JP3970410B2 - Flour detection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dusting detection device for judging the properties of dusting discharged at the time of punching and performing punching control of a punching machine.
[0002]
[Prior art]
Drilling machines are used to drill blast holes in rocks at sites such as mines, quarrying, and civil engineering. The drilling machine includes a striking mechanism and a rotation mechanism, and a rod is attached to the front end. When drilling, the striking mechanism and the rotation mechanism puncture and rotate the bit at the tip of the rod.
[0003]
At this time, the tip of the bit crushes the rock to generate dust. The generated dust is usually discharged out of the hole by a blower, and is classified into a coarse particle and a fine one by a dust collector and collected.
[0004]
The discharged dust is an important index for the operator to judge whether the drilling state of the drilling machine is good or bad.
For example, if the amount of dusting discharged is extremely small or not discharged at all, it is determined that the drilling is not performed smoothly.
[0005]
Moreover, it is judged that it is in the state where the hole is rough when there are many powders with a comparatively coarse particle size and there are extremely few fine powders from the particle size structure of a powdered powder. In such a case, residual dusting may increase, and a blasting hole having a desired drilling length cannot be completed.
[0006]
Therefore, the operator must always perform the drilling operation while monitoring the properties of the dusting such as the amount of discharged dust and the composition of the particle size during the drilling operation.
[0007]
[Problems to be solved by the invention]
Such monitoring of the properties of the dusting has been performed by visual inspection of the worker in the past, so that the worker's fatigue becomes large, and the determination of the drilling state depends on the operator's experience and intuition. Therefore, there is a problem that the quality of the drill hole depends on the skill level of the operator.
[0008]
This invention solves such a problem in drilling work, and by detecting the properties of the dusting discharged during drilling, drilling control of the drilling machine is facilitated, and operator fatigue is reduced. An object of the present invention is to provide a dusting detection device for reducing the dust.
[0009]
[Means for Solving the Problems]
The dust detection device of the present invention stores in advance a pressure sensor disposed in the middle of a dust conveyance path of a dust collector that collects the dust, and dusting property data corresponding to the detected pressure value of the pressure sensor. , And a judgment unit for judging the properties of the dusting by comparing the pressure value detected by the pressure sensor at the time of drilling and the dusting property data.
[0010]
Flouring generated during drilling is discharged out of the hole by a blower, and is classified into a large particle size and a fine one by a dust collector and collected. At this time, the pressure sensor arranged in the middle of the dust feeding path of the dust collector detects the pressure of the air flow that carries the dust and sends the data to the determination unit. The determination unit compares the detected pressure value with the previously stored dusting property data to determine the property of dusting.
[0011]
By displaying the properties of the obtained dusting on a display device or the like, the operator can determine the drilling state and directly perform the drilling operation without directly monitoring the dusting.
If the warning signal of the drilling state is output based on the properties of the dusting at the time of drilling from the judgment unit, the operator can know the change in the drilling state, and drilling control becomes easy.
[0012]
If you have a drilling control device that automatically controls the drilling operation of the drilling machine, you can send the data of the properties of the dusting at the time of drilling from the judgment unit to the drilling control device, Smooth automatic drilling control that responds quickly to changes in drilling conditions becomes possible.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view of a crawler drill equipped with a dusting detection device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of the arrangement of pressure sensors, and FIG. 3 is a block diagram showing the configuration of the dusting detection device is there.
[0014]
The crawler drill 1 includes a boom 3 at the front portion of the carriage 2, and a guide shell 5 on which a rock drill 4 is mounted is supported at the tip of the boom 3. The rock drill 4 includes a striking mechanism 6 and a rotation mechanism 7, and feed is given by a feed mechanism 8 provided on the guide shell 5 and moves back and forth along the guide shell 5. The rock drill 4 is fitted with a rod 10 with a bit 9 attached to the tip.
[0015]
The crawler drill 1 includes a dust collecting device 11 for collecting the dust D. Dust collector 11 includes a suction cap 12 provided at the tip end of the guide shell covering the drilling mouth, a precleaner 13 for trapping coarse Kukona D _L granularity, fine Kukona D _S of the particle size It consists of a dust collector 14 that collects, and the dust caps 14 and 16 are connected between the suction cap 12 and the precleaner 13 and between the precleaner 13 and the dust collector 14.
[0016]
The dust collector 14 is provided with a fan 17 for sucking the dust D. The dust D generated by the drill holes and discharged out of the hole by the blower is first fed from the suction cap 12 to the dust transfer pipe 15. is conveyed to the pre-cleaner 13 via, wherein after coarse Kukona D _L granular is collected, so that led to a dust collector 14 through the Kukona transport tube 16 where fine Kukona D _S is collected It has become.
[0017]
In the middle of the dust conveyance path of the dust collector 11, the pressure of the airflow that conveys the dust D is detected at four locations: the outlet of the suction cap 12, the inlet and outlet of the precleaner 13, and the inlet of the dust collector 14. Pressure sensors S ₁ , S ₂ , S ₃ , S ₄ are arranged respectively.
[0018]
In addition, a determination unit 20 is provided in the control panel 19 installed on the carriage 2. The determination unit 20 includes a memory 21 that preliminarily stores dusting property data, and detected pressure values P ₁ , P ₂ , P ₃ , and P ₄ of the pressure sensors S ₁ , S ₂ , S ₃ , and S _{4 when} drilling. Comparing means 22 for determining the properties of the dusting D by comparing with the dusting property data stored in the memory 21. The determination result of the properties of the dusting D obtained by the determination unit 20 is sent to the display device 23 and displayed.
[0019]
At the time of drilling, the striking mechanism 6 and the rotating mechanism 7 punch and drill the bit 9 at the tip of the rod 10.
At this time, the tip of the bit 9 breaks the rock and generates the flour D. The generated flour D is discharged out of the hole by the blower of the rock drill 4 and is first transported from the suction cap 12 to the pre-cleaner 13 through the flour-feeding tube 15, and the coarse powdered flour D _L is pre-cleaned 13. Collected by. Thereafter, fine Kukona D _S un trapping is led to a dust collector 14 through the Kukona conveying pipe 16 minute Kukona D _S here is collected.
[0020]
At this time, the pressure sensors S ₁ , S ₂ , S ₃ , S ₄ arranged in the middle of the dust feeding path of the dust collector 11 detect the pressure of the airflow that carries the dust D at each position. The pressure detection values P ₁ , P ₂ , P ₃ , and P ₄ are sent to the determination unit 20. In the determination unit 20, the comparison means 22 compares the pressure detection values P ₁ , P ₂ , P ₃ , P ₄ with the dusting property data stored in advance in the memory 21 to determine the property of the dusting D. To do.
[0021]
To determine the properties of the flour D, for example,
P ₄ −P ₁ = ΔP _{4 1} (1)
P ₂ −P ₁ = ΔP _{2 1} (2)
P ₄ −P ₃ = ΔP _{4 3} (3)
Then, from Formula (1), the presence or absence of the dust D in the conveyance path can be determined. That is,
ΔP _{4 1} > k _{4 1} (k _{4 1} is a constant) (4)
Can be determined that dusting D exists in the transport path,
ΔP _{4 1} <k _{4 1} (5)
When it becomes, it can be judged that the dust D does not exist in a conveyance path | route.
[0022]
When the powder D is not present in the transport path, there is a high possibility that the rock crushed in the drill hole is not discharged out of the hole and is accumulated in the hole. In such a case, a failure such as the rod being impossible to recover is likely to occur and the blast hole cannot be completed.
[0023]
Furthermore, from the formulas (2) and (3), the state of the particle size of the dusting is known. That is,
ΔP _{2 1} > k _{2 1} (k _{2 1} is a constant) (6)
ΔP _{4 3} <k _{4 3} (k _{4 3} is a constant) (7)
Is satisfied, it can be determined from the formula (6) that the powdered powder D is present in the powdered conveying line 15 and from the expression (7) that the powdered powder D is not present in the powdered conveying line 16.
[0024]
That is, it is considered that the bedrock is in a rough state in which only the coarsely-pulverized flour D _L is discharged, and the finely-pulverized flour D _S is not discharged. In such a case, the hole wall is liable to collapse, resulting in an increase in residual dusting and the desired drilling length may not be obtained.
[0025]
Further, it is possible to determine clogging in the transport path from the pressure detection values P ₁ , P ₂ , P ₃ , and P _{4 of} each sensor.
Thus, the judgment data on the amount of dusting, the particle size, or the properties obtained by combining them are sent to the display device 23 for display, so the operator directly monitors the dusting D. The drilling state can be determined and drilling operation can be performed without doing so. Therefore, the drilling control of the drilling machine 4 is facilitated, and the operator's fatigue can be reduced.
[0026]
If the warning signal of the drilling state is output from the judgment unit 20 based on the properties of the dusting D at the time of drilling, the operator can know the change in the drilling state and cope with the trouble. Hole control becomes easier and the quality of drilling is less affected by the skill level of the operator.
[0027]
Some crawler drills 1 include a drilling control device that automatically controls the drilling operation of the drilling machine 4. Usually, the automatic drilling control device performs drilling control based on changes in the rotational resistance and thrust of the rock drill 4. When the crawler drill 1 is provided with an automatically controlled drilling hole control device, as shown in FIG. 4, the judgment unit 20 sends data on the properties of the dusting during drilling to the drilling hole control device 24. Then, trouble can be avoided by the operation programmed in advance based on the change in the properties of the dusting and powdering D, and smooth drilling control that responds quickly to changes in the drilling state becomes possible.
[0028]
【The invention's effect】
As described above, according to the dust detection device of the present invention, the drilling control of the rock drill is facilitated by detecting the properties of the dust discharged during drilling, and the fatigue of the operator is reduced. can do.
[Brief description of the drawings]
FIG. 1 is a perspective view of a crawler drill provided with a dusting detecting device according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram of an arrangement of pressure sensors.
FIG. 3 is a block diagram showing a configuration of a dusting detection device.
FIG. 4 is a block diagram showing a configuration of a dusting detection device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Crawler drill 2 Carriage 3 Boom 4 Rock drill 5 Guide shell 6 Blowing mechanism 7 Rotating mechanism 8 Feeding mechanism 9 Bit 10 Rod 11 Dust collector 12 Suction cap 13 Precleaner 14 Dust collector 15 Dust conveying pipe 16 Dust conveying pipe 17 Fan 20 Judgment part 21 Memory 22 Comparing means 23 Display device 24 Drilling hole control device D Flour dust D _L coarse particle dust D _S Fine dust S ₁ Pressure sensor S ₂ Pressure sensor S ₃ Pressure sensor S ₄ Pressure sensor

Claims (1)

The pressure sensor arranged in the middle of the dust feeding path of the dust collector that collects the dust and the dusting property data corresponding to the detected pressure value of the pressure sensor are stored in advance, and the pressure sensor detects when drilling. A dusting detection device comprising: a judgment unit that compares the pressure value and the dusting property data to determine the property of dusting.

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