JP2000302219A - Dust preventing chute - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chute which eliminates the need for changing the heights of the chute and a conveyor in response to the height of a deposition of powder. SOLUTION: This chute is provided with a chute body on which narrow strip-like sheets 5 are provided along the lower circumference of a cylindrically coiled sheet 4, plural rings 6, 7, 8 arranged on the outer peripheral surface of the chute body at intervals, a string 11 for connecting the rings, and a ring elevating and lowering device 10 for lifting or lowering the string 9 fastened to the lowermost ring 7 to elevate or lower the rings 7, 8 in order.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust-preventing chute for depositing powder and particulate matter conveyed by a conveyor or the like.

[0002]

2. Description of the Related Art A chute has been used to convey powder or granular material (hereinafter referred to as "powder") on a belt conveyor or the like and deposit it at a predetermined location. As the chute, a chute having a cylindrical shape or a divergent cylindrical shape made of a sheet of rubber or the like has been used.

[0003]

Since the length of the chute is fixed, an apparatus for increasing the height of the chute and the belt conveyor for feeding the powder into the chute as the height of the powder accumulation becomes higher is known. This is necessary, and this device has caused an increase in cost.

[0004] The present invention has been made in view of the above problems, and has as its object to provide a chute that does not require changing the heights of the chute and the belt conveyor in accordance with the powder accumulation height.

[0005]

According to the first aspect of the present invention, there is provided a chute body having a strip-shaped sheet provided along a lower circumference of a cylindrically wound sheet;
A plurality of rings arranged at intervals on the outer periphery of the chute body, a string connecting the rings, and a ring elevating device for raising and lowering the strings tied to the lowermost ring to sequentially raise and lower the rings; , Is provided.

[0006] The chute body is set at a powder drop position of a powder conveying device such as a belt conveyor so that the powder is charged. Each ring descends by its own weight and stops at a position suspended by a string connecting the rings. In this state, the belt conveyor is operated to drop the powder onto the chute. The powder falls inside the chute body and accumulates. At this time, the generation of dust is prevented by the strip-shaped sheets arranged in a circumferential shape. As the powder deposition height increases, the lowermost ring is wound up by a ring elevating device. When the bottom ring rises up to the ring above it, this ring also rolls up. In this way, when reaching the ring provided immediately below the cylindrical sheet, the winding is stopped. As a result, the strip-shaped sheet covers the powder deposited in a mountain-like manner, thereby preventing the generation of dust.

In the invention according to claim 2, the strip-shaped sheets overlap each other in the width direction.

By arranging the strip-shaped sheets so as to overlap each other in the width direction, it is possible to prevent the powder from being scattered from the boundary of each strip.

According to the third aspect of the present invention, the ring elevating device winds up the ring at a constant speed in accordance with a state of a conveyed object put into the chute.

[0010] As the conveyed object is thrown into the chute and the pile height increases, the ring is raised at a constant speed, so that the strip-shaped sheet covers these in accordance with the change of pile of the pile, and the dust is covered. To prevent the occurrence of

According to a fourth aspect of the present invention, a level sensor is provided in the chute main body for measuring the height of the deposited material thrown in from the chute, and the ring elevating device is operated in accordance with the value measured by the level sensor. Raise and lower the ring.

[0012] The height of the sediment input from the chute is measured by a level sensor, and the ring is lifted by a ring elevating device according to the height, whereby the strip-shaped sheet changes the pile of the sediment. To prevent dust from being generated.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a dust prevention chute of the embodiment. Numeral 1 conveys the powder 2 by a belt conveyor. A chute 3 is installed at a discharge end of the powder 2 of the belt conveyor 1, and is arranged so that the powder 2 is put into the chute 3. The chute 3 includes a cylindrical portion 4 formed of a sheet wound in a cylindrical shape, and a strip portion 5 formed of a strip-shaped sheet attached along a circumference of a lower portion of the cylindrical portion 4.
And a plurality of rings 6, 7, 8 arranged at intervals around the outer periphery of the cylindrical portion 4 and the strip portion 5, and a lower end fixed to the lower end ring 7, and penetrated through the intermediate ring 8 and the upper end ring 6. A ring wire 9 provided, a wire winding device 10 for winding and lowering the wire 9,
It consists of an inter-ring rope 11 connecting between 7 and 8.

The cylindrical portion 4 and the strip portion 5 constitute a chute body, and a flexible sheet such as rubber is used. Strip part 5
Are mounted on the lower circumference of the cylindrical portion 4 so as to overlap each other, so that the powder is not scattered from the boundary. The rings 6, 7, and 8 are made of metal and have a certain weight, and when the chute 3 is installed, it is lowered by its own weight as shown in FIG. The upper end ring 6 is fixed to the cylindrical portion 4, and the chute 3 is supported by the upper end ring 6. The link wires 9 are provided at three places on the circumference of the ring. Similarly, at least three inter-ring ropes 11 are provided on the ring. Thus, the rings 6, 7, 8 can be moved up and down horizontally.

Next, the operation will be described. As shown in FIG. 1, a conveyor belt 1 and a chute 3 are set, and the powder 2 is put into the chute 3 from the conveyor belt 1. The powder 2 is deposited under the chute 3. The lower part of the strip portion 5 spreads so as to cover the mountain-like accumulation of the powder 2 to prevent the powder 2 from scattering. As the pile height of the powder 2 increases, the lower end ring 7 is wound up by the wire winding device 10. FIG. 2A shows that as the deposition height increases,
A state in which the lower end ring 7 is wound up is shown. When the lower end ring 7 rises to the intermediate ring 8 above it, the intermediate ring 8 also rises. However, it stops at the position of the intermediate ring 8 arranged near the connection between the cylindrical portion 4 and the strip portion 5.

As a method of controlling the wire winding speed of the wire winding device 10, when the powder 2 is conveyed from the conveyor belt 1 at a constant speed, the wire 2 is wound at a certain constant speed corresponding to this speed. In the case of batch transportation in which the material is transported at a fixed amount, the film is wound up intermittently. Further, as shown in FIG. 2 (B), a level sensor 12 for measuring the deposition height of the powder 1 is provided in the chute 3,
The winding height is controlled by the measurement value of the sensor 12. The level sensor 12 is provided with a protective cover 13,
It is moved up and down by the sensor hanging device 14.

[0017]

As is apparent from the above description, according to the present invention, a chute is formed into a strip shape, a ring is fitted on the outer periphery of the chute at an interval, and the ring is pulled up according to the height of the sediment. As a result,
Generation of dust can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2A shows a state in which a ring is wound up,
(B) shows a level sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Belt conveyor 2 Powder 3 Chute 4 Cylindrical part 5 Strip part 6 Upper ring 7 Lower ring 8 Intermediate ring 9 Ring wire 10 Wire hoisting device 11 Rope between rings 12 Level sensor 13 Protective cover 14 Sensor suspension device

Claims (4)

[Claims] 1. A chute body provided with a strip-shaped sheet along a lower circumference of a cylindrically wound sheet, a plurality of rings arranged at intervals on an outer periphery of the chute body, and the ring A dust prevention chute, comprising: a string connecting between the rings; and a ring elevating device that raises and lowers the string tied to the lowermost ring to sequentially raise and lower the ring. 2. The dust prevention chute according to claim 1, wherein said strip-shaped sheets overlap each other in the width direction. 3. The dust-preventing chute according to claim 1, wherein the ring elevating device winds up the ring at a constant speed in accordance with a state of a conveyed object put into the chute. 4. A level sensor for measuring a deposition height of a material thrown in from the chute into the chute main body, and the ring is moved up and down by the ring elevating device according to a value measured by the level sensor. The dust prevention chute according to claim 1, wherein: