CN111618331B - Deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device and method - Google Patents
Deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device and method Download PDFInfo
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- CN111618331B CN111618331B CN202010309356.9A CN202010309356A CN111618331B CN 111618331 B CN111618331 B CN 111618331B CN 202010309356 A CN202010309356 A CN 202010309356A CN 111618331 B CN111618331 B CN 111618331B
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- rod
- fixedly connected
- reaming
- anchor rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0042—Devices for removing chips
Abstract
The invention discloses a deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device, which comprises a main control box, wherein a drill rod penetrates through the side wall of the main control box, a control panel is fixedly connected to the side wall of the main control box, a cleaning mechanism is fixedly connected to the upper end of the main control box, two electric telescopic rods and driving motors which are symmetrical in position are fixedly connected to the inner wall of the main control box, and an indicating device is fixedly connected to the side wall of one electric telescopic rod; the invention also provides an operation method of the deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device, which comprises the following steps: s1, taking an anchor rod needing inner reaming and fixing the anchor rod on a clamp; s2, inserting the drill rod in the device into the inner hole of the anchor rod. The invention has reasonable structural design and has the advantages of convenient cleaning of scraps generated by inner reaming and convenient operation.
Description
Technical Field
The invention relates to the technical field of anchor rod inner reaming, in particular to a deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device.
Background
The anchor rod is the most basic component part of roadway support in contemporary coal mines, and the anchor rod reinforces surrounding rocks of the roadway together so that the surrounding rocks support themselves. The anchor rod is not only used for mines, but also used for engineering technology, and is used for reinforcing main bodies of slopes, tunnels and dam bodies.
In the prior art, the inner end part of the hole formed by drilling the traditional anchor rod is the same as the outer diameter of the hole, friction force is generated between the pressure grouting and the original soil layer to achieve the tensile strength of the anchor rod so as to meet the stability of a slope, the tensile strength of the tensile mode is weaker mainly by virtue of the friction force, the existing inner reaming device is inconvenient in reaming, the operation is complicated, and chips generated in the inner reaming device are difficult to clean, so that the mechanical device and the method for reaming the drill rod in the hole of the anchor rod for supporting the deep foundation pit are provided.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a deep basal pit supports anchor rod and becomes downthehole reaming drilling rod mechanical device, includes the master control case, the lateral wall department of master control case runs through and is provided with the drilling rod, fixedly connected with control panel on the lateral wall of master control case, the upper end fixedly connected with clean mechanism of master control case, two symmetrical electric telescopic handle and driving motor in position of fixedly connected with on the inner wall of master control case, one of them fixedly connected with indicating device on the lateral wall of electric telescopic handle, driving motor's output shaft end and fixedly connected with slewing mechanism, symmetrical lateral wall department all is provided with the side groove on the drilling rod, two all be provided with the movable rod in the side groove, two equal fixedly connected with guider on the lateral wall of movable rod, two the one end of movable rod is connected with through the joint device between the electric telescopic handle of corresponding position department respectively, two the other end of movable rod all rotates and is connected with reaming mechanism, run through on the drilling rod and be provided with water delivery device.
Preferably, the cleaning mechanism comprises a water tank fixedly connected to the upper end of the main control box, a water filling port is formed in the upper end of the water tank in a penetrating mode, a small water pump is fixedly connected to the upper end of the main control box, the input end of the small water pump extends into the water tank in a penetrating mode, a corrugated pipe is fixedly communicated with the output end of the small water pump, and a threaded connection pipe head is fixedly communicated with the other end of the corrugated pipe.
Preferably, the indicating device comprises an L-shaped rod fixedly connected to the side wall of the extension section of one electric telescopic rod, a strip-shaped groove is formed in the side wall of the main control box in a penetrating mode, the L-shaped rod slides in the strip-shaped groove, an indicating rod is fixedly connected to one end of the L-shaped rod, which is located outside the strip-shaped groove, and is parallel to the upper end of the main control box, a scale bar is arranged at the upper end of the main control box, and the indicating rod is located right above the scale bar.
Preferably, the rotating mechanism comprises a rotating rod fixedly connected to the tail end of an output shaft of the driving motor, the other end of the rotating rod is fixedly connected to one end of the drill rod located in the main control box, two rotating columns are sleeved on the side wall of the rotating rod, through grooves are formed in the rotating columns in a penetrating mode, clamping grooves are formed in the through grooves, limiting columns are arranged in the clamping grooves in a rotating mode, the limiting columns are fixedly connected to the rotating rod, the supporting columns are fixedly connected to the lower ends of the rotating columns, and the supporting columns are fixedly connected to the inner bottoms of the main control box.
Preferably, the guide device comprises a guide post fixedly connected to the side wall of the moving rod, the inner top of the side groove is provided with a guide groove corresponding to the position of the guide post in a penetrating way, and the guide post slides in the guide groove.
Preferably, the reaming mechanism comprises a rotating shaft which is rotationally connected to one end of a moving rod, a transmission rod is fixedly connected to the rotating shaft, a reaming alloy cutter is fixedly connected to one side, close to the outside of a side groove, of the transmission rod, a pulley is rotationally connected to one side, close to the inside of the side groove, of the transmission rod, a first inclined seat is fixedly connected to the side wall, close to the transmission rod, of the drill rod, a second inclined seat is fixedly connected to the inner wall, corresponding to the side groove, of the drill rod, and the first inclined seat and the second inclined seat form an inclined plane together, and the pulley can roll on the inclined plane.
Preferably, the water delivery device comprises a water delivery groove penetrating through the drill rod, one end of the water delivery groove penetrates through one end of the drill rod located outside the main control box, a threaded connection hole is formed in the side wall of the drill rod in a penetrating mode, the threaded connection port is communicated with the water delivery groove, and the threaded connection port corresponds to the threaded connection pipe head.
Preferably, two sliding grooves are formed in the outer side wall of the drill rod in a penetrating mode, sliding rods are fixedly connected to the side walls of the rotating shafts, the two sliding rods slide in the two sliding grooves respectively, and the two sliding rods are connected through a fixing rod.
The invention also provides an operation method of the deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device, which comprises the following steps:
s1, taking an anchor rod needing inner reaming and fixing the anchor rod on a clamp;
s2, inserting a drill rod in the device into an inner hole of the anchor rod;
s3, starting two electric telescopic rods through a control panel on the side wall of the main control box, driving the two moving rods to move forwards in side grooves at corresponding positions, and pushing the two transmission rods to move forwards until the two transmission rods are reversely unfolded by means of inclined planes of the two pulleys at the corresponding positions until the two reaming alloy cutters are completely unfolded to be propped against the inner walls of the inner holes of the anchor rods;
s4, starting a driving motor through a control panel, driving a drill rod to rotate through a rotating rod, and synchronously rotating the drill rod with two reaming alloy cutters at the side wings to cut an inner hole of the anchor rod;
s5, after the inner hole is enlarged, screwing the threaded connecting pipe head into the threaded connecting port, starting a small water pump through the control panel, injecting clean water in the water tank into the inner hole of the anchor rod through the water delivery groove by the small water pump, and blowing out scraps generated by cutting;
and S6, closing a power supply, and extracting the anchor rod from the drill rod.
The invention has the following beneficial effects;
1. by arranging the cleaning mechanism, a large amount of chips generated in the inner part can be cleaned by the cleaning mechanism after the inner reaming is finished, so that the inner part is prevented from being blocked, and the manufactured slurry column is prevented from being fragile during grouting;
2. through setting up indicating device, slewing mechanism, guider, reaming mechanism mutually support, utilize electric telescopic handle can drive two reaming alloy sword and be close to the inner wall of stock and carry out the interior reaming cutting of part, when needs cutting, only need through control panel start control motor can, overall structure is simple, convenient operation has reduced the operation threshold.
Drawings
FIG. 1 is a schematic structural view of a deep foundation pit supporting anchor rod in-hole reaming drill pipe mechanical device according to the present invention;
FIG. 2 is a cross-sectional view of a deep foundation pit supporting anchor rod in-hole reaming drill pipe mechanical device according to the present invention;
FIG. 3 is a schematic diagram of an indicating device of a deep foundation pit supporting anchor rod in-hole reaming drill pipe mechanical device according to the present invention;
FIG. 4 is a cross-sectional view of a rotary column of a deep foundation pit support anchor rod in-hole reaming drill pipe mechanical device according to the present invention;
fig. 5 is a schematic side view of a drill rod portion of a deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device according to the present invention.
In the figure: 1 control panel, 2 instruction pole, 3 scale bars, 4 master control case, 5 water filling port, 6 water tank, 7 miniature water pump, 8 bellows, 9 screwed connection tube head, 10 screwed connection mouth, 11 spout, 12 slide bar, 13 dead lever, 14 transfer line, 15 reaming alloy sword, 16 first inclined seat, 17 pulley, 18 drilling rod, 19 electric telescopic link, 20L type pole, 21 connecting rod, 22 arc piece, 23 dwang, 24 driving motor, 25 dwang, 26 dwang, 27 guide post, 28 pivot, 29 second inclined seat, 30 water delivery groove, 31 spacing post, 32 support column, 33 guide slot.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-5, a deep foundation pit supporting anchor rod hole reaming drill rod mechanical device comprises a main control box 4, a drill rod 18 is arranged at the side wall of the main control box 4 in a penetrating mode, a control panel 1 is fixedly connected to the side wall of the main control box 4, a cleaning mechanism is fixedly connected to the upper end of the main control box 4 and comprises a water tank 6 fixedly connected to the upper end of the main control box 4, a water filling port 5 is arranged at the upper end of the water tank 6 in a penetrating mode, a small water pump 7 is fixedly connected to the upper end of the main control box 4, an input end of the small water pump 7 extends into the water tank 6 in a penetrating mode, a corrugated pipe 8 is fixedly communicated to the output end of the small water pump 7, and a threaded connection pipe head 9 is fixedly communicated to the other end of the corrugated pipe 8.
Wherein, fixedly connected with two symmetrical electric telescopic handle 19 in position and driving motor 24 on the inner wall of master control case 4, fixedly connected with indicating device on the lateral wall of one of them electric telescopic handle 19, indicating device includes the L type pole 20 of fixed connection on one of them electric telescopic handle 19 extension lateral wall, run through on the lateral wall of master control case 4 and be provided with the bar groove, L type pole 20 slides in the bar inslot, the one end fixedly connected with pilot rod 2 that L type pole 20 is located outside the bar groove, pilot rod 2 is on a parallel with the upper end of master control case 4, the upper end of master control case 4 is provided with scale bar 3, pilot rod 2 is located directly over the scale bar 3.
Specifically, the output shaft end of the driving motor 24 and fixedly connected with rotating mechanism, the rotating mechanism includes the dead lever 23 of dead connection at the driving motor 24 output shaft end, the other end fixed connection of the rotating lever 23 is located the one end of master control case 4 at drilling rod 18, cover is equipped with two rotation posts 25 on the lateral wall of rotating lever 23, all run through on two rotation posts 25 and be provided with logical groove, all be provided with the draw-in groove in two logical grooves, all rotate in two draw-in grooves and be equipped with spacing post 31, two equal fixed connection of spacing post 31 are on the rotating lever 23, the equal fixedly connected with support column 32 of lower extreme of two rotation posts 25, the equal fixed connection of two support columns 32 is at the interior bottom of master control case 4.
Specifically, side grooves are formed in symmetrical side walls of the drill rod 18, movable rods 26 are arranged in the two side grooves, guiding devices are fixedly connected to the side walls of the two movable rods 26, each guiding device comprises a guiding column 27 fixedly connected to the side wall of the movable rod 26, a guiding groove 33 corresponding to the position of the guiding column 27 is formed in the inner top of each side groove in a penetrating mode, the guiding columns 27 slide in the guiding grooves 33, one ends of the two movable rods 26 are respectively connected with an electric telescopic rod 19 at the corresponding position through clamping devices, the other ends of the two movable rods 26 are respectively connected with a reaming mechanism in a rotating mode, each reaming mechanism comprises a rotating shaft 28 which is connected to one end of each movable rod 26 in a rotating mode, a driving rod 14 is fixedly connected to the rotating shaft 28, one side, close to the outside of the side grooves, of each driving rod 14 is fixedly connected with a reaming alloy cutter 15, one side, close to the inside of each driving rod 14, of the side grooves is fixedly connected with a pulley 17, a first inclined seat 16 is fixedly connected to the side wall, close to the driving rod 14, a second inclined seat 29 is fixedly connected to the inner wall of each side groove, one end, which corresponds to the corresponding position, of each first inclined seat 16 is respectively connected with an electric telescopic rod 19 through a clamping device, a reaming mechanism, a rotating shaft 28 is fixedly connected to the two inclined seats 12, and two sliding grooves 12 are fixedly connected to the two side walls 12 through the rotating shafts 12.
Specifically, the drill pipe 18 is provided with a water delivery device in a penetrating manner, the water delivery device comprises a water delivery groove 30 penetrating through the drill pipe 18, one end of the water delivery groove 30 penetrates through one end of the drill pipe 18 located outside the main control box 4, the side wall of the drill pipe 18 is provided with a threaded connection hole 10 in a penetrating manner, the threaded connection hole 10 is communicated with the water delivery groove 30, and the threaded connection hole 10 corresponds to the threaded connection pipe head 9.
The invention also provides an operation method of the deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device, which comprises the following steps:
s1, taking an anchor rod needing inner reaming and fixing the anchor rod on a clamp;
s2, inserting a drill rod 18 in the device into an inner hole of the anchor rod;
s3, starting two electric telescopic rods 19 through a control panel 1 on the side wall of the main control box 4, driving two moving rods 26 to move forwards in side grooves at corresponding positions, and pushing two transmission rods 14 to move forwards until the two transmission rods 14 are reversely unfolded by means of inclined planes of two pulleys 17 at corresponding positions until two reaming alloy cutters 15 are completely unfolded to be propped against the inner wall of an anchor rod inner hole;
s4, starting a driving motor 24 through the control panel 1, driving a drill rod 18 to rotate through a rotating rod 23, and synchronously rotating the drill rod 18 with two reaming alloy cutters 15 at the side wings to cut an inner hole of the anchor rod;
s5, after the inner hole is enlarged, screwing the threaded connecting pipe head 9 into the threaded connecting port 10, starting the small water pump 7 through the control panel 1, injecting clean water in the water tank 6 into the inner hole of the anchor rod through the water conveying groove 30 by the small water pump 7, and blowing out scraps generated by cutting;
s6, turning off the power supply and pulling out the anchor rod from the drill rod 18.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. The utility model provides a deep foundation pit supporting anchor rod becomes downthehole reaming drilling rod mechanical device, includes master control case (4), its characterized in that, the lateral wall department of master control case (4) runs through and is provided with drilling rod (18), fixedly connected with control panel (1) on the lateral wall of master control case (4), the upper end fixedly connected with cleaning mechanism of master control case (4), fixedly connected with two symmetrical electric telescopic handle (19) in position and driving motor (24) on the inner wall of master control case (4), one of them fixedly connected with indicating device on the lateral wall of electric telescopic handle (19), the output shaft end and the fixedly connected with rotary mechanism of driving motor (24), lateral wall department of drilling rod (18) upper symmetry all is provided with the side slot, and two all be provided with movable rod (26) in the side slot, two all fixedly connected with guider on the lateral wall of movable rod (26), two one end of movable rod (26) respectively with electric telescopic handle (19) of corresponding position department are connected through clamping device between two movable rod (26) are connected with each other, two other end (26) are connected with water delivery mechanism (6) on water tank (6) are provided with water tank (6) are connected with water delivery mechanism (6), the input end of the small water pump (7) extends into the water tank (6) in a penetrating way, the output end of the small water pump (7) is fixedly communicated with a corrugated pipe (8), and the other end of the corrugated pipe (8) is fixedly communicated with a threaded connecting pipe head (9);
the rotary mechanism comprises a rotary rod (23) fixedly connected to the tail end of an output shaft of a driving motor (24), the other end of the rotary rod (23) is fixedly connected to one end of a drill rod (18) located in a main control box (4), two rotary columns (25) are sleeved on the side wall of the rotary rod (23), through grooves are formed in the two rotary columns (25) in a penetrating mode, clamping grooves are formed in the two through grooves, limiting columns (31) are arranged in the two clamping grooves in a rotary mode, the limiting columns (31) are fixedly connected to the rotary rod (23), support columns (32) are fixedly connected to the lower ends of the two rotary columns (25), and the two support columns (32) are fixedly connected to the inner bottom of the main control box (4);
the guide device comprises a guide post (27) fixedly connected to the side wall of the movable rod (26), a guide groove (33) corresponding to the guide post (27) is arranged at the inner top of the side groove in a penetrating mode, and the guide post (27) slides in the guide groove (33);
the reaming mechanism comprises a rotating shaft (28) which is rotationally connected to one end of a moving rod (26), a transmission rod (14) is fixedly connected to the rotating shaft (28), a reaming alloy cutter (15) is fixedly connected to one side, close to the outside of a side groove, of the transmission rod (14), a pulley (17) is rotationally connected to one side, close to the inside of the side groove, of the transmission rod (14), a first inclined seat (16) is fixedly connected to the side wall, close to the transmission rod (14), of a drill rod (18), a second inclined seat (29) is fixedly connected to the inner wall, close to the corresponding position, of the side groove, the first inclined seat (16) and the second inclined seat (29) form an inclined plane together, and the pulley (17) can roll on the inclined plane;
the water delivery device comprises a water delivery groove (30) penetrating through a drill rod (18), one end of the water delivery groove (30) penetrates through one end of the drill rod (18) located outside the main control box (4), a threaded connection hole (10) is formed in the side wall of the drill rod (18) in a penetrating mode, the threaded connection hole (10) is communicated with the water delivery groove (30), and the threaded connection hole (10) corresponds to a threaded connection pipe head (9).
2. The deep foundation pit supporting anchor rod hole-forming reaming drill rod mechanical device according to claim 1, wherein the indicating device comprises an L-shaped rod (20) fixedly connected to the side wall of the extending section of one electric telescopic rod (19), a strip-shaped groove is formed in the side wall of the main control box (4) in a penetrating mode, the L-shaped rod (20) slides in the strip-shaped groove, one end of the L-shaped rod (20) located outside the strip-shaped groove is fixedly connected with an indicating rod (2), the indicating rod (2) is parallel to the upper end of the main control box (4), a scale bar (3) is arranged at the upper end of the main control box (4), and the indicating rod (2) is located right above the scale bar (3).
3. The mechanical device for reaming a drill pipe in a hole of a deep foundation pit supporting anchor rod according to claim 1, wherein two sliding grooves (11) are formed in the outer side wall of the drill pipe (18) in a penetrating mode, sliding rods (12) are fixedly connected to the side walls of two rotating shafts (28), the two sliding rods (12) slide in the two sliding grooves (11) respectively, and the two sliding rods (12) are connected through a fixing rod (13).
4. The method of operating a deep foundation pit support anchor rod in-hole reaming drill pipe mechanical device of claim 1, comprising the steps of:
s1, taking an anchor rod needing inner reaming and fixing the anchor rod on a clamp;
s2, inserting a drill rod (18) in the device into an inner hole of the anchor rod;
s3, starting two electric telescopic rods (19) through a control panel (1) on the side wall of the main control box (4), driving the two moving rods (26) to move forwards in side grooves at corresponding positions, pushing the two transmission rods (14) to move forwards until the two transmission rods (14) are reversely unfolded reversely by means of inclined planes of the two pulleys (17) at the corresponding positions until the two reaming alloy cutters (15) are completely unfolded to be propped against the inner wall of an inner hole of the anchor rod;
s4, starting a driving motor (24) through a control panel (1), driving a drill rod (18) to rotate through a rotating rod (23), and synchronously rotating the drill rod (18) with two reaming alloy cutters (15) at side wings to cut an inner hole of the anchor rod;
s5, after the inner hole is enlarged, screwing the threaded connection pipe head (9) into the threaded connection port (10), starting the small water pump (7) through the control panel (1), injecting clean water in the water tank (6) into the inner hole of the anchor rod through the water conveying groove (30) by the small water pump (7), and blowing out scraps generated by cutting;
s6, turning off the power supply and withdrawing the anchor rod from the drill rod (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309356.9A CN111618331B (en) | 2020-04-20 | 2020-04-20 | Deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010309356.9A CN111618331B (en) | 2020-04-20 | 2020-04-20 | Deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device and method |
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| CN111618331A CN111618331A (en) | 2020-09-04 |
| CN111618331B true CN111618331B (en) | 2023-06-16 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPO062296A0 (en) * | 1996-06-25 | 1996-07-18 | Gray, Ian | A system for directional control of drilling |
| US7493971B2 (en) * | 2003-05-08 | 2009-02-24 | Smith International, Inc. | Concentric expandable reamer and method |
| CN103046871B (en) * | 2012-12-30 | 2015-05-13 | 中北大学 | Hydra-mechanical reducing bit broaching while drilling |
| CN204075322U (en) * | 2014-08-15 | 2015-01-07 | 四川工程职业技术学院 | The boring cutter that a kind of aperture is adjustable |
| CN204827241U (en) * | 2015-01-05 | 2015-12-02 | 海瑞克股份公司 | A centering parts for $expanding pre -cast hole with drill bit that forms drilling with lay drill bit at back |
| CN206144466U (en) * | 2016-11-02 | 2017-05-03 | 中国电建集团成都勘测设计研究院有限公司 | Reamer |
| CN206693919U (en) * | 2017-03-22 | 2017-12-01 | 阳泉新宇岩土工程有限责任公司 | Drill hole of drilling machine reaming bit |
| CN110552348B (en) * | 2019-09-04 | 2023-04-07 | 刘晓理 | Pre-retracting type full-working-condition umbrella-shaped body expanding device and using method thereof |
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Effective date of registration: 20230524 Address after: 750000 Business Room 101, building 4, qingheyuan, Xingqing District, Yinchuan City, Ningxia Hui Autonomous Region Applicant after: NINGXIA HANGZHONG GEOTECHNICAL ENGINEERING Co.,Ltd. Address before: 210000 Nanjing University, 22 Hankou Road, Gulou District, Nanjing City, Jiangsu Province Applicant before: Wang Jianguo |
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