JPH09142665A - Belt conveyor for carrying powder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out powder without leaking outward by a simple device. SOLUTION: In this belt conveyor 1 for carrying powder, powder M supplied to a hopper 103 falls from a discharge port 3 provided on the bottom part of the hopper 103, and falls on the belt B of a belt conveyor BC through a closed passage 11 fitted to the underside of the discharge port 3. At this time, the closed passage 11 is intercepted from the outside by airtightness holding material 15 and a plurality of partition plates 27, and hence the powder does not leak outward. Further, because the lower part of the partition plate 27 is lifted by the powder itself when the powder is carried accompanying running of the belt B, airtightness of the closed passage 11 is held. The closed passage 11 is extended in the carrying direction on the upper side of the belt B, the interior is partitioned by the partition plates 27, and hence the pressure can be gradually adjusted. The quantity of carried powder is adjusted by the nearest partition plate 27 to the discharge port.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder convey belt conveyor device for conveying powder such as dust collected by a dust collector without leaking to the outside.

[0002]

2. Description of the Related Art Conventionally, a belt conveyer device for powder conveyance, particularly a dust collector hopper on the powder supply side having a negative pressure side, has a double gate type or a rotary valve type discharge device. It is generally used to maintain confidentiality.

Referring to FIG. 7, in a double-gate type belt conveyor device 101 for powder conveyance, an outer wall 105 surrounds a hopper 103 for dropping the powder M from a dust collector (not shown). Inside the passage 107, upper and lower movable seal blades 109U and 109L are provided so as to be hermetically sealed. Therefore, the upper and lower movable seal blades 109U, 109L
A room 111 is provided so as to be hermetically sealed.

The movable seal blades 109U, 109L
Is attached to a drive shaft 113 which is rotated by a drive device such as a cylinder (not shown).
The room 111 is opened and closed with the rotation of 13.

Upper and lower movable seal blades 109U, 109L
Are controlled to open and close alternately. Therefore, when the powder M is dropped, first, the lower movable seal blade 109L
With the above closed, the upper movable seal blade 109U is opened to drop the powder M into the chamber 111 (state shown by the solid line in FIG. 7). After that, the upper movable seal blade 109U is closed, and then the lower movable seal blade 109L is opened.
The powder M of No. 11 is dropped (state shown by the chain double-dashed line in FIG. 7).

Below the discharge port 115 under the hopper 103, a belt conveyor BC which is driven by a driving device (not shown) is provided, and the discharge port 11 under the hopper 103 is provided.
The powder M dropped from No. 5 is loaded on the belt B of the belt conveyor BC and carried out.

When the powder M in the chamber 111 is conveyed, the lower movable seal blade 109L is closed, the upper movable seal blade 109U is opened, and the powder M is stored again in the chamber 111 (indicated by the solid line in FIG. 7). State shown). By repeating this, the negative pressure of the hopper 103 is maintained and the powder M is conveyed.

[0008]

However, in such a conventional technique, the upper and lower movable seal blades 10 are provided.
A drive device for rotationally driving 9U and 109L, a control device for controlling the opening / closing timing, and the like are required, and there is a problem that the device becomes complicated.

Further, if a negative pressure is generated in the chamber 111 when the powder M is dropped from the chamber 111 to the belt conveyor BC, it becomes difficult to discharge the powder M, and the powder M is discharged to the chamber 111. Since the air pressure in the room 111 becomes high and the powder M is ejected from the gap of 109L together with the air, an air pressure adjusting device for adjusting the air pressure in the room 111 is required when operating the movable seal blades 109U and 109L, and the device is more complicated. There is a problem that becomes.

The object of the present invention has been made by paying attention to the above-mentioned conventional techniques, and provides a belt conveyor device for powder transport which can carry out powder without leaking to the outside with a simple device. Especially.

[0011]

In order to achieve the above object, a powder convey belt conveyor apparatus of the invention according to claim 1 is a dust collector hopper having a discharge port at the bottom for discharging powder. A sealed passage that is hermetically attached to the lower side of the discharge port and extends in the transport direction, a belt conveyor having a belt that rotates and travels in the transport direction below the sealed passage, and below the sealed passage. A plurality of partitions rotatably supported on the upper part of the airtightness maintaining member provided to maintain the airtightness between the belt conveyor and the belt conveyor so as to block the plurality of chambers that maintain the airtightness in the closed passage. It is characterized by being provided with a plate.

Therefore, the powder collected in the hopper of the dust collector falls from the discharge port at the bottom of the hopper, and drops on the belt of the belt conveyor through the closed passage installed below the discharge port. . At this time, since the closed passage is blocked from the outside by the airtight holding material and the plurality of partition plates, the powder does not leak to the outside. Further, while the powder is conveyed in the carry-out direction as the belt runs, at this time, the powder itself lifts and opens the lower part of the partition plate, so that the airtightness of the closed passage is maintained. This closed passage extends above the belt conveyor in the carrying direction, and since the inside is partitioned by a plurality of partition plates, if there is a pressure difference between the hopper and the outside, gradually increase the pressure as going in the carrying direction. The pressure can be reduced.

According to a second aspect of the present invention, there is provided a powder conveyer belt conveyor device characterized in that a convey amount control plate for adjusting a convey amount is provided at a position closest to the discharge port of the closed passage according to the first aspect. It is a thing.

Therefore, the amount of the powder carried out by the belt conveyor is adjusted by the carrying amount control plate which is provided closest to the discharge port of the closed passage.

According to a third aspect of the present invention, there is provided a belt conveyer apparatus for powder transfer, wherein the airtight cover of the closed passage according to the first aspect is provided at a position corresponding to a room partitioned by the partition plate.
It is characterized in that an inspection window is provided which is hermetically closed in a closed state.

Therefore, the inside of each room of the closed passage can be inspected from the inspection window, and when the closed passage is clogged with powder or the like, the inspection window can be opened for easy repair. Also,
The inspection window maintains the airtightness of the closed passage when the inspection window is closed.

According to a fourth aspect of the present invention, there is provided a belt conveyer device for powder transfer, wherein each partition plate provided in the closed passage of the first aspect is provided on a rotatable mounting shaft, and one end of the mounting shaft is aforesaid. It is characterized in that the airtight cover of the closed passage is penetrated, and an adjustable counterweight for adjusting the opening / closing force of the partition plate is provided at one end of the penetrating mounting shaft.

Therefore, the opening and closing force of the partition plate is adjusted by the counterweight provided at one end of the mounting shaft, so that the partition plate can be easily returned and the powder can be conveyed while being flattened.

According to a fifth aspect of the present invention, there is provided a belt conveyor device for powder transfer, wherein each partition plate according to claim 1 is composed of a plurality of strip-shaped plates extending in the longitudinal direction of the partition plate. Is.

Therefore, when the amount of powder as the material to be conveyed is small, the airtightness-maintaining ability can be raised by the difference in height of the powder on the belt conveyor in the lateral direction of the belt conveyor.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that parts common to those of the powder conveying belt conveyor device 101 described in the above-mentioned prior art are denoted by common reference numerals, and redundant description will be omitted.

FIG. 1 shows the entire powder-conveying belt conveyor device 1 according to the present invention. In this powder convey belt conveyor device 1, a quadrangular pyramid trapezoidal hopper 103 is provided downward, and a rectangular discharge port 3 is provided on the bottom surface of the hopper 103 so as to open downward.

Below the discharge port 3, a belt conveyor BC for powder transfer is provided. This belt conveyor BC is a very general belt conveyor, in which an endless belt B is wound between a head roller 5 and a tail roller 7, and a driving device (not shown) rotates the head roller 5 or the tail roller 7. The belt B is run by driving. Since the upper belt B traveling in the transport direction (lower left direction in FIG. 1) is movably supported by the plurality of carrier rollers 9, the powder M is borne on the belt B.
Even if it is placed, it can be carried out without bending.

Referring also to FIGS. 2, 3 and 4, below the discharge port 3, a closed passage 11 having a generally rectangular shape with an open lower surface extends in the conveying direction of the belt conveyor BC. It is attached in a hermetically sealed manner, and a large number of brackets 13 are provided on the outer periphery of the hermetically sealed passage 11.

A contact plate 15 made of rubber or the like as an airtight holding material is attached to the bracket 13 by a bolt 17 in order to maintain the airtightness between the airtight passage 11 and the belt conveyor BC. In addition, the airtight cover 11U of the closed passage 11
Two inspection windows 19, 19 are provided so as to be openable and closable, and the closed passage 11 is kept closed when the lid 21 is closed.

A transfer amount control blade 23 is fixedly provided inside the closed passage 11 at a position closest to the discharge port 3 so as to make the amount of the powder M carried out uniform. That is,
The carry amount control blade 23 is a belt conveyor BC.
Since the height is constant from the belt B, the amount of the powder M to be conveyed is kept constant by keeping the height of the powder M to be conveyed constant.

Movable seal blades 27, 27 as partition plates are provided at the center of the closed passage 11 and at the front position in the transport direction by a hinge 25 provided across the inner upper portion of the closed passage 11 so as to be rotatable. ing. The movable seal blades 27, 27 are provided on the belt conveyor B while the powder M is being conveyed.
Since it is pushed open by the powder M conveyed by C, the airtightness of the closed passage 11 is maintained. Further, a stopper 29 for preventing reverse movement is attached to the inside of the airtight cover 11U so that the stopper 29 hangs vertically when not being transported.

Therefore, the closed passage 11 includes the first chamber R1 below the discharge port 3 of the hopper 103, and the second chamber R2 in front of the first chamber R1.
It will have a third chamber R3.

Next, the operation of carrying the powder M by the above-mentioned powder carrying belt conveyor device 1 will be described.

The powder M supplied to the hopper 103 drops from the discharge port 3 of the hopper 103 and is placed on the belt B of the belt conveyor BC in the first chamber R1 of the closed passage 11. Since the belt B is running in the carrying direction, the powder M is carried forward.

In the first chamber R1, the amount of powder M transported by the transport amount control blade 23 is adjusted to prevent the powder M from being unloaded in a large amount at one time. Further, since the outer periphery of the closed passage 11 is closed from the outside by the rubber contact plate 15, even if the powder M falls from the discharge port 3 onto the belt B, it does not leak to the outside, and the air inflow from the outside. There is no.

As the belt B travels, the powder M passes under the conveyance amount control blade 23 and passes through the second chamber R2 in the front.
To be carried out. The second chamber R2 is separated from the third chamber R3 by the movable seal blade 27 provided on the front side,
The powder M on the belt B pushes up the movable seal blade 27, so that the powder M is conveyed to the third chamber R3. Similarly, the powder M is conveyed from the third chamber R3 to the outside.

From the above results, the discharge port 3 of the hopper 103
In this case, a closed passage 11 is provided which is shielded from the outside by a contact plate 15 made of rubber or the like, and a conveyance amount control blade 23 and two movable seal blades 27, 27 are provided in this closed passage 11 to maintain a closed state during the conveyance. When the powder M is conveyed from the hopper 103, it is possible to prevent the powder M from leaking or jetting to the outside, and to prevent the inflow of air from the outside. Further, a plurality of movable seal blades 27, which are partition plates, are provided, and the pressure gradually approaches the external pressure as it goes in the carrying direction, so that ejection of the powder M and backflow can be prevented.

Further, the two movable seal blades 27, 2
The stopper 7 is not opened / closed by the driving force, but is opened by the powder M to be conveyed. When the powder M is not on the belt B, the stopper 7 hangs down by its own weight to prevent reverse movement.
The whole device has a very simple structure.

FIGS. 5A and 5B show the movable seal blade 27 as a partition plate and other attachments.
5A and 5B, each movable seal blade 27 is provided in the airtight cover 11U, and the upper portion of the movable seal blade 27 is attached to the mounting shaft 31 extending in the width direction of the belt B. ing. This mounting shaft 3
1 includes a horizontal portion 31H and a vertical portion 31V integrated with the horizontal portion 31H. The vertical portion 31V is shown in FIG.
As shown in FIG. 5B, it is slightly inclined and bent toward the front side (left side in FIG. 5B).

The vertical portion 31V, which is one end of the mounting shaft 31, penetrates the airtight cover 11U, and the counterweight 33 is provided on the vertical portion 31V with a counterweight 33.
5 is adjustable.

With the above structure, when the powder M on the belt B is conveyed as shown by the arrow as shown in FIG. 5B, the movable seal blades 27 are moved to two points from the position indicated by the solid line. It will be conveyed while rotating to the position indicated by the chain line and keeping it airtight.

When the powder M has been conveyed, the movable seal blade 2
7 is smoothly returned from the position of the two-dot chain line to the position of the solid line by the action of the counterweight 33.

Therefore, by adjusting the counterweight 33 for adjusting the opening / closing force of the movable seal blade 27 to the vertical portion 31V which is one end of the mounting shaft 31 with the adjusting bolt 35, the return of the movable seal blade 27 can be improved. At the same time, the powder M can be made flat (uniform).

FIG. 6 shows another mounting of the movable seal blade 27 as a partition plate. In FIG. 6, a movable seal blade 27 attached to the airtight cover 11U.
A plurality of strip-shaped plates 37 each having an appropriate width are attached in close contact with each other in the width direction of the belt B.

With the above configuration, when the powder M as the material to be conveyed is small, the powder M on the belt B in the belt conveyor BC can have an airtight holding ability due to the height difference in the lateral direction of the belt B.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. That is, in the above-described embodiment, the two movable seal blades 27, 27
However, the number of the movable seal blades 27 may be three or more.

[0043]

As described above, in the powder convey belt conveyor apparatus according to the invention of claim 1, the powder supplied to the hopper of the dust collector falls from the discharge port at the bottom of the hopper, and the discharge port. It falls on the belt of the belt conveyor through the closed passage installed on the lower side of the. At this time, since the closed passage is blocked from the outside by the airtight holding material and the plurality of partition plates, it is necessary to prevent the powder from leaking outside when the pressure on the hopper side is high without providing a pressure adjusting device or the like. It is also possible to prevent backflow or difficulty in discharging when the pressure on the hopper side is low.

Further, while the powder is conveyed in the carry-out direction as the belt runs, at this time, since the powder itself lifts and opens the lower part of the partition plate, the airtightness of the closed passage is maintained by a simple structure. be able to.

Further, since this closed passage extends in the carrying direction above the belt conveyor and the inside is partitioned by a plurality of partition plates, it goes in the carrying direction when there is a pressure difference between the hopper and the outside. The pressure can be gradually reduced according to.

In the powder convey belt conveyor device according to the second aspect, the amount of powder carried out by the belt conveyor is adjusted by the convey amount control plate provided closest to the discharge port of the closed passage. It is possible to always carry out a certain amount stably.

In the powder conveyer belt conveyor device according to the third aspect, since the inside of each room of the closed passage can be inspected by opening the inspection plate, it is possible to easily inspect when the powder or the like is clogged inside. Can be repaired. Further, the airtightness of the closed passage can be maintained when the inspection plate is closed.

In the powder convey belt conveyor apparatus of the invention according to claim 4, each partition plate provided in the sealed passage is provided on the rotatable mounting shaft, and one end of the mounting shaft is provided with an airtight cover for the sealed passage. Since an adjustable counterweight that adjusts the opening / closing force of the partition plate is provided at one end of the mounting shaft that penetrates, the opening / closing force of the partition plate is adjusted by the counterweight provided at one end of the mounting shaft. Therefore, it is possible to improve the return of the partition plate, and it is possible to flatten and convey the powder.

In the powder convey belt conveyor device of the invention according to claim 5, since each partition plate is composed of a plurality of strip-shaped plates in the longitudinal direction of the partition plate, when the powder as the transport material is small. The airtightness retaining ability of the powder on the belt conveyor due to the height difference in the lateral direction of the belt conveyor can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire powder conveyor belt conveyor according to the present invention.

FIG. 2 is a plan view seen from a II-II direction in FIG.

FIG. 3 is a side view as viewed from a direction III in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5A is a perspective view showing the attachment of another partition plate,
(B) is a view on arrow B in (A).

FIG. 6 is a front view showing attachment of another partition plate.

FIG. 7 is a cross-sectional view showing a conventional double-gate type powder conveyor belt conveyor device.

[Explanation of symbols]

 1 Powder Conveyor Belt Conveyor Device 3 Discharge Port 11 Closed Passage 15 Rubber Cover Plate (Airtight Holding Material) 19 Inspection Window 23 Conveyance Amount Control Plate 27 Movable Seal Blade (Partition Plate) 103 Hopper M Powder B Belt BC Belt Conveyor R room

Claims (5)

[Claims] 1. A hopper of a dust collector having a discharge port at the bottom for discharging powder, a sealed passage that is hermetically attached to the lower side of the discharge port and extends in the conveying direction, and a lower side of the sealed passage. A belt conveyor having a belt that rotates in the transport direction, and an airtight holding member provided below the closed passage to maintain airtightness between the belt conveyor, and the airtightness in the closed passage. A belt conveyer device for powder transfer, comprising a plurality of partition plates pivotally supported at the upper part so as to be cut off from a plurality of held chambers. 2. The powder conveyer belt conveyor device according to claim 1, further comprising a conveyer amount control plate for adjusting a conveyer amount, which is provided at a position closest to the discharge port of the closed passage. 3. The powder according to claim 1, wherein an inspection window that is closed and sealed is provided at a position corresponding to a room partitioned by the partition plate in the airtight cover of the closed passage. Belt conveyor device for body transport. 4. Each partition plate provided in the sealed passage is provided on a rotatable mounting shaft, and one end of the mounting shaft is made to penetrate an airtight cover of the sealed passage, and one end of the penetrated mounting shaft is provided. The belt conveyor device for powder transfer according to claim 1, further comprising an adjustable counterweight for adjusting the opening / closing force of the partition plate. 5. The powder conveyer belt conveyor device according to claim 1, wherein each of the partition plates is composed of a plurality of strip-shaped plates extending in the longitudinal direction of the partition plate.