JPS5837482Y2 - Sprayer water supply system - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a water supply device for a sprayer having a chemical tank.

Conventionally, jet pumps have been widely used as water supply devices to chemical tanks of sprayers because they are relatively inexpensive and easy to use.

However, in the general method of creating the fountain that activates the jet pump with a spray pump using water in a chemical solution tank, by some means, enough water to operate the jet pump properly is added to the chemical solution in advance. It needs to be kept in the tank.

This work is quite troublesome to do manually, especially in the case of a traveling sprayer, as the top of the chemical tank is located quite above the ground. Although it is somewhat inefficient, its water supply capacity is never utilized.

This invention connects the intake pipe for water supply to both the spray pump and the jet pump for water supply through a three-way cock, and first, until the jet pump for water supply can be operated normally. Supply water to the chemical tank with a spray pump,
Next, the present invention aims to provide an efficient, fully automatic water supply system that can supply water to a chemical tank using two pumps, a jet pump and a spray pump, by switching the three-way cock.

Next, the present invention will be explained in detail based on the embodiment shown in the figures.

In Figures 1 to 3, a water intake pipe 8 with a three-way cock 3 having a T-shaped flow path and a check valve 15, and a water intake pipe 9 of a high-pressure spray pump HP and a water supply jet pump JP are shown. ，
10 and the discharge pipe 1 of the jet pump JP for water supply.
2 to the bottom of the chemical tank 1.

Next, the spill pipe 14 of the spray pump HP is connected to the chemical tank 1 via the pressure regulating valve 6, and the discharge pipe 11 for high-pressure water for jet pump operation is connected to the water supply jet via the cock 7.
Connect to the nozzle of Pump JP.

Furthermore, another discharge pipe 13 is connected to the spray pump HP and connected to the spray nozzle 5 via the cock 4.

Since the water supply device according to the present invention is constructed as described above, in order to supply water to the chemical liquid tank 1, the water intake pipe 8 is first inserted into the water source 2 as shown in FIG.
Operate it so that it communicates only with the water suction pipe 9 of P, prevent the spray pump HP from sucking air from the chemical tank 1 via the jet pump JP, and connect the discharge pipe 13 to the spray nozzle 5.
The cock 4 of the jet pump JP is kept closed, and the cock 7 of the discharge pipe 11 to the jet pump JP is opened.

If the spray pump HP is driven in such a state, even if the chemical tank 1 is completely empty, the water in the water source 2 will flow from the water intake pipe 8 to the check valve 15 to the three-way pot 3 due to the self-priming action of the spray pump HP.
- Water suction pipe 9 - Spray pump HP - Cock 7 - Discharge pipe 11
The liquid is sent to the chemical tank 1 through the jet pump JP, the path of the discharge pipe 12 and the pressure regulating valve 6, and the spill pipe 14.

At this time, the passage opened to the atmosphere in the chemical tank 1 via the jet pump JP and the discharge pipe 12 is blocked by the three-way cock 3, so the water absorption action by the spray pump HP is not hindered.

When water has been supplied by the spray pump HP until the opening of the discharge pipe 12 of the jet pump JP is submerged in water (preliminary water supply completed), operate the three-way cock 3 to remove the water as shown in Figure 2. If the water from the water pipe 8 is made to flow not only to the water suction pipe 9 side of the spray pump HP but also to the water suction pipe 10 side of the jet pump JP at the same time, the jet pump JP is a spray pump that sprays water from the nozzle. The water from the water source 2 is sucked up by the suction generated by the high-pressure water generated by the HP, and the water is efficiently transferred to the chemical tank 1 along with the spray pump HP.
send to.

(Main water supply) When a predetermined amount of water has been supplied to the chemical tank 1 by mixing the medicine into the water supply, the cock 7 is closed, and the water supply by the jet pump JP is stopped.

At this time, the water supply action of the spray pump HP continues through the spill pipe 14, and since the jet pump JP does not have a backflow prevention mechanism, the water in the chemical tank 1 flows into the jet pump J.
Water flows backward through P and competes with water from the intake pipe 8, causing problems. Therefore, as shown in Figure 3, operate the three-way cock 3 to close the intake pipe 8 side, and disconnect the jet pump JP and the spray pump. The HP water suction pipes 10 and 9 are made to communicate with each other.

In this way, the water supply is stopped without putting any strain on the check valve 15 or the piping, and the chemical liquid in the chemical liquid tank 1 is transferred to the discharge pipe 1.
2-Jet pump JP-Suction pipe 10 Three-way cock 3-
It circulates through the water suction pipe 9 - the spray pump HP - the pressure regulating valve 6 - the spill pipe 14 and is sufficiently stirred.

If the cock 4 of the discharge pipe 13 to the spray nozzle 5 is opened in this state, a sufficiently stirred chemical solution will be sprayed from the spray nozzle 5.

On the other hand, in the conventional water supply system shown in FIG. 4, the water suction pipe 9 of the spray pump HP is separately connected to the chemical tank 1, and the preliminary water supply necessary to operate the jet pump JP is carried out in advance. Additional manual effort is required, and if water is left in the chemical tank 1, problems such as rusting and corrosion will occur.

Furthermore, when water is supplied, the spray pump HP only circulates the supplied water in order to operate the jet pump JP, but does not perform any water supply action on its own, so it cannot be said to be an efficient way to use it.

According to this invention, it is possible to completely automatically supply water from an empty chemical tank by simply operating a cock, and in addition to the jet pump's water supply capacity, water is also supplied by a spray pump, so two Efficient water supply work can be performed by adding the water supply capacity of a pump.

Furthermore, since the jet pump and its piping can be used as part of the water suction piping of the spray pump, piping etc. can be simplified.

[Brief explanation of drawings]

Figure 1: An explanatory diagram of the piping according to the embodiment of the present invention (at the time of preliminary water supply), Figure 2: An explanatory diagram of the piping of the embodiment according to the present invention (at the time of main water supply), Figure 3: Explanation of the piping of the embodiment according to the present invention Figure (completed water supply, during spraying), Figure 4: Example of conventional piping. 1... Chemical tank, 3... Three-way cock, 6... Pressure regulating valve, 7... Cock, 8...
... Water intake pipe, 9.10 ... Water intake pipe, 11
...Discharge pipe, 14...Left pipe, HP・
...Spray pump, JP...Jet pump for water supply.

Claims (1)

[Scope of utility model registration request] In the sprayer having the chemical liquid tank 1, the water intake pipe 8 is connected to the water intake pipes 9, 10 of the spray pump HP and the water supply jet pump JP through the three-way cock 3, and the spill water pipe 14 of the spray pump HP is connected to the water intake pipes 9, 10 of the spray pump HP and the water supply jet pump JP. It is connected to the chemical liquid tank 1 through the pressure regulating valve 6, and the discharge pipe 11 is connected to the nozzle of the jet pump JP through the cock 7, and the discharge pipe 12 of the jet pump JP is connected to the lower part of the chemical liquid tank 1. A water supply device for a sprayer, characterized in that the three-way cock 3 is provided with a flow path that allows the water intake pipe 8 to communicate with the two water suction pipes 9 and 10 at the same time.