JPH0445462Y2 - - Google Patents

Description

[Detailed description of the invention] (1) A tank and a pump 10 are connected through a flow path for pasty fertilizer, and the paste fertilizer in the tank is force-fed to a fertilization section by the pump 10 to fertilize a field. In the fertilizer applicator, a filter 40 having a protrusion formed in the flow path of the paste fertilizer in a direction opposite to the flow direction of the paste fertilizer and having a smaller diameter than the inner circumferential surface of the flow path is inserted. A filter for a paste fertilizer applicator that is characterized by:

(2) Configure the tank as a fertilizer tank A into which a fertilizer bag is placed, and connect the paste fertilizer flow path that connects the tank and the pump 10 to an upstream hose, a subtank B, and a downstream hose in sequence. The paste according to claim 1, wherein the filter 40 is protruded in a direction opposite to the flow direction of the paste fertilizer and is interposed at the connection between the upstream hose in the flow path and the sub-tank B. Filter of fertilizer applicator.

[Detailed description of the invention] (a) Industrial application field The present invention relates to a filter for a fertilizer applicator that applies paste fertilizer to fields.

(b) Prior Art Conventionally, fertilizer applicators for pasty fertilizer supplied fertilizer directly from the fertilizer tank to the pump without intervening a filter.

(c) Problems to be solved by the invention Since the above-mentioned known fertilizer applicator directly supplies paste fertilizer from the fertilizer tank to the pump, if crystals form in the paste fertilizer, they will be sucked into the pump. The pump wore out rapidly.

(d) Means for solving the problem The present invention connects a tank and a pump through a flow path for pasty fertilizer, and uses the pump to forcefully feed the pasty fertilizer in the tank to the fertilization section to fertilize the field. In the fertilizer applicator, a filter 40 having a protrusion formed in the flow path of the paste fertilizer in a direction opposite to the flow direction of the paste fertilizer and configured to have a smaller diameter than the inner circumferential surface of the flow path. The crystals generated in the paste fertilizer are filtered by the filter, and the crystals that are not attached to the peripheral surface of the filter are removed by the flow of the paste fertilizer between the filter and the inner peripheral surface of the flow path. The above-mentioned problem was solved by preventing the filtering performance of the filter from deteriorating by depositing it at the base of the recess.

(e) Effect The paste fertilizer in the tank flows through the flow path by the suction action of the pump, and when it passes through the filter, the crystals in the paste fertilizer adhere to the outer peripheral surface of the filter and are removed.

At this time, the crystals adhering to the outer peripheral surface of the filter are subsequently swept away by the flowing paste fertilizer and deposited at the base of the recess formed by the filter and the inner peripheral surface of the flow path, and the crystals adhere to the outer peripheral surface of the filter. Almost the entire surface maintains good filtration action.

(F) Embodiment To explain an embodiment of the present invention about a riding fertilizing rice transplanter shown in the drawings, 1 is a vehicle body having front wheels 2, 2 and rear wheels 4, 4 pivotally supported by swing chain cases 3, 3. With engine 5 installed in the front,
The planting device 7, which is attached with the fertilizer pipe 6 which becomes the fertilizer application section at the rear, is connected to the upper link 8 and the lower links 9, 9.
The pump 10 provided on the side of the vehicle body 1 is driven via a shaft 12 from a planting transmission case 11 and a transmission case 13.

Then, on both sides of the driver's seat 14, the bottom of the fertilizer tank A is connected to a sub-tank B (approximately the same capacity as a conventional fertilizer tank), and the fertilizer tank A and the pump 1 are connected to each other.
The pump 10 is connected to the fertilizer tank A, which has a distribution section, through a bellows-shaped suction hose 15, which forms an upstream flow path and a fertilizer flow path connecting the fertilizer tank A and the pump 10. 10 is connected to the sub-tank B by an introduction hose 16 that constitutes a downstream flow path of the fertilizer flow path, and the discharge port is connected to the fertilization pipe 6 by a pressure feed hose 18 having an indicator 17 in the middle. It is connected to the.

Further, the fertilizer tank A has a flat bottom and an open upper part, and the edge of the opening is formed into an arcuate rib 19, and the housing C' of the extrusion device C has a flat top and an open bottom. The opening edge is formed into an arcuate rib 20, one side of the housing C' is hinged to one side of the fertilizer tank A so as to be openable and closable with a hinge 21, and the other side is attached and detached with a clamp 21a. It is possible to attach it.

Further, the extrusion device C supports movable bodies 24, 24 on a pair of left and right guide rails 22, 22 with guide rolls 23, . is support rod 2
5, 25 and elastic devices 26, 26, an extrusion roller 27 whose peripheral surface is attached with an elastic material such as rubber or synthetic resin is supported so as to be in pressure contact with the bottom plate of the fertilizer tank A. Wires 32, 32 connecting pins 29, 29 provided at both ends of the support frame 28 and pins 31, 31 provided in the middle of the bracket 30 are routed around a support plate 33 fixed to the front part of the housing C'. A plurality of fixed pulleys 34 rotatably supported by a shaft and a plurality of movable pulleys 35 rotatably supported by the bracket 30 are sequentially mounted, and the bracket 30 is connected to a receiving plate 36 at the rear of the housing C'. The bracket 30 is connected under tension by a plurality of coil springs 37, and the bracket 30 is supported by two guide plates 38 having elongated holes in the front and back direction so that it does not move up and down but can move back and forth. When the rod 24a connecting the upper ends of the movable bodies 24 and 24 moves the extrusion roller 27 backward, the lever 39
The coil springs 37 are set in the stretched state by engaging the hooks at the tips of the coil springs 37. Further, the sub-tank B is provided with a float 39a at the front to display the height of the liquid level.

5 and 6, a filter 40 is attached to the terminal end of the suction hose 15 that connects the discharge port a of the fertilizer tank A and the inlet port b of the sub-tank B.
The flange 40a at the base is attached to the inlet b of the sub-tank B, and the protrusion protrudes in the direction opposite to the flow direction of the paste fertilizer, that is, toward the inside of the suction hose 15.
A concave portion formed by an inner circumferential surface of the filter 40 and an outer circumferential surface of the convex portion of the filter 40 having a smaller diameter than the inner circumferential surface is formed in a reservoir portion.

Further, the fertilizer bag 41 containing the paste fertilizer is made of synthetic resin, and its outlet 41a has a flange 41b as shown in FIG. 7, and the suction hose 1
The upper end of the fertilizer bag 41 has a circumferential groove 15a on the upper inner circumferential surface in which the collar 41b engages and an upward circular groove 15b in which the mouth edge of the outlet 41a fits. As shown in Figure 8, suction hose 1
When the upper part of 5 is pulled out and the outlet 41a is pushed in, the collar 41b is inserted into the circumferential groove 15a and the outlet 41a is pushed in.
Since the mouth edges of each fit into the circular grooves 15b,
Fertilizer leakage can be prevented.

Furthermore, since the discharge port 42 of the sub-tank B is equipped with a check valve 43 as shown in FIG. 2, when the field is narrow and it is sufficient to use only the fertilizer tank A and sub-tank B on one side, The paste fertilizer does not flow back into the empty sub-tank B on the other side, and the pressing force of the extrusion device C in the fertilizer tank A on one side is not reduced.

In the above-mentioned fertilizer applicator, when supplying paste fertilizer, after opening the extrusion device C, put the fertilizer bag 41 into the fertilizer tank A, and push the outlet a into the upper part of the suction hose 15 to connect it. The bottom side is placed on the rear rib 19 of the fertilizer tank A as shown in FIG. 2, and when the extrusion device C with the extrusion roller 27 set at the rear is closed and locked with the clamp 21a, the fertilizer bag is removed. The bottom of 41 is held between the upper and lower ribs 19 and 20.

When the sub-tank B is empty in this state, the paste-like fertilizer in the fertilizer bag 41 is squeezed out by the movement of the extrusion roller 27 of the extrusion device and flows into the sub-tank B.

At this time, the crystals in the paste fertilizer are filtered by the filter 40, and the crystals that try to adhere to the outer peripheral surface of the filter 40 are subsequently washed away by the flowing paste fertilizer and filtered by the filter 40 as shown in FIG. It accumulates at the bottom of the recess formed with the suction hose 15, that is, the flange 40a, and is extremely unlikely to adhere to the circumferential surface of the filter 40.

Further, the extrusion roller 27 is connected to a fixed pulley 34...
Since it is pulled by the coil spring 37 through the movable pulley 35 and the wire 32, the extrusion roller 27 moves forward together with the moving body 24 while being guided by the guide rails 22, 22 and the guide roll 23. In the meantime, the paste-like fertilizer is extruded from the fertilizer bag 41 and flows into the sub-tank B, and when the inflow is finished, the fertilizer bag is replaced again and set so that it can be extruded.

Furthermore, if the sub-tank B is almost full and only the fertilizer tank A is empty, the work can be carried out by simply replacing the fertilizer bag in the fertilizer tank A, and during the fertilization work, the extrusion device C Since the fertilizer bag is squeezed and energized, the paste-like fertilizer in the sub-tank B is pressurized, and the suction action of the pump 10 is promoted.

At that time, the extrusion roller 27 is operated by a plurality of fixed pulleys 3.
4... and a movable pulley 35... and a coil spring 37 via wires 32, 32 wrapped around them.
The coil spring 3 is pulled by...
The expansion and contraction stroke of 7... is small as shown in the upper and lower parts of Fig. 3, and the coil spring 37...
Fertilizer tank A can minimize changes in tension in...
The extrusion roller 27, which moves widely from the rear end to the front end, can be reliably extruded throughout the entire stroke.

Moreover, since a large number of coil springs 37 are used, the entire extrusion roller 27 can be moved strongly and with an average pressing force.

Furthermore, as the paste-like fertilizer in the fertilizer tank A decreases, the movable bodies 24, 24 move forward, and when it reaches the front end, it indicates that the fertilizer bag 41 is empty, so the movable bodies 24, 24 displays the content as a gauge, and the remaining amount of sub-tank B is visually confirmed by float 39a, and when the paste fertilizer in sub-tank B becomes low and the aircraft reaches a place where fertilizer is placed, such as along a ridge. , open the extrusion device C, take out the empty fertilizer bag 41, pull the extrusion roller 27 backwards, set it with the lever 39, replace it with a new fertilizer bag 41, fill the sub tank B, and add another bag to the fertilizer tank. A, close the extrusion device C, remove the lever 39, and restart the work.

Since the paste fertilizer in the sub-tank B is applied from the time the paste fertilizer in the fertilizer bag 41 is used up to the time it is replenished, there is no need to interrupt the work in the middle of the fertilization process, and there is no need to interrupt the fertilizer application process. If the area to be fertilized is small, you may not need to replenish the area and apply what remains in sub-tank B, or if only sub-tank B is full and one more bag will be enough to finish fertilizing the field, replace the bag in fertilizer tank A. Let's do it.

(G) Effect of the invention Since the invention is configured as described above, the paste fertilizer sucked into the pump 10 from the tank is filtered by the filter 40 in the flow path, and the crystals in the paste fertilizer are sucked into the pump. This prevents pump wear and tear.

Moreover, the crystals that try to adhere to the outer circumferential surface of the filter 40 are subsequently washed away by the flowing paste-like fertilizer and deposited on the bottom of the recess formed by the inner circumferential surface of the channel and the filter 40. , it is possible to prevent the filtration performance of the filter 40 from deteriorating.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Figure 1 is a cross-sectional view of the fertilizer tank, sub-tank, and extrusion device, Figure 2a is a partially cutaway side view of the same, Figure b is a cross-sectional view of the fertilizer bag locking part, and Figure 3 is the drive unit of the extrusion device. Figure 4 is a side view of the riding fertilizer application rice transplanter, Figure 5 is a sectional view of the filter attachment part, Figure 6 is a sectional view of the main parts, and Figure 7 is a fertilizer bag with the top and bottom sides overlapped. FIG. 8 is a cross-sectional view showing the fitted state of the outlet of the fertilizer tank and the discharge port of the fertilizer tank, and FIG. 8 is a side view showing the above-mentioned fitting operation. A...Fertilizer tank, B...Sub tank, C...
Extrusion device, 6...Fertilization pipe, 10...Pump, 27
...Extrusion roller, 32...Wire, 34...
Fixed pulley, 35... Moving pulley, 37... Coil spring, 40... Filter.