JP3987717B2 - Watering device for bulk material conveyance path - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sprinkler for a rose conveyance path provided with a conveyer for conveying a rose and a chute for guiding the rose conveyed by the conveyor to the next conveyor, and in particular, according to the conveyance amount of the rose. The present invention relates to a watering device for a bulk material conveyance path in which the amount of watering is changed.
[0002]
[Prior art]
A continuous unloader is known as an example of an apparatus including a bulk material conveyance path that transports bulk materials such as coal by connecting a plurality of conveyors.
[0003]
The continuous unloader scrapes loose articles such as coal loaded on a ship with a bucket elevator, and transfers the scraped loose articles to a predetermined place such as a yard via a plurality of conveyors. A chute is provided at the connecting portion of the conveyor, and the loose article is guided to the next conveyor by the chute.
[0004]
By the way, in such a bulk material conveyance path, in order to prevent dust from being generated when a bulk material such as coal passes (falls) the chute, water spraying has conventionally been sprinkled on the bulk material passing through the chute. A device was provided.
[0005]
Conventionally, the amount of water sprayed by this watering device is determined in advance based on the capacity of the device, and a constant amount of watering is always performed. For example, in the case of a continuous unloader with a rated capacity of 2000 t / h, about 2% of the capacity, that is, about 400 to 500 l / h of water is constantly sprinkled, and as a control of the sprinkler, water is sprayed (on). Or it was two ways of not watering (off).
[0006]
[Problems to be solved by the invention]
However, the amount of the loose material conveyed through the bulk material conveyance path is not always constant, and the conventional watering device that sprinkles a certain amount of water has too much water to be conveyed relative to the bulk material conveyance amount. Has become soaked in water and cannot be transported, or the amount of sprinkling is too small to generate dust.
[0007]
For example, in a continuous unloader, the amount of loose objects scraped by a bucket elevator is constantly fluctuating due to a change in the placement state of loose objects loaded on a ship. Because of the constant, there was an excess or deficiency in the amount of water sprayed on roses.
[0008]
Then, the objective of this invention is providing the watering apparatus of the rose conveyance path which can solve the said subject and can always perform an appropriate amount of watering.
[0009]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is provided in a bulk material conveyance path provided with a conveyor for conveying bulk materials such as coal and a chute for guiding the bulk material conveyed by the conveyor to the next conveyor. In the sprinkling device of the bulk material conveyance path for sprinkling water to the bulk material passing through the chute to prevent dust,
The loose article conveyance path is provided in a continuous unloader including a boom and a bucket elevator provided at the tip of the boom, and receives loose articles such as coal scraped by the bucket elevator to the boom side. A rotary feeder that conveys the bulk material, a boom conveyor that is provided one level lower than the rotational feeder, receives the bulk material conveyed by the rotary feeder and horizontally conveys it, and guides the bulk material conveyed by the boom conveyor to the next conveyor. A first chute for the machine, an in-machine conveyor that receives and conveys the bulk material conveyed by the boom conveyor, and the bulk material conveyed by the in-machine conveyor to the next conveyor. With a second chute to guide,
A detecting means for detecting the transport amount of the rose article is provided in the loose article transport path, and a nozzle is provided in each of the first and second chutes, and the amount of water sprayed from each nozzle according to the detection value of the detecting means. It is provided with a sprinkling amount control means for changing.
[0010]
According to this configuration, the amount of sprinkling changes according to the amount of conveyed bulk material, and an appropriate amount of watering can always be performed.
[0011]
The detection means may detect the amount of conveyed bulk material by measuring the weight of the bulk material placed on the belt of the conveyor.
[0012]
Moreover, it is preferable that the said detection means calculates the average value of the conveyed product of the loose article in a predetermined period, and makes the calculated value the said detected value.
[0013]
The detection means may be a unit that measures a driving load of a driving motor that circulates and drives the bucket elevator to detect a bulk object conveyance amount by the bucket elevator.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[0015]
The present embodiment is applied to a bulk material conveyance path of a continuous unloader, FIG. 1 shows a schematic configuration of the continuous unloader, and FIG. 2 shows a bulk material conveyance path in the continuous unloader of FIG.
[0016]
First, the outline of the continuous unloader will be described with reference to FIG.
[0017]
As shown in the figure, a continuous unloader 1 includes a traveling unit 3 that is movably provided on a wharf 2, a boom 4 that is pivotably and undulatedly supported on the traveling unit 3, and a tip of the boom 4. And a bucket elevator 5 provided.
[0018]
The boom 4 is raised and lowered by extending and retracting a raising and lowering cylinder 6 connected to the boom 4 and the traveling unit 3.
[0019]
The bucket elevator 5 includes an elevator part 7 extending in the vertical direction and a scraping part 8 positioned at the lower end part of the elevator part 7. The elevator part 7 and the scraping part 8 include an endless bucket conveyor 9. Is wrapped around. The bucket conveyor 9 is hung on a drive sprocket 10 above the elevator section 7 and is circulated and driven by a drive motor 11 (see FIG. 2) connected to the drive sprocket 10.
[0020]
The bulk material (coal or the like) B in the ship 12 is scraped off by the bucket 9a of the bucket conveyor 9 at the scraping portion 8 of the bucket elevator 5, and is conveyed upward by the elevator portion 7.
[0021]
Next, the loose article conveyance path of the continuous unloader 1 will be described with reference to FIGS. 1 and 2.
[0022]
The loose article conveyance path 13 receives the loose article B falling from the bucket 9 a that is inverted at the upper part of the bucket elevator 5 and conveys it to the boom 4 side, and the boom 4 is one step lower than the rotary feeder 15. The boom conveyor 16 that is provided and receives the bulk material B conveyed by the rotary feeder 15 and conveys it to the traveling unit 3 side . The boom conveyor 16 that is provided below the boom conveyor 16 in the traveling unit 3 and is conveyed by the boom conveyor 16 is provided. The in-machine conveyor 17 that further conveys the object B in the horizontal direction, and the ground object 18 that is conveyed by the in-machine conveyor 17 to a predetermined place such as a yard (not shown) and is provided below the in-machine conveyor 17. And. And, to the connecting part from the boom conveyor 16 to the in-machine conveyor 17 and to the connecting part from the in-machine conveyor 17 to the ground conveyor 18, the bulk B is guided to the next conveyor (the in-machine conveyor 17 or the ground conveyor 18). A first chute 20a and a second chute 20b are provided. The in-machine conveyor 17 is provided one level lower than the first chute 20a, and the ground conveyor 18 is provided one level lower than the second chute 20b.
[0023]
That is, the rose B scraped off from the ship 12 by the bucket 9a falls to the rotary feeder 15 at the upper part thereof, and is conveyed to a predetermined place via the boom conveyor 16, the in-machine conveyor 17 and the ground conveyor 18. It is.
[0024]
Now, the first and second chutes 20a, 20b are provided with a watering device for preventing dust by spraying the rose B passing through (falling) the chutes 20a, 20b. Since the amount of water sprayed by the water spray device is changed according to the amount of transport of the rose B, the appropriate amount of water spray is always performed. This will be described in detail below with reference to FIG.
[0025]
As shown in FIG. 3, the watering device 30 includes a tank 31 for storing water, and a pump 32 that sucks and discharges water from the tank 31, and the water discharged by the pump 32 passes through a pipe 33, Water is sprayed from nozzles 35a and 35b provided on the first and second chutes 20a and 20b, respectively. A relief valve 36 is connected to the pipe 33 so that the pressure in the pipe 33 is kept below a predetermined pressure.
[0026]
Furthermore, the watering device 30 includes a detection means 37 for detecting the conveyance amount of the rose B, and a watering amount control means for adjusting the amount of water flowing through the pipe 33 to change the watering amount from the nozzles 35a and 35b. 39. These detection means 37 and sprinkling amount control means 39 are connected to a computer 40. The computer 40 controls the water spray amount control means 39 based on the data input from the detection means 37.
[0027]
In the present embodiment, a conveyor scale that measures the weight of the rose B placed on the carrier belt 41 of the boom conveyor 16 is used as the detection means 37. The boom conveyor 16 includes a carrier belt 41 for placing and transporting the loose article B, and carriers 42a and 42b for supporting the carrier belt 41. The carriers 42a and 42a shown on both sides in the figure are fixed, respectively. It is supported by a fixed stringer 45a fixed on the side 43. On the other hand, the carrier 42b shown in the center in the figure is supported by a slide stringer 45b that is slidable in the vertical direction with respect to the fixed side 43.
[0028]
The conveyor scale 37 is attached to the slide stringer 45b. The conveyor scale 37 includes a pedestal 46 connected to the lower end of the slide stringer 45b, both ends of the pedestal 46, and a fixed side 43. The load cells 47 and 47 are connected to each other. The load applied to the slide stringer 45 b and the carrier 42 b is measured by the load cell 47 and the measured value is output to the computer 40.
[0029]
The slide stringer 45b supports the rose B placed on the carrier belt 41 in the range up to the center of the distance to the fixed stringers 45a and 45a located on both sides thereof, that is, in the range indicated by L in the figure. Therefore, by measuring the load applied to the slide stringer 45b, the weight of the rose B in the range indicated by the arrow L can be measured.
[0030]
The computer 40 calculates the current amount of conveyed bulk material by the boom conveyor 16 based on the measurement value input from the conveyor scale 37, the length of the distance L input in advance, and the moving speed of the carrier belt 41.
[0031]
On the other hand, the sprinkling amount control means 39 is composed of an electromagnetic throttle valve provided in the pipe 33, and the throttling amount of the electromagnetic throttling valve 39 is controlled by a current output from the computer 40, and the sprinkling amount from the nozzles 35a and 35b is controlled. Adjusted.
[0032]
In other words, the computer 40 detects the current amount of loose article transport based on the data input from the conveyor scale 37, and changes the current value output to the electromagnetic throttle valve 39 according to the current amount of loose article transport. Thus, the amount of water sprayed from the nozzles 35a and 35b is appropriately controlled.
[0033]
In FIG. 4, an example of the watering amount of the watering apparatus 39 with respect to the amount of articles conveyed by the boom conveyor 16 is shown.
[0034]
As shown in the figure, the sprinkling amount changes proportionally with respect to the loose article conveyance amount. That is, when the amount of bulk material transported is small, the electromagnetic throttle valve 39 is throttled to reduce the amount of sprinkling. Conversely, when the amount of bulk material transported is large, the electromagnetic throttle valve 39 is opened to increase the amount of water sprayed. To do. When the loose article transport amount is zero (in a state where it is not transported), the electromagnetic throttle valve 39 is fully closed, and all the water discharged from the pump 32 is returned to the tank 31 via the relief valve 36. Accordingly, water is not sprayed from the nozzles 35a and 35b.
[0035]
In this manner, the watering device 30 is controlled so as to always detect the current amount of conveyed bulk material and perform the most appropriate amount of watering with respect to the amount of bulk material transported. Therefore, even if the amount of loose objects scraped off by the bucket elevator 5 varies due to a change in the loading state of the loose objects in the ship 12, etc. The amount of sprinkling changes accordingly, and an appropriate amount of water can always be sprinkled. For this reason, excess and deficiency of the amount of sprinkling with respect to a rose thing does not arise, a conveyor is immersed in water, and it becomes impossible to convey, and dust does not generate | occur | produce.
[0036]
Further, it is possible to prevent wasteful consumption of water when the amount of bulk material transported is small or not transported.
[0037]
Here, it is preferable to set the amount of water spraying with respect to the amount of bulk goods transported to be always about 2% with respect to the current amount of bulk goods transported. However, the present invention is not limited in this respect, and is set as appropriate in consideration of the characteristics and applications of the rose.
[0038]
In addition, the control of the watering amount may be changed linearly with respect to the amount of conveyed bulk material as shown in FIG. 4, or may be changed stepwise.
[0039]
By the way, the amount of bulk material transported by the bucket elevator 5 of the continuous unloader 1 constantly fluctuates due to a change in the loaded state of the bulk material, and therefore hunting may occur if the watering amount is constantly controlled. Therefore, it is preferable to measure the amount of conveyed bulk material for a predetermined period (for example, several tens of seconds), calculate an average value of the amount of conveyed bulk material in the predetermined period, and control the amount of water sprayed based on the calculated value. Thereby, hunting can be prevented. Moreover, hunting can also be prevented by changing the amount of sprinkling in a stepwise manner with respect to the amount of conveyed bulk material as described above.
[0040]
The conveyor scale 37 as the detection means is preferably provided on the boom conveyor 16 on the upstream side of the loose article conveyance path 13, but the present invention is not limited in this respect and is difficult to provide on the boom conveyor 16. May be provided on the in-machine conveyor 17 or the ground conveyor 18. When the conveyor scale 37 is provided on the in-machine conveyor 17 or the ground conveyor 18, the amount of bulk material transported is measured after the bulk material passes through the first chute 20 a, and although there is a slight delay in controlling the amount of water spray, The effect can be sufficiently obtained as compared with the conventional one in which the amount of water is constant.
[0041]
Up to now, the conveyor scale for measuring the weight of the roses placed on the conveyor has been described as the detecting means 37, but other means may be used.
[0042]
For example, by detecting the drive load of the drive motor 11 that circulates and drives the bucket conveyor 9 of the bucket elevator 5, the weight of the rose object scraped off by the bucket elevator 5 is measured to calculate the amount of transferred article. Anyway. When the drive motor 11 is an electric motor, the current value of the object can be calculated by detecting the current value, and when the drive motor 11 is a hydraulic motor, the pressure is detected.
[0043]
Alternatively, the load of a motor (not shown) that drives the conveyors 16, 17, and 18 may be detected to calculate the amount of loose articles conveyed by the conveyors 16, 17, and 18.
[0044]
Furthermore, by measuring the hydraulic pressure of the hoisting cylinder 6 that supports the boom 4 of the continuous unloader 1, the amount of loose objects conveyed by the bucket elevator 5 and the boom conveyor 16 can be calculated.
[0045]
In addition, this invention is not limited to the bulk material conveyance path of a continuous unloader, For conveying the bulk material which dusts, such as coal generate | occur | produce, and the bulk material conveyed by the conveyor are guided to the next conveyor Needless to say, the present invention can be applied to any bulk object carrying amount provided with a chute.
[0046]
【The invention's effect】
In short, according to the present invention, an excellent effect that an appropriate amount of watering can always be performed is exhibited.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a continuous unloader to which an embodiment of the present invention is applied.
2 is a schematic diagram of a loose article conveyance path in the continuous unloader of FIG. 1. FIG.
FIG. 3 is a schematic view of a watering device according to an embodiment of the present invention.
FIG. 4 is a diagram showing the relationship between the amount of conveyed bulk goods and the amount of water spray.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Continuous unloader 5 Bucket elevator 13 Bulk material conveyance path 16 Boom conveyor 17 In-machine conveyor 18 Ground conveyor 20a First chute 20b Second chute 30 Sprinkling device 37 Detection means 39 Sprinkling amount control means

Claims (4)

It is provided in a bulk material conveyance path provided with a conveyor for transporting bulk material such as coal and a chute for guiding the bulk material transported by the conveyor to the next conveyor, and watering the bulk material passing through the chute In the sprinkler for the bulk material conveyance path to prevent dust,
The loose article conveyance path is provided in a continuous unloader including a boom and a bucket elevator provided at the tip of the boom, and receives loose articles such as coal scraped by the bucket elevator to the boom side. A rotary feeder that conveys the bulk material, a boom conveyor that is provided one level lower than the rotational feeder, receives the bulk material conveyed by the rotary feeder and horizontally conveys it, and guides the bulk material conveyed by the boom conveyor to the next conveyor. A first chute for the machine, an in-machine conveyor that receives and conveys the bulk material conveyed by the boom conveyor, and the bulk material conveyed by the in-machine conveyor to the next conveyor. With a second chute to guide,
A detecting means for detecting the transport amount of the rose article is provided in the loose article transport path, and a nozzle is provided in each of the first and second chutes, and the amount of water sprayed from each nozzle according to the detection value of the detecting means. A sprinkler for a rose transportation path, characterized by comprising a sprinkling amount control means for changing the water.   The sprinkling device for a loose article conveyance path according to claim 1, wherein the detection means detects the amount of loose article conveyance by measuring the weight of the loose article placed on the belt of the conveyor.   The sprinkling device for a bulk material conveyance path according to claim 1 or 2, wherein the detection means calculates an average value of the bulk material conveyance amount in a predetermined period and uses the calculated value as the detection value. The sprinkling device for a loose article conveyance path according to any one of claims 1 to 3, wherein the detection means detects a loose article conveyance amount by the bucket elevator by measuring a driving load of a drive motor that circulates and drives the bucket elevator.

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