JP3336707B2 - High pressure liquid injection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure liquid injection device for activating a soil by injecting a high-pressure liquid into soil such as a turf or a golf course.

[0002]

2. Description of the Related Art The applicant of the present invention has proposed in the past an apparatus for injecting a high-pressure liquid into soil such as turf to perform aeration work. Means for setting the discharge amount and the number of actuations of the electromagnetic valve are provided, and an operator performs the work by setting the discharge amount and the number of actuations while looking at the vehicle speed table.

[0003]

When a high-pressure liquid is injected by using the above-described conventional apparatus, impurities and the like mixed in the liquid are injected because the diameter of the nozzle is as small as 0.8 mm to 1.0 mm. It may be clogged at the outlet, particularly when ejecting a drug containing metallic particles such as a wettable powder. For this reason, the worker has to work while always feeling uneasy whether the liquid is being ejected according to the ejection pattern set by himself.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is possible to perform a jetting operation as set, and even if the jetting pattern is not set as described above, An object of the present invention is to provide a high-pressure liquid injection device capable of reliably informing an operator. Therefore, the following technical measures were taken. That is, a liquid tank for storing liquid, a high-pressure pump driven by rotational power, a pressure-regulating tank for temporarily storing liquid pressurized by the high-pressure pump, and ejection of the pressurized liquid. A high-pressure liquid injection device comprising a plurality of ejection nozzles for controlling the control valve and intermittently operating the control valve to inject the liquid into the soil. Connecting a setting device for setting a spraying amount and a detector for detecting a liquid consumption amount in a liquid tank;
When the set value by the sensor does not match the detected value by the detector , the notifying means connected to the controller is operated.
The configuration of the high-pressure liquid injection apparatus characterized by being configured so.

[0005]

Embodiments of the present invention will be described below with reference to the embodiments shown in the drawings. First, the structure will be described. A supporting machine frame 5 is provided at the rear of the body of the tractor 1 via a three-point link mechanism 4 including lower links 2 and 2 and a top link 3.
And a high-pressure liquid injection device 6
And the high-pressure liquid injection device 6 is raised and lowered by operating the hydraulic lifting device 7 of the tractor-1 up and down.

The high-pressure liquid injection device 6 includes a liquid tank 9 for storing a chemical solution, water, and the like, a high-pressure pump 11 driven by receiving rotational power from a PTO shaft 10 of the tractor 1, and a high-pressure liquid sent from the high-pressure pump 11. Tank 12 for temporarily storing pressure, and 16 ejection nozzles 13 for ejecting a high-pressure liquid. The electromagnetic valve 15 is turned on and off intermittently.
By performing the OFF control, a high-pressure liquid is ejected from the nozzle 1
3 erupted into the soil.

In this embodiment, there are four electromagnetic valves 15, and four ejection nozzles 13 are provided below each electromagnetic valve 15. The energization of the electromagnetic valve 15 is performed by a command from a controller 17 described later. Controller 17
Is connected to a setting dial 19 for setting a spray amount per unit time and a level sensor 20 for detecting a consumption amount of the liquid in the liquid tank 9. When an output condition is set by the setting dial 19, a rectangular pulse signal is output from a pulse generating means (not shown), and a valve driving pulse is given to the electromagnetic valve 15 via a valve driving output section that performs an amplifying operation. In this embodiment, the period of the pulse is configured to be changeable, and the number of operations of the electromagnetic valve 15 is determined by changing the period (or frequency). A buzzer 22 as an alarm is connected to the output side of the controller 17 so that the buzzer 22 sounds when a set amount of the chemical is not ejected as described later. are doing. In addition,
The buzzer 22 is installed near the cockpit of the tractor 1, but the controller 17 may be installed on the supporting machine frame 5 side.

On the other hand, the switch box 30 to which the start switch 27 and the stop switch 28 for starting jetting are attached is easy to waterproof and needs to be frequently operated. Is mounted on the fender 8 of the tractor-1. The switch box 30 may be provided anywhere as long as the operator can easily perform the operation at hand. For example, in the case of a tractor 1 with a cabin or a rope, the switch box 30 may be installed on a ceiling, a center pillar, or the like.

Reference numeral 32 denotes a power switch provided in the switch box 30, 38 denotes a battery, 39 denotes a pressure regulating valve, and 40 denotes a pressure gauge. Next, a specific mounting structure of the ejection nozzle unit 41 constituting the high-pressure liquid injection device 6 will be described. FIG. 2 is a perspective view of the ejection nozzle unit 41,
In this embodiment, there are two sets of the ejection nozzle units 41. Pins 43, 4 are provided at the rear ends of the rod-shaped arms 42, 42, respectively.
At 3 it is pivotally mounted so that it can move up and down. Since the left and right ejection nozzle units 41 have the same configuration, only the configuration of one ejection nozzle unit 41 will be described. 4
Numeral 4 denotes a sled-shaped plate body, and a receiving frame 46 is fixed on a support table 45 erected along the front and rear direction on the plate body 44, and a nozzle support pipe is provided between a pair of left and right receiving frames 46, 46. An insertion support 48 is provided so that the nozzle support tube 48 can be rotated around a horizontal axis. For this reason, the ejection angle of the ejection nozzle 13 can be adjusted to some extent. Reference numeral 50 denotes an insertion pipe that connects the electromagnetic valve 15 and the nozzle support pipe 48 to each other.

The high-pressure liquid intermittently controlled by the electromagnetic valve 15 passes through the insertion pipe 50 and is jetted into the soil from the tip of the nozzle 13 via the nozzle support pipe 48. Note that reference numeral 5 in FIG.
Reference numeral 2 denotes a through hole formed in the lower surface of the plate body 44 and is provided to face the nozzle 13. Reference numeral 53 denotes a pin provided at the rear of the arm rod 42 along the front-rear direction. The entire ejection nozzle unit 41 can be swung about the axis of the pin 53. Also, the arm rods 42, 4 with respect to the supporting machine frame 5
The vertical rotation of 2 is performed by an electric motor 54. A limit switch is provided between the supporting machine frame 5 and the turning base of the arm rod 42, and a safety circuit is incorporated so that the electromagnetic valve 15 does not operate when the limit switch is turned on.

That is, when the arm rod 42 is pulled up by the electric motor 54 and is moved to the non-working posture, the limit switch is turned on, the safety circuit is activated, and the arm rod 4 is turned on.
When 2 is lowered by a predetermined angle or more and becomes a working posture, the limit switch is turned off, and the electromagnetic valve 15 can be energized. FIGS. 5 to 7 disclose a specific configuration of the pivot support portion of the arm rod 42 (however, the limit switch is omitted), 57 is a pivot shaft, and 58 is integral with the arm rod 42. A cylindrical boss 59 fitted on the pivot shaft 57 is provided with a locking plate fixed to the arm rod 42.
The bosses 60 are outside the cylindrical boss 58 and fitted to the pivot shaft 57. A plate 61 is fixed to the boss 60 so as to contact the locking plate 59 from below, and a tension spring 63 is interposed between the boss 60 and the machine frame. When the operation is performed with the cylinder 64 of the electric motor 54 shortened, the locking plate 59 is separated from the plate 61, so that the arm rod 42 can freely move while following the unevenness of the ground. Can move up and down. In this case, since the pulling force of the spring 63 does not act, the ejection nozzle unit 41 is not easily lifted by the reaction force at the time of ejection. On the other hand, when the arm 64 is pulled up by extending the cylinder 64 of the electric motor 54, the boss 60 shown in FIG.
Is rotated counterclockwise, and the plate 61 contacts the locking plate 59 to raise the arm rod 42. In this case, since the tension spring 63 is interposed, the pulling force of the electric motor 54 can be reduced. If the elastic force of the spring 63 is made strong, the capacity of the motor 54 may be small, and the price of the apparatus can be reduced.

Next, the operation will be described with reference to the flowchart of FIG. First, the operator operates the setting dial 19 to set the spray amount. The theoretical spray amount W is obtained by the product of the discharge amount Q per pulse, the frequency F, and the actual working time H (W = H × F × Q). On the other hand, the consumption amount W0 is obtained from the level sensor 20, and the liquid reduction amount in the predetermined time H is calculated. The spray amount W and the consumption amount W0 are compared, and if they do not match, the buzzer 22 is sounded. Possible causes of the discrepancy include a case where mineral particles contained in the wettable powder or the like are clogged in the nozzle of the nozzle 13 or a case where a set spray amount cannot be secured due to a pressure drop in the flow path. .

Next, the operation will be described. The engine of the tractor-1 is started to rotate the PTO shaft 10, and the high-pressure pump 1
1 is driven. Then, before starting the work, first, the power switch 32 of the switch box 30 is turned on. Next, output conditions are set using the dial 19 for setting the amount of application.

When a switch (not shown) is operated to lower the arm rod 42, the jet nozzle unit 41 is landed, and then the start switch 27 is pressed to start work.
A pulse current having a constant period is applied to the coil of the electromagnetic valve 15, and the plunger is vibrated little by little so that high-pressure liquid is ejected intermittently from the tip of the nozzle 13. The pressure of the liquid at this time is controlled by the pressure regulating valve 39 so as to be about 250 kgf to 350 kgf / cm ² .

The high-pressure liquid jetted into the soil from the tip of the jet nozzle 13 travels through the soil like a bullet and reaches a predetermined depth while loosening the hardened soil. At this time, the roots of the turf are appropriately cut off, so that root growth is promoted. The ejection of the high-pressure liquid from the ejection nozzle 13 is continuously performed until the stop switch 28 is pressed.
Even if the stop switch 28 is not pressed, if the limit switch is turned on or if a valve error signal to the electromagnetic valve 15 is detected, a command to stop the generation of a pulse is issued, and the valve is driven. Stop the operation of the output unit.

The work is performed in this manner. If the liquid is not sprayed as set during the work, the buzzer 22 sounds and the operator is notified of the abnormal state. The work can be performed with a sense of security as compared with the conventional method, and the problem of ending the work without noticing that the chemical solution has not been ejected is also solved.

Finally, a partial improvement of the apparatus will be described.
FIG. 8 illustrates the display panel mechanism of the device. A number setting dial 66 and an amount setting dial 67 are connected to the controller 17, and a vehicle speed sensor 68 for detecting the traveling speed of the aircraft is connected. Number setting dial 66
Sets the frequency, and the amount setting dial 67 sets the amount of ejection per pulse.
That is, the open time is determined. Input the above signal
The work application amount W, work area S, and application amount A per unit area are calculated and displayed. The work application amount W is obtained by the product of the frequency f, the operation time H, and the ejection amount Q, the operation area S is obtained by the product of the operation width b, the vehicle speed V, and the operation time H, and the application amount A per unit area is obtained by the operation. It is calculated by dividing the application amount W by the work area S. By displaying such data on the monitor of the display panel, the necessary minimum information is sent to the worker in real time, which can be useful for work on the green.

FIG. 10 shows a configuration in which on-off valves 70 and 71 are provided at a branch in the high-pressure liquid flow path. These on-off valves 70,
Reference numeral 71 has a cross-sectional structure as shown in FIG. 11, so that the high-pressure liquid can flow to both the left and right, or to the right or left flow path. Therefore, the flow path can be switched according to the working conditions when the working place is narrow or wide, or according to the degree of clogging, and the high-pressure liquid can be ejected from any nozzle.

[0019]

As described above, the high-pressure liquid injection device according to the present invention comprises a liquid tank storing a liquid, a high-pressure pump driven by rotating power, and a liquid pressurized by the high-pressure pump. Equipped with a pressure regulating tank for temporarily storing, a plurality of ejection nozzles for ejecting the pressurized liquid, and a control valve. The control valve is operated intermittently to inject the liquid intermittently into the soil. In the high-pressure liquid injection device,
A setting device for setting a spray amount to a controller of the high-pressure liquid injection device and a detector for detecting a liquid consumption amount in the liquid tank ;
And further, the set value by the setting device and the detector
If the detected value by the mismatch is obtained by configured to actuate the alarm means connected to the controller
From inconvenience results in a high pressure liquid injection operation without abnormally notice it does not occur at all, can be satisfactorily high pressure liquid injection operation.

[Brief description of the drawings]

FIG. 1 is a side view of the device.

FIG. 2 is a perspective view of a jet nozzle unit.

FIG. 3 is a development view showing the relationship of the entire apparatus.

FIG. 4 is a flowchart illustrating the operation.

FIG. 5 is a side view of a lifting mechanism of the arm rod portion.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is an enlarged side view.

FIG. 8 is a block diagram of a monitor part.

FIG. 9 is a development view of a main part.

FIG. 10 is a sectional view of a main part.

[Explanation of symbols]

 Reference Signs List 1 tractor 4 3-point link mechanism 5 support frame 6 high-pressure liquid injection device 9 liquid tank 11 high-pressure pump 12 pressure regulating tank 13 ejection nozzle 15 electromagnetic valve 17 controller 19 spray amount setting dial 20 level sensor 22 notification means (buzzer) −)

Claims (1)

(57) [Claims] 1. A liquid tank for storing a liquid, a high-pressure pump driven by rotating power, a pressure-regulating tank for temporarily storing a liquid pressurized by the high-pressure pump, A high-pressure liquid injection device comprising: a plurality of ejection nozzles for ejecting liquid; and a control valve, wherein the control valve is intermittently operated to intermittently inject the liquid into the soil. Setting device to set spray amount on controller and detection to detect liquid consumption in liquid tank
Connected to a setting device, and further, the set value by the setting device and the detection
If the detected value by the output device do not match, high pressure liquid injection apparatus characterized by being configured to actuate the alarm means connected to the controller.