JP3970575B2 - Dispersion control device for liquid sprayer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spray control device for a liquid spray vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a liquid storage tank is provided on a vehicle body, and a liquid spray vehicle is provided that supplies liquid from the liquid storage tank to a spray nozzle through a control valve by operating a spray pump and sprays the liquid from the spray nozzle. Yes.
[0003]
In this liquid spraying vehicle, vehicle speed synchronization control is performed to control the amount of liquid supplied from the spraying pump to the spraying nozzle by adjusting the opening of the control valve according to the vehicle speed. The amount of liquid sprayed is made constant per unit area.
[0004]
[Problems to be solved by the invention]
However, the conventional control of the spray amount by adjusting the opening of the control valve according to the vehicle speed has the following problems.
[0005]
When the engine speed fluctuates due to a gear change or the like while the vehicle is running, the rotation speed of the spray pump operated by the engine also fluctuates in conjunction. As a result, the supply amount of the liquid supplied from the spray pump to the spray nozzle through the control valve also varies. For this reason, even if the opening degree of the control valve is the same, the spray amount for spraying the liquid from the spray nozzle varies. Therefore, even if the opening degree of the control valve is adjusted according to the vehicle speed, if the engine speed fluctuates, the amount of liquid sprayed will vary according to this fluctuation, and stable vehicle speed tuning control is performed. There was no problem.
[0006]
The present invention has been made in view of the above problems, and its object is to provide stable vehicle speed tuning control by correcting the opening of the control valve in accordance with fluctuations in the number of revolutions of the spray pump. An object of the present invention is to provide a spray control device for a liquid spray vehicle capable of performing the above.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, a liquid storage tank is mounted on a vehicle body, and the liquid storage tank is connected to a spray nozzle through a spray pump and a control valve, and is controlled according to the vehicle speed. In the spray control device of the liquid spray vehicle configured to control the spray amount of the liquid from the spray nozzle by adjusting the opening of the valve, the rotational speed of the spray pump or the engine that drives the spray pump is set. A rotation speed detector for detection is provided, and the opening degree of the control valve is corrected based on a detection value of the rotation speed detector.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0009]
FIG. 1 shows a schematic overall configuration of the liquid sprayer.
[0010]
In FIG. 1, reference numeral 1 denotes a liquid spraying vehicle. A liquid storage tank 2 is mounted on the vehicle body of the liquid spraying vehicle 1, and spray nozzles 3 are arranged at the front and rear portions of the vehicle body.
[0011]
These spray nozzles 3 are arranged, for example, at the front part or the rear part of the vehicle body, and as shown in FIG. 2, the liquid storage tanks 2 are respectively connected to the liquid storage tanks 2 by water pipes 4 in which spray pumps 5 and control valves 6 are interposed. It is communicated.
[0012]
FIG. 2 shows a configuration for spraying the liquid in the liquid storage tank from the spray nozzle.
[0013]
The liquid storage tank 2 is connected to the base end of a water supply pipe 4, and the water supply pipe 4 is provided with a spray pump 5 and a control valve 6 sequentially from the liquid storage tank 2 side. The spray nozzle 3 is connected to the part.
[0014]
The spray pump 5 is connected to a traveling engine 7 mounted on the vehicle via a PTO 8 that is a power take-out device. Accordingly, when the spray pump 5 is rotated through the PTO 8 by driving the engine 7, the liquid in the liquid storage tank 2 is supplied from the spray pump 5 to the spray nozzle 3 through the control valve 6.
[0015]
The control valve 6 is configured such that its opening degree is controlled by a spray control device 10 mounted on the liquid spray vehicle 1.
[0016]
The spray control device 10 receives a vehicle speed signal from a vehicle speed sensor 11 that detects the vehicle speed of the liquid spray vehicle 1, and performs vehicle speed synchronization control for controlling the spray amount of the liquid according to the vehicle speed based on the vehicle speed signal. .
[0017]
Specifically, the vehicle speed tuning control is performed by controlling the opening degree of the control valve 6 so that the amount of liquid sprayed per unit area on the road becomes constant according to the change in the vehicle speed detected by the vehicle speed sensor 11. Thus, the liquid corresponding to the opening degree of the control valve 6 is sprayed from the spray nozzle 3. In other words, the opening degree of the control valve 6 is controlled so that the spray amount is increased when the vehicle speed becomes faster and the spray amount is reduced when the vehicle speed becomes slower, so that the set spray amount can be obtained at a preset set speed. I have to.
[0018]
On the other hand, the spray pump 5 is provided with a rotational speed detector 12 for detecting the rotational speed of the spray pump 5, and the rotational speed signal detected by the rotational speed detector 12 is input to the spray control device 10. Is done.
[0019]
In the spraying control device 10, when performing the vehicle speed tuning control by the control valve 6 described above, the opening degree of the control valve 6 is further corrected based on the rotational speed signal from the rotational speed detector 12.
[0020]
This is because if the rotational speed of the spray pump 5 detected by the rotational speed detector 12 fluctuates, the discharge amount discharged from the spray pump 5 changes. This is because even if the operation is performed, the amount of spraying varies according to the vehicle speed. That is, according to the fluctuation | variation of the rotation speed of the spraying pump 5, the correction amount is further added to the opening degree of the control valve 6 so that the spraying amount sprayed according to the vehicle speed becomes constant.
[0021]
Specifically, for example, if the rotation speed of the spray pump 5 detected by the rotation speed detector 12 is higher than a predetermined range, a correction for reducing the opening of the control valve 6 by a predetermined amount is performed to rotate the spray pump 5. If the number is lower than the predetermined range, correction is performed to increase the opening of the control valve 6 by a predetermined amount. The correction of the opening degree of the control valve 6 is performed within a range that does not destroy the vehicle speed synchronization control that is originally performed by the control valve 6.
[0022]
When liquid such as water or an antifreezing agent (medicine) is sprayed on the road by the spray control device of the liquid spray vehicle 1 configured as described above, the liquid is stored in the liquid storage tank 2, and the liquid spray vehicle 1. By operating the spray pump 5 while running, the liquid is supplied from the liquid storage tank 2 to the spray nozzle 3 through the control valve 6, and sprayed from the spray nozzle 3 onto the road.
[0023]
At this time, the spray control device 10 determines the opening degree of the control valve 6 in accordance with the vehicle speed so as to perform vehicle speed tuning control based on the vehicle speed signal from the vehicle speed sensor 11, and the rotation speed signal from the rotation speed detector 12. Based on the above, the determined opening degree of the control valve 6 is corrected according to the rotational speed of the spray pump 5, and an operation signal is output to the control valve 6 so as to obtain the corrected opening degree.
[0024]
In this way, by performing vehicle speed synchronization control while correcting the opening of the control valve 6 according to the rotation speed of the spray pump 5, it is assumed that the rotation speed of the spray pump 5 fluctuates due to gear changes or the like during liquid spraying. In addition, a predetermined amount of liquid corresponding to the vehicle speed can be stably dispersed without variation by the vehicle speed synchronization control.
[0025]
In the present embodiment, the rotation speed of the spray pump 5 is detected by the rotation speed detector 12, and the opening degree of the control valve 6 is corrected based on the detection result. If the rotational speed of the engine 7 that operates the pump 5 changes, the rotational speed of the spray pump 5 also changes accordingly. Therefore, the rotational speed of the engine 7 is detected by the rotational speed detector 12, and based on this detection result. The opening degree of the control valve 6 may be corrected.
[0026]
【The invention's effect】
As described above, according to the spray control device for a liquid spray vehicle according to the present invention, the rotation speed detector for detecting the rotation speed of the spray pump or the engine that drives the spray pump is provided. Since the opening of the control valve is corrected based on the detected value, even when the number of rotations of the spray pump fluctuates during liquid spraying, a predetermined amount of liquid varies depending on the vehicle speed through vehicle speed synchronization control. Can be sprayed stably.
[Brief description of the drawings]
FIG. 1 is a side view showing a schematic overall configuration of a liquid spraying vehicle.
FIG. 2 is a schematic diagram showing a configuration for spraying liquid in a liquid storage tank from a spray nozzle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Liquid dispersion wheel 2 Liquid storage tank 3 Spray nozzle 5 Spray pump 6 Control valve 7 Engine 12 Speed detector

Claims (1)

A liquid storage tank is mounted on the vehicle body, and this liquid storage tank is communicated with the spray nozzle through a spray pump and a control valve, and the liquid is sprayed from the spray nozzle by adjusting the opening of the control valve according to the vehicle speed. In the spray control device of the liquid spray vehicle configured to control the amount, a rotation speed detector that detects the rotation speed of the spray pump or the engine that drives the spray pump is provided. A spray control device for a liquid spray vehicle configured to correct the opening of the control valve based on a detection value.

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