JPH0323062Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) At the end of the seedling box transport device that transports the seedling boxes,
This invention relates to an improvement in the irrigation system of a seeding machine equipped with a sensor for detecting the arrival of a seedling box that stops the seedling transport system and the irrigation system.

(Prior Art) A conduit for supplying water to an irrigation pipe is constructed, and a solenoid valve such as a diaphragm valve that electrically opens and closes the conduit is disposed in the middle of the conduit. Furthermore, a flow meter having a check valve function is disposed between the location of the solenoid valve and the irrigation pipe.

(Problems to be solved by the invention) In the case of the above-mentioned conventional device, the range of use under low water pressure is limited due to the large water pressure throttling loss due to the arrangement of the solenoid valve. The problem was that the water could not drain out after use, and it could freeze and expand in cold temperatures, leading to damage.

(Means for solving the problem) The present invention connects a conduit that forms an outlet to the outside in the middle of the water supply pipe that supplies water to the irrigation pipe, and this communication part has a A directional valve is installed to switch the flow path of the liquid (water) to be supplied.
The directional switching valve is linked to a seedling box arrival detection sensor that stops the seedling box transport device attached to the end of the seedling growing transport device of the seeding machine, and when the sensor detects the arrival of the seedling box, the non-arrival to the conduit side is detected. In the sensing state, the flow paths are switched to the irrigation pipe side, and a bench lily is formed in the conduit.
The bench lily and the water supply pipe from the communication portion to the irrigation pipe side are communicated through a connecting pipe.

(Function) During the seeding operation, the seedling box is transferred from the starting end to the terminal end of the seedling box conveying device without any gaps. At this time, the directional switching valve installed in the water supply pipe closes the flow path to the pipe side and opens the flow path to the irrigation pipe side, so when the seedling box passes below the irrigation pipe, the water is irrigated. be done.

A seedling box arrival detection sensor is attached to the end of the seedling box transport device, so if the seedling box is not taken out and collides with the sensor, the sensor is activated and turns off the transport motor of the seedling box transport device.
That is.

If you turn off the transport motor and stop moving the seedling box, the movement will stop and the box will be covered with water, but in this invention, the directional control valve also operates when the water is turned, and the flow path to the irrigation pipe side is controlled. Since the water is switched to block the flow path and open the flow path to the conduit side, water flows to the conduit side and irrigation is stopped. There is no need for a restrictor associated with a device such as a solenoid valve for switching on and off the irrigation, pressure loss is reduced, and irrigation can be performed satisfactorily even under low water pressure conditions. The liquid flowing through the conduit is then discharged to the outside through the bench lily. When the liquid passes through this bench lily, the liquid remaining between the water supply pipe and the irrigation pipe on the side of the irrigation pipe that has been blocked by the directional control valve is removed via the connecting pipe using the same principle as that of a sprayer. There is no risk of liquid dripping from the irrigation pipe after the seedling box transport device has stopped.
Further, after the seeding work is completed, the water supply to the water supply pipe is stopped, and the water in the pipe is opened to the outside, so it can be easily drained.

(Example) a is the irrigation device of the seeding machine 1 that can implement the present invention,
b is a seedling box transport device. Reference numeral 1 denotes a water supply pipe of the irrigation device a that supplies water from a water source (water supply) to the irrigation pipe 2. The water supply pipe 1 and the irrigation pipe 2 are connected in a U-shape. The irrigation pipe 2 is provided in parallel to the transport direction of the seedling box, and the irrigation pipe 2 is a cylindrical pipe with a large number of injection holes, one end 2a of which is connected to the water supply pipe 1, The other end 2b is closed with a stopper 3.

A wire mesh filter 4 is disposed on the water source side of the water supply pipe 1.

A communication port 1a is opened in the middle of the water supply pipe 1 on the left side from the installation location of the filter 4, and this communication port 1a
A conduit 5 forming a discharge port 5a to the outside is connected in communication. Then, at the communication portion between the conduit 5 and the water supply pipe 1, the communication port 1a is closed and water from the water source is passed through the water supply pipe 1 of the water supply pipe 1 to the irrigation pipe 2.
the communication port 1a is opened, and the communication port 1a is opened.
Block the water supply pipe 1 to the irrigation pipe 2 side,
A directional switching valve 6 is disposed to switch water from the water source to a state where water can flow into the conduit 5 side.

A seedling box arrival detection sensor c is attached to the terminal end of the seedling box transporting device b, which stops the transport motor of the seedling box transporting device b when a seedling box collides with the seedling box transporting device b.

The directional switching valve 6 is configured to operate in conjunction with the sensor c, and when the sensor c detects the arrival of the seedling box, the flow path is switched to the conduit 5 side, and when the non-arrival is detected, the flow path is switched to the irrigation pipe 2 side. to be accomplished.

A bench lily 5b is formed in the middle of the conduit 5 by constricting its cross section, and a connecting pipe 7 is provided between the bench lily 5b and the water supply pipe 1 somewhat to the left of the communication port 1a. Form.

In the embodiment, 9 is a pump injection device for Daconyl disinfectant. The pump injection device 9 puts a disinfectant prepared in advance into a tank 9a, and a suction hose 9c that is continuously connected to the suction port of the pump 9b is put into the tank 9a. On the other hand, an injection hose 9d, which is connected to the discharge port of the pump 9b, is connected to the left side of the point of communication between the water supply pipe 1 and the connection pipe 7. The pump 9b is connected to the directional control valve 6.
The pump 9b operates when the directional switching valve 6 closes the communication port 1a, the pump 9b operates when the other water supply pipe 1 is blocked, and the pump 9b operates when the other water supply pipe 1 is blocked. The pump 9b is configured to stop when the

(Effects of the invention) In this invention, irrigation is switched intermittently using a directional control valve that switches the flow path of the liquid that has entered the water supply pipe in conjunction with a seedling box arrival detection sensor. It can be switched without the need for a restrictor such as a solenoid valve, and sufficient irrigation performance can be obtained even under low water pressure.

Further, since the liquid remaining in the irrigation nozzle and the water supply pipe is sucked up to the conduit side and discharged to the outside immediately after the irrigation is stopped, there is no risk of the liquid dripping from the irrigation pipe after the irrigation is stopped.

Furthermore, if the water supply to the water supply pipe is stopped after the seeding work is completed, the discharge port of the pipe is open to the outside, so all the remaining liquid in the pipe can be easily drained, which can be used during the winter during long-term storage. Damage to equipment due to freezing can be eliminated.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention.
The figure is a sectional view showing the irrigation route of the irrigation device, and FIG. 2 is a side view of a seeding machine equipped with the same device. Explanation of the main symbols in the drawings: A... Seeding machine, a...
Irrigation device, b... Seedling box transport device, c... Seedling box arrival detection sensor, 1... Water supply pipe, 2... Irrigation pipe, 5... Conduit, 5a... Discharge port, 5b... Bench lily, 6 ... Directional switching valve, 7 ... Connection pipe.

Claims (1)

[Scope of utility model registration request] In an irrigation device for a seeding machine that constitutes a water supply pipe that supplies water to an irrigation pipe, a conduit that forms an external discharge port is connected in the middle of the water supply pipe, and this communication part is connected to the water supply pipe that supplies water into the water supply pipe. A directional switching valve is provided to switch the flow path of the liquid to be introduced, and the directional switching valve is linked to a seedling box arrival detection sensor that stops the seedling box transporting device attached to the end of the seedling box transporting device of the seeding machine, When the sensor detects the arrival of the seedling box, the flow path is switched to the conduit side, and when the non-arrival is detected, the flow path is switched to the irrigation pipe side, and a bench lily is formed in the conduit, An irrigation device for a seeding machine, characterized in that a water supply pipe is connected to the irrigation pipe side from the communication portion through a connecting pipe.