JPH0429882Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a nozzle cover for a spraying device equipped with an axial blower.

[Conventional technology]

As shown in FIG. 4, a conventional spraying device of this type includes a substantially cylindrical frame a having an inlet e and an outlet f formed on both side edges, and an impeller b installed in the frame a. and a drive means b' for the impeller b, a dustproof screen d covering the opening of the suction port e, and a plurality of nozzles g arranged in a row inside the discharge port f. It is formed from.

[The problem that the idea attempts to solve]

However, in the conventional spraying device, since a plurality of nozzles g are arranged inside the discharge port f,
The disadvantage is that the air resistance increases, the air volume decreases, and the efficiency decreases. In order to eliminate this drawback, there is also a configuration in which the nozzle g is arranged along the outside of the discharge port f (as shown by the two-dot chain line in FIG. 4). However, if the nozzle g' is disposed outside the discharge port f, the nozzle g' may come into contact with the tree during the spraying operation and may be damaged. Further, since the nozzle g' is disposed outside the discharge port f, it is difficult to make the spray finer using the wind pressure of the blower c.

[Means to solve the problem]

This idea was devised in view of the above-mentioned circumstances, and includes a substantially cylindrical frame having an inlet and an outlet on both sides, a blower built into the frame, and an air blower that covers the opening of the inlet. dustproof net,
This is a nozzle cover of a spraying device formed from a plurality of nozzles arranged in a row on the outer edge of the discharge port.
A passage formed between the outlet edge and a cylindrical cover body that is attached to the outer side of the outlet of the nozzle cover and can cover the outer side of the nozzle is connected to the outlet from the outside of the frame. It communicates with the tip of the discharge port. This makes it possible to make the mist particles from the nozzle finer without reducing the air volume, increase the air volume at the tip of the discharge port by allowing secondary air to flow in, and protect the nozzle. to provide a nozzle cover.

〔Example〕

The nozzle cover of the spraying device of this invention will be explained below with reference to the accompanying drawings.

FIG. 1 is a sectional view showing a spraying device equipped with a nozzle cover of this invention. In the figure, 1 is a frame formed in a substantially cylindrical shape, and the frame 1 has a taper 3 tapered toward one side edge. is formed, one side edge opening is used as a discharge port 4, and the other side edge opening is opened in the shape of a flap to form an inlet port 5. The frame 1 is placed on a base 7 via legs 6. In addition,
The frame 1 is arranged by a cylinder 8 so as to be swingable vertically and horizontally. The intake port 5 of the frame 1 is covered with a curved dustproof net 9. An impeller 11 equipped with a drive means 10 such as a hydraulic motor is disposed within the frame 1 to form a blower 2. A plurality of nozzles 13 for spraying a fluid such as a chemical solution are provided along the outer side of the discharge port 4 to form a spraying device 12 . A chemical solution is pumped into the nozzle 13 from a chemical solution supply source by a pump (not shown).

The cover 20 of this invention is provided with a cylindrical cover body 21 that can be covered along the outside of the plurality of nozzles 13, and between this cover body 21 and the discharge port 4, the air is discharged from the outside of the frame 1. Exit 4
It has a structure in which a passage 22 is formed which communicates with the tip of the tube. Note that the discharge port 4 of the cover main body 21
It is also possible to form a curved portion 23 by protruding the side end beyond the discharge port 4 in the discharge direction and by curving the end of the cover body 21 on the discharge port 4 side toward the discharge port 4 side.

Next, the attachment of the frame 1 and the cover body 21 will be described.

FIG. 2 is a sectional view showing the attachment portion between the frame 1 and the cover body 21, and FIG. 3 is a perspective view of the support piece 24 interposed between the frame 1 and the cover body 21.

By screwing and supporting the cover body 21 with a plurality of support pieces 24 having elongated holes 26 parallel to the axial direction of the frame 1 on the outer edge of the discharge port 4, the cover body 21 can be moved forward and backward with respect to the frame 1. Take root.

That is, the support piece 24 is a plate-like piece with a square cross section, and a circular hole 25 is formed in the parallel plane as shown in FIG.
A long hole 26 is formed therein, and the frame 1 is fixed to the frame 1 by a pin screw 27 inserted through the circular hole 25. The cover main body 21 overlaps the mounting hole provided therein with the elongated hole 26 on the support piece 24,
A bolt 28 can be inserted through it and tightened between it and a square nut 29.

[Effect of idea]

As described above, the nozzle cover of this invention has the following effects.

(1) Since the nozzles are covered on the outside by this nozzle cover, they are protected from collisions with trees, etc., and damage is prevented.

(2) Since the nozzle is located outside the discharge port,
It is possible to eliminate anything that causes resistance inside the discharge port, and it is possible to reduce air volume loss.

(3) Within the narrow passage between the cover body and the outside of the frame, the chemical solution is sprayed from the nozzle in the discharge direction of the blower, and a large amount of air discharged from within the frame moves in front of the discharge part of the passage. Therefore, the inside of the passage becomes a negative pressure, secondary air flows into the passage from the outside, and the spray liquid becomes finer. Furthermore, the amount of air behind the discharge port can be increased by the inflow of secondary air.

(4) Since the nozzle is placed outside the discharge port, when spraying from the nozzle is stopped, it is possible to prevent the chemical liquid from entering the frame due to dripping from the nozzle. can be protected.

(5) By making the cover body movable toward and away from the frame, the spread of the sprayed mist can be adjusted.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing a spraying device equipped with a nozzle cover of this invention, Fig. 2 is a cross-sectional view showing the attachment part between the frame and the cover body, Fig. 3 is a perspective view of the support piece, and Fig. The figure is a sectional view showing a conventional spraying device. In the drawings, 1... frame, 2... blower, 4... discharge port, 5... suction port, 9... dustproof net, 11... impeller, 12... spreader, 20...
...Nozzle cover of this invention, 21...cover body, 22...passage, 23...curved portion.

Claims (1)

[Claims for Utility Model Registration] (1) A substantially cylindrical frame 1 having an inlet 5 and an outlet 4 on both side edges, a blower 2 installed in this frame 1, and an opening for the inlet 5. A nozzle cover 20 for a spraying device 12 formed of a dustproof net 9 to be covered and a plurality of nozzles 13 arranged in a row on the outer edge of the outlet 4, the nozzle cover 20 being attached to the outer side of the outlet 4. a cylindrical cover body 21 that can be covered along the outside of the nozzle 13;
and the edge of the discharge port 4.
A nozzle cover for a spraying device, which communicates from the outside of the frame 1 to the tip of the discharge port 4. (2) A nozzle cover for a spraying device according to claim 1, wherein the end of the cover main body 21 on the side of the discharge port 4 protrudes beyond the tip of the discharge port 4 in the discharge direction. 3. A nozzle cover for a spraying device according to claim 1, wherein a curved portion 23 is formed by curving an end portion of the cover body 21 on the side of the discharge port 4 toward the discharge port 4 side.