JPH0221870Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fertilizer supply device for a paddy field working machine equipped with a fertilization device.

A fertilizing rice transplanter, which is an example of a paddy field work machine with a fertilizing device, has a fertilizer supply device that applies fertilizer by discharging paste-like fertilizer from a fertilizer tank into the soil from a fertilizing nozzle using a fertilizing pump at the same time as seedlings are planted. It is equipped. This type of fertilized rice planting for multi-row planting can be used in areas where the edges of planted seedlings are uneven, such as in overlapping rows when planting along ridges, or on headlands. Double fertilization will inevitably occur. This kind of double fertilization results in overfertilization, which causes fertilization and rice blast, so to solve this problem, for example, Japanese Utility Model Application Publication No. 52-41716 proposes that fertilizer be applied in a fertilizer tank and in a fertilizer pipe. It has been proposed to provide a switching valve that can switch to either one of the two.

However, the switching valve in the above publication only switches the fertilizer to either the fertilizer application pipe or the fertilizer tank, so it takes a long time to clean the fertilizer flow pipe after planting, and The drawback was that it could not be completely removed.

In other words, after planting, if left in the hose, any remaining fertilizer will solidify and cause clogging, so it needs to be cleaned and removed. For this reason, conventionally, water was poured into the fertilizer tank and the hose was cleaned by driving the fertilizer pump, but generally the discharge rate of this fertilizer pump is small, about 10/h at maximum, so it takes a considerable amount of time. It was necessary to run the fertilizer pump for a long time. However, since fertilizer has the property of separating from water and settling easily, it is virtually impossible to completely remove fertilizer from the hose even if a fertilizer pump with a small capacity and low flow rate is operated for a long time. Since it is technically impossible,
The method disclosed in the above-mentioned publication had the disadvantage that cleaning the inside of the fertilizer flow pipe after planting took a long time and the fertilizer could not be completely removed.

Therefore, in view of the conventional situation mentioned above, the present invention is
This system was devised to eliminate this drawback, and not only makes it easy to selectively stop fertilizing the fertilization nozzles of each row, but also allows for quick and complete cleaning after planting. The purpose of this project is to provide a fertilizer supply device for a paddy field working machine with a fertilization device.

The fertilizer supply device of the paddy field working machine with fertilization device of the present invention which achieves the above object is configured to supply the fertilizer in the fertilizer tank to the fertilization nozzle via the fertilization pump. A plurality of switching valves, each connected to a single return pipe communicating with the fertilizer tank, are sequentially arranged in the middle of each supply pipe that communicates with the fertilizer application nozzle in correspondence with the arrangement of the nozzles. The switching valve is configured to selectively switch the fertilization pump to the fertilization nozzle, the fertilizer pump to the reflux pipe, and the reflux pipe to the fertilization nozzle and the fertilization pump, respectively;
The reflux pipe is configured such that the reflux pipe, which is removed from the fertilizer tank, can be connected to a pressure water supply source such as a water pipe in accordance with the state in which the reflux pipe communicates with the fertilization nozzle and the fertilization pump.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to embodiments shown in the drawings.

The figure shows a riding-type rice transplanter equipped with the fertilizer supply device of the present invention, in which 1 is the rice transplanter body, wheels 2 and 3 are provided at the front and rear, and a planting part 4 is towed at the rear of the machine. It is connected. A driver's seat 5 is provided in the center of the rice transplanter main body 1, and fertilizer tanks 6, 6 are provided on both left and right sides of the driver's seat 5, respectively. 7 is a fertilizer supply port provided on the top surface of each fertilizer tank 6. The left and right fertilizer tanks 6, 6 are connected to each other at their bottoms by a pipe 8, and this pipe 8 is further connected to a plurality of flexible hoses 10 to a plurality of fertilization pumps 9 provided according to the number of planting rows. They are connected together. The plurality of fertilization pumps 9 are individually connected via a plurality of flexible hoses 11 to a plurality of indicators 12 with switching valves provided at visible positions on the side of the driver's seat 5. This indicator 12 with a switching valve has a third
As shown in the figure, a plurality of fertilization nozzles 14 are sequentially arranged in an array corresponding to the arrangement of a plurality of fertilization nozzles 14 arranged, and are further arranged in the planting section 4 via a plurality of flexible hoses 13. are linked separately to each other. In the planting section 4, a planting rod 15 for planting seedlings is provided for each row in correspondence with the fertilization nozzle 14.

The fertilizer application pump 9 is linked with a drive clutch (not shown) of the planting rod 15, and is supposed to be driven and stopped in synchronization with the driving and stopping of the planting rod 15. The fertilizer in the tank 6 is discharged from a fertilizing nozzle 14 through a supply pipe composed of a pipe 8 and flexible hoses 10, 11, and 13.

Each indicator 12 with a switching valve described above is
As shown in FIG. 3, each indicator 12 with a switching valve is connected to a single return pipe consisting of a flexible hose 16 via a connector 16b extending from each indicator 12, and this flexible hose 16 is connected to the fertilizer tank 6 in the fertilizing state. However, it is provided so that it can be removed from the fertilizer tank 6 and connected to a pressure water supply source such as a water pipe 30, depending on the cleaning state to be performed by switching each indicator 12 with a switching valve. As shown in FIG. 4, this indicator 12 with a switching valve has a valve body 20 forming a switching valve at the upper part, and a transparent cup 21 made of glass, plastic, etc. forming the indicator at the lower part. This valve body 20 and transparent cup 21
and are removably connected to each other by a nut 23 with a gasket 22 interposed therebetween.

As shown in detail in FIGS. 5 to 9, a valve 24 is rotatably fitted into the valve body 20, and can be operated from the outside by a handle 25. The valve 24 has concave passages 24a and 24b on both sides, and also has a central passage 24c that communicates with one of the concave passages 24a and exits downward. A guide piece 26 having a forked long tongue piece and a short tongue piece is fixed to the central passage 24c.
6 is adapted to rotate together when the valve 24 rotates. On the other hand, two through holes 11a and 16a are provided in the side portion of the valve body 20 corresponding to the portion where the concave passages 24a and 24b of the valve 24 are provided.
A connector 11b for a flexible hose 11 communicating with the fertilization pump 9 is connected to the through hole 16a.
A connector 16b for a flexible hose 16, which is a reflux pipe communicating with the fertilizer tank 6, is fitted into each.

In the above-mentioned apparatus, when planting work is performed while fertilizing work, the valve 24 is operated by the handle 25, and the valve 24 is brought into the state shown in FIG. In this state, the fertilization pump 9
The through hole 11a that communicates with the flexible hose 16 on the fertilizer tank 6 side faces and communicates with the concave passage 24a of the valve 24, while the through hole 16a that communicates with the flexible hose 16 on the fertilizer tank 6 side is in a closed state, so that the fertilizer pump 9 can The liquefied paste-like fertilizer passes through the concave passage 24a and the central passage 24c, then flows along the guide piece 26 through the center of the transparent cup 21 into the flexible hose 13, and is sent to the fertilization nozzle 14 at the tip. At this time, the mounting direction of the indicator 12 with a switching valve is such that the forked guide piece 26 inside the transparent cup 21 is separated to the left and right as shown in FIG. 9 when viewed from the driver's seat 5. It is desirable to do so. This is because by doing so, the operator can easily confirm that the fertilizer is being sent out in the direction of the guide piece 26.

In addition, when it is desired to stop the supply of fertilizer to the fertilization nozzles of any part of the rows during planting work on ridges or headlands, the valve 24 can be switched to the state shown in FIG. 6 by operating the handle 25. Bye. This condition shown in FIG. 6 causes the concave passage 24 of the valve 24 to
b connects the through holes 11a and 16a, and closes the concave passage 24b and the central passage 24c to the through holes 11a and 16a. Therefore, the paste fertilizer sent by the fertilization pump 9 does not flow to the transparent cup 21 side, but instead flows through the flexible hose 1.
6 and then returned to the fertilizer tank 6.
Therefore, overfertilization due to double fertilization does not occur, and this switching can be easily performed from the driver's seat.

Further, when cleaning the hose of the fertilizer supply system after finishing the planting work, the valve 24 may be switched to the state shown in FIG. 7 by operating the handle 25. In this state, the concave passage 24a of the valve 24
communicates with the through holes 11a and 16a, and simultaneously communicates with the fertilization pump 9 and the fertilizer tank 6 via the flexible hoses 11 and 16, as well as with the concave passage 2.
It will also be in a state where it is connected to the fertilizing nozzle 14 via the central passage 24c which is connected to the fertilizing nozzle 4a.

Therefore, in the above state, the pipe 17 connected to the bottom of the fertilizer tank 6 as shown in FIG.
is opened downward, the remaining fertilizer inside is discharged to the outside of the machine, and then the pipe 17 is returned to its original position and water is injected into the fertilizer tank 6. Next, the fertilization pump 9 is operated to remove the pipe 8 and the flexible hoses 10 and 11.
Also, the fertilization pump 9 itself is cleaned. After that, remove the flexible hose 16 from the fertilizer tank 6,
This is connected to a water pipe 30 or the like, and high-pressure tap water is delivered. The high-pressure tap water flows through the flexible hose 16, the indicator 12 with a switching valve, the flexible hose 13, and the fertilization nozzle 14, and can reliably clean the inside of the supply pipe, such as a bent hose, in a short time. . At this time, the tap water also flows into the flexible hose 11 at the same time, but since it is dammed up by the fertilization pump 9, it only flows through the flexible hose 11. Since tap water has a significantly higher volume and pressure than the amount of water supplied by the fertilization pump 9, cleaning is effective, and there is also the possibility that some fertilizer may settle in the slack parts of the flexible hose 13 and remain. It doesn't happen.

In addition, the above-mentioned indicator 12 with a switching valve
Since the guide piece 26 is fixed to the valve 24 side, if the transparent cup 21 is filled with fertilizer due to clogging of the fertilizing nozzle 14, etc., and it becomes necessary to clean the transparent cup 21, only the transparent cup 21 can be removed. It has the advantage that it can be easily removed for cleaning.

As described above, the fertilizer supply device of the paddy field working machine with a fertilization device of the present invention is configured to supply the fertilizer in the fertilizer tank to the fertilization nozzle via the fertilization pump. A plurality of switching valves, each connected to a single return pipe communicating with the fertilizer tank, are sequentially arranged in the middle of each supply pipe that communicates with the fertilizer application nozzle in correspondence with the arrangement of the nozzles. The switching valves are configured to selectively switch the fertilization pump to the fertilization nozzle, the fertilizer pump to the reflux pipe, and the reflux pipe to the fertilization nozzle and the fertilization pump, respectively, and the reflux pipe to the fertilization pump and the fertilization nozzle. Correspondingly, the reflux pipe that is removed from the fertilizer tank is configured so that it can be connected to a pressure water supply source such as a water pipe, so when performing fertilization work, simply switch the switching valve to connect the fertilization pump to the fertilization nozzle. Often, when you want to selectively interrupt fertilizer application from the fertilization nozzle during planting work such as along ridges or headlands, you can do so simply by switching the switching valve to the state where the fertilizer pump communicates with the return pipe. be able to.

Moreover, when cleaning the fertilizer after planting, which is performed by switching the plurality of switching valves arranged in sequence in correspondence with the arrangement of the fertilizing nozzles so that the return pipes communicate with the fertilizing nozzles and the fertilizer pump, All you need to do is connect the single return pipe removed from the tank to a water pipe, etc. This allows you to connect external pressure water flow not only into the return pipe, but also to the fertilization nozzle and the fertilizer pump, without relying solely on the fertilizer pump. Since it can be supplied, cleaning work after planting can be completed in a short period of time.

[Brief explanation of the drawing]

Figure 1 is a plan view of a fertilizing rice transplanter equipped with the device of the present invention, Figure 2 is a partially cutaway plan view of the same machine, Figure 3 is a schematic diagram of the fertilizer supply device of the present invention, and Figure 4 The figure is an exploded perspective view of the indicator with a switching valve, Figures 5 to 7 are cross-sectional views showing each state of the indicator with a switching valve, Figure 8 is a sectional view taken along line A-A in Figure 5, and Figure 9 is a cross-sectional view of the indicator with a switching valve. It is a BB sectional view of FIG. 1...Rice transplanter main body, 4...Planting section, 6...Fertilizer tank, 8...Pipe, 9...Fertilization pump, 12
...Indicator with switching valve, 10, 11, 1
3... Flexible hose (supply pipe), 14... Fertilization nozzle, 16... Flexible hose (reflux pipe), 24... Valve, 24a, 24b... Concave passage.

Claims (1)

[Scope of utility model registration request] In a fertilizer supply device configured to supply fertilizer from a fertilizer tank to a fertilizer nozzle via a fertilizer pump, each supply pipe that connects the plurality of fertilizer pumps and the plurality of fertilizer nozzles separately communicates with the fertilizer tank. A plurality of switching valves each connected to a single reflux pipe are sequentially arranged in correspondence with the arrangement of the nozzles, and the switching valves are connected from the fertilization pump to the fertilization nozzle, from the fertilizer pump to the reflux pipe, and from the reflux pipe to the fertilization pipe. It is configured to be selectively switched to communicate with the nozzle and the fertilization pump, and the reflux pipe can be removed from the fertilizer tank and connected to a pressure water supply source such as a water pipe, depending on the state in which the reflux pipe communicates with the fertilization nozzle and the fertilization pump. A fertilizer supply device for a paddy field working machine with a fertilization device configured as follows.