JPH08238012A - Injection amount control method by high-pressure liquid injection vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] Plunger pump 68 while running on turf 34.
The injection liquid 72, which is intermittently discharged from the
In the high-pressure liquid injection vehicle 10 that intermittently injects toward 34 and injects into the soil 36 under the turf 34, the actual injection amount of the injection liquid 72 per 1 m ^ 2 is accurately controlled to a predetermined set injection amount. It can be so. [Structure] The electromagnetic pickups 82 and 84 generate pulses in accordance with the rotation of the output shaft 54 and the drive shaft 126. CPU86 is
The pulse signals from the electromagnetic pickups 82 and 84 are processed as the traveling speed and the driving speed of the plunger pump 68, and the actual injection amount q is displayed on the actual injection amount digital display 90 of the display / operation unit 26 of the driver's seat 18. The operator adjusts the actual injection amount digital display 90 to show the set injection amount.
The traveling speed control throttle lever 96 and / or the pump drive speed control throttle lever 98 are operated to change the traveling speed and the drive speed of the plunger pump 68.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling an injection amount by a high-pressure liquid injection vehicle that intermittently injects an injection liquid from a nozzle while injecting it into a soil while traveling on a lawn or the like. The present invention relates to an injection amount control method by a high-pressure liquid injection vehicle capable of controlling a set injection amount.

[0002]

2. Description of the Related Art In a grass field such as a golf course, a high pressure liquid injection vehicle is run on the grass field for controlling pests and growth of the grass.
High-pressure intermittent injection of chemicals and liquid fertilizer from nozzles is injected into the soil.

The injection amount of a drug or the like per unit area needs to be within an appropriate range. The conventional procedure for injecting a drug or the like with a high-pressure liquid injection vehicle is performed in the following procedure. (A) In accordance with application standards such as chemicals for control and fertilization, the injection amount per 1 m ^ 2 (in this specification, the square is represented by ^ 2) is determined as the set injection amount (liter / m ^ 2). (B) From the set injection amount and the pump discharge amount, the traveling speed V (m / s) of the high-pressure liquid injection vehicle is calculated as the set traveling speed according to the following formula. Set injection amount = 0.0167 · Q / (L · V) where Q is the discharge flow rate of the pump (liter / min), L
Is the width (m) of the nozzle row. (C) The throttle lever of the traveling engine and / or the shift lever of the transmission are adjusted so that the high-pressure liquid injection vehicle travels at the calculated set traveling speed. (D) The injection work is started while the high-pressure liquid injection vehicle is running. (E) In the middle of the injection work, measure the injection amount of the injection liquid from the residual amount gauge of the injection liquid tank, determine the drug injection amount per 1 m ^ 2, and check whether it is appropriate.
If it is not within the proper range, readjust the throttle lever of the running engine and / or the shift lever of the transmission.
In this case, the traveling speed of the high-pressure liquid injection vehicle during the injection work is such that, assuming that the discharge amount of the pump is constant, the injection pitch (the small holes are formed in the ground due to the intermittent injection to the ground, the distance between the holes in the traveling direction). Is the “injection pitch”.) It can be calculated by measuring P. (F) The high-pressure liquid injection vehicle is caused to travel at the traveling speed after readjustment, and the injection work is restarted. (G) Repeat the above (e) and (f) as appropriate.

[0004]

The problems of the conventional injection work are as follows. (A) Whether or not the actual injection amount is the set injection amount requires measuring the consumption amount of the injection liquid and the pitch interval during the injection work, resulting in poor work efficiency. (B) The injection amount per unit area becomes too large or too small depending on the location, which may cause chemical damage or the control effect may be insufficient, and the injection work may be required again for correction. (C) As the actual injection amount deviates from the set injection amount,
The injection liquid often runs short or, on the contrary, remains in a large amount.

An object of the invention of claim 1 is to provide an injection amount control method by a high-pressure liquid injection vehicle which can overcome the above problems (a) to (c). It is an object of the inventions of claims 2 to 5 to further provide an injection amount control method by a high-pressure liquid injection vehicle that improves the operation efficiency.

[0006]

The present invention will be described using reference numerals in the drawings corresponding to the embodiments. The method for controlling the injection amount by the high-pressure liquid injection vehicle (10) according to claim 1, wherein the reciprocating pump (68) for intermittently discharging the injecting liquid (72), the reciprocating pump (68) arranged in a line in the left-right horizontal direction, is intermittent from the reciprocating pump (68). A plurality of injection nozzles (32) for intermittently injecting the injecting liquid (72) sent to the ground (34) and injecting it into the soil (36), a traveling speed detecting means (82) for detecting a traveling speed Pump driving speed detecting means (84) for detecting the driving speed of the reciprocating pump (68), and traveling speed detecting means
(82) and an actual injection amount display means (90) for displaying the actual injection amount per constant area calculated based on the detection values of the pump drive speed detection means (84). Then, the actual injection amount is increased or decreased by the injection amount control means (96, 98) so that the display value of the actual injection amount display means (90) becomes the set injection amount.

In the injection amount control method by the high pressure liquid injection vehicle (10) according to claim 2, in the injection amount control method by the high pressure liquid injection vehicle (10) according to claim 1, the injection amount control means (96) further comprises:
It is a traveling speed control means (96) for controlling the traveling speed. The traveling speed display means (92) for displaying the traveling speed detected by the traveling speed detecting means (82) and the traveling speed control means (96) are arranged in a positional relationship.

In the injection amount control method by the high pressure liquid injection vehicle (10) of claim 3, in the injection amount control method by the high pressure liquid injection vehicle (10) of claim 1, the injection amount control means (98) further comprises:
Reciprocating pump drive speed control means (98) for controlling the drive speed of the reciprocating pump (68). Injection pitch interval display means (94) for displaying the injection pitch interval calculated based on the detection values of the traveling speed detection means (82) and the pump drive speed detection means (84)
And the reciprocating pump drive speed control means (98) are arranged in positional relationship with each other.

The injection amount control method by the high pressure liquid injection vehicle (10) according to claim 4 is the high pressure liquid injection vehicle according to any one of claims 1 to 3.
In the injection amount control method according to (10), further, an upper limit exceeded display means (104) and a lower limit exceeded display indicating that the actual injection amount displayed on the actual injection amount display means (90) exceeds the upper and lower limits. Equipped with means (106). Then, the injection amount control means (96, 98) is operated based on the displays of the upper limit excess display means (104) and the lower limit excess display means (106), and the display value of the actual injection volume display means (90) is set. To be in quantity.

In the injection amount control method by the high pressure liquid injection vehicle (10) according to claim 5, the injection amount control method by the high pressure liquid injection vehicle (10) according to claim 4, further comprising an upper limit excess display means (104).
Also, the lower limit excess display means (106) blinks to indicate that the upper limit and the lower limit are exceeded.

[0011]

In the method of controlling the injection amount by the high-pressure liquid injection vehicle (10) according to claim 1, the reciprocating pump (68) intermittently discharges the injection liquid (72), and the intermittently discharged injection liquid (72) is Direct injection nozzle
It is sent to (32), sprayed from the spray nozzle (32) to the ground (34), and injected into the soil (36) below the ground (34). Reciprocating pump to inject the injection liquid (72) into the soil (36) per unit time
The injection area per unit time is proportional to the driving speed of (68) and is the product of the running speed and the spraying width (= the distance between the nozzles at the left and right ends). The actual injection amount per unit area is obtained by dividing the injection amount of the injection liquid (72) into the soil (36) per unit time by the injection area per unit time. High Pressure Liquid Injection Vehicle (10)
The traveling speed and the driving speed of the reciprocating pump (68) are detected by the traveling speed detecting means (82) and the pump driving speed detecting means (84), respectively, and the actual injection amount per constant area based on these detection values, Calculated and the actual injection amount display means (9
It is displayed in 0). The injection amount is increased or decreased by the injection amount control means (96, 98) so that the display value of the actual injection amount display means (90) becomes the set injection amount.As a result, during the injection work, the actual injection amount is the set injection amount. Is controlled accurately.

In the injection amount control method by the high-pressure liquid injection vehicle (10) according to claim 2, the actual injection amount per certain area decreases as the traveling speed increases, and the traveling speed becomes the traveling speed control means (96). It changes with. Therefore, the traveling speed control means
By changing the traveling speed by (96), the actual injection amount per constant area changes. When changing the traveling speed, the traveling speed control means (96) arranged in positional relation with the traveling speed display means (92) for displaying the traveling speed.
Is operated, as a result, the traveling speed changes, and the display value of the traveling speed display means (92) also changes.

In the injection amount control method by the high-pressure liquid injection vehicle (10) of the third aspect, the number of injections of the injection liquid (72) from the injection nozzle (32) per unit time is the number of reciprocating pumps per unit time.
It corresponds to the number of times of ejection of (68) and is inversely proportional to the injection pitch interval. In addition, since the discharge amount of the reciprocating pump (68) once is constant, the injection amount of the injection liquid (72) from the injection nozzle (32) increases as the driving speed of the reciprocating pump (68) increases. Increase. Therefore, by changing the driving speed of the reciprocating pump (68) by the reciprocating pump driving speed control means (98), the actual injection amount per fixed area changes. The injection pitch interval display means (94) is provided so as to be positionally associated with the reciprocating pump drive speed control means (98), and displays the injection pitch interval. When changing the injection pitch interval, the reciprocating pump drive speed control means (98) arranged in association with the injection pitch interval display means (94) is operated, and along with this operation, the result, the injection pitch interval and the actual The injection amount changes, and the display values of the injection pitch interval display means (94) and the actual injection amount display means (90) also change.

In the injection amount control method using the high-pressure liquid injection vehicle (10) of claim 4, the upper limit excess display means (104) and the lower limit excess display means (106) are such that the actual injection amount exceeds the upper limit and the lower limit. Is displayed. The injection amount control means (96, 98) is operated based on the displays of the upper limit exceeded display means (104) and the lower limit exceeded display means (106), and as a result, the actual injected amount is returned within the range of the upper limit and the lower limit.

In the injection amount control method by the high-pressure liquid injection vehicle (10) according to claim 5, the upper limit excess display means (104) and the lower limit excess display means (106) are such that the actual injection amount exceeds the upper limit and the lower limit. Is displayed by blinking to increase the visibility for the operator.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 8 is a perspective view of the high pressure liquid injection vehicle 10. Dolly 12
Is equipped with one front wheel 14 as a steered wheel in the center of the front part in the left-right direction, and with rear wheels 16 as drive wheels on the left and right of the rear part. At the top of the dolly 12, the driver's seat
An injection liquid tank 20, and a mechanical section 22 are provided. The driver's seat 18 is provided with a steering wheel 24, a display / operation unit 26, and a fuel gauge 28 made of a transparent pipe extends vertically to the side of the injecting liquid tank 20 for injecting medicines and liquid fertilizer. The remaining amount of the injection liquid 72 (FIG. 1) in the liquid tank 20 can be visually confirmed. The nozzle tube 30 extends in the horizontal direction at the rear end of the carriage 12, and the plurality of injection nozzles 32 are oriented downward and are attached at equal intervals along the nozzle tube 30. The injection nozzle 32 is set to a height sufficiently close to the turf 34 at least when the injection liquid 72 is injected. The high-pressure liquid injection vehicle 10 runs on the turf 34 and intermittently injects the injection liquid 72 from the injection nozzle 32 to inject the injection liquid 72 into the soil 36 under the turf 34. Along with the injection of the injection liquid 72, the soil 36 is formed with a through hole 38 having a predetermined depth, and the through hole 38 functions as an air rate of the soil 36.

In FIG. 8, each symbol is defined as follows. V: traveling speed of the high-pressure liquid injection vehicle 10 (m / s) Q: flow rate of the injection liquid 72 supplied to the nozzle tube 30 (liter / m)
in) L: Spacing of the jet nozzles 32 at the left and right ends, that is, spray width (m) P: Spray pitch spacing (m)

FIG. 1 is a block diagram of a main part of a high pressure liquid injection vehicle 10. The rotation operation of the steering wheel 24 is transmitted to the front wheels 14 via the steering system 39, and changes the direction of the front wheels 14. The rotational power of the running engine 40 is transmitted to the HST 48 (hydraulic drive device) via the pulley 42, the belt 44, and the pulley 46, and the output rotation speed of the HST 48 is controlled by the shift shift lever 50 of the driver's seat 18. The rotation output of the HST 48 is transmitted to the differential device 58 via the transmission 52, the output shaft 54, and the universal shaft 56, and is distributed from the differential device 58 to the left and right rear wheels 16.

The rotational power of the pump driving engine 60 is transmitted to the drive shaft 126 of the plunger pump 68 via the pulley 62, the belt 64 and the pulley 66. Plunger pump 68
Sucks the injection liquid 72 in the injection liquid tank 20 into the suction port 142 through the suction passage 70 and intermittently discharges it to the discharge port 144. The discharge passage 74 guides the injection liquid 72 intermittently discharged from the discharge port 144 to the nozzle pipe 30, and the injection liquid 72 is injected into each injection nozzle 32.
Is discharged intermittently. The safety valve 76 opens when the liquid pressure in the discharge passage 74 becomes excessive, and returns the injection liquid 72 in the discharge passage 74 to the injection liquid tank 20 via the return passage 78.

The magnet 80 is attached at one position in the circumferential direction of the output shaft 54, and the electromagnetic pickup 82 is arranged in proximity to the magnet 80 in a non-contact manner and generates a pulse as the output shaft 54 rotates. . The magnet 83 is attached to one position in the circumferential direction of the drive shaft 126 of the plunger pump 68, and the electromagnetic pickup 84 is
The magnet 83 is disposed in close proximity to the magnet 83 in a non-contact manner, and generates a pulse as the drive shaft 126 rotates. CPU86 is battery 88
Power is received from the electromagnetic pickups 82 and 84, and the outputs of the electromagnetic pickups 82 and 84 are input. The display / operation unit 26 is provided with an actual injection amount digital display 90, a traveling speed digital display 92, and an injection pitch interval digital display 94 as a display unit in a row in the horizontal direction. The traveling speed control throttle lever 96 is disposed adjacent to the lower side of the traveling speed digital display 92, and the output of the traveling engine 40, that is, the high-pressure liquid, is increased or decreased by increasing or decreasing the throttle opening of the carburetor of the traveling engine 40. The running speed of the injection vehicle 10 is controlled. Pump drive speed control throttle lever 98
Is disposed adjacent to the lower side of the injection pitch interval digital display 94, and the output of the pump driving engine 60, that is, the drive shaft of the plunger pump 68, is adjusted by increasing or decreasing the throttle opening of the carburetor of the pump driving engine 60. Controls the rotation speed of 126. The display / operation unit 26 is further provided with an upper limit setting dial 100 and a lower limit setting dial 102 as a setting unit on the right side of the injection pitch interval digital display 94 vertically. The upper limit exceeded display lamp 104 and the lower limit exceeded display lamp 106 are arranged near the left of the upper limit setting dial 100 and the lower limit setting dial 102, respectively.

4 and 5 show the plunger pump 68 of FIG.
FIG. 3 is a structural diagram showing a section viewed from the side and from above, respectively. The crankshaft 112 has a circular crankpin portion 114 whose center is offset from the centerline of the crankshaft 112, and is rotatably attached to the case body 118 of the crankcase 116 via bearings 120 on both sides of the crankpin portion 114. It is supported. The case body 118 has its openings closed by lids 122 and 124 on both axial sides of the crankshaft 112.
The drive shaft 126 extends parallel to the crankshaft 112, and is provided with bearings 128 at two axial positions, respectively.
It is rotatably supported by the case 22 and the case body 118. The driving-side non-circular gear 130 and the driven-side non-circular gear 132 have non-circular pitch curves, and are integrally fitted in the drive shaft 126 and the crank shaft 112 in the rotational direction, and are meshed with each other.

The plunger 134 has a cross head 136 fitted on the guide 138 of the crankcase 116 and guided in the axial direction of the guide 138 at the base end side. The connecting rod 139 has a large end portion fitted to a circular crank pin portion 114 so as to be relatively rotatable in the circumferential direction, and a small end portion thereof is connected to a cross head 136 via a cross pin 137.

The manifold 140 is joined to the crankcase 116, has a suction port 142 on the lower surface side, and has a discharge port 144 on the upper end surface. Pump chamber 146 is a manifold
It is formed in 140 and communicates with the suction port 142 and the discharge port 144. The suction valve 148 is incorporated between the suction port 142 and the pump chamber 146, is prevented from coming out of the manifold 140 by the plug 150, and prevents the reverse flow of water from the pump chamber 146 to the suction port 142. The discharge valve 152 is incorporated between the pump chamber 146 and the discharge port 144, is prevented from coming off the manifold 140 by the plug 154, and prevents the reverse flow of water from the discharge port 144 to the pump chamber 146. The seal retainers 155 and 156 are fitted and inserted into the joint portion between the crankcase 116 and the manifold 140, and the collars 157 are interposed on the inner peripheral sides on both sides in the axial direction to retain the oil seals 158 and 160. It prevents the lubricating oil therein from leaking out through the periphery of the plunger 134. The V-packing 162 is pressed by the seal holders 155 and 156 against the stepped portion of the manifold 140, swells in the radial direction, and slidably contacts the peripheral portion of the plunger 134 on the inner peripheral side,
Holds the seal of the pump chamber 146. Here, the space formed by the oil seal 158 and the crosshead 136 is communicated with the inside of the crankcase 116 by a notch or a through hole (not shown) formed in the crosshead 136, and the lubricating oil should be contained therein. There is no.

FIG. 6 is a drive mechanism diagram of the plunger 134. The plunger 134 is connected to the crank pin portion 114 of the crank shaft 112 via the connecting rod 139, and
With the rotation of 112, in one half rotation of the crankshaft 112, the suction stroke occurs, and the volume of the pump chamber 146 decreases,
The other half rotation of the crankshaft 112 is in the discharge stroke, increasing the volume of the pump chamber 146, which is similar to the conventional plunger pump. In this plunger pump 68, rotation from a prime mover such as an engine is input to the drive shaft 126, and the drive-side non-circular gear 130 and the driven-side non-circular gear 1
It is transmitted to the crankshaft 112 via 32. The design and manufacture of the pitch curves of the driving-side non-circular gear 130 and the driven-side non-circular gear 132 are described, for example, in Mechanical Design Vol. 29, No. 11 (1985).
September 2013 issue) Page 13 to 18 "Design and manufacture of non-circular gears and their applications (Author: Mr. Takashi Yamazaki, Nagaoka Gear Manufacturing Co., Ltd.)" Then, the rotation amount of the drive shaft 126 in the half rotation of the crankshaft 112 in the discharge stroke is smaller than the rotation amount of the drive shaft 126 in the half rotation of the crankshaft 112 in the suction stroke. Drive side non-circular gear to rotate faster than half rotation of suction stroke
The pitch curves of 130 and driven-side non-circular gear 132 are set.

FIG. 7 is a graph in which the horizontal axis represents the rotation angle of the drive shaft 126 and the vertical axis represents the displacement of the plunger 134 and the ratio of the rotation speed of the crankshaft 112 to the rotation speed of the drive shaft 126. As a result of setting the pitch curves of the driving side non-circular gear 130 and the driven side non-circular gear 132 as shown in FIG. 6, the rotation angle range of the drive shaft 126 corresponding to the discharge stroke and the suction stroke is 18
It is greatly changed from 0 °, for example, 90 ° and 270 °, respectively. This allows the crankshaft 112
With respect to the above, the rotation speed in the discharge stroke is significantly higher than the rotation speed in the suction stroke, the moving speed of the plunger 134 in the discharge stroke is greatly increased, and the pump chamber 14 in the discharge stroke is increased.
The decreasing rate of the volume of 6 increases, and the discharge pressure of the water intermittently discharged from the discharge port 144 increases.

A method of controlling the injection amount by the high pressure liquid injection vehicle 10 will be described. The operator (= driver) gets in the driver's seat 18 and displays the actual injection amount digital display 90 on the display / operation unit 26.
The high pressure liquid injection vehicle 10 is driven while watching the display such as. The left and right rear wheels 16 are rotationally driven by the rotational power transmitted from the traveling engine 40 to drive the high-pressure liquid injection vehicle 10. The plunger pump 68 is driven by the rotational power from the pump driving engine 60 to intermittently discharge the injection liquid 72 to the discharge port 144, and the injection liquid 72 intermittently discharged from the discharge port 144 passes through the discharge passage 74. It is supplied to each spray nozzle 32, sprayed from the spray nozzle 32, and poured into the soil 36.

The electromagnetic pickup 82 produces one pulse for each revolution of the output shaft 54. Assuming that the number of pulses generated by the electromagnetic pickup 82 per minute is n1, the traveling speed V
Is proportional to n1. The electromagnetic pickup 84 generates one pulse for each rotation of the drive shaft 126 of the plunger pump 68. When the number of pulses generated by the electromagnetic pickup 84 per minute is n2, the discharge amount Q of the injection liquid 72 of the plunger pump 68 per minute is proportional to n2. The actual injection amount q (liter / m ^ 2) per 1 m ^ 2 is expressed by the following equation. q = (0167 · Q) / (L · V) If the diameter and stroke of the plunger 134 are d and S, respectively, Q and V are expressed by the following equations. Q = π · d ^ 2 · S · n2 / 4 V = π · D · n1 / 60 Therefore, q is proportional to n2 / n1. P is represented by the following equation. P = 60 · V / n2 = π · D · n1 / n2 ∴P is proportional to n1 / n2. Therefore, n1, n2
It is possible to calculate and display V, q, P and Q by counting.
Actual injection amount digital display 90, running speed digital display
92 and the injection pitch interval digital display 94 display q, V, and P, respectively.

On the other hand, an appropriate injection amount of the injection liquid 72 per 1 m ^ 2 is determined as a set injection amount, and an appropriately large value and a small value with respect to this set injection amount are set as upper and lower limits of the actual injection amount, respectively. It is set by the upper limit setting dial 100 and the lower limit setting dial 102. When the actual injection amount q is larger than the upper limit, the upper limit excess display lamp 104 is constantly turned on or blinking, and when the actual injection amount q is smaller than the lower limit, the lower limit excess display lamp 106 is constantly turned on or blinking.

The worker (= driver of the high-pressure liquid injection vehicle 10) is
When the travel speed control throttle lever 96 and / or the pump drive speed control throttle lever 98 are operated and the upper limit excess lamp 104 is constantly lit or blinking, the rotation speed of the travel engine 40, that is, high pressure. The running speed of the liquid injection vehicle 10 is increased and / or the rotation speed of the pump driving engine 60, that is, the driving speed of the plunger pump 68 is decreased to increase P, and the actual injection amount q is returned to the upper limit or less. Further, when the lower limit exceeded indicator lamp 106 is constantly lit or blinking, the rotation speed of the traveling engine 40, that is, the traveling speed of the high pressure liquid injection vehicle 10 is reduced, and / or the rotation of the pump driving engine 60 is reduced. The speed, that is, the driving speed of the plunger pump 68 is increased to decrease P, and the actual injection amount q is returned to the lower limit or more. The travel speed control throttle lever 96 and the pump drive speed control throttle lever 98 are arranged immediately below the travel speed digital display 92 and the injection pitch interval digital display 94, respectively. When changing P, V
It is possible to accurately operate the traveling speed control throttle lever 96 and the pump drive speed control throttle lever 98 below the traveling speed digital display 92 and the injection pitch interval digital display 94 displaying P and P, and The V and P changed with the operation of the travel speed control throttle lever 96 and the pump drive speed control throttle lever 98 are immediately displayed on the travel speed digital display 92 and the injection pitch interval digital display 94.

FIG. 2 is a partial front view of a modified example of the display / operation unit 26. In the display / operation unit 26, the upper limit exceeded display lamp 104 and the lower limit exceeded display lamp 106 are arranged above and below the actual injection amount digital display 90, respectively. Since the upper limit exceeded display lamp 104 and the lower limit exceeded display lamp 106 are respectively arranged above and below the actual injection amount digital display 90,
The operator recognizes that the actual injection amount q is larger than the upper limit when the upper limit excess display lamp 104 on the actual injection amount digital display 90 is constantly lit or blinking, and When the lower limit exceeded indicator lamp 106 under the actual injection amount digital display 90 is constantly lit or blinking, it is recognized that the actual injection amount q is smaller than the lower limit. The states above the upper limit and below the lower limit are displayed above and below the actual injection volume digital display 90, respectively, so that the operator can easily recognize the state.

FIG. 3 is a partial front view of still another modification of the display / operation unit 26. In this display / operation unit 26, two actual injection amount digital indicators 90 are provided, and the actual injection amount digital indicator 90, the set injection amount digital indicator 108, and the actual injection amount digital indicator 90 are arranged in a line in the vertical direction. Are arranged in. The set injection amount digital display 108 displays the set injection amount set by a setting dial (not shown). When the actual injection amount q is larger than the upper limit and smaller than the lower limit based on the set injection amount displayed on the set injection amount digital display 108, the upper side of the set injection amount digital display 108 And the actual injection amount digital display 90 on the lower side constantly displays or blinks the actual injection amount q. When the actual injection amount q is between the upper limit and the lower limit based on the set injection amount, the actual injection amount q is not displayed together with the upper and lower actual injection amount digital indicators 90 and the set injection amount is set to the set injection amount digital. It is only displayed on the display unit 108. Also in the display / operation unit 26, states larger than the upper limit and smaller than the lower limit are displayed above and below the actual injection amount digital display 90, respectively, so that the operator can easily recognize the state.

In the embodiment, the set injection amount per 1 m ^ 2 is set and the actual injection amount per 1 m ^ 2 is displayed. However, the set injection amount and the actual injection amount per other predetermined area are set. And may be displayed.

[0033]

According to the present invention, the actual injection amount is displayed on the actual injection amount display means, and the injection amount control means is operated based on this display to change the actual injection amount. Therefore, the following effects are obtained. (A) The actual injection amount can be adjusted to the set injection amount efficiently and accurately. (B) Since the injection amount at each place is appropriate, depending on the place,
It may cause chemical damage, the injection effect may be insufficient,
It is possible to avoid performing the injection work again for correction. (C) As a result of the injection liquid being properly injected, it is possible to prevent a situation where the injection liquid becomes insufficient or a large amount remains.

According to the second aspect of the present invention, since the traveling speed display means and the traveling speed control means are arranged in a positional relationship with each other, the traveling speed control means can be properly operated without error.

According to the third aspect of the present invention, the injection pitch interval display means and the reciprocating pump drive speed control means are arranged in a positional relationship, so that the reciprocating pump drive speed control means can be operated properly without error. it can.

According to the fourth aspect of the present invention, since the fact that the actual injection amount exceeds the upper limit and the lower limit is displayed by the upper limit excess display means and the lower limit excess display means, the operator can precisely control the injection amount.

In the invention of claim 5, since the upper limit exceeded display means and the lower limit exceeded display means blink to indicate the excess, the worker can more accurately judge the actual upper limit exceeded and the lower limit exceeded. it can.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a main part of a high-pressure liquid injection vehicle.

FIG. 2 is a partial front view of a modified example of the display / operation unit.

FIG. 3 is a partial front view of still another modified example of the display / operation unit.

FIG. 4 is a structural diagram showing a cross section of the plunger pump of FIG. 1 as viewed from the side.

5 is a structural diagram showing the plunger pump of FIG. 1 in a cross section as seen from above. FIG.

FIG. 6 is a drive mechanism diagram of a plunger.

FIG. 7 is a 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 crank shaft to the rotation speed of the drive shaft.

FIG. 8 is a perspective view of a high pressure liquid injection vehicle.

[Explanation of symbols]

10 High-pressure liquid injection vehicle 32 Injection nozzle 34 Turf (ground) 36 Soil 68 Plunger pump (reciprocating pump) 72 Injection liquid 82 Electromagnetic pickup (travel speed detection means) 84 Electromagnetic pickup (pump drive speed detection means) 90 Actual injection amount digital display Device (actual injection amount display means) 92 Travel speed digital display (travel speed display means) 94 Injection pitch interval digital display (injection pitch interval display means) 96 Travel speed control throttle lever (travel speed control means, injection amount control) 98) Pump drive speed control throttle lever (reciprocating pump drive speed control means, injection amount control means) 104 Upper limit exceeded display lamp (upper limit exceeded display means) 106 Lower limit exceeded display lamp (lower limit exceeded display means)

Claims (5)

[Claims] 1. A reciprocating pump (68) for intermittently discharging an injecting liquid (72), said reciprocating pump being arranged in one row in the horizontal direction.
A plurality of injection nozzles that intermittently inject the injection liquid (72) sent from (68) to the ground (34) and inject it into the soil (36).
(32), traveling speed detecting means (82) for detecting traveling speed, pump drive speed detecting means (84) for detecting drive speed of the reciprocating pump (68), and traveling speed detecting means (82) and the pump Equipped with an actual injection amount display means (90) for displaying the actual injection amount per constant area calculated based on the detection value of the drive speed detection means (84), the display value of the actual injection amount display means (90) is An injection amount control method using a high-pressure liquid injection vehicle, characterized in that the actual injection amount is increased or decreased by the injection amount control means (96, 98) so that the set injection amount is achieved. 2. The injection amount control means (96) is a traveling speed control means (96) for controlling a traveling speed, and a traveling speed display means for displaying the traveling speed detected by the traveling speed detecting means (82). 2. The injection amount control method for a high-pressure liquid injection vehicle according to claim 1, wherein the (92) and the traveling speed control means (96) are arranged in positional relationship with each other. 3. The injection amount control means (98) is a reciprocating pump drive speed control means (98) for controlling the drive speed of the reciprocating pump (68), the traveling speed detecting means (82) and the pump. Injection pitch interval display means (94) for displaying the injection pitch interval calculated based on the detection value of the drive speed detection means (84)
The method for controlling an injection amount by a high-pressure liquid injection vehicle according to claim 1, characterized in that the reciprocating pump drive speed control means (98) is arranged in positional relationship with each other. 4. An upper limit exceeded display means (104) and a lower limit exceeded display means (106) for displaying that the actual injection amount displayed on the actual injection amount display means (90) exceeds the upper limit and the lower limit. And the injection amount control means (96, 9) based on the display of the upper limit excess display means (104) and the lower limit excess display means (106).
8. The step 8) is operated so that the display value of the actual injection amount display means (90) becomes the set injection amount.
An injection amount control method using the high-pressure liquid injection vehicle according to any one of 3 to 3. 5. The injection amount control by the high-pressure liquid injection vehicle according to claim 4, wherein the upper limit excess display means (104) and the lower limit excess display means (106) display the upper limit and the lower limit in excess by blinking. Method.