JPH11268836A - Fixed quantity belt conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve continuous fixed-quantity accuracy by eliminating unevenness of transportation in a continuous and fixed-quantity belt conveyor device for bulk materials. SOLUTION: In a fixed-quantity belt conveyor device, facing skirts 2, 2 inclined downward and toward the upper surface of an upper moving part 1' of a belt conveyor 1 are provided in the moving direction of the moving part 1', vertical plates 3, 3 are provided on both outer sides of the skirts 2, 2, a supplying hopper 4 is opened 4' between the facing skirts 2, 2, and horizontal leveling plates 5 perpendicular to the moving direction of the moving part 1' are provided on the terminal sides of the opening part 4'. The lower ends of the facing skirts 2, 2 are faced to each other with a small clearance (t) to the upper moving part 1', and the section of a moving bulk material 6 surrounded with the upper moving part 1', the facing skirts 2, 2 and the horizontal leveling plates 3 is formed into an inverted trapezoidal shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supplying a bulk material from a supply hopper to an upper surface of a belt conveyor, and performing a constant-quantity transport of the bulk material with little variation.

[0002]

2. Description of the Related Art Conventional belt feeders, belt conveyors and the like transport short distances like other types,
Many are variable speed quantitative formulas, but in the case of continuous metering,
Various corrections have been made for variance transport, but intermittent quantitative supply has not been widely used because variance transport cannot be corrected.

[0003] The belt feeder is used not only to shorten the belt conveyor but also to draw out a fixed amount while receiving material pressure from an opening at the lower part of the hopper.

[0004] That is, despite the following advantages, highly accurate continuous quantitative measurement cannot be performed due to uneven transportation. Intermittent metering has also not been used due to the aforementioned deficiencies. And in the industry where bulk materials are transported, variability transport is normal,
Under the Measurement Law, the measurement system used to be an inspection system, but was eventually excluded and excluded from certification.

(1) An extremely wide range of substances can be handled. Measurement of substances handled, dry and wet, agglomerated powder, corrosion control,
A brittle product can be handled with minimal damage without being affected by wear and the like. (2) A wide range of throughput and a wide range of transport capacity. (3) Continuous metering is possible. Other types of feeders are used for transport weighing on a weighing platform or for continuous metering in combination with a belt feeder. (4) Since the material does not come into contact with the rotating parts, maintenance is easy and there is almost no breakdown. (5) As a transportation method, horizontal, inclined, or a combination thereof can be freely selected, and the discharge can be arbitrarily performed as long as it is horizontal. (6) Smooth operation, no sound.

There are also the following problems. (1) In order to correct this problem, the variation in the transport volume is multiplied by the average value of the transport volume and the transport distance to calculate the transport volume, and the transport volume is integrated and displayed. It is low. (2) Depending on the material, the material is supplied using a feeder of a type with higher quantitative accuracy than the belt, and continuous measurement is performed, but the cost is high. Selection of union operation for connection with other type feeders,
It is considered difficult to maintain and have problems. (3) In continuous transport metering, correction is made in various ways, but intermittent supply to quantitative metering cannot be applied with conventional technology.

[0007] In the conventional belt transport, the material c is discharged from the hopper a onto the transport belt b, and the outlet d is used, as shown in FIGS.
Only the feed amount control gate e is attached to the control unit.
The hopper a on the belt b is not a supply hopper, but is used as a hopper. The material pressure is directly applied on the belt b, and a bridge or trouble occurs at the discharge port f as shown in FIG. Pressure, the material by the control gate e, the initial speed of the deposited material c is smaller than the belt speed, and the material c ′
Slip occurs between the belt and the belt b, and the material c 'is deposited at the base of the skirt g, g to cause spillage. Therefore, it takes a long time until the material reaches the belt speed due to friction (long distance).
In a short distance feeder, the material arrives at the input chute before settling on the belt. The intermittent transport of materials is not solved.

[0008]

To transport a material belt, a rubber plate having a thickness of about 3 mm and a width of about 50 mm is attached to the lower part of a skirt plate attached to the side of the hopper so as to be able to be adjusted up and down (to make a mounting hole a long hole). To make the material not to spill. Use the cut end of the skirt rubber plate or the old belt appropriately, but if it is too hard, the surface of the belt will be damaged. Should be used.

When a material is placed on a belt from a hopper,
Inevitably, some material rolls on the belt. For this reason, it is necessary to provide skirts on both sides of the belt to prevent the material from spilling while the material is stable and in a normal loading state. Since the distance is short in the belt feeder, it is necessary to provide a skirt up to the shooting chute. When the material comes on the belt from the discharge port, if the initial speed of the material is lower than the belt speed, the material will slip between the belts, and the material will accumulate at the root of the skirt, and the force will be applied to the outside and the load will be applied. Overloading of the material due to friction will cause the overload of the material to carry many times the rated load at the exit point, but must be guided by the skirt until the material settles on the belt with a belt feeder.

The material takes a long time to settle, during which it travels a long distance. Since the distance is short in the belt feeder, the material arrives at the input chute before the material is settled.

The use of drive pulleys (flat surfaces) at both ends of the belt conveyor is indispensable. In a short feeder, the distance between the pulley and the first roller trough is required, and it is not possible to use a roller trough in a short feeder, and all belt feeders are flat belts.

Processing after Stopping Supply of a Fixed Amount In intermittent material supply, a desired amount is supplied from the first supply, and then the belt is stopped with the material placed on the belt by a fixed signal, and the material is cut off on the belt pulley on the input chute. Stopped in a crumbled state, it is almost in a state of falling.

Dropping often occurs during the next supply, and if it falls into the metering hopper, the quantitative value is disturbed. As a countermeasure, there is a method in which a vertical gate is provided on a roller belt and a sector gate is provided below a charging chute. However, such methods have not been practiced in terms of biting, operation, maintenance, cost, and the like.

It is an object of the present invention to realize continuous and constant transport of bulk material in a belt.

[0015]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an opposing skirt which is inclined downward in an opposing direction toward an upper surface of an upper transition portion of a belt conveyor in a transition direction of the transition portion. Vertical plates are provided on both outer sides of the skirt,
A supply hopper is opened between the opposing skirts, and a horizontal slotting plate orthogonal to the above-mentioned transition direction is provided at the end side of the opening so that the lower end of the opposing skirt faces the upper transition part with a slight gap therebetween. Wherein the cross section of the transported bulk material surrounded by the upper transition portion, the opposed skirt and the horizontal cutting plate is formed in an inverted trapezoidal shape, wherein the inner surface of the opposed skirt is slippery. The metering belt conveyor device according to the first or second aspect of the present invention, wherein the conveyor is rotatable forward and backward and faces the opening at an interval from a starting end of an opposing skirt and a vertical plate. The fixed-quantity belt conveyor device according to any one of the first to third inventions, wherein the inner surface of the skirt is formed of a polished metal surface, and the vertical plate is made of rubber. Both side plates of the supply hopper are formed parallel and perpendicular to the transition direction of the upper transition portion of the conveyor, and the upper ends of two rotation adjusting plates orthogonal to the both side plates are formed between both side plates. The fixed amount belt conveyor device according to any one of the first to fourth aspects of the present invention is configured such that a chute that can be opened and closed is formed in the hopper by pivotally supporting the side and the end side.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A starting end floating roller 10 and a terminating driving roller 11 are supported on a machine frame 9 by supporting shafts 10 'and 11', and an endless flat belt 1 "is wound between the rollers 10 and 11 so as to be forward and reverse. The rotation of the rotatable end drive roller 11 moves the upper transition portion 1 'of the flat belt 1 "from the start end to the end at a constant speed. The lower surface of the upper transition portion 1 'is supported by a plurality of rollers 12' or a fixed support plate (not shown), and is a constant-speed belt conveyor 1 capable of rotating forward and reverse.
Is formed.

Immediately above the center of the upper transition section 1 ', a bulk material supply hopper 4 is provided on the upper machine casing 9'.
Is a vertical plate whose both side plates 4 ", 4" are perpendicular to each other, and which is parallel to the transition direction of the upper transition portion 1 'and which is perpendicular to the both side plates 4 ", 4" at the start end side and both side plates 4 "at the end side. An inclined plate is provided which is orthogonal to "4" and is inclined downward on the vertical plate side.

Bolts and nuts are provided at the lower ends of the both side plates 4 ", 4" so that opposing skirts 2, 2 which are inclined downward in the opposing direction toward the upper surface of the upper transition portion 1 ', are inserted into vertically long holes. The upper part of the vertical rubber plates 3, 3 is superimposed on the outer sides of the opposed skirts 2, 2 so as to be adjustable in the vertical direction. It is fixed with a slight gap t between the lower ends of 2, 2 and the upper surface of the upper transition portion 1 '.

The opposing skirts 2, 2 are formed of a metal plate whose inner surface is a polished surface, and the inner surface is made slippery,
The frictional resistance between the bulk material 6 and the material to be transferred 6 is reduced to a small constant frictional resistance.

Easy-slip property Opposing skirts 2, 2 Polished stainless steel plate or other polished metal plate is used, but a wooden plate or a synthetic resin plate coated with a frictional resistance reducing paint is used, and is inclined about 15 degrees from a vertical plane in the facing direction. Let it.

Below the starting end side vertical plate 4a and the end side inclined plate 4b of the hopper 4, horizontal cutting plates 5, 5 are provided so as to be vertically movable, and the lower ends of the cutting plates 5, 5 are opposed to the opposing skirts 2, 2. The horizontal sliding plate 5 is provided at a right angle and is located on the upper transition portion 1 ', the opposing skirts 2, 2 and the inclined plate 4b side.
The cross section of the transported bulk material 6 surrounded by is formed in an inverted trapezoidal shape (the state is shown in FIGS. 2A and 2B).

As shown in FIGS. 1 (b) and 2 (b), a right-angled triangular space c is provided between the slippery opposing skirts 2, 2 and the rubber vertical plates 3, 3. The opposing skirts 2, 2 and the vertical plates 3, 3 are extended from the starting end of the hopper 4 to the starting end of the upper transition portion 1 ', and
2 and a starting end side interval s is formed.

The opposed skirts 2, 2 and the vertical plate 3,
Reference numeral 3 extends from the hopper 4 until it slightly bypasses the end driving roller 11 of the upper transition portion 1 '.

Between the two side plates 4 ″ and 4 ″ of the supply hopper 4, there are two rotation adjusting plates 7 orthogonal to the two side plates 4 ″ and 4 ″.
The upper end of the hopper 4 is fixed to the horizontal shafts 7 ', 7' orthogonal to the side plates 4 ", 4" at the start and end sides of the upper ends of the side plates 4 ", 4". The handles 7 ", 7" for the rotation adjusting plates 7, 7 are suspended from one ends of the horizontal shafts 7 ', 7' protruding from the rotating shafts 7 ', 7'. The inclination angle of the rotation adjusting plates 7, 7 can be held by the horizontal screw rods 7b, 7b screwed into the hopper 4 by adjusting the downward inclination angle in the facing direction. ". By the rotation adjusting plates 7, 7, the supply amount and the supply direction of the bulk material 6 and the bridges and troubles shown in FIGS. 6A, 6B, 6C, and 6D are eliminated and adjusted. Provided joint plate 7a,
7a is provided.

The elevation of the horizontal cutting plates 5, 5 and the connecting plates 7a, 7a can be adjusted by inserting bolts into vertically long holes and tightening them with nuts.

Accordingly, the bulk material 6 supplied to the upper transition portion 1 ′ from the opening 4 ′ of the supply hopper 4 is separated from the upper surface of the upper transition portion 1 ′, the inclined opposed skirts 2, 2 and the longitudinal section surrounded by the horizontal cutting plate 5. It becomes a trapezoidal surface (shown in FIG. 2B) and moves with the transition of the upper transition part 1 '.

At the time of the above movement, the inclined opposing skirts 2, 2
Is inclined downwards in the opposite direction and has a slight gap t between the upper transition portion 1 ', so that it does not come into contact with the belt 1 ", and the component 6 of the material 6 has a vertical force component. The skirts 2 and 2 are directed in a direction perpendicular to the inclination direction of the skirts 2 and 2 and are directed to the inside of the skirts 2 and 2, so that they hardly flow out of the gap t.

Even if it flows out of the gap t, a right-angled triangular space c between the vertical plate 3 and the opposing skirt 2
And the outflow naturally stops (FIG. 6).

The inner surfaces of the opposing skirts 2, 2 are slippery, or the metal plate has at least the inner surface polished so that the material 6 which moves with the transfer of the belt 1 "and the inner surfaces of the opposing skirts 2, 2 are formed. And there is almost no uneven transport due to rolling due to friction.

When the belt conveyor 1 is stopped, the material 6 which has slightly bypassed the terminal drive roller 11 is lost (falls down), and the stable transport value is disturbed. Therefore, immediately after the belt 1 "is stopped by the fixed amount stop signal, if the terminal drive roller 11 is reversed by about 45 degrees, the above-mentioned bleeding portion becomes a horizontal portion of the belt 1" (a horizontal portion of the upper transition portion 1 ').
The risk of falling back is eliminated.

At the time of the reverse rotation, the material 6 immediately below the supply hopper 4 moves backward from the starting end of the opening 4 'to the interval s between the opposing skirts 2, 2 and the vertical plates 3, 3 at the starting end, and the material 6 in the opening 4'. No change in load due to consolidation of 6. Therefore, when the transport of the belt conveyor 1 is restarted, the initial speed of the material 6 immediately below the opening can be transported at an approximate speed close to the transition speed of the upper transition portion 1 ', and quickly returns to the transition speed of the upper transition portion 1'.

The material 6 charged into the supply hopper 4 has conventionally caused a bridge or trouble as shown in FIGS. 6 (a), 6 (b), 6 (c) and 6 (d). Bridges or troubles (stop of lowering of the material) by rotating the motion adjusting plates 7, 7 in opposite and opposite directions around the upper horizontal axis 7 ', 7' or repeatedly to release the material 6 therein. ) Can be eliminated.

In FIG. 1, reference numeral 13 denotes an upper closing cover of the vertical plates 3 and 3 at the start and end sides of the supply hopper 4, reference numeral 14 denotes a chain for driving the end drive roller 11, reference numeral 15 denotes a forward / reverse constant-speed electric motor for drive, and
16, 16 'are sprockets around which the chain 14 is wound, 17 is a material input port provided in the upper machine casing 9', 18 is a material storage tank provided above the input port 17, 18 'is an opening at the lower end thereof, In FIG. 4, reference numeral 19 denotes a weighing hopper, and 19 'denotes an opening / closing gate of the weighing hopper 19.

[0034]

According to the present invention constructed as described above, the transported bulk material is uniformly formed in a trapezoidal longitudinal section at the upper transition portion of the belt conveyor, and the frictional resistance with the opposing skirt is slightly suppressed. The bulk material, which has little difference in speed between the bulk material and the bulk material and flows out from the small gap between the opposing skirt and the upper transition portion, forms a repose angle α as shown in FIG. Has the effect of enabling continuous quantitative transport by the

When the belt conveyor is stopped, the portion that stays around the end driving roller in the downward direction can be moved backward by reversing the conveyor so that the portion can be moved backward to the horizontal portion of the upper transition portion, resulting in a stoppage. It is possible to prevent a weighing error in continuous quantitative transportation due to dropping.

In the above reverse rotation, the bulk material immediately below the supply hopper is not consolidated upward, moves into the space provided at the start end side of the opening, and moves to the opening during the next transportation toward the end side. The load on the upper transition portion of the bulk material immediately below the lower transition portion is small, and the bulk material can quickly follow the speed of the upper transition portion through the horizontal cutting plate to perform continuous quantitative transportation.

Further, the bulk material in the supply hopper can be smoothly supplied from the opening to the belt conveyor without a risk of forming a bridge or a state in which the two rotation adjusting plates are forced to approach and separate from each other and cannot be lowered.

[Brief description of the drawings]

FIG. 1 (a) is a side view showing a metering belt conveyor device of the present invention. (B) The figure is a longitudinal sectional front view of the figure (a).

FIG. 2 (a) is a partially enlarged side view of FIG. 1; (B) The figure is a longitudinal sectional front view of the figure in FIG.

FIG. 3 (a) is a partially enlarged side view of FIG. 2 (a).
FIG. 3 (b) is a longitudinal sectional front view of FIG. 3 (a).

FIG. 4 is a side view of a state in which bulk material is continuously transported.

FIG. 5 is a partially enlarged front view of a lower end portion of the opposing skirt.

FIGS. 6 (a), (b), (c) and (d) are longitudinal sectional views of a conventional supply hopper in a trouble state.

FIG. 7 is a side view of a conventional continuous conveyor.

FIG. 8 (a) is a longitudinal sectional front view of the supply hopper section of FIG. 7; (B) The figure is a front view of FIG. 7 viewed from the right.

[Description of Signs] 1 Belt Conveyor 1 'Upper Transition 1 "Belt 2 Opposing Skirt 3 Vertical Plate 4 Supply Hopper 4' Opening 4" Side Plate 5 Horizontal Cutting Plate t Gap 6 Bulk Material s Interval 7 Rotation Adjusting Plate 8 shoot

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[Procedure amendment]

[Submission date] April 30, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

4. A side plate of a supply hopper is formed parallel and perpendicular to a transition direction of an upper transition portion of the conveyor, and upper ends of two rotation adjusting plates orthogonal to the both side plates are provided between both side plates. The fixed amount belt conveyor device according to any one of claims 1 to 3, wherein a chute that can be opened and closed is formed in the hopper by pivotally supporting the start and end sides of the upper end of the plate.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007] In the conventional belt transport, the material c is discharged from the hopper a onto the transport belt b, and the outlet d is used, as shown in FIGS.
Only the feed amount control gate e is attached to the control unit.
The hopper a on the belt b is not a supply hopper, but is used as a hopper. The material pressure is directly applied on the belt b, and a bridge or trouble occurs at the discharge port f as shown in FIG. pressure, Ri by the above-mentioned control gate e, deposited material
The initial speed of the material is lower than the belt speed, a slip occurs between the material c 'and the belt b, and the material c' deposits at the root of the skirt g, g, causing the material to spill. long until required (long distance), interrupted variation transport because the distance in the short feeder of the material arrives at the input chute before settling down on the belt material does not resolve.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

[0015]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an opposing skirt which is inclined downward in an opposing direction toward the upper surface of an upper transition portion of a constant speed flat belt conveyor. A vertical plate is provided on both outer sides of the skirt, a supply hopper is opened between the opposing skirts, and a horizontal slitting plate orthogonal to the transition direction is provided at the end side of the opening. The cross section of the transferred bulk material surrounded by the upper transition portion, the opposing skirt and the horizontal cutting plate is formed in an inverted trapezoidal shape , and the inner surface of the opposing skirt is easily slippery.
And opposing skirt quantitative belt conveyor said conveyor of said first invention, wherein the easily slip through the metal surface inner surface polishing quantitative belt conveyor opposite the skirt, characterized in der Rukoto is a possible forward and reverse rotation migration direction parallel and perpendicular upper transition portions both side plates of the conveyor start from at intervals has to face the opening of the first or second invention quantitatively belt conveyor equipment supply hopper according vertical plate Formed between the two side plates, the upper ends of two rotation adjusting plates orthogonal to the both side plates are pivotally supported at the start end side and the end side of the upper ends of the both side plates to form a chute that can be opened and closed in the hopper. The metering belt conveyor device according to any one of the first to third aspects described above.

Claims (5)

[Claims] An opposed skirt is provided in the transition direction of the transition portion, wherein the opposed skirt is inclined downward in the opposite direction toward the upper surface of the upper transition portion of the belt conveyor, and vertical plates are provided on both outer sides of the skirt. The horizontal hopper plate perpendicular to the above-mentioned transition direction is provided at the end side of the opening, and the lower end of the opposing skirt faces a small gap between the upper skirt and the upper skirt. A fixed belt conveyor device characterized in that the section of the transferred bulk material surrounded by the section, the opposing skirt and the horizontal cutting plate is formed in an inverted trapezoidal shape. 2. The metering belt conveyor according to claim 1, wherein the inner surface of the opposing skirt is slippery. 3. The metering belt conveyor device according to claim 1, wherein the conveyor is rotatable forward and backward, and the opening faces the opening at an interval from a start end of the opposing skirt and the vertical plate. 4. The fixed-quantity belt conveyor device according to claim 1, wherein the inner surface of the opposing skirt is formed of a polished metal surface, and the vertical plate is made of rubber. 5. A side plate of a supply hopper is formed to be parallel and perpendicular to a transition direction of an upper transition portion of the conveyor, and upper ends of two rotation adjusting plates orthogonal to the both side plates are provided between both side plates. The metering belt conveyor device according to any one of claims 1 to 4, wherein a chute that can be opened and closed is formed in the hopper by pivotally supporting a start end and an end of an upper end of the plate.