JP4208355B2 - Garbage discharge screw feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a screw feeder that is used for collecting garbage discarded from a household in a cyclone and separating it from an air flow in the cyclone and transferring the garbage falling from the cyclone to another storage and discharge machine.
[0002]
[Prior art]
FIG. 5 shows a conventional apparatus for collecting household waste, wherein a is a cyclone, b is a screw feeder, c is a storage and discharge machine, the cyclone a has a vacuum transport pipe a1 and a negative pressure pipe a2, and a screw feeder b Includes a dust container b1, an extrusion hole b2, and a screw b3 driven by a motor M. Garbage falling from the cyclone a to the dust container b1 of the screw feeder b receives thrust by the screw b3 and is pushed out from the extrusion hole b2 to the storage / discharger c, but a part of the garbage from the front wall b11 to the side walls b12, It is pressed around the extrusion hole b2 over b13 and adheres in an arch shape, covering the upper front part of the screw b3 and forming an initial bridge d.
[0003]
When this initial bridge d is generated, this triggers a rapid formation of a bridge that covers the entire upper portion of the screw b3, and it becomes impossible to discharge the dust with the screw b3. The bridge d is mainly made of leftover food, food waste, paper, etc., but once formed, it becomes hard and will not break even if it is hit with a crane, so it needs to be processed while the bridge d is small. In the screw feeder b having a daily waste disposal amount of 5 tons, a bridge is generated once every few days and must be removed every time. In order to suppress the generation of the bridge, the present applicant covers two corners b14 and b15 formed by the front wall b11 and the side walls b12 and b13 with inclined asymmetric guide plates having different sizes. Was first proposed (Japanese Patent Application No. 10-354928). According to this configuration, the force applied to the dust in the vicinity of the extrusion hole b2 becomes unbalanced from left to right, and the dust is liable to collapse, and the generation of the bridge is suppressed, so that the removal work can be performed two to three times a month. Became.
[0004]
[Problems to be solved by the invention]
It is an object of the present invention to further suppress the generation of bridges and reduce the number of removals.
[0005]
[Means for Solving the Problems]
Means for Solving the Problem is a screw feeder for discharging waste that is provided under a cyclone that vacuums and separates waste and operates under vacuum, as described in claim 1, and contains the waste. The part is formed with two side walls inclined in a substantially V shape, the front wall, the rear wall, and the bottom of the lower end of the side wall, and an extrusion hole is provided in the front wall near the bottom, with the front end of the screw facing it. In the discharge screw feeder, the left and right corners where the front wall and the two side walls intersect with each other are covered with an oblique guide plate, and an air outlet facing the vicinity of the upper part of the inlet of the extrusion hole is provided on one or both of the side walls. An air pipe that can be opened and closed by a valve is connected to the air outlet, and external air is intermittently ejected into the negative pressure screw feeder, and the oblique guide plates covering the left and right corners are different in size on the left and right. To be asymmetrical It is characterized by. According to this means, the atmospheric pressure air flows into the negative pressure screw feeder from the air outlet, so that the force applied to the dust is unbalanced by the action of the asymmetric guide plate. It is difficult to form a bridge, and air is mixed in the dust that tends to form a bridge near the extrusion hole, making it difficult for the dust to harden and move along an oblique guide plate. Hateful.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the housing estate A shown in FIG. 1, 1 is a high-rise house, 2 is a low-rise house, and the high-rise house 1 is provided with a dust chute 3 having a garbage inlet 3 a. It is connected to the transport pipe 5 via. Near the low-rise housing 2, there is a ground inlet 6, which is connected to another transport pipe 5. Both transport pipes 5 and 5 are connected to the switch 7 and further connected to the dust separators 8 and 8. In the figure, 9 is an intake port, 10 and 11 are inspection ports, and 12 is a shut-off valve.
[0009]
The garbage separation device 8 includes a cyclone 13, a screw feeder 14, a storage / discharge device 15, a bag filter 16, and a blower 17 serving as a vacuum source. The cyclone 13 is attached to a bag portion 16 a of the bag filter 16 by a negative pressure pipe 18. The intake part 16 b of the bag filter 16 is connected to the blower 17 by a negative pressure pipe 19. An opening / closing valve 20 is provided on the lower surface of the bag portion 16 a, and an air pipe 21 is connected to the opening / closing valve 20. An outlet side of an outside air valve 21b having an outside air inlet 21a is connected to the upper part of the air pipe 21, and the other end side of the air pipe 21 opens into the screw feeder 14 as an air outlet 21c (FIG. 2). The air spout 21c is directed to the vicinity of the upper part of the inlet of the push-out hole 27 of the dust container 22 described later. Since the inside of the screw feeder 14 communicates with the inside of the cyclone 13 and has a negative pressure, when the on-off valve 20 is closed and the outside air valve 21b is opened, outside air flows into the screw feeder 14 from the air outlet 21c.
[0010]
The air pipe 21 uses a dust transfer pipe that is used to transfer dust that has fallen into the bag portion 16a into the screw feeder 14 when the bag of the bag filter 16 is periodically cleaned. The outlet of the dust transfer pipe and the outflow direction in the inside are changed and directed toward the vicinity of the upper part of the inlet of the extrusion hole 27. However, the air pipe 21 may be provided separately from the dust transfer pipe.
[0011]
As shown in FIGS. 2 to 4, the screw feeder 14 is provided with a screw 23 in a dust accommodating portion 22, and the dust accommodating portion 22 includes V-shaped side walls 24 a and 24 b, a bottom portion 24 c, a front wall 25, and a rear portion. It consists of a wall 26, an extrusion hole 27 is opened in the front wall 25, and the front end of the screw 23 is located here. The screw 23 is supported by bearings 28 a and 28 b and is driven by a motor 29 and a chain mechanism 30. In addition, 14a is a connection part with the cyclone 13. As shown in FIG.
[0012]
Inclined guide plates 31 and 32 are welded to both corners on the front wall 25 side in the dust container 22, and the guide plates 31 and 32 are asymmetrical with different sizes or inclinations on the left and right. This configuration is described in the previous application, and this makes it difficult to form the bridge d that covers the upper portion of the extrusion hole 27. In addition, 31a and 32a are slope plates which block the upper part of a guide plate.
[0013]
In the present invention, the formation of the bridge d is further reduced. As the means, the air pipe 21 is connected to the side wall 24a of the dust container 22 to form the air jet 21c, and the air jet 21c. Is directed to the vicinity of the upper part of the inlet of the extrusion hole 27. Then, the outside air valve 21b is opened, and atmospheric air is intermittently ejected from the air outlet 21c by an internal negative pressure, and in the vicinity of the guide plate 31, air flows between the dust and between the dust and the wall surface. Are mixed so that the waste can be easily moved to prevent the waste from being rooted in the vicinity of the extrusion hole 27. As a result, the formation of the bridge d is prevented, and almost no cleaning is required.
[0014]
The bridge formation preventing action by the air jet is not limited to the above-described guide plates 31 and 32 having a structure in which a guide plate is not provided as well as an asymmetric one having a different size or inclination on the left and right, and a symmetrical guide plate. Since this also occurs in a structure having a structure to be provided, the present invention can be applied to a structure having these structures. Moreover, the air ejection port 21c can be provided in the side walls 24a and 24b on both sides.
[0015]
【The invention's effect】
As is apparent from the above description, according to the means of claim 1, the force applied to the dust becomes unbalanced due to the action of the asymmetric guide plate, and it is difficult to form a bridge, and the front wall of the dust container is pushed out. Air mixes with the dust that tends to form a bridge near the hole, making it difficult for the dust to harden and move, so the dust moves smoothly along the diagonal guide plate and the bridge is less likely to form. Has the effect of reducing.
[Brief description of the drawings]
FIG. 1 is an overall view of equipment for carrying out the present invention. FIG. 2 is a side view of the main part of an embodiment of the present invention. FIG. 3 is a view in the direction of arrow III in FIG. ] Longitudinal section of the conventional device [Explanation of symbols]
DESCRIPTION OF SYMBOLS 13 Cyclone 14 Screw feeder 15 Storage discharge machine 16 Bag filter 20 Switching valve 21 Air pipe 21c Air outlet 22 Garbage accommodating part 24a, 24b Side wall 25 Front wall 27 Extrusion port 31, 32 Guide plate

Claims (1)

A dust discharge screw feeder that is provided under a cyclone that vacuums and separates waste and operates under vacuum, and the waste container includes two side walls, a front wall, and a rear wall that are substantially V-shaped. In the screw feeder for discharging waste, which is formed at the bottom of the lower end of the side wall, provided with an extrusion hole in the front wall near the bottom, and facing the front end of the screw to this,
Cover the left and right corners where the front wall and the two side walls intersect with an oblique guide plate, and provide an air outlet on one or both of the side walls facing the upper part of the inlet of the extrusion hole. Connected air pipe that can be opened and closed with, and intermittently ejected outside air into the negative pressure screw feeder, and the oblique guide plates covering the left and right corners were made asymmetrical with different sizes on the left and right A screw feeder for waste discharge.

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