JP2500647Y2 - Watering car - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler for sprinkling a liquid on a road surface or the like.

[0002]

2. Description of the Related Art Conventionally, a tank having a plurality of storage chambers is mounted on a vehicle body, and a pump is provided so that liquid can be supplied to each storage chamber and the liquid stored in each storage chamber can be sprinkled and circulated. A sprinkler is provided.

[0003]

However, in the above-mentioned conventional one, since only the manual bottom valve is provided at the bottom of each storage chamber, these bottom valves are opened to store two or more chambers. When water is sprayed from the storage chambers at the same time, there is a difference in the water level between the storage chambers due to differences in piping resistance or differences in the capacity of the storage chambers. As a result, air is sucked from the pump, resulting in poor suction of the pump, resulting in a problem that water cannot be sprayed even though sufficient liquid remains in the other storage chambers.

[0004]

In the water sprinkler of the present invention, a tank having a plurality of storage chambers is mounted on a vehicle body, and a liquid can be supplied to each storage chamber by a pump and stored in each storage chamber. In a water sprinkler pipe capable of sprinkling a liquid, each of the storage chambers is provided with a water level detector that detects that the liquid stored in the storage chamber has reached a minimum water level that is almost empty, and A sub-bottom valve, which can be opened and closed by an actuator that can be driven by a solenoid valve, is interposed between the bottom valve disposed at the bottom of the storage chamber and the pump, and based on the detection signal of the water level detector. , The sub-bottom valves are sequentially closed in the order in which the liquid in each storage chamber reaches the minimum water level, and the sub-bottom valves that were closed earlier when the liquid in the last storage chamber where the sub-bottom valve is not closed reach the minimum water level are totally closed. The control circuit is configured to open

[0005]

When the liquids of two or more storage chambers are used at the same time for watering, a difference in water level occurs between the storage chambers due to a difference in piping resistance or a difference in capacity between the storage chambers, and the water level drops quickly. When the storage chamber becomes almost empty, the water level detector detects this state and closes the sub bottom valve of this storage chamber. In this way, the sub-bottom valve is closed sequentially from the storage chamber where the water level drops quickly and becomes almost empty, and when the liquid in the last storage chamber where the sub-bottom valve is not closed is almost empty, Open all sub-bottom valves closed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall construction of a watering truck according to the present invention.

A plurality of sprinklers 1 (four in this example) are mounted on the vehicle body 2.
The tank 3 having the storage chambers 5a to 5d is mounted. Each of the storage chambers 5a to 5d includes the storage chambers 5a to 5d.
Water level detectors 6a to 6d are provided to detect that the liquid stored in 5d has reached a state of the lowest water level close to the sky.

Further, water sprinkling nozzles 7 arranged in the tank 3 are arranged in front of and behind the vehicle body 2. Watering nozzle 7
May be provided only at the rear or only at the front, or may be provided at the side. Further, the number of watering nozzles 7 may be set to an optimum number suitable for the application.

Reference numeral 4 in FIG. 1 indicates each storage chamber 5a.
It is a vent provided in the upper part of ~ 5d.

FIG. 2 is a piping diagram of a watering truck according to the present invention.

In FIG. 2, 10 is each of the storage chambers 5a-5d.
It is a manual bottom valve provided at the bottom of each. The bottom valve 10 is linked to a handle 11 provided on the upper part of the storage chambers 5a to 5d, and the bottom valve 10 is configured to be openable and closable by rotating the handle 11.

Each bottom valve 10 is connected to the suction side of the pump P by each pipe 12a-12d, and each pipe 12a-1 is connected.
Sub-bottom valves 13a to 13d are respectively provided in 2d. In addition, a three-way switching cock 14 is provided at the confluence of these pipes 12a to 12d. The three-way switching cock 14 has a position where the suction side of the pump P communicates with each bottom valve 10 and the storage chambers 5a to 5d. When the liquid is supplied, it can be switched to a position communicating with the water supply port 15 to which a liquid supply source (not shown) is connected.

The discharge side of the pump P is connected by a sprinkling pipe 16 to the front and rear sprinkling nozzles 7 via a sprinkling valve 17, and a circulation pipe 18 branched from the sprinkling pipe 16 respectively.
Is communicated with each of the storage chambers 5a to 5d via the circulation valve 20. Each end of the circulation pipe 18 on the side of the storage chambers 5a to 5d is arranged at the bottom of the storage chambers 5a to 5d, and a plurality of injection ports for injecting to the bottom are formed at this end. .

Reference numeral 21 in FIG. 2 is a manual on-off valve provided in the circulation pipe 18 together with the circulation valve 20. Reference numeral 22 is a discharge port that communicates with a discharge pipe 23 branched from the sprinkler pipe 16 via a discharge valve 24.

FIG. 3 shows a drive system for opening and closing the sub bottom valves 13a to 13d.

In FIG. 3, reference numeral 30 denotes a brake air tank mounted on the water sprinkler 1. Compressed air from the brake air tank 30 passes through a protection valve 31 and electromagnetic valves 32a to 32d, and air cylinders (actuators). 33a-33d. The air cylinders 33a to 33d are expanded and contracted by switching the solenoid valves 32a to 32d, whereby the sub bottom valves 13a to 13d are expanded.
Open and close. Reference numeral 35 is a silencer arranged on the low-pressure side of the solenoid valves 32a to 32d, which opens to the atmosphere via this silencer.

Further, the sprinkling valve 17, the circulation valve 20,
The discharge valve 24 is also configured to be opened and closed by an air cylinder that expands and contracts by switching electromagnetic valves.

FIG. 4 shows an example of a relay sequence circuit for controlling the solenoid valves 32a to 32d.

In FIG. 4, R1 to R4 are relays, r1
a to r4a are normally open relay contacts, and r1b to r4b are normally closed relay contacts. Reference numerals 40a to 40b are contact points of the water level detectors 6a to 6d, which are closed when the liquid is fully stored in the storage chambers 5a to 5d, and are opened when the liquid reaches the lowest water level which is almost empty. SOL1 to SOL4 are solenoids of the solenoid valves 32a to 32d.

Next, the case where water is sprinkled by the water sprinkler 1 thus constructed will be described.

When the liquids stored in the storage chambers 5a to 5d are simultaneously sprayed, the bottom valves 10 of the storage chambers 5a to 5d are opened and the three-way switching cock 14 is connected to the bottom valves 10 and the suction side of the pump P. And the water spray valve 17
Open the circulation valve 20 (or open / close valve 21), discharge valve 2
Close 4 respectively. At this time, the contacts 40a to 40d of the water level detectors 6a to 6d are closed because the liquid is fully stored in the storage chambers 5a to 5d. As a result, the solenoids SOL1 to SOL4 are demagnetized as shown in FIG.
All of a to 13d are opened.

By operating the pump P in this state,
The liquid in each of the storage chambers 5a to 5d is sprayed from the water spray nozzle 7 through the pump P and each water spray pipe 16.

In this sprinkling, when a difference in water level occurs between the storage chambers 5a to 5d due to a difference in pipe resistance or a difference in capacity between the storage chambers, here, the storage chambers 5a to 5d are sequentially ordered. It is assumed that the water level of the liquid drops quickly at.

In this case, first, when the water level in the storage chamber 5a drops and reaches a minimum water level near the sky, the water level detector 6a detects this and the contact 40a of the water level detector 6a.
Opens and degausses relay R1. When the relay R1 is demagnetized, the relay contact r1a is opened and the relay contact r1 is opened.
1b is closed and the solenoid SOL1 is excited to switch the solenoid valve 32a, whereby the air cylinder 33a is extended and the sub bottom valve 13a is closed. Therefore, the storage chamber 5a
The supply of liquid from the pump to the pump P is stopped.

Next, when the water level in the storage chamber 5b drops and reaches the minimum water level in the storage chamber 5b, the water level detector 6b detects this, and the contact 40b of the water level detector 6b opens and the relay R
Degauss 2. Demagnetization of relay R2 causes relay contact r2
When a is opened, the relay contact r2b is closed, the solenoid SOL2 is excited, and the solenoid valve 32b is switched,
As a result, the air cylinder 33b extends and the sub-bottom valve 13
Close b. Therefore, the supply of the liquid from the storage chamber 5b to the pump P is stopped.

Further, when the water level in the storage chamber 5c drops and reaches the minimum water level in the storage chamber 5c, the water level detector 6c detects this and closes the sub bottom valve 13c as described above.

In this manner, the sub-bottom valves 13a-1 of the storage chambers 5a-5c are arranged in the order in which the water level drops quickly and becomes almost empty.
3c is closed, and when the liquid in the last storage chamber 5d where the sub bottom valve 13d is not closed becomes almost empty, the contact 40d of the water level detector 6d is opened and all the relays R1 to R4 are demagnetized. The relay contacts r1a to r4a are all opened, and the relay contacts r1b to r4b are all closed. As a result, all the energized solenoids SOL1 to S
The OL4 is demagnetized and the sub bottom valves 13a to 13c are opened.

As a result, all the sub-bottom valves 13a-13
The d is opened, and the liquid remaining in the storage chambers 5a to 5d is sprayed.

In this way, the sub bottom valves 13a to 13c are sequentially closed in the order in which the liquid in each of the storage chambers 5a to 5d reaches the lowest water level, and the last storage chamber 5 in which the sub bottom valve 13d is not closed is closed.
By opening all the sub-bottom valves 13a to 13c that were closed earlier when the liquid of d reached the minimum water level, the respective storage chambers 5a to 5d were opened.
The liquid can be sprayed smoothly and efficiently to the end.

The liquids in the storage chambers 5a to 5d may be lowered in any order.

Also, when the liquid in each of the storage chambers 5a to 5d is discharged, the sub bottom valves 13a to 13d operate in the same manner as described above.

Further, by operating the opening / closing of each of the valves, liquid can be supplied from the water supply port 15 to each of the storage chambers 5a to 5d, and the sediment deposited on the bottom of each of the storage chambers 5a to 5d can be removed. The liquid in each of the storage chambers 5a to 5d can be circulated for stirring.

[0034]

As described above, according to the water sprinkler of the present invention, the sub bottom valves are sequentially closed in the order in which the liquid in each storage chamber reaches the minimum water level, and the sub bottom valves are not closed. By opening all the sub-bottom valves that were closed earlier when the liquid in the storage chamber reached the minimum water level, it was possible to prevent poor suction of the pump due to air suction from the storage chamber where the water level dropped quickly, as in the past. The liquid in each storage chamber can be sprayed smoothly and efficiently to the end.

[Brief description of drawings]

FIG. 1 is a side view showing an overall structure of a watering truck according to the present invention.

FIG. 2 is a piping diagram of a watering truck.

FIG. 3 is an air piping diagram showing a drive system that opens and closes a sub bottom valve.

FIG. 4 is a relay sequence circuit that controls a solenoid valve.

FIG. 5 is a relay sequence circuit showing a contact switching state when liquid is stored in each storage chamber.

[Explanation of symbols]

 1 Sprinkler 2 Body 3 Tank 5a-5d Storage chamber 6a-6d Water level detector 13a-13d Sub bottom valve 32a-32d Electromagnetic valve 33a-33d Air cylinder (actuator) 40a-40d Contact of water level detector

Claims (1)

(57) [Scope of utility model registration request] 1. A tank having a plurality of storage chambers is mounted on a vehicle body, and liquid can be supplied to each storage chamber by a pump.
And in a water sprinkler piped so that the liquid stored in each storage chamber can be sprayed, in each of the storage chambers, a water level for detecting that the liquid stored in the storage chamber has reached a minimum water level that is almost empty. A detector is provided, and a sub-bottom valve that can be opened and closed by an actuator that can be driven by an electromagnetic valve is interposed between the bottom valve provided at the bottom of each storage chamber and the pump. Based on the detection signal of the detector, the sub-bottom valves are sequentially closed in the order in which the liquid in each storage chamber reaches the minimum water level, and when the liquid in the last storage chamber where the sub-bottom valve is not closed reaches the minimum water level, A water sprinkler having a control circuit configured to open all the sub-bottom valves closed.