JP2580329Y2 - Fertilizer pump mounting structure for mobile farm machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a fertilizing pump in a mobile farming machine such as a rice transplanter for planting a plurality of shoots collectively and applying side fertilizer for each planting line.

[0002]

2. Description of the Related Art Conventionally, fertilizer transplanters that simultaneously perform seedling transplantation and lateral fertilization have been used in order to enhance the initial growth of seedlings and stably produce high-quality crops, and further increase fertilization efficiency and prevent water pollution. For this purpose, a paste fertilizer has been used in which a highly viscous paste-like liquid fertilizer is discharged into soil through hoses and nozzles by a plurality of pumps corresponding to each planting streak to perform side fertilization. Then, the paste fertilizer apparatus guides the liquid fertilizer in the fertilizer tank installed in the front part of the body by a hose to the sub-tank in the lower part of the body, opens an inlet on the rear surface of the sub-tank, and has the same number as the number of planting strips driven simultaneously. The pump is configured to continuously discharge liquid fertilizer from nozzles provided below the planting section at the rear of the machine and located in the soil on the side of individual shoots through hoses connecting the individual pumps and the corresponding nozzles. Have been.

[0003] In addition, the conventional fertilizer application pump is configured such that the suction ports of the individual pumps are directed forward along the front-rear flow of liquid fertilizer from the fertilizer tank at the front of the machine to the nozzle at the rear of the machine.
The fertilizer application pumps are mounted on the rear of the sub-tank so that the liquid fertilizer is supplied evenly, with the discharge ports facing the rear of the sub-tank. Was open to.

[0004]

[Problem to be solved by the invention] By the way, even if the fertilizer in the fertilizer tank is used up during the planting operation of the seedling, the fertilizer still remains in the sub-tank, so the planting operation can be continued. As described above, since the suction ports of the individual pumps have a stepped shape and are open to the rear surface of the sub-tank as described above, when the amount of liquid fertilizer in the sub-tank decreases and the level of the liquid level decreases, The suction port of the pump arranged at the top will be located higher than the liquid level, and the inhalation of liquid fertilizer will be impossible and the amount of suction will decrease, causing the fertilizer to run out earlier than the pump arranged below and not being fertilized Planting streaks occur. For this reason, even if the fertilizer still remains, the loaded fertilizer cannot be used up and the efficiency is low. Also, liquid viscous paste fertilizer has properties intermediate between solid fertilizer and liquid fertilizer, liquid fertilizer may be separated into solid component and liquid component in the sub-tank due to improper handling etc. When the liquid fertilizer separates, the quality of the liquid fertilizer differs between the upper and lower layers in the sub-tank, and the liquid fertilizer is sucked into the upper and lower pumps and discharged from the nozzle for each planting strip. There may be a difference in quality. As a result, the growth of crops may become uneven and immature crops may remain during the harvest season, leading to instability of the yield and loss of yield. is there.

[0005]

SUMMARY OF THE INVENTION A mounting structure for a fertilizer application pump for a mobile agricultural machine according to the present invention has been developed based on the above-described situation, and has a plurality of suction ports opened to a sub-tank communicating with a fertilizer tank. In the fertilizer pump device that simultaneously drives a plurality of fertilizer pumps separately attached to the mouth and feeds fertilizer to nozzles corresponding to individual planting streaks of the crop, the suction port of each fertilizer pump is connected to the bottom of the sub tank. And the fertilizer application pump is configured to be mounted downward.

[0006]

The liquid fertilizer that has flowed into the sub-tank is discharged downward through the suction ports of the individual pumps opened on the bottom surface, and sent out to the nozzles via the hose. Since the liquid level of the liquid fertilizer in the sub tank and the suction port of each pump that opens to the bottom surface are parallel, the fertilizer can be used up to the end without lowering the liquid level and causing a bias in the suction volume of each pump. In addition, there is no difference in the quality of the liquid fertilizer sucked by the individual pumps due to the sedimentation due to the separation of the liquid fertilizer.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be described by way of an example of a 6-row riding fertilizer paddy planter shown in the drawings. The entire fertilizer rice transplanter 1 is composed of a running body 4 supported by front and rear wheels 2, 3, an engine 5, a fertilizer tank 6, etc., a body front 8 provided with a handle 7, a PTO drive shaft 9, and a suction unit. The floor portion 11 containing the hose 10 and the like, the body rear portion 15 containing the hydraulic device 12 and the fertilizing pump device 13 and the like and the seat 14 and the like, and the six hoses (fertilizing hose) 16. It is constituted by a planting section 22 which is attached to be able to move up and down via a supporting up and down link 17. And planting part 2
Numeral 2 denotes a seedling stand 18 for six rows, six sets of planting rods 19 ... three floats 20 ..., six nozzles (fertilizer nozzles) 2
1 and so on.

[0008] The fertilizing rice planting work is performed by the planting section 2
2 are supported on the soil surface by floats 20..., And while the traveling section 4 is advanced, the seedlings of the seedling stand 18
················································································································· ６ Liquid fertilizer in the form of paste is applied inside.

[0009] The overall configuration of the fertilizer applicator is as follows. The bottom of the fertilizer tank 6 attached to the left and right sides of the body front part 8 is communicated with a communication hose (not shown), and the suction hose 10 is connected to the communication hose and passes through the left side of the lower surface of the floor 11. Accordingly, the side of the intermediate case 23 of the fertilizer pump device 13 attached to the lower left portion of the lower part of the machine body 15 communicates with the sub tank 24.

[0010] In the middle of the six fertilizing hoses 16 ...
In the middle of the left lower link 17a of the hitch 17, an indicator 16a provided with a sensor for monitoring the flow state of the liquid fertilizer for each planting streak, a fertilizer switch, a switching lever for a fertilizer hose, and the like is provided. And each fertilizer hose 16
..Six nozzles 21 for each planting strip connected to the rear end
Are attached to the left and right sides of each of the three floats (one center float and two side floats) 20... Of the planting portion 22, and the tips are below the lower surfaces of the floats 20. The fertilizer is provided so as to protrude into the soil at a predetermined depth from the rice field. Further, a return hose 16b for returning the liquid fertilizer to the sub-tank 24 with a fertilizer or the like is attached to the indicator 16a.

The fertilizer application pump device 13 includes a pump drive device 2
Upper case 28 in which a plurality of cylindrical pumps 26 are provided.
, And a flat cylindrical intermediate case 23 sandwiched between the upper case 28 and the lower case 25.
, The upper surface of the lower case 25, and the side surface of the intermediate case 23, and the upper surface of the lower case 25 is a bottom surface 24a of the sub tank 24.

The suction ports 26a of the individual pumps 26 are annularly opened on the bottom surface 24a of the sub tank 24, and the discharge ports 26b are formed at the lower ends of the pumps 26. . Are provided, and hoses 16... Connected to the nozzles 21.

The pumps 26 are driven by a pump transmission 29 connected to the PTO drive shaft 9 and an output side 2 of the transmission 29.
The power is transmitted to a pump driving device 27 in an upper case 28 located below the device via a conversion device 30 that changes the direction downward by a pair of bevel gears 29b connected to 9a.

At the center of the pump driving device 27, a gear 27a which is supported by the lower surface of the upper case 28 is provided horizontally.
Six gears 27b meshing with each other are arranged on the circumference, and each gear 27b.
Pump drive shafts 27 supported on the upper and lower surfaces of the pump
.., and the upper end of one of the pump drive shafts 27 ′ c is extended into the direction changing device 30 to form a shaft 30 a of the direction changing device 30. The lower end of each pump drive shaft 27′c, 27c.
4 and is connected to the upper ends of the rotor shafts 31 of the respective pumps 26 via the joints 31a in the middle of the sub tank 24 and above the lower case 25.

Each of the cylindrical pumps 26 projecting downward from the lower surface 25a of the lower case 25 has a female screw cylindrical stator 31b and a male screw which performs eccentric rotational movement with respect to the stator 31b. The rotor 31c has a rod-like shape.
5 is fixed to the lower surface 25a. The bottom surface 2 of the sub tank 24 around the rotor shaft 31 penetrating the lower case 25
4a are opened, and the outlets 26b are opened.
Open at the lower end of the cover 31d of the pump 26. Each of these pumps 26 rotates the stator 31b inside the stator 31b so that the stator 31b rotates.
b and the fixed space formed by the threaded portion of the rotor 31c move downward from above, so that the suction port 26 at the upper end
This is a constant capacity pump that sucks liquid fertilizer from a and discharges it to a discharge port 26b at the lower end.

In such a configuration, the pasty liquid fertilizer stored in the fertilizer tanks 6 on the left and right sides of the body front portion 8 is connected to the communication hose and the communication hose by the flowability of the pasty liquid fertilizer and the level difference of the liquid level. After passing through the suction hose 10, it is guided from the side surface of the sub-tank 24 of the fertilizer application pump device 13 at the rear part of the machine body 15 and stays in the sub-tank 24.

When the planting operation is started, the driving force transmitted to the pump transmission 29 by the PTO drive shaft 9 is directed downward by the bevel gears 29b and 29b of the direction changing unit 30 provided on the output side 29a of the pump transmission 29. By changing the direction, the pump drive shaft 2 located below the pump transmission 29 is changed.
7′c and the pump drive shaft 2
7'c gear 27'b through the central gear 27a of the pump driving device 27, five gears 27b individually meshing with the circumference, and the other five pump driving shafts 27c
, And the rotor shafts 31 connected via the joints 31a at the lower ends of the pump drive shafts 27′c, 27c.

The rotor 31c of each pump 26 performs an eccentric rotation with respect to the stator 31b, so that the suction port 26 around each rotor shaft 31 on the sub tank bottom surface 24a.
a, the liquid fertilizer in the sub-tank 24 is sucked in, the liquid fertilizer is sequentially sent downward in the axial direction, and the respective fertilizer application hoses 16 connected to the discharge port 26b provided in the cover 31d of the pump 26 at the lower end in the axial direction.・ Send liquid fertilizer to

The liquid fertilizer sent from each pump 26... Passes through each fertilizing hose 16... And passes through an intermediate indicator 16 a, and is fixed to the float 20. ... It is discharged into the soil on the side of the seedlings, and lateral fertilization is performed in parallel with planting of the seedlings.

The present invention is configured as described above, and the mounting of the conventional fertilizer pump device 13 is changed from a horizontal direction to a vertical direction.
The flow of liquid fertilizer in the fertilizer application pump device 13 is changed from horizontal from front to back to vertical from top to bottom, and each pump 2
6 are set to have the same height, so that even if the liquid fertilizer in the sub tank 24 decreases, each pump 26
Are not biased, and even if the liquid fertilizer is separated, there is no bias in the quality of the liquid fertilizer sucked by each pump 26. In the pasty liquid fertilizer having a higher viscosity, the liquid is sucked into the pumps 26 in the direction of gravity, so that a smooth suction is achieved.
In the cleaning of No. 3, the suction ports 26a of the pumps 26...
Is opened at the bottom surface 24a of the sub tank 24, and the pump 26
Since the structure of... Is vertically downward, the cleaning agent can easily flow down the residue and the cleaning operation can be simplified.

In the embodiment, a fertilized rice planting machine 1 having six rows of plants is used.
In the relationship described above, the fertilizer application pump device 13 in which six pumps 26 are arranged in an annular shape is illustrated, but the present invention is not limited to the number or arrangement of the pumps 26. Further, the present invention is not limited to the fertilizer rice transplanter 1, but is applicable to all fertilizer pump devices constituting the fertilizer.

[0022]

[Effects of the Invention] As described above, in the present invention, the suction port of each pump is open to the bottom of the sub-tank, the suction port of each pump can be made the same height, and the liquid level of fertilizer in the sub-tank and the pump Since the suction port is parallel, even if the liquid level changes due to the increase or decrease in the amount of liquid fertilizer in the sub tank, the suction ports of some pumps will not be positioned higher than the liquid level,
There is no bias in the inhalation of liquid fertilizer, and there is no difference in the amount of fertilizer discharged from the nozzle of each planting streak of the crop. For this reason, the liquid fertilizer can be used up to the end, thereby improving the working efficiency. In addition, even if the liquid fertilizer is separated in the sub-tank and sediment is formed, the liquid fertilizer is uniformly sucked into each pump, and a change in the quality of the liquid fertilizer discharged from the nozzle of each planting streak of the crop can be reduced. Therefore, there is little unevenness in the growth of the crop of each planting streak, so that the crop can be stably increased in yield and the growth management can be facilitated.

[Brief description of the drawings]

FIG. 1 is an overall side view of a fertilizer rice transplanter.

FIG. 2 is an overall side view of the fertilizer application device.

FIG. 3 is a side view of the fertilizer application pump device.

FIG. 4 is a side sectional view of the fertilizer application pump device.

FIG. 5 is a bottom view of the fertilization pump device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fertilizer application planter 6 Fertilizer tank 10 Suction hose 13 Fertilizer application pump device 16 Hose (fertilizer application hose) 18 Seed stand 19 Planting rod 20 Float 21 Nozzle (fertilizer application nozzle) 24 Subtank 24a Bottom of subtank 26 Pump 26a Pump inlet 26b Pump Outlet 27 pump drive

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of fertilizer application pumps separately installed are simultaneously driven to a plurality of suction ports opened to a sub-tank communicating with a fertilizer tank, and a fertilizer is applied to a nozzle corresponding to each individual planting streak of a crop. A fertilizer pump mounting structure for a mobile agricultural machine, wherein a fertilizer pump is mounted downward, with a suction port of each fertilizer pump being opened at the bottom of the sub-tank.