JPH0691773B2 - Fertilizer application equipment for passenger paddy field vehicles - Google Patents

Description

Description: (a) Field of Industrial Application The present invention relates to a fertilizer application device for a riding paddy work vehicle such as a riding rice transplanter and a submerged paddy soil seeder, and more specifically, a fertilizer along a traveling machine body. The present invention relates to a fertilizer application device configured to linearly flow from front to rear and to detect the flow condition of fertilizer over a wide range.

(B) Conventional Technology As shown in FIGS. 5 and 6, the rice transplanter 1 equipped with a conventional fertilizer application apparatus has fertilizer tanks 3, 3 arranged on the left and right sides of the driver's seat 2 as well as a planting machine. A nozzle 9 is installed near each planter 6 of the attachment part 5. Then, the fertilizer tanks 3, 3 are connected to a sub tank 11 near the center of the traveling machine body by a suction hose 10, and further installed under the driver's seat from the sub tank 11 through a large number of hoses 12 in accordance with the number of planted rows. Is guided to the pump 13. In the pump 13, a large number of flex rotor pumps 13a, which correspond to the number of planted threads, are arranged side by side in the machine longitudinal direction. These pumps rotate from the PTO drive shaft 15 via a power transmission device 16 such as a belt. Driven. Further, the outlets of the rotor pumps 13a are communicated with the indicators 20 installed next to the driver's seat 2 via the hoses 19 and the vicinity of the planter 6 from the indicators 20 via the hoses 21 again. Of the nozzle 9 ...

Based on the above configuration, when the pump 13 is driven in association with the planting work, the paste (or liquid) fertilizer in the fertilizer tank 3 is supplied to the sub tank 11 via the hose 10, and a large number of the sub tank 11 is further supplied. Of the pumps, each of which is sucked into the rotor pump 13 and is further discharged from the discharge port of each pump to each indicator 20 through each hose 19. As a result, the driver in the driver's seat 2 can confirm the flow of each hose by the indicator 20, and each indicator 20 guides the nozzle 9 through the hose 21 to the vicinity of the planted seedling by the planter 6. The fertilizer is applied in the form of streaks along the line.

(C) Problems to be Solved by the Invention By the way, in the conventional fertilizer application described above, the fertilizer is pumped from the tank 3 located on the side of the driver's seat 2 to the position below the driver's seat.
13 and then raised again from the pumping device 13 below to the indicator 20 on the side of the driver's seat 2 and then the nozzle 9
For this reason, the hose pipes cross vertically and horizontally, which makes the structure and mounting of the hose very complicated and causes pressure loss and flow rate loss due to bending and height difference of each hose.

Further, the indicator 20 in the conventional fertilizer application,
Only by detecting the presence or absence of the flow of fertilizer discharged by the pump device 13, when fertilizer is flowing, it was not possible to detect under what circumstances the fertilizer is flowing specifically. .

(D) Means for Solving the Problems The present invention is intended to solve the above problems, and as shown in FIGS. 1 to 4, the fertilizer tank 32 and the fertilizer pump device. A fertilizer application device for a passenger paddy field vehicle having a fertilizer nozzle 40 and a fertilizer nozzle 46, the nozzle comprising:
A preload valve 45 is disposed at an upstream position of 46, and a fertilizer flow detection sensor 42 including a high pressure detection unit 42a and a low pressure detection unit 42b is disposed in the middle of piping between the preload valve and the pump device 40,
Further, based on the detection of the high pressure detection unit and the low pressure detection unit of the fertilizer flow detection sensor, display the fertilization status on the display means 72, and between the flow detection sensor 42 and the preload valve 45 from the pump device 40. In the fertilizer application device for a passenger paddy field vehicle, which is provided with a switching valve 38 for selectively switching the flow of fertilizer to the pipe 43 communicating with the nozzle 46 or the return pipe 63 communicating with the fertilizer pump device.

(E) Action Based on the above configuration, the paste (or liquid) fertilizer is
Pump device 40 from tank 32 in front of machine body 25 due to head difference
Further, based on the rotation of the pump device 40, the nozzle 46 is passed through the flow detection sensor 42, the switching valve 38 and the preload valve 45.
It is pumped to and fertilized in the form of streaks.

Then, during the normal fertilization work, the fertilizer pressure provided by the preload valve 45 activates the low pressure detection unit 42b of the flow detection sensor 42, and it is detected that fertilization is normally performed. Further, in the above-mentioned operating state, the high pressure detecting section 42a of the flow detecting sensor 42 is operated, so that the nozzle 4
It is detected that fertilizer is clogged in 6 etc., and conversely, both the high pressure detection part 42a and the low pressure detection part 42b of the flow detection sensor 42 become inoperative, so that the disconnection of the hoses 41, 43 is detected. It Furthermore, when the switching valve 38 is switched to fertilize the fertilizer in the direction of the pump device 40, both the high and low pressure detecting portions 42a and 22b of the flow detection sensor 42 become inoperative, and in this case, the suspended state of fertilization is detected. It

(F) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The passenger rice transplanter 21 has front wheels as shown in FIG. 1 and FIG.
The vehicle has a traveling body 25 supported by a rear wheel 22 and a rear wheel 23, and the traveling body 25 has an engine at a front portion of the front wheel 22.
26 is mounted, and a driver's seat 29 is arranged so that the seat 27 is located at an intermediate portion between the front and rear wheels 22, 23, that is, a center of gravity of the machine. Further, a link 28 is provided behind the traveling body 25.
The planting section 30 is supported by a planter so as to be able to move up and down, and the planting section 30 has a large number of planters 6 ...
A long seedling stand 31 that can be placed half and a half is provided.

Further, fertilizer tanks 32, 32 for paste-like or liquid fertilizers are installed on the left and right in front of the machine body 25, and the left and right tanks 3
A hose 36 communicates through the fuselage frame 35 so as to connect the two, and a suction hose 39 extends rearward from the hose 36 below the step surface 37 of the driver's seat 29. It communicates with a pump device 40 arranged below the step surface 37 in the seat 27 portion. Further, as shown in detail in FIG. 4, the fertilizer flow detection sensors 42, which are installed side by side in the width direction of the machine, from the pump device 40 through the hoses 41 ... It is guided to the switching valve 38 and then to the nozzle 46 near the planter 6 via each hose 43 and the preload valve 45 for preventing drifting. The pump device 40, the flow detection sensor 42, the switching valve 38, the preload valve 45, and the nozzle 46 are located below the fertilizer tank 32, and each of these components 3
2, 40, 42, 38, 45, 46 are arranged in a substantially straight line so as to be gradually lowered from the front to the rear of the machine body in accordance with the flow of fertilizer.

Then, the preload valve 45 is arranged adjacent to the upstream side of the nozzle 46, is attached to the front 47 integrally with the nozzle 46, to pass the fertilizer flow of a predetermined pressure or more to the nozzle 46 side,
A valve body, such as a relief valve or a safety valve, which is urged by a spring having a predetermined pressing force so as to shut off the fertilizer flow below the predetermined pressure, is provided.

As shown in detail in FIG. 3, the flow detection sensor 42 includes a high pressure detection unit 42a and a low pressure detection unit 42b, and each of the detection units 42a and 42b is connected to a body 49 through which a fertilizer flow flows. The pressure detection holes 49a, 49b that are bored, the diaphragm 50 made of rubber or the like that is stretched so as to close the holes 49a, 49b, and the holes 50a, 51b are installed so as to overlap with the diaphragm 50.
Fixed electrode plate 51 is opened, the lower end of each inserted into the holes 51a, 51b contact the diaphragm 50, and the upper end contacts the movable electrode plates 52a, 52b contacting and separating from the electrode plate 51. Spacers 53a, 53b, pressure adjusting springs 55a, 55b for giving predetermined set pressing forces to the electrode plates 52a, 52b, respectively, and terminals electrically connected to the electrode plates 52a, 52b via the springs 55a, 55b. Screw members 56a, 56b, a terminal screw member 59 electrically connected to the electrode plate 51 via a spring 57, and the diaphragm 50 between the body 50 and the body 49, an electrode plate.
Hold 51 and hold the above components 52a, 52b, 53a, 53b, 55a, 55
The cover member 60 is configured to accommodate or mount the b, 56a, 56b, 57, 59.

Further, the switching valve 38, as shown in FIG.
A valve body 61 that can be inserted into and connected to the body 49 of the flow detection sensor 42 is provided, and the fertilizer flow from the sensor 42 side to the nozzle 46 direction or the return pipe 63 is provided inside the body 61 by rotating the operation lever 62. Through sub-tank 71 direction,
Furthermore, the return pipe 63 and the pipe 43 facing the nozzle 46.
A cock member 65 that rotates so as to communicate with is provided. Then, as shown in FIG. 4, one end side (70) is provided on each side of the switching valves 38, 38 ...
b) is fixed to the bar member 66 and the other end side (70a) is rotated around the shaft 67, and the normal switching valve 3 is provided by the springs 69a and 69b stretched between the bar member 66 and the fixed portion.
Arm members 70a, 70b are arranged so as to be urged in the directions of 8, 38 ..., and the arm members 70a, 70b are rotated to move the arm members 70a, 70b as shown by the chain double-dashed line in FIG. The operation lever 62 is rotated in the A → C direction by reversing the biasing force of the springs 69a, 69b to the 70a, 70b and releasing the engagement of the bar member 66 with the contact portion 62a of the operation lever 62. The switching valve 38 can be operated so that it can be switched to a state in which the return pipe 63 and the pipe 43 facing the nozzle 46 can communicate with each other.

The pump device 40 is composed of a large number of screw pumps corresponding to the number of threads to be planted, and these screw pumps are annularly arranged on the same circumference with their suction sides facing the sub tank 71 (see FIGS. 1 and 2). ing.

Since the present embodiment is configured as described above, the paste-like or liquid fertilizer injected into the fertilizer tanks 32, 32 installed at the front of the fuselage is directed toward the hose 36 and the rear of the fuselage based on the head difference. It is supplied to the sub-tank 71 through a suction hose 39 that extends in a substantially straight line. Then, with the start of the planting work, the pump device 40 is driven, and each screw pump of the pump device 40 sucks the fertilizer in the sub-tank 71 and discharges it to each hose 41, and further linearly extends toward the rear of the machine. The pressure is fed to the flow detection sensor 42 and the switching valve 38 via the hose 41 extending to the. The fertilizer that has passed through the switching valve 38 at the A position of the lever 62 in FIG.
The pressure is fed to the preload valve 45 through the hose 43 extending in the direction of each nozzle 46 so as to incline slightly downward toward the rear and spread to the left and right.
The fertilizer is applied to the side of the planted seedlings by streaks.

During normal fertilization work, the fertilizer pressure provided by the preload valve 45 causes the low pressure detection unit 42b of the flow detection sensor 42 to operate.
The diaphragm 50 is actuated upward against the spring 55b, thereby causing the electrode plate 5 to move through the spacer 53b.
2b is separated from the electrode plate 51, and is taken out, for example, via a terminal screw member 56a on the side of the high-voltage detector 42a that is in conduction with a terminal screw member 59 connected to the power source side via a lead wire (not shown). The normal fertilization state is displayed on the monitor unit 72 (see FIG. 1) arranged in front of the driver's seat 29 by the electric signal. Further, in the above operating state, when the fertilizer is clogged in the nozzle 46 or the like for some reason and the fertilizer stops flowing, the pressure in the pipe increases due to the stagnation of the fertilizer flow, and the pressure is set by the spring 55a. When the pressure becomes equal to or higher than a predetermined pressure, the electrode plate 52a is separated from the electrode plate 51 in the high pressure detection unit 42a of the flow detection sensor 42 similarly to the operation of the low pressure detection unit 42b, and in this case, from the high and low pressure detection units 42a and 42b. Since neither electric signal is generated, it is detected that the pipe is clogged and is displayed on the monitor 72. On the contrary, if the hoses 41 and 43 are disconnected and the fertilizer in the pipe leaks from the part other than the nozzle 46, the fertilizer pressure in the pipe falls below the pressure set by the preload valve 45. ,
In this case, both the high pressure detection unit 42a and the low pressure detection unit 42b of the flow detection sensor 42 are in a conductive state, and both detection units 42a, 42b generate an electric signal together, causing a trouble such as disconnection in the pipe. Is displayed on the monitor 72. Further, the switching valve 38 is changed from A to B by the operator's operation.
When the fertilizer is recirculated to the sub-tank 71 and is recirculated to the sub-tank 71, the pressure inside the pipeline becomes extremely low.
Both become conductive, and in this case, the switching valve 38
The fact that the fertilizer application is switched to the position is also detected by a switch means (not shown) or the like, which causes the monitor section 72 to display that the fertilizer application is in a recirculation state and is interrupted.

When the fertilizer application is completed and the fertilizer applicator is washed, water is injected into the empty tank 32 and first the pump 40 is operated for a short period of time in the normal fertilizer application mode so that the pump 40, the pipe
41, the flow detection sensor 42, etc. are washed, then the arm member 70a,
70b is rotated so that the contact portion 62a of the operation lever 62 moves to the bar member 66.
When the lever 62 is rotated from A to C after not contacting with the pipe, the cock member 65 communicates with the return pipe 63 and the pipe 43 directed toward the nozzle 46, so that the wash water naturally flows from the tank 32. The return pipe 63, the pipe 43, the preload valve 45, the nozzle 46, etc. are cleaned.

(G) Effect of the Invention As described above, according to the present invention, the preload valve 45 is arranged at the upstream position of the nozzle 46, and the preload valve 45 and the pump device are arranged.
A fertilizer flow detection sensor 42 including a high pressure detection unit 42a and a low pressure detection unit 42b is provided in the middle of the pipe with 40, and the sensor 42
Since the switching valve 38 for selectively switching the flow of fertilizer from the pump device 40 to the nozzle 46 direction or the recirculation direction is provided between the preload valve 45 and the preload valve 45, the fertilizer from the nozzle 46 is discharged when the fertilizer application is stopped. In addition to being able to reliably prevent runoff, it is possible to detect when the fertilizer applicator is operating, such as when the fertilizer is clogged with the nozzle 46, normal fertilizer application, fertilizer interruption due to reflux, and hose disconnection. It becomes possible to detect over a wide range, and work efficiency can be greatly improved.

[Brief description of drawings]

FIG. 1 is an overall side view showing a riding rice transplanter to which the present invention is applied, FIG. 2 is a plan view thereof, FIG. 3 is an enlarged side view of essential parts, and FIG. 4 is a plan view thereof. FIG. 5 is an overall side view showing a conventional riding rice transplanter with a fertilizer application device, and FIG. 6 is a rear view thereof. 21 ... Passenger paddy work vehicle (passenger rice transplanter) 25 ... Traveling machine 32 ... Fertilizer tank 38 ... Switching valve 40 ... Fertilizer pump device 42 ... Fertilizer flow detection sensor 42a ... High pressure detection unit 42b ... Low pressure detection unit 45 ... Preload valve 46 … Nozzle for fertilizer 72… Display means (monitor)

Claims (1)

[Claims] 1. A fertilizer application device for a passenger paddy field vehicle comprising a fertilizer tank, a fertilizer pump device, and a fertilizer nozzle, wherein a preload valve is disposed upstream of the nozzle, and the preload valve and the above A fertilizer flow detection sensor consisting of a high pressure detection unit and a low pressure detection unit is arranged in the middle of piping with the pump device, and further,
The fertilizer application status is displayed on the display means based on the detection by the high pressure detection unit and the low pressure detection unit of the fertilizer flow detection sensor, and the flow of fertilizer from the pump device is displayed between the flow detection sensor and the preload valve. A fertilizer application device for a passenger paddy work vehicle, which is provided with a switching valve for selectively switching to a pipe communicating with a nozzle or a return pipe communicating with the fertilizer pump device.