JPH08331955A - Liquid feeding into ground under tree and liquid injection device - Google Patents

Abstract

PURPOSE: To ensure water, etc., to be efficiently fed to the roots of roadside trees. CONSTITUTION: A relevant worker 22 carries a portable nozzle device 20 and moved to a spot on a sidewalk 38 corresponding to the place over a root 34 and then pulls a jet lever toward himself where directing the nozzle 26 of the nozzle device 20 downward. Thereby, the plunger pump of a liquid force feeder 14 on a water supply tank car 12 is driven and e.g. water is forcedly fed intermittently via a liquid feed hose 28 to the nozzle 26. The forced fed liquid is then intermittently spouted as a jet flow 40, injected into the soil 32 and fed to the root 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid supplying method and a liquid injecting device to a central portion of a tree, which can efficiently supply water, chemicals and the like to street trees and the like.

[0002]

2. Description of the Related Art FIG. 8 shows a conventional sprinkling operation for roadside trees. The same parts as those of the embodiment of the present invention which will be described later are designated by the same reference numerals, detailed description thereof will be omitted, and the main points will be described. The water tank tank 120 is a water tank 12 that stores water.
2, and a water supply pump 124 that sucks water in the water supply tank 122 and pressure-feeds it to the hose 126 is provided in the bed. Paved sidewalk 38
Is higher than the paved road 130, and roadside trees 30 are planted at appropriate intervals. Stone enclosure 36 is each roadside tree 30
The paved walkway 38, which surrounds the root of the, is the ground 39 inside the stone enclosure 36. The worker 22 grasps the tip of the hose 126 and removes water from the tip of the hose 126 to the ground surface 3.
Spread to 9.

[0003]

The problems of the conventional water sprinkling method of FIG. 8 are as follows. (A) Of the water soaked into the soil 32 from the ground 39, the proportion of the water actually reaching the root 34 is small, and the water sprinkling efficiency is poor. (B) The root 34 largely extends horizontally to the outside of the ground 39, and water and chemicals are supplied to the root 34 in this range through the ground 39 in the stone enclosure 36. It is difficult to sufficiently supply water, chemicals, etc. to the roots 34 in the range.

It is an object of the inventions of claims 1 and 4 to provide a liquid supplying method and a liquid injecting device for efficiently supplying water, chemicals and the like to the central part of the tree. It is an object of the invention of claim 2 to provide a method for supplying a liquid to a middle part of a tree, which can appropriately supply a liquid such as water or a chemical solution to the middle part of the tree below the pavement layer. An object of the invention of claim 3 is to provide a method for supplying a liquid to a central portion of a tree, which can increase the arrival depth of a jetted liquid from a nozzle.
An object of the invention of claim 5 is to provide a liquid injection device capable of appropriately selecting the supply of water and the supply of a liquid other than water such as a chemical liquid. An object of the invention of claim 6 is to provide a liquid injection device capable of appropriately adjusting the concentration of a chemical solution or the like. An object of the invention of claim 7 is to provide a liquid injection device capable of improving work efficiency. The object of the invention of claim 8 is to
Another object of the present invention is to provide a liquid injection device that can achieve intermittent injection by omitting parts such as an intermittent valve.

[0005]

The present invention will be described using reference numerals in the drawings corresponding to the embodiments. In the method for supplying a liquid to the central part (34) of a treeland according to claim 1, the jetting liquid (40) is intermittently jetted into the soil (32) at a jetting pressure at which the jetting liquid (40) can reach the central part (34) of the treeland. .

The method for supplying a liquid to the middle part of the tree (34) according to claim 2 is the same as the method for supplying a liquid to the middle part (34) of the tree according to claim 1, further comprising a jet liquid (40) from a nozzle (26). The injection pressure of is set to a value at which the pavement layer (38) on the surface of the soil (32) can be perforated by the injection liquid (40).

In the liquid supply method to the middle tree part (34) according to claim 3, the liquid supply method to the middle part (34) of the tree structure according to claim 1 or 2, further comprises: The injection of 40) is performed by piercing the soil (32) with the nozzle (26).

A liquid injection device (10) according to claim 4 has the components (a) and (b). (A) A liquid pumping device (14) installed at a predetermined place for intermittently pumping the liquid to be pumped (b) movable by a worker (22) to a place away from the installation place of the liquid pumping device (14) A nozzle device (20) including a nozzle (26) for ejecting the pressure-feeding liquid intermittently supplied from the liquid pressure-feeding device (14) via the flexible conduit (28).

A liquid injection device (10) according to a fifth aspect is the liquid injection device (10) according to the fourth aspect, further comprising a liquid pumping device.
(14) is a nozzle (26) that sucks water (68) from the water tank (16).
Pump (66) that discharges liquid (82) to the suction side of the pressure pump (66) that sucks the liquid (82) from the liquid tank (80) that stores the liquid (82) other than water (68) (78) and a control means (74) for controlling driving and stopping of the mixing pump (78).

The liquid injection device (10) according to claim 6 is the same as the liquid injection device (10) according to claim 4 or 5, wherein the liquid pumping device (14) further removes water (68) from the water tank (16). A pump (66) that inhales and discharges to the nozzle (26), a liquid (8
The mixing pump (78) that sucks the liquid (82) from the liquid tank (80) that stores (2) and discharges the liquid (82) to the suction side of the pressure pump (66) and that the discharge flow rate increases in association with the increase in drive rotation speed. ), And a control means (7) for controlling the drive rotation speed of the mixing pump (78).
Have 4).

The liquid injection device (10) according to claim 7 is the same as the liquid injection device (10) according to claim 5 or 6, wherein the nozzle device (20) further comprises a pressure pump (66) and a mixing pump (78). It is equipped with a remote controller (96) that remotely controls the drive rotation speed.

A liquid injection device (10) according to claim 8 is the same as the liquid injection device (10) according to any one of claims 4 to 7, wherein the pressure feed pump (66) further discharges intermittently to the nozzle ( 2
It is a reciprocating pump (66) that intermittently supplies pressure-fed liquid to 6).

[0013]

In the method for supplying a liquid to the central part of the tree (34) according to claim 1, the injection liquid (40) is injected into the soil (32) by intermittent injection from the nozzle (26), and the central part of the tree (34) is injected. Is supplied to. The intermittent injection can sufficiently increase the injection impact pressure with respect to the liquid pumping device (14) having the same ability as compared with the continuous injection.

In the method for supplying a liquid to the central portion (34) of the tree ground according to claim 2, the jet liquid (40) is directed toward the pavement layer (38) by the nozzle (26).
Sprayed from the pavement layer (38) to form perforations in the pavement layer (3).
It is injected into the soil (32) under 8).

In the method for supplying a liquid to the central part (34) of the tree according to claim 3, the nozzle (26) is pierced into the soil (32),
From the soil (32) to the central part of the tree (34), spray liquid (4
Inject 0).

In the liquid injection device (10) according to claim 4, an operator
(22) is capable of moving the nozzle device (20) to an arbitrary location apart from the liquid pumping device (14) within a movement range allowed by the length of the flexible conduit (28) and the like. it can. Then, after moving the nozzle device (20) to the desired location,
6) in a desired direction, and the pressure-fed liquid intermittently fed from the liquid pressure-fed device (14) through the flexible conduit (28) is used as the injection liquid.
Intermittent injection of (40).

In the liquid injection apparatus (10) of the fifth aspect, the control means (74) controls the driving and stopping of the mixing pump (78). When driving the mixing pump (78), a liquid (82) such as a chemical liquid is introduced by the mixing pump (78) to the suction side of the pressure pump (66), whereby a liquid such as a chemical liquid diluted with water (68). (82) is ejected from the nozzle (26). When the mixing pump (78) is stopped, the introduction of the liquid (82) such as a chemical solution to the suction side of the pressure pump (66) by the mixing pump (78) is stopped, which causes the water in the water tank (16) ( Only 68) is pressure-fed to the nozzle (26) by the pressure feed pump (66) and is ejected from the nozzle (26).

In the liquid injection apparatus (10) of the sixth aspect, the control means (74) controls the drive rotation speed of the mixing pump (78). The introduction flow rate of the liquid (82) such as a chemical liquid from the mixing pump (78) to the suction side of the pressure pump (66) increases as the driving rotation speed of the mixing pump (78) increases. Therefore mixing pump (78)
As the drive rotation speed of the nozzle increases, the liquid ejected from the nozzle (26)
The concentration of the liquid (82) such as the drug solution in (40) increases.

In the liquid injection device (10) according to claim 7, an operator
(22) is a pressure pump (66) and a mixing pump (78) by a remote controller (96) at the location where the nozzle device (20) is moved.
Control the drive rotation speed of. The control of the drive rotation speed may include switching of the drive rotation speed of the pressure feed pump (66) and the mixing pump (78) = 0 and ≠ 0. Thereby, the injection of the injection liquid (40) from the nozzle (26) and the suspension of the injection, or the switching between the injection of only the water (68) and the injection of the liquid (82) such as the chemical liquid, etc. of the nozzle device (20). From the place.

In the liquid injection device (10) of the eighth aspect, the reciprocating pump (66) as the pressure pump (66) alternately repeats the suction stroke and the discharge stroke, and thus discharges the pressure fluid intermittently. The nozzle (26) directly receives and ejects the intermittent pumping liquid from the reciprocating pump (66), so that the ejection of the ejection liquid (40) from the nozzle (26) is intermittent ejection.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS. FIG. 1 shows the state of work using the liquid injection device 10 for trees. The tree liquid injecting device 10 includes a water tank vehicle 12 equipped with a liquid pumping device 14 on a bed, and a portable nozzle device 20 that can be lowered from the water tank vehicle 12 and moved to a desired place when working. The liquid pumping device 14 is
Water tank 16 for storing water 68 (FIG. 2) and water tank
A pump device 18 for sucking in the water 68 from 16 and pumping it is provided.
The portable nozzle device 20 has a handle 24 grasped by an operator 22 at the upper end and a pump device 18 at the lower end.
Jets the liquid that has been pressure-fed from the liquid feed hose 28
Nozzles 26 for intermittent injection are provided as 40, respectively. The street trees 30 are planted along the ground 39 at appropriate intervals, and the roots 34 are widely circulated in the soil 32. Stone wall 36
Is made up of a substantially circular array of small stones, and is provided so as to enclose the root of the roadside tree 30 in each roadside tree 30 in a substantially circular shape from the outside. , And paved walkways 38 covering the surface of soil 32
Has become.

FIG. 2 is a block diagram of the liquid injection device 10 for trees. In the liquid pumping device 14, the receiver 48 includes an antenna 50, is supplied with power from a battery 52, and is a motor.
Control the operation of 54. When an engine is used instead of the motor 54, the battery 52 is also charged from the engine. The electromagnetic clutch 58 receives rotational power from the motor 54 via the V-belt 56, and the holding circuit 62 is a relay.
Upon receiving a control signal from the receiver 48 via 60, the electromagnetic clutch 58 is controlled to be ON (power transmission is in contact) and OFF (power transmission is disconnected). Rotational power from the electromagnetic clutch 58 is input to the plunger pump 66 via the non-circular gear device 64. The plunger pump 66 is connected to the water tank 16 via the water suction hose 70.
The water 68 inside is sucked and discharged to the liquid supply hose 28. The rotational power of the crankshaft 212 of the plunger pump 66 is transmitted to the constant amount discharge pump 78 via the coupling 72, the continuously variable transmission 74, and the coupling 76. The constant-quantity discharge pump 78 sucks the concentrated liquid 82 from the liquid tank 80, which stores the concentrated liquid 82 such as chemical liquid (control liquid etc.) or fertilizer liquid, through the liquid suction hose 84, and drives it at a rotational speed of the drive. Discharge to the discharge hose 86 at a proportional discharge flow rate. The concentrated liquid 82 discharged to the discharge hose 86 is mixed with the water 68 from the water supply tank 16 and sucked into the plunger pump 66. The continuously variable transmission 74 is a chemical liquid tank.
The gear ratio R (= output rotation speed / input rotation speed)) is changed steplessly by the swing operation of 80. When the gear ratio R ≠ 0 of the continuously variable transmission 74, the driving rotational speeds of the plunger pump 66 and the constant amount discharge pump 78 are in a proportional relationship with each other. Further, in the continuously variable transmission 74, the gear ratio R = 0 at one end position of the swing range of the speed change lever 88, and at this time, the constant amount discharge pump
The drive rotation speed of 78 becomes zero. The electric cylinder 90 receives the control command from the receiver 48 via the relay 60 and the holding circuit 62 and expands and contracts to change the swing angle of the speed change lever 88.

In the portable nozzle device 20, the pipe 92 extends linearly, the nozzle 26 is provided on the tip end side in the tip end direction, and the handle 24 is connected to the base end side. The ejection lever 94 is disposed inside the inverted triangular handle 24, and
It is gripped by 22 and can swing upward. Transmitter
The 96 is attached to the upper side of the handle 24, has a concentration adjusting lever 98 on the upper surface side, and has an injection switch 100 on the lower surface side that is pushed in and released with the swing of the ejection lever 94. The hood 102 is attached near the nozzle 26 of the pipe 92 so that the attachment position can be changed, and spreads in a taper shape toward the tip end while covering the peripheral portion of the nozzle 26 from the outside.

FIGS. 3 and 4 are structural views showing the plunger pump 66 in cross sections as viewed from the side and the top, respectively. The crankshaft 212 has a circular crankpin portion 214 whose center is offset from the centerline of the crankshaft 212.
Both sides of the shaft 14 are rotatably supported by the case body 218 of the crankcase 216 via bearings 220. The case body 218 has openings closed by lids 222 and 224 on both axial sides of the crankshaft 212. Drive shaft
226 extends parallel to the crankshaft 212, and is 2 in the axial direction.
At points, bearings 228 are rotatably supported by the lid 222 and the case body 218, respectively. The drive-side non-circular gear 230 and the driven-side non-circular gear 232 have non-circular pitch curves, and the drive shaft 226 and the crank shaft 212, respectively.
Are integrally fitted in the direction of rotation and meshed with each other.

The plunger 234 has a crosshead 236 on the base end side which is fitted in the guide 238 of the crankcase 216 and guided in the axial direction of the guide 238. The connecting rod 239 has a large end portion fitted in a circular crank pin portion 214 so as to be relatively rotatable in the circumferential direction, and a small end portion thereof is connected to a cross head 236 via a cross pin 237.

The manifold 240 is joined to the crankcase 216, has a suction port 242 on the lower surface side, and has a discharge port 244 on the upper end surface. Pump chamber 246 is a manifold
It is formed in 240 and communicates with the suction port 242 and the discharge port 244. The suction valve 248 is incorporated between the suction port 242 and the pump chamber 246, is prevented from coming out of the manifold 240 by the plug 250, and prevents the reverse flow of the liquid from the pump chamber 246 to the suction port 242. The discharge valve 252 includes a pump chamber 246 and a discharge port 244.
Installed between the manifold 240 and the plug 254
It prevents the liquid from flowing back from the discharge port 244 to the pump chamber 246. The seal retainers 255 and 256 are fitted and inserted into the joint portion between the crankcase 216 and the manifold 240, and the collars 257 are provided on the inner peripheral sides on both axial sides to hold the oil seals 258 and 260, respectively. It prevents the lubricating oil therein from leaking out through the periphery of the plunger 234. The V-packing 262 is pressed by the seal retainer 256 against the stepped portion of the manifold 240, swells in the radial direction, and comes into sliding contact with the peripheral portion of the plunger 234 on the inner peripheral side,
Holds the seal of the pump chamber 246.

FIG. 5 is a drive mechanism diagram of the plunger 234. The plunger 234 is connected to the crank pin portion 214 of the crank shaft 212 via the connecting rod 239,
Along with the rotation of 212, one half rotation of the crankshaft 212 is the suction stroke, and the volume of the pump chamber 246 is reduced.
The other half rotation of the crankshaft 212 is in the discharge stroke, increasing the volume of the pump chamber 246, which is similar to a conventional plunger pump. In this plunger pump 66, the rotation from a prime mover such as an engine is input to the drive shaft 226, and the drive side non-circular gear 230 and the driven side non-circular gear 2
It is transmitted to the crankshaft 212 via 32. The design and manufacture of the pitch curve of the driving-side non-circular gear 230 and the driven-side non-circular gear 232 are described, for example, in Mechanical Design Vol. 29, No. 11 (1985).
September issue) Page 13 to 18 "Design and production of non-circular gears and their applications (author: Mr. Takashi Yamazaki, Nagaoka Gear Manufacturing Co., Ltd.)" With respect to the uniform rotation speed of the drive shaft 226 (the rotation speed does not change), the crankshaft 212 can increase the rotation speed in the half stroke of the discharge stroke more than the rotation speed in the half rotation of the suction stroke. , Drive side non-circular gear 23
0 and the pitch curve of the driven side non-circular gear 232 are set.

FIG. 6 is a characteristic graph in which the horizontal axis represents the rotation angle of the drive shaft 226 and the vertical axis represents the ratio of the rotational speed of the crankshaft 212 to the displacement and rotational speed of the plunger 234. As a result of setting the pitch curves of the driving side non-circular gear 230 and the driven side non-circular gear 232 as shown in FIG. 5, the rotation angle range of the drive shaft 226 corresponding to the discharge stroke and the suction stroke is 180 °. Significantly changed, eg 90 ° and 270 ° respectively
Has become. As a result, in the crankshaft 212, the rotation speed in the discharge stroke is significantly higher than the rotation speed in the suction stroke, the moving speed of the plunger 234 in the discharge stroke is significantly increased, and the volume of the pump chamber 246 in the discharge stroke is increased. The decrease speed increases, and the discharge pressure of the liquid intermittently discharged from the discharge port 244 increases.

The operation of the liquid injection device 10 for trees will be described. After stopping the water tank car 12 at an appropriate place, the portable nozzle device 20 is lowered from the water tank car 12. Worker 22
Is the place where the handle 24 is gripped and the jet flow 40 is jetted,
That is, toward the ground point where the root 34 extends into the ground. When the worker 22 arrives at the place where the jet flow 40 is jetted, the worker 22 directs the nozzle 26 toward the soil 32 and pulls the jet lever 94 of the handle 24 forward. As a result, the ejection switch 100 of the transmitter 96 is pushed in, and the ejection signal is sent from the transmitter 96 to the receiver 48 of the liquid pressure feeding device 14 by radio waves. As a result, the electromagnetic clutch 58 is brought into the contact state, the plunger pump 66 is driven by the rotational power from the motor 54, and the water 68 sucked from the water tank 16 is supplied.
Is intermittently discharged to the liquid supply hose 28. When the pulling of the injection lever 94 is released, the injection switch 100 returns to the protruding position,
An injection suspension signal is sent by radio waves from the transmitter 96 to the receiver 48 of the liquid pumping device 14. Thus, in the liquid pumping device 14, the electromagnetic clutch 58 is turned off, the transmission of the rotational power from the motor 54 to the plunger pump 66 is stopped, the plunger pump 66 and the constant amount discharge pump 78 are stopped, and the nozzle 26 ejects the liquid. The injection of the injection flow 40 is stopped.

The rotary power transmitted from the motor 54 to the plunger pump 66 is further sent to the constant amount discharge pump 78 via the continuously variable transmission 74 to drive the constant amount discharge pump 78.
As a result, the constant-quantity discharge pump 78 sucks the concentrated liquid 82 in the chemical liquid tank 80 and discharges it to the discharge hose 86, a predetermined amount of the concentrated liquid 82 is introduced into the water absorption hose 70, and the plunger pump 66 discharges the nozzle. Concentrated liquid 82, suitably diluted with water 68, is pumped to 26. When the worker 22 swings the concentration adjusting lever 98, a control signal corresponding to the swing position of the concentration adjusting lever 98 is sent from the transmitter 96 to the receiver 48 of the liquid pressure feeding device 14, and the electric cylinder 90 is Telescopic and transmitter 96
The gear ratio R of the continuously variable transmission 74 is changed by changing the speed change lever 88 of the continuously variable transmission 74 to the rocking position corresponding to the rocking position of the concentration adjusting lever 98. Since the driving rotation speeds of the plunger pump 66 and the constant-quantity discharge pump 78 are proportional to each other, and the discharge flow rates of the plunger pump 66 and the constant-quantity discharge pump 78 are almost proportional to the respective driving rotation speeds, the concentration of the transmitter 96 is reduced. With the swinging operation of the adjusting lever 98, the mixing ratio of the water 68 and the concentrating liquid 82 changes, and the concentration of the concentrating liquid 82 in the jet flow 40 is arbitrarily adjusted.

In the rocking operation of the concentration adjusting lever 98 in the transmitter 96, the gear shift lever 88 of the continuously variable transmission 74 is rocked to one end position of its rocking range to change the gear ratio R of the continuously variable transmission 74. It can also be set to 0, and the continuously variable transmission 74
When the gear ratio R of 0 is set to 0, the constant amount discharge pump 78 is stopped, and the mixing of the concentrated liquid 82 from the discharge hose 86 into the water absorption hose 70 is stopped. At this time, the water in the water supply tank 16 68
Only is pumped to the nozzle 26 and jetted from the nozzle 26 40
Is water 68 without the concentrated liquid 82. When only the water tank 16 is supplied to the root 34 and only air is supplied, the water 68
Only the jet is jetted from the nozzle 26 with the jet stream 40. Of course, the inside of the route such as piping can be cleaned. Further, when performing control, fertilization, etc., a mixed liquid of water 68 and concentrated liquid 82 is jetted from nozzle 26 by jet flow 40.

The plunger pump 66 is of a type in which the intake stroke and the discharge stroke are alternately repeated. Only the water 68 discharged from the plunger pump 66 to the liquid supply hose 28 in the intermittent discharge stroke, or the water 68 and the concentrated liquid are discharged. The mixed liquid of 82 is sent to the nozzle 26, and becomes a jet flow 40 from the nozzle 26 and is intermittently injected into the soil 32. The hood 102 prevents a part of the soil 32 in the vicinity of the ground 39 from being scattered around when the jet stream 40 is injected into the soil 32 as the jet stream 40 is injected. The jet stream 40 reaches the root 34 while opening a through hole in the soil 32. This through hole contributes to the air rate of the soil 32.

Next, typical numerical values and ranges are shown. Driving rotation speed of the plunger pump 66: 180 to 360
r. p. m. Number of injections per second: 3 to 6 times Nozzle hole diameter: φ1.0 to 3.5 mm Injection flow rate per time: 20 to 50 cc Injection pressure: 200 to 700 kgf / cm ^ 2 (plunger pump 66
Discharge amount per stroke of 40cc, plunger pump
When the discharge angle cycle of 66 is 90 ° with respect to the 360 ° rotation angle of the drive shaft 226 and the diameter of the nozzle 26 is φ3 mm, the injection pressure is 300 kgm / cm ^ 2. With a nozzle hole diameter of 1.0 mm, 700 kg
Reaching f / cm ^ 2, it is possible to make a sufficient hole in the asphalt pavement 38. ) Reaching depth of one jet 40: 20 to 50 cm (1
It is assumed that the amount of injection is 20 to 50 cc / stroke and the soil 32 has a general hardness. In addition, 15-25 at the same point
If injection is repeated, that is, for 3 to 4 seconds, the injection flow is finally
40 is predicted to reach a depth of more than 1 m. )

It is possible to replace the nozzle 26 and increase or decrease the injection pressure of the injection flow 40. When the ground surface of the soil 32 is covered with the paved sidewalk 38 as shown in FIG. 1 instead of the exposed ground 39 of the soil 32 as shown in FIG.
The nozzle is replaced with a high injection pressure type nozzle 26 of 100 to 700 kg / cm ^ 2, and an injection flow 40 is injected. In this case, the jet stream 40 will be perforated in the paved walkway 38 and injected into the jet stream 40 below the paved walkway 38, thus injection from above the paved surface is also possible.

The nozzle 26 shown in FIG.
Although 40 is sprayed, the tip of the pipe 92 is pierced into the ground 39 to an appropriate depth, and the tip of the pipe 92 is pierced into the soil 32 by about 5 to 10 cm. The jet stream 40 can be jetted by pulling the jet lever 94. This can increase the arrival depth of the jet flow 40.
Further, even if the piercing depth of the pipe 92 when the first jet 40 is jetted is small, while the jet 40 is repeatedly jetted at the stab site, the soil 32 at the tip of the pipe 92
Can be softened, the piercing depth of the pipe 92 can be gradually increased, and finally the jet flow 40 can reach the root 34.

FIG. 7 is a block diagram of another tree liquid injection device 10. This tree liquid injection device 10 uses a known triple plunger pump 114 including three plunger pumps that are operated with a phase angle shifted by 120 ° and have a common discharge port and suction port. . The triple plunger pump 114 receives rotational power from the electromagnetic clutch 58 without interposing the non-circular gear device 64 (FIG. 2) between the triple plunger pump 114 and the discharge pipe 106, and only the water 68 or the water 68 and the concentrated liquid 82 are supplied to the discharge pipe 106. Discharge the mixed liquid with. The intermittent valve 104 includes a cam that rotates in synchronization with the triple plunger pump 114 by the rotational power transmitted from the electromagnetic clutch 58, and the rotation of this cam causes the valve element to reciprocate to move the liquid supply hose 28 and the discharge pipe. It is designed to open between 106 and intermittently. The accumulator 108 includes a piston 110 that increases or decreases the volume of the gas chamber 112 according to the pressure fluctuation of the discharge pipe 106, and smoothes the discharge pressure of the discharge pipe 106.
By opening and closing the intermittent valve 104, the water 68 and the concentrated liquid 82 are intermittently delivered from the discharge pipe 106 to the liquid supply hose 28, and the jet flow 40 is intermittently jetted from the nozzle 26.

[0037]

According to the first and fourth aspects of the present invention, since the injection liquid is injected into the soil by the intermittent injection of the injection liquid from the nozzle into the ground, the injection liquid is supplied to the middle part of the tree in the soil.
The liquid can be efficiently supplied to the middle part of the tree ground having a predetermined depth from the ground.

According to the second aspect of the present invention, since the pavement layer can be perforated by the jetting liquid and the jetting liquid can be injected into the soil below the pavement layer, the liquid can be efficiently supplied to the middle of the tree ground below the pavement surface.

According to the third aspect of the present invention, the nozzle is pierced into the soil and the jetting liquid is jetted from the nozzle. Therefore, the reachability of the jetting liquid to the middle part of the tree can be improved.

In the fifth aspect of the present invention, it is possible to appropriately select the injection of only water or the liquid other than water such as the chemical liquid by driving and stopping the mixing pump.

According to the sixth aspect of the invention, the concentration of the chemical liquid or the like ejected from the nozzle can be appropriately adjusted by controlling the drive rotation speed of the liquid pressure feeding device.

According to the seventh aspect of the invention, the work efficiency can be improved by controlling the pressure pump and the mixing pump from the location of the nozzle device by using the remote controller.

In the eighth aspect of the present invention, the intermittent injection is achieved by utilizing the intermittent discharge of the reciprocating pump, so the elements such as the intermittent valve can be omitted and the apparatus can be simplified.

[Brief description of drawings]

FIG. 1 is a view showing a state of work using a tree liquid injection device.

FIG. 2 is a configuration diagram of a tree liquid injection device.

FIG. 3 is a structural view showing a cross section of the plunger pump as viewed from the side.

FIG. 4 is a structural diagram showing a cross section of the plunger pump as seen from above.

FIG. 5 is a drive mechanism diagram of a plunger.

FIG. 6 is a characteristic graph in which the horizontal axis represents the rotation angle of the drive shaft and the vertical axis represents the displacement of the plunger and the ratio of the rotation speed of the crankshaft to the rotation speed.

FIG. 7 is a configuration diagram of another tree liquid injection device.

FIG. 8 is a diagram showing a conventional sprinkling work on a roadside tree.

[Explanation of symbols]

 10 Tree Liquid Injecting Device (Liquid Injecting Device) 14 Liquid Pressurizing Device 16 Water Supply Tank (Water Tank) 20 Portable Nozzle Device (Nozzle Device) 22 Worker 26 Nozzle 28 Liquid Sending Hose (Flexible Pipe) 32 Soil 34 Root (Central part of tree) 38 Paved walkway (paved layer) 66 Plunger pump (reciprocating pump) 74 Continuously variable transmission (control means) 78 Constant discharge pump (mixing pump) 80 Chemical liquid tank (liquid tank) 82 Concentrated liquid ( Liquid) 96 transmitter (remote controller)

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[Procedure amendment]

[Submission date] July 21, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

FIG. 6 is a characteristic graph in which the horizontal axis represents the rotation angle of the drive shaft 226 and the vertical axis represents the displacement and speed ratio of the plunger 234. Drive-side non-circular gear 230 and driven-side non-circular gear 232
As a result of the pitch curve of FIG. 5 being set as shown in FIG. 5, the rotation angle range of the drive shaft 226 corresponding to the discharge stroke and the suction stroke is 1
Greatly changed from 80 °, eg 90 ° each
And 270 °. This allows the crankshaft 21
2, the rotation speed in the discharge stroke is significantly higher than the rotation speed in the suction stroke, the moving speed of the plunger 234 in the discharge stroke is greatly increased, and the pump chamber 246 in the discharge stroke is increased.
The decrease rate of the volume of the liquid increases and the discharge pressure of the liquid intermittently discharged from the discharge port 244 increases.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

FIG. 6 is a characteristic graph in which the horizontal axis represents the rotation angle of the drive shaft and the vertical axis represents the displacement and speed ratio of the plunger.

Claims (8)

[Claims] 1. A tree characterized by intermittently jetting the jetting liquid (40) into the soil (32) from a nozzle (26) at a jetting pressure at which the jetting liquid (40) can reach the central part (34) of the tree. Liquid supply method to the underground part. 2. The injection pressure of the injection liquid (40) from the nozzle (26) is the pavement layer (3) on the surface of the soil (32) by the injection liquid (40).
8. It is set to a value that can be punched in 8).
A method for supplying a liquid to the central portion of the described woodland. 3. The treeland according to claim 1, wherein the injection liquid (40) is ejected from the nozzle (26) by piercing the soil (32) with the nozzle (26). Liquid supply method to the central part. 4. An operator (a) which is installed at a predetermined location and intermittently pumps the liquid to be pumped, and (b) an operator who is away from the installation location of the liquid pumping device (14). A nozzle device (20) provided with a nozzle (26) which is movable by (22) and which ejects the pressure-feeding liquid intermittently supplied from the liquid pressure-feeding device (14) through a flexible conduit (28). ), Has a liquid injection device. 5. The liquid pumping device (14) comprises a water tank (16).
A pressure pump (66) for sucking water (68) from the nozzle and discharging it to the nozzle (26), a liquid tank for storing a liquid (82) other than the water (68)
A mixing pump (78) for sucking the liquid (82) from (80) and discharging it to the suction side of the pressure pump (66), and the mixing pump
The liquid injection device according to claim 4, further comprising a control means (74) for controlling driving and stopping of the (78). 6. The liquid pumping device (14) comprises a water tank (16).
A pressure pump (66) for sucking water (68) from the nozzle and discharging it to the nozzle (26), a liquid tank for storing a liquid (82) other than the water (68)
A mixing pump (78) that sucks the liquid (82) from the (80) and discharges it to the suction side of the pressure pump (66), and the discharge flow rate increases in association with an increase in drive rotation speed, and the mixing pump. (7
The liquid injection device according to claim 4 or 5, further comprising a control means (74) for controlling the drive rotation speed of 8). 7. The nozzle device (20) is the pressure pump.
The liquid injection device according to claim 5 or 6, further comprising a remote controller (96) for remotely controlling the drive rotational speeds of the (66) and the mixing pump (78). 8. The pressure pump (66) is a reciprocating pump (66) which intermittently discharges and intermittently supplies a pressure liquid to the nozzle (26). 7. The liquid injection device according to any one of 7.