JP2501212Y2 - Soil injection machine - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention relates to a soil injection machine for injecting liquids such as chemicals and fertilizers into soil such as paddy fields.

2. Description of the Related Art As a soil injecting machine for injecting a liquid such as a chemical solution or a fertilizer into a soil such as a paddy field, a machine shown in FIG. 2 is known. This machine supports a machine body 1 with wheels 2. Then, the wheels 2 are driven by the internal combustion engine 3 provided in the machine body 1 and the steering handle 4 extending rearward of the machine body 1 is operated to move the machine, and the supporting member extending further downward from the machine body 1 is operated. A rotor shaft 6 is fixed to the lower end of the rotor shaft 5, a rotor 7 of the rotor shaft 6 is rotatably supported, and a plurality of liquid injection pipes 8 radially extending from the rotor 7 are provided. While supplying liquid from an external liquid source,
While the machine is running, the tip of the liquid injection pipe 8 is inserted into the soil to inject the liquid into the soil.

In such a conventional soil pouring machine, for example, each liquid injection pipe 8 is provided with a poppet valve 9 at the base end fixed to the rotor 7 as shown in FIG. A cam projection 11 capable of engaging with the movable valve body 10 of the poppet valve 9 is provided in a vertically lower portion of the surface, and the liquid injection pipe 8 is inserted vertically into the soil by rotating vertically while the rotor 7 is rotating.
Only the poppet valve 9 of is opened by the action of the cam protrusion 11,
A ring-shaped liquid chamber 12 formed around the rotor shaft 6 is provided with a liquid pumped from an external liquid source through the poppet valve 9 into the liquid injection pipe 8 and provided at the tip of the liquid injection pipe 8. The check valve 13 is opened to inject the liquid into the soil.

As described above, in the conventional soil pouring machine, each liquid injection pipe 8 is provided with the poppet valve 9, the rotor shaft 6 is provided with the annular liquid chamber 12, and the cam projection 11 acting on the poppet valve 9 is provided. Therefore, it is costly and time-consuming to manufacture the liquid injection machine, and dust and the like adhere to the inside of the poppet valve 9 to make the poppet valve 9 incompletely closed, which may cause liquid leakage. There was some inconvenience.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a soil pouring machine having a simple and convenient form while eliminating the disadvantages of the conventional techniques.

Means for Solving the Problems That is, according to the present invention, a rotor shaft, a rotor rotatably supported by the rotor shaft, a liquid passage having an outlet opening formed in the rotor shaft and opening downward in the radial direction, A soil pouring machine includes a plurality of liquid injection pipes mounted at a proximal end of the rotor so as to extend in a radial direction and sequentially aligning with an outlet opening of a liquid passage of a rotor shaft during rotation of the rotor. A pair of seal rings are respectively arranged on the outer peripheral surface of the rotor shaft on both axial sides of the outlet opening of the liquid passage, and the pair of seal rings are formed on the inner peripheral surface between the outer peripheral surface of the rotor shaft and the inner peripheral surface of the rotor. A collar member with which the seal ring relatively rotatably contacts is fixedly arranged on the rotor side, and packing is provided at each base end portion of the liquid injection pipe to crimp the collar member so that the liquid passage of the collar member Out Each of the holes is formed in a portion aligned with the mouth opening.

Preferably, the collar member is a sleeve made of polytetrafluoroethylene.

Therefore, the liquid delivered from the outlet opening of the liquid passage of the rotor shaft to the liquid injection pipe through the hole of the collar member leaks out from the gap between the rotor shaft and the rotor to the outside by the seal ring and the packing. Is completely blocked by.

Embodiment Next, the present invention will be described based on an embodiment of the drawings.

As shown in FIG. 1, a soil injection machine according to an embodiment of the present invention has a rotor shaft 20 fixed to a machine body, a rotor 21 rotatably supported by the rotor shaft 20, and a base end portion of the rotor 21. A plurality of radially extending liquid injection pipes 23 fixed as described later at 22 and an auxiliary rod 24 fixed to the rotor 21 so as to extend radially between the adjacent liquid injection pipes 23.
And The rotor shaft 20 forms a liquid passage 25 extending from one end at its axial center, and an inner end thereof is bent downward vertically and an outlet opening 26 opened downward in the radial direction at a lower portion of the outer peripheral surface of the rotor shaft 20. To form and have. A pressurized liquid such as liquid fertilizer from an external liquid source is supplied to the liquid passage 25 through a pipe (not shown) during use of the liquid injector.
The rotor 21 extends radially outward in a vertical plane passing through the axis of the outlet opening 26 of the rotor shaft 20 and has a plurality of protrusions that can be sequentially aligned with the outlet opening 26 during rotation of the rotor 21. 27 are integrally formed at equal intervals, and each protrusion
27 has a threaded radial through hole 28 formed in its inner peripheral surface.

An annular recess 29 is formed on the inner peripheral surface of the rotor 21 through which the rotor shaft 20 is inserted.
A sleeve-shaped collar member 30 is disposed inside and the open end of the annular recess 29 is sealed with a suitable plain bearing 31. The collar member 30 is made of a suitable synthetic resin material, preferably polytetrafluoroethylene (trade name "Teflon") which is flexible and has a low coefficient of friction. Holes 32 are formed in the collar member 30 at the portions aligned with the radial through holes 28 of the rotor 21, and are positioned by using screws 35 or the like. On the other hand, on the outer peripheral surface of the rotor shaft 20, a pair of O-rings 33 and 34 are arranged in the groove on both axial sides of the outlet opening 26 of the liquid passage 25, respectively.
These O-rings 33 and 34 rotatably contact the inner peripheral surface of the collar member 30 as will be described later, and contact the rotor shaft 20 and the collar member 30 on both sides of the outlet opening 26. Seal the gap to prevent liquid leakage.

Each of the liquid injection pipes 23 is fixed at the base end 22 thereof by being screwed into the through hole 28 of each of the protrusions 27 of the rotor 21.
An annular step portion 35 is formed at the tip of the base end portion 22 of each liquid injection pipe 23, and an annular packing 36 such as an Viton (trade name) is attached to the step portion 35. The tip of the packing member 36 projects slightly inward from the through hole 28 so that the collar member
Lightly crimp the outer peripheral surface of 30 to seal between the rotor 21 and the collar member 30 to prevent liquid leakage and at the same time
It acts to press 30 against O-rings 33 and 34.

Due to the above-mentioned configuration, the rotor 21 can be used as a collar member during use.
When rotating around the rotor shaft 20 together with the liquid injection pipe 23, which has been inserted into the soil and moved substantially vertically downward, the liquid injection pipe 23 passes through the hole 32 of the collar member 30 at the base end portion 22 thereof.
Of the liquid passage 25, so that the liquid in the liquid passage 25 extends from the outlet opening 26 to the hole 32 of the collar member 30.
And is delivered by pressure into the liquid injection pipe 25, and the delivered liquid is opened by opening a check valve (not shown) provided at the tip of the liquid injection pipe 25. It is injected into the soil from the tip of 25. After that, the rotor 21 further rotates and the liquid injection pipe 25 becomes the outlet opening of the liquid passage 25 of the rotor shaft 20.
Deviated from its alignment with 26, the delivery of liquid from the outlet opening 26 of the liquid passage 25 to the liquid injection pipe 25 is blocked, so that the check valve at the tip of the liquid injection pipe 25 acts on its spring. The liquid injection pipe 25 is blocked from being discharged to the outside.

Effect of the Invention With the configuration of the present invention described above, the present invention can completely prevent leakage of liquid from the gap between the rotor shaft and the rotor by the seal ring and the packing, and therefore, in the prior art. It is not necessary to provide a poppet valve for each liquid injection pipe or a cam mechanism for operating the liquid injection pipe as described above, and therefore a soil pouring machine that has a simple structure, is easy to manufacture, and can be manufactured at low cost, etc. Produce an effect.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a soil injection machine according to the present invention,
FIG. 2 is a schematic side view of a conventional soil pouring machine, and FIG. 3 is a sectional view of a portion of a rotor shaft, a rotor and a liquid injection pipe of the soil pouring machine of FIG. 20 ... Rotor shaft, 21 ... Rotor, 22 ... Liquid injection pipe base end, 23 ... Liquid injection pipe, 25 ... Liquid passage, 26 ... Liquid passage outlet opening, 30 ... Color member, 32 …… Collar member holes, 33, 34 …… Seal ring, 36 …… Packing.

Claims (2)

(57) [Scope of utility model registration request] 1. A liquid passage having a rotor shaft (20), a rotor (21) rotatably supported by the rotor shaft, and an outlet opening (26) formed in the rotor shaft and opening downward in the radial direction (26). 25) and a plurality of liquid injection pipes which are attached to the rotor so as to extend in the radial direction and which can be sequentially aligned with the outlet openings of the liquid passages of the rotor shaft during rotation of the rotor. (23) In a soil pouring machine including, a pair of seal rings (33, 34) are respectively provided on the outer peripheral surfaces of the rotor shaft on both sides in the axial direction of the outlet opening of the liquid passage of the rotor shaft. A fixed collar member (30) is disposed on the rotor side between the outer peripheral surface of the rotor shaft and the inner peripheral surface of the rotor, the inner peripheral surface of which is in contact with the pair of seal rings in a relatively rotatable manner. Each of the liquid injection tubes A packing (36) is provided at a base end portion, the packing is crimped to the collar member, and a hole (32) is formed in a portion of the collar member that is aligned with the outlet opening of the liquid passage. Soil pouring machine. 2. The soil pouring machine according to claim 1, wherein the collar member is a sleeve made of polytetrafluoroethylene.