KR100463707B1 - The spraying control device of a spraying work vehicle - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scattering control device for a spreading work vehicle. When the spreading work is carried out on a farm with many ups and downs on a spreading work vehicle, it is necessary to frequently change the accelerator setting position, the traveling speed, and the traveling direction, and according to these operations. It is to solve the problem that it is difficult to properly manipulate the spray amount, the spray timing, and the like of the potion. Accordingly, the present invention includes a variable flow rate control valve 3 and a pressure sensor 4 in the potion supply paths L1 and L2 of the spreading work vehicle 10, and also in the control unit. And a vehicle speed sensor 7 on the axle. In the controller 8, the opening degree of the variable flow rate control valve 3 is maintained in accordance with the detected values of the vehicle speed sensor 7 and the pressure sensor 4 so as to maintain the dispersion amount set by the setter 6. Adjust the intensity. Further, when the pump P is driven to detect the speed of the vehicle speed sensor 7 at a speed higher than or equal to a predetermined speed, and the flow sensor 5 does not detect a predetermined flow rate. The adjustment of the opening degree of the control valve 3 is temporarily suspended.

Description

The spraying control device of a spraying work vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spreading work vehicle for dispensing a potion in a farm or the like, and more particularly to a configuration of a spreading control device configured to perform a spreading work accurately and simply.

Conventionally, in a spreading operation vehicle for dispensing a potion in a farm or the like, a potion tank, a potion spray boom, a pump for supplying a potion to the potion spray boom from the potion tank, and a potion for connecting the potion tank and the spray boom A supply path is provided, and it is known to perform a spraying operation, in particular, to start and stop spraying by opening / closing a cock and an ON / OFF operation of a switch provided in the potion supply path.

However, when the spreading work car is used in a farm with a lot of ups and downs or in a narrow paddy field where the accelerator setting position, traveling speed, or direction of movement is frequently changed, it is necessary to appropriately control the spray amount and the spray timing of the potion accordingly. There is a problem that these operations are difficult for the conventional spreading work vehicle.

Therefore, an object of the present invention is to provide a uniform distribution by performing a distribution of a potion by a dispersion work vehicle under the control of a controller.

1 is a schematic diagram showing a connection state between a controller and a potion supply passage.

2 is a side view of the distribution work vehicle.

3 is a plan view of the distribution work vehicle.

4 is a partial perspective view of the potion tank.

5 is a partial perspective view of the potion tank when the operation panel is installed.

6 is a front view of the switch plate.

7 is a view showing a power transmission mechanism of a distribution work vehicle.

8 is a flowchart showing processing of the controller.

9 is a flowchart showing an outline of the distribution control.

※ Explanation of Major Drawings

P ... pump

Ch ... Electronic Clutch

1 ... Potion Tank

2 ... dispersion boom

3 ... variable flow control valve

4 ... pressure sensor

5 ... flow sensor

6 ... Flow Setter

7. Vehicle speed sensor

8 ... controller

9 ... Cork

91 ... cock opening lever

10 ... Scatter Truck

29 ... switch panel

38 ... operation box

For this reason, this invention took the following technical means.

That is, according to the present invention, a pump driven by the potion tank 1, the potion spray boom 2, and the engine E, and supplies the potion to the potion spray boom 2 from the potion tank 1. (P) and a spray control apparatus for a spraying work vehicle having a potion supply path (L) for connecting the potion tank (1) and the potion spray boom (2), wherein the sprayer is sprayed from the potion spray boom (2). A spray control device (C) is provided to control the amount of the potion, and the spread control device (C) includes a variable flow rate control valve (3) installed in the potion supply path (L), and the pressure of the adjusted potion. And a vehicle speed sensor 7 for detecting a traveling speed, and a pressure sensor 4 for detecting the oil pressure, a setter 6 for setting the amount of dispersion installed in the spreading work vehicle, and a vehicle speed sensor 7 for detecting a traveling speed. And the opening degree of the variable flow control valve 3 is maintained to maintain the dispersion amount set by the setter 6 based on the detected value of the pressure sensor 4. The controller 8 to adjust is provided.

In addition, according to the present invention, a flow rate sensor (5) for detecting the flow rate of the potion is provided in the potion supply path (L), and arbitrarily opens and closes the potion sprayed from the spray boom (2) to the operation part of the spraying work vehicle. And a coke operating unit 91 capable of being installed, and in the state where the pump P is driven and the detected vehicle speed of the vehicle speed sensor 7 detects a speed equal to or greater than a predetermined speed in the controller 8. When the flow rate sensor 5 does not detect a predetermined flow rate, a control stop function is provided to stop the opening degree control of the variable flow rate control valve 3.

According to the present invention, in the controller 8, when the detected vehicle speed of the vehicle speed sensor 7 does not reach a predetermined speed, the opening degree of the variable flow control valve 3 is kept slightly open. It is equipped with a control stop function that does not adjust the opening degree.

In addition, according to the present invention, when constructing the dispersion control device (C) for controlling the amount of the sprayed water sprayed from the potion spray boom 2, the recessed portion in the potion tank (1) located next to the driver's seat (14) The setter 6 and the setter which form a dispersion amount on the surface of the cover member 28 by providing a cover member 28 which forms the 25 and blocks the recess 25. A liquid crystal display unit 27 for displaying the setting state of (6) is provided, and a controller 8 for connecting the setter 6 and the liquid crystal display unit 27 is provided inside the cover member 28. have.

Example

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described based on drawing.

As shown in Figs. 2 and 3, the distribution work vehicle 10 is provided with an axle housing 12F for supporting the front wheels 11F in the front part of the vehicle body, and rear wheel 11R in the rear part of the vehicle body. The axle housing 12R for supporting) is provided, and the front and rear wheels 11F and 11R can be steered left and right by the steering handle 13 to 4WS.

Further, an accelerator lever 22 for setting and maintaining the output rotation of the engine E is provided below the steering wheel 13, and the output rotation of the engine E is increased only when stepping on the floor. An accelerator pedal 23 is provided.

In addition, the spray work vehicle 10 is equipped with a potion tank 1 formed to surround both sides of the left and right from the rear of the driver's seat 14, and the potion is provided by a pump P installed below the driver's seat 14. The potion in the tank 1 is pumped to the spray boom 2 in the front part of the vehicle body.

In addition, left and right sides of the bonnet 24 are provided with a pair of left and right link attachment support 15, and each support 15 has an upper link 16u and a lower link ( 16l) and the boom attachment support 17 in which the said spread boom 2 was installed are connected, and the parallel link mechanism 18 is comprised.

In addition, an electric motor 19 for lifting and lowering the boom is provided at the center of the support 17 for attaching the boom, and the height of the entire distribution boom 2 is adjusted up and down by driving the electric motor 19. . Further, electric motors 20 and 20 for boom extension are installed on left and right sides of the support 17 for attaching the boom, and the distribution boom 2 is left and right by driving the electric motors 20 and 20. The structure is expanded to a working posture or a storage posture along the vehicle body side.

The spreading boom 2 further includes a center boom 2a which is directly installed at the support 17 for attaching the boom, and a side boom which is foldable to the left and right outer sides of the center boom 2a. booms 2b and 2b, and spray nozzles 21... are arranged in these booms 2a, 2b and 2c at regular intervals, respectively.

In addition, as shown in FIG. 4, the potion tank 1 has a recess 25 formed on the right side of the driver's seat 14, surrounded by a bottom surface, a rear surface, and an outer surface of the vehicle body, and having an upper portion and an inner portion of the vehicle body open. At the same time, an attachment seat 26 to which a rubber hose constituting a part of the potion supply path L is fixed is provided below the front face of the recess 25. As shown in FIG. 5, a box-shaped cover member (hereinafter referred to as the operation box 28) is fitted and fixed to cover the upper, front and inner opening surfaces of the recess 25. The liquid crystal display part 27, the spread amount setting device 6, etc. are provided in the surface of the operation box 28. As shown in FIG. Moreover, since the said operation box 28 is located in the side of the driver's seat 14, as shown in FIG. 3, it can be used also as an armrest part.

In addition, a variable flow rate control valve 3 or a cock 9 provided in the potion supply path L is incorporated in the operation box 28 to restrict the potion supply path L such as the rubber hose. It is.

Here, the said operation box 28 is demonstrated based on FIG. The operation box 28 is formed with the inclined surface of the front portion and the horizontal surface of the rear portion, the boom lifting switch 30 for operating the electric cylinder 19 for lifting the boom on the inclined surface of the front portion, the boom extension of each of the left and right Operation switches 31 and 31 for operating the electric cylinder 20 for power are provided, and a switch panel 29 having a liquid crystal display portion 27 is provided in the middle of the inclined surface.

In addition, the pump ON / OFF switch 30 or the center boom 2a provided with a pilot lamp 39 for inserting or breaking the electromagnetic clutch Ch of the pump P on the horizontal surface of the rear part. ) And a cock operating part (hereinafter, cock opening / closing levers 9l, 9l, 9l) for opening and closing the cock 9 provided in the potion supply path L communicating with the right and left booms 2b and 2b. .

In addition, as shown in FIG. 6, the switch panel 29 is provided with a display switching switch 33 for switching the display of the liquid crystal display unit 27. This displays the current "spread set amount", "pressure", "flow rate" per unit time, and "accumulation" of the used spread amount until the reset switch 36 is pressed. It becomes the structure to say. And below the liquid crystal display part 27, the automatic switch 34 which turns ON / OFF the dispersion | distribution control mentioned later, and the dispersion | distribution which selects the predetermined nozzle preset at the time of factory shipment etc. when the said automatic switch 34 is ON. A setting switch 35 and a spreading setter 6 (spreading amount increasing switch 6A, spreading amount reducing switch 6B) for fine-adjusting "pressure" and "flow rate" during automatic control are provided. It is.

In addition, the said specification nozzle is a structure which selects the specification nozzle of 100L, 75L, 50L, and 25L in order of 1R in order.

In the switch panel 29 configured as described above, when the automatic switch 34 is turned on after the engine E is started, the pilot lamp 37 lights up and dispersion control is started.

When the prescribed nozzle is selected by pressing the dispersion setting switch 35 and left for 2 seconds, the setting of the nozzle 21 used for the dispersion is set in the memory of the controller 8.

In addition, when the nozzle 21 is not a prescribed nozzle, a special operation is performed. Here, the engine key switch of the scattering work vehicle 10 is turned from OFF to ON (when not started, but all the circuits are energized) while the distribution setting switch 35 is pressed with the left hand. Next, the display switching switch 33 is pressed to move the triangle mark 38 to the "scattering setting" position. As a result, the controller 8 enters the adjustment mode in which the nozzle 21 can be set independently, and the driver presses the dispersion amount increase / decrease switch 6A or 6B while pressing the numerical value displayed on the liquid crystal display 27. The setting value is set, and the automatic switch 34 is finally set in the memory by continuously pressing the switch for about 1 second.

On the other hand, during operation, each time the display switching switch 33 is turned on, the triangular mark 38 at the corner of the display portion is sequentially moved to display the current "spread set amount", "pressure", "flow rate", "accumulation". Display one of the items.

Further, a dispersion controller 8 is provided on the rear surface of the inclined surface in front of the operation box 28, and various setting devices 6A, 6B, 34, etc. on the liquid crystal display unit 27 or the switch panel 29 are provided. And actuators such as the boom elevating electric motor 19 and the boom expanding electric motors 20 and 20 by inputting detection values such as the pressure sensor 4 and the flow sensor 5 related to the dispersion. It is configured to output a driving command.

As described above, the driver can set the spread amount at the armrest portion, i.e., where the hand touches, and for example, the spread amount setting operation is easier than the configuration in which the setter or the liquid crystal display is installed on the meter panel in front of the handle and the arm is extended and operated. . Moreover, since the controller 8 which connects the setter 6 and the liquid crystal display part 27 is provided in the inside of the operation box 28, the apparatus 8, 6, 27, 34 which are related to dispersion control. Not only can be arranged intensively in a small space, but also maintenance of these devices is easy.

Next, based on FIG. 7, the power transmission structure of the distribution work vehicle 10 is demonstrated.

The power from the engine E is transmitted to the gear in the gear case 46 in the front part of the vehicle body via the V belt 45, and the rotation speed proportional to the rotation speed of the engine E is transmitted from the gear. It is configured to transmit power through the first drive shaft 47 and drive the first PTO shaft 48 at the rear of the vehicle body, while transmitting power to the transmission mechanism 53 installed in the mission case 49. have. The drive shaft 47 that transmits power to the first PTO shaft 48 is configured to drive the input shaft of the pump P via the V belt 52 and the electromagnetic clutch Ch.

In addition, the power output from the transmission mechanism 53 is transmitted to the front and rear wheels 11F and 11R through the second drive shaft 50, and at the same time, to transmit power to a work machine, for example, a rotary tiller, connected to the rear of the vehicle body. 2 is configured to drive the PTO shaft 51. Moreover, the said 2nd drive shaft 50 is equipped with the sensor which detects coaxial rotation (henceforth a vehicle speed sensor 7), and it is set as the structure which detects the traveling speed of a vehicle.

Next, the potion supply path L from the potion tank 1 to the spray nozzle 21 of the spray boom 2 will be described based on FIG. 1.

The potion in the potion tank (1) is first introduced into the pump (P) through the first supply path (L1), the configuration is sent to the second supply path (L2) by the drive of the pump (P). It is. In the second supply path L2, two potion return paths (first return path 55a and second return path 55b) for returning the potion to the potion tank 1 are provided. 55a is configured to return the potion directly to the tank 1.

Thereby, the aqueous solution in the potion tank 1 is always stirred, and the deviation of the potion concentration can be prevented.

In addition, a safety valve 56 is provided in the second return passage 55b to maintain the internal pressure of the second supply passage 55b at a predetermined pressure (here, 30 kg / cm ² ) or less.

A downstream variable flow rate control valve 3 is installed downstream of the second supply path L2, and the internal motor 58 is driven by an energization command of the controller 8 to open the flow path. Is controlled to deliver the potion to the third supply path L3.

The third supply passage L3 is provided with a pressure sensor 4 for detecting the pressure in the third supply passage, and a flow sensor 5 for detecting the flow rate in the third supply passage. ) Is configured to output.

Further, a branch valve 57 is provided downstream of the third supply path L3, and a potion is injected from the branch valve 57 to the center boom 2a and the left and right side booms 2b and 2b, respectively. It is a structure which sends out.

In the drawing, reference numeral 9... Indicates a cock for each boom, and is configured to open and close the cock by operating the cock opening / closing lever 9l...

In the distribution work vehicle 10 configured as described above, the distribution control is performed as in the flowcharts shown in FIGS. 8 and 9.

8 is a flow chart showing the process of the controller 8 as a whole. At first, the driver waits for the driver's engine key switch operation. When the key switch is turned ON, the flow chart is energized and the engine E ) Is started. Then, the controller 8 reads the connection state or setting state of various sensors and setters (STEP 2), and drives the motor 58 of the variable flow control valve 3 to open the valve opening degree. (50 to 70%), and waiting (STEP 3) to perform scattering control or other control.

Further, in the distribution control, as shown in Fig. 9, first, in STEP 1, it is determined whether the automatic switch 34 is ON or not, and if this is YES, the pilot lamp 37 is turned on and the process of STEP 3 or lower is performed. do.

In the process of STEP 3, it is determined whether or not the vehicle speed is equal to or greater than a predetermined value, that is, equal to or greater than the speed (0.2 m / sec) assumed in the work. If this is YES, the electromagnetic clutch Ch is turned ON to drive the pump P, and the pilot lamp 39 of the pump P is turned on (STEP 7 to 8).

On the other hand, when the vehicle speed is less than the predetermined value, the flow proceeds to STEP 4, the energization of the variable flow control valve to the internal motor 58 is temporarily suspended and maintained with a predetermined amount of opening, and the electromagnetic clutch Ch To OFF to stop the pump (P). As a result, it is possible to prevent the paper from being scattered by being concentrated locally so as to generate excessively high concentration of paper, and to raise the vehicle speed again, thereby to achieve a uniform dispersion state as set immediately.

Further, in the processes of the above steps 9 to 12, the vehicle speed is detected, the dispersion pressure P1 corresponding to the vehicle speed is calculated, and the actual pressure value P2 is read. Subsequently, the flow rate value is also read, and it is determined in STEP 13 whether the flow rate F is equal to or less than a predetermined amount (1 liter / minute), that is, whether the driver has stopped the coke (9 ... Thus, if this is the determination of YES, that is, if the driver intentionally blocks the cock 9, the opening degree of the variable flow control valve 3 is not adjusted (STEP 15).

At this time, since the safety valve 56 is set in the second potion supply path L2, the potion is recovered to the potion tank 1 through the first return path 55a while maintaining a constant pressure. .

On the other hand, in the case where the judgment of STEP 13 is NO, the pressure P1 of the calculated value and the actual pressure P2 are compared, and the valve opening degree of the variable flow control valve 3 is adjusted in STEP 15 so as to coincide with this. Drive motor 58 to adjust.

As described above, in the spreading work vehicle 10, the flow rate sensor 5 is predetermined when the pump P is driven and the vehicle speed sensor 7 detects a traveling speed of a predetermined speed or more. When the flow rate is not detected, for example, at the end of the farm, it is assumed that the driver is turning without lowering the speed while closing the cock 9, and the flow rate decreases if it is intact. Although the detection value of (4) changes and it is a situation which the opening-closing adjustment of the variable flow control valve 3 is performed, in this case, it is the structure which interrupts the said adjustment process.

As a result, when the driver opens the cock 9 again, spraying starts immediately in the same state as before, so that the time taken to adjust the opening degree of the variable flow rate control valve is shortened, and the dispersion (no) in the farm is eliminated. Scattering areas) rarely occur.

In addition, since the opening degree of the flow path of the variable flow control valve 3 is operated to a predetermined value with a high frequency of use after the engine E is started, the electromagnetic clutch Ch is inserted even when the spreading work vehicle 10 suddenly starts. Only the dispersion is started, and as described above, the time taken to adjust the opening degree of the variable flow rate control valve 3 is shortened, so that the dispersion (no spread region) in the farm is hardly generated.

On the other hand, in the above embodiment, the spray work vehicle 10 is a so-called boom sprayer, but the spray tractor may be equipped with a potion tank or a spray boom and the spray control device of the present invention, and a spray work for managing a golf course or the like. The dispersion control device may be mounted on a vehicle.

According to the present invention configured as described above, after the driver sets the dispersion amount by the setter 6, even if the driving speed of the pump P is changed or the running speed is changed by changing the engine speed, Since the flow rate is adjusted by the controller 8 and the dispersion amount as set is maintained, the driver's operation can be reduced, and the uniform dispersion operation can be performed as compared with the conventional dispersion operation vehicle.

Further, according to the present invention, since the opening degree of the variable flow rate control valve 3 is adjusted by the controller 8 in accordance with the pressure of the potion and the vehicle speed, the dispersion amount as set is maintained. Uniform spreading work is possible compared to cars.

Further, according to the present invention, when the vehicle speed sensor 7 detects a traveling speed of a predetermined speed or more (for example, 0.2 m / s or more) that is assumed during work, the flow rate sensor despite the pump P being driven. When the detected value of (5) does not reach a predetermined flow rate, the adjustment of the opening degree of the variable flow rate control valve 3 is suspended temporarily. This is assumed, for example, when the spreading work vehicle reaches the end of the farm, and the driver turns the coke operation unit 91 without stopping the spraying while stopping the spraying of the potion. Priority is given to suspending adjustment of the opening degree of the variable flow control valve 3.

For this reason, even though the pressure of the potion changes, the opening degree of the variable flow rate control valve 3 remains the same. Therefore, if the driver starts spraying by operating the cock operating portion 9l again, the variable flow rate control valve ( Since the adjustment time of the opening degree of 3) is shortened, there is no case that the dispersion is delayed and no dispersion region is generated.

According to the present invention, when the vehicle speed sensor 7 detects a situation in which the predetermined traveling speed has not reached (for example, 0.2 m / s or less), the opening degree of the variable flow control valve 3 is not set to zero. The flow rate of the variable flow rate control valve 3 is kept open by a predetermined amount (opening degree assumed to be high in frequency) without stopping the adjustment of the opening degree.

For this reason, the internal pressure of the potion supply path downstream of the variable flow control valve 3 is maintained to some extent, and even if the dispersion work vehicle stops once and starts running again, the amount of adjustment of the variable flow control valve 3 is small. As in the invention, since the adjustment time of the opening degree of the control valve 3 is shortened, there is no case where the dispersion is delayed and no dispersion region is generated.

Further, according to the present invention, the setter 6 or the liquid crystal display unit 27 is formed on the surface of the cover member 28 which blocks the recess 25 by using the recess 25 formed in the potion tank 1. Since the driver is installed, the driver can quickly set the amount of dispersion in the armrest portion, that is, the place where the hand touches. For example, the scattering amount setting operation can be performed quickly and simply as compared with the configuration in which the setting device or the liquid crystal display unit is installed on the meter panel in front of the handle and the arm is extended. Furthermore, since the controller 8 for connecting the setter 6 or the liquid crystal display unit 27 is provided inside the cover member 28, the apparatus related to the dispersion control can be concentrated in a small space. In addition, maintenance of these devices is easy.

Claims (4)

delete Potion tank (1), Potion spray boom (2), A pump P driven by the engine E and supplying a potion to the potion spray boom 2 from the potion tank 1, A potion supply passage (L) for connecting the potion tank (1) and the potion spray boom (2), Dispersion control device (C) for controlling the amount of the potion sprayed from the potion spray boom 2, The dispersion control device (C) includes a variable flow rate control valve (3) installed in the potion supply path (L), a pressure sensor (4) for detecting the pressure of the adjusted potion, and a dispersion work vehicle. A setter 6 for setting a dispersion amount and a vehicle speed sensor 7 for detecting a traveling speed, A controller 8 for adjusting the opening degree of the variable flow rate control valve 3 to maintain the dispersion amount set by the setter 6 based on the detected values of the vehicle speed sensor 7 and the pressure sensor 4 In the scattering control device of a scattering work vehicle having a, The potion spreading boom 2 is provided with a plurality of booms 2a, 2b, 2c, In the potion supply path L, a flow rate sensor 5 for detecting the flow rate of the potion is provided, and the potion sprayed from the spray booms 2a, 2b, and 2c is arbitrarily opened and closed on the control unit of the spreading work vehicle. Coke control units 91, 9l and 9l are installed in each boom 2a, 2b and 2c so that In the controller 8, the coke operating units 9l, 9l, 9l are operated while the pump P is driven and in a state where the detected vehicle speed of the vehicle speed sensor 7 detects a speed equal to or greater than a predetermined speed. When the flow rate sensor 5 does not detect a predetermined flow rate as a result of being fully closed, it has a control stop function for stopping the adjustment of the opening degree of the variable flow rate control valve 3. Scatter Control. delete The method of claim 2, A recess 25 is formed in the potion tank 1 located next to the driver's seat 14, and a cover member 28 for blocking the recess 25 is provided. In the cover member 28, a setter 6 for setting the spreading amount and a liquid crystal display 27 for displaying the set state of the setter 6 are provided. A scattering control device for a scattering work vehicle, characterized in that a controller (8) for connecting the setter (6) and the liquid crystal display unit (27) is provided inside the cover member (28).