JPH0335414Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a power sprayer for fixed piping, which is used as a pump source for fixed piping as pest control equipment in orchards and the like.

[Conventional technology]

A power sprayer for stationary piping is equipped with a pressure vibration damper on the discharge side of the pump to suppress pressure vibrations of the chemical solution sent out from the pump, but an air-filled acumulator using a rubber bag Since it is difficult to use a rubber bag as a pressure vibration damper because the rubber bag is eroded by the drug, a fixed volume air chamber is generally used.

In this case, even if a fairly large air chamber is used, the air in the air chamber will flow out within a few hours while the power sprayer is operating, reducing the buffering function and causing abnormal pressure rise, pulsation, and damage to the aircraft. Vibrations and abnormal noises may occur in the piping, which may damage the pump and peripheral equipment. Therefore, the operator should take out the water strainer from the chemical tank to the atmosphere at appropriate intervals and drain the air through the water absorption strainer. into the air chamber,
It was necessary to replenish the air in the air chamber. This not only takes time and labor to operate, but also causes a reduction in the efficiency of pest control work.

[The problem that the idea aims to solve]

The object of this invention is to provide a power sprayer for stationary piping that can eliminate the need for an operator to replenish air into an air chamber.

[Means to solve the problem]

In order to achieve this purpose, this invention has a pump part that sucks the chemical solution from the chemical tank and sends it to the pest control piping, and an air chamber is provided on the discharge side of this pump part to buffer the pressure vibration of the chemical solution. In the power sprayer for fixed piping, the electric on-off valve controls the connection between the suction passage that guides the chemical solution to the suction side of the pump part and the atmospheric space, and the electric on-off valve controls the electric power supply at a predetermined time during operation of the power sprayer. The present invention proposes a power sprayer for fixed piping, which is characterized by having a controller that opens an on-off valve.

[Effect]

When the electric on-off valve is automatically opened during operation of the power sprayer, air is introduced into the suction passage through the on-off valve, and is replenished into the air chamber through the pump section.

[Effect of idea]

In this way, with this invention, air is automatically replenished into the air chamber while the power sprayer is operating, without the need for the operator to take out the water absorption strainer from the chemical tank into the atmosphere, making it easier to perform operations associated with air replenishment. The above labor is omitted, the number of workers can be reduced, and the efficiency of pest control work can be improved.

In addition, automatic air supply to the air chamber reliably prevents the buffering function from being weakened due to air outflow from the air chamber, and prevents abnormal pressure rises and pulsations on the discharge side of the pump, as well as vibrations and abnormal noises in the aircraft and piping. Damage and failure of the pump unit and peripheral equipment caused by this can be avoided.

〔Example〕

This invention will be explained below with reference to the illustrated embodiment.

In the figure, a chemical solution tank 10 contains a chemical solution 1 as an agricultural chemical.
2 is accommodated up to a predetermined level, and a pump section 16 as a main element of the power sprayer 14 is arranged near the chemical solution tank 10. The pump section 16 is driven by an electric motor 20 via a belt 18.
The suction side of the pump section 16 is connected to a strainer 26 in the chemical solution 12 through a cheese 22 and a water suction pipe 24 as a pipe joint, and the discharge side of the pump section 16 is connected to a stationary pest control piping (not shown) through a spray hose 28. connected to. A check valve 30 is provided in the middle of the spray hose 28 to prevent backflow of the chemical solution, and an air chamber 32 with a fixed volume as a buffer chamber is provided in the pipeline from the discharge side of the pump section 16 to the spray hose 28. A pressure regulator 34 is connected. The pressure regulator 34 includes a relief valve that opens when the pressure exceeds a predetermined pressure, and a chemical solution in an amount corresponding to the difference between the water absorption amount and the spray amount is returned from the relief valve to the chemical solution tank 10 via the spill water hose 36.
The pressure gauge 38 is provided at a branch point of the pressure regulator 34 from the pipe line, and displays the pressure of the chemical solution.

In this embodiment, an electromagnetic on-off valve is used as the electric on-off valve 40, and this electromagnetic on-off valve is provided at a branching part of the cheese 22, and is used to open and close this branching part, and therefore to connect the atmospheric port 42 at the lower end of the branching part to the chemical tank 10. The connection with the suction passage that guides the medicinal liquid 12 from the pump section 16 to the suction side of the pump section 16 is controlled. The controller 44 has a timer 46 which is manually set for a certain period of time during which the power sprayer 14 operates, and which measures this certain period of time and generates a predetermined output every certain period of time.
Each time a predetermined output is input from 6, the electromagnetic on-off valve 40 is turned on for another fixed period of time (about several seconds).
It includes a relay 48 that energizes.

Next, the operation of the electromagnetic on-off valve 40 will be explained.

The electromagnetic on-off valve 40 is normally in a non-energized state, and the branch portion of the cheese 22 is closed. Therefore, the chemical liquid 12 sucked from the strainer 26 is guided to the suction side of the pump section 16 through the suction passage,
It is sent out from the discharge side of the pump section 16 toward the spray hose 28 . Before the power sprayer 14 operates, there is air in the air chamber 32 corresponding to its internal volume, and as the power sprayer 14 operates, the air in the air chamber 32 increases depending on the pressure of the chemical solution on the discharge side. It is compressed and the pulsation of the chemical solution is buffered. During operation of the power sprayer 14, the air in the air chamber 32 is mixed with the chemical solution and gradually flows out.

During operation of the power sprayer 14, the timer 46 generates a predetermined output and the relay 48 is turned on every time a certain period of time elapses. As a result, the electromagnetic on-off valve 40
is energized for another fixed period of time (approximately several seconds) to open the branch part of the cheese 22 and open the atmospheric port 42.
Air is guided from there to the suction side of the pump section 16 via the suction passage. As a result, air is sent out from the discharge side of the pump section 16, and the amount of air in the air chamber 32 is restored. In this way, the damping function in the air chamber 32 is well maintained during operation of the power sprayer 14.

In the above embodiment, an example in which an electromagnetic on-off valve is used as the electric on-off valve 40 has been described.
It is possible to replace this with an electric valve. Motorized valves include sluice valves, butterfly valves, ball valves, etc., and open and close the valve body using an electric motor as a driving source. Generally, a transmission mechanism such as a gear is interposed between the two.

[Brief explanation of the drawing]

The drawing is a configuration diagram of a power sprayer according to this invention. In the figure, 10...chemical liquid tank, 12... chemical liquid, 14
...Power sprayer, 16...Pump part, 22...Cheese,
28...Spray hose, 32...Air chamber, 40...Electric on-off valve (electromagnetic on-off valve, electric valve), 42...Atmospheric port, 44...Controller.

Claims (1)

[Claims for Utility Model Registration] (1) It has a pump section that sucks the chemical solution from the chemical solution tank and sends it out to the pest control piping, and an air chamber is provided on the discharge side of the pump section to buffer pressure vibrations of the chemical solution. In the power sprayer for fixed piping, there is provided an electric on-off valve that controls the connection between the suction passage that guides the chemical solution to the suction side of the pump section and the atmospheric space, and a A power sprayer for stationary piping, characterized by having a controller that opens an electric on-off valve. (2) Registration of a utility model characterized in that the controller includes a timer that measures a certain period of time, and in relation to the output of the timer, the electric on-off valve is an electromagnetic on-off valve, and a relay that controls the energization of the electric on-off valve. A power sprayer for stationary piping according to claim 1. (3) A utility model registration request characterized in that the controller includes a timer that measures a certain period of time, and a relay that controls the energization of the electric on-off valve that is related to the output of the timer and that is an electric valve. A power sprayer for stationary piping according to item 1.