JPH0323049Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an air-liquid injector for soil used to inject air-liquid into soil.

[Prior Art] Fig. 7 is a front view showing a conventional air-liquid injector for soil shown in, for example, Japanese Utility Model Application Publication No. 59-92628. A grip at the upper end; 3 is an air supply liquid passageway for pressure-feeding gas and liquid to the injection pipe 1; 4 is an on-off valve provided in the air supply liquid passage 3;
5 is a lever for operating the on-off valve 4, 6 is a driving part at the lower end of the injection pipe 1 equipped with an injection nozzle, 7 is a step plate for driving, and 8 is a metal fitting for introducing outside air provided in the middle of the injection pipe 1. It is.

The conventional air-liquid injector for soil is constructed as described above, and the driving part 6 of the injection pipe 1 is driven into the soil by grasping the handle 2, and the driving is completed by operating the lever 5 and opening the on-off valve 4. Liquid fertilizer, chemical solution, etc. are injected into the soil from the injection nozzle in section 6. At this time, outside air is sucked in from the outside air introduction fitting and air is also injected into the soil at the same time.

[Problems to be solved by the invention] In the conventional air-liquid injection device for soil as described above, there was a problem that the on-off valve 4 was manually operated, which made the work time-consuming and poor workability. .

This invention was made to solve this problem, and the object is to obtain an air-liquid injection tool for soil that does not require manual operation of the on-off valve and can significantly improve workability.

[Means for solving the problem] The air-liquid injector for soil according to this invention has a vertical pipe portion 9
an air supply liquid pipe 9 formed in a T-shape by a horizontal pipe part 9a and a horizontal pipe part 9b and supplied with liquid from below the vertical pipe part 9a, and an on-off valve 11 provided in the middle of the vertical pipe part 9a;
Each lower part 13a can be raised and lowered on both support shafts 12 by two support shafts 12 hanging from the horizontal pipe part 9b so as to sandwich the vertical pipe part 9a, and thrust bearings 22 provided in each lower part 13a. two operating handles 13 that are inserted into the operating handles 13, a bar 14 that is installed so as to straddle each lower part 13a of the two operating handles 13, and a bar 14 that is suspended from the horizontal pipe portion 9b and has an injector at its tip. Driving part 15 equipped with a nozzle
a plurality of injection pipes 15, each liquid quantitative supply device 16 is provided at the upper part of each injection pipe 15 and injects a fixed amount of liquid to the outlet 16b when the pressurized liquid is supplied to the inlet 16a; The opening/closing operation of the opening/closing valve 11 is operated by the leakage prevention opening/closing valve 17 provided in each of the injection pipes 15 on the outlet 16b side of the quantitative supply device 16 and the vertical movement of the bar 14 relative to the injection pipe 15. and a lever 19 that is operated simultaneously by the vertical movement of the bar 14 to open and close the leakage prevention on-off valves 17 at the same time.

[Function] In this device, when the tool is lifted by the operating handle 13, both support shafts 12 slide within the thrust bearing 22 due to their own weight, so each injection pipe 15 is suspended in the lowered position by the air supply liquid pipe 9. ,
As the bar 14 rises at this time, the levers 18 and 19 are operated simultaneously, and the on-off valves 11 and 1 are operated simultaneously.
7 will close all at once, no gas or liquid will be sprayed, and the tool will land on the ground from this lifted position.
When the operating handle 13 is pushed in, each injection pipe 15 that has landed on the ground stops at that position, so the operating handle 1
3 is lowered along both support shafts 12 by the thrust bearing 22, and the lowering of the bar 14 at this time causes the levers 18 and 19 to be operated simultaneously, and the on-off valves 11 and 17 to open at the same time. The liquid is injected onto the ground surface, and by pushing the operation handle 13 further, the injection nozzle is pushed into the ground and gas and liquid are injected into the ground, so the on-off valves 11 and 17 are automatically opened and closed. Manual operation of valves 11 and 17 is not required.

[Example] An example of this invention will be described below with reference to FIGS. 1 to 4. In the figure, reference numeral 9 denotes an introduction pipe formed in a T-shape by a vertical pipe portion 9a and a horizontal pipe portion 9b, and serves as an air supply liquid pipe. 10 is a vertical pipe portion 9a of the introduction pipe 9
A hose for pumping hormones connected to the lower end of the
Reference numeral 11 indicates an on-off valve provided in the middle of the vertical pipe portion 9a of the introduction pipe 9, 12 indicates two support shafts each hanging from the horizontal pipe portion 9b of the introduction pipe 9 so as to sandwich the vertical pipe portion 9a; The lower part 13a is inserted into the support shaft 12 so as to be movable up and down by means of a thrust bearing 22 provided in the lower part 13a, and two operation handles are provided so as to correspond to the two support shafts 12. Reference numeral 14 indicates a bar installed across each lower part 13a of the two operating handles 13, and reference numeral 15 indicates a plurality of injection pipes (four in the drawing) suspended from the horizontal pipe portion 9b of the introduction pipe 9, each of which has a bar at its tip. It has a driving part 15a equipped with an injection nozzle. Reference numeral 16 indicates a liquid quantitative supply device provided at the upper part of each injection pipe 15, 17 indicates a leak prevention on-off valve provided on each injection pipe 15 on the outlet side of each liquid quantitative supply device 16, and 18 indicates operation of the on-off valve 11. With a lever acting as a member, the injection tube 15 of the bar 14
It is operated by vertical movement relative to the 19
are levers that are provided on each of the leakage prevention on-off valves 17 and act as respective operating members, and are operated simultaneously by vertical movement of the bar 14 relative to the injection pipe 15. 20 is a reinforcing bar that connects the four injection pipes 15, 21 is a depth adjustment plate for determining the insertion depth of each injection pipe 15, and 23 is a pressure gauge.

Next, the operation will be explained. When the tool is lifted by the operation handle 13, both support shafts 12 slide inside the thrust bearing 22 due to their own weight, so each injection pipe 15 hangs down to the lowered position by the air supply pipe 9 as shown in FIG. As the bar 14 rises at this time, the levers 18 and 19 are simultaneously moved sideways, and the on-off valves 11 and 17 are closed simultaneously, so that no gas or liquid is injected.

Furthermore, when the tool lands on the ground surface from the lifted state shown in FIG. The bar 14 descends along the support shaft 12, and at this time the bar 14
As the levers 18 and 19 are lowered, the levers 18 and 19 are simultaneously moved vertically, and the on-off valves 11 and 17 are simultaneously opened. At this time, when the on-off valve 11 is opened, the pressurized hormone agent enters the liquid quantitative supply device 16 through the introduction pipe 9, and a fixed amount of hormone agent is injected to the outlet side of the liquid supply device 16. of hormones are injected onto the ground. By pushing the nozzle further into the ground, as shown in FIG. 1, the injection nozzle is pushed into the ground and gas and liquid are injected into the ground.

When the operating handle 13 is lifted from the pushed-in state shown in FIG.
is raised, and each injection pipe 15 is pulled out from underground with each on-off valve 11, 17 closed all at once as shown in FIG.

Here, the liquid quantitative supply device 16 will be explained in detail with reference to FIGS. 5 and 6. In the figure, 160 is a cylindrical main body having an inlet 16a and an outlet 16b, 161 is a liquid volume adjusting cylinder screwed onto the outlet 16b of the main body 160 so as to be able to move along its axis;
A piston 162 is inserted into the main body 160 and is pressed toward the inlet 16a by a first spring 162a. A float 163 is inserted through the center hole 162b of the piston 162 so as to be movable in the axial direction thereof, and is fixed to the piston 162 by a nut 163a and is pressed by a second spring 163b in a direction to close the inlet 16a. 164
is a communication port bored through the piston 162, and is closed by the float 163 at a position where the float 163 stops moving in the direction of the outlet 16b. 165
is a through hole drilled on the center line of the float 163, 16
6 is a pilot valve provided in the through hole 165, and the valve hole 166a formed in the through hole 165 and the valve body 16 are connected to each other.
6b and a third spring 166c that always presses the valve body 166b in the direction of opening. 167
is a stop ring screwed into the entrance side of the through hole 165 to prevent the valve body 166b from popping out. 168 is a gap between the stop ring 167 and the valve body 166b.

Next, the operation will be explained. Now, assume that in the state shown in FIG. 5, no pressure is applied to the inlet 16a (the on-off valve 11 is closed) and the outlet 16b side of the main body 160 is filled with hormones. When the hormone agent is forced into the inlet 16a (the on-off valve 11 is opened), the hormone agent flows in the direction of the arrow 169 and closes the pilot valve 166. When the pilot valve 166 closes, the float 163 moves toward the outlet 16b against the second spring 163b and closes the communication port 164. When the communication port 164 is closed, the piston 162 is moved toward the outlet 16b against the first spring 162a, and pushes out the hormone agent filling the outlet 16b side of the main body 160. When the piston 162 is fixed in the position shown in FIG. 6 by the hormone agent, the hormone agent on the outlet 16b side of the main body 160 is no longer pressurized and is no longer supplied. Next, in the state shown in FIG.
When the pressure is no longer applied to 6a (the on-off valve 11 is closed), the pilot valve 16 first overcomes the pressure of the residual hormone agent on the inlet 16a side of the main body 160.
6 is opened by the third spring 166c, and the residual hormone agent flows into the outlet 16b side of the main body 160 from the gap 168 through the valve hole 166a. When the pressure on the outlet 16b side increases and the pressure on the inlet 16a side decreases, the second spring 163b presses the float 163 toward the inlet 16a, opening the communication port 164, and the residual hormone agent on the inlet 16a side is transferred to the outlet 16b. Flow into the side. Along with this, the piston 162 is also returned to its original position by the first spring 162a, resulting in the state shown in FIG. 5 in which the float 163 closes the inlet 16a. In this state, the pushed out amount of the hormone is replenished to the outlet 16b side and the outlet 16b is refilled.
The b side returns to its original full state.

In the embodiment described above, since a leak prevention on-off valve 17 is provided which is synchronized with the on-off valve 11, it is possible to prevent liquid from leaking from the nozzle when the on-off valve 11 is closed. When there are multiple tubes, the timing of injection can be made the same.

In the above embodiment, four injection pipes 15 were shown, but any number of injection pipes 15 may be used, and it is also possible to inject not only hormones but also liquid fertilizers, sterilizers, insecticides, etc. It doesn't have to be a farm or an orchard.

In the above embodiment, an outside air introduction fitting 8 shown in the conventional injection device in FIG. 7 is installed in the middle of the injection pipe 15.
Air can also be injected by providing this.

[Effects of the invention] As explained above, with this invention, when the operation handle is pushed in and the injection pipe is pushed into the ground, the on-off valve opens, and when the operation handle is lifted, the on-off valve closes, so manual operation of the on-off valve is unnecessary. This has the effect of significantly improving workability without the need for

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of this invention, Fig. 2 is a sectional view taken along the line - of Fig. 1, and Fig. 3 is a sectional view taken along the line -
Figure 4 is a front view of the injection pipe taken out from the soil, Figure 5 is a cross-sectional view of the liquid quantitative supply device, and Figure 6 shows the changed state of Figure 5. The sectional view shown in FIG. 7 is a front view of the conventional one. In the figure, 9 is an introduction pipe, 11 is an on-off valve, 12
13 is a support shaft, 13 is an operating handle, 14 is a bar, 15 is an injection pipe, 16 is a liquid constant supply device, 17 is a leakage prevention on-off valve, 18 and 19 are levers, and 22 is a thrust bearing.

Claims (1)

[Claims for Utility Model Registration] An air supply liquid pipe 9 formed in a T-shape with a vertical pipe part 9a and a horizontal pipe part 9b and supplied with liquid from below the vertical pipe part 9a; An on-off valve 11 provided in the middle, two support shafts 12 hanging from the horizontal pipe part 9b so as to sandwich the vertical pipe part 9a, and thrust bearings 22 provided in each lower part 13a allow each lower part 13a to Two operating handles 13 each are attached to the support shaft 12 so as to be able to rise and fall, a bar 14 is installed so as to straddle the lower portions 13a of the two operating handles 13, and each of the operating handles 14 is suspended from the horizontal pipe portion 9b. Driving part 15 with an injection nozzle at the tip
a, a plurality of injection pipes 15 having a diameter of 15 mm, a liquid quantitative supply device 16 provided at the top of each injection pipe 15 and injecting a fixed amount of liquid to the outlet 16b when pressurized liquid is supplied to the inlet 16a, and a fixed quantity supply of each liquid. device 16
a leak prevention on-off valve 17 provided in each of the injection pipes 15 on the outlet 16b side, a lever 18 that opens and closes the on-off valve 11 by being operated by vertical movement of the bar 14 relative to the injection pipe 15;
and a lever 19 that is operated simultaneously by the vertical movement of the bar 14 to open and close the respective leakage prevention on-off valves 17 at the same time, and when the device is lifted by the operation handle 13, both support shafts 12 are moved. Since each injection pipe 15 slides in the thrust bearing 22 due to its own weight, each injection pipe 15 hangs in the lowered position by the air supply liquid pipe 9, and the bar 1 at this time
4, the levers 18 and 19 are operated at the same time, and the on-off valves 11 and 17 are closed at the same time.
Make sure that gas and liquid are not injected, and when this device lands on the ground surface from this lifted state and pushes in the operating handle 13, each injection tube 15 that has landed on the ground surface will stop at that position, so the operating handle 13 will be thrust. Both support shafts 1 are supported by bearings 22.
At this time, the lowering of the bar 14 causes the levers 18 and 19 to be actuated at the same time, opening the on-off valves 11 and 17 at the same time, and the gas and liquid are injected onto the ground surface. The air-liquid injection tool for soil is characterized in that by further pushing in the operation handle 13, the injection nozzle is pushed into the ground and the air-liquid is injected into the ground.