JP2002253106A - Soil-disinfecting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medicinal liquid-injecting pump of a soil-disinfecting machine, having a simple structure and less trouble. SOLUTION: The medicinal liquid-injecting pump of the solid-disinfecting machine is characterized by constituting a tube having an elastic property (a restoring property), a tube-supporting member for supporting the tube in an almost circular state and a rotary member having plural rollers in its circumference, and by rotating the rotary member, compressing and deforming the tube between the rollers and the tube-supporting member for sending the medicinal liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil disinfecting machine for disinfecting soil in a facility such as a field or a house where vegetables and flowers are cultivated and avoiding soil diseases. Get involved.

[0002]

2. Description of the Related Art Conventionally, a soil disinfecting machine of the type shown in FIG. 5 is widely used. The chemical liquid injection pump 1 used in FIG. 5 is a diaphragm pump having the structure shown in FIG. 6, and includes a suction valve 2 provided on the suction and discharge sides, a discharge valve 3, and a pump chamber 4 therebetween. I have. One side of the pump chamber 4 is partitioned by a flexible diaphragm 5, and by reciprocating an operating rod 6 connected to the center of the diaphragm 5, a chemical solution is sucked from a suction port 7 and discharged. It is discharged to the outlet 8.

[0003] In this chemical liquid injection pump 1, a chemical liquid path is formed through which a chemical liquid passes, and all parts (for example, a ball, a spring, a diaphragm, and an operating rod connected to the center of the diaphragm) are crawled. The material must be able to withstand highly corrosive chemicals such as picrine. Stainless steel is generally used as a material for components such as a ball and a spring constituting the suction valve 2 and the discharge valve 3, but corrosion cannot be completely prevented by stainless steel. Therefore, these parts must be replaced after a certain period of use. Chlorpicrin, which is used as a drug solution, is an extremely toxic powerful drug for the human body.
When exchanging parts, care must be taken not to touch the chemical, and the chemical must be thoroughly washed out with sufficient water flow.

[0004]

Since such complicated replacement of parts is troublesome and dangerous, research on a corrosion-resistant material which is not affected by a chemical such as chlorpicrin has been conducted. However, at present, a material having sufficient performance has not yet been developed.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a soil disinfecting machine having a pump for injecting a chemical solution into a soil by sucking a chemical solution from a chemical solution tank and having a resilient tube as a pump. A rotating member having a plurality of rollers around the tube supporting member for supporting the tube in a substantially arc shape, and rotating the rotating member to press and deform the tube between the rollers and the supporting member. It is characterized in that a chemical solution is sent from the suction side to the discharge side.

[0006] The invention is characterized in that the rotating member of the pump rotates in conjunction with a ground contact wheel rolling on the ground surface as the soil disinfecting machine runs.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a soil disinfecting machine according to the present invention, which is used by being connected to a tractor or a tiller (not shown) by a mounting hitch 10 provided at a front portion. An L-shaped frame 11 is connected to the mounting hitch 10, and a chemical solution tank 12 is mounted on a frame extending rearward of the L-shaped frame. At the rear end of the frame 11, there is a grounding wheel 13 mounted on a shaft. The grounding wheel 13 rolls on the ground as the soil disinfecting machine advances.

At the lower end of the frame 11, there is a chemical injection blade 14, which is fitted at a certain depth from the soil surface. A discharge pipe 16 having one end connected to the discharge side of the chemical liquid injection pump 15 and the other end facing below the ground is stored on the back surface. The pump 15 is screwed and fixed to a pump mounting frame 17 provided above the frame 11, and the suction side of the pump 15 is connected to the tank 12 via a suction pipe 18. A sprocket 19 is mounted on one shaft end of the ground contact wheel 13, and a chain 22 is wound between the sprocket 19 and a sprocket 21 provided on the shaft end of a pump drive shaft 20.
5 is driven.

As shown in FIG. 2, the chemical solution injection pump 15 includes a tube 23, a tube support member 24, and a rotating member 25. Tube holding member 24
Is composed of left and right pump housings 24a and 24b and a pressing plate 24c for supporting the tube 23 from above, and is screwed to the pump mounting plate 17 which is a part of the frame of the soil disinfecting machine with four bolts.

As shown in FIGS. 4A, 4B, and 4C, the tube 23 does not rotate with the rotating member 25 on both sides of the lower end of the holding plate 24c even when the rotating member 25 rotates. A tube hook claw 24c 'for holding the tube 23 from above is provided on the suction side and the discharge side, respectively.

FIG. 3 is a cross-sectional view of the chemical liquid injection pump 15. The rotary member 25 includes two support disks 25a and 25b fixed to the pump drive shaft 20, and two support disks 25a and 25b.
It consists of six rotatable rollers 26 suspended between a and 25b. Each of the six rotatable rollers 26 is positioned so that a part thereof faces outward from the outer periphery of the support disks 25a and 25b, and the rotation thereof presses and deforms the tube 23. The reason why the roller 26 provided on the rotating member 25 is rotatable is to reduce the resistance when the rotating member 25 rotates and to prevent the surface of the tube 23 from being damaged.

Since the chemical solution pump 15 is configured as described above, when the soil disinfecting machine is advanced, the grounding wheel 1 is moved.
3 rolls on the ground and drives the pump drive shaft 20 via a chain 22. The rotation of the pump drive shaft 20 causes the rotation member 25 to rotate, and the support disk 25a of the rotation member 25,
Six rollers 26, which are mounted between 25b, also rotate, three of which press and deform tube 23. The tube 23 has a high elasticity (restoring property) such as rubber, and is restored immediately after being released from the pressing of the roller 26.

Next, the operation of the chemical liquid injection pump 15 will be described with reference to FIGS. 4 (A), 4 (B) and 4 (C). (1) In FIG.
The tube is pressed and closed by the
Divided into Since the rollers A and C have not yet completely closed the tube 23, the room a on the right
6, the left room b communicates with the suction pipe 18. When the rotating member 25 rotates and the closing point of the roller B moves to the right, the room a on the right becomes narrower and the room b on the left becomes wider as much as it moves. However, since the amount of the chemical contained in each room does not change, the pressure in the room a increases and the pressure in the room b decreases. Therefore, the liquid medicine is sucked from the liquid medicine tank 12 through the suction pipe 18 into the room b, and a part of the liquid medicine in the room a is sent to the discharge pipe 16 side. (2) When the rotating member 25 is further rotated to the state shown in FIG. 4B, a room c having both ends completely closed in the tube 23 by the rollers B and C is formed. (3) When the rotating member 25 continues to rotate and reaches the state shown in FIG. 4C, the release of the closing point on the discharge side of the room c starts. However, since the closing point on the suction side of the room c remains completely closed, the chemical does not flow backward from the room a to the room c. On the other hand, the next new room d is starting to be formed by the rollers C and D.

Each time the rotating member 25 rotates 60 °, the chemical liquid injection pump 15 repeats one cycle of operation, and each time the chemical liquid contained in the room closed by the two rollers is discharged to the discharge side. Will be sent to In FIG. 4, the tube 23, the discharge pipe 16, and the suction pipe 18 are drawn as a single pipe, but the discharge pipe and the suction pipe may be separate bodies. Connect using

[0015]

As described above, the pump for injecting a chemical solution of a soil disinfection machine according to the present invention does not have any devices such as a suction valve and a discharge valve in a passage through which the chemical solution passes. Since it is not corroded, it is free from the trouble of replacing parts. Further, the pump for injecting a drug solution has a simple structure, and the roller for pressing and deforming the tube is rotatably supported, so that the tube can be prolonged without damaging the tube.

[Brief description of the drawings]

FIG. 1 is a side view of a soil sterilizer of the present invention.

FIG. 2 is a perspective view of a chemical solution injection pump used in FIG.

FIG. 3 is a cross-sectional view of the chemical solution injection pump.

FIG. 4 is a side view illustrating the operation of the pump.

FIG. 5 is a side view of a conventional soil disinfection machine.

FIG. 6 is a cross-sectional view of a conventional chemical solution injection pump.

[Explanation of symbols]

 Reference Signs List 12 chemical liquid tank 13 grounding ring 15 chemical liquid injection pump 16 discharge pipe 18 suction pipe 20 pump drive shaft 23 tube 24 tube support member 24a, 24b pump housing 24c holding plate 24c 'tube hooking claw portion 25 rotating member 25a, 25b support circle Board 26, AD roller ad room

Claims (2)

[Claims] 1. A soil disinfection machine equipped with a chemical solution injection pump for sucking a chemical solution from a chemical solution tank and discharging the solution into the soil,
The pump is composed of a tube having elasticity, a tube supporting member for supporting the tube in a substantially arc shape, and a rotating member having a plurality of rollers around the tube, and the rotating member rotates to press and deform the tube. Soil disinfection machine characterized by sending chemicals. 2. The soil sterilizer according to claim 1, wherein the rotating member rotates in conjunction with a ground wheel that rotates as the soil sterilizer travels.