JPH055841Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a device for deeply cultivating soil by injecting pressurized air through an air injection pipe inserted from the ground in cultivated land.

Conventional technology Conventionally, this type of deep cultivator releases pressurized air that has been injected into a pressure storage chamber all at once, and pumps it into the ground from the tip of the air injection tube inserted vertically about 30 to 50 cm from the surface of the cultivated land. The idea is to emit oxygen, thereby destroying the structure of the soil and blowing it up, as well as supplying oxygen to the roots of plants.
Furthermore, at the same time as such air injection, pesticides, fertilizers, etc. are also distributed and supplied underground.

As a discharge valve for such an air-injection type deep cultivator, for example, the one shown in Figs. Large diameter shutoff valves using spherical valve bodies were often used.

In order to improve work efficiency, such a discharge valve in the prior art needs to be closed immediately after pressurized air is released, and the valve spring 2
The valve body 1 is always urged toward the valve seat 3 by the valve body 1. However, as air is forced into the pressure accumulation chamber 5, the valve body 1 is pressed against the valve seat 3 by air pressure, so in order to separate the valve body 1 from the valve seat 3, air pressure and the valve spring 2 must be The valve stem 4 had to be operated against the forces of both, and it was difficult to quickly obtain a high opening.

For this reason, there is a limit to the discharge speed of the pressurized air, and there have been complaints that the efficiency of blowing up the soil cannot be improved.

Problems to be Solved The present invention aims to provide a deep cultivator with a pressurized air discharge valve that can be easily and quickly operated and has high blowing efficiency.

Means for solving the problem The improved deep blow-up cultivator of this invention discharges the pressurized air in the air storage chamber through an air injection pipe inserted into the ground by opening a discharge valve, and comprises a valve seat provided on the bottom of the air storage chamber and communicating with the air injection pipe, a top cover provided on the top of the air storage chamber and having a cylinder portion, a valve rod inserted into the cylinder portion and having a piston portion, a valve body connected to the lower part of the valve rod, and a valve spring provided between the valve rod and the top cover and urging the valve body toward the valve seat, and is configured so that the diameter of the piston portion is equal to or slightly smaller than the diameter of the valve seat.

The present invention will be further explained below with reference to Examples.

Example Figure 1 shows the structure of the blow-up deep cultivator of the present invention.
Further, FIG. 2 shows the details of the structure of the discharge valve section.

In the figure, 1 is an air storage chamber, 2 is an air injection pipe, and 3
is a support cylinder, and 4 is a handle. The head 2a of the air injection tube 2 is inserted into the support cylinder 3 so as to be able to slide up and down, and the lower end has an air blowing hole 2b and a cone 2.
c is provided. In addition, 5 is a blow-up prevention plate.

A valve seat 10 is attached to the hole 1a at the center of the bottom surface of the air storage chamber 1, and an upper lid 7 having a cylinder portion 71 is attached to the hole 1b at the center of the upper surface. A valve stem 8 constituting a piston part 82 having a thin upper part 81 and a thick lower part is inserted into the cylinder part 71 so as to be movable up and down. It is thinner so that it can be used. 9
The upper part 81 of such a valve stem 8 and the piston part 8
The valve spring is provided between the step portion 83 formed between the cylinder portion 2 and the upper end portion 72 of the cylinder portion.

A recessed hole 84 is provided in the lower part of the valve stem 8.
A spherical joint can be formed with the plug 85.

Reference numeral 6 denotes a valve body, which has a spherical part 61 at its lower end facing the valve seat 10 and a spherical part 62 at its upper end which can be fitted into a recessed hole 84 to form a spherical joint.

In addition, between the hole 1a on the bottom surface of the air storage chamber 1 and the valve seat 10, between the hole 1b on the top surface of the air storage chamber 1 and the outer surface of the cylinder part 71, and between the inner surface of the cylinder part 71 and the lower part of the valve stem 82. are respectively provided with O-rings 0, 0, etc. to maintain airtightness, and a pressure equalizing hole 86 is provided in the valve stem upper part 81, and the cylinder in which the valve spring 9 is provided. part 71 and valve stem upper part 8
1 and the pressure is equalized with the outside pressure.

A pin 87 is provided at the upper end of the valve stem 8, and the valve stem 8 is operated by an operating lever 11 provided so as to be able to rotate up and down about a fulcrum 73 attached to the upper lid 7. is configured so that it can be moved up and down.

Further, the diameter of the piston portion 82 is equal to or slightly smaller than the diameter of the valve seat 10, that is, the diameter of the contact circle between the valve seat 10 and the valve body 6.

In the deep cultivator of the present invention having such a configuration, when pressurized air is supplied into the air storage chamber 1 from the air supply hole 1c through the air supply valve (not shown), the valve body 6 is pushed by the valve spring 9. When the valve seat 10 is closed, the spherical joint formed by the spherical part 62 on the upper part of the valve body and the concave hole 84 in the valve stem automatically creates a core gap between the valve seat 10 and the valve body 6. Since displacement is compensated for and a complete seal is achieved, pressurized air can accumulate without leaking. In addition, the downward air pressure applied to the valve body 6 is compensated by the upward air pressure applied to the valve stem 8 and does not become excessively large. Since the internal pressure acts to push up the valve stem 8, the discharge valve quickly reaches a fully open state.

Effects of the invention The blow-up deep cultivator of the present invention has the advantage that the discharge valve is easy to operate and can be opened and closed quickly, so it is not only easy to operate, but also has a high soil blow-up efficiency, making the work more efficient. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of the blow-up deep cultivator of the present invention, and FIG. 2 is an enlarged view of the pressure accumulating chamber thereof. FIGS. 3 and 4 are conceptual diagrams showing examples of conventional deep cultivators.

Claims (1)

[Scope of utility model registration request] A deep cultivator that sends out pressurized air in an air storage chamber through an air injection pipe inserted into the ground by opening a discharge valve, which comprises a valve seat provided on the bottom of the air storage chamber and communicating with the air injection pipe; , an upper lid provided on the upper surface of the air storage chamber and having a cylinder part, a valve rod inserted into the cylinder part and having a piston part, a valve body connected to a lower part of the valve rod, and the valve rod and the upper lid. and a valve spring provided between the valve body and the valve spring biasing the valve body toward the valve seat, and configured such that the diameter of the piston portion is equal to or slightly smaller than the diameter of the valve seat. Tenaru blow-up deep cultivator.