JPH0446855Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is mainly based on the discharge volume of a blower in a chemical spraying vehicle suitable for spraying chemicals while traveling on narrow slopes such as pears, grapes, and other trellising crops. This relates to a device that is to be adjusted.

[Conventional technology]

For agricultural chemical spraying vehicles that use a single prime mover for traveling and chemical spraying, the air volume may be adjusted depending on the growth status of agricultural crops, such as pears and grapes, and the time of spraying. You may want to do this. In this case, the following measures have been taken in the past. That is, the power take-off section is equipped with some kind of stepped or continuously variable transmission.

The air volume is adjusted by covering the outlet of the nozzle-equipped jet head.

By lowering the rotational speed of the prime mover, the rotation of the blower is reduced.

By covering the air inlet of the blower,
Adjust the air volume (as an example,
issue).

[The problem that the idea aims to solve]

Each of the conventional measures described above has the following problems. In other words, if (a) the cost is high; (b) Sufficient space is required to incorporate the equipment. (c) In the case of a stepped system, the air volume will be limited.

In this case, (a) it can only be partially utilized; (b) Depending on the area covered, surging may occur, which is dangerous.

In this case, (a) the rotation of the power sprayer and the speed of the vehicle decrease, making it inconvenient as it takes time to spray the specified amount. (b) If the vehicle speed is made continuously variable to compensate for this inconvenience, costs will increase.

In the case of (a), since the air intake section is blocked, the air inflow area decreases and the inflow speed increases, resulting in increased noise and problems with the stall section. (b) Since it covers the hub part, it no longer fulfills its original role as a hub. (c) Since it is on the suction side, depending on the fixing method, there is a risk that it will loosen due to vibration and be sucked in, damaging the blade.

[Means to solve the problem]

Here, this invention includes a self-propelled truck, a chemical tank mounted on the self-propelled truck, a prime mover, an axial blower, and a nozzle having a nozzle, and includes a discharge port of the axial blower driven by the prime mover. In a chemical dispersion vehicle that sends a chemical liquid from a chemical liquid tank to a nozzle of a jet head that is communicated via an appropriate liquid feeding means,
An axial flow blower includes a fan, a fan case in which the fan is housed and has a number of through holes in the side edge thereof, and a cover that is movably attached to the fan case in an axial direction to cover the through holes. We have proposed a blower discharge amount adjustment device for a chemical spray vehicle that can adjust the amount of air discharged from the discharge port depending on the amount of coverage of the through hole, and thereby solved the problems of the above-mentioned conventional technology at once. It is something.

[Effect]

The displacement of the amount of coverage of the through hole of the fan case moves the cover in the axial direction of the fan case. When discharging the entire amount of air sucked by the fan from the discharge port, move the cover to one side to cover all the through holes. Also, when reducing the amount of discharge from the discharge port,
The amount of coverage of the through hole is reduced by moving the cover to the other side and into position.

〔Example〕

Next, this invention will be explained in detail with reference to the drawings.

In FIG. 1, 1 is a self-propelled cart, and on this self-propelled cart 1 are a chemical tank 2 and a prime mover 3.
, an axial blower 4 , and a jet head 6 having a nozzle 5 are mounted, and as the motor 3 that also controls the running of the self-propelled cart 1 rotates, the chemical solution in the drug tank 2 is appropriately fed. Nozzle 5 of jet head 6 through means
At the same time, the chemical liquid ejected from the nozzle 5 is directed in a predetermined direction by being carried by the airflow generated as the fan 7 of the axial blower 4 driven by the prime mover 3 rotates. The spraying work is carried out in such a way that it scatters into the surrounding areas.

In this invention, as shown in detail in FIGS. 2 and 3, a large number of through holes 9 are bored in the side edge of a fan case 8 in which the fan 7 of the axial blower 4 is housed. In practice, it is considered that part or all of it is made of perforated iron plate (punched metal), and if the whole part is made of perforated iron plate, air leakage is a problem. For example, the outer periphery of the lower portion may be covered with a non-perforated iron plate or the like.

The through hole 9 of the fan case 8 is covered by a cover 10 that is movable along the fan case 8 in the axial direction. The cover 10 can be attached to the fan case 8 by providing a protrusion on the cover 10 side that engages with a long groove drilled in the fan case 8, or by attaching the cover 10 along a rail formed on the outer surface of the fan case 8. By sliding the cover 10, the amount of coverage of the through hole 9 is changed, and accordingly, the discharge from the outlet 11 of the axial blower 4 is changed. The amount of air is made variable, and the mounting position of the cover 10 to the fan case 8 is fixed with bolts 12, for example. In the figure, 13 is a rectifying fan (static vane), and 14 is an air intake port.

The operation of this embodiment will be explained.

In the above-described configuration, when the cover 10 is used in a state that covers all the through holes 9 formed in the fan case 8, the entire amount of air sucked by the fan 7 flows from the discharge port 11 to the jet head 6. However, when it is desired to adjust the air volume to a desired level, the cover 10 is slid to open a portion of the through hole 9. When the fan 7 is rotated in this state, the air is guided to the jet head 6 and at the same time a part of it flows out of the fan case 8 through the through hole 9, and the remaining air that leaked outward is left in the jet head 6. Since the amount of air is guided,
As a result, the blower discharge amount can be adjusted.

[Effect of idea]

According to this invention, since it has the above-mentioned structure and can obtain the functions, it has the following effects. In other words, the discharge air volume can be adjusted steplessly without using a complicated mechanism.

The air discharged from the jet head and the holes in the fan case expands the discharge width, making it possible to softly spray the chemical solution over the entire tree to be sprayed.

There is no need to sacrifice the space of conventional equipment.

It can be manufactured at low cost.

Since the discharge port is not blocked, there is no need to worry about pressure increase.

[Brief explanation of the drawing]

FIG. 1 is a side view of a chemical dispersion vehicle equipped with the device of this invention, FIG. 2 is an enlarged sectional view of the main part of this invention, and FIG. 3 is a perspective view of a portion thereof. In the figure, 1...self-propelled truck, 2...chemical tank, 3...prime mover, 4...axial blower, 5...
... Nozzle, 6 ... Jet head, 7 ... Fan, 8 ... Fan case, 9 ... Through hole, 10 ... Cover, 11
...It is a discharge port.

Claims (1)

[Scope of utility model registration request] A self-propelled trolley 1, a chemical tank 2, a prime mover 3, an axial blower 4, and a nozzle 5 mounted on the self-propelled trolley 1.
and a jet head 6 having a jet head 6 , from the chemical liquid tank 2 to the nozzle 5 of the jet head 6 which is communicated with the discharge port 11 of the axial blower 4 driven by the prime mover 3 via a suitable liquid feeding means. In a chemical dispersion vehicle that sends a chemical solution, the axial blower 4 includes a fan 7, a fan case 8 in which the fan 7 is housed and a number of through holes 9 are bored in the side edges, and these through holes 9.
and a cover 10 movably attached to the fan case 8 in the axial direction to cover the fan case 8, and the amount of air discharged from the discharge port 11 can be adjusted according to the amount of coverage of the through hole 9. Features: Blower discharge amount adjustment device for chemical spray vehicles.