JP2544706Y2 - Powder material transfer device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder and granular material transfer device applied to a facility for transferring dry ash generated after coal combustion in a boiler or the like to a storage unit for storage.

[0002]

2. Description of the Related Art In general, in a transfer apparatus of this type, for example, an apparatus for transferring dry ash, dry ash conveyed in a substantially horizontal direction by a belt conveyor as an upper conveyor is shot from a head portion of the belt conveyor. Fall through
Was, and is configured to transit conveyed by directly supplied to the belt conveyor as a lower conveyor therebelow.

However, in this case, when dry ash falls onto the chute from the head portion of the upper belt conveyor, air is sucked into the chute, and a flushing phenomenon occurs due to the properties of the dry ash such as fluidity and jet flow. easy rather, hardly transferred efficiently to the lower belt conveyor, also there is a problem that said that dispensing of many scattered to the surroundings granule is difficult.

For this reason, conventionally, as shown in FIG.
A chute 10 for dropping dry ash W from the head of the upper belt conveyor 101 toward the lower belt conveyor 102
3, a hopper 104 is provided below, and a rotating blade 105 is disposed in the hopper 104 (see, for example, JP-A-1-74289 and JP-A-3-124611). In this one,
Once the dry ash W is temporarily stored in the hopper 104, the mixing of air is reduced, and the falling distance from the rotating blades 105 is also reduced, so that the above-mentioned flushing phenomenon can be suppressed. Quantitative supply of dry ash W becomes possible.

[0005]

However, in the conventional granular material conveying apparatus having the above-described structure, although the flushing phenomenon can be suppressed by the rotating blades 105 and the like, only one rotating blade 105 is connected to the lower belt conveyor. Since it is configured to rotate around the axis along the width direction of the dry belt 102, it is difficult for the dry ash W fed by the rotating blades 105 to collect at the center of the lower belt conveyor 102 in the width direction, and is biased toward the minus end in the width direction. If the lower belt conveyor 102 is loaded, the lower belt conveyor 102 may be unloaded, which may hinder the transport operation. This is the same as that of the Japanese Utility Model Application
The powder feed rotary feeder and discharge device disclosed in JP-A-33-33 and JP-A-5-238559 also have substantially the same problems.

The present invention has been made in order to solve the above-mentioned problem, and it is possible to suppress the flushing phenomenon of the granular material and to supply the powder at a constant rate. It is an object of the present invention to provide a powdery and granular material transfer device that can perform the method.

[0007]

In order to achieve the above object, the present invention provides an apparatus for transporting granular material, comprising: an upper conveyor for transporting the granular material in a substantially horizontal direction; A hopper that receives the granular material through a chute, and a lower conveyor that is disposed below the hopper and conveys the granular material in a substantially horizontal direction,
In granular material transport apparatus and a granule feeding mechanism forcibly feeds the pooled granular material in the hopper to the hopper outlet, the powder or granular material feeding mechanism, opening out in said hopper
And is output Repetitive that having a tapered outer peripheral surface of which consists of both sides in the axial direction along the width direction of the upper Symbol lower conveyor and gradually next large diameter toward the central portion the roller is disposed in, this feeding roller Shaft circumference
And a rotation drive device for rotating the Ri, the lower con
Apply a larger amount of powder at the center of the bear than at both ends in the width direction.
It is characterized by being configured to be fed out .

[0008]

According to the invention, the outlet side in the hopper is located at the center from both sides in the axial direction along the width direction of the lower conveyor.
Since towards and is provided with a feeding roller having a tapered outer peripheral surface of which gradually becomes large diameter, in many central portion than at both ends in the width direction of the feeding down <br/> unit conveyor Ri by the rotation of the roller Is supplied, and the single-load state of the lower conveyor can be avoided. Further, the feeding roller, so gradually becomes large diameter toward the both ends of the axial direction can be increased can be smaller sealing surface at both ends thereof, and the sealing effect.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 are a rear view and a side sectional view, respectively, showing a portion of a granular material conveying device according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an upper belt conveyor serving as an upper conveyor for transporting powders W such as dry ash in a substantially horizontal direction, and a pulley 3 supported by a frame 2;
A plurality of guide rollers 4; an endless belt 5 supported by these pulleys 3 and guide rollers 4;
, And the endless belt 5 is supported such that both ends are at a higher level than the center in the width direction.

Reference numeral 7 denotes a chute for dropping the granular material W from the head portion of the belt conveyor 1 downward, and reference numeral 8 denotes a hopper for receiving the granular material W via the chute 7. Below the outlet 8a of the hopper 8, there is arranged a lower belt conveyor 9 as a lower conveyor for receiving the granular material W and conveying it in a substantially horizontal direction. The lower belt conveyor 9 includes, for example, a pulley 11 supported by a frame 10, a plurality of guide rollers 12, an endless belt 13 supported by the pulley 11, the guide roller 12, and the like, a snap roller 14, and the like. Both ends are supported at a higher level than the center in the width direction. Reference numeral 15 denotes a skirt portion provided from the outlet 8a side of the hopper 8 along the longitudinal direction of the lower belt conveyor 9.

[0011] the outlet 8a of the hopper 8 is granular material feeding mechanism 16 for feeding the granular material W stored in the hot <br/> path within 8 to forcibly downward is arranged . More specifically, the powder and granular material feeding mechanism 16 is configured as follows. Reference numeral 31 denotes a feeding roller which is driven to rotate around the axis of the lower belt conveyor 9 in the width direction, and the outer peripheral surface 31d of which extends from both ends 31b and 31c in the axial direction to the central portion 31.
It is formed in a tapered shape whose diameter gradually increases toward a, and the entire shape is a ball of an abacus. Reference numeral 20 denotes a rotation driving device for the feeding roller 31, and the motor 21 and the chain transmission 2
2 and the like, and the feeding roller 31 has a rotating shaft 3
2 together with the rotary drive device 20 that drives the drive unit 2. Reference numeral 23 denotes a dust collecting portion attached to the upper wall of the chute 7.

In the conveying device having the above-described structure, the granular material W conveyed by the upper belt conveyor 1 falls from the head portion thereof through the chute 7 and is once degassed by being temporarily stored in the hopper 8. Since the drop distance to the lower belt conveyor 9 is shortened by the feeding roller 31,
The flushing phenomenon of the granular material W is suppressed, and the scattering of the granular material W is less likely to occur. In addition, the rotation of the feed roller 31 allows the granular material W to be stably supplied to the lower belt conveyor 9 by a constant amount. In particular, the outer circumferential surface 31d of the feeding roller 31 toward the axial direction of the central portion 31a
Since the diameter gradually increases, for example, the feeding roller 3
The length that the outer peripheral surface of the central portion 31a travels during one rotation of the shaft 1 is larger than the length that the outer peripheral surfaces of the both ends 31b and 31c travel, and is more centrally located than both end portions in the width direction of the lower belt conveyor 9. Of the lower belt conveyor 9 is less likely to occur in a single-load state. Further, the feed roller 3
Since the diameter is gradually reduced toward both ends in the axial direction of 1, the sealing surface at this portion is reduced, and the sealing structure is simplified. The outer peripheral surface 31d of the feed roller 31 is not limited to the linear tapered surface as described above, but may be a curved tapered surface.

[0013]

As described above, according to the present invention, a hopper is provided between the upper conveyor and the lower conveyor to temporarily store and deaerate the powder and granules, while the lower conveyor is provided at the outlet side of the hopper. Because the feeding roller having a tapered outer peripheral surface whose diameter gradually increases from both sides in the axial direction along the width direction toward the center side is rotated, the powder and granules are moved to the widthwise central portion of the lower conveyor. as a side lot can be supplied, thus suppressing the piece loading of the lower conveyor it is possible to perform the conveyance was cheap boss, gradually toward the axially opposite ends of the feeding roller
Since the next diameter is small, the sealing surface at this part is small
Thus, the sealing structure can be simplified.

[Brief description of the drawings]

FIG. 1 is a partially cutaway rear view showing a granular material conveying device according to an embodiment of the present invention.

FIG. 2 is a side cross-sectional view showing the granular material transport device in the embodiment.

FIG. 3 is a schematic side view showing a conventional granular material transport device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Upper conveyor 7 Chute 8 Hopper 8a Exit of hopper 9 Lower conveyor 16 Powder material feeding mechanism 20 Rotary driving device 31 Feeding roller 31a Central part of feeding roller 31b One end of feeding roller 31c The other end of feeding roller 31d Outer peripheral surface W

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) creator Susumu Sato 1-23-1, Shinkawa, Chuo-ku, Tokyo Nisshin Plant Engineering Co., Ltd. (72) creator Takao Hemi 1-23-1, Shinkawa, Chuo-ku, Tokyo Nisshin Plant Engineering Co., Ltd. (72) Inventor Futa Makino 1-23-1, Shinkawa, Chuo-ku, Tokyo Nisshin Plant Engineering Co., Ltd. (72) Junji Sato 1-23-1, Shinkawa, Chuo-ku, Tokyo Nisshin Plant Engineering Co., Ltd. (56) References JP-A-5-238559 (JP, A) JP-A-58-100031 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] An upper conveyor for transporting powders in a substantially horizontal direction, a hopper for receiving powders falling from a head of the upper conveyor via a chute, and a hopper disposed below the hopper. Granular material transport device, comprising: a lower conveyor for transporting the granular material substantially in a horizontal direction; and a granular material feeding mechanism for forcibly feeding the granular material stored in the hopper to the hopper outlet side. In the above,
Out mechanism toward the central portion from both sides in the axial direction along the width direction of the disposed exit by the upper Symbol bottom conveyor within the hopper
Gradual and Repetitive out rollers that have a tapered outer peripheral surface of the next larger diameter, and a rotation drive device for rotating the feeding roller about the axis, than the width direction end sides of the lower conveyor me
A feeding unit for feeding a large amount of powder to the central part .