JPH0691772B2 - Fertilizer application equipment for passenger paddy field vehicles - Google Patents

Description

Description: (a) Industrial field of application The present invention relates to a fertilizer application device for a riding paddy work vehicle such as a riding rice transplanter and a riding paddy field 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 back and to prevent the fertilizer from flowing down when the fertilizer application is stopped.

(B) Conventional Technology As shown in FIGS. 6 and 7, a rice transplanter 1 equipped with a conventional fertilizer application apparatus has fertilizer tanks 3, 3 arranged on the left and right sides of a 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 along 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 further in the sub tank 11. It is branched into a large number of hoses 12, which are respectively sucked into the rotor pump 13, and further discharged from the discharge ports of the respective pumps to the indicators 20 through the respective hoses 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, 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 is pumped up from the lower pumping device 13 to the side of the driver's seat 2 and then to the nozzle 9.
For this reason, the hose piping intersects 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 above-mentioned conventional fertilizer application has a drawback that the fertilizer in the indicator 20 and the hose 21 at the time of its operation is naturally flown down from the nozzle 9 to cause uneven fertilization.

(D) Means for Solving Problems The present invention is intended to solve the above problems, and as shown in FIGS. 1 to 4, the flow of fertilizer is substantially linear. So that the fertilizer tank 32, the fertilizer pump device 40, and the fertilizer nozzle 46 are sequentially arranged from the front to the rear of the traveling machine body 25 so as to be gradually lowered, and the fertilizer pump device is used for fertilizer. In the pipeline to the nozzle, the detachable parts 47, 49 are interposed at a position higher than the float,
In addition, a preload valve 45 is arranged in the attachment / detachment portion so as to generate a set pressure for the fertilizer flowing when the fertilizer application is in operation.

(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
Is further guided to the nozzle 46 through the preload valve 45 based on the rotation of the pump device 40, and the fertilizer is applied in a streak shape.

Then, when the fertilizer application is stopped, the preflow valve 45 prevents the natural flow of fertilizer due to the natural flow-prevention action, and at the time of clean fertilizing work, the fertilizer pressure provided by the preload valve 45 causes the fertilizer nozzle 46 to drop below the float 50. Fertilizer is applied to the soil.

(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, it is led from the pump device 40 to each fertilizer flow detection sensor 42 and the switching valve 38 arranged side by side in the width direction of the machine body through the hoses 41 ... It is guided to the nozzle 46 in the vicinity of the planter 6 via a preload valve 45 which generates a set pressure on the fertilizer flowing when 43 and the fertilizer applying device are in operation. And these pump devices 4
0, 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 32, 40, 42, 38, 45, 46 is a fertilizer flow. In accordance with the above, it is arranged in a substantially linear shape so that the position gradually becomes lower from the front to the rear of the aircraft.

As shown in detail in FIG. 3, the preload valve 45 has an inlet 47a of the valve body 46 connected to the downstream end of the hose 43 through an appropriate joint 49, and is orthogonal to the inlet 47a. The outlet portion 47b opened in the direction to be connected is connected to the upstream end of the nozzle 46 by welding or the like, and as shown in FIG. 2, the hose 43 can be easily routed with respect to the direction of the nozzle 46 when piping. And further, as shown in FIG.
The preload valve 45 can be attached to the float 50 integrally with the nozzle 46, and the tip of the nozzle 46 projects below the float 50. Further, the fertilizer flow of a predetermined pressure or more flowing through the hose 43 is passed to the nozzle 46 side, and the fertilizer flow of the predetermined pressure or lower is shut off so that the inlet portion such as a relief valve or a safety valve is provided inside the valve body 47. It has a valve body 52 biased by a pressure regulating spring 51 of a predetermined pressing force toward a valve seat 47c provided at the end of 47a, and the inlet portion 47a and the outlet portion 47b are oriented in the orthogonal direction as described above. Therefore, the fertilizer flow that has pushed the valve body 52 from the inlet portion 47a does not pass through the inside of the spring 51 as much as possible, and the spring 51 portion is clogged due to sticking of fertilizer, foreign matter being caught, etc. It has a structure that prevents malfunctions. The fertilizer discharge port 46a of the nozzle 46 has a flat shape that is crushed in the vertical direction, as shown in FIGS. 3 (a) and 3 (b).

Further, as shown in detail in FIG. 4, 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, 42b is connected to the body 53 through which the fertilizer flow flows. The pressure detection holes 53a and 53b that are bored, the diaphragm 55 made of rubber or the like that is stretched so as to close the holes 53a and 53b, and the holes 55a and 56b are installed so as to overlap the diaphragm 55.
Fixed electrode plate 56 opened, the lower ends of the fixed electrode plate 56 are inserted into the holes 56a, 56b, respectively, and the lower ends thereof contact the diaphragm 55, and the upper ends thereof contact movable electrode plates 57a, 57b that contact and separate from the electrode plate 56. Spacers 59a, 59b, pressure adjusting springs 60a, 60b for giving a predetermined set pressing force to the electrode plates 57a, 57b, respectively, and terminal screw members electrically connected to the electrode plates 57a, 57b via the springs 60a, 60b. 61a, 61b, the terminal screw member 63 electrically connected to the electrode plate 56 via a spring 62, and the diaphragm 55 and the electrode plate 56 between the body 53 and the body 53, and each of the components 57a, 57b. , 59a, 59b, 60a, 60b, 61
The cover member 65 is configured to accommodate or mount the a, 61b, 62, 63.

Further, the switching valve 38 is used for stopping a part of the multi-planting at the end of the field, etc.
By switching 38, the return hose 66 (see FIG. 2) is returned to and communicated with the sub tank 67 (see FIGS. 1 and 2).

The pump device 40 is composed of a large number of screw pumps according 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 67.

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. And is supplied to the sub-tank 67 via a suction hose 39 that extends substantially linearly. 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 67 and discharges it into each hose 41, and further in a substantially linear shape toward the rear of the machine body. Flow detection sensor 42 via the hose 41 extending to
And to the switching valve 38 under pressure. Then, the fertilizer that has passed through the switching valve 38 is pressure-fed to the preload valve 45 through the hose 43 that extends in the direction of each nozzle 46 so as to incline slightly downward and spread to the left and right, and further to each nozzle. 46
As a result, fertilizer is applied to the side of the planted seedling by each planter 6 in a striped manner.

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 55 is actuated upwardly against the spring 60b, thereby causing the electrode plate 5 to pass through the spacer 59b.
7b is separated from the electrode plate 56, and is taken out, for example, via a terminal screw member 61a on the side of the high-voltage detector 42a that is in conduction with a terminal screw member 63 connected to the power supply side via a lead wire (not shown). The normal fertilization state is displayed on the monitor unit 69 (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 60a. When the pressure is equal to or higher than a predetermined pressure, the electrode plate 57a is separated from the electrode plate 56 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, clogging of the pipe is detected and displayed on the monitor 69. 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, when the fertilizer application is stopped, the fertilizer remaining in the pipe upstream of the preload valve 45 tries to flow down naturally due to its static pressure, but it is blocked by the preload valve 45 and the fertilizer is dripped from the nozzle 46. Is prevented.

Although the spring-loaded preload valve 45 as shown in FIG. 3 is used in the above-described embodiment, the preload valve 45 is used.
Instead of this, for example, a preload valve 45 'composed of an elastic valve body 70 constituted by providing a notch 70a in an appropriate elastic member as shown in FIG. 5 may be used.

(G) Effects of the Invention As described above, according to the present invention, the fertilizer tank, the fertilizer pump device, and the fertilizer nozzle are sequentially arranged in the low position to make the fertilizer flow smooth and reliable and accurate. Since the fertilizer work is possible, the preload valve is provided, so that it is possible to prevent the fertilizer from dripping from the nozzle at the time of stop and prevent the fertilizer unevenness from occurring.

Further, since the preload valve is arranged at a position higher than the float, it is possible to prevent the intrusion of mud into the preload valve to cause problems such as clogging.

Further, since the preload valve is arranged at the attachment / detachment portion of the conduit, even if a problem such as clogging occurs, the cause of the problem can be easily eliminated.

[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, and FIG. 3 is an enlarged sectional view (a) and a side view (b) thereof of a preload valve, and FIG. Is an enlarged cross section of the fertilizer flow detection sensor, and FIG. 5 is a side view (a) and a front view (b) showing another example of the preload valve. FIG. 6 is an overall side view showing a conventional riding rice transplanter with a fertilizer application device, and FIG. 7 is a rear view thereof. 21 ... Passenger paddy work vehicle (passenger rice transplanter) 25 ... Traffic machine 32 ... Fertilizer tank 40 ... Fertilizer pump device 42 ... Fertilizer flow detection sensor 42a ... High pressure detection unit 42b ... Low pressure detection unit 45 ... Preload valve, 43 ... Pipeline (Hoses) 46 ... Fertilizer nozzles, 47,49 ... Detachable parts (valve body, joint), 50 ... Float

Claims (1)

[Claims] 1. A fertilizer applicator for a passenger paddy work vehicle comprising a fertilizer tank, a fertilizer pump device, and a fertilizer nozzle, the tip of the fertilizer nozzle projecting below a float provided in a working unit, wherein: The fertilizer tank, the fertilizer pump device, and the fertilizer nozzle are arranged so as to be sequentially in the lower position, and the attaching / detaching portion is provided at a position higher than the float in the conduit from the fertilizer pump device to the fertilizer nozzle. A fertilizer applicator for a passenger paddy work vehicle, which is interposed and has a preload valve at the attachment / detachment part so as to generate a pressure set for the fertilizer flowing when the fertilizer applicator operates.