the voltage is output to the NOT circuit to light the light emitting diode e.

In the above configuration, when the main switch 10 is first set to the on position, the switch contact 10c is closed and the magnet 1
1 is released and the spark plug 35 becomes magneto 1.
1, the engine pump 1 becomes ready to generate one spark. At this time, the battery 6 and the monitor circuit M
The monitor circuit M is connected to the monitor circuit M through the connection terminals Δ and B, and upon receiving this power, the monitor circuit M becomes operable. In this state, the detection magnet 12 is not activated yet.
Since the limit switch 17 and the pressure switch 13 also remain in their circuits, the signal pattern input to the decoder circuit 46 becomes 0-1-0 as shown in FIG. Only "a" lights up, and this lights up on the display board 28 of the display boards 28 to 31 arranged in a circle on the monitor panel 22 to indicate that the engine pump 1 is ready for operation.

Next, when the main switch 10 is set to the start position, the starter motor 7 is driven by closing the switch contact 10b, and the rotation of the engine 3 accompanying this drives the magnet 1.
1 operates to spark the ignition plug 35, and the engine 3 is started. When the main switch 10 is at the start position, the switch contact 10a remains closed, and the magneto 12 also starts operating when the engine 3 starts, so the electromotive force is brought to the monitor circuit M and the decoder circuit 46. The input signal pattern becomes 1-1-0, and only one of the light-emitting diodes a to d is turned on, and the light-emitting diode a, which has been turned on so far, is turned off. The light emitting diode b is the monitor panel 2.
2, the operating state of the engine pump 1 is displayed. In this engine starting state, the magneto 12 is used as a power source to turn on the lamp L to illuminate the operation panel (not shown), so that it can be operated reliably even at night. If the structure of the main switch 10 is such that the switch contact 10a at the on position opens when the main switch 10 is set to the start position, the light emitting diode lights up, so you can reliably confirm activation in this case as well. Further, even when starting the engine 3 by a recoil starter (not shown) with the main switch 10 in the ON position without using the starting motor 1, the light emitting diode b lights up at the same time as starting, so that the starting can be confirmed.

After confirming that engine 3 has started, switch main switch 1
0 manually or automatically to the on position (. Then, after the engine 3 has been warmed up as specified, the control lever 16 is rotated to connect the tension clutch 15. Along with this, the vacuum pump 5 is activated. The engine pump 1 starts sucking water while removing air from the water pump 4. In other words, the engine pump 1 enters a water suction state, and in this state, the rotation operation of the operating lever 16 becomes cloudy and the limit switch 1γ is turned off. operates and closes the circuit, so the signal pattern input to the decoder circuit 46 becomes 1-0-0, and the light emitting diode a
Of the lights d to d, only light emitting diode C lights up, and light emitting diode b, which has been lit up to now, is turned off.

By disposing the light emitting diode C on the display board 30 on the monitor panel 22, the water absorption state of the engine pump 1 is displayed. If this state continues for a while, the water pump 4 will be filled with pumped water and water can be discharged by the water pump 4 directly driven by the engine 3. At this time, the pressure switch 13 will operate and close the circuit. In the state where water can be sprayed, the signal pattern input to the decoder circuit 46 is 1-0-i.Here, the signal between the activation signal of the magneto 12 and the pressure switch 13 is sufficient for lighting the light emitting diode d, so the limit Even if the switch 11 is opened and the input signal pattern becomes 1-1-1, or even in the 1-0-1 pattern described above, only the back d of the light emitting diodes a to d lights up, which was previously lit. The light emitting diode C is turned off, and this indicates on the display board 31 that the engine pump 1 is in a water discharging enabled state.When this water discharging enabled state is confirmed, the operating lever 16 is returned to cut off the power transmission to the vacuum pump 4. Water discharge work is started by the operation of the water pump 4.As the water discharge work progresses, when the water source dries up and water discharge becomes impossible, the pressure switch 13 opens the circuit, and at this time the limit switch 11 also closes the operation lever 16. Since the circuit is opened by the return operation and only the magneto 12 is operating, the signal pattern input to the decoder circuit 46 is 1-1-0.
Then, the light emitting diode d, which had been lit up until now, goes out and the light emitting diode b lights up instead, and the starting state of the engine pump 1 is now displayed. Also, at this time, the abnormality warning display board 2 placed in the center of the monitor panel 22
1, the pressure switch 13 opens the circuit and no longer outputs the battery voltage signal to the decoder circuit 46, so the light emitting diode i lights up to warn that there is no engine cooling water.

Here, lighting of the light emitting diodes e to 1) arranged on the other abnormality warning display boards 24 to 26 will be explained. If the main switch 10 is in the ON position, these lights can be lit regardless of the operating step of the engine pump 1. For example, when the level of electrolyte in the battery 6 is low and needs to be replenished, the patch relay can be turned on. 21
The light emitting diode e is activated on the display board 24 by the signal from
lights up to warn you. Similarly, when the battery 6 is in an over-discharged state, a light emitting diode f lights up on the display board 24 based on a signal from the comparator circuit 43 to warn of this. Further, when the fuel in the fuel tank 8 decreases and needs to be replenished, the light emitting diode 9 lights up on the display board 25 based on the opening of the fuel float switch 20 to notify this. Furthermore, lack of oil in the oil tank 9 is detected by opening the oil float switch 19, and based on this signal, a light emitting diode h lights up on the display panel 2G to warn of this.

In this embodiment, the battery 6 necessary for operating the engine pump is displayed on the monitor panel 22.
abnormality, fuel in the fuel tank 8 decreases.

When the oil in the oil tank 9 decreases and the pumped water is used as cooling water for the engine, a warning is given that the cooling water is running out. It is possible to prevent accidents such as damage to the engine 3 causing water absorption to become inefficient, or overheating of the engine 3 due to lack of engine cooling water. Also, prepare engine pump 1, start it up, and suck water.

Each operating step of the water discharge is displayed by lighting up the light emitting diodes a to d on the monitor panel 22, and the lighting is performed chronologically and selectively in one light display based on each operating step of the engine pump 1. There is no misreading of the display. In addition, since the display boards 28 to 31 that display each operation step are arranged in a circle on the monitor panel 22 in the order of the operation steps, the mutual positional relationship of the light emitting diodes a to e that display these can be clearly seen. This allows you to properly recognize the meaning of the display just by glancing at the lighting of the light emitting diodes a to e, and prevents erroneous operation of the engine pump 1, even if you are inexperienced in handling it. Can be operated quickly and reliably.

In this embodiment, an electromagnetic clutch mechanism may be used instead of the tension clutch 15, and in this case, the actuation signal of the electromagnetic clutch may be used as the actuation detection signal of the vacuum pump 5 instead of the limit switch 17. I can do it.

Further, the vacuum pump 5 may be driven by a motor that uses the battery 6 as a power source, and in this case, the on/off switch is used as an operation detection sensor for the vacuum pump 5 instead of the limit switch 17. be able to.

As explained above, according to the present invention, each operation step from the engine pump's operation preparation state to the water discharge ready state is displayed by lighting, so that the engine pump can be operated even in a noisy usage environment such as a firefighting site. can be carried out quickly and reliably at each operation step, eliminating the inconvenience of not being able to perform water spraying work due to unfamiliar handling.

[Brief explanation of the drawing]

Fig. m1 shows an embodiment of the engine pump to which the present invention is applied; Fig. 2 is a schematic side view of its operation display device; Fig. 3 is a front view of the monitor panel; Fig. 4 is an operation display. FIG. 5 is a block diagram of the circuit configuration of the device, FIG. 5 is a logic sequence diagram of the decoder circuit in the monitor circuit, and FIG. 6 is an input signal pattern diagram for the decoder circuit. 1...engine pump, 3...engine, 4...
Lifting pump, 5... Vacuum pump, 6... Battery,
8...Fuel tank, 9...Oil tank, 10...
・Main switch, 12...Detection magneto, 13...
・Pressure switch, 17...Limit switch, 19・
...Oil float switch, 20...Fuel float [''-
Toggle switch, 21... Battery sensor, 22... Monitor panel, 36... Power supply circuit, 41... Voltage conversion circuit, 42... Reference voltage generation circuit, 43.44...
- Comparison circuit, 45... Voltage detection circuit, 46... Decoder circuit, 47... Driver circuit, a to i...
light emitting diode. Patent applicant: Tomi± [Bin Co., Ltd. Agent: Patent attorney: Makoto Kobashi, Ukiyo Patent attorney: Susumu Murai

Claims (1)

[Scope of Claims] (1) An engine pump that includes an engine, a water pump driven by the engine, and a vacuum pump that sucks water into the water pump, and that discharges water with the water pump after the vacuum pump completes water suction. It is equipped with a detection means consisting of the main switch of the engine pump, a sensor for detecting engine rotation, a sensor for detecting operation of the vacuum pump, and a sensor for detecting the completion of water suction, and a signal from this detection means is sent to a monitor circuit to detect the engine pump. An operation display device for an engine pump, characterized in that each operation step from an operation preparation state to a water discharging state is indicated by lighting of the monitor circuit. C) The monitor circuit processes the signal from the detection means to prepare at least the engine pump. An operation display device for an engine pump as claimed in claim 1, characterized in that it has a decoder circuit that selectively displays each operation step of starting, water suction, and water discharge in chronological order by lighting. (3) The operation of the engine pump according to claim 1 or 2, wherein the lighting indicating each operation step of the engine pump is arranged in a leak-like manner in the display section. Display device.