JP2865177B2 - Clogging prevention device for spraying equipment for greening method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing clogging of a spraying device used for a method of greening a slope or the like.

[0002]

2. Description of the Related Art FIG. 1 is a view showing an embodiment of the present invention. Of these, known parts will be described for better understanding of the present invention.

In FIG. 1, an upper hopper 3 is provided above a storage chamber 2 defined in a main body 1 of a spraying device A, and a lower hopper 5 is provided in the middle. An upper slide valve 4 that is opened and closed by an upper cylinder (not shown) is provided at an opening of the upper hopper 3, and a lower slide valve 6 that is opened and closed by a lower cylinder (not shown) is provided at an opening of the lower hopper 5. ing. This storage room 2
A screw feeder 10 is provided at a lower part of the hollow screw shaft 11, an ejection port 11a is provided at one end of the hollow screw shaft 11, and a sprocket 7 and a swivel 8 for a screw drive motor M are provided at opposite sides. I have. An air supply pipe provided with an air supply valve from a compressed air source is connected to the swivel 8.

The upper slide valve 4 is opened to supply the material, the lower slide valve 6 is opened to drop the sprayed material, and the screw feeder 10 is operated to convey the material to the discharge port 1a. The material is pressure-fed with compressed air from the jet port 11a and is sprayed on the slope.

[0005]

In the conventional spraying apparatus A, a cone upper portion 1b formed inside the jet port 11a is provided.
And the screw feeder 10 of the storage chamber 2 may be clogged with the spray material, and spraying may not be possible.

An object of the present invention is to provide a device for preventing clogging of a spray material, which prevents clogging of a spraying device for a greening method.

[0007]

According to the present invention, a screw feeder is disposed below a spray material storage chamber provided with an upper hopper having an upper slide valve and a lower hopper having a lower slide valve. Operating the screw feeder to convey the spray material, spray compressed air from the end of the hollow screw shaft and pressure-feed the spray material from a discharge port. A plurality of compressed air outlet pipes are set up toward the outlet.

Further, according to the present invention, a discharge pipe for compressed air directed toward the end of the hollow screw shaft is provided in the vicinity of the discharge port of the spraying device for the greening method, and an opening / closing valve interposed in the discharge pipe is controlled via a controller. Connected to a pressure sensor provided below the storage chamber, and the controller is connected to a drive motor of a hollow screw shaft and an air supply valve.

Further, according to the present invention, an agitator is provided immediately above the screw feeder in parallel with the axis.

[0010] The hollow screw shaft end is preferably provided in the middle of the upper part of the cone formed inside the discharge port.

It is preferable that the ejection pipe is formed on an elbow and is provided upright on a hollow screw shaft so as to also serve as an agitator.

Preferably, the agitator is formed of a U-shaped steel bar.

[0013]

In the structure for preventing clogging of the spraying device for the greening method constructed as described above, when the spray material is conveyed by operating the screw feeder, the jet pipe provided on the hollow screw shaft also turns, and the agitator action is performed. Thus, the spray material at the upper part of the cone is agitated and sent to the discharge port side by compressed air from the ejection port, thereby preventing the spray material at the upper part of the cone from being clogged.

When the spray material clogs the upper part of the cone and the pressure in the storage chamber rises to a predetermined pressure, the controller stops the screw feeder based on the signal from the pressure sensor and stops the ejection of the compressed air. Next, the open / close valve is opened to eject compressed air from the ejection pipe to apply a reverse pressure, and then the compressed air is ejected from the hollow screw shaft to eliminate clogging of the spray material.

Further, the rotation of the agitator agitates and loosens the spray material immediately above the screw feeder, thereby preventing the screw material from being clogged with the spray material.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a plurality (two in the illustrated example) of elbow ejection pipes 12 are erected in the vicinity of the ejection port 11a of the screw shaft 11 so as to face each other. The ejection port 12a of the ejection pipe 12 is opened toward the transfer side at a position radially outward of the ejection port 11a and close to the cone upper portion 1b.

Therefore, when the screw feeder 10 is operated to convey the spraying material during spraying, the ejection pipe 1
Both 2 and 12 also turn. Therefore, the spray material of the upper part 1b of the cone is agitated by the agitator action of the swirling ejection pipes 12 and 12 and further sent to the ejection port 1a side by compressed air ejected from the ejection port 12a of the ejection pipe 12. As a result, the clogging of the spray material in the cone upper portion 1b is prevented.

FIG. 2 shows another embodiment of the present invention, in which compressed air is blown obliquely inward toward the discharge port 11a toward the discharge port 11a toward the discharge port 11a on the cone upper portion 1b of the spraying device A1. An opening / closing valve 1 provided on an ejection pipe 13
4 is connected via a controller 15 to a pressure sensor 16 provided slightly above the screw feeder 10 of the storage chamber 2, a pressure display 17 is connected to the pressure sensor 16, and a motor M and an air supply valve are connected to the controller 15. This is an example in which connection is made and the other components are configured in the same manner as in FIG. At the time of spraying, when the spray material is clogged in the cone upper portion 1b and the pressure in the storage chamber 2 rises to a predetermined pressure, the controller 15 stops the operation of the screw feeder 10 based on a signal from the pressure sensor 16, and the air supply valve Close. Next, the opening / closing valve 14 is opened, and instantaneous compressed air is ejected from the ejection pipe 13 to apply a reverse pressure.
A compressed air is blown out from a to eliminate clogging of the spray material. Then, when the clogging is cleared and the detection pressure of the pressure sensor 16 returns to the original value, the controller 15 operates the screw feeder 10 to restart the transport of the spray material.

FIG. 3 shows another embodiment of the present invention, in which an agitator 18 is provided above the screw feeder 10 of the spraying device A2, and is configured similarly to the other FIG. The agitator 18 is formed by, for example, forming a bar having an outer diameter of 10 mm in a U-shape, and disposing the turning outer diameter at an interval D (for example, 10 cm) with respect to the outer edge of the screw feeder 10 in parallel with the hollow screw shaft 11. And driven by a motor M1. A remaining amount detection sensor 19 protrudes on the axis of the agitator 18. Therefore, the spray material immediately above the screw feeder 10 is stirred and loosened by the rotating agitator 18.
Therefore, clogging of the spray material in the screw feeder 10 is prevented, and the spray material is prevented from adhering to the remaining amount detection sensor 19.

[0021]

According to the present invention, as described above, the clogging of the spray material can be reliably eliminated.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a first embodiment of the present invention.

FIG. 2 is a side sectional view showing a second embodiment of the present invention.

FIG. 3 is a side sectional view showing a third embodiment of the present invention.

[Explanation of symbols]

 A, A1, A2 ... spraying device 1 ... body 1a ... discharge port 1b ... cone upper part 2 ... storage chamber 3 ... upper hopper 4 ... upper slide valve 5 ... Lower hopper 6 Lower slide valve 7 Sprocket 8 Swivel 10 Screw feeder 11 Hollow screw shaft 11a Spout 12 Spout pipe 12a Spout 13 ... ejection pipe 14 ... opening and closing valve 15 ... controller 16 ... pressure sensor 17 ... display unit 18 ... agitator

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 17/20 102

Claims (3)

(57) [Claims] 1. A screw feeder is provided below a spray material storage chamber provided with an upper hopper provided with an upper slide valve and a lower hopper provided with a lower slide valve,
The screw feeder is operated to convey the spraying material, the compressed air is blown from the end of the hollow screw shaft, and the spraying material is pressure-fed from the discharge port. A device for preventing clogging of a spraying device for a greening method, wherein a plurality of compressed air ejection tubes directed toward the side are provided upright. 2. A blow-off pipe for compressed air directed toward the end of the hollow screw shaft is provided in the vicinity of the discharge port of the spraying device for a greening method,
2. The valve according to claim 1, wherein an opening / closing valve interposed in the ejection pipe is connected to a pressure sensor provided in a lower portion of the storage chamber via a controller, and the controller is connected to a driving motor of a hollow screw shaft and an air supply valve. A clogging prevention device for the spraying device for a greening method according to the above description. 3. The apparatus for preventing clogging of a spraying device for a greening method according to claim 1, wherein an agitator is provided directly above the screw feeder in parallel with the axis.