JP2008283905A - Soil disinfection apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil disinfection apparatus that sends a disinfectant solution stored in a tank toward a nozzle and returns the sent disinfectant solution to the tank. <P>SOLUTION: The soil disinfection apparatus has a constitution that a tractor 1 is equipped with a main tank 3 for storing the disinfectant solution 50 to disinfect soil and a subtank, the disinfectant solution 50 in the main tank 3 is sent to a switching valve 24 by a pump 6, the switching valve 24 is connected to a feed pipe 25 connected to an injector blade (nozzle) 15 and a return pipe 10, connected to the subtank and the delivery end of the disinfectant solution 50, is changed into a feed pipe 25 or the return pipe 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a soil disinfecting machine capable of returning a disinfecting solution sent from a tank toward a nozzle to the tank.

  A conventional soil disinfecting machine is equipped with a traveling machine body, for example, a tank that stores disinfecting liquid in a tractor, a pump that sends out the disinfecting liquid, and a plurality of nozzles that inject the disinfecting liquid into the soil. A mixing rotary is attached to the rear of the pump, and a disinfecting solution is sent to a plurality of nozzles by the pump, the nozzle is pierced into the soil, the disinfecting solution is injected into the soil, and the soil into which the disinfecting solution is injected is added to the mixing rotary. To disinfect the soil (see Patent Document 1).

A soil disinfecting machine in which valves are provided for a plurality of nozzles has been proposed. If disinfection work is performed at the end of the field at the end of the disinfection work and the width of the disinfection work is larger than the width of the soil to be disinfected, there is a risk that the already disinfected soil will be disinfected again. is there. Therefore, disinfecting work is performed by closing the valves of some nozzles that do not require injection of the disinfectant solution, thereby preventing the occurrence of chemical damage due to excessive injection of the disinfectant solution.
JP 2001-161247 A

  When the valves of some of the nozzles are closed, the amount of disinfectant delivered by the pump is constant and the flow rate of the disinfectant injected from the remaining nozzles increases. It was necessary to adjust the flow rate of the disinfectant sprayed from the remaining nozzles by changing the number.

  The present invention has been made in view of such circumstances, and a plurality of switching valves for switching the destination of disinfecting liquid are connected to a plurality of supply pipes for supplying disinfecting liquid sent from a pump to a plurality of nozzles, respectively. The switching valve is connected to a return pipe for returning the disinfecting liquid to the tank, so that the disinfecting liquid supplied to the nozzle that does not need to be injected with the disinfecting liquid is caused to flow through the return pipe by the switching valve. An object of the present invention is to provide a soil disinfecting machine capable of suppressing an increase in the flow rate of the disinfecting liquid sprayed from the nozzle for injecting the disinfecting liquid.

  In addition, by providing a plurality of adjusting members for adjusting the flow rate of the disinfectant liquid in the supply pipe and the return pipe, the destination of the disinfectant liquid flowing through the one supply pipe can be supplied to the return pipe using the switching valve. When switching, the flow rate of the disinfecting liquid flowing through the return pipe is substantially the same as the flow rate of the disinfecting liquid flowing through the one supply pipe, and when the disinfecting liquid delivery destination is switched, An object of the present invention is to provide a soil disinfecting machine that can suppress a change in the flow rate of the disinfecting liquid flowing through the supply pipe.

  Further, by using an orifice for the adjustment member, the flow rate of the disinfecting liquid flowing through the supply pipe and the flow rate of the disinfecting liquid flowing through the return pipe are adjusted, and the flow rate change of the disinfecting liquid ejected from the nozzle An object of the present invention is to provide a soil disinfecting machine capable of suppressing the above.

  The soil disinfecting machine according to the present invention is provided with a traveling machine body, a tank for storing a disinfecting liquid for disinfecting soil, a pump for sending the disinfecting liquid from the tank, and a pump sent from the pump. In a soil disinfecting machine including a plurality of supply pipes for supplying a disinfectant solution to a plurality of nozzles, each of which is connected to the supply pipe, and a plurality of switching valves for switching destinations of the disinfecting liquid, and the switching valve And a return pipe for returning the disinfectant liquid to the tank.

  In the present invention, a plurality of switching valves for switching the destination of the disinfecting liquid are connected to a plurality of supply pipes for supplying the disinfecting liquid sent from the pump to the plurality of nozzles, and the disinfecting liquid is supplied to the switching valve. By connecting the return pipe to the tank, the disinfecting liquid supplied to the nozzle that does not need to be injected with the disinfecting liquid is caused to flow through the return pipe by the switching valve and returned to the tank.

  The soil disinfecting machine according to the present invention is characterized in that a plurality of adjusting members for adjusting the flow rate of the disinfecting liquid are provided in the supply pipe and the return pipe.

  In the present invention, by providing a plurality of adjusting members for adjusting the flow rate of the disinfecting liquid in the supply pipe and the return pipe, the destination of the disinfecting liquid flowing through the one supply pipe can be changed using the switching valve. When switching to the return pipe, the flow rate of the disinfecting liquid flowing through the return pipe is set to be substantially the same as the flow rate of the disinfecting liquid flowing through the one supply pipe.

  The soil disinfecting machine according to the present invention is characterized in that the adjusting member includes an orifice.

  In the present invention, the orifice is used as the adjusting member, thereby adjusting the flow rate of the disinfecting liquid ejected from the nozzle and the flow rate of the disinfecting liquid flowing through the return pipe and returning to the tank.

  In the present invention, a plurality of switching valves for switching destinations of the disinfecting liquid are connected to a plurality of supply pipes for supplying the disinfecting liquid sent from the pump to the plurality of nozzles, and the disinfecting liquid is connected to the switching valve. By connecting a return pipe that returns the liquid to the tank, the disinfecting liquid supplied to the nozzle that does not need to be filled with the disinfecting liquid is caused to flow through the return pipe by the switching valve and returned to the tank. An increase in the flow rate of the disinfecting liquid ejected from the nozzle that injects the liquid can be suppressed.

  Further, in the present invention, by providing a plurality of adjusting members for adjusting the flow rate of the disinfecting liquid in the supply pipe and the return pipe, the disinfecting liquid flowing through the one supply pipe can be obtained using the switching valve. When the delivery destination is switched to the return pipe, the flow rate of the disinfecting liquid flowing through the return pipe is set to be substantially the same as the flow quantity of the disinfecting liquid flowing through the one supply pipe, and the disinfecting liquid delivery destination When switching between, the change in the flow rate of the disinfecting liquid flowing through the other supply pipes can be suppressed.

  In the present invention, the orifice is used as the adjustment member to adjust the flow rate of the disinfectant liquid ejected from the nozzle and the flow rate of the disinfectant liquid flowing through the return pipe and returning to the tank, and ejected from the nozzle. The change in the flow rate of the disinfecting liquid can be suppressed.

  Hereinafter, a soil disinfecting machine according to the present invention will be described in detail with reference to the drawings showing embodiments. FIG. 1 is a schematic side view showing a main configuration of a soil disinfector, FIG. 2 is a schematic enlarged view of the vicinity of a main tank, FIG. 3 is a schematic plan view of a main tank and a sub tank, and FIG. FIG. 5 is a schematic enlarged side view in the vicinity of the flow meter, FIG. 6 is a schematic enlarged front view in the vicinity of the flow meter, and FIG. 7 is a circuit diagram showing the pipeline of the soil disinfector.

  In FIG. 1, reference numeral 1 denotes a tractor, and two mounting tables 2 and 2 are provided in front of the tractor 1. The main tank 3 and the sub tank 4 storing the disinfectant 50 are respectively placed on the mounting tables 2 and 2. The mounting tables 2 and 2 are inclined toward the tractor 1, and the main tank 3 and the sub tank 4 mounted thereon are fixed to the mounting tables 2 and 2 by two tank belts 5 and 5.

  In the vicinity of the main tank 3, a pump 6 that sends out the disinfectant 50 is provided in the tractor 1, and a pump connection pipe 7 that connects the pump 6 and the main tank 3 is provided. The pump 6 is connected to a flow pipe 8 through which a disinfecting liquid 50 flows toward switching valves 24 and 24 described later, and the disinfecting liquid 50 in the main tank 3 is switched by the driving of the pump 6. It is configured to be sent toward the valves 24 and 24. A tank connecting pipe 9 for connecting the main tank 3 and the sub tank 4 is provided, and the main tank 3 is sealed. When the disinfecting liquid 50 stored in the main tank 3 is sent out by driving the pump 6, the pressure in the main tank 3 decreases, and the disinfecting liquid 50 stored in the sub tank 4 It is configured to be sucked into the main tank 3 through the connecting pipe 9. An air vent hole (not shown) is formed in the lid portion of the sub tank 4, and a hose (not shown) is attached to the air vent hole.

  A return pipe 10 connected to the switching valves 24, 24 is connected to the sub tank 4, and the disinfecting liquid 50 delivered from the main tank 3 passes through the switching valves 24, 24 to the sub tank 4. It is made the structure returned to. An air vent valve 11 is adjacent to the pump 6, and a branch pipe 8 a branched toward the air vent valve 11 is provided in the middle of the flow pipe 8. The branch pipe 8a is connected to the air vent valve 11, and the air contained when the disinfectant 50 is sent to the flow pipe 8 is discharged through the branch pipe 8a. A connecting pipe 8b connected to the return pipe 10 is connected to the air vent valve 11, and the disinfecting liquid 50 sent to the branch pipe 8a together with air is passed through the connecting pipe 8b and the return pipe 10 through the connecting pipe 8b. It is configured to return to the sub tank 4.

  The return pipe 10 is provided with a check valve 12 for preventing the backflow of the disinfecting solution 50 and adjusting the flow rate of the disinfecting solution 50, and an orifice member for adjusting the flow rate of the disinfecting solution 50 downstream of the check valve 12. 13 is provided. The orifice member 13 accommodates the orifice plate 13a and is connected to the bottomed cylindrical portion 30 having a through hole 31 corresponding to the hole of the orifice plate 13a at the bottom, and the through hole 31 and protrudes outward. The housing member 13b having the cylindrical joint portion 32 is provided. The orifice member 13 is inserted into the housing member 13b, and a tubular fixing member 13c for fitting and fixing the orifice plate 13a between the housing member 13b and a joint member 13d connected to the fixing member 13c. With. The return pipe 10 is connected to the joint portion 32 and the joint member 13d.

  A support base 14 is attached to the rear part of the tractor 1, and two injection swords 15, 15 for injecting the disinfecting liquid 50 delivered from the main tank 3 into the ground by the pump 6 into the support base 14. Is provided. In addition, the support 14 has a mixing rotary 16 for plowing and mixing the soil injected with the disinfecting solution 50 by the injection blades 15 and 15, and the height of the mixing soil portion mixed with the mixing rotary 16. A pair of left and right gauge rings 17, 17 that support the support base 14, a multi-sheet roll 18 that covers the mixed soil portion of the gauge rings 17, 17 pipe, and the width direction of the multi-sheet drawn from the roll 18 A pair of left and right sheet presser wheels 19, 19 that press both sides, and a pair of left and right earthing rings 20, 20 that press the both sides of the multi-sheet pressed by the sheet presser rings 19, 19, the traveling direction of the tractor 1 They are arranged sequentially from the front.

  A support link 21 extends upward from the support base 14, and two flow meters 22 and 22 for measuring the flow state of the disinfectant 50 are supported on the support link 21. The leading end of the flow pipe 8 opposite to the main tank 3 is divided into two parts, and the two branched ends of the flow pipe 8 are connected to the inlets of the flow meters 22 and 22. It is.

  In the vicinity of the flow meters 22, 22 are a pump port P for taking in the disinfecting liquid 50 sent from the pump 6, a tank port T for sending the taken disinfecting liquid 50 to the sub tank 4, and a taken in disinfecting liquid 50. Two manual lever type 2-position 2-way 3-port switching valves (hereinafter referred to as switching valves) 24, 24 provided with a supply port S for supplying to the injection knife 15 and provided with a switching lever 24a are provided. is there. The outlets of the flow meters 22, 22 are connected to the pump ports P, P of the switching valves 24, 24 via pipes 23, respectively, and the supply ports S, S are sterilized with the injection blades 15, 15. Two supply pipes 25, 25 for supplying the liquid 50 are connected to each other. The tip of the return pipe 10 for returning the disinfectant 50 to the sub tank 4 is divided into two parts, and the tip of the return pipe 10 divided into two parts is connected to the tank port T, It is connected to T via nipples 26 and 26, respectively.

  When the switching valve 24 moves the switching lever 24a toward the supply pipe 25 as shown by white arrows in FIG. 5, the disinfecting liquid 50 sent from the flow pipe 8 is transferred. When the switching lever 24a is moved to the return pipe 10 side and sent to the supply pipe 25, the disinfecting liquid 50 sent from the flow pipe 8 is sent to the return pipe 10. The nipple 26 is fixed to the flow meters 22 and 22 to support the switching valves 24 and 24, and the switching levers 24 a and 24 a are arranged in the vicinity of the driver seat of the tractor 1.

  The supply pipes 25, 25 are provided with check valves 27, 27, and orifice members 28, 28 are provided downstream of the check valves 27, 27. The check valves 27 and 27 and the orifice members 28 and 28 have the same configuration as the check valve 12 and the orifice member 13 provided in the return pipe 10. Further, the distal ends of the supply pipes 25, 25 are connected to the injection blades 15, 15.

  Next, the flow path of the disinfectant 50 will be described. First, the air vent valve 11 is opened, the pump 6 is driven, and the air inside the pump connection pipe 7 is sent to the branch pipe 8a together with the disinfectant 50 as shown in FIG. The air is discharged through the return pipe 10 to the sub tank 4.

  When the discharge of the air is finished, the air vent valve 11 is closed, and the disinfecting liquid 50 stored in the main tank 3 is caused to flow through the flow pipe 8 and the flow meters 22, 22, and the switching valve 24, 24. When the switching lever 24a is moved to the supply pipe 25 side, the disinfecting liquid 50 flows through the supply pipe 25, is supplied to the injection knife 15, and is injected into the soil. When the switching lever 24 a is moved to the return pipe 10 side, the disinfectant 50 flows through the return pipe 10 and is sent to the sub tank 4. As the pump 6 is driven, the disinfecting liquid 50 stored in the main tank 3 is sent out, the pressure in the main tank 3 is reduced, and the disinfecting liquid 50 stored in the sub tank 4 is It flows through the tank connecting pipe 9 and is sucked into the main tank 3.

  In the soil disinfecting apparatus according to the embodiment, the disinfecting solution 50 is sent to the two supply pipes 25 and 25 that supply the disinfecting solution 50 sent from the pump 6 to the plurality of injection blades 15 and 15. Two switching valves 24, 24 for switching are connected to each other, and a return pipe 10 for returning the disinfecting liquid 50 to the sub-tank 4 is connected to the switching valves 24, 24 so that the disinfecting liquid 50 need not be injected. The disinfecting liquid 50 supplied to the sword 15 is passed through the return pipe 10 by the switching valve 24 and returned to the sub tank 4, and the flow rate of the disinfecting liquid 50 sprayed from the injecting sword 15 that injects the disinfecting liquid 50. Increase can be suppressed.

  Further, the switching valve 24 is used by providing the supply pipes 25, 25 and the return pipe 10 with a plurality of check valves 12, 27, 27 and orifice members 13, 28, 28 for adjusting the flow rate of the disinfectant 50. Thus, when the delivery destination of the disinfectant 50 flowing through one supply pipe 25 is switched to the return pipe 10, the flow rate of the disinfectant 50 flowing through the return pipe 10 is changed to the one supply pipe 25. When the sending destination of the disinfecting solution 50 is switched to the substantially same amount as that of the disinfecting solution 50 that has been flowing, a change in the amount of the disinfecting solution 50 that flows through the other supply pipe 25 can be suppressed. In addition, the check valve 27, 27 and the orifice member 28, 28 provided in the supply pipes 25, 25 and the check valve 12 and the orifice member 13 provided in the return pipe 10 are configured in the same manner, so that the sub tank 4 The flow rate of the disinfecting solution 50 returned to the flow rate and the flow rate of the disinfecting solution 50 ejected from the injection blade 15 can be made substantially the same without changing the rotational speed of the pump 6.

  Further, when the pump connection pipe 7 is removed after the disinfection operation is completed and the two switching levers 24a are moved to the return pipe 10 side and the pump 6 is driven, it remains in the flow pipe 8 and the return pipe 10. The disinfecting liquid 50 can be returned to the sub tank 4. Further, by arranging the switching levers 24a and 24a in the vicinity of the driver seat of the tractor 1, the driver can operate the switching levers 24a and 24a while sitting on the driver seat.

  In the soil disinfecting apparatus according to the embodiment, the orifice members 13, 28, and 28 are used. However, a part of the supply pipes 25 and 25 and the return pipe 10 may be formed in an orifice shape. Instead of the orifice members 13, 28, 28, a needle valve or other member for adjusting the flow rate of the disinfecting liquid 50 may be used. In the soil disinfector according to the embodiment, the main tank 3 and the sub tank 4 are used. However, only the large main tank 3 may be used, and the sub tank 4 is further added. It may be. Moreover, the structure which mounts the main tank 3 and the subtank 4 in the rear part of the tractor 1 may be sufficient. Further, instead of the tractor 1, a tiller or other traveling machine body may be used. In FIG. 6, the supply pipes 8 and 8 and the pipe 23 are not shown.

It is a typical side appearance figure showing the important section composition of the soil disinfection machine concerning an embodiment. It is a schematic enlarged view of the vicinity of the main tank of the soil disinfector according to the embodiment. It is a schematic plan view of a main tank and a sub tank of a soil disinfecting machine according to an embodiment. It is a schematic exploded sectional view of an orifice member of a soil disinfecting machine according to an embodiment. It is a simplified expanded side view of the vicinity of the flow meter of the soil disinfecting machine according to the embodiment. It is a schematic enlarged front view of the vicinity of the flow meter of the soil disinfecting machine according to the embodiment. It is a circuit diagram which shows the pipe line of the soil disinfection machine which concerns on embodiment.

Explanation of symbols

1 Tractor (running vehicle)
3 Main tank 4 Sub tank 6 Pump 10 Return pipe 12, 27 Check valve 13, 28 Orifice member 15 Injection knife (nozzle)
25 Supply pipe 24 Switching valve 24a Switching lever

Claims (3)

A traveling machine body, a tank provided in the traveling machine body, storing a disinfecting liquid for disinfecting soil, a pump for sending the disinfecting liquid from the tank, and supplying the disinfecting liquid sent from the pump to a plurality of nozzles In soil disinfectors with multiple supply pipes,
A plurality of switching valves that are respectively connected to the supply pipes and switch the disinfecting liquid delivery destination;
A soil disinfecting machine, comprising: a return pipe connected to the switching valve for returning the disinfecting liquid to the tank.   The soil disinfecting machine according to claim 1, wherein a plurality of adjusting members for adjusting the flow rate of the disinfecting liquid are provided in the supply pipe and the return pipe.   The soil sterilizer according to claim 1 or 2, wherein the adjustment member includes an orifice.

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