CN109469501B - Underground coal mine large-channel end suspension hydraulic support - Google Patents
Underground coal mine large-channel end suspension hydraulic support Download PDFInfo
- Publication number
- CN109469501B CN109469501B CN201811444454.2A CN201811444454A CN109469501B CN 109469501 B CN109469501 B CN 109469501B CN 201811444454 A CN201811444454 A CN 201811444454A CN 109469501 B CN109469501 B CN 109469501B
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- cantilever
- hydraulic cylinder
- sliding block
- brake
- sliding
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- 239000003245 coal Substances 0.000 title claims abstract description 54
- 239000000725 suspension Substances 0.000 title claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 25
- 229910002804 graphite Inorganic materials 0.000 claims description 15
- 239000010439 graphite Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 description 9
- 238000005299 abrasion Methods 0.000 description 6
- 239000002817 coal dust Substances 0.000 description 5
- 239000010883 coal ash Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
-
- 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
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
-
- 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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Chutes (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention belongs to the technical field of underground coal mine suspension equipment, and particularly relates to a large-channel end suspension hydraulic support in an underground coal mine; the hydraulic device comprises a first hydraulic cylinder, a second hydraulic cylinder, connecting blocks, a cantilever, a sliding block, a brake motor, a brake rope, a winch and a lifting rope, wherein two connecting blocks are arranged and are respectively and fixedly connected with the upper ends of a telescopic rod of the first hydraulic cylinder and a telescopic rod of the second hydraulic cylinder; one end of the cantilever is rotationally connected with a connecting block at the upper end of the first hydraulic cylinder, the other end of the cantilever is rotationally connected with a connecting block at the upper end of the second hydraulic cylinder, and a chute is arranged on the cantilever; the sliding block is clamped on the cantilever through the sliding groove and is in sliding connection with the cantilever; the motor shafts of the two brake motors are connected to the two sides of the sliding block through brake ropes; the winch is positioned in the sliding block, and one end of the lifting rope is tied on the motor shaft of the winch; the invention can reduce the transportation force of coal mines in short distance, greatly reduce the labor intensity of workers and improve the working efficiency and the safety performance.
Description
Technical Field
The invention belongs to the technical field of underground coal mine suspension equipment, and particularly relates to a large-channel end suspension hydraulic support in an underground coal mine.
Background
The junction of the underground coal face of the coal mine and the stoping roadway is called an end head, and the support for the end head is called an end head support. The end part is the junction of the scraper conveyor and the transfer conveyor, and is the throat part of the pedestrian passageway, ventilation, material conveying and coal conveying. The quality of the end support is the key point for determining whether the working face can normally run, and according to statistics of related safety departments, the personal casualties occurring at the end part account for more than half of underground accidents. If the end support mode formed by single hydraulic support and top beam is adopted for supporting on the common mining working face, the safety performance of the support is poor, the labor intensity of workers is high, and the working efficiency of the support is low. In recent years, the novel supporting equipment integral top beam combined suspension hydraulic support comprises: the method for supporting the end head of the coal mine is popularized and used, but two groups of integral top beam combined suspension hydraulic supports are connected in parallel for use, and because the center distance of two hydraulic supports on each support in the width direction is smaller, a reversed loader cannot be installed, and inconvenience is brought to use.
Therefore, there is an urgent need for a device "large channel head suspension hydraulic mount" that is wide in channel, safe, efficient, and reduces the labor intensity of workers.
Patent document 1: colliery is large channel end in pit hangs and moves hydraulic support, application number: 2013201285019
Patent document 1 discloses a large tunnel end suspension hydraulic support for a coal mine, and relates to mining equipment. The end parts of the left top beam and the right top beam are respectively supported by one hydraulic prop I, and the middle top beam is supported by five hydraulic props II. The lower part of the middle top beam is provided with a bracket, the bracket is connected with the middle top beam in a sliding way through a bracket floating guide assembly, and a gap is reserved between the bracket and the middle top beam and can float up and down. The left top beam and the right top beam are connected with the end parts of the bracket beams through bracket floating assemblies, and a gap is reserved between the left top beam and the right top beam and can float up and down. The support and the movement of the support in the patent literature are mechanized operation, so that the labor intensity of workers can be reduced, however, a large amount of coal powder is often attached to the support, when the amount of the attached dust on the support reaches a sufficient amount, the support becomes a potential danger, the coal powder blows out, and overflows, if the coal powder meets open fire, gas explosion is easily generated in a coal mine underground, and meanwhile, the support is severely worn in the use process and has a limited service life.
Disclosure of Invention
In order to make up the deficiency of the prior art, the invention provides the underground large-channel end suspension hydraulic support for the coal mine, which can reduce the short-distance coal mine transportation in the coal mine, greatly reduce the labor intensity of workers, improve the working efficiency and the safety performance, realize self-cleaning, reduce the adhesion of coal dust and reduce the occurrence of unsafe accidents.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a colliery is big passageway end suspension hydraulic support in pit, includes hydraulic cylinder No. one, hydraulic cylinder No. two, connecting block, cantilever, slider, brake motor, brake rope, hoist engine, lifting rope, the connecting block is provided with two, two connecting blocks respectively with the telescopic link of hydraulic cylinder No. one and the telescopic link upper end fastening connection of hydraulic cylinder No. two; one end of the cantilever is rotationally connected with a connecting block at the upper end of the first hydraulic cylinder, the other end of the cantilever is rotationally connected with a connecting block at the upper end of the second hydraulic cylinder, and a chute is arranged on the cantilever; the sliding block is clamped on the cantilever through a sliding groove and is in sliding connection with the cantilever; the two brake motors are arranged, one brake motor is fixed at the upper end of the connecting block of the first hydraulic cylinder, the other brake motor is fixed at the upper end of the connecting block of the second hydraulic cylinder, brake ropes are wound on motor shafts of the two brake motors, and the free ends of the brake ropes are connected to the sliding blocks; the hoisting machine is positioned in the sliding block, a hoisting rope is wound on a motor shaft of the hoisting machine, and a hook is fixed at the free end of the hoisting rope. During operation, the coal basket is hung on the hanging hook on the hanging rope, the coal basket is hung through the winch, when the coal basket is to be moved, one of the first hydraulic cylinder and the second hydraulic cylinder is lifted, the other hydraulic cylinder is located at the lower position, the cantilever is inclined, the sliding block slides to the lower position from the higher position on the cantilever under the action of gravity of the coal basket, the coal basket moves to the target position, the length of the braking rope is controlled through the braking motor, the sliding block is pulled by the braking motor, and the sliding block can be stopped at the specific position, so that the coal basket can be positioned and transported in a short distance.
The sliding block is I-shaped, and a bulge is arranged at the edge of the middle part of the sliding block; a plurality of elastic air bags are continuously arranged at the edge of the lower end of the cantilever; a plurality of first air holes are arranged on the elastic air bag, the sliding block moves to enable the protrusions to move along with the first air holes, and the elastic air bag and the moving protrusions can be extruded. When the device works, the sliding block slides on the cantilever, the bulge on the sliding block intermittently extrudes the elastic air bag, so that the elastic air bag continuously blows air to the sliding block, the deposition of coal ash on the sliding block is avoided, and the elastic air bag is provided with a one-way air inlet valve and a one-way air outlet valve.
The shape of the bulge is hemispherical. The bulge and the elastic air bag are mutually extruded, and the bulge is hemispherical, so that sliding friction force between the bulge and the elastic air bag is reduced, and abrasion is reduced.
And a graphite strip is arranged in a chute on the cantilever and is positioned at the upper end of the sliding block. The sliding block and the cantilever slide relatively for a long time, so that the cantilever and the sliding block are worn, the graphite strip is arranged at the upper end of the sliding block, graphite powder is generated in the sliding process of the sliding block and the cantilever, and has the function of lubricating the sliding block and the cantilever, so that the wear between the sliding block and the cantilever is reduced, and the cantilever hydraulic support can keep normal work for a long time.
The lower bottom surface of graphite strip is provided with a plurality of pits. The graphite powder generated by abrasion of the graphite strips in the sliding process is concentrated in the pits, so that the graphite powder can be favorably and uniformly scattered at the abrasion position between the sliding block and the cantilever.
The elastic air bag is communicated with an air pipe; the other end of the air pipe is fixed at the upper end of the cantilever, and the pipe orifice of the air pipe is along the surface of the cantilever. When the device works, the elastic air bag is extruded, part of air in the elastic air bag is blown to the surface of the upper end of the cantilever through the air pipe, so that the accumulated soot at the upper end of the cantilever is removed, the upper end of the cantilever is kept clean, and the potential safety hazard caused by accumulation of a large amount of soot on the cantilever is avoided.
The beneficial effects of the invention are as follows:
1. the invention can reduce the coal mine transportation strength in a short distance in a coal mine, greatly reduce the labor intensity of workers, improve the working efficiency and the safety performance, simultaneously realize self-cleaning, reduce the adhesion of coal dust and reduce the occurrence of unsafe accidents.
2. According to the invention, one of the first hydraulic cylinder and the second hydraulic cylinder is lifted, the other hydraulic cylinder is positioned at a low position, the cantilever is inclined, the sliding block slides from a high position to a low position on the cantilever under the action of gravity of the coal basket, the coal basket moves to a target position, the length of the brake rope is controlled through the brake motor, the sliding block is pulled by the brake motor, and the sliding block can be stopped at a specific position, so that the coal basket can be positioned and transported for a short distance.
3. According to the invention, the sliding block slides on the cantilever, and the bulge on the sliding block intermittently extrudes the elastic air bag, so that the elastic air bag continuously blows air to the sliding block, and the deposition of coal ash on the sliding block is avoided.
Drawings
FIG. 1 is a schematic diagram of a coal mine underground large channel end head suspension hydraulic support structure;
FIG. 2 is a cross-sectional view taken about A-A of FIG. 1;
FIG. 3 is a schematic view of the structure of a graphite strip of the present invention;
in the figure: a first hydraulic cylinder 1, a second hydraulic cylinder 2, a connecting block, a cantilever 4, an elastic air bag 41, a sliding block 5, a bulge 51, a brake motor 6, a brake rope 61, a winch 7, a lifting rope 71, a graphite strip 8 and an air pipe 9.
Detailed Description
The following description will be made of a large tunnel end suspension hydraulic support under a coal mine according to the present invention by using fig. 1 to 3.
As shown in fig. 1 to 3, the large-channel end suspension hydraulic support for the underground coal mine comprises a first hydraulic cylinder 1, a second hydraulic cylinder 2, a connecting block, a cantilever 4, a sliding block 5, a brake motor 6, a brake rope 61, a winch 7 and a lifting rope 71, wherein two connecting blocks are arranged and are respectively and fixedly connected with the upper ends of a telescopic rod of the first hydraulic cylinder 1 and a telescopic rod of the second hydraulic cylinder 2; one end of the cantilever 4 is rotationally connected with a connecting block at the upper end of the first hydraulic cylinder 1, the other end of the cantilever 4 is rotationally connected with a connecting block at the upper end of the second hydraulic cylinder 2, and a chute is arranged on the cantilever 4; the sliding block 5 is clamped on the cantilever 4 through a sliding groove and is in sliding connection with the cantilever 4; the two brake motors 6 are arranged, one brake motor 6 is fixed at the upper end of a connecting block of the first hydraulic cylinder 1, the other brake motor 6 is fixed at the upper end of a connecting block of the second hydraulic cylinder 2, brake ropes 61 are wound on motor shafts of the two brake motors 6, and free ends of the brake ropes 61 are connected to the sliding blocks 5; the winch 7 is positioned in the sliding block 5, a lifting rope 71 is wound on a motor shaft of the winch 7, and a hook is fixed at the free end of the lifting rope 71. When the coal basket is in operation, the coal basket is hung on the hanging hook on the hanging rope 71, the coal basket is hung through the winch 7, when the coal basket is to be moved, one of the first hydraulic cylinder 1 or the second hydraulic cylinder 2 is lifted, the other hydraulic cylinder is positioned at a low position, the cantilever 4 is inclined, the sliding block 5 slides to a low position from a high position on the cantilever 4 under the action of gravity of the coal basket, the coal basket is moved to a target position, the length of the braking rope 61 is controlled through the braking motor 6, the sliding block 5 is pulled by the braking motor 6, and the sliding block 5 can be stopped at a specific position, so that the coal basket can be positioned and transported in a short distance.
The sliding block 5 is I-shaped, and a bulge 51 is arranged at the edge of the middle part of the sliding block 5; a plurality of elastic air bags 41 are continuously arranged at the edge of the lower end of the cantilever 4; the elastic air bag 41 is provided with a plurality of first air holes, the sliding block 5 moves to enable the protrusion 51 to follow the movement, and the elastic air bag 41 and the moving protrusion 51 can be extruded. When the device works, the sliding block 5 slides on the cantilever 4, the bulge 51 on the sliding block 5 intermittently extrudes the elastic air bag 41, so that the elastic air bag 41 continuously blows air to the sliding block 5, coal ash is prevented from being deposited on the sliding block 5, and the elastic air bag 41 is provided with a one-way air inlet valve and a one-way air outlet valve.
The shape of the protrusion 51 is hemispherical. The protrusion 51 and the elastic air bag 41 are mutually pressed, and the protrusion 51 is hemispherical, so that the sliding friction force between the protrusion 51 and the elastic air bag 41 is reduced, and the abrasion is reduced.
And a graphite strip 8 is arranged in a chute on the cantilever 4, and the graphite strip 8 is positioned at the upper end of the sliding block 5. The sliding block 5 and the cantilever 4 slide relatively for a long time, so that the cantilever 4 and the sliding block 5 are worn, the graphite strips 8 are arranged at the upper end of the sliding block 5, graphite powder is generated in the sliding process of the sliding block 5 and the cantilever 4, and has the function of lubricating the sliding block 5 and the cantilever 4, and therefore the wear between the sliding block 5 and the cantilever 4 is reduced, and the cantilever hydraulic support is favorable for keeping normal work for a long time.
The lower bottom surface of the graphite strip 8 is provided with a plurality of pits. The plurality of pits are formed in the lower bottom surface of the graphite strip 8, so that graphite powder generated by abrasion of the graphite strip 8 in the sliding process is concentrated in the pits, and the graphite powder is facilitated to be uniformly sprayed at the abrasion position between the sliding block 5 and the cantilever 4.
The elastic air bag 41 is communicated with an air pipe 9; the other end of the air pipe 9 is fixed at the upper end of the cantilever 4, and the pipe orifice of the air pipe 9 is along the surface of the cantilever 4. When the device works, the elastic air bag 41 is extruded, part of air in the elastic air bag 41 is blown to the upper end surface of the cantilever 4 through the air pipe 9, so that the accumulated soot at the upper end of the cantilever 4 is cleaned, the upper end of the cantilever 4 is kept clean, and a great amount of soot accumulated on the cantilever 4 is prevented from leaving potential safety hazards.
The specific working procedure is as follows:
when the coal basket is in operation, the coal basket is hung on the hanging rope 71, the winch 7 is used for hanging the coal basket, when the coal basket is to be moved, one of the first hydraulic cylinder 1 or the second hydraulic cylinder 2 is lifted, the other hydraulic cylinder is positioned at a low position, the cantilever 4 is inclined, the sliding block 5 slides to a low position from a high position on the cantilever 4 under the action of gravity of the coal basket, the coal basket is moved to a target position, the length of the braking rope 61 is controlled through the braking motor 6, the sliding block 5 is pulled by the braking motor 6, and the sliding block 5 can be stopped at a specific position, so that coal is transported for a short distance by the coal basket; in the sliding process of the sliding block 5 on the cantilever 4, the bulge 51 on the sliding block 5 is used for intermittently extruding the elastic air bag 41, so that the elastic air bag 41 is continuously blown to the sliding block 5, coal ash is prevented from being deposited on the sliding block 5, and activated carbon particles are placed in the elastic air bag 41, so that the air in a coal mine is continuously sucked and blown out in the air exchange process of the elastic air bag 41, coal dust is contained in the air in the coal mine, and the activated carbon particles can adsorb the coal dust, so that the content of the coal dust in the air in the coal mine is reduced, the personnel safety in the coal mine is facilitated, and the probability of gas explosion is reduced.
The first hydraulic cylinder and the second hydraulic cylinder are one of Adand SC cylinders or SMC MBB cylinders; the braking motor is a three-phase asynchronous motor; the winch is a JT700 type explosion-proof lifting winch or a hydraulic winch.
Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.
Claims (3)
1. The utility model provides a colliery is large passageway end in pit hangs and moves hydraulic support which characterized in that: the hydraulic device comprises a first hydraulic cylinder (1), a second hydraulic cylinder (2), connecting blocks, a cantilever (4), a sliding block (5), a brake motor (6), a brake rope (61), a winch (7) and a lifting rope (71), wherein two connecting blocks are arranged and are respectively and fixedly connected with the telescopic rod of the first hydraulic cylinder (1) and the upper end of the telescopic rod of the second hydraulic cylinder (2); one end of the cantilever (4) is rotationally connected with a connecting block at the upper end of the first hydraulic cylinder (1), the other end of the cantilever (4) is rotationally connected with a connecting block at the upper end of the second hydraulic cylinder (2), and a chute is arranged on the cantilever (4); the sliding block (5) is clamped on the cantilever (4) through a sliding groove and is in sliding connection with the cantilever (4); the two brake motors (6) are arranged, one brake motor (6) is fixed at the upper end of a connecting block of the first hydraulic cylinder (1), the other brake motor (6) is fixed at the upper end of a connecting block of the second hydraulic cylinder (2), brake ropes (61) are wound on motor shafts of the two brake motors (6), and the free ends of the brake ropes (61) are connected to the sliding blocks (5); the winch (7) is positioned in the sliding block (5), and one end of the lifting rope (71) is tethered on the motor shaft of the winch (7);
the sliding block (5) is I-shaped, and a bulge (51) is arranged at the edge of the middle part of the sliding block (5); a plurality of elastic air bags (41) are continuously arranged at the edge of the lower end of the cantilever (4); the elastic air bag (41) is provided with a plurality of first air holes, the sliding block (5) moves to enable the bulge (51) to move along, and the elastic air bag (41) and the moved bulge (51) can be extruded;
the shape of the bulge (51) is hemispherical;
and a graphite strip (8) is arranged in a chute on the cantilever (4), and the graphite strip (8) is positioned at the upper end of the sliding block (5).
2. The coal mine underground large channel end suspension hydraulic support according to claim 1, wherein: the lower bottom surface of graphite strip (8) is provided with a plurality of pits.
3. The coal mine underground large channel end suspension hydraulic support according to claim 1, wherein: the elastic air bag (41) is communicated with an air pipe (9); the other end of the air pipe (9) is fixed at the upper end of the cantilever (4), and the pipe orifice of the air pipe (9) is along the surface of the cantilever (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444454.2A CN109469501B (en) | 2018-11-29 | 2018-11-29 | Underground coal mine large-channel end suspension hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444454.2A CN109469501B (en) | 2018-11-29 | 2018-11-29 | Underground coal mine large-channel end suspension hydraulic support |
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| Publication Number | Publication Date |
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| CN109469501A CN109469501A (en) | 2019-03-15 |
| CN109469501B true CN109469501B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811444454.2A Active CN109469501B (en) | 2018-11-29 | 2018-11-29 | Underground coal mine large-channel end suspension hydraulic support |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294037A (en) * | 2021-12-27 | 2022-04-08 | 石校舆 | Mining thin coal hydraulic support |
| CN114876548A (en) * | 2022-06-14 | 2022-08-09 | 吴驰壤 | End suspension hydraulic support for underground large channel of coal mine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1270115A (en) * | 1969-03-05 | 1972-04-12 | Bonser Engineering Ltd | Improvements in or relating to mine roof support devices |
| CN201144709Y (en) * | 2007-08-22 | 2008-11-05 | 陕西蒲白三通有限公司 | Suspension-shift hydraulic support with overturning beam |
| CN103195458A (en) * | 2013-03-20 | 2013-07-10 | 徐州天能矿山机械有限责任公司 | Underground coal mine large channel end socket suspension hydraulic support |
| CN203847142U (en) * | 2014-05-23 | 2014-09-24 | 徐州天能矿山机械有限责任公司 | Suspension type hydraulic support for coal mine roadway end |
| CN209293829U (en) * | 2018-11-29 | 2019-08-23 | 安徽省皖北煤电集团有限责任公司 | A kind of underground coal mine large channel end socket suspension hydraulic support |
-
2018
- 2018-11-29 CN CN201811444454.2A patent/CN109469501B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1270115A (en) * | 1969-03-05 | 1972-04-12 | Bonser Engineering Ltd | Improvements in or relating to mine roof support devices |
| CN201144709Y (en) * | 2007-08-22 | 2008-11-05 | 陕西蒲白三通有限公司 | Suspension-shift hydraulic support with overturning beam |
| CN103195458A (en) * | 2013-03-20 | 2013-07-10 | 徐州天能矿山机械有限责任公司 | Underground coal mine large channel end socket suspension hydraulic support |
| CN203847142U (en) * | 2014-05-23 | 2014-09-24 | 徐州天能矿山机械有限责任公司 | Suspension type hydraulic support for coal mine roadway end |
| CN209293829U (en) * | 2018-11-29 | 2019-08-23 | 安徽省皖北煤电集团有限责任公司 | A kind of underground coal mine large channel end socket suspension hydraulic support |
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| CN109469501A (en) | 2019-03-15 |
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Effective date of registration: 20240701 Address after: 475000 middle section of Weidu Road, Kaifeng City, Henan Province Patentee after: Henan Energy Group Heavy Equipment Co.,Ltd. Country or region after: China Address before: 234000 No. 157, Xichang Road, Suzhou, Anhui Patentee before: WANBEI COAL-ELECTRICITY GROUP Co.,Ltd. Country or region before: China |