CN107355243A - A kind of suspended type hydraulic vertical prop - Google Patents
A kind of suspended type hydraulic vertical prop Download PDFInfo
- Publication number
- CN107355243A CN107355243A CN201610302897.2A CN201610302897A CN107355243A CN 107355243 A CN107355243 A CN 107355243A CN 201610302897 A CN201610302897 A CN 201610302897A CN 107355243 A CN107355243 A CN 107355243A
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- China
- Prior art keywords
- live post
- cylinder
- column
- vertical prop
- cylinder 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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- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000000428 dust Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 10
- 239000003245 coal Substances 0.000 abstract description 8
- 230000035939 shock Effects 0.000 abstract description 4
- 238000004945 emulsification Methods 0.000 abstract description 3
- 239000000839 emulsion Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 208000032820 Ring chromosome 13 syndrome Diseases 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 208000035397 Ring chromosome 7 syndrome Diseases 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 208000032826 Ring chromosome 3 syndrome Diseases 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 208000035480 Ring chromosome 8 syndrome Diseases 0.000 description 1
- 208000032827 Ring chromosome 9 syndrome Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The present invention relates to a kind of suspended type hydraulic vertical prop, and plugging device or bushing are provided with the bottom of live post body；The exhaust passage of live post intracoelomic cavity and extraneous air is communicated with column cap.The hydraulic vertical prop is applied on the hydraulic support of underground coal mine fully-mechanized mining working；When live post intracoelomic cavity and each independent variable column sealed cavity, hydraulic vertical prop is small to the dosage of emulsion；When live post intracoelomic cavity connects with variable column sealed cavity, variable column sealed cavity capacity increase, the length of column internal emulsification liquid column at least adds one times, the ability pressed with substantially increasing column shock resistance, especially suitable for pressure bump behavior frequently on fully-mechanized mining working surface hydraulic support；The increase of bushing, improve the intensity of live post body movable end, the reliability of enhancing hydraulic vertical prop activity；Exhaust passage is provided with hydraulic vertical prop column cap, the gas in column can be effectively drained, improve the support performance of column.
Description
Technical field
The present invention relates to a kind of suspended type hydraulic vertical prop, suitable on the hydraulic support of underground coal mine fully-mechanized mining working.
Background technology
Hydraulic support is one of essential equipment of underground coal mine fully-mechanized mining working, and the use of hydraulic support brings great benefit to coal face safety coal extraction and high winning technology.The hydraulic support used in China's coal-mine can be divided into standing support, shield, chock shield, caving roof coal hydraulic support, light hydraulic support, Special hydraulic etc. by its support pattern to top plate and design feature difference, and hydraulic vertical prop be hydraulic support can safe and effective supported face top plate critical component.The hydraulic vertical prop that hydraulic support uses at present is double telescopic hydraulic columns and single telescopic hydraulic column with mechanical extension bar, and specific constructive form is shown in what Coal Industry Press published in 1999《Hydraulic support technology》Chapter 7, first segment content.Double telescopic hydraulic pillar constructions are complicated, following problem be present：1 middle cylinder bears higher fluid pressure, in roof weighting caused by middle cylinder bulging dead post, as colliery is toward deep mining, the increase of pressure bump behavior frequency, the phenomenon of dead post can increase caused by middle cylinder bulging；Requirement of 2 middle cylinders to material is high, and processing technology is complicated, and production cost is high；3 offset load resistances are small, less stable.Single telescopic hydraulic column with mechanical extension bar is because using manual adjustment impulse stroke, it is difficult to adapts to the fully-mechanized mining working of modernization.Thus the hydraulic vertical prop of development of new has important practical significance.
The content of the invention
Technical problem：The purpose of the present invention is overcome the shortcomings of in prior art, there is provided it is a kind of it is simple in construction, stability is good, shock resistance pressure energy power is strong, cost is low, the single extension suspended type hydraulic vertical prop of long lifespan.
Technical scheme：A kind of suspended type hydraulic vertical prop, including cylinder bottom, guide ring, seal assembly, cylinder body, hoisting ring, retainer ring, cylinder hoop, in lead to set, dust ring, column cap, be hinged axis hole, stud, joint, live post body, fluid-through tube, interface；Described column cap is welded as a whole with live post body upper end, and be hinged axis hole is provided with the top of column cap；Described cylinder bottom is welded as a whole with cylinder body, and the outside of cylinder body is welded with the retainer ring with hoisting ring；Lead to set during portion disposed thereon is provided between the cylinder body and live post body, in lead between set and live post body and be provided with dust ring, seal assembly and guide ring, in lead between set and cylinder body and be provided with seal assembly, and in the logical top that covers it is circumferentially fixed with cylinder body by stud；Seal assembly and guide ring are set between the outer wall of live post body lower end and the inwall of cylinder body；The position for leading to set in being corresponded to outside the cylinder body is provided with cylinder hoop；Lead in described and variable annular annular seal space is formed between set and the external wall of live post and inboard wall of cylinder block；Characterized in that, the bottom of the live post body is provided with the plugging device for sealing live post intracoelomic cavity；The exhaust passage of live post intracoelomic cavity and extraneous air is communicated with column cap；Variable column sealed chamber is formed between the bottom face of plugging device and the cylinder bottom inwall, inboard wall of cylinder block and live post body；The variable annular annular seal space and variable column sealed chamber are equipped with liquid in-out device.
The liquid in-out device include being opened in cylinder bottom, cylinder body and in lead to the liquid-through hole that puts, cylinder body and in lead to the liquid-through hole put and communicate and is integrated；Liquid-through hole outer end is welded with the interface for connecting fluid-through tube and joint.
The plugging device is a bushing for being welded on live post intracoelomic cavity bottom, and bushing base opening is not less than live post body base opening, top opening sealing.
The plugging device includes the bushing for being welded on live post intracoelomic cavity bottom, bushing both ends open, and its base opening is not less than live post body base opening, top opening welds a sealed disc, the center of disk is provided with axially extending bore, and sealing-plug is installed in hole, stop washer is set between sealing-plug and the abutted surface of disk.
From top to bottom order is set for the axial direction of the dust ring, seal assembly and guide ring along live post body.
The dust ring, seal assembly and guide ring are by the way of groove installation.
The outer end of the exhaust passage is arranged in be hinged axis hole.
The outer end of the exhaust passage is located at the side of column cap, and is provided with screwed plug.
Another scheme, a kind of suspended type hydraulic vertical prop, including cylinder bottom, guide ring, seal assembly, cylinder body, hoisting ring, retainer ring, cylinder hoop, in lead to set, dust ring, column cap, be hinged axis hole, stud, joint, live post body, fluid-through tube, interface；Described column cap is welded as a whole with live post body upper end, and be hinged axis hole is provided with the top of column cap；Described cylinder bottom is welded as a whole with cylinder body, and the outside of cylinder body is welded with the retainer ring with hoisting ring；Lead to set during portion disposed thereon is provided between the cylinder body and live post body, in lead between set and live post body and be provided with dust ring, seal assembly and guide ring, in lead between set and cylinder body and be provided with seal assembly, and in the logical top that covers it is circumferentially fixed with cylinder body by stud；Seal assembly and guide ring are set between the outer wall of live post body lower end and the inwall of cylinder body；The position for leading to set in being corresponded to outside the cylinder body is provided with cylinder hoop；Lead in described and variable annular annular seal space is formed between set and the external wall of live post and inboard wall of cylinder block；Variable column sealed chamber is formed between the column cap inwall and inboard wall of cylinder living, cylinder bottom inwall, inboard wall of cylinder block；The variable annular annular seal space and variable column sealed chamber are equipped with liquid in-out device；The exhaust passage of variable column sealed chamber and extraneous air is communicated with the column cap.
The cavity bottom of the live post body, which is set, strengthens bushing, and the bottom of the bushing is not less than the base opening of live post body.
The outer end of the exhaust passage is located at the side of column cap, and is provided with screwed plug, and the screwed plug sets seal assembly.
A kind of suspended type hydraulic vertical prop of the present invention, suitable on the hydraulic support of underground coal mine fully-mechanized mining working, major advantage has：
1 compared with prior art, and a kind of suspended type hydraulic vertical prop of the invention is simple in construction, and compact and reasonable, processing technology is simple, and production cost is low；
2 when live post intracoelomic cavity and each independent variable column sealed cavity, and hydraulic vertical prop is small to the dosage of emulsion；
3 when live post intracoelomic cavity connects with variable column sealed cavity, variable column sealed cavity capacity increase, the length of column internal emulsification liquid column at least adds one times, the ability pressed with substantially increasing column shock resistance, especially suitable for pressure bump behavior frequently on fully-mechanized mining working surface hydraulic support.
The increase of 4 bushings, improve the intensity of live post body movable end, the reliability of enhancing hydraulic vertical prop activity.
Exhaust passage is provided with 5 hydraulic vertical prop column caps, can effectively drain the gas in column, prevents that air expansion causes live post body bulging in live post body, improves the support performance of column.
A kind of suspended type hydraulic vertical prop of the present invention is a kind of preferably fully-mechanized mining working surface hydraulic support hydraulic vertical prop, has wide applicability.
Brief description of the drawings
Accompanying drawing 1 is the sectional structure chart of the embodiment of the present invention one.
Accompanying drawing 2 is the sectional structure chart of the embodiment of the present invention two.
Accompanying drawing 3 is the sectional structure chart of the embodiment of the present invention three.
Accompanying drawing 4 is the sectional structure chart of the embodiment of the present invention four.
Accompanying drawing 5 is the sectional structure chart of the embodiment of the present invention five.
Accompanying drawing 6 is the sectional structure chart of the embodiment of the present invention six.
In accompanying drawing：Cylinder bottom -1, sealing-plug -2, guide ring -3, seal assembly -4, bushing -5, cylinder body -6, hoisting ring -7, retainer ring -8, guide ring -9, cylinder hoop -10, seal assembly -11, in lead to set -12, dust ring -13, column cap -14, be hinged axis hole -15, exhaust passage -16, screwed plug -17, stud -18, seal assembly -19, joint -20, live post body -21, joint -22, fluid-through tube -23, disk -24, interface -25, stop washer -26, seal assembly -27, seal assembly -28.
Embodiment
The invention will be further described for embodiment in below in conjunction with the accompanying drawings：
Embodiment one：As shown in Figure 1, a kind of suspended type hydraulic vertical prop, mainly includes：Cylinder bottom 1, guide ring 3,9, seal assembly 4,11,19,27, bushing 5, cylinder body 6, hoisting ring 7, retainer ring 8, cylinder hoop 10, in lead to set 12, dust ring 13, column cap 14, be hinged axis hole 15, exhaust passage 16, stud 18, joint 20,22, live post body 21, fluid-through tube 23, interface 25, described column cap 14 are welded as a whole with the upper end of live post body 21, and the top of column cap 14 is provided be hinged axis hole；Described cylinder bottom 1 is welded as a whole with cylinder body 6, and the outside of cylinder body 6 is welded with the retainer ring 8 with hoisting ring 7；Lead to set 12 during portion disposed thereon is provided between the cylinder body 6 and live post body 21, in lead between set 12 and live post body 21 and be provided with dust ring 13, seal assembly 19 and guide ring 9, the sequentially setting from top to bottom of axial direction of the dust ring 13, seal assembly 19 and guide ring 9 along live post body 21.In lead between set 12 and cylinder body 6 and be provided with seal assembly 11, and in lead to cover 12 top it is circumferentially fixed by stud 18 and cylinder body 6；Seal assembly 4 and guide ring 3 are set between the outer wall of the lower end of live post body 21 and the inwall of cylinder body 6；The dust ring 13, seal assembly 4,11,19 and guide ring 3,9 are by the way of groove installation.The position for leading to set 12 during the outside of cylinder body 6 is corresponding is provided with cylinder hoop 10；Lead in described and variable annular annular seal space is formed between set 12 and the outer wall of live post body 21 and the inwall of cylinder body 6；The bottom of the live post body 21 is provided with the plugging device for sealing live post intracoelomic cavity；The inner chamber of live post body 21 and the exhaust passage 16 of extraneous air are communicated with column cap 14；The outer end of the exhaust passage 16 is located at the side of column cap 14, and is provided with screwed plug 17.Variable column sealed chamber is formed between the bottom face of the inwall of plugging device and cylinder bottom 1, the inwall of cylinder body 6 and live post body 21；The variable annular annular seal space and variable column sealed chamber are equipped with liquid in-out device.The liquid in-out device include being opened in cylinder bottom 1, cylinder body 6 and in lead to the liquid-through hole on set 12, cylinder body 6 and in the liquid-through hole that leads on set 12 communicate and be integrated；Liquid-through hole outer end is welded with the interface 25 for connecting fluid-through tube 23 and joint 22.The plugging device includes the bushing 5 for being welded on the inner chamber bottom of live post body 21, the both ends open of bushing 5, its base opening is not less than the base opening of live post body 21, top opening welds a sealed disc 24, the center of disk 24 is provided with axially extending bore, sealing-plug 2 is installed in hole, stop washer 26 is set between sealing-plug 2 and the abutted surface of disk 24.
Embodiment two：As shown in Figure 2, substantially the same manner as Example 1, difference is：The outer end of the exhaust passage 16 is arranged in be hinged axis hole 15.
Embodiment three：As shown in Figure 3, substantially the same manner as Example 1, difference is：The plugging device is a bushing 5 for being welded on the inner chamber bottom of live post body 21, and the base opening of bushing 5 is not less than the base opening of live post body 21, top opening sealing.
Example IV：As shown in Figure 4, substantially the same manner as Example 3, difference is：The outer end of the exhaust passage 16 is located at the side of column cap 14, and is provided with screwed plug 17.
Embodiment five：As shown in Figure 5, substantially the same manner as Example 1, difference is：Plugging device is removed, a bushing 5 for being used to strengthen its bottom intensity is only set in the bottom of live post body 21, and the inner chamber of described column cap 14, live post body 21 and cylinder bottom 1 communicates, and screwed plug 17 encrypts sealing assembly.
Embodiment six：As shown in Figure 6, substantially the same manner as Example 5, difference is：The bottom of the live post body 21 is not provided with bushing 5.
By above-described embodiment it can be seen that, the hydraulic vertical prop of embodiment 1,2,3 and 4 structure types is small to the dosage of emulsion, the air that exhaust passage 16 is added in column cap can effectively drain in column improves the support performance of column, and the stability of live post body 21 obtains larger raising.
The hydraulic vertical prop of embodiment 5 and 6 is again provided with exhaust passage 16, but its variable column sealed cavity becomes big, the length of column internal emulsification liquid column at least adds one times, the ability pressed with substantially increasing column shock resistance, especially suitable for pressure bump behavior frequently on fully-mechanized mining working surface hydraulic support.Embodiment 5 compares embodiment 6, and the abrasion resistance properties and intensity of its live post body 21 are greatly improved.But embodiment 5 is simple for structure, cost is relatively saved.
The course of work：
When column setting prop, highly pressurised liquid enters variable column sealed cavity by joint 22, and with the injection of liquid, the liquid in variable annular seal cavity returns to fuel tank by joint 20, so as to reach the purpose of setting prop.
When post drops in column, highly pressurised liquid injects liquid by joint 20 into variable annular seal cavity, and with the injection of liquid, the liquid in variable column sealed cavity lets out oil return box by joint 22, so as to reach drop post purpose.
Highly pressurised liquid often injects and released once, and column just supports and dropped post once, and such hydraulic vertical prop just completes a working cycles.
Claims (10)
1. a kind of suspended type hydraulic vertical prop, including cylinder bottom, guide ring, seal assembly, cylinder body, hoisting ring, retainer ring, cylinder hoop, in lead to set, dust ring, column cap, be hinged axis hole, stud, joint, live post body, fluid-through tube, interface；Described column cap is welded as a whole with live post body upper end, and be hinged axis hole is provided with the top of column cap；Described cylinder bottom is welded as a whole with cylinder body, and the outside of cylinder body is welded with the retainer ring with hoisting ring；Lead to set during portion disposed thereon is provided between the cylinder body and live post body, in lead between set and live post body and be provided with dust ring, seal assembly and guide ring, in lead between set and cylinder body and be provided with seal assembly, and in the logical top that covers it is circumferentially fixed with cylinder body by stud；Seal assembly and guide ring are set between the outer wall of live post body lower end and the inwall of cylinder body；The position for leading to set in being corresponded to outside the cylinder body is provided with cylinder hoop；Lead in described and variable annular annular seal space is formed between set and the external wall of live post and inboard wall of cylinder block；Characterized in that, the bottom of the live post body is provided with the plugging device for sealing live post intracoelomic cavity；The exhaust passage of live post intracoelomic cavity and extraneous air is communicated with column cap；Variable column sealed chamber is formed between the bottom face of plugging device and the cylinder bottom inwall, inboard wall of cylinder block and live post body；The variable annular annular seal space and variable column sealed chamber are equipped with liquid in-out device.
A kind of 2. suspended type hydraulic vertical prop according to claim 1, it is characterised in that the liquid in-out device include being opened in cylinder bottom, cylinder body and in lead to the liquid-through hole that puts, cylinder body and in lead to the liquid-through hole put and communicate and is integrated；Liquid-through hole outer end is welded with the interface for connecting fluid-through tube and joint.
3. a kind of suspended type hydraulic vertical prop according to claim 1, it is characterised in that the plugging device is a bushing for being welded on live post intracoelomic cavity bottom, and bushing base opening is not less than live post body base opening, top opening sealing.
A kind of 4. suspended type hydraulic vertical prop according to claim 1, it is characterized in that, the plugging device includes the bushing for being welded on live post intracoelomic cavity bottom, bushing both ends open, its base opening is not less than live post body base opening, and top opening welds a sealed disc, and the center of disk is provided with axially extending bore, sealing-plug is installed in hole, stop washer is set between sealing-plug and the abutted surface of disk.
5. a kind of suspended type hydraulic vertical prop according to claim 1, it is characterised in that from top to bottom order is set for the axial direction of the dust ring, seal assembly and guide ring along live post body；The dust ring, seal assembly and guide ring are by the way of groove installation.
6. a kind of suspended type hydraulic vertical prop according to claim 1, it is characterised in that the outer end of the exhaust passage is arranged in be hinged axis hole.
7. a kind of suspended type hydraulic vertical prop according to claim 1, it is characterised in that the outer end of the exhaust passage is located at the side of column cap, and is provided with screwed plug.
8. a kind of suspended type hydraulic vertical prop, including cylinder bottom, guide ring, seal assembly, cylinder body, hoisting ring, retainer ring, cylinder hoop, in lead to set, dust ring, column cap, be hinged axis hole, stud, joint, live post body, fluid-through tube, interface；Described column cap is welded as a whole with live post body upper end, and be hinged axis hole is provided with the top of column cap；Described cylinder bottom is welded as a whole with cylinder body, and the outside of cylinder body is welded with the retainer ring with hoisting ring；Lead to set during portion disposed thereon is provided between the cylinder body and live post body, in lead between set and live post body and be provided with dust ring, seal assembly and guide ring, in lead between set and cylinder body and be provided with seal assembly, and in the logical top that covers it is circumferentially fixed with cylinder body by stud；Seal assembly and guide ring are set between the outer wall of live post body lower end and the inwall of cylinder body；The position for leading to set in being corresponded to outside the cylinder body is provided with cylinder hoop；Lead in described and variable annular annular seal space is formed between set and the external wall of live post and inboard wall of cylinder block；Variable column sealed chamber is formed between the column cap inwall and inboard wall of cylinder living, cylinder bottom inwall, inboard wall of cylinder block；The variable annular annular seal space and variable column sealed chamber are equipped with liquid in-out device；Characterized in that, the exhaust passage of variable column sealed chamber and extraneous air is communicated with the column cap.
9. a kind of suspended type hydraulic vertical prop according to claim 8, it is characterised in that the cavity bottom of the live post body, which is set, strengthens bushing, and the bottom of the bushing is not less than the base opening of live post body.
10. a kind of suspended type hydraulic vertical prop according to claim 8 or claim 9, it is characterised in that the outer end of the exhaust passage is located at the side of column cap, and is provided with screwed plug, and the screwed plug sets seal assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610302897.2A CN107355243A (en) | 2016-05-10 | 2016-05-10 | A kind of suspended type hydraulic vertical prop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610302897.2A CN107355243A (en) | 2016-05-10 | 2016-05-10 | A kind of suspended type hydraulic vertical prop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107355243A true CN107355243A (en) | 2017-11-17 |
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ID=60272057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610302897.2A Pending CN107355243A (en) | 2016-05-10 | 2016-05-10 | A kind of suspended type hydraulic vertical prop |
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| CN (1) | CN107355243A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2871845Y (en) * | 2006-01-18 | 2007-02-21 | 山东矿机集团有限公司 | Single externally-injectting hydraulic pillar |
| CN101105132A (en) * | 2007-07-27 | 2008-01-16 | 中国矿业大学 | Single extension suspended type hydraulic vertical prop |
| CN201330611Y (en) * | 2009-01-07 | 2009-10-21 | 徐州天能机电有限责任公司 | Double-action plunger type upright post for hydraulic support |
| CN201334913Y (en) * | 2008-12-30 | 2009-10-28 | 中国矿业大学 | Exhaust single hydraulic prop |
| CN101984221A (en) * | 2010-05-28 | 2011-03-09 | 金湖小青青机电设备有限公司 | Suspended hydraulic column |
| CN202012358U (en) * | 2011-03-31 | 2011-10-19 | 重庆忠惠机械有限责任公司 | Individual hydraulic prop for mine |
| CN102704959A (en) * | 2012-07-09 | 2012-10-03 | 中国矿业大学 | Hinged type suspension hydraulic column |
| CN205638502U (en) * | 2016-05-10 | 2016-10-12 | 徐州神安矿山机械科技有限公司 | Floated hydraulic column |
-
2016
- 2016-05-10 CN CN201610302897.2A patent/CN107355243A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2871845Y (en) * | 2006-01-18 | 2007-02-21 | 山东矿机集团有限公司 | Single externally-injectting hydraulic pillar |
| CN101105132A (en) * | 2007-07-27 | 2008-01-16 | 中国矿业大学 | Single extension suspended type hydraulic vertical prop |
| CN201334913Y (en) * | 2008-12-30 | 2009-10-28 | 中国矿业大学 | Exhaust single hydraulic prop |
| CN201330611Y (en) * | 2009-01-07 | 2009-10-21 | 徐州天能机电有限责任公司 | Double-action plunger type upright post for hydraulic support |
| CN101984221A (en) * | 2010-05-28 | 2011-03-09 | 金湖小青青机电设备有限公司 | Suspended hydraulic column |
| CN202012358U (en) * | 2011-03-31 | 2011-10-19 | 重庆忠惠机械有限责任公司 | Individual hydraulic prop for mine |
| CN102704959A (en) * | 2012-07-09 | 2012-10-03 | 中国矿业大学 | Hinged type suspension hydraulic column |
| CN205638502U (en) * | 2016-05-10 | 2016-10-12 | 徐州神安矿山机械科技有限公司 | Floated hydraulic column |
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| PB01 | Publication | ||
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Application publication date: 20171117 |