JPH0986668A - Bucket cover for chain bucket type reclaimer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce dispersion of dust when a reclaimer is scraped, by successively receiving a cover unit in an upper step when a cover unit in the lowermost step is moved to be lifted. SOLUTION: In a part where a bucket 4a scrapes bulk from a pile, a bucket cover obstructs, so that it covers the upward from in the vicinity of the part with the bulk scraped. Since a height of the pile is changed in a part scraped by a traverse frame during traversing, the height of the pile is detected by a pile height detector 28, a detection value is fed as a signal to a cover position control device. The cover position control device calculates a position, where a cover unit 23a in the lowermost step must be placed, From a height of the part scraped by the bucket 4a, a command signal is fed to a rope rewinder 25, the cover unit 23a in the lowermost step is lifted. When the cover unit 23a in the lowermost step is lifted, it successively receives a cover unit 23 in an upper step.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket cover of a chain bucket type reclaimer for collecting loose material that overflows and falls from a bucket to prevent generation of dust.

[0002]

2. Description of the Related Art A reclaimer is used as a device for continuously discharging loose materials such as coal and iron ore piled up in a yard as piles. There are various types of such reclaimers, for example, the new edition Mechanical Engineering Handbook C-3 transport machine edited by the Japan Society of Mechanical Engineers (June 1, 1991, first edition 2
Various reclaimers are introduced on pages 43-45 of the Printing).

Boom reclaimers are introduced in the above publications. The boom reclaimer has a boom that can be raised and lowered and swiveled on a traveling carriage that travels along the pile, scrapes loose items with a bucket wheel that is installed at the end of the boom, and grounds it via an on-board conveyor that is installed along the boom. It is sent to the conveyor and the loose items are paid out.

The boom type reclaimer shown above has the following problems. That is, the payout is performed by rotating the bucket wheel and turning the boom. When the payout for one turning pass is completed, the traveling carriage travels one pitch and pays out for the next one turning pass. At this time, since the scraping amount differs depending on the boom angle, it is difficult to dispense a fixed amount.
Furthermore, when the pile is a semi-underground type, the boom hits the side wall of the storage tank on the side of the traveling carriage, so that the portion near the side wall cannot be scraped off. In order to completely scrape off this portion, the diameter of the bucket wheel must be extremely increased.

Further, the above publication introduces a bridge reclaimer as another example. The bridge-type reclaimer is a bridge-shaped traveling frame that runs on rails installed along both sides of the pile and has a traverse frame with bucket wheels, and the rotation of the bucket wheels on the traverse frame. The scraps are scraped off by, penetrate through the bucket wheel, and are discharged to the above-ground conveyor via the on-machine conveyor provided along the beam of the traveling frame.
In addition, a comb-shaped member is provided on the traverse frame so that it can be undulated, and it is pierced on the slope of the pile and made to traverse with the traverse frame, promoting the collapse of loose objects along the slope on the traverse frame side of the pile, and the bucket wheel. Scrape with.

In the case of such a bridge reclaimer, there are the following problems. That is, the pile is formed, for example, with a width of 50 m and a length of 500 m.
There are cases where coal of different m types is loaded, and the piles must be paid out freely from any of the piles. However, in this type of reclaimer, the height of the bucket wheel is fixed, so that it is not possible to get over the pile, and a plurality of reclaimers are required when there is the above demand. Further, as described above, the scraping is performed depending on the collapse of the bulk material, so that the quantitative scraping cannot be performed when the collapse is not performed uniformly.

In order to solve such a problem, the applicant of the present application developed a chain bucket type reclaimer and filed a patent application therefor (Japanese Patent Application No. 7-175665 (unpublished)). The chain bucket type reclaimer disclosed in the above application (not yet published) will be described below with reference to the drawings. 6 is a front view of the chain bucket type reclaimer of the present invention, FIG. 7 is a view taken along the line AA of FIG. 6, and FIG. 8 is a line BB of FIG.
An arrow view and FIG. 9 are side views of the chain bucket. Figure 6
9 to 9, reference numeral 1 denotes a gate-shaped frame, and the rigid leg 1
It consists of a, a swinging leg 1c, and 1b that connects them.

At the lower part of each leg, there are traveling wheels 1d and a traveling drive device 1e. Reference numeral 2 denotes a traverse frame, which has wheels 2a and traverses on the beam 1b of the gate-shaped frame 1 by a drive device (not shown). A tilting frame 3 is pivotally supported on the transverse frame 2 at an upper end 3a. 12
Is a hydraulic cylinder in which the base end of the cylinder 12a is pivotally supported by the transverse frame 2 and the tip of the piston rod 12b is connected to the diagonal member 3a of the tilting frame 3, and the tilting frame is vertically tilted by expansion and contraction. It is a tilting means.

Reference numeral 4 is a chain bucket, and bucket 4
The a is connected and supported by the endless chain 4b. The chain bucket 4 is the upper end 3a of the tilting frame 3,
The chain sprockets 4e and 4g provided at the lower end 3b and the chain sprocket 4f provided above the middle portion of the tilting frame 3 are hung along the tilting frame 3 and provided above the chain sprocket 4e at the upper end 3a of the tilting frame 3. 2 chain sprockets 4
The tilting frame 3 is erected from around the upper end 3a of the tilting frame 3 by c and 4d. A chain bucket drive device 4h is connected to the chain sprocket 4c.
The extension of the chain 4b is taken up by the chain sprocket 4g at the lower end.

Reference numeral 5 denotes an on-machine conveyor, which uses a belt conveyor. The on-board conveyor 5 is provided on the girder 1b of the gate type frame 1 and is scraped off by the chain bucket 4 so that when the bucket 4a passes through the chain sprocket 4c and is reversed, the loose material discharged from the bucket 4a is hopper 11 And is conveyed to the end of the receiving gate frame (the left end in FIG. 6) via the.

Reference numeral 6 denotes a chute provided along the rigid legs 1a of the gate-shaped frame 1 for dropping loose objects conveyed by the on-board conveyor 5 through the inside. A ground conveyor 7 conveys the loose material discharged from the chute 6. Reference numeral 8 is a pile, which is formed by bulk piled up items in a storage tank 9 that is semi-underground. The storage tank 9 has a pool shape having a side wall 9a. Rails 10 along both sides of the pile 8
Is provided. The above-ground conveyor 7 is also provided along the pile 8.

Disbursement of loose items is performed as follows.
The tilt angle α of the tilting frame 3 is fixed with the lower end 3b of the tilting frame 3 lowered to near the bottom of the pile. The traverse frame 2 is traversed while moving the chain buckets 4 to scrape loose pieces from the pile 8. Bucket 4a is the top chain sprocket 4c of chain bucket 4.
Since it is reversed when passing through, the loose material in the bucket 4a is thrown into the hopper 11 and drops onto the on-machine conveyor 5 provided below the hopper 11. The loose material is conveyed to the rigid leg 1a side by the on-machine conveyor 5, passes through the chute 6 provided along the rigid leg 1a, falls on the ground conveyor 7, and is conveyed to the outside by the ground conveyor 7.

When the fixed amount payout is performed, the traverse speed of the traverse frame 2 is increased and changed at the slopes 8a on both sides of the pile 8, and the traverse speed at the flat portion 8b at the center of the pile 8 is set to a slow constant speed.

[0014]

As described above, the scraping portion of the chain bucket type reclaimer having the chain bucket suspended along the tilting frame (the tilting frame) is provided except for the tip of the chain sprocket. Although it is inclined and forms an inclined scraping part, after the bucket has passed the pile of loose pieces, such as in a place where the height of the pile is low,
Loose objects overflow from the bucket and fall on the pile while moving diagonally upward without scraping. At this time, if wind blows, pulverized coal or the like may be scattered. It should be noted that although there is a vertical portion following the inclined portion, loose pieces do not overflow in this portion.

The present invention has been devised in view of the above problems of the prior art. Even if loose material overflows from the bucket at the inclined scraping portion, it does not drop in the air and prevents pulverized coal from scattering. The object is to provide a bucket cover for a chain bucket reclaimer.

[0016]

In order to achieve the above object, a bucket cover of a chain bucket type reclaimer according to the present invention has a chain bucket suspended along an inclined frame, and a chain for scraping loose pieces from a pile. A bucket cover for an inclined scraping portion of a bucket type reclaimer, comprising a rail provided along an inclined frame and a plurality of cover units suspended slidably in the rail longitudinal direction by the rail, The cover unit is formed in a nesting manner by gradually becoming smaller from the lower side to the upper side, and when the cover unit at the lowermost stage is moved upward by the elevating drive means, the cover unit at the upper stage is accommodated in order. .

Further, a pile height detector for detecting the pile height and a cover position control device for calculating the position of the lowermost cover unit based on a signal from the detector and transmitting a command signal to the elevating and lowering drive means are provided. It should be provided.

Next, the operation will be described. Since the bucket cover is an obstacle when scraping loose material on the pile with the bucket, the bucket cover should cover above the vicinity of the scraped portion. Since the pile height changes during the traverse of the traverse frame, the pile height is detected, and the range covered by the bucket cover is controlled based on the detected pile height.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a bucket cover of the chain bucket type reclaimer of the present invention.
FIG. 2 is a partially enlarged side view of the cover. FIG. 3 shows A in FIG.
FIG. FIG. 4 is a side sectional view of the bottom of the cover.

1 to 4, reference numeral 21 denotes a bucket cover, which is composed of a plurality of cover units 23. Reference numeral 22 denotes rails, which are fixed to the right and left side faces of the tilting frame (tilt frame) 3 in pairs. A single V groove 22a (FIG. 3) is provided on the side surface of the rail 22. The cross section of the cover unit 23 is formed in a U-shape, and as shown in FIG.
It is suspended from an abacus bead-shaped roller 23c running in a. As shown in FIG. 3, the bottom surface 23h of the cover unit 23 is spaced apart from the tip of the bucket 4a by a required distance so that coal spilled from the bucket does not get clogged with the tip of the bucket and descends inside the bucket. There is.
The cover unit 23 is formed in a nesting manner by gradually decreasing in size from the cover unit 23a at the lowermost stage to the cover unit 23b at the uppermost stage. The uppermost cover unit 23b is prevented from descending from a predetermined position by a stopper (not shown). The lowermost cover unit 23a is suspended by four rollers 23c vertically and horizontally, and the other cover units 23, 23b are suspended by two rollers 23c at the upper end.
The lower end is supported by the adjacent cover unit 23 or 23a on the lower side. The lowermost cover unit 23a has two protrusions 23d and 23d (FIG. 2) on the upper part thereof, and they are respectively connected to the ends of the wire rope 24.

An intermediate portion of the wire rope 24 is wound around a rope winding device 25 as an ascending / descending driving means, and both ends of the wire rope 24 are the projections 23 of the lowermost cover unit 23a as described above.
The rope sheave 26a, which is connected to d and is provided near the lower end of the rail 22, and the rope sheave 26b provided near the upper end of the rail 22, are wound around. As shown in FIG. 5, the rope winding device 25 is a wire drum 25.
a and a motor 25b connected thereto, the wire rope 24 is wound around the wire drum 25a a plurality of times, and when rotating in either direction, when winding one wire rope 24, the other wire rope 24 Is rewound.

Reference numeral 27 denotes an upper bucket cover, which covers the return side of the chain bucket 4a. 28 is a pile height detector. An ultrasonic type detector is preferable as the detector. FIG. 5 is a flow sheet showing a method of controlling the position of the bucket cover by driving the rope winding device 25 as the elevating drive means in response to the signal from the pile height detector. 29 is a cover position control device.

Next, the operation of the present embodiment will be described. At the portion where the bucket 4a is scraping loose material from the pile 8, the bucket cover is an obstacle, so the bucket cover should be covered above the vicinity of the scraping portion. Since the height of the pile 8 at the portion scraped by the transverse frame during traverse changes, the height of the pile 8 is detected by the pile height detector 28. The pile height detector 28 sends the detected value as a signal to the cover position controller.

The cover position control device 29 calculates the position of the cover unit 23a at the lowermost stage from the height of the portion scraped by the bucket 4a, and sends a command signal to the rope winding device (elevating drive means) 25. The lowermost cover unit 23a is moved up and down. The bottom cover unit 23
When a is raised from the position shown in FIG. 1, the cover unit 23 adjacent to the upper side is accommodated, and the cover unit 2 at the bottom is
The stopper 23e provided at the upper end on the inner side of the bottom surface of 3a contacts the stopper 23f provided on the upper end on the outer side of the bottom surface of the cover unit 23 adjacent to the upper side. The bottom cover unit 23a
When the cover unit 23 rises as it is, the cover unit 23 adjacent to the upper side also rises together. The bottom cover unit 2
When 3a continues to rise, all the cover units 23 and 23b are accommodated up to the uppermost cover unit 23b. The rail 22 is extended further upward, and when the chain bucket 4 is inspected or the like, the rail 22 can be raised to the rail end while accommodating all the cover units 23. When lowering the cover unit 23, the stopper 23g provided on the lower outer side of the bottom surface of the cover unit 23 and the stopper 23e provided on the upper inner side of the bottom surface of the cover unit 23 come into contact with each other, so that the cover units 23 are not separated from each other. Absent. Further, the uppermost cover unit 23b is prevented from moving downward from a predetermined position by a stopper (not shown), so that all the covers are prevented from gathering downward.

Since the bucket cover 21 has the above-mentioned structure, a step is formed at the joint portion of each cover unit 23, but since this step is downwardly stepped, a loose object is covered. It does not get in the way of falling inside 21.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention. For example, this bucket cover is not limited to the chain bucket type reclaimer described with reference to FIGS.
Any type of chain bucket reclaimer having an inclined scraping portion can be applied.

[0027]

As described above, the bucket cover of the chain bucket type reclaimer of the present invention is equipped with a telescoping bucket cover, which is attached to the inclined scraping portion of the chain bucket type reclaimer. Since the upper part of the chain bucket is covered from the vicinity of the part being taken, loose objects overflowing from the bucket fall in the cover and fall on the pile, so even if the wind blows, almost all dust will be scattered. It has an excellent effect such as no.

[Brief description of drawings]

FIG. 1 is a side view of a bucket cover of a chain bucket type reclaimer of the present invention.

FIG. 2 is a partially enlarged side view of a cover part.

FIG. 3 is an enlarged view taken in the direction of arrows AA in FIG. 1;

FIG. 4 is a side sectional view of the bottom of the cover.

FIG. 5 is a flow sheet showing how to control the position of the cover.

FIG. 6 is a front view of a chain bucket reclaimer.

FIG. 7 is a view on arrow AA of FIG. 6;

FIG. 8 is a view taken along the line BB of FIG.

FIG. 9 is a side view of the chain bucket.

[Explanation of symbols]

 3 Tilt frame (tilt frame) 4 Chain bucket 22 Rail 23 Cover unit 23a Bottom cover unit 25 Rope winding device (elevating drive means) 28 Pile height detector 29 Cover position control device

Claims (2)

[Claims] 1. A bucket cover for an inclined scraping portion of a chain bucket type reclaimer for scraping loose material from a pile, the bucket cover having a chain bucket stretched along the inclined frame, the bucket cover being provided along the inclined frame. Rails and a plurality of cover units suspended slidably in the rail longitudinal direction by the rails, and the cover units are formed in a small size in order from the bottom to the top, and are nestable. A bucket cover for a chain bucket type reclaimer, wherein when the lowermost cover unit is moved upward by the elevating and lowering drive means, the upper cover unit is housed in order. 2. A pile height detector for detecting a pile height, and a cover position control for calculating a position of a lowermost cover unit on the basis of a signal from the detector and transmitting a command signal to a lifting drive means. A bucket cover for a chain bucket reclaimer according to claim 1, further comprising a device.