CN114017119A - Coal seam thickness detection equipment and control method thereof - Google Patents
Coal seam thickness detection equipment and control method thereof Download PDFInfo
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- CN114017119A CN114017119A CN202111256651.3A CN202111256651A CN114017119A CN 114017119 A CN114017119 A CN 114017119A CN 202111256651 A CN202111256651 A CN 202111256651A CN 114017119 A CN114017119 A CN 114017119A
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- 239000003245 coal Substances 0.000 title claims abstract description 235
- 238000001514 detection method Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000004677 Nylon Substances 0.000 claims description 30
- 229920001778 nylon Polymers 0.000 claims description 30
- 230000007246 mechanism Effects 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 5
- 238000005065 mining Methods 0.000 description 18
- 230000005251 gamma ray Effects 0.000 description 7
- 239000011435 rock Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/24—Remote control specially adapted for machines for slitting or completely freeing the mineral
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Length Measuring Devices By Optical Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
Abstract
The invention discloses coal seam thickness detection equipment and a control method thereof. The coal seam thickness detection equipment and the control method thereof disclosed by the invention can automatically track the fluctuation change of the bottom surface of the rest coal seam and automatically adjust, so that the coal seam thickness detection device and the bottom surface of the rest coal seam are kept at a preset distance, and the detection accuracy of the coal seam thickness detector is improved.
Description
Technical Field
The invention relates to an automatic underground coal rock boundary identification system, in particular to coal seam thickness detection equipment capable of automatically adjusting height and a control method thereof.
Background
The coal cutter cuts the top and bottom plate rocks, which causes a series of problems of shortened cutting tooth service life, reduced coal quality and production efficiency, increased gas explosion risk and the like. The accurate recognition of the coal rock interface is a key technology for realizing the self-adaptive height adjustment of the rocker arm of the coal mining machine and avoiding cutting of a top floor rock stratum, and is also the basis of the intellectualization of a coal mining working face.
The coal rock boundary automatic identification system based on the natural gamma ray detection principle detects the thickness of the residual coal bed through the coal bed thickness detector, and the coal mining machine adjusts the height of the rocker arm according to the thickness of the residual coal bed so as to prevent the cutting drum from cutting the rock.
In the prior art, the working height of the coal seam thickness detector is fixed, and the intensity of the ray received by the coal seam thickness detector is related to the distance between the coal seam thickness detector and the top plate. The closer the distance between the coal seam thickness detector and the bottom surface of the rest coal seam is, the higher the ray intensity received by the coal seam thickness detector is; the farther the distance between the coal seam thickness detector and the bottom surface of the rest coal seam is, the weaker the intensity of the ray received by the coal seam thickness detector is. Therefore, when the coal mining machine moves, the height of the bottom surface of the rest coal seam is fluctuated, so that the distance between the coal seam thickness detector and the bottom surface of the rest coal seam is changed, the detected coal seam thickness information has errors, and the detection accuracy of the coal seam thickness detector is influenced.
In view of the above, it is necessary to provide a coal seam thickness detecting apparatus capable of automatically tracking and adjusting the fluctuation of the bottom surface of the remaining coal seam, and a control method thereof.
Disclosure of Invention
The invention aims to provide coal seam thickness detection equipment capable of automatically tracking fluctuation of the bottom surface of a residual coal seam to adjust and a control method thereof.
The technical scheme of the invention provides coal seam thickness detection equipment which comprises a coal seam thickness detection device, an infrared distance measurement device, a lifting device and an adjusting mechanism, wherein the infrared distance measurement device is arranged on one side of the coal seam thickness detection device;
the coal seam thickness detection device comprises a nylon box body, a lead box body connected above the nylon box body, a signal processor arranged in the nylon box body and a coal seam thickness detector arranged in the lead box body;
a nylon end cover is arranged on an opening at the top of the lead box body, an elastic piece is arranged at the bottom of the lead box body, and the coal seam thickness detector is supported by the elastic piece;
the infrared distance measuring device comprises a fixed support and an infrared distance measuring instrument connected with the fixed support, and the fixed support is connected to one side of the lead box body;
the top detection end of the infrared distance meter is flush with the top detection end of the coal seam thickness detector;
the lifting device comprises a lifting device outer sleeve, a lifting device inner sleeve, a lifting oil cylinder and an oil cylinder controller for controlling the working of the lifting oil cylinder;
the lifting device outer sleeve is connected with the adjusting mechanism, the lifting device inner sleeve is connected with the lifting device outer sleeve in a sliding mode, the lifting oil cylinder is installed in the lifting device outer sleeve, a piston rod of the lifting oil cylinder is connected with the lifting device inner sleeve, and the lifting device inner sleeve is connected with the nylon box body;
the oil cylinder controller, the infrared distance meter and the coal seam thickness detector are respectively connected with the signal processor.
In an optional technical solution, the outer sleeve of the lifting device is hinged to the adjusting mechanism, and a swing oil cylinder for driving the outer sleeve of the lifting device to swing is further hinged between the adjusting mechanism and the outer sleeve of the lifting device.
In an alternative technical solution, the adjusting mechanism includes a base device and a telescopic device connected to the base device, and the outer sleeve of the lifting device is connected to the telescopic device.
In one optional technical scheme, the telescopic device comprises a telescopic device outer sleeve, a telescopic device inner sleeve and a telescopic oil cylinder;
the telescopic device outer sleeve is connected with the base device, the telescopic device inner sleeve is connected with the telescopic device outer sleeve in a sliding mode, the telescopic oil cylinder is installed in the telescopic device outer sleeve, a piston rod of the telescopic oil cylinder is connected with the telescopic device inner sleeve, and the lifting device outer sleeve is connected with the telescopic device inner sleeve.
In an optional technical solution, the outer sleeve of the telescopic device is hinged to the base device, and a supporting cylinder for supporting the outer sleeve of the telescopic device is further connected between the base device and the outer sleeve of the telescopic device.
In an alternative technical solution, the base device includes a chassis and a turntable pivotally mounted on the chassis, and the telescopic device is connected with the turntable.
In one optional technical scheme, a chassis fixing plate is mounted on the chassis, and a plurality of turntable fixing discs are mounted on the turntable at intervals along the circumferential direction;
one of the turntable fixing discs is connected with the chassis fixing plate through a bolt.
In an optional technical scheme, a U-shaped guard plate for a liquid supply pipeline to penetrate through is arranged on the telescopic device.
In one optional technical scheme, a rubber gasket is arranged on the bottom surface of the nylon top cover.
The technical scheme of the invention also provides a control method of the coal seam thickness detection equipment, which comprises the following steps:
s01: the signal processor is preset with a preset distance H between the coal seam thickness detector and the bottom surface of the rest coal seam0；
S02: monitoring real-time distance H between coal seam thickness detector and bottom surface of residual coal seam by infrared distance meter1And will measure the real-time distance H1Transmitted to a signalA processor for comparing and judging the real-time distance H1At a predetermined distance H0；
Such as H1＜H0The signal processor sends a descending signal to the oil cylinder controller, the piston rod of the lifting oil cylinder descends to drive the coal seam thickness detection device to descend by the distance H0-H1；
Such as H1＞H0The signal processor sends a rising signal to the oil cylinder controller, a piston rod of the lifting oil cylinder rises, and the coal seam thickness detection device is driven to rise by a distance H1-H0。
By adopting the technical scheme, the method has the following beneficial effects:
according to the coal seam thickness detection device and the control method thereof provided by the invention, the infrared distance measuring device is arranged on the side surface of the coal seam thickness detection device, the coal seam thickness detection device measures the thickness of the residual coal seam, the infrared distance measuring device measures the distance between the coal seam thickness detection device and the bottom surface of the residual coal seam, when the distance between the coal seam thickness detection device and the bottom surface of the residual coal seam is smaller than a preset value, the coal seam thickness detection device is lowered through the lifting device, and when the distance between the coal seam thickness detection device and the top plate is larger than the preset value, the coal seam thickness detection device is lifted through the lifting device, so that the coal seam thickness detection device and the bottom surface of the residual coal seam are kept at the preset distance, and the measurement accuracy is improved.
Therefore, the coal seam thickness detection equipment and the control method thereof provided by the invention can automatically track the fluctuation change of the bottom surface of the rest coal seam and automatically adjust, so that the coal seam thickness detection device and the bottom surface of the rest coal seam are kept at a preset distance, and the detection accuracy of the coal seam thickness detector is improved.
Drawings
Fig. 1 is a schematic structural diagram of a coal seam thickness detecting apparatus provided in an embodiment of the present invention in a first state, in which a telescopic device extends obliquely upward;
fig. 2 is a schematic structural diagram of a coal seam thickness detecting apparatus provided in an embodiment of the present invention in a second state, in which a telescopic device extends horizontally;
fig. 3 is a schematic structural diagram of a coal seam thickness detecting apparatus provided in an embodiment of the present invention in a third state, in which a telescopic device extends vertically upward;
FIG. 4 is a schematic diagram of the connection of the coal seam thickness detection device, the infrared distance measuring device and the lifting device;
FIG. 5 is a cross-sectional view of a coal seam thickness detection device and a lifting device;
FIG. 6 is a schematic view of the adjustment mechanism;
FIG. 7 is a schematic view of a swing cylinder hinged between the adjusting mechanism and the outer sleeve of the lifting device;
fig. 8 is a schematic diagram of a coal seam thickness detecting device provided in an embodiment of the present invention when detecting the thickness of a remaining coal seam.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1 to 5 and 8, the coal seam thickness detecting apparatus according to an embodiment of the present invention includes a coal seam thickness detecting device 1, an infrared distance measuring device 2 installed at one side of the coal seam thickness detecting device 1, a lifting device 3 for driving the coal seam thickness detecting device 1 to move up and down linearly, and an adjusting mechanism 4 for adjusting a position of the lifting device 3.
The coal seam thickness detection device 1 comprises a nylon box body 11, a lead box body 12 connected above the nylon box body 11, a signal processor 13 installed in the nylon box body 11 and a coal seam thickness detector 14 installed in the lead box body 12.
A nylon end cover 15 is installed on the top opening of the lead case 12, an elastic piece 16 is installed at the bottom of the lead case 12, and the coal seam thickness detector 14 is supported by the elastic piece 16.
The infrared distance measuring device 2 comprises a fixed support 21 and an infrared distance measuring instrument 22 connected with the fixed support 21, wherein the fixed support 21 is connected to one side of the lead box body 12.
The top detection end of the infrared distance meter 22 is flush with the top detection end of the coal seam thickness detector 14.
The lift device 3 includes a lift outer sleeve 31, a lift inner sleeve 32, a lift cylinder 33, and a cylinder controller 34 for controlling the operation of the lift cylinder 33.
The outer elevator sleeve 31 is connected with the adjusting mechanism 4, the inner elevator sleeve 32 is slidably connected with the outer elevator sleeve 31, the elevator cylinder 33 is installed in the outer elevator sleeve 31, and the piston rod 331 of the elevator cylinder 33 is connected with the inner elevator sleeve 32. The inner sleeve 32 of the lifting device is connected with the nylon box body 11.
The cylinder controller 34, the infrared distance meter 22 and the coal seam thickness detector 14 are respectively connected with the signal processor 13.
The coal seam thickness detection equipment provided by the invention is used for detecting the thickness of the residual coal seam 8 below the top plate 9 and arranged on a coal mining machine, and can automatically track the fluctuation change of the bottom surface of the residual coal seam 8 and automatically adjust the fluctuation change.
The coal seam thickness detection device comprises a coal seam thickness detection device 1, an infrared distance measurement device 2, a lifting device 3 and an adjusting mechanism 4.
The coal seam thickness detection device 1 detects the thickness of the remaining coal seam 8 below the roof 9 by means of its coal seam thickness detector 14.
The infrared distance measuring device 2 is used for measuring the distance between the coal seam thickness detector 14 and the bottom surface of the residual coal seam 8.
The lifting device 3 is used for driving the coal seam thickness detection device 1 to move up and down so that the distance between the coal seam thickness detection instrument 14 and the bottom surface of the residual coal seam 8 is kept at the optimal preset distance H0。
The adjusting mechanism 4 is used for adjusting the position of the lifting device 3 so as to drive the coal seam thickness detecting device 1 to move to a proper position below the residual coal seam 8.
The coal seam thickness detection device 1 comprises a nylon box body 11, a lead box body 12, a signal processor 13, a coal seam thickness detector 14, a nylon end cover 15 and an elastic piece 16.
The nylon box body 11 is arranged on the lifting device 3, and the signal processor 13 is arranged in the nylon box body 11. The nylon box 11 can reduce the interference to the signal. A lead box 12 is installed on the nylon box 11, and a coal seam thickness detector 14 is installed in the lead box 12. The coal seam thickness detector 14 detects the coal seam thickness by using a gamma ray detection principle, and for the gamma ray detection principle, reference may be made to the contents in the prior art, and details thereof are not described herein. The lead case 12 is a case made of lead and can shield rays. The top of the lead box body 12 is provided with a top opening, the nylon end cover 15 is installed on the top opening of the lead box body 12, and the top end of the coal seam thickness detector 14 is a gamma ray detection end for emitting and receiving gamma rays. The gamma ray detection end of the coal seam thickness detector 14 faces the nylon end cover 15, gamma rays are emitted and returned through the nylon end cover 15, and the nylon end cover 15 can reduce shielding interference on the gamma rays. An elastic member 16 is installed at the bottom of the lead casing 12 and supports the coal seam thickness gauge 14 so that damage to the coal seam thickness gauge 14 due to vibration can be prevented. The elastic member 16 may be selected as a damping spring. The bottom of the coal seam thickness detector 14 is provided with a retainer ring 18, the upper end of the elastic element 16 is connected with the retainer ring 18, and the lower end of the elastic element 16 is connected with the bottom plate of the lead box body 12.
The infrared distance measuring device 2 comprises a fixed support 21 and an infrared distance measuring instrument 22, the fixed support 21 is connected to one side of the lead box body 12, and the infrared distance measuring instrument 22 is connected to the fixed support 21. The infrared distance meter 22 measures a distance using infrared rays, and has an infrared detection end at the top end thereof for transmitting and receiving infrared rays. The lens of the infrared distance meter 22 is provided with a glass protective cover, and the thickness of the glass protective cover is more than 1 cm. The clearance between the glass protective cover and the lens is between 5 and 6 mm. The glass protective cover plays a role in protecting the lens so as to prevent the lens from being stained by coal dust falling in a mine and cause inaccurate measuring results.
The infrared detection end of the infrared distance meter 22 is flush with the gamma ray detection end of the coal seam thickness detector 14, that is, the infrared detection end of the infrared distance meter 22 and the gamma ray detection end of the coal seam thickness detector 14 are located on the same horizontal plane, and the distance between the infrared distance meter 22 and the bottom surface of the remaining coal seam 8 is equal to the distance between the coal seam thickness detector 14 and the bottom surface of the remaining coal seam 8, so as to accurately measure the distance between the coal seam thickness detector 14 and the bottom surface of the remaining coal seam 8.
The lift device 3 includes a lift device outer sleeve 31, a lift device inner sleeve 32, a lift cylinder 33, and a cylinder controller 34. The cylinder controller 34 is used to control the valve of the lift cylinder 33 to control the lifting of the piston rod 331 of the lift cylinder 33. The inner elevator sleeve 32 is slidably connected to the outer elevator sleeve 31, and the inner elevator sleeve 32 is protruded from the outer elevator sleeve 31. The lift cylinder 33 is mounted in the outer lift sleeve 31, and the outer lift sleeve 31 protects the lift cylinder 33. The piston rod 331 of the lift cylinder 33 is connected to the inner sleeve 32 of the lift device, and the extension and contraction of the piston rod 331 can drive the extension and contraction of the inner sleeve 32 of the lift device. The stretching of the inner sleeve 32 of the lifting device can drive the nylon box 11 to lift, and further drive the coal seam thickness detection device 1 to lift up and down integrally, so as to adjust the height of the coal seam thickness detection instrument 14.
The outer sleeve 31 of the lifting device is connected with the adjusting mechanism 4, the position of the lifting device 3 is adjusted by the adjusting mechanism 4, and the coal seam thickness detecting device 1 and the infrared distance measuring device 2 are driven to move to a proper position below the residual coal seam 8.
The oil cylinder controller 34, the infrared distance measuring instrument 22 and the coal seam thickness detecting instrument 14 are respectively connected with the signal processor 13 through leads so as to realize signal transmission.
The infrared distance meter 22 measures the real-time distance H between the infrared distance meter and the bottom surface of the remaining coal seam 81To the signal processor 13. The coal seam thickness detector 14 detects the real-time thickness h of the residual coal seam 83To the signal processor 13.
The signal processor 13 compares the real-time distance H1A preset distance H pre-stored before0Comparing and judging, sending a corresponding signal to the cylinder controller 34 according to the judgment result to adjust the elevation of the piston rod 331, so as to drive the coal seam thickness detector 14 to move, so that the coal seam thickness detector 14 and the bottom surface of the residual coal seam 8 are kept at the preset distance H0According to the actual operating conditions，H0Values of 300mm, 500mm, etc. may be selected.
The signal processor 13 converts the residual coal seam thickness h3And transmitting the data to a controller of the coal mining machine, comparing the data with the prestored coal seam thickness range, adjusting the height of a rocker arm of the coal mining machine according to the residual coal seam thickness h, and then driving a cutting drum to adjust the cutting depth so as to avoid cutting to a top plate 9 above the residual coal seam 8. Assuming that the thickness of the coal seam ranges from h1—h2E.g. h1≤h3≤h2The height of the rocker arm of the coal mining machine does not need to be adjusted; such as h3≤h1The height of the rocker arm of the coal mining machine needs to be adjusted to be low; such as h3≥h2The height of the shearer arm can be correspondingly increased, but it is ensured that the shearer arm does not cut the roof 9 above the remaining coal seam 8.
During the use, adjustment mechanism 4 installs on the fuselage of coal-winning machine, and along with the antedisplacement of coal-winning machine, the distance between the bottom surface of the surplus coal seam 8 of height fluctuation and coal seam thickness detection instrument 14 can change, consequently need adjust the height of coal seam thickness detection instrument 14, and its regulative mode is as follows:
the signal processor 13 presets a preset distance or an optimal distance H between the coal seam thickness detector 14 and the bottom surface of the remaining coal seam 80。
The infrared distance meter 22 monitors the real-time distance H between the coal seam thickness detector 14 and the bottom surface of the remaining coal seam 8 in real time as the coal mining machine moves1. The infrared range finder 22 measures the real-time distance H1To the signal processor 13. The signal processor 13 processes the real-time distance H1At a predetermined distance H0And (4) carrying out comparison and judgment:
such as H1＜H0If the distance between the coal seam thickness detector 14 and the bottom surface of the residual coal seam 8 is too small, the signal processor 13 sends a descending signal to the cylinder controller 34, the piston rod 331 of the lifting cylinder 33 descends, and the coal seam thickness detection device 1 is driven to descend by the distance H0-H1To adjust the distance between the coal seam thickness gauge 14 and the bottom surface of the remaining coal seam 8 to H0。
Such as H1＞H0If the distance between the coal seam thickness detector 14 and the bottom surface of the residual coal seam 8 is too large, the signal processor 13 sends a rising signal to the cylinder controller 34, the piston rod 331 of the lifting cylinder 33 rises, and the coal seam thickness detecting device 1 is driven to rise by the distance H1-H0To adjust the distance between the coal seam thickness gauge 14 and the bottom surface of the remaining coal seam 8 to H0。
In one embodiment, as shown in fig. 1-2 and 7, the outer elevator sleeve 31 is hinged to the adjusting mechanism 4, and a swing cylinder 5 for driving the outer elevator sleeve 31 to swing is further hinged between the adjusting mechanism 4 and the outer elevator sleeve 31.
The swing cylinder 5 is hinged between the inner telescoping device sleeve 422 of the adjusting mechanism 4 and the outer jacking device sleeve 31 of the jacking device 3 for adjusting the angle of the jacking device 3 so that the jacking device 3 remains upright to be perpendicular to the ground so that the top detecting end of the infrared distance meter 22 and the top detecting end of the coal seam thickness detector 14 are both upright facing upwards to face the bottom surface of the remaining coal seam 8.
In one embodiment, as shown in fig. 1-3, the adjustment mechanism 4 includes a base assembly 41 and a retractor 42 coupled to the base assembly 41, and the elevator outer sleeve 31 is coupled to the retractor 42.
The adjusting mechanism 4 comprises a base device 41 and a telescopic device 42, the base device 41 is used for being installed on the body of the coal mining machine, the lower end of the telescopic device 42 is connected to the base device 41, the lifting device 3 is installed at the upper end of the telescopic device 42, and the lifting device 3 is driven by the telescopic device 42 to be adjusted below the residual coal seam 8.
In one embodiment, as shown in fig. 1-3 and 6, telescoping device 42 includes a telescoping device outer sleeve 421, a telescoping device inner sleeve 422, and a telescoping cylinder 423.
The outer telescoping device sleeve 421 is connected with the base device 41, the inner telescoping device sleeve 422 is slidably connected with the outer telescoping device sleeve 421, the telescoping cylinder 423 is installed in the outer telescoping device sleeve 421, the piston rod 4231 of the telescoping cylinder 423 is connected with the inner telescoping device sleeve 422, and the outer lifting device sleeve 31 is connected with the inner telescoping device sleeve 422.
In this embodiment, the telescoping device 42 includes a telescoping device outer sleeve 421, a telescoping device inner sleeve 422, and a telescoping cylinder 423. The telescoping device outer sleeve 421 is connected to the base unit 41. The telescopic cylinder 423 is arranged in the telescopic device outer sleeve 421, and the telescopic device outer sleeve 421 plays a role in protecting the telescopic cylinder 423. The telescopic device inner sleeve 422 is slidably connected with the telescopic device outer sleeve 421, a piston rod 4231 of the telescopic cylinder 423 is connected with the telescopic device inner sleeve 422, and the lifting device outer sleeve 31 is connected with the upper end of the telescopic device inner sleeve 422.
When the piston rod 4231 extends and contracts, the inner telescoping device sleeve 422 is driven to extend and contract relative to the outer telescoping device sleeve 421, so as to adjust the position of the lifting device 3.
In one embodiment, as shown in fig. 1-2 and 6, the outer sleeve 421 of the telescopic device is hinged to the base device 41, and a support cylinder 6 for supporting the outer sleeve 421 of the telescopic device is connected between the base device 41 and the outer sleeve 421 of the telescopic device.
The arrangement is such that the outer telescopic means sleeve 421 can be swung relative to the base means 41 by the support cylinder 6 to assume the inclined condition shown in figure 1, the horizontal condition shown in figure 2 and the vertical condition shown in figure 3. No matter what state the telescopic device 42 is, the lifting device 3 can be in a vertical state under the action of the swing oil cylinder 5.
In one embodiment, as shown in fig. 1-3 and 6, the base unit 41 includes a chassis 411 and a turntable 412 pivotally mounted on the chassis 411, and the telescoping unit 42 is connected to the turntable 412.
In this embodiment, the base device 41 adopts a rotary base, and can drive the telescopic device 42 to rotate in the horizontal plane, so as to drive the lifting device 3, the infrared distance measuring device 2 and the coal seam thickness detecting device 1 to rotate to a proper position below the remaining coal seam 8.
The base device 41 comprises a chassis 411 and a turntable 412, the chassis 411 is used for being installed on the body of the coal mining machine, the turntable 412 is installed on the chassis 411 through a bearing, and the turntable 412 can rotate on the chassis 411. A driving motor is installed at one side of the base plate 411, and a gear ring is provided on the outer circumferential surface of the turntable 412. A reduction gear set is arranged between the output end of the driving motor and the gear ring to drive the turntable 412 to rotate on the chassis 411.
In one embodiment, as shown in fig. 1-3 and 6, a chassis fixing plate 413 is mounted on the chassis 411, and a plurality of turntable fixing discs 414 are mounted on the turntable 412 at intervals along the circumferential direction. One of the turntable fixing disks 414 is connected with the chassis fixing plate 413 through a bolt. When the turntable 412 rotates to a certain angle, a turntable fixing disk 414 is always aligned with the chassis fixing plate 413, and then the turntable fixing disk 414 is connected with the chassis fixing plate 413 through a bolt, so that the turntable 412 and the chassis 411 are relatively fixed, and the stable operation is ensured.
In one embodiment, as shown in FIGS. 1-3 and 7, the telescoping device 42 is provided with a U-shaped shield 424 for the passage of the liquid supply duct. The U-shaped guard plate 424 is mounted on the outer sleeve 421 of the telescopic device, and the oil pipe 35 of the lift cylinder 33 and the liquid supply pipe 51 of the swing cylinder 5 pass through the U-shaped guard plate 424, and the liquid supply pipe is protected by the U-shaped guard plate 424.
In one embodiment, as shown in fig. 5, a rubber gasket 17 is disposed on the bottom surface of the nylon roof 15 to protect the coal seam thickness detector 14 from directly colliding with the nylon roof 15 at the top end of the coal seam thickness detector 14 in case of vibration.
Referring to fig. 1 to 8, a method for controlling a coal seam thickness detecting apparatus according to any of the foregoing embodiments provided by an embodiment of the present invention includes the following steps:
s01: the signal processor 13 is preset with a preset distance H between the coal seam thickness detector 14 and the bottom surface of the residual coal seam 80。
S02: the infrared distance meter 22 monitors the real-time distance H between the coal seam thickness detector 14 and the floor of the remaining coal seam 81And will measure the real-time distance H1Transmitted to the signal processor 13, and the signal processor 13 compares and judges the real-time distance H1At a predetermined distance H0。
Such as H1＜H0Then the signal processor 13 sends a descending signal to the cylinder controller 34, and the piston rod 331 of the lifting cylinder 33 descends to drive the coal seam thicknessThe falling distance of the detecting device 1 is H0-H1。
Such as H1＞H0Then, the signal processor 13 sends a rising signal to the cylinder controller 34, and the piston rod 331 of the lift cylinder 33 rises to drive the coal seam thickness detecting device 1 to rise by the distance H1-H0。
When the coal seam thickness detecting device is used, the coal seam thickness detecting device is installed on a machine body of a coal mining machine and is positioned in a roadway.
The signal processor 13 presets a preset distance or an optimal distance H between the coal seam thickness detector 14 and the bottom surface of the remaining coal seam 80。
The infrared distance meter 22 monitors the real-time distance H between the coal seam thickness detector 14 and the bottom surface of the remaining coal seam 8 in real time as the coal mining machine moves1. The infrared range finder 22 measures the real-time distance H1To the signal processor 13. The signal processor 13 processes the real-time distance H1At a predetermined distance H0And (4) carrying out comparison and judgment:
such as H1＜H0If the distance between the coal seam thickness detector 14 and the bottom surface of the residual coal seam 8 is too small, the signal processor 13 sends a descending signal to the cylinder controller 34, the piston rod 331 of the lifting cylinder 33 descends, and the coal seam thickness detection device 1 is driven to descend by the distance H0-H1To adjust the distance between the coal seam thickness gauge 14 and the bottom surface of the remaining coal seam 8 to H0。
Such as H1＞H0If the distance between the coal seam thickness detector 14 and the bottom surface of the residual coal seam 8 is too large, the signal processor 13 sends a rising signal to the cylinder controller 34, the piston rod 331 of the lifting cylinder 33 rises, and the coal seam thickness detecting device 1 is driven to rise by the distance H1-H0To adjust the distance between the coal seam thickness gauge 14 and the bottom surface of the remaining coal seam 8 to H0。
The coal seam thickness detector 14 detects the real-time thickness h of the residual coal seam 83To the signal processor 13. The signal processor 13 converts the residual coal seam thickness h3Transmitted to the controller of the coal mining machine and compared with the pre-stored thickness range of the coal seam according toThe height of the rocker arm of the coal mining machine is adjusted by the thickness h of the remaining coal seam, and then the cutting drum is driven to adjust the cutting depth so as to avoid cutting to the top plate 9 above the remaining coal seam 8. Assuming that the thickness of the coal seam ranges from h1—h2E.g. h1≤h3≤h2The height of the rocker arm of the coal mining machine does not need to be adjusted; such as h3≤h1The height of the rocker arm of the coal mining machine needs to be adjusted to be low; such as h3≥h2The height of the shearer arm can be correspondingly increased, but it is ensured that the shearer arm does not cut the roof 9 above the remaining coal seam 8.
In summary, the coal seam thickness detection device and the control method thereof provided by the invention can automatically track the fluctuation of the bottom surface of the remaining coal seam to automatically adjust, so that the coal seam thickness detection device and the bottom surface of the remaining coal seam are kept at the preset distance, and the detection accuracy of the coal seam thickness detector is improved.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.
Claims (10)
1. The coal seam thickness detection equipment is characterized by comprising a coal seam thickness detection device, an infrared distance measurement device arranged on one side of the coal seam thickness detection device, a lifting device used for driving the coal seam thickness detection device to linearly lift and an adjusting mechanism used for adjusting the position of the lifting device;
the coal seam thickness detection device comprises a nylon box body, a lead box body connected above the nylon box body, a signal processor arranged in the nylon box body and a coal seam thickness detector arranged in the lead box body;
a nylon end cover is arranged on an opening at the top of the lead box body, an elastic piece is arranged at the bottom of the lead box body, and the coal seam thickness detector is supported by the elastic piece;
the infrared distance measuring device comprises a fixed support and an infrared distance measuring instrument connected with the fixed support, and the fixed support is connected to one side of the lead box body;
the top detection end of the infrared distance meter is flush with the top detection end of the coal seam thickness detector;
the lifting device comprises a lifting device outer sleeve, a lifting device inner sleeve, a lifting oil cylinder and an oil cylinder controller for controlling the working of the lifting oil cylinder;
the lifting device outer sleeve is connected with the adjusting mechanism, the lifting device inner sleeve is connected with the lifting device outer sleeve in a sliding mode, the lifting oil cylinder is installed in the lifting device outer sleeve, a piston rod of the lifting oil cylinder is connected with the lifting device inner sleeve, and the lifting device inner sleeve is connected with the nylon box body;
the oil cylinder controller, the infrared distance meter and the coal seam thickness detector are respectively connected with the signal processor.
2. The coal seam thickness detecting device according to claim 1, wherein the outer lifting device sleeve is hinged with the adjusting mechanism, and a swing oil cylinder for driving the outer lifting device sleeve to swing is further hinged between the adjusting mechanism and the outer lifting device sleeve.
3. The coal seam thickness detection apparatus of claim 1, wherein the adjustment mechanism includes a base unit and a telescoping unit connected to the base unit, the riser outer sleeve being connected to the telescoping unit.
4. The coal seam thickness detecting apparatus according to claim 3, wherein the telescoping device comprises a telescoping device outer sleeve, a telescoping device inner sleeve and a telescoping cylinder;
the telescopic device outer sleeve is connected with the base device, the telescopic device inner sleeve is connected with the telescopic device outer sleeve in a sliding mode, the telescopic oil cylinder is installed in the telescopic device outer sleeve, a piston rod of the telescopic oil cylinder is connected with the telescopic device inner sleeve, and the lifting device outer sleeve is connected with the telescopic device inner sleeve.
5. The coal seam thickness detecting apparatus according to claim 3, wherein the outer telescoping device sleeve is hinged to the base unit, and a support cylinder for supporting the outer telescoping device sleeve is further connected between the base unit and the outer telescoping device sleeve.
6. Coal seam thickness detection apparatus as claimed in any of claims 3 to 5 wherein the base means comprises a chassis and a turntable pivotally mounted on the chassis, the telescopic means being connected to the turntable.
7. The coal seam thickness detection device according to claim 6, wherein a chassis fixing plate is mounted on the chassis, and a plurality of turntable fixing plates are mounted on the turntable at intervals along the circumferential direction;
one of the turntable fixing discs is connected with the chassis fixing plate through a bolt.
8. The coal seam thickness detection apparatus according to claim 1, wherein the telescopic device is provided with a U-shaped guard plate for a liquid supply pipe to pass through.
9. The coal seam thickness detection device of claim 1, wherein a rubber gasket is disposed on a bottom surface of the nylon top cover.
10. A method of controlling coal seam thickness detection apparatus as claimed in any one of claims 1 to 9, comprising the steps of:
s01: the signal processor is preset with a preset distance H between the coal seam thickness detector and the bottom surface of the rest coal seam0；
S02: monitoring real-time distance H between coal seam thickness detector and bottom surface of residual coal seam by infrared distance meter1And will measure the real-time distance H1Transmitting to a signal processor, comparing and judging the real-time distance H1At a predetermined distance H0；
Such as H1＜H0The signal processor sends a descending signal to the oil cylinder controller, the piston rod of the lifting oil cylinder descends to drive the coal seam thickness detection device to descend by the distance H0-H1；
Such as H1＞H0The signal processor sends a rising signal to the oil cylinder controller, a piston rod of the lifting oil cylinder rises, and the coal seam thickness detection device is driven to rise by a distance H1-H0。
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