CN112902797A - Coal mine sump sludge thickness measuring device - Google Patents
Coal mine sump sludge thickness measuring device Download PDFInfo
- Publication number
- CN112902797A CN112902797A CN202110061152.2A CN202110061152A CN112902797A CN 112902797 A CN112902797 A CN 112902797A CN 202110061152 A CN202110061152 A CN 202110061152A CN 112902797 A CN112902797 A CN 112902797A
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- China
- Prior art keywords
- coal mine
- fixedly connected
- wall
- sump
- sump body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003245 coal Substances 0.000 title claims abstract description 55
- 239000010802 sludge Substances 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000004804 winding Methods 0.000 claims description 25
- 238000005096 rolling process Methods 0.000 claims description 21
- 238000009434 installation Methods 0.000 claims description 18
- 244000309464 bull Species 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 230000006978 adaptation Effects 0.000 claims description 5
- 230000035939 shock Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
Abstract
The invention discloses a device for measuring the thickness of sludge in a coal mine water sump, which comprises a supporting bottom plate, a measuring belt and a water inlet pipe, wherein an adjusting sleeve is fixedly connected to the lower surface of the supporting bottom plate, internal threads are formed on the inner wall of the adjusting sleeve, a threaded adjusting rod is connected to the inner wall of the adjusting sleeve through the internal threads and threads, a coal mine water sump body and a U-shaped mounting frame are respectively and fixedly connected to the upper surface of the supporting bottom plate, four mounting blocks are fixedly connected to the inner wall of the coal mine water sump body, every two mounting blocks are in one group, and two groups of mounting blocks are symmetrically arranged on the inner front wall and the inner rear wall of the coal mine. This colliery sump silt thickness measurement device through measuring area, colliery sump body, connecting block and longitudinal movement board to set up the scale mark on the surface of measuring the area, the longitudinal movement board can be measured this internal silt of colliery sump, and can reach the purpose of carrying out the reading to the thickness of silt through the scale mark on measurement area surface.
Description
Technical Field
The invention relates to the technical field of coal mine water sump equipment, in particular to a coal mine water sump sludge thickness measuring device.
Background
Coal mines are areas where humans mine coal resources in coal-rich mining areas, and are generally divided into underground coal mines and open pit coal mines, and when a coal seam is far from the ground surface, coal mining is generally selected to dig a tunnel underground, which is the underground coal mine.
And the in-process that the colliery sump was used can have the silt that the aquatic mixes and the colliery itself to deposit the condition in the colliery sump, forms silt in the inside of colliery sump to cause the influence to the use of colliery sump, all adopt the manpower to measure the silt thickness in the colliery sump under the general condition, but adopt the mode of manpower measurement, efficiency is lower, and at the measuring in-process, the bodily injury accident can take place.
Therefore, a coal mine water sump sludge thickness measuring device is needed.
Disclosure of Invention
The invention aims to provide a coal mine sump sludge thickness measuring device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a coal mine water sump sludge thickness measuring device comprises a supporting base plate, a measuring belt and a water inlet pipe, wherein an adjusting sleeve is fixedly connected to the lower surface of the supporting base plate, an inner thread is formed in the inner wall of the adjusting sleeve, a thread adjusting rod is connected to the inner wall of the adjusting sleeve through an inner thread, a coal mine water sump body and a U-shaped mounting frame are fixedly connected to the upper surface of the supporting base plate respectively, mounting blocks are fixedly connected to the inner wall of the coal mine water sump body, the number of the mounting blocks is four, every two mounting blocks are in one group, two groups of the mounting blocks are symmetrically arranged on the inner front wall and the inner rear wall of the coal mine water sump body, vertical guide sliding rods are fixedly connected to opposite surfaces of the two groups of the mounting blocks, a longitudinal moving plate is connected to the surfaces of the two vertical guide sliding rods in a sliding manner, the side surface of the longitudinal moving plate is in a T, the upper surface of the longitudinal moving plate is fixedly connected with a connecting block, the upper surface of the connecting block is fixedly connected with one end of a measuring belt, and the surface of the measuring belt is provided with scale identification lines.
Preferably, the outlet pipe is embedded in the left side wall of colliery sump body, the top of colliery sump body is provided with rotates the seat, the axis of rotation fixed surface who rotates the seat is connected with the protective cover board, the bar groove with inlet tube and measuring area looks adaptation is seted up on the surface of protective cover board, the surface of outlet pipe and inlet tube all is provided with the valve.
Preferably, the top is two the opposite face fixedly connected with longitudinal fixation pole of installation piece, the slip through-hole with measuring the area looks adaptation is seted up on the surface of longitudinal fixation pole, the inner wall fixedly connected with installation bull stick of slip through-hole, the quantity of installation bull stick is two, two the surface of installation bull stick all rotates and is connected with the squeeze roll, two the surface of squeeze roll respectively with measure two side overlap joints in area.
Preferably, the number of the adjusting sleeves and the number of the thread adjusting rods are four, the adjusting sleeves are arranged at four corners of the lower surface of the supporting base plate in a rectangular array mode, the bottom ends of the thread adjusting rods are provided with rotating sleeves, the bottom ends of the thread adjusting rods are rotatably connected with damping anti-slip pads through the rotating sleeves, and the surface of each thread adjusting rod is fixedly connected with a limiting ring.
Preferably, the inner wall fixedly connected with rolling bearing of U type mounting bracket, rolling bearing's quantity is two, two the rolling bearing symmetry sets up at the interior antetheca and the interior back wall of U type mounting bracket, two rolling bearing's interior anchor circle fixedly connected with winding rod, winding rod's fixed surface is connected with the wind-up roll, the measuring tape is kept away from the one end of connecting block and the fixed surface of wind-up roll and is connected, the back fixedly connected with rolling motor of U type mounting bracket, rolling motor is just reverse motor, rolling motor's the output and the one end fixed connection at the winding rod back.
Preferably, the right side wall of colliery water sump body is the first rectangular block of fixedly connected with and second rectangular block respectively, the quantity of first rectangular block is two, two first rectangular block symmetry sets up the right side wall at colliery water sump body, two the opposite face of first rectangular block rotates and is connected with the direction and winds the roller, the surface of roller is wound in the direction to the measuring tape is laid.
Preferably, the inside of second rectangular block is seted up the spacing slide that link up from top to bottom, measure the inside of taking sliding connection at the spacing slide of second rectangular block, the observation window has been seted up to the right side wall of second rectangular block, the observation window is corresponding with the scale mark position of measuring the tape surface.
Preferably, the left side wall of the coal mine sump body is provided with a control panel, and the control panel is electrically connected with an external power supply.
Advantageous effects
The invention provides a coal mine sump sludge thickness measuring device, which has the following beneficial effects:
1. this colliery sump silt thickness measurement device is through setting up measurement area, colliery sump body, connecting block and longitudinal movement board to set up the scale mark on the surface of measurement area, the longitudinal movement board can be measured this internal silt of colliery sump, and can reach the purpose of carrying out the reading to the thickness of silt through the scale mark on measurement area surface.
2. This coal mine sump silt thickness measurement device, through setting up the adjusting sleeve, screw thread adjusting rod and supporting baseplate and shock attenuation slipmat, in the mine, can adjust the levelness of supporting baseplate through rotating the screw thread adjusting rod, through setting up the rolling motor, the wind-up roll, first rectangular block and direction are around the roller, can take rolling and spacing to measuring, and at the in-process of rolling, can be to measuring the relative extrusion of area through the squeeze roll, reach the purpose of discharging measurement area surface moisture, protect measuring the area, through setting up protective cover plate, can protect the inside of coal mine sump body, avoid the inside of outside foreign matter direct entering coal mine sump body, and can carry out the protection of certain degree to staff's personal safety.
Drawings
FIG. 1 is a schematic front sectional view of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is an enlarged view of the structure at B in FIG. 1;
FIG. 4 is a schematic diagram of a right view structure of the U-shaped mounting frame;
FIG. 5 is a schematic diagram of a right-side sectional structure of a coal mine sump body.
In the figure: the coal mine water sump comprises a supporting bottom plate 1, a measuring belt 2, a water inlet pipe 3, an adjusting sleeve 4, a thread adjusting rod 5, a coal mine water sump body 6, a 7U-shaped mounting rack, an installation block 8, a vertical guide sliding rod 9, a vertical moving plate 10, a connecting block 11, a scale mark line 12, a water outlet pipe 13, a protective cover plate 14, a vertical fixing rod 15, a squeezing roller 16, a damping non-slip mat 17, a limiting ring 18, a winding roller 19, a winding motor 20, a first rectangular block 21, a second rectangular block 22, a guide winding roller 23 and a control panel 24.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a coal mine sump sludge thickness measuring device comprises a supporting base plate 1, a measuring belt 2 and a water inlet pipe 3, wherein the lower surface of the supporting base plate 1 is fixedly connected with an adjusting sleeve 4, the inner wall of the adjusting sleeve 4 is provided with internal threads, the inner wall of the adjusting sleeve 4 is connected with a threaded adjusting rod 5 through the internal threads and threads, the number of the adjusting sleeve 4 and the threaded adjusting rod 5 is four, the four adjusting sleeves 4 are arranged at four corners of the lower surface of the supporting base plate 1 in a rectangular array manner, the bottom ends of the four threaded adjusting rods 5 are respectively provided with a rotating sleeve, the bottom ends of the threaded adjusting rods 5 are rotatably connected with a shock-absorbing anti-skid pad 17 through the rotating sleeves, the surface of, by arranging the adjusting sleeve 4, the threaded adjusting rod 5, the supporting base plate 1 and the shock-absorbing anti-skid pad 17, in the mine, the levelness of the supporting bottom plate 1 can be adjusted by rotating the threaded adjusting rod 5.
Inner wall fixedly connected with installation piece 8 of colliery sump body 6, the quantity of installation piece 8 is four, per two installation pieces 8 are a set of, two sets of 8 symmetries of installation piece set up at the interior antetheca and the interior back wall of colliery sump body 6, the equal fixedly connected with vertical direction slide bar 9 of opposite face of two sets of installation pieces 8, the sliding surface of two vertical direction slide bars 9 is connected with longitudinal movement board 10, the side of longitudinal movement board 10 is the T style of calligraphy, the lower surface of longitudinal movement board 10 and the interior diapire overlap joint of colliery sump body 6, the last fixed surface of longitudinal movement board 10 is connected with connecting block 11, the upper surface of connecting block 11 and the one end fixed connection of measuring band 2, scale mark line 12 has been seted up on the surface of measuring band 2.
The opposite face fixedly connected with longitudinal tie rod 15 of two installation pieces 8 in top, the slip through-hole with measuring 2 looks adaptations is seted up on the surface of longitudinal tie rod 15, the inner wall fixedly connected with installation bull stick of slip through-hole, the quantity of installation bull stick is two, the surface of two installation bull sticks all rotates and is connected with squeeze roll 16, the surface of two squeeze rolls 16 respectively with measure two side overlap joints of taking 2.
Inner wall fixedly connected with rolling bearing of U type mounting bracket 7, rolling bearing's quantity is two, two rolling bearing symmetries set up at the interior antetheca and the interior back wall of U type mounting bracket 7, two rolling bearing's interior annular fixedly connected with winding rod, winding rod's fixed surface is connected with wind-up roll 19, measuring tape 2 keeps away from the one end of connecting block 11 and wind-up roll 19's fixed surface and is connected, U type mounting bracket 7's back fixedly connected with coiling motor 20, coiling motor 20 is the motor that just reverses, the output of coiling motor 20 and the one end fixed connection at the winding rod back.
The right side wall of the coal mine water sump body 6 is fixedly connected with a first rectangular block 21 and a second rectangular block 22 respectively, the number of the first rectangular blocks 21 is two, the two first rectangular blocks 21 are symmetrically arranged on the right side wall of the coal mine water sump body 6, the opposite surfaces of the two first rectangular blocks 21 are rotatably connected with guide winding rollers 23, the measuring belt 2 is laid on the surface of the guide winding rollers 23, the measuring belt 2 can be wound and limited by arranging a winding motor 20, a winding roller 19, the first rectangular blocks 21 and the guide winding rollers 23, in the winding process, the measuring belt 2 can be relatively extruded by an extrusion roller 16, the purpose of discharging the surface moisture of the measuring belt 2 is achieved, the measuring belt 2 is protected, a limiting slide way which is vertically communicated is arranged inside the second rectangular block 22, the measuring belt 2 is slidably connected inside the limiting slide way of the second rectangular block 22, the right side wall of the second rectangular block 22 is provided with an observation window, the observation window corresponds with the scale mark line 12 position on the surface of the measuring belt 2, and through setting the measuring belt 2, the coal mine water sump body 6, the connecting block 11 and the longitudinal moving plate 10, and the scale mark line 12 is arranged on the surface of the measuring belt 2, the longitudinal moving plate 10 can measure the sludge in the coal mine water sump body 6, and the purpose of reading the thickness of the sludge can be achieved through measuring the scale mark line 12 on the surface of the measuring belt 2.
The left side wall of the coal mine sump body 6 is provided with a control panel 24, and the control panel 24 is electrically connected with an external power supply.
The working principle is as follows: when the device for measuring the thickness of the sludge in the coal mine sump is used, the levelness of the supporting base plate 1 can be adjusted by rotating the threaded adjusting rod 5 through the adjusting sleeve 4, the threaded adjusting rod 5, the supporting base plate 1 and the shock-absorbing anti-slip mat 17 in an uneven mine, the measuring belt 2 can be wound and limited through the winding motor 20, the winding roller 19, the first rectangular block 21 and the guiding winding roller 23, the measuring belt 2 can be relatively extruded through the extrusion roller 16 in the winding process, the purpose of discharging the surface moisture of the measuring belt 2 is achieved, when the thickness of the sludge needs to be measured, the winding motor 20 drives the winding roller 19 to rotate reversely, the measuring belt 2 is unwound, the longitudinal moving plate 10 falls towards the inner bottom wall of the coal mine sump body 6 along the vertical guiding sliding rod 9 from the initial suspension state under the action of gravity, and after contacting the sludge, the longitudinal moving plate 10 stops falling, the measuring belt 2 is changed from a tight state to a loose state in the unreeling process, the winding motor 20 stops rotating at the moment, the measuring belt 2 is tensioned below the second rectangular block 22 by hand, the scale mark lines 12 are read in the observation window on the surface of the second rectangular block 22, and the sludge thickness value can be obtained, so that the sludge thickness measuring purpose is achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a colliery sump silt thickness measurement device, includes supporting baseplate (1), measuring belt (2) and inlet tube (3), its characterized in that: the lower surface of the supporting base plate (1) is fixedly connected with an adjusting sleeve (4), the inner wall of the adjusting sleeve (4) is provided with an internal thread, the inner wall of the adjusting sleeve (4) is connected with a thread adjusting rod (5) through the internal thread, the upper surface of the supporting base plate (1) is respectively and fixedly connected with a coal mine water sump body (6) and a U-shaped mounting rack (7), the inner wall of the coal mine water sump body (6) is fixedly connected with mounting blocks (8), the number of the mounting blocks (8) is four, every two mounting blocks (8) are a group, two groups of the mounting blocks (8) are symmetrically arranged on the inner front wall and the inner rear wall of the coal mine water sump body (6), the opposite surfaces of the two groups of the mounting blocks (8) are fixedly connected with vertical guide sliding rods (9), and the surfaces of the two vertical guide sliding rods (9) are slidably connected with a longitudinal, the side surface of the longitudinal moving plate (10) is T-shaped, the lower surface of the longitudinal moving plate (10) is lapped with the inner bottom wall of the coal mine water sump body (6), the upper surface of the longitudinal moving plate (10) is fixedly connected with a connecting block (11), the upper surface of the connecting block (11) is fixedly connected with one end of the measuring belt (2), the surface of the measuring belt (2) is provided with scale marking lines (12), the left side wall of the coal mine water sump body (6) is embedded with a water outlet pipe (13), the top of the coal mine water sump body (6) is provided with a rotating seat, the surface of a rotating shaft of the rotating seat is fixedly connected with a protective cover plate (14), the surface of the protective cover plate (14) is provided with a strip-shaped groove matched with the water inlet pipe (3) and the measuring belt (2), and valves are arranged on the surfaces of the water outlet pipe (13) and the water inlet pipe (3).
2. The coal mine sump sludge thickness measuring device of claim 1, wherein: the top is two opposite face fixedly connected with longitudinal tie rod (15) of installation piece (8), the slip through-hole with measurement area (2) looks adaptation is seted up on the surface of longitudinal tie rod (15), the inner wall fixedly connected with installation bull stick of slip through-hole, the quantity of installation bull stick is two, two the surface of installation bull stick all rotates and is connected with squeeze roll (16), two the surface of squeeze roll (16) respectively with measure two side overlap joints of taking (2).
3. The coal mine sump sludge thickness measuring device of claim 1, wherein: the quantity of adjusting sleeve (4) and screw thread adjusting lever (5) is four, four adjusting sleeve (4) are the four corners department that the rectangle array set up at supporting baseplate (1) lower surface, four the bottom of screw thread adjusting lever (5) all is provided with rotates the cover, the bottom of screw thread adjusting lever (5) is rotated through rotating the cover and is connected with shock attenuation slipmat (17), the fixed surface of screw thread adjusting lever (5) is connected with spacing collar (18).
4. The coal mine sump sludge thickness measuring device of claim 1, wherein: the inner wall fixedly connected with rolling bearing of U type mounting bracket (7), rolling bearing's quantity is two, two the rolling bearing symmetry sets up at the interior antetheca and the interior back wall of U type mounting bracket (7), two rolling bearing's interior annular fixedly connected with winding rod, winding rod's fixed surface is connected with wind-up roll (19), the one end that connecting block (11) were kept away from in measurement area (2) is connected with the fixed surface of wind-up roll (19), the back fixedly connected with rolling motor (20) of U type mounting bracket (7), rolling motor (20) are just reversing motor, the output of rolling motor (20) and the one end fixed connection at the winding rod back.
5. The coal mine sump sludge thickness measuring device of claim 1, wherein: the right side wall of colliery sump body (6) is first rectangular block of fixedly connected with (21) and second rectangular block (22) respectively, the quantity of first rectangular block (21) is two, two first rectangular block (21) symmetry sets up the right side wall at colliery sump body (6), two the opposite face of first rectangular block (21) is rotated and is connected with the direction and winds roller (23), survey area (2) and lay the surface around roller (23) in the direction.
6. The coal mine sump sludge thickness measuring device according to claim 1 or 5, wherein: the inside of second rectangle piece (22) is seted up the spacing slide that link up from top to bottom, measure the inside of taking (2) sliding connection at the spacing slide of second rectangle piece (22), the observation window has been seted up to the right side wall of second rectangle piece (22), the observation window is corresponding with scale mark line (12) position of measuring area (2) surface.
7. The coal mine sump sludge thickness measuring device of claim 1, wherein: the left side wall of colliery sump body (6) is provided with control panel (24), control panel (24) and external power source electric connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061152.2A CN112902797B (en) | 2021-01-18 | 2021-01-18 | Coal mine sump sludge thickness measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061152.2A CN112902797B (en) | 2021-01-18 | 2021-01-18 | Coal mine sump sludge thickness measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112902797A true CN112902797A (en) | 2021-06-04 |
| CN112902797B CN112902797B (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110061152.2A Expired - Fee Related CN112902797B (en) | 2021-01-18 | 2021-01-18 | Coal mine sump sludge thickness measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112902797B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206787448U (en) * | 2017-06-06 | 2017-12-22 | 牛柏森 | Coal-mine water-house surveying on sludge thickness device |
| CN208443307U (en) * | 2018-05-25 | 2019-01-29 | 张超超 | A kind of coal-mine water-house surveying on sludge thickness device |
| CN111156909A (en) * | 2019-12-24 | 2020-05-15 | 山东东山新驿煤矿有限公司 | Coal mine sump sludge thickness measuring device |
| CN211346638U (en) * | 2020-03-31 | 2020-08-25 | 河南工程咨询监理有限公司 | Measuring system for thickness of sludge in mine sump |
| CN111981943A (en) * | 2020-07-26 | 2020-11-24 | 葛庆运 | Coal mine sump sludge thickness measuring device |
-
2021
- 2021-01-18 CN CN202110061152.2A patent/CN112902797B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206787448U (en) * | 2017-06-06 | 2017-12-22 | 牛柏森 | Coal-mine water-house surveying on sludge thickness device |
| CN208443307U (en) * | 2018-05-25 | 2019-01-29 | 张超超 | A kind of coal-mine water-house surveying on sludge thickness device |
| CN111156909A (en) * | 2019-12-24 | 2020-05-15 | 山东东山新驿煤矿有限公司 | Coal mine sump sludge thickness measuring device |
| CN211346638U (en) * | 2020-03-31 | 2020-08-25 | 河南工程咨询监理有限公司 | Measuring system for thickness of sludge in mine sump |
| CN111981943A (en) * | 2020-07-26 | 2020-11-24 | 葛庆运 | Coal mine sump sludge thickness measuring device |
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| CN112902797B (en) | 2022-08-05 |
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