JPH0317611Y2 - - Google Patents

Description

[Detailed description of the invention] Conventionally, a fertilizer application device that sucks liquid fertilizer from a storage tank into a tank using a pump, and uses the pump to forcefully send the liquid fertilizer in the tank to a nozzle and spread it, is based on the pressure force required for spreading. Because the pump capacity was set to 100%, it had the disadvantage that it took a long time to suck the liquid from the storage tank.If the pump capacity was increased to eliminate this disadvantage, the cost would be higher than the utility value during spraying. As mentioned above, despite the low efficiency, the inhalation time was prolonged.

In addition, some liquid fertilizers precipitate and separate, such as slurry, urine, and lime solution, and when this is sucked out of the tank and applied, the concentration becomes uneven, and as a result, areas with excessive fertilizer and fertilizer Both methods have the drawback of causing problems in the growth of crops, and if a stirrer is installed to eliminate this drawback, the cost will further increase.

The present invention aims to provide a fertilization device for liquid fertilizer that can shorten the suction time of liquid fertilizer, utilize the pump capacity without waste, and stir the inside of the tank at low cost. The middle of the pipe connecting the switching valve A connected to the suction port and the switching valve B connected to the nozzle is connected to a tank attached to the machine frame, and one pump is connected to the switching valve A on the suction port side. When filling the tank with liquid fertilizer by inserting the tank into the connected pipe line and inserting the other pump into the pipe line leading from the switching valve A on the suction side and the tank to the switching valve B on the nozzle side. This system is characterized by a structure in which liquid fertilizer is sucked in by two pumps, and during fertilization work, one of the pumps circulates the liquid fertilizer to stir the inside of the tank.

The embodiments shown in the drawings will be explained below.
Reference numeral 1 denotes a fertilizer application device connected to the rear of the tractor 2 by a top link 3 and a pair of left and right lower links 4, 4, and is raised and lowered by a lift arm 5 via a lift rod 5a. A pair of left and right gauge wheels 7, 7 that can be raised and lowered and a rolling coulter 8, 8 are pivotally supported at the bottom, and groove rods 9, 9 and a nozzle 1 are installed behind the rolling coulter 8, 8.
A tank 11 for storing liquid fertilizer is mounted on the machine frame 6, and two switching valves A and B consisting of three-way valves are installed at the front of the tank 11. Operating levers 14 and 15 are connected to arms 12 and 13 of each switching valve A and B, respectively.

Two pumps 17 and 18 held in the body are directly mounted on the PTO shaft 16 of the tractor 2, and a suction port 20 having a strainer 19 is communicated with the switching valve A through a conduit 21. Nozzle 10
is connected to another switching valve B through a pipe 22, and the tank 1
1 through a pipe 23', and the other port a of the switching valve A on the suction port 20 side is connected to the tank 11 through a pipe 24 into which one pump 18 is inserted, and the other pump 17 is connected to the suction port It is inserted into a pipe line 25 leading from a pipe line 24 between the switching valve A on the 20 side and the pump 18 to port b of the switching valve B on the nozzle 10 side.

In the above-mentioned apparatus, when sucking liquid fertilizer into the tank 11, as shown in FIG.
0 into the urine pool 26 in the livestock house, the switching valve A connects the pipes 21 and 24, and the switching valve B connects the pipes 23 and 25, and the PTO
When the pumps 17 and 18 are driven by the shaft 16, the liquid fertilizer is simultaneously sucked by the two pumps 17 and 18. One pump 18 pumps the sucked liquid fertilizer from the pipe 24 to the tank 11, and the other pump 17 It is fed under pressure to the tank 11 through the switching valve B and the pipes 23 and 23'.

That is, since the two pumps 17 and 18 are used simultaneously to force-feed the liquid fertilizer to the tank 11, the tank 11 can be filled up in a short time.

When applying fertilizer, switch valves A and B are turned on as shown in Figure 3b.
When the pumps 17 and 18 are driven while the tractor 2 is running, the liquid fertilizer sucked out from the tank 11 by the two pumps 17 and 18 flows out from the port a of the switching valve A. The liquid fertilizer that has passed through the other pump 17 is applied to the soil from the nozzle 10 via the switching valve B, and the liquid fertilizer that has passed through the one pump 18 is sucked into the tank 11. By stirring the liquid fertilizer in the tank 11, sedimentation is prevented.

In addition, when interrupting the fertilization work, switch the switching valve B to close the nozzle side ports c and e as shown in Fig. 3c, and the liquid fertilizer in the tank 11 will flow through the pump 18 to the tank 11. Since it circulates, precipitation within the tank 11 can be prevented.

As mentioned above, this invention connects the switching valve A connected to the suction port and the switching valve B connected to the nozzle to a tank attached to the machine frame, and connects one of the pumps to the suction valve. Insert the pump into the pipe line connecting the switching valve A on the inlet side and the tank, and insert the other pump into the pipe line leading from the switching valve A on the suction side and the tank to the switching valve B on the nozzle side to pump liquid fertilizer. When filling the tank with liquid fertilizer, two pumps are used to suck it in, and during fertilization work, one pump circulates the liquid fertilizer and stirs the inside of the tank, so when filling the tank with liquid fertilizer, two pumps are used. Two pumps are used to inhale and fill the fertilizer in a short period of time. During fertilization, one pump returns the liquid fertilizer to the tank to prevent it from settling, while the other pump always applies fertilizer at a uniform concentration from the nozzle. Therefore, there will be no areas where there is too much fertilizer or areas where there is insufficient fertilizer, and the crops can grow uniformly and favorably.

Moreover, no stirring device is required, and the capabilities of the two pumps can be fully utilized, reducing costs relative to the total amount of work.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention,
Figure 1 is a side view of the fertilizer application device attached to the tractor.
Figure 2 is a front view of the same as above, and Figures 3a, b, and c are piping diagrams.

Claims (1)

[Scope of utility model registration request] The middle of the pipe connecting the switching valve A connected to the suction port and the switching valve B connected to the nozzle is connected to a tank attached to the machine frame, and one pump is connected to the switching valve A on the suction port side. When filling the tank with liquid fertilizer by inserting the tank into the connected pipe line and inserting the other pump into the pipe line that runs from between the switching valve A on the suction side and the tank to the switching valve B on the nozzle side. A fertilization device for liquid fertilizer, characterized in that it is configured so that suction is carried out by two pumps, and during fertilization work, the liquid fertilizer is circulated by one pump to agitate the inside of the tank.