CN111075484B - Collapse-preventing portable foundation secondary support protection equipment - Google Patents
Collapse-preventing portable foundation secondary support protection equipment Download PDFInfo
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- CN111075484B CN111075484B CN202010027961.7A CN202010027961A CN111075484B CN 111075484 B CN111075484 B CN 111075484B CN 202010027961 A CN202010027961 A CN 202010027961A CN 111075484 B CN111075484 B CN 111075484B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 57
- 150000001875 compounds Chemical class 0.000 claims description 20
- 230000001681 protective effect Effects 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract 1
- 239000002689 soil Substances 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 21
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 3
- 230000004083 survival effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
- E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
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- 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
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
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Abstract
A collapse-preventing portable foundation secondary support protection device comprises a vehicle body, wherein a third transmission cavity is arranged in the vehicle body, a soil loosening and tamping device for loosening or tamping earthwork is arranged in the third transmission cavity, a switching cavity is arranged in the end wall of the right side of the third transmission cavity, an excavating and filling device capable of excavating the earthwork or conveying the earthwork to the ground is arranged in the switching cavity, a conveying cavity is arranged in the end wall of the right side of the switching cavity, and a conveying device capable of conveying the earthwork excavated by the excavating and filling device out or conveying the earthwork into the excavating and filling device is arranged in the conveying cavity; the device has the advantages of simple structure, convenient operation and convenient maintenance, can realize multiple purposes of one machine, realizes one machine for digging and filling, avoids resource waste caused by purchasing multiple construction devices in the construction process, saves a large amount of labor force, simultaneously avoids switching operation of multiple devices on site, improves the operation efficiency and saves the cost, and therefore, the device has higher use and popularization values.
Description
Technical Field
The invention relates to the field of building construction, in particular to anti-collapse portable foundation secondary support protection equipment.
Background
With the increasing of the general population of human beings and the continuous development of society, mineral resources required by the world are increased continuously, and mineral resources available for all people are reduced continuously, so that the mining strength of the mineral resources is continuously improved while new energy is expanded by each country so as to meet the development requirements of the country;
then mineral resources are often located in the deep underground due to the limitation of generation conditions, so that the mining process is operated underground all the time, due to the limitation of the existing mining technology, under certain conditions, if the operation is not standard, the mechanical structure of an underground rock stratum is damaged to cause a collapse accident, operating personnel are trapped underground, and the collapse area needs to be temporarily supported in the rescue process to avoid the occurrence of a secondary accident;
but current interim support device is bulky, is difficult for carrying, and the support process is loaded down with trivial details, and can't work in narrow and small region, greatly influences the efficiency of suing and labouring, reduces stranded personnel's survival rate.
Disclosure of Invention
It is an object of the present invention to provide a collapse resistant portable foundation secondary support protection device that overcomes the above-mentioned deficiencies of the prior art.
A collapse-preventing portable basic secondary supporting protection device comprises a main body, wherein a primary supporting cavity is formed in the main body, a primary supporting device is arranged in the primary supporting cavity and comprises a limiting groove arranged in the end wall of the top of the primary supporting cavity, a sliding block capable of sliding left and right is arranged in the limiting groove, a primary supporting rod hinged with the sliding block is arranged in the primary supporting cavity, a secondary supporting device is arranged in the primary supporting rod and comprises a secondary supporting cavity arranged in the primary supporting rod, a piston capable of sliding left and right is arranged in the secondary supporting cavity, a secondary supporting rod capable of sliding left and right is arranged in the secondary supporting cavity, the secondary supporting rod is fixedly connected with the piston, and a rotatable rotating rod is arranged at one end, located in the primary supporting cavity, of the secondary supporting rod, the rotatable backup pad that is used for supporting that is equipped with on the dwang, be equipped with skid-proof slipmat on the backup pad outer wall, the one-level is supported and is equipped with the transmission chamber in the chamber right side end wall, be equipped with the power chamber in the transmission chamber right side end wall, the power intracavity is equipped with power device, the power intracavity is equipped with transmission, transmission can with in the drive power transmission to each device that power device produced, the power intracavity is equipped with and promotes the hydraulic means of second grade strutting arrangement work, power device is including locating motor in the chamber right side end wall, the power intracavity be equipped with the power shaft that the motor is connected, the power shaft left end is equipped with power gear, and then but power transmission extremely in the transmission.
Preferably, the transmission device comprises a compound gear arranged in the power cavity, the compound gear is meshed with the power gear, the power gear can drive the compound gear to rotate so as to drive the transmission device to work, a transmission shaft is arranged in the power cavity, a sun gear is arranged at one end of the transmission shaft positioned in the power cavity, the sun gear and the compound gear are in meshing transmission through a planetary gear, one end of the transmission shaft, which is positioned in the transmission cavity, is provided with a driving gear, a screw rod is arranged in the limit groove, a driven gear meshed with the driving gear is arranged at one end of the screw rod, which is positioned in the transmission cavity, wherein one end of the transmission cavity, which is positioned in the limit groove, is connected with the slide block in a thread fit way, and then the transmission device can transmit power into the primary supporting device, and further drive the primary supporting device to work.
Preferably, the hydraulic device comprises a hydraulic pump arranged in the right end wall of the power cavity, a pump shaft in power connection with the hydraulic pump is arranged in the power cavity, a pump gear meshed with the compound gear is arranged on the pump shaft, and the transmission device can transmit power into the hydraulic device so as to drive the hydraulic device to work; the limiting groove top end wall is internally provided with an oil storage cavity, the oil storage cavity is communicated with the hydraulic pump through an oil outlet pipeline, a flow divider is arranged in the end wall of the right side of the hydraulic pump, the flow divider is communicated with the hydraulic pump through the oil outlet pipeline, the flow divider is communicated with the second-stage supporting cavity through a branch pipeline, an overflow one-way valve is arranged in the branch pipeline, a junction station is arranged in the end wall of the right side of the oil storage cavity, the junction station is communicated with the oil storage cavity through an oil return pipeline, the oil return pipeline is communicated with the second-stage supporting cavity through a return pipeline, the overflow one-way valve is arranged in the return pipeline, and then the hydraulic device can drive the second-stage supporting device to work and carry out second-stage supporting on a place with a collapse hidden danger.
Preferably, a pipe storage cavity is arranged in the end wall of the right side of the power cavity, two groups of fixing shafts are arranged in the pipe storage cavity, a rotatable rotating shaft is arranged on the outer wall of each fixing shaft, the rotating shaft is elastically connected with the corresponding fixing shaft through a torsion spring, and the branch pipeline and the return pipeline are wound on the two groups of rotating shafts respectively, so that a certain amount of pipelines can be stored, and the normal work of the secondary supporting device is guaranteed.
Preferably, the power cavity is internally provided with a curved bar fixedly connected with the compound gear, the tail end of the curved bar is provided with a rotatable handle, the equipment can be operated in a manual mode, and the phenomenon that the equipment cannot be used due to lack of electric power is avoided.
The invention has the beneficial effects that: the device is simple in structure, convenient to operate and maintain, small in size, convenient to carry and convenient to explore a narrow area, can temporarily support the position with the collapse hidden danger, enlarges the range of movement of the area by using the secondary supporting device, improves the rescue efficiency of trapped people, and improves the survival rate of the trapped people, so that the device has high use and popularization values.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic view of the overall construction of a collapse resistant portable base secondary support protection device;
FIG. 2 is a schematic view of the structure A-A of FIG. 1;
FIG. 3 is a schematic diagram of B-B of FIG. 2;
FIG. 4 is an enlarged schematic view of the structure C in FIG. 2;
fig. 5 is an enlarged schematic view of the structure D in fig. 2.
Detailed Description
The present invention will be described in detail with reference to the drawings, wherein for the convenience of description, the following orientations are defined as follows: the front, rear, left, and right described below correspond to the up-down direction of the projection relationship of fig. 1 itself.
As shown in fig. 1-5, a portable basic secondary supporting protection device for preventing collapse comprises a main body 11, the main body 11 includes a primary supporting cavity 47 therein, a primary supporting device 100 is disposed in the primary supporting cavity 47, the primary supporting device 100 includes a limiting groove 48 disposed in an end wall of a top portion of the primary supporting cavity 47, a sliding block 31 capable of sliding left and right is disposed in the limiting groove 48, a primary supporting rod 32 hinged to the sliding block 31 is disposed in the primary supporting cavity 47, a secondary supporting device 200 is disposed in the primary supporting rod 32, the secondary supporting cavity 46 is disposed in the primary supporting rod 32, a piston 33 capable of sliding left and right is disposed in the secondary supporting cavity 46, a secondary supporting rod 34 capable of sliding left and right is disposed in the secondary supporting cavity 46, wherein the secondary supporting rod 34 is fixedly connected to the piston 33, one end that second grade bracing piece 34 is located in one-level support chamber 47 is equipped with rotatable dwang 36, rotatable backup pad 37 that is used for supporting that is equipped with on dwang 36, be equipped with skid-proof slipmat 38 on the backup pad 37 outer wall, be equipped with transmission chamber 49 in the one-level support chamber 47 right side end wall, be equipped with power chamber 12 in the transmission chamber 49 right side end wall, be equipped with power device 300 in the power chamber 12, be equipped with transmission 400 in the power chamber 12, transmission 400 can with the drive power transmission that power device 300 produced to each device in, be equipped with in the power chamber 12 and promote hydraulic means 500 that second grade strutting arrangement 200 worked, power device 300 is including locating motor 15 in the power chamber 12 right side end wall, be equipped with in the power chamber 12 with the power shaft 14 that motor 15 is connected, power shaft 14 left end is equipped with power gear 13, and thus power can be transmitted into the transmission 400.
Advantageously, the transmission device 400 includes a compound gear 16 disposed in the power cavity 12, the compound gear 16 is engaged with the power gear 13, and the power gear 13 can drive the compound gear 16 to rotate so as to drive the transmission device 400 to work, a transmission shaft 19 is disposed in the power cavity 12, a sun gear 18 is disposed at one end of the transmission shaft 19 located in the power cavity 12, the sun gear 18 is in engaged transmission with the compound gear 16 through a planetary gear 17, a driving gear 21 is disposed at one end of the transmission shaft 19 located in the transmission cavity 49, a screw 39 is disposed in the limiting groove 48, a driven gear 22 engaged with the driving gear 21 is disposed at one end of the screw 39 located in the transmission cavity 49, wherein one end of the transmission cavity 49 located in the limiting groove 48 is connected with the slider 31 through a screw thread fit, the transmission device 400 can transmit power into the primary supporting device 100, so as to drive the primary supporting device 100 to work.
Advantageously, the hydraulic device 500 comprises a hydraulic pump 25 disposed in the right end wall of the power chamber 12, a pump shaft 24 is disposed in the power chamber 12 and is in power connection with the hydraulic pump 25, a pump gear 23 engaged with the compound gear 16 is disposed on the pump shaft 24, and the transmission 400 can transmit power to the hydraulic device 500 to drive the hydraulic device 500 to operate; an oil storage cavity 50 is arranged in the top end wall of the limiting groove 48, the oil storage cavity 50 is communicated with the hydraulic pump 25 through an oil outlet pipeline 28, a flow divider 29 is arranged in the right end wall of the hydraulic pump 25, the flow divider 29 is communicated with the hydraulic pump 25 through an oil outlet pipeline 28, the flow divider 29 communicates with the secondary support chamber 46 via a branch line 30, wherein, an overflow one-way valve 45 is arranged in the branch pipeline 30, a confluence device 40 is arranged in the end wall of the right side of the oil storage cavity 50, the confluence device 40 is communicated with the oil storage cavity 50 through an oil return pipeline 41, the oil return pipeline 41 is communicated with the secondary support cavity 46 through a return pipeline 35, an overflow check valve 45 is arranged in the return pipeline 35, so that the hydraulic device 500 can drive the secondary supporting device 200 to work, and secondary support is performed on a place with a collapse hidden danger.
Advantageously, a pipe storage chamber 42 is arranged in the right end wall of the power chamber 12, two sets of fixed shafts 44 are arranged in the pipe storage chamber 42, a rotatable rotating shaft 51 is arranged on the outer wall of each fixed shaft 44, the rotating shaft 51 is elastically connected with the fixed shafts 44 through a torsion spring 43, wherein the branch pipe 30 and the return pipe 35 are respectively wound on the two sets of rotating shafts 51, so that a certain amount of pipes can be stored, and the normal operation of the secondary support device 200 is ensured.
Advantageously, a curved rod 20 fixedly connected with the compound gear 16 is arranged in the power cavity 12, a rotatable handle 27 is arranged at the tail end of the curved rod 20, and the device can be operated manually, so that the phenomenon that the device cannot be used due to lack of electric power is avoided.
When the equipment is used, the equipment is placed at a position with a collapse hidden danger, the motor 15 starts to work and drives the power gear 13 to rotate through the power shaft 14, so as to drive the compound gear 16 to rotate, further drives the screw rod 39 to rotate through the planet gear 17, the transmission shaft 19, the driving gear 21 and the driven gear 22, so as to drive the slide block 31 to slide, further drives the primary support rod 32 to rotate and extend out of the primary support cavity 47, and pushes the support plate 37 to slide through the rotating rod 36, so as to carry out primary support on the position with the collapse hidden danger, meanwhile, the compound gear 16 drives the hydraulic pump 25 to work through the pump gear 23 and the pump shaft 24, so as to suck hydraulic oil in the oil storage cavity 50 into the hydraulic pump 25 through the oil conveying pipeline 26 and pressurize the hydraulic pump, and further drives the piston 33 to slide rightwards through the oil outlet pipeline 28, the flow divider 29, the branch pipeline 30 and the overflow check valve 45, and then through second grade bracing piece 34, dwang 36 promotes backup pad 37 and slides, carries out the second grade to the position that has the collapse hidden danger and supports, and the hydraulic oil in second grade support chamber 46 passes through overflow check valve 45 simultaneously, return line 35, flow combiner 40, returns oil return line 41 and flows back to in the oil storage chamber 50.
The invention has the beneficial effects that: the device is simple in structure, convenient to operate and maintain, small in size, convenient to carry and convenient to explore a narrow area, can temporarily support the position with the collapse hidden danger, enlarges the range of movement of the area by using the secondary supporting device, improves the rescue efficiency of trapped people, and improves the survival rate of the trapped people, so that the device has high use and popularization values.
The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.
Claims (5)
1. A collapse-preventing portable basic secondary supporting protection device comprises a main body, wherein a primary supporting cavity is formed in the main body, a primary supporting device is arranged in the primary supporting cavity and comprises a limiting groove arranged in the end wall of the top of the primary supporting cavity, a sliding block capable of sliding left and right is arranged in the limiting groove, a primary supporting rod hinged with the sliding block is arranged in the primary supporting cavity, a secondary supporting device is arranged in the primary supporting rod and comprises a secondary supporting cavity arranged in the primary supporting rod, a piston capable of sliding left and right is arranged in the secondary supporting cavity, a secondary supporting rod capable of sliding left and right is arranged in the secondary supporting cavity, the secondary supporting rod is fixedly connected with the piston, and a rotatable rotating rod is arranged at one end, located in the primary supporting cavity, of the secondary supporting rod, the rotatable backup pad that is used for supporting that is equipped with on the dwang, be equipped with skid-proof slipmat on the backup pad outer wall, the one-level is supported and is equipped with the transmission chamber in the chamber right side end wall, be equipped with the power chamber in the transmission chamber right side end wall, the power intracavity is equipped with power device, the power intracavity is equipped with transmission, transmission can with in the drive power transmission to each device that power device produced, the power intracavity is equipped with and promotes the hydraulic means of second grade strutting arrangement work, power device is including locating motor in the chamber right side end wall, the power intracavity be equipped with the power shaft that the motor is connected, the power shaft left end is equipped with power gear, and then but power transmission extremely in the transmission.
2. An anti-collapse portable foundation secondary support protection device according to claim 1, wherein: the transmission device comprises a compound gear arranged in the power cavity, the compound gear is meshed with the power gear, the power gear can drive the compound gear to rotate so as to drive the transmission device to work, a transmission shaft is arranged in the power cavity, a sun gear is arranged at one end of the transmission shaft positioned in the power cavity, the sun gear and the compound gear are in meshing transmission through a planetary gear, one end of the transmission shaft, which is positioned in the transmission cavity, is provided with a driving gear, a screw rod is arranged in the limit groove, a driven gear meshed with the driving gear is arranged at one end of the screw rod, which is positioned in the transmission cavity, wherein one end of the transmission cavity, which is positioned in the limit groove, is connected with the slide block in a thread fit way, and then the transmission device can transmit power into the primary supporting device, and further drive the primary supporting device to work.
3. An anti-collapse portable foundation secondary support protection device according to claim 2, wherein: the hydraulic device comprises a hydraulic pump arranged in the right end wall of the power cavity, a pump shaft in power connection with the hydraulic pump is arranged in the power cavity, a pump gear meshed with the compound gear is arranged on the pump shaft, and the transmission device can transmit power into the hydraulic device so as to drive the hydraulic device to work; the limiting groove top end wall is internally provided with an oil storage cavity, the oil storage cavity is communicated with the hydraulic pump through an oil outlet pipeline, a flow divider is arranged in the end wall of the right side of the hydraulic pump, the flow divider is communicated with the hydraulic pump through the oil outlet pipeline, the flow divider is communicated with the second-stage supporting cavity through a branch pipeline, an overflow one-way valve is arranged in the branch pipeline, a junction station is arranged in the end wall of the right side of the oil storage cavity, the junction station is communicated with the oil storage cavity through an oil return pipeline, the oil return pipeline is communicated with the second-stage supporting cavity through a return pipeline, the overflow one-way valve is arranged in the return pipeline, and then the hydraulic device can drive the second-stage supporting device to work and carry out second-stage supporting on a place with a collapse hidden danger.
4. A collapse resistant portable foundation secondary support protective device according to claim 3, further comprising: the improved two-stage support device is characterized in that a pipe storage cavity is arranged in the end wall of the right side of the power cavity, two groups of fixed shafts are arranged in the pipe storage cavity, a rotatable rotating shaft is arranged on the outer wall of each fixed shaft, the rotating shafts are elastically connected with the fixed shafts through torsion springs, and branch pipelines and return pipelines are wound on the two groups of rotating shafts respectively, so that a certain amount of pipelines can be stored, and the normal work of the two-stage support device is guaranteed.
5. A collapse resistant portable foundation secondary support protective device according to claim 4, further comprising: the power intracavity be equipped with compound gear fixed connection's curved bar, the curved bar end is equipped with rotatable handle, and this equipment accessible manual mode carries out the operation, avoids causing the unable phenomenon of using of equipment because of lacking electric power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010027961.7A CN111075484B (en) | 2020-01-10 | 2020-01-10 | Collapse-preventing portable foundation secondary support protection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010027961.7A CN111075484B (en) | 2020-01-10 | 2020-01-10 | Collapse-preventing portable foundation secondary support protection equipment |
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| Publication Number | Publication Date |
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| CN111075484A CN111075484A (en) | 2020-04-28 |
| CN111075484B true CN111075484B (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010027961.7A Active CN111075484B (en) | 2020-01-10 | 2020-01-10 | Collapse-preventing portable foundation secondary support protection equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201474716U (en) * | 2009-08-26 | 2010-05-19 | 四川神坤装备股份有限公司 | Large mining height hydraulic bracket multilevel wall supporting mechanism |
| CN102121390A (en) * | 2011-03-11 | 2011-07-13 | 辽宁天安矿山科技有限公司 | Telescopic tunneling immediate support device |
| CN205977254U (en) * | 2016-08-26 | 2017-02-22 | 兖矿集团有限公司 | Novel mechanism of group is protected to third grade |
| CN108361052A (en) * | 2018-05-02 | 2018-08-03 | 石家庄煤矿机械有限责任公司 | Without the support quick holder of self-loopa repeatedly |
| CN108412528A (en) * | 2018-04-23 | 2018-08-17 | 山东塔高矿业机械装备制造有限公司 | Based on the hydraulic support device and method for protecting support for extending tunnel |
| CN108843352A (en) * | 2018-06-22 | 2018-11-20 | 孙培清 | A kind of underground portable rack |
| CN109630165A (en) * | 2018-12-28 | 2019-04-16 | 上海工程技术大学 | A kind of underground mine use two column protected type electrichydraulic control hydraulic support |
| CN109931083A (en) * | 2019-03-15 | 2019-06-25 | 天地科技股份有限公司 | A kind of triple retractable column with two levels of support function |
-
2020
- 2020-01-10 CN CN202010027961.7A patent/CN111075484B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201474716U (en) * | 2009-08-26 | 2010-05-19 | 四川神坤装备股份有限公司 | Large mining height hydraulic bracket multilevel wall supporting mechanism |
| CN102121390A (en) * | 2011-03-11 | 2011-07-13 | 辽宁天安矿山科技有限公司 | Telescopic tunneling immediate support device |
| CN205977254U (en) * | 2016-08-26 | 2017-02-22 | 兖矿集团有限公司 | Novel mechanism of group is protected to third grade |
| CN108412528A (en) * | 2018-04-23 | 2018-08-17 | 山东塔高矿业机械装备制造有限公司 | Based on the hydraulic support device and method for protecting support for extending tunnel |
| CN108361052A (en) * | 2018-05-02 | 2018-08-03 | 石家庄煤矿机械有限责任公司 | Without the support quick holder of self-loopa repeatedly |
| CN108843352A (en) * | 2018-06-22 | 2018-11-20 | 孙培清 | A kind of underground portable rack |
| CN109630165A (en) * | 2018-12-28 | 2019-04-16 | 上海工程技术大学 | A kind of underground mine use two column protected type electrichydraulic control hydraulic support |
| CN109931083A (en) * | 2019-03-15 | 2019-06-25 | 天地科技股份有限公司 | A kind of triple retractable column with two levels of support function |
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| CN111075484A (en) | 2020-04-28 |
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Inventor after: Du Fangjun Inventor after: Yu Zhirang Inventor after: Liu Fei Inventor after: Yuan Xingwang Inventor before: Yuan Xingwang |
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Effective date of registration: 20211025 Address after: 719000 Shanghe village, Jinjitan Town, Yuyang District, Yulin City, Shaanxi Province Applicant after: Shaanxi Yinhe Coal Development Co.,Ltd. Address before: 237300 Liwan formation, Qilian village, Gubei Town, Jinzhai County, Lu'an City, Anhui Province Applicant before: Yuan Xingwang |
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