JPH0425242Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is a set dynamic injection equipped with a power sprayer and an engine, and displays the optimum pressure and discharge amount for the rotation speed of the power sprayer. , relates to technology for improving work accuracy.

(b) Prior Art In conventional set dynamic injection, only the pressure was displayed on the pressure gauge, and the rotational speed and discharge amount of the power sprayer were not displayed. The pressure is adjusted by the setting dial, the rotation speed is adjusted by the throttle lever, and the discharge amount must be determined by considering the rotation speed, pressure, jet head, hose diameter, adjustment of the cock, etc., and the optimum values for these must be determined in the instruction manual. Or, it was set based on the operator's experience.

(c) Problems that the invention aims to solve As mentioned above, if the rotation speed and discharge amount are not displayed and the pressure and rotation speed are set based on the instructions for use,
The user's manual had to be carried at all times, and since the appropriate value varied depending on the rotational speed, adjustment was very troublesome and difficult. In addition, pressure and rotation speed change due to spraying work, irrigation work, etc.
This adjustment was difficult. When working with a value that deviates from the appropriate value, unnecessary pressure is applied or the rotational speed is too high, resulting in inefficient work.

(d) Means for solving the problem In view of the above points, the present invention is constructed as follows.

In a set dynamic injection system in which an engine 3 and a power sprayer 4 are arranged on a set table 1, a tachometer 17 is arranged on the operation panel 5, and the display section of the tachometer 17 shows the optimum efficiency pressure according to the rotation speed. and the discharge amount.

(e) Embodiments and operations The purpose of the present invention is as described above, and the structure and operations of the present invention will be explained based on the configuration of the embodiment shown in the attached drawings.

Figure 1 is an overall front view of the set dynamic jet. Figure 2 is a front view of the tachometer. FIG. 3 is a control circuit block diagram. Fourth
The figure is a graph showing the relationship between rotation speed, pressure, and discharge amount.

To explain the overall configuration in Fig. 1, an engine 3 and a power sprayer 4 are installed in a set frame 2 on a set table 1.
belt case 6 and power from the engine is placed on the belt case 6
Power is transmitted to the crankshaft of the power sprayer 4 via the inner V-belt. The power sprayer 4 reciprocates the plunger by rotating the crankshaft, sucks in the chemical liquid from the water intake port, and discharges it from the discharge port 7 or 8. The discharge ports 7 and 8 are arranged on an operation panel 5, and the operation panel 5 is provided at the upper front of the main body. Reference numeral 9 is a spillage port for draining excess water. Reference numerals 10 and 10 are movable wheels that can be moved by one person.

On the operation panel 5, in addition to the discharge ports 7 and 8 having different diameters, there are discharge tips 15 and 16 for adjusting discharge and stop of the discharge ports 7 and 8, and a pressure setting for setting the pressure according to the work. A dial 12, a pressure gauge 13 that detects and displays the pressure mechanically or with a sensor, a discharge meter 14 that detects and displays the pressure with a flow sensor, and a tachometer 17 that detects and displays the rotation of the crankshaft with a rotation speed sensor. , a throttle lever 19 for adjusting the rotation speed, an automatic/manual changeover switch 20 for switching between automatically or manually adjusting pressure, etc., which will be described later, a key switch 21, a setting dial 22 for setting the discharge amount, etc. The equipment and instruments are concentrated on the operation panel 5 for easy operation.

FIG. 2 is an enlarged view of the tachometer 17, which has a rotation speed scale 17a, a pressure scale 17b, and a discharge amount scale 17c, so that the values during efficient operation can be seen. In other words, the relationship between rotation speed, pressure, and discharge amount is as shown in Figure 4, and for an efficient relationship between rotation speed and pressure, as shown in curve a, the higher the rotation speed, the better to lower the pressure. The relationship between the number of rotations and the amount of discharge is as shown by b, and as the number of rotations is increased, the amount of discharge increases. Based on this relationship, as shown in FIG. 2, the tachometer is marked with scales (values as a guideline) that indicate the optimum value of efficiency relative to the number of revolutions. Therefore, by looking at the rotational speed meter, the optimal pressure and discharge amount can be determined, and by adjusting the values for the rotational speed with the pressure setting dial 12 and selecting the jet head and hose diameter, efficient operation can be achieved.

FIG. 3 is a block diagram for automatically setting the pressure and rotation speed when the discharge amount is set. In other words, since the jet head and hose diameter are determined by operations such as spraying and irrigation, the discharge amount can be determined. Therefore, when the discharge amount is set with the setting dial 22, the output signal is input to the control circuit 23 consisting of a microcomputer, etc., and at the same time, signals from the rotation speed sensor 24, pressure sensor 25, and flow rate sensor 26 are also input. be done. Then, the control circuit 23 calculates a value that allows efficient operation, and controls the throttle of the engine 3 and the pressure regulating valve by the servo motors 30 and 31 to achieve that value.
It is automatically adjusted to the optimum value.

(f) Effects of the device By configuring the device as described above, the device achieves the following effects.

First, since the tachometer has scales for pressure and discharge amount, it is now possible to easily adjust the pressure to the optimum level by looking at the tachometer.

Second, since work can be performed with optimal efficiency, unnecessary operation is avoided, work accuracy is improved, and fuel consumption is reduced.

[Brief explanation of drawings]

Figure 1 is an overall front view of the set dynamic jet. Figure 2 is a front view of the tachometer. FIG. 3 is a control circuit block diagram. Fourth
The figure is a graph showing the relationship between rotation speed, pressure, and discharge amount. 1...Set table, 3...Engine, 4...Power sprayer, 5...Operation panel, 17...Tachometer.

Claims (1)

[Scope of utility model registration request] In a set dynamic injection system in which an engine 3 and a power sprayer 4 are arranged on a set table 1, a tachometer 17 is arranged on the operation panel 5, and the display section of the tachometer 17 shows the optimum efficiency pressure according to the rotation speed. A performance display set dynamic jet characterized by being configured to display a discharge amount and a discharge amount.