JPH0415021Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to the structure of the nozzle part of a soil disinfection machine that drives a nozzle into the ground and sprays a chemical solution, etc. at a certain depth. By ejecting and stopping when the nozzle reaches a predetermined depth, it is possible to ensure ejection at a constant depth and enhance the effectiveness of soil disinfection.

[Conventional technology]

In the case of a conventional soil disinfection machine, for example, as shown in FIG. 6, which schematically shows only the nozzle portion, a liquid passage c in a nozzle pipe b having a sharp tip a.
A check valve e is provided which is closed by a valve spring d, and by the operation of a pump f such as a piston pump or a diaphragm pump communicating with the liquid passage c, the chemical liquid is discharged from the nozzle in accordance with the injection of the nozzle. was spewing out.

[The problem that the idea aims to solve]

These conventional methods require a special pump that synchronizes the pump and nozzle and activates instantaneously when the nozzle descends, and also sprays when the nozzle descends relative to the body of the soil disinfection machine. There is also a risk that the injection depth may change depending on the actual ground condition (for example, hard, soft, slope, etc.), or that the liquid may be ejected onto the ground.

[Means to solve the problem]

Here, this invention provides a soil disinfection machine in which a tip section with a valve device is disposed near the lower end of a nozzle rod that is connected to a pressure feeding means and can be inserted into and removed from the soil. are respectively formed with first and second through holes in the radial direction and are slidable into contact with the nozzle rod, and the first through hole is openable and closable and has a hose connected to the pressure feeding means. a first valve device comprising a connected guide member; a second valve device including a distal end portion that can freely open and close the second passage hole and in which a radial passage hole is formed; a guide plate stay that is integral with the nozzle rod and includes a guide plate for protruding the nozzle rod downward by an amount equivalent to a predetermined depth, when the nozzle rod is inserted into the ground; The second valve device is opened by moving upward, and the first valve device is opened by moving upward via the guide plate stay, and the chemical solution is sent through the pressure feeding means. proposes an injection nozzle for a soil disinfection machine, characterized in that the soil is injected while the first valve device is open.

[Effect]

Figure 1 shows one type of soil disinfection machine, in which a truck 1 has a prime mover 2, a water tank 3, a chemical solution tank 4,
It is equipped with an injection nozzle 5, etc., and this invention relates to a new structure of the injection nozzle 5.

That is, in FIG. 2 and FIG. 3, which is a partially enlarged cross-sectional view, the upper part of the nozzle rod 6, which can be inserted and removed via a drive means (not shown), that is, movable in the vertical direction as shown in the figure, is connected to a pump as a pressure feeding means (see FIG. A hose 7 (not shown) is slidably inserted through a guide member 8 to which the hose 7 is connected, and a through hole 9 formed in the guide member 8 to open to the hose 7 is connected to the nozzle rod 6. A first valve device 12 is formed between the liquid passage 10 formed therein and a first passage hole 11 formed laterally. That is, the guide member 8 and the nozzle rod 6, which are movable relative to each other between the upper stopper 13 and the lower stopper 14, are normally moved toward the lower stopper by the action of the spring 15 compressed between the upper stopper 13 and the guide member 8. 14, in which case the through hole 9 and the first through hole 11 occupy the position shown in FIG. 2, and the first valve device 12 is closed.

On the other hand, a second valve device 16 is provided at the tip of the nozzle rod 6.
The nozzle member 17, which is slidably fitted to the lower end of the nozzle rod 6, has a spring 18.
is always urged downward, that is, in a direction away from the nozzle rod 6, and its movement is prevented by the stopper 19.
limited by. A through hole 21 is bored in the side surface of the nozzle member 17 having a sharp tip 20, and a second through hole 22 that cooperates with this through hole 21 to constitute the second valve device 16 is connected to the The through hole 21 and the second through hole 22, which are bored in the side surface of the lower end of the nozzle rod 6, are normally closed, but when the nozzle member 17 penetrates into the soil, they resist the force of the spring 18. Communication is achieved by sliding the nozzle member 17.

Note that a guide plate 24 is attached to the lower end of a guide plate stay 23 extending downward from the guide member 8, and the guide plate stay 23 is actually constructed in a telescoping type, for example, so that it can be expanded and contracted. shall be.

In the above configuration, when the nozzle member 17 pierces the soil as shown in FIG. 4, the second valve device 16 is opened, but the hose 7 is
The chemical liquid that has reached the first valve device 12 via the first valve device 12 cannot enter the liquid passage 10 because the first valve device 12 is closed. In other words, no chemical liquid is ejected.

Next, when the nozzle rod 6 further enters the soil and the guide plate 24 hits the ground surface as shown in FIG. 5, the guide member 8 is pushed up and the first valve device 12 is opened. Then, the chemical solution is injected into the soil from the liquid passage 10 through the second valve device 16.

As soon as the nozzle rod 6 begins to be pulled up, both the first valve device 12 and the second valve device 16 are closed.

At this time, although the chemical liquid remains in the liquid passage 10 within the nozzle rod 6, there is no dripping because the second valve device 16 located below is also closed.

By appropriately expanding and contracting the guide plate stay 23, disinfection work can be performed while adjusting the spray depth.

[Effect of idea]

According to this invention, while the first valve device is open, the chemical solution is injected into the ground by the pressure feeding means, and when the nozzle rod emerges from the ground, the second valve device is closed. It has the effect of not emitting toxic gases or odors caused by chemical solutions.

[Brief explanation of the drawing]

Figure 1 is a side view showing an example of a soil disinfection machine, Figure 2
The figure is a cross-sectional view of the main parts of the injection nozzle of this invention.
The figure is an enlarged cross-sectional view of a portion of the part shown in Figure 2, Figures 4 and 5 are cross-sectional views showing each step of the work of piercing the injection nozzle into the soil, and Figure 6 is an explanation showing the conventional method. It is a diagram. In the figure, 6... nozzle rod, 7... hose, 8... guide member, 10... liquid passage, 11...
First through hole, 12... First valve device, 16... Second valve device, 17... Nozzle member, 20... Tip, 22... Second through hole, 23... Guide plate Stay, 24... is a guide plate.

Claims (1)

[Scope of utility model registration request] In a soil disinfection machine, a nozzle rod is connected to a pressure feeding means and has a tip portion equipped with a valve device near the lower end of the nozzle rod, which can be inserted into and removed from the soil. A hose having first and second through holes 11 and 12 formed therein, capable of slidingly contacting the nozzle rod 6, capable of freely opening and closing the first through hole 11, and communicating with the pressure feeding means. a first valve device 12 consisting of a guide member 8 connected to a second valve device 12; It consists of a device 16 and a guide plate stay 23 that is integrated with the guide member 8, is provided along the nozzle rod 6, and has a guide plate 24 for projecting the nozzle rod 6 downward by an amount equivalent to a predetermined depth. , the nozzle rod 6
When the is inserted into the ground, the second valve device 16 is opened by moving upward, and the first valve device 12 is opened by moving upward via the guide plate stay 23. An injection nozzle for a soil disinfection machine, wherein the chemical liquid sent through the pressure feeding means is injected into the soil while the first valve device 12 is open.