JP4405240B2 - Quantitative powder feeder - Google Patents

Description

  The present invention provides a method for determining a granular material by providing a layer thickness regulating means and a compacting means on a conveyor for conveying the granular material so that the granular material can be conveyed in a stable state without causing collapse of the load. It relates to a supply device.

  2. Description of the Related Art Conventionally, in a transport facility that transports a granular material supplied from a hopper by a conveyor, it has been conventionally performed to keep a transport amount constant by using a quantitative supply device. As the fixed amount supply device, a screw feeder attached to the hopper, a rotary valve, a damper or the like is generally used, but the transported material supplied on the conveyor is scraped by the scraping plate of the rotating drum. A metering device has also been proposed.

  As shown in FIGS. 4 and 5, the fixed amount supply device is configured so that a rotating drum 43 that rotates about a rotating shaft 42 provided in a direction (width direction) orthogonal to the conveying direction of the conveyor 41 is provided as an inclined portion of the conveyor 41. 41B. The rotating shaft 42 is supported by a support frame 45 provided outside the left and right side plates 44 of the conveyor 41, and the support frame 45 includes an elevating mechanism 50 including a drive motor 46, a chain 47, a slider 48 and an adjusting screw 49. , And a tensioner 51 are provided.

On the outer periphery of the body 52 of the rotating drum 43, scrapers 53 are provided at equal intervals, and the width of the body 52 is substantially the same as the width of the conveyor 41. A sprocket 54 is attached to the end of the rotary shaft 42, and a chain 47 is wound around the sprocket 54, and the drive motor 46 rotates in the direction opposite to the conveying direction of the conveyor 41 (counterclockwise in the figure).
The distance between the tip of the scraper 53 of the rotating drum 43 and the upper surface of the conveyor 41 is set to maintain a predetermined distance, and the layer thickness of the conveyed product M on the conveyor 41 is regulated by this distance. The layer thickness can be adjusted by moving the rotating drum 43 up and down by the lifting mechanism 50 of the rotating shaft 42.

The transported object M supplied non-quantitatively to the horizontal part 41A on the tail side of the conveyor 41 is rebounded obliquely downward on the tail side by the scraping plate 53 of the rotating drum 43 while being transported to the head side. The layer is scraped and averaged to a thickness substantially equal to the distance between the scraper 53 and the upper surface of the conveyor 41, and is quantitatively conveyed to the head side.
The inclined drum 41 </ b> B of the conveyor 41 is installed at the rotating drum 43 because a force that tries to slide down due to its own weight acts on the transported object M, and a certain amount of layer is formed by collapse before reaching the rotating drum 43. This is because the thickness of the rotating drum 43 is further reduced and the load required when the rotating drum 43 repels the conveyed product M toward the tail side is reduced. (See Patent Document 1).

However, in this fixed quantity supply device, the layer thickness is only adjusted by scraping and leveling the conveyed product M. Therefore, when the repose angle of the conveyed product M is small or the inclined angle of the conveyor 41 is large, the inclined portion of the conveyor 41 is provided. The load collapses at 41B, and quantitative supply is not possible. In particular, the transport state becomes unstable when handling a transported object M having unstable properties such as waste such as waste plastic or shredder dust.
Further, when the amount of the conveyed product M supplied to the tail side is supplied to a specified amount or more (as it exceeds the rotation shaft 42), the conveyed product M is slanted to the head side obliquely upward by the scraper 53. It is sent and the layer thickness becomes unstable.

Furthermore, when the conveyed product M is waste, if foreign matter such as a wire mixed in the waste is caught in the scraper 53 of the rotating drum 43 and rotated as it is, the foreign matter becomes complicated on the scraper 53. In addition to being overloaded, the operation may be stopped and the device may be damaged. This fixed quantity supply device is provided with an elevating mechanism 50 for the rotary drum 43, which is for adjusting the layer thickness. In order to move the rotary drum 43 up and down, the adjusting screw 49 is loosened / tightened, and a slider. A series of operations such as movement of 48 and adjustment of the tensioner 51 are required. Therefore, even when the foreign object falls into a state where it entangles with the scraping plate 53, the rotary drum 43 cannot be urgently retracted.
Japanese Utility Model Publication No. 61-41133

  The present invention solves the above-mentioned problem in the conventional quantitative supply apparatus for powder and granular materials, and can supply a fixed quantity even if the transported property is not stable, such as waste, and the load collapses even if the conveyor has a large inclination angle. An object of the present invention is to provide an apparatus for quantitatively supplying a granular material that can prevent the apparatus from being damaged due to the entanglement of the foreign matter with the scraper.

In the present invention, in the transport facility for transporting the granular material supplied from the hopper by a conveyor having a horizontal portion and an inclined portion, the layer thickness regulating means and the consolidation are provided downstream of the granular material supply position of the horizontal portion of the conveyor. The above-mentioned problems are solved by providing the means in order.
In the powder and granular supply device of the present invention, the granular material supplied from the hopper is first regulated on the conveyor by the layer thickness regulating means and then consolidated by the compacting means. It is possible to quantitatively supply the conveyed product to the next process without being influenced by the properties of the conveyor and even on a steeply inclined conveyor.

  The compaction means is a compaction roller in which compaction blades are arranged on a roller body, and the rotational direction of the compaction roller is forward with respect to the conveying direction of the conveyor, and the peripheral speed of the blade portion of the compaction roller is the speed of the conveyor Is equal to, the local compaction state is formed on the conveyed product at a predetermined interval at the blade portion, so that the conveyed product is separated from the conveyor when being fed from the head side to the next process. Will be better. Further, since the peripheral speed of the blade portion of the compaction roller is equal to the speed of the conveyor, the once restricted layer thickness is not disturbed.

A moving means that enables the compaction roller to move in the vertical direction and a load detection means that detects the rotational load of the compaction roller are provided, and when the load detection means detects an overload, the compaction roller is retracted upward and rotated in the reverse direction. Even if a foreign object such as a wire is caught in the blade, it is removed from the blade before the foreign object is entangled in a complicated manner, so that the overload can be instantly eliminated and the apparatus can be prevented from being damaged.
If the conveyor is a bread conveyor, it can withstand a high pressing force as compared with the belt conveyor, so that the thickness of the conveyed product can be effectively increased.

  The powder and particle quantity supply device of the present invention can supply a fixed quantity even for a transported product with unstable properties such as waste, and does not collapse even if the conveyor has a large inclination angle. This can prevent the device from being damaged.

FIG. 1 is an overall configuration diagram of a transport facility provided with a powder and granular material supply device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. FIG.
The transport facility 1 is a facility for putting waste such as waste plastic and shredder dust into a melting furnace (not shown), a pan conveyor 2 for transporting waste to the melting furnace, and storing waste. A hopper 4 supplied to the bread conveyor 2, a layer thickness regulating means 5 for regulating the layer thickness of the waste supplied to the bread conveyor 2, a compacting means 7 for compacting the waste, and a head part of the bread conveyor 2 to the melting furnace A rotary valve 18 that inputs waste and a main frame 3 that supports these devices are provided.

The bread conveyor 2 is held by a conveyor frame 3A fixed to the main frame 3. The tail side that receives the supply of waste under the hopper 4 is a horizontal portion 2A, and the head side is an inclined portion 2B. On the downstream side of the waste supply position of the horizontal portion 2A of the bread conveyor 2, the layer thickness regulating means 5 and the compacting means 7 are arranged at a predetermined interval.
As shown in FIG. 2, the hopper 4 is a box having an inverted trapezoidal shape at the bottom and a square shape at the top, and a chute 4 </ b> A that guides waste to the layer thickness regulating means 5 is provided on the front wall surface. .

The layer thickness regulating means 5 is composed of regulating pipes 6 that are aligned in the direction perpendicular to the conveying direction of the bread conveyor 2 (hereinafter referred to as the width direction) and the axis direction, and are provided in parallel in the upper stage and four in the lower stage. The restriction pipe 6 is detachably held between the left and right main frames 3.
The compacting unit 7 is provided on the downstream side of the layer thickness regulating unit 5 and includes a compacting roller 8 and a moving unit 14. The compaction roller 8 is directly connected to one end of a rotation shaft 9 provided in the width direction, a roller body 10 that rotates about the rotation shaft 9, a compaction blade 11 that is disposed on the outer periphery of the roller body 10 at equal intervals, and the rotation shaft 9. It comprises a hydraulic drive motor 12 and a torque arm 13 that holds the drive motor 12 so as to be movable up and down. A guide 13 </ b> A of the torque arm 13 is provided on the main frame 3.

The rotation direction of the compaction roller 8 is the forward direction (the upper clockwise direction in FIG. 3) with respect to the transport direction of the bread conveyor 2, and the peripheral speed of the compaction blade 11 and the transport speed of the bread conveyor 2 are the same. Number is set.
The moving means 14 includes a slide cylinder 15 and a slide guide 16. A bearing block (not shown) of the rotating shaft 9 is fixed to the rod tip of the slide cylinder 15, and the other end of the slide cylinder 14 is attached to the main frame 3. . The slide guide 16 is provided on the conveyor frame 3A.

The drive motor 12 is provided with a load detector (not shown) (for example, a pressure sensor). When the rotational load of the compaction roller 8 exceeds a predetermined value, the slide cylinder 15 is contracted to move the compaction roller 8 through a moving distance. It is controlled to retract upward by S and to rotate in the direction opposite to the normal rotation direction (counterclockwise in FIG. 3).
A scattering prevention cover 17 for preventing dust from scattering is provided above the low lab day 10.
The rotary valve 18 is provided in the head part of the bread conveyor 2, and throws waste into the melting furnace so that the gas in the latter melting furnace is not released.

  In the transport facility 1, the waste that is supplied non-quantitatively from the hopper 4 to the bread conveyor 2 is regulated to a certain layer thickness by the regulation pipe 6. Since the restriction pipe 6 is only detachably held between the left and right main frames 3, the restoration work can be easily performed even if foreign matter or the like is entangled. The layer thickness of the waste regulated by the regulation pipe 6 is set to be approximately the same as the height of the roller body 10 of the compacting roller 8 or slightly higher than the thickness of the waste.

  The compaction roller 8 rotates in the forward direction with respect to the transport direction of the bread conveyor 2 and so that the peripheral speed of the compaction blade 11 and the transport speed of the bread conveyor 2 are equal. The compaction blade 11 is compacted between the transport surface 2C of the bread conveyor 2 and the compaction blade 11 with an interval corresponding to the pitch of the compaction blade 11. The consolidated waste is fixed on the conveying surface 2C of the bread conveyor 2, and is conveyed to the inclined portion 2B of the bread conveyor 2 while holding the non-consolidated portion only restricted by the restriction pipe 6 sandwiched between the compressed portions. Going to be.

Therefore, the inclined portion 2B of the bread conveyor 2 can be stably conveyed even with an unstable conveyance such as waste. Moreover, since the conveyed product with a small angle of repose can be stably conveyed with the bread conveyor 2 which has the inclination part 2B of a steep angle, the freedom degree of the layout of an installation also improves.
Compared with the case where the whole of the conveyed product is consolidated because the compacted part has a constant interval and a narrow range, it is conveyed when waste is supplied to the rotary valve 18 from the head side of the bread conveyor 2. The distance from the surface 2C is much better. Further, since the compaction roller 8 actually performs compaction only in the compaction blade 11 portion, the torque of the drive motor 12 can be small.

When a foreign matter such as a wire mixed in waste is caught in the compaction blade 11, the load detection means provided in the drive motor 12 detects an overload state, and the slide cylinder 15 is contracted to move the compaction roller 8 through a moving distance. The roller body 10 of the compaction roller 8 is reversely rotated at the same time by retreating by S. Therefore, foreign matter does not get entangled with the compacting blade 11, so that the overload state can be eliminated and the apparatus can be prevented from being damaged.
Compared to a belt conveyor, the bread conveyor 2 has a structure suitable for receiving the force applied from above, which is convenient for forming a compacted state on the conveyed product.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram of the conveyance installation provided with the fixed supply apparatus of the granular material which is one Embodiment of this invention. It is the sectional view on the AA line of FIG. It is a principal part enlarged view of a fixed quantity supply apparatus. It is a block diagram of the conventional quantitative supply apparatus of a granular material. It is a block diagram of the raising / lowering mechanism of the rotating drum of the conventional quantitative supply apparatus of a granular material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyance equipment 2 Pan conveyor 2A Horizontal part 2B Inclined part 2C Conveying surface 3 Main frame 3A Conveyor frame 4 Hopper 4A Chute 5 Layer thickness regulation means 6 Regulation pipe 7 Consolidation means 8 Consolidation roller 9 Rotating shaft 10 Low lab day 11 Consolidation blade 12 Drive motor 13 Torque arm 14 Moving means 15 Slide cylinder 16 Slide guide 17 Splash prevention cover 18 Rotary valve S Moving distance

Claims (2)

In the transport facility for transporting the granular material supplied from the hopper by a conveyor having a horizontal portion and an inclined portion,
A layer thickness regulating means and a compacting means are provided in this order on the downstream side of the granular material supply position of the horizontal portion of the conveyor ,
The compaction means is a compaction roller in which compaction blades are arranged on a roller body, the rotation direction of the compaction roller is forward with respect to the conveying direction of the conveyor, and the peripheral speed of the blade portion of the compaction roller is Equal to the speed of the conveyor,
A moving means for moving the compaction roller in the vertical direction and a load detection means for detecting a rotational load of the compaction roller are provided, and the compaction roller is retracted upward when the load detection means detects an overload. And supplying it in a reverse direction . 2. The apparatus for quantitatively supplying powder particles according to claim 1 , wherein the conveyor is a bread conveyor .

Images