JP6195751B2 - Automatic roller tilting water cleaning device for falling object receiving plate of endless belt conveyor - Google Patents

Description

  The present invention relates to an automatic roller tilting water cleaning device for a falling object receiving plate of an endless belt conveyor.

The raw materials used in the steelworks are mainly iron ore and coal, and these raw materials are usually transported by an endless belt conveyor. There are endless belt conveyors in steelworks having a belt width of 750 mm to 2400 mm, and they are properly used according to the transport amount.
However, in transporting iron ore and coal by an endless belt conveyor, there are safety and environmental problems due to the fall of the transported material and accumulation.

  There are various causes of falling objects from the belt conveyor, and one of them is the fall of adhered powder from the return belt. Iron ore or coal usually contains 5 to 10% by mass of water, but fine ore and powdered coal with a small particle size may have a moisture value ranging from 10 to 20% by mass because of their large specific surface area. is there. If fine ore containing high moisture or fine coal is present on the surface of the belt, it adheres to the surface of the belt due to its adhesive force. When the belt is reversed by the pulley at the tip of the belt, the lump ore and lump coal are transferred to the next belt, but the fine ore or lump coal adhering to the belt surface is returned to the return belt while adhering to the belt. The

  While being returned by the return belt, the fine ore or pulverized coal adhering to the surface of the return belt comes into contact with the snap pulley, the return roller, etc., and falls off. In large steelworks, a large amount of raw material is transported, so that a large amount of fallen ore or coal is deposited under the belt conveyor. In particular, in a few meters immediately after the belt returns at the tip of the belt, the amount of fine ore or fine coal deposited is large. For this reason, various efforts have been made to treat the fine ore or coal powder deposited under this belt conveyor, taking into account the space and height of the transfer section of the belt conveyor, the arrangement of rollers on the return belt side, etc. .

  A falling-off processing device installed at the connecting portion between the upper belt conveyor and the lower belt conveyor. A belt cleaner is provided directly under the return belt of the upper belt conveyor, and a feeder having a vibration device is installed under the belt cleaner. There is a proposal of a powdered ore falling processing apparatus that supplies falling ore powder to a lower belt conveyor (Patent Document 1).

  An ore falling processing apparatus installed at a connecting portion between an upper belt conveyor and a lower belt conveyor, and an endless chain having a plurality of attachments having an L-shaped cross section on a flat floor just below a return belt of the upper belt conveyor There is a proposal of a powdered ore falling processing apparatus that provides a belt and drops falling powder from an upper belt conveyor onto a lower belt conveyor by a plurality of L-shaped attachments of the endless chain belt (Patent Document 2).

  A bucket carriage that can run on rails and its guide car are installed below the end of the belt conveyor, and the falling powder from the belt conveyor is received by the bucket truck, and the powder that causes the bucket truck to be carried to the bucket unloading truck by the guide car. There is a proposal of a state falling ore treatment apparatus (Patent Document 3).

  Install a scraper below the belt conveyor, bring the scraper into contact with the floor, scrape the ground falling powder while advancing in the direction of the conveyor, and then lift the scraper to a non-contact height. There is a proposal of a powdered ore falling processing apparatus that processes floor falling ore by repeating the process of returning to (Patent Document 4).

  The reverse belt is reversed on the head side of the belt conveyor, and then the reversed back belt is rotated forward on the tail side of the belt conveyor, while the forward rotation of the back belt on the head side below the reverse area and on the tail side is rotated forward. There is a proposal of a powdered ore falling processing apparatus that collects falling rocks falling on the floor under the rear region in a water collecting pit by automatic water washing (Patent Document 5).

  Proposal of a powder falling ore treatment equipment that installs a water jet type falling object receptacle under the belt conveyor, and installs a plurality of partition plates in the width direction to wash the sediment and wash it. (Patent Document 6).

  A groove-like member that receives the falling powder from the return belt is arranged directly under the belt conveyor, a lever threatening washing water supply device is arranged on the upper end side of the groove-like member, and a water collecting tank is arranged on the lower end side. There is a proposal of a powdered ore recovery apparatus provided with a water collecting pit below the water tank (Patent Document 7).

Japanese Patent Laid-Open No. 50-141083 JP 50-143287 A Japanese Patent Laid-Open No. 50-43680 JP-A 61-273411 Japanese Patent Application Laid-Open No. 08-133352 Japanese Utility Model Publication No. 55-172210 JP 2007-269443 A

  According to the invention described in Patent Document 1, since the feeder that receives the falling mineral powder scraped off by the belt cleaner has the vibration device, it is possible to supply the falling mineral powder to the lower belt conveyor with the vibration. is there. However, it is effective for those having a relatively large particle size and low adhesion, but if the particle size is small and the adhesion is high, the particles are easily deposited and deposited as they are. Further, a space for installing a feeder with a vibration device is required between the upper belt conveyor and the lower belt conveyor, and there are restrictions on facilities, so that the belt conveyor that can be attached is limited.

  According to the invention described in Patent Document 2, falling powder from the upper belt conveyor can be mechanically dropped onto the lower belt conveyor. However, there is also a problem such as the chain coming off due to the falling powder falling around the chain and the drive shaft of the chain. In addition, it cannot be installed at the conveyor connecting part where there is not enough space to install a scraping device with a flat floor and an L-shaped attachment just below the return belt of the upper belt conveyor.

  According to the invention described in Patent Document 3, falling powder from the belt conveyor can be mechanically carried out. However, in addition to the space for putting the bucket carriage under the belt conveyor, it is necessary to approach the truck and to install a hoist. There are many restrictions on equipment, and the belt conveyor that can be attached is limited. There is also a problem that the equipment cost is expensive.

  According to the invention described in Patent Document 4, falling powder from the belt conveyor can be mechanically carried out. However, the falling ore powder adheres around the pivot shaft and sticks to it. Moreover, the space | interval for installing a scraper is required under a belt conveyor, and the belt conveyor which can be attached is limited.

  According to the invention described in Patent Document 5, in the region between the head side back belt reversing device and the tail side back belt reversing device, the surface of the adhering powder becomes the upper surface, so there is no falling. The falling ore powder that has fallen on the floor surface from the area before the reverse on the head side of the back belt and the area after the normal rotation on the tail side is automatically washed and collected. However, in order to rotate the belt in the forward and reverse directions, only a long conveyor belt can be used, so the belt conveyors that can be attached are limited. Further, when the belt is rotated forward / reversely, the belt is easily damaged, and the belt replacement frequency is increased.

  According to the invention described in Patent Document 6, since the falling object receptacle has a wide width, the water jet does not spread evenly over the entire surface, so that a part of the washing effect is hindered and a non-recovered part of the falling object occurs. In order to overcome this drawback, a plurality of partition plates are installed in the width direction. In this case, it is necessary to flow a certain amount of water in order to flow the falling mineral powder between the plurality of partition plates, and a large amount of water is required to continuously inject water. Further, when water is intermittently jetted, there is a problem that the nozzle is clogged with dust when the water jet is stopped in an environment with much dust.

  According to the invention described in Patent Document 7, wash water can be intermittently flowed by an insulator threatening washing water supply device provided on the upper end side of the groove-like member, and washing can be performed without using high-pressure water. It is considered possible. However, the width of the belt conveyor may be 2400 mm, and the groove-shaped member is also wide. In a normal insulator threatening shape, the cleaning water does not spread evenly over the entire surface of the wide groove-shaped member. Also, if you try to install an insulator threatening water washing device that covers the entire belt width, the amount of washing water will increase and the body of the device will have to be enlarged, so it cannot be installed unless there is enough space below the belt conveyor. .

  Further, the invention described in Patent Document 7 requires a space for rotating the trough between the belt conveyor frame and the falling object receptacle. Therefore, there is a problem that the installation of the existing equipment requires a large modification.

  In addition, the invention described in Patent Document 7 is installed only at the upper end of the belt conveyor. However, in the case of a long belt conveyor, the amount of water is insufficient with the wash water from only the upper end, and the falling deposits cannot be sufficiently removed. There's a problem. Even in the case of a long belt conveyor, a simple falling object processing apparatus that can be installed on the way is desired.

  Various approaches have been made and proposed as a method for treating fine ore or fine coal deposited under a belt conveyor. However, since the installation status of the belt conveyors is different and the number of belts is large, it is difficult to adopt measures that increase equipment costs and measures that require a large space for installation. Therefore, in general, there are many methods of installing a falling object receiving plate that receives falling objects from the belt conveyor under the belt conveyor, and cleaning with a manual scoop or cleaning with water by human power. . These methods require a great deal of human power, and work in the vicinity of the rotating body and the position of the head of the belt conveyor may extend from 10 to 30 m above the ground, thus posing a safety problem.

When the deposit on the falling object receiving plate under the endless belt conveyor grows, there is a problem such as a belt pushing up and the cleaning must always be performed. And the processing of the fallen object from a belt conveyor is desired for the simple and safe fallen object processing apparatus which can be installed in the narrow space between a belt conveyor frame and a fallen object receiving plate.
This problem is a common problem not only in the steelmaking field but also in all fields where goods are transported by an endless belt conveyor.

  An object of the present invention is to provide an automatic roller tilting water cleaning device for a falling object receiving plate of an endless belt conveyor that easily and safely removes deposits deposited on the falling object receiving plate.

  The present inventor has found that deposits deposited on the falling object receiving plate can be easily and safely removed by the automatic roller tilting water cleaning device for the falling object receiving plate.

  The present invention has been made to solve the above-mentioned problems based on this finding, and the gist thereof is as follows.

(1) A device for removing fallen objects falling from an endless belt conveyor and deposited on a fallen object receiving plate,
Having a roller that is a hollow, circular pipe with a rotating shaft;
The roller is disposed below the return belt of the endless belt conveyor and on the falling object receiving plate, and the direction of the rotation axis is perpendicular to the belt traveling direction and over the entire width of the return belt,
The center of gravity of the roller is eccentric from the center of the rotation axis,
The roller has an outer shell diameter of 130 to 200 mm,
The roller has a part of the upper arc open,
From the upper opening, water is poured, and when the water reaches the upper surface of the roller, the roller rotates around the rotating shaft and has a drainage guide for draining water,
After draining the water, the roller returns to the position at the start of water injection,
An automatic roller tilting type water washing apparatus for a falling object receiving plate of an endless belt conveyor, wherein a plurality of the rollers are provided.
(2) The roller has a balance weight, and before water supply and during water supply, the drainage guide and the balance weight are balanced and the water supply proceeds, and after the water supply, when the water reaches the drainage guide, the position of the center of gravity is reached. The endless belt conveyor drops according to (1), wherein the roller rotates and discharges water, and after discharging, the drainage guide and the balance weight balance again and return to the original position. Automatic roller tilting type water washing device for object receiving plate.

  It is possible to provide an automatic roller tilting water cleaning apparatus for a falling object receiving plate of an endless belt conveyor that easily and safely removes deposits on the falling object receiving plate. In particular, since the automatic roller tilting type water washing apparatus of the present invention is simple, it can be installed even in a narrow space between the conveyor frame and the falling object receiving plate, and in the case of a long belt conveyor, the amount of water is dispersed. It can be multistage.

The figure which shows the installation condition of the fall object receiving plate from a transport belt conveyor. The figure which shows an example of the method of removing the deposit on the fallen object receiving plate by a conventional method. The figure which shows the automatic roller tilting type water washing apparatus of the falling object receiving plate which concerns on this invention. The figure explaining operation | movement of the roller of the automatic roller tilting type water-washing apparatus of the falling object receiving plate which concerns on this invention. The figure which shows the external appearance of the roller of the automatic roller tilting type water washing apparatus of the fallen object receiving plate which concerns on this invention. The figure which shows the XX cross section of FIG. The figure which shows the YY cross section of FIG.

FIG. 1 shows an example of an installation situation of falling object receiving plates installed on the belt conveyor. Hereinafter, the transported goods to be transported will be described using iron ore by an endless belt conveyor, but the same applies to transport by endless belt conveyors in other fields as well as in the steelmaking field.
The front belt 1 of the endless belt conveyor is transferred by the carrier roller 4, reversed by the head pulley 3, becomes the back belt 2, is transferred by the return roller 5, is reversed again by the tail pulley 3, and is driven endlessly. The iron ore loaded on the front belt 1 is transferred to the lower belt conveyor 6 via the transfer chute 21. The powdered iron ore attached to the surface of the reverse belt 2 by the reverse of the front belt 1 falls so as to come into contact with the snap pulley 22 and the return roller 5, but the powdered iron ore adhered to the head pulley 3 to 5-6m. Many of them fall. The fallen object receiving plate 7 receives the dropped iron ore and deposits the iron ore. The falling object receiving plate 7 may extend over the entire length of the back belt 2.

  FIG. 2 shows an example of a method for removing deposits on a falling object receiving plate according to a conventional method. In this example, the worker 13 removes the deposit 8 deposited on the falling object receiving plate 7 by washing with water. The operator 13 uses the hose to wash the deposit 8 (fine iron ore) deposited on the falling object receiving plate 7 with water pumped from the water sprayer 12. The washed iron ore is collected on the ground through the water collecting basin 9, separated from the water, the water is treated by the drainage groove 11, and the washing powder 10 is collected by a shovel car (not shown). The frequency of manual water washing by this method is about twice a month. The amount of deposition to be processed is as large as 7 to 10 tons / time, and the operation is difficult. Moreover, the head pulley 3 may be installed 10 m or more above the ground, and there is a problem in a dangerous work for safety such as when a hose for washing water is pulled.

  As another method for removing the deposit on the falling object receiving plate according to the conventional method, there is a method of removing manually by using a scoop. Since there are a large number of transport belt conveyors, there is a problem in installing expensive falling object processing apparatuses on all belt conveyors. Therefore, it is limited to places where there are extremely falling objects, places where there are safety problems, and belt conveyors that can be installed without significantly modifying existing equipment.

The invention according to the present invention is an automatic roller tilting type water washing apparatus for a falling object receiving plate of an endless belt conveyor that easily and safely removes deposits deposited on the falling object receiving plate.
FIG. 3 shows an automatic roller tilting water cleaning apparatus according to the present invention. A roller 14 is attached to the falling object receiving plate 7 under the return belt (back belt 2) of the endless belt conveyor. The direction of the rotation axis of the roller is arranged perpendicular to the traveling direction of the back belt 2 and over the entire width of the back belt 2. By draining water from the roller 14, the fine iron ore deposited on the falling object receiving plate 7 is washed away. The roller 14 is provided with a plurality of rollers 14 according to the belt length and the amount of deposits on the falling object receiving plate. Since the size of the roller 14 is compact, it can be installed even in a place where the clearance between the belt conveyor and the falling object receiving plate is small. The washed iron ore accumulates on the ground through the water collecting basin 9, and after separating from water, the water is treated by the drainage groove 11 as in FIG.
Since the size of the roller 14 is compact, the automatic roller tilting water cleaning apparatus according to the present invention can be installed without significantly modifying existing equipment.

The operation of the automatic roller tilting water cleaning apparatus for falling object receiving plates according to the present invention will be described with reference to FIG. The hollow roller 14 of the automatic roller tilting type water washing apparatus has a rotating shaft 16, a roller outer shell 15, a balance weight 18, and a drainage guide 17. The roller outer shell 15 is a circular pipe, and a part of the upper surface thereof is cut in half and opened upward. A drainage guide 17 is provided on one side of the cut section.
In FIG. 4A, before the water is supplied to the roller 14, the drain guide 17 and the balance weight 18 are balanced and the roller 14 is upright. As the water is supplied from the water supply pipe 19 and reaches the drainage guide 17 and becomes full, the position of the center of gravity changes. The center of gravity of the roller 14 is decentered from the center of the rotating shaft 16. The rotation starts around (Fig. 4B). The water of the roller 14 is drained from the drain guide 17 (FIG. 4C), and returns to the original water supply position by the weight of the balance weight 18 after draining (FIG. 4D).
FIG. 5 shows an appearance of the roller 14 of the automatic roller tilting type water cleaning apparatus for a falling object receiving plate according to the present invention. The length of the roller 14 is substantially the same as that of the back belt carrier 5. The diameter of the roller outer shell depends on the amount of water spray determined by the width of the belt, but may be 130 to 200 mm.
FIG. 6 shows an XX cross section of FIG. The rotating shaft 16 is supported by the bearing 20 and rotates. As the rotating shaft 16 and the bearing 20, the rotating shaft and the bearing of the back belt carrier 5 can be used.
FIG. 7 shows a YY cross section of FIG. The roller 14 is tilted by a rotating shaft 16 having a bearing 20. At the start of water injection, the balance weight 18 and the drainage guide 17 are balanced and the roller outer shell 14 is upright. However, when the water surface reaches the upper part of the drainage guide 17, the water in the roller outer shell 14 is blown at a stretch. The fallen objects deposited on the fallen object receiving plate are washed away by being drained. After draining water, the roller 14 returns to the upright state at the start of water injection and water injection is started again. By intermittently injecting water into the roller 14 and draining from the roller 14, the amount of water washed per unit time is large, and falling objects can be washed away effectively.

  Next, examples of the present invention will be described, but the present invention is not limited thereto. In other words, the present embodiment relates to an automatic roller tilting type water washing device for a falling object receiving plate of an endless belt conveyor of an ironworks, but is not limited to the steelmaking field, and can be applied to processing of falling objects from an endless belt conveyor.

(Comparative example)
As a comparative example, the case where the deposits on the falling object receiving plate by manual water washing which is a conventional method is removed is shown. The falling object receiving plate having a belt width of 1200 mm is washed with water.
The operator 13 pumps the fallen object 8 (powder iron ore) deposited on the fallen object receiving plate 7 from the sprinkler 12 and rinses 10,000 to 15,000 L of water having a water pressure of 0.7 to 0.8 MPa with a hose. did. The frequency of manual flushing is about twice a month, and a total of four operators, one watering wheel operator, two water washing operators, and one monitor, are required as workers. Was about 6 hours. The amount of deposition to be processed was as large as 7 to 10 tons / time, which was difficult to work with. In addition, the head pulley 3 may be installed 10 m or more above the ground, and it was confirmed that it was a dangerous work for safety, such as when the hose for washing was pulled.

(Example)
The roller 14 according to the present invention was attached to a falling object receiving plate having a belt width of 1200 mm. The roller 14 has a length of 1730 mm and a diameter of 165 mm. In this case, the amount of water injected into the roller 14 was about 0.13 L / min. The amount of water at the start of tilting was 30L. As a result, the roller 14 tilted once every about 4 hours, and the iron ore deposited on the falling object receiving plate was washed and removed automatically and smoothly.
It was confirmed that the iron ore deposited on the fallen object receiving plate can be safely removed even when the head pulley 3 is installed 10 m or more above the ground.

  It is possible to provide an automatic roller tilting type water cleaning device for a falling object receiving plate of an endless belt conveyor that can easily and safely remove the deposit accumulated on the falling object receiving plate.

DESCRIPTION OF SYMBOLS 1 ... Front belt, 2 ... Back belt, 3 ... Head pulley / tail pulley, 4 ... Carrier roller, 5 ... Return roller, 6 ... Lower belt conveyor, 7 ... Falling material receiving plate, 8 ... Deposit, 9 ... Water collection樋, 10 ... water washing powder, 11 ... drainage groove, 12 ... sprinkler, 13 ... worker, 14 ... roller, 15 ... roller outer shell, 16 ... rotating shaft, 17 ... drainage guide , 18 ... balance weight, 19 ... water supply Pipe, 20 ... bearing, 21 ... transit chute, 22 ... snap pulley.

Claims (2)

A device for removing deposits deposited on a falling object receiving plate by falling objects from an endless belt conveyor,
Having a roller that is a hollow, circular pipe with a rotating shaft;
The roller is disposed below the return belt of the endless belt conveyor and on the falling object receiving plate, and the direction of the rotation axis is perpendicular to the belt traveling direction and over the entire width of the return belt,
The center of gravity of the roller is eccentric from the center of the rotation axis,
The roller has an outer shell diameter of 130 to 200 mm,
The roller has a part of the upper arc open,
From the upper opening, water is poured, and when the water reaches the upper surface of the roller, the roller rotates around the rotating shaft and has a drainage guide for draining water,
After draining the water, the roller returns to the position at the start of water injection,
An automatic roller tilting type water washing apparatus for a falling object receiving plate of an endless belt conveyor, wherein a plurality of the rollers are provided.   The roller has a balance weight, and before water supply and during water supply, the drainage guide and the balance weight are balanced and water supply proceeds, and after water supply, when the water reaches the drainage guide, the position of the center of gravity changes, The falling object receiving plate of the endless belt conveyor according to claim 1, wherein the roller rotates to discharge water, and after discharging, the drain guide and the balance weight are balanced again to return to the original position. Automatic roller tilting water cleaning device.

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