JPH07206134A - Stuck load stripping device for belt conveyor - Google Patents

Abstract

PURPOSE:To forcibly strip loads stuck to the loading surface of a belt by providing two striking rollers having projections on their outer peripheries and rotating while suitably abutting on the back face of the belt between return rollers, on the return side of a belt conveyor, and allowing the belt supported on the return rollers to be vibrated or deformed. CONSTITUTION:Two striking rollers 13, 14, each of which has projections 12 on the outer periphery, are provided on the return side 11 of a belt conveyor, and arranged on the opposite side of a belt 16 respectively in front and rear sides of a return roller 15a in the belt travelling direction A. With the striking rollers 13, 14, the outer peripheries are brought into frictional contact with the belt 16 travelling on the return side to be rotated in the same direction, and simultaneously with this, the projections 12 periodically strike the back face 22 of the belt 16 to vibrate or deform the belt by a volume equivalent to the projected length, and thus strip fine coal C adhered to the loading surface 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhering load separating device provided on a belt conveyor for conveying a granular load such as pulverized coal.

[0002]

2. Description of the Related Art As shown in FIG. 2, a belt conveyor 1 for transporting pulverized coal provided in a coal-fired power plant or the like uses a girder 2 having a truss structure, for example, from a coal storage tank 3 to a hopper 4 via a transfer section 5. Is extended, and the building 6 and the pillars 7 are constructed so as to be inclined so that the head side becomes higher. At the position of the head pulley 8 of the belt conveyor 1, a water jet nozzle, a brush, or the like for dropping the pulverized coal remaining on the belt that is not discharged at the conveying end and is removed is provided.

[0003]

By the way, the dust coal adhered to the belt cannot be completely dropped by the water jet nozzle or the brush, so that it tends to remain in a thin film on the mounting surface. The adhered pulverized coal may be peeled off from the belt and fall to the ground due to contact with the return roller or the like during the return. Therefore, conventionally, the girder 2 is provided with a fall prevention plate that receives the pulverized coal. However, since lignite deposits accumulate on this fall prevention plate as the transportation progresses, it is necessary for the worker to climb the girder 2 on a regular basis and collect the lignite, which is a difficult and difficult task. there were.

Therefore, the present invention was devised to newly provide an adhered load separating device capable of sufficiently separating the load adhered to the belt so that it does not remain on the return side.

[0005]

According to the present invention, a striking roller is provided on the return side of a belt conveyor, which has a projecting portion on the outer circumference and rotates between the return rollers while appropriately abutting against the back surface of the belt. .

[0006]

With the above structure, the striking roller vibrates or deforms the belt supported by the return roller by the intermittent striking by the projecting portion to forcibly separate the load attached to the mounting surface of the belt.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of an adhered load separating device for a belt conveyor according to the present invention, which is applied to a belt conveyor for conveying pulverized coal. This adhered load separating device is provided on the return side 11 of the belt conveyor.
The two impact rollers 13 having the protrusions 12 on the outer periphery,
14 is provided and configured.

Return rollers 15 are arranged side by side at a predetermined interval on the return side 11 and support a belt 16 folded from a head pulley (not shown) so that the belt 16 can run with the mounting surface 17 facing down. ing. One of the return rollers 15a is located above the level L of the other return roller 15b by a predetermined height h, and the impact rollers 13 and 14 are the return rollers 15a.
Before and after the belt running direction A, the belt 16 is installed on the opposite side (on the side of the belt back surface 22) with the belt 16 interposed therebetween.

The upstream first striking roller 13 is composed of a cylindrical base circular portion 18 and two types of protrusions 12a and 12b. The protrusions 12a and 12b extend radially, and four protrusions 12a that are elongated and protrusions 12b that are shorter than the protrusions 12a and 12b are arranged alternately and at equal intervals, for a total of four protrusions 12a and 12b. The protruding portion 12c provided on the second impact roller 14 on the downstream side is
The protrusion length is intermediate between the two kinds of protrusions 12a and 12b, and a total of three protrusions 12a and 12b are formed at equal radial intervals from the base circle portion 19. The shape of these protruding portions 12 may be a thick plate shape that is continuous in the axial direction, or a prismatic shape that is independent with an interval in the axial direction. Further, the rotation shafts 20 and 21 of the respective impact rollers 13 and 14 are rotatably supported by a girder (not shown) and of a belt (indicated by a chain double-dashed line 16a in the figure) when supported only by the return roller 15. The back surface 22 is held at a position where the base circle portions 18, 19 are in contact with each other. That is, each impact roller 13, 1
No. 4 rotates in the same direction (indicated by arrow B in the figure) due to frictional contact of the outer circumference of the belt 16 on the return side while the protrusion 12 periodically hits the back surface 22 of the belt 16, The pulverized coal C attached to the mounting surface 17 is peeled off by vibrating or deforming by an amount corresponding to the protruding length. The tip 23 of the projecting portion 12 has the abutting belt 1.
The back surface 22 of 6 is formed of a resin material or the like having appropriate elasticity so as not to damage the back surface 22.

Below the upper return roller 15a, pulverized coal C peeled off by the impact rollers 13 and 14 is dropped.
A litter recovery hopper 24 is provided for receiving the coal. The lignite recovery hopper 24 has an area corresponding to the range of the installation locations of the impact rollers 13 and 14 and opens upward, and is formed in a downward constriction, and the lignite C at the lower end (not shown).
₀ can be stored temporarily.

Next, the operation of this embodiment will be described.

When the pulverized coal C is conveyed on the carrier side by the belt traveling, the striking rollers 13 and 14 are contact-rotated by the traveling of the return side belt 16, and at the same time, the upper return roller 15a and the return rollers 15b before and after the upper return roller 15a. The back surface 22 of the belt 16 which is moderately stretched in between is hit in each cycle. As a result, the pulverized coal C remaining without being removed at the transport end vibrates so that the belt 16 bends in the vicinity of the upper return roller 15a,
It is forcibly separated from the mounting surface 17. The litter coal C _{0 that} has fallen from the belt 16 is collected in the litter collection hopper 24, temporarily stored, and then carried out by a separate truck or the like to be used together with the pulverized coal C that has been properly transported.

As described above, the impact rollers 13 and 14 having the protrusions 12 are provided on the side opposite to the return roller 15,
Since the periodic impact is applied from the back surface 22 of the belt 16, the pulverized coal C adhering to the mounting surface 17 of the belt 16 can be sufficiently peeled and collected without any residue. That is, the amount of adhering pulverized coal C that may fall is extremely small even if it remains, and it is possible to completely abolish the previously required coal extinguishing prevention plate, or even if the coal extinguishing prevention plate is installed just in case, it is harmful. It is possible to abolish the manual work of lignite recovery, which was a dangerous and heavy work, because it does not accumulate in the area, and safety is improved and the number of personnel is reduced. Furthermore, by installing this adhering load separating device near the head pulley, it is possible to omit the conventional brush and water jet nozzle, and the water supply / drainage system is not required, thus improving the surrounding environment and simplifying the equipment. Is done.

Further, in this embodiment, the impact roller 1
Since the belt running on the return side is used for the rotational driving force of the rollers 3, 14, it is not necessary to separately provide a driving source for the impact rollers 13, 14, and an energy saving configuration can be achieved. Further, since two striking rollers 13 and 14 having two different protrusions 12 having different lengths and phases are provided, forced vibration or deformation of the belt 16 becomes complicated and rich in variations, and various modes of adhesion degree and distribution of pulverized coal are obtained. Can adapt to.

The structure of the striking roller is not limited to this embodiment, and the number of projecting portions, the projecting length, etc. should be set according to the scale of the belt conveyor. The impact roller is not limited to one having a radially extending protrusion, and may be an impact roller having an eccentric or polygonal cross section. Further, the number of impact rollers installed is not limited to two, and may be three or more or one,
It may be placed anywhere unless it is directly above the return roller. Then, a drive source for the striking roller may be separately provided so that the rotation direction or the rotation timing can be operated arbitrarily. Further, although the belt conveyor for conveying pulverized coal is used in the present embodiment, the present invention can be naturally applied to a belt conveyor for conveying other powdery and granular loads.

[0017]

In summary, according to the present invention, the load attached to the belt can be sufficiently peeled off, and the load can be prevented from dropping during the return.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an adhered load removing device for a belt conveyor according to the present invention.

FIG. 2 is a side view showing the entire belt conveyor.

[Explanation of symbols]

 11 Return Side of Belt Conveyor 12 Projection Part 13, 14 Impact Roller 15 Return Roller 16 Belt 22 Back Side

Claims (1)

[Claims] 1. A detachment of an adhered load of a belt conveyor, characterized in that, on the return side of the belt conveyor, there is provided a striking roller having a projecting portion on the outer circumference and rotating between the return rollers while appropriately abutting against the back surface of the belt. apparatus.