JP3734861B2 - Dust scattering prevention device for bulk conveyor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dust countermeasure means applied to either or both of a loading part and an unloading part in a pipe conveyor that rolls a belt and conveys a bulk material.
[0002]
[Prior art]
For belt conveyors that transport loose materials such as gravel, coal, ore, grain, feed, and wood chips, instead of using belts with flanges or troughs, pipes with overlapping edges on both sides are greatly improved in transport capacity. Pipe conveyors that have been designed to be increased to a long time have been known for a long time (see Japanese Patent Publication No. 43-22698), and in addition to the increase in transportation capacity described above, It has the advantage that it can be used without worrying about wind and rain.
[0003]
[Problems to be solved by the invention]
The above-mentioned pipe conveyor receives the bulk material falling on the chute at the loading portion and discharges the bulk material to the chute at the unloading portion, so that it is expanded on the tail side which is the loading portion and the head side which is the unloading portion. Therefore, on the tail side, the loose material falling from the chute to the belt causes dust to rise, and on the head side, the loose matter released from the belt to the chute causes dust to rise. There are concerns that it will float at a concentration, polluting the environment and harming the health of nearby workers.
[0004]
In general, the tail chute is provided with a skirt for stabilizing loose objects falling on the belt, and this skirt can suppress dust scattering to some extent. However, even if the length of the skirt is increased in anticipation of the dust scattering suppression effect, the pipe conveyor begins to roll immediately after the belt is reversed by the tail pulley, so that the skirt width is smaller than the distance between the edges of the belt. It is impossible to eliminate dust scattering.
[0005]
On the other hand, the head side does not have the skirt as described above, and even if the chute inlet portion is formed so as to cover the head pulley and the scattering of dust generated inside the chute is suppressed, the belt can be expanded. It is not possible to prevent internal dust from being scattered.
[0006]
In the background of the present invention, the present invention prevents the dust generated by the roses falling from the chute from the chute on the tail side of the pipe conveyor from scattering to the surroundings, or by expanding the belt on the head side. It is made as a subject to prevent the dust generated in the above from being scattered around.
[0007]
[Means for Solving the Problems]
That is, as a countermeasure against dust on the tail side, the present invention includes left and right side walls extending in the running direction of the belt with the rear end connected to a chute for dropping loose articles onto the belt, and a top wall blocking the top between them. A sealing strip that includes a skirt structure, a sealing strip that is in contact with the belt provided along the left and right side walls, and a shielding member that is in contact with the belt by closing the openings at the front and rear ends of the skirt structure. Is arranged so as to be in contact with the inner surface in a section until the belt is rolled up to a state where it is rolled up, and in contact with the outer surface in a section until it is completely rolled up.
[0008]
As a result, the bulk material falling from the chute to the belt is wrapped in a belt that is rolled into a pipe shape through a space sealed by the skirt structure, the sealing strip, and the shielding member, and the dust generated from the bulk material is sealed space. And it is enclosed in a pipe-shaped belt and does not scatter around.
[0009]
Next, as a measure against dust on the head side, the present invention is based on the left and right side walls extending in the running direction of the belt, and the top wall blocking the top between them, the front end of which is connected to the chute for discharging the loose pieces of the belt. A skirt structure, a sealing strip provided along the left and right side walls and in contact with the belt, and a shielding member in contact with the belt by closing the rear end opening of the skirt structure. The belt was placed so as to contact the outer surface in the section from the rolled state to the expanded state, and to contact the inner surface in the section until the belt was fully expanded.
[0010]
As a result, even if dust encapsulated by the belt is expanded for releasing the bulk material, the dust enclosed by the belt is kept in the space surrounded by the skirt structure, the sealing strip, and the shielding member.
[0011]
In some cases, both tail side and head side dust countermeasures are applied to one pipe conveyor.
[0012]
Furthermore, on the tail side and the head side, a blocking member that divides the inner space of the skirt structure forward and backward is provided at the boundary between the contact section of the sealing strip on the inner surface of the belt and the contact section on the outer surface. As a result, the dust scattering prevention effect is further improved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 schematically shows an entire belt conveyor, which is arranged at a tail pulley 1 disposed at a rear end of an installation section and at a front end. An endless belt 3 is wound around the head pulley 2, and the belt has a flat shape around the two pulleys 1, 2. Then, it is rounded into a pipe shape through a trough shape by a focusing guide roller arranged at each inlet portion, travels while maintaining the pipe shape by a shape retaining roller, and is extended by a guide roller for extension arranged at each outlet portion. It circulates by repeating the movement that spreads flatly through the trough shape. Then, the bulk material, which is a transported material, falls from the hopper 7 through the chute 8 on the tail side to the beginning of the formation of the trough-shaped portion 4 of the belt 3 and is completely wrapped by the pipe-shaped portion 5 toward the head side. When the belt 3 is reversed by the head pulley 2, it is discharged to the chute 35.
[0014]
The tail-side chute 8 and the head-side chute 35 are connected to the dust countermeasure means of the present invention.
[0015]
First, the dust countermeasure means on the tail side is shown in the schematic plan view shown in FIG. 2 (A) and (B), (C), (D), (E), (F), (G), and (H). This will be described with reference to cross-sectional views of each part.
[0016]
In general, in a belt conveyor for carrying bulk goods, a skirt is provided for stabilizing the bulk material falling from the chute by the belt conveyor. In the present invention, the left and right side walls 12 connected to the side wall 10 of the chute 8 of the skirt and extending in the running direction of the belt 3 are used as the first side wall, and the trough-shaped portion is gradually rounded to narrow the opening width upward. The left and right second side walls 15, which are inserted into the front side 4 and have a gradually decreasing distance toward the front, are connected to the front end of the first side wall 12. Furthermore, the left and right third side walls 18 whose intervals gradually become narrower forward from the portion where the opening width of the trough-shaped portion 4 is considerably narrowed to the pipe-shaped portion 5 where the edge portions on both sides of the belt 3 overlap each other. The rear end was substantially aligned with the front end of the two side walls 15 and was installed above the outer surface of the belt 3.
[0017]
These first, second and third side walls 12, 15 and 18 are frames extending over the entire length of the installation section by attaching various pulleys and rollers for guiding the belt 3 or their supporting devices and other belt conveyor equipment. 40, and the top portion between them is releasably and airtightly sealed by the first, second and third top walls 13, 16, 19 and is a skirt structure comprising three body units 11, 14, 17 20 is constituted. The first top wall 13 is continuous with the top wall 9 and the second top wall 16 of the chute 8.
[0018]
As described above, the side wall 12 of the first structural unit 11 uses the skirt that stabilizes the bulk material as it is, and is made of rubber that is brought into contact with the upward surface that is the inner surface of the pipe-shaped portion 5 of the belt 3. A flexible strip 21 is attached. The first side wall 12 extends forward from the flexible strip 21, and is positioned on the outer side of the flexible strip 21 over its entire length, so that a flexible first sealing strip 22 made of rubber plate is used as the belt. 3 is attached in contact with the inner surface.
[0019]
Further, a flexible second sealing strip 24 made of a rubber plate is attached to the side wall 15 of the second structure unit 14 so as to be in contact with the inner surface of the belt 3 over the entire length thereof. A flexible third sealing strip 26 made of a rubber plate is attached to the side wall 18 of the unit 17 in contact with the outer surface of the belt 3 over its entire length.
[0020]
These sealing strips 22, 24, 26 are attached to the side walls 12, 15, 18 in an airtight and detachable manner over the entire length, and are made of a highly flexible rubber plate at the contact portion with the belt 3. 23, 25, and 27 are laminated so as to be in surface contact with the surfaces of both side edges at symmetrical positions sandwiching the center of the belt 3.
[0021]
Further, a shielding member 28 made of rubber plate is provided on the rear end surface of the first structure unit 11, and the lower end edge contacts the belt 3 to seal the rear end of the skirt structure 20. Furthermore, the rear end surface of the third structure unit 17 is a rubber plate blocking member having an arc-shaped lower end edge that matches the upper outer surface of the belt 3 at a portion where the opening width of the trough-shaped portion 4 is considerably narrow. A member 29 is provided to block the inner space of the skirt structure 20 in front and rear in contact with the belt 3, and the front end surface has an arc-shaped lower end edge that matches the upper outer surface of the pipe-shaped portion 5. A rubber plate shielding member 30 is provided and is in contact with the belt 3 to seal the front end of the skirt structure 20.
[0022]
The bulk falling from the hopper 7 through the chute 8 is communicated with the chute 8 until the belt on which the belt is placed is completely rounded into a pipe shape through the trough-shaped portion 4 and the skirt above it. It passes through a space surrounded by the structure 20, but this space is sealed by sealing strips 22, 24, 26, shielding members 28, 30, and a blocking member 29. Therefore, the dust generated by the falling of the bulk is not enclosed in the sealed space and scattered around.
[0023]
The blocking member 29 closes the gap between the second and third side walls 15 and 18 formed at the place where the second sealing strip 24 and the third sealing strip 26 are switched. Although this gap is narrow, it can be omitted. Further, the first side wall 12 may be provided for the present invention without using an existing skirt. In this case, the sealing strip 22 is also used for stabilizing the bulk material.
[0024]
Next, with respect to the dust countermeasure means on the head side, a schematic plan view shown in FIG. 3A and each part shown in (B), (C), (D), (E), (F), and (G) are shown. This will be described with reference to a cross-sectional view.
[0025]
This dust countermeasure means is basically the same as that on the tail side, and extends from a portion where the pipe-shaped portion 5 begins to expand to a portion where both side edges of the belt 3 are separated to a certain extent and become a trough-shaped portion 4 having a narrow opening width. Thus, left and right first side walls 42 whose intervals gradually increase toward the front are disposed above the outer surface of the belt 3. As a result, the left and right second side walls 45 whose intervals gradually increase toward the front are inserted over a portion where the opening width of the trough-shaped portion 4 becomes considerably large, and are installed on the inner surface of the belt 3. And the rear end of the second side wall 45 overlap each other with a gap. Further, left and right third side walls 48 parallel to each other are connected to the front end of the second side wall 45 by being inserted into the trough-shaped portion 4, and the front end is connected to the left and right side walls 36 of the bulk material discharge chute 35.
[0026]
These first, second and third side walls 42, 45, 48 are fixed to the frame 40, and the top between them is releasable by the first, second, third top walls 43, 46, 49 and A skirt structure 50 composed of three structure units 41, 44, 47 is configured to be airtightly closed. The third top wall 49 is continuous with the top wall 39 and the second top wall 46 of the chute 35.
[0027]
A flexible first sealing strip 51 made of a rubber plate is attached to the side wall 42 of the first structure unit 41 so as to contact the inner surface of the belt 3 over the entire length thereof. A flexible second and third sealing strips 53 and 55 made of rubber plate are attached to the side walls 45 and 48 of the structure units 44 and 47 in contact with the inner surface of the belt 3 over their entire length. It has been.
[0028]
These sealing strips 51, 53, 55 are attached to the side walls 42, 45, 48 in an airtight and detachable manner over the entire length, and a sealing member made of a highly flexible rubber plate at the contact portion with the belt 3. 52, 54, and 56 are laminated so as to be in surface contact with the surface of both side edges at symmetrical positions sandwiching the center line of the belt 3.
[0029]
Further, a rubber plate shielding member 58 having an arcuate lower end edge matching the upper outer peripheral surface of the pipe-shaped portion 5 is provided on the rear end surface of the first structure unit 41, and is in contact with the belt 3 to make a skirt The rear end of the structure 50 is sealed. Furthermore, a rubber plate blocking member 59 having an arc-shaped lower end edge matching the upper outer surface of the trough-shaped portion 4 is provided on the rear end surface of the second structure unit 44, and is in contact with the belt 3. A narrow gap between the first and second side walls 42 and 45 formed at the place where the one sealing strip 51 and the second sealing strip 53 are switched is closed.
[0030]
A rubber flexible band plate 60 is attached to the side wall 48 of the third structure unit 47 to prevent loose materials from collapsing as the belt 3 is expanded and to bite between the sealing strip 55 and the belt 3 due to vibration. ing. The strip 60 has the same rear end position as that of the sealing strip 55, is disposed on the inner side thereof, is in contact with the upward surface of the belt 3, and extends above the central axis of the head pulley 2. As a result, the bulk material is stably transported and is released to the chute 35 as it is.
[0031]
The head pulley 2 is made longer than the interval between the side walls 36 of the chute 35, and both end portions pass through the through holes 39 of the side walls 36, and these gaps are sealed by an annular seal member 61 attached to the side wall 36. ing.
[0032]
This is particularly effective when the head pulley 2 is not a driving pulley, and therefore the pulley drum is rotatably supported on a fixed shaft, and the bearing is easily exposed to dust atmosphere. The skirt structure 50 and the chute 35 are effective. The shielding member 58, the sealing strips 51, 53, 55, and the sealing member 61 form a sealed space that continues from the pipe-shaped portion 5, without enclosing dust generated from loose materials and scattering the surroundings. It can be discharged to the chute 35.
[0033]
In addition, when the skirt structure 50 is separated from the chute 35 without being continuous, the front end face is provided with a shielding member having a gap through which loose materials can pass to enclose dust generated during transportation by the belt 3. Can be kept.
[0034]
Of course, the dust countermeasure described above may be applied only to either the tail side or the head side depending on the situation of the installation location.
[0035]
【The invention's effect】
As described above, according to the present invention in which the loose material is not exposed to the atmosphere between the portion where the belt is expanded and the portion rounded into a pipe shape, the loose material falling on the belt on the tail side is generated. Dust to be generated or the dust generated inside by spreading the belt on the head side does not scatter to the surroundings, thereby preventing environmental contamination and bearing damage.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a pipe conveyor to which the present invention is applied.
FIG. 2 shows tail-side dust countermeasure means, (A) is a schematic plan view, (B), (C), (D), (E), (F), (G), ( H) is an enlarged partial sectional view of B, C, D, E, F, G, and H in (A).
FIG. 3 shows dust countermeasure means on the head side, (A) is a schematic plan view, (B), (C), (D), (E), (F), (G) are ( The expanded sectional fragmentary view in B, C, D, E, F, G of A).
[Explanation of symbols]
1 tail pulley, 2 head pulley, 3 belt, 4 trough-shaped part, 5 pipe-shaped part, 8,35 chute, 12, 15, 18, 42, 45, 48 side wall, 13, 16, 19, 43, 46, 49 Wall, 20, 50 skirt structure, 22, 24, 26, 51, 53, 55 sealing strip, 28, 30, 58 shielding member, 29, 59 shielding member,

Claims (5)

In a bulk conveyor for conveying bulk material, in which an endless belt is unrolled on the tail side to receive the bulk material falling from the chute and then travels to the head side in a wrapped state.
A skirt structure consisting of left and right side walls extending in the running direction of the belt with a rear end portion connected to the chute and a top wall blocking the top portion therebetween, and provided on the belt provided along the left and right side walls. A sealing strip brought into contact with each other and a shielding member that closes the front and rear openings of the skirt structure and is brought into contact with the belt;
The sealing strip is in contact with the inner surface in a section until the belt is rolled out from the spread state, and in contact with the outer surface in a section until the belt is completely rounded. An apparatus for preventing dust scattering, which is arranged. In a bulk carrier pipe conveyor where an endless belt wraps around a bulk material and is unrolled from the rolled state and discharges the bulk material to a chute when reversed by a head pulley;
A skirt structure comprising left and right side walls extending in the running direction of the belt with the front end connected to the chute and a top wall blocking the top between them, and provided along the left and right side walls to be in contact with the belt. And a sealing member that closes a rear end opening of the skirt structure and is brought into contact with the belt;
The sealing strip is in contact with the outer surface in a section until the belt is expanded from a state where the belt is rounded, and is in contact with an inner surface in a section until the belt is fully expanded. An apparatus for preventing dust scattering, which is arranged in An endless belt is unrolled on the tail side to receive the falling material falling from the chute, then wraps around the loose material, runs in a rolled state, and is unrolled again on the head side to release the loose material to the chute In transport pipe conveyors;
The skirt structure, sealing strip, and shielding member according to claim 1 disposed on the tail side, and the skirt structure, sealing strip, and shielding member according to claim 2, disposed on the head side. A dust scattering prevention device characterized by comprising: Before Symbol claim 1, 2 or 3 wherein the sealing strip disposed on the tail side is equipped with a blocking member for partitioning the front and rear inner space of the skirt assembly to the front end of the section in contact with the inner surface of the belt The dust scattering prevention apparatus described . Sealing strips disposed in front Symbol head side according to claim 2 or 3 an interior space equipped with blocking member partitioning before and after the skirt assembly to the rear end of the section in contact with the inner surface of the belt Dust scattering prevention device.

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