JPS6022001Y2 - City garbage quantitative supply device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a metered supply device that continuously supplies municipal waste at a predetermined rate.

Municipal garbage includes a variety of miscellaneous items such as chiyusuke, seat valves, etc., and has a high porosity and is highly compressible. In order to maintain good efficiency, it is necessary that a constant supply of dirt be carried out.

Conventionally, in this type of fixed-quantity feeding device, the garbage piled up in the hopper is moved to a full conveyor running at the bottom of the hopper, and is pushed into the inlet of the inlet amount regulating section 3 as shown in Fig. 1. , and is regulated by the height h up to the upper edge 7 of the inlet port, and is leveled into a layer of thickness h to maintain quantitative properties.

However, in this type of device, bridges are often formed in the hopper, making the feeding unstable, and the bridges must be broken each time to allow free fall.

The present invention solves these problems and provides a metering device for dispensing compressible materials, especially municipal waste, in which bridging does not occur in the hopper.

The inventors of the present invention discovered that bridging in the hopper occurs at the upper part of the inlet of the infeed amount regulating section 3, and the reason for this is that the urban garbage filling the hopper above the conveyor is causing It is presumed that due to this action, when pushed into the inlet, it is sequentially compressed against the upper hopper wall 6 of the inlet and forms a bridge within the hopper.

In other words, if the transfer speed of the conveyor is lowered, the occurrence of bridging can be reduced, but the amount of processing such as combustion will be greatly reduced. Debris accumulates on the conveyor until it is removed, and the compressive force exerted by the conveyor is proportional to the conveying force of the conveyor in the direction of movement within the hopper, making it easy for bridging to occur.

Therefore, we have discovered that the formation of bridges can be prevented by avoiding the concentration of the compressive force by the conveyor on the upper wall 6 of the inlet port and reducing the compressive force by the conveyor, and have completed the present invention. .

An embodiment of the present invention will be described with reference to FIG. 2. A conveyor 2 is provided at the bottom of a hopper 1 for transporting municipal waste through a feed rate regulating section 3 to a crushing or combustion device.

The conveyor 2 of this embodiment is, for example, an apron conveyor in which serrated plates are attached to a bread plate at regular intervals perpendicular to the direction of travel.

An internal conveyor 4 is separately provided in the hopper, and the internal conveyor is, for example, the conveyor 2.
An apron conveyor of the same type is used.

The present invention has solved the problem of hopper clogging due to bridge formation, and the reason for this is thought to be as follows.

That is, the conveyor 2 forcibly feeds the waste into the feeding amount regulating section and conveys it as a layer with a thickness approximately equal to the height h up to the upper edge 7 of the feeding port to maintain quantitative property. The compressive force acting on the upper wall 6 of the inlet port of the amount regulating section 3 is
In the conventional device, the force is expressed as the product of the length L of the conveyor 2 at the bottom of the hopper 1 and the transfer force G per unit length of the conveyor, whereas in the present invention, the force is expressed as the product of the conveyance force G per unit length of the conveyor. The compressive force is a force expressed as the product of the length L' of the conveying surface of the internal conveyor 4 and the conveying force G' per unit length of the conveyor, and G' and L' are By decreasing or decreasing the compressive force G'xL', G
It is thought that bridge formation does not occur because the compressive force is greatly reduced compared to XL and the compressive force on the hopper front wall is also dispersed.

Furthermore, in order to prevent the bridge from becoming obtrusive, the distance S between the front end of the internal conveyor 4 and the hopper front wall 6, and the height H between the conveying surface of the internal conveyor 4 and the conveying surface of the conveyor 2 are required.
It is necessary that the following relationship be satisfied between the height h of the inlet, and the width W of the inlet.

That is, (1) S is within the range of 1/2 h to gong, (2) H is equal to or greater than h, and H - h is
(3) W has a magnitude between h and gong.

This is because a combination outside the above range may form a bridge and cause the hopper to become clogged.

In other words, if S is smaller than 1/2 h, the amount of garbage supplied will be extremely less than the amount of garbage that can be transported, which is uneconomical, and at the same time, bridging is likely to occur between the internal conveyor 4 and the front wall 6 of the hopper, which is not suitable for the present invention. It will be contrary.

Furthermore, if the length is greater than 3 h, the provision of the internal conveyor 4 becomes meaningless, and therefore a bridge will be formed on the upper wall of the inlet to the same extent as in the conventional device.

Furthermore, when h>H, the internal conveyor 4
This reduces the significance of providing this, and bridging is likely to occur on the upper wall of the inlet.

In addition, if the conveying surface of the internal conveyor 4 is too high, the hopper will not be used efficiently and, like the conventional device, will easily form a bridge, so the value of H-h should be equal to or less than the value of S. There must be.

Furthermore, if the width W of the inlet port is too small, it becomes easy to form a bridge, and if it is too large, it is not practical, so h≦
Must be within the range of W≦Gong.

The above results were also experimentally verified from the results of various feeding tests carried out using devices with a dust supply rate of 1 ton/hour to 10 tons/hour.

In this embodiment, the feeding conveyor 2 and the internal conveyor 4 are provided independently and separately, but the upper internal conveyor and the lower feeding conveyor are connected to one continuous conveyor with two conveying surfaces. It may also be configured as a conveyor.

In addition to the apron conveyor, conveyors include
<Bars arranged in a toothed pattern are arranged in pairs and alternately move upward, forward, downward, and backward repeatedly, or move in a circular motion to move the placed object forward or diagonally forward. Various types of conveyors used for transporting municipal garbage can be used, such as those that vibrate the objects placed on the conveyor.

Furthermore, it is very preferable to make the driving rotation speed of the conveyor, especially the internal conveyor 4, variable so that the conveying force can be increased or decreased in order to prevent bridging.

That is, by changing the drive rotational speed in consideration of the amount of garbage input and the compression force, an excellent effect can be exerted in preventing the occurrence of bridging due to the synergistic effect with the above conditions.

As described above, the present invention can eliminate clogging of the hopper due to bridge formation, so it is possible to prevent a decrease in work efficiency due to interruptions in operation.

The present invention can be used not only for municipal waste but also for the quantitative supply and transportation of compressible substances, and is an industrially useful invention.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing the structure of a conventional municipal waste quantitative supply device, and FIG. 2 is a vertical cross-sectional view showing the structure of an embodiment of the device of the present invention. 1...hopper 2...conveyor,
3...Feeding amount regulation section, 4...Internal conveyor, 5...Municipal garbage, 6...Hopper front wall, 7...・Top edge of inlet, h...
Inlet height, L... Length of hopper bottom conveyor surface, L... Length of conveyance surface of internal conveyor, S... Internal conveyor and hopper front wall H: Height of the internal conveyor transport surface from the conveyor transport surface.

Claims (1)

[Claims for Utility Model Registration] A fixed quantity supply device for municipal waste, comprising a hopper 1, a conveyor 2 provided at the bottom of the hopper, and a feed rate regulating section opened at the bottom of the hopper front wall 6, wherein , an internal conveyor 4 is provided to move the contents of the hopper toward the feed rate regulating section, and the height from the conveying surface of the conveyor to the upper edge 7 of the feed port of the feed rate regulating section is h. , the height from the conveyance surface of the conveyor to the conveyance surface of the inner conveyor is H11, and the distance from the front end of the conveyance surface of the inner conveyor to the front wall of the hopper is S1
The width of the inlet of the infeed amount regulating section is W1 of the conveyor 2.
The fixed quantity supply of municipal waste is characterized in that it is constructed so that the following relational expression holds true, where the transfer force per unit length of the internal conveyor 4 is 61 and the transfer force per unit length of the internal conveyor 4 is G'. Device. (1) 1/2h≦S≦□□□ (2) O≦H−h≦5 (3) h≦W≦) (4) G>G'