CN111197468B - Protective equipment for hydraulic engineering - Google Patents

Protective equipment for hydraulic engineering Download PDF

Info

Publication number
CN111197468B
CN111197468B CN202010056518.2A CN202010056518A CN111197468B CN 111197468 B CN111197468 B CN 111197468B CN 202010056518 A CN202010056518 A CN 202010056518A CN 111197468 B CN111197468 B CN 111197468B
Authority
CN
China
Prior art keywords
plate
rotating
lifting
fixed
screw rod
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.)
Active
Application number
CN202010056518.2A
Other languages
Chinese (zh)
Other versions
CN111197468A (en
Inventor
凌祯
魏屏
冯国建
周卫霞
叶腾飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunming University
Original Assignee
Kunming University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kunming University filed Critical Kunming University
Priority to CN202010056518.2A priority Critical patent/CN111197468B/en
Publication of CN111197468A publication Critical patent/CN111197468A/en
Application granted granted Critical
Publication of CN111197468B publication Critical patent/CN111197468B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B27/00Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0021Safety devices, e.g. for preventing small objects from falling into the borehole

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Centrifugal Separators (AREA)

Abstract

The invention discloses protective equipment for hydraulic engineering, which comprises a lower supporting rod; the lower support rods are fixed beside the well in a surrounding manner; the device also comprises a bottom plate, a lifting rotating mechanism and a dredging mechanism; the upper ends of the lower supporting rods are detachably connected with a bottom plate; the bottom plate is provided with a lifting rotating mechanism; and a dredging mechanism is arranged at the bottom of the lifting rotating mechanism. The protective equipment for the hydraulic engineering can improve the dredging efficiency of the shaft bottom and prevent workers from being injured by arranging the dredging mechanism; through setting up the lift slewing mechanism, can control the desilting mechanism limit and rotate the limit and go up and down to the desilting mechanism that can be convenient for enters into the silt bottom, thereby further improves desilting efficiency.

Description

Protective equipment for hydraulic engineering
Technical Field
The invention relates to the field of hydraulic engineering, in particular to protective equipment for hydraulic engineering.
Background
In the field of underwater engineering, drilling is often needed, and after drilling, dredging needs to be carried out on the bottom of a well to remove redundant mud. The manual dredging device is adopted mostly for most of the existing dredging devices, the earth is transported away after workers reach the well bottom, the protective device is required to be arranged outside the well in the dredging process of the workers, and external stones and the like are prevented from falling to the well bottom to cause injury to the workers.
The manual dredging is adopted, so that the efficiency is low, time and labor are wasted, and therefore, protective equipment capable of cleaning sludge at the bottom of a well needs to be designed to replace manual dredging.
Disclosure of Invention
The invention aims to provide protective equipment for hydraulic engineering, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a protective device for hydraulic engineering comprises a lower support rod; the lower support rods are fixed beside the well in a surrounding manner; the device also comprises a bottom plate, a lifting rotating mechanism and a dredging mechanism; the upper ends of the lower supporting rods are detachably connected with a bottom plate; the bottom plate is provided with a lifting rotating mechanism; and a dredging mechanism is arranged at the bottom of the lifting rotating mechanism.
As a further scheme of the invention: the dredging mechanism comprises a driving box, a fixed plate and a rotating mechanism; the driving box is fixed on the fixing plate, and a driving mechanism for controlling the rotation mechanism to work is arranged in the driving box; the plurality of rotating mechanisms are annularly arranged on the outer side of the fixed plate, and each rotating mechanism comprises an outer baffle, an inner rotating plate, a threaded screw rod and a movable sleeve; the outer baffles are annularly arranged on the outer side of the fixing plate, and threaded screw rods are rotatably arranged in the fixing plate and the outer baffles; the threaded screw rod is provided with a threaded chute; the movable sleeve matched with the thread sliding chute on the thread screw rod is arranged in the outer baffle in a sliding manner; the upper end and the lower end of the outer baffle are internally provided with an inner rotating plate in a sliding and rotating manner; one end of the inner rotating plate, which is close to the fixed plate, is rotatably arranged in the fixed plate, and the movable sleeve is arranged between the two rotating plates in a fitting and sliding manner; two one side that the rotor plate is close to each other all is equipped with the sliding tray, and the upper and lower both ends of activity sleeve slide respectively and set up in the sliding tray.
As a still further scheme of the invention: the driving mechanism comprises a driven bevel gear, a driving bevel gear and a locking motor; the driven bevel gear is rotatably arranged in the fixed plate and is fixed at one end of the threaded screw rod close to one side of the fixed plate; a driving bevel gear meshed with the driven bevel gear is arranged at the rotating end of the locking motor; the locking motor is fixed in the driving box.
As a still further scheme of the invention: the lifting rotating mechanism comprises a lifting motor, a lifting rod, a coupler and a rotating screw rod; a plurality of upper supporting rods are fixed at the upper end of the bottom plate; a top plate is fixed at the upper end of each upper supporting rod; a lifting motor is fixed at the bottom of the top plate; the rotating end of the lifting motor is connected with a rotating screw rod through a coupler; the rotary screw rod is provided with a thread chute and is arranged in the lifting rod in a rotary and sliding manner; a sliding block matched with the threaded sliding groove in the rotary screw rod is fixed in the lifting rod, and the lifting rod penetrates through the bottom plate in a sliding manner; the outer side of the lifting rod is also provided with a threaded sliding groove, and the lifting rod is in threaded fit with the part of the bottom plate in contact; the bottom end of the lifting rod is fixed with the upper end of the driving box.
As a still further scheme of the invention: one side of the inner rotating plate, which is far away from the outer baffle, is designed to be in a sharp cone shape.
As a still further scheme of the invention: the area of the part of the two inner rotating plates, which extends out of the outer baffle plates, is larger than the area between the two outer baffle plates.
As a still further scheme of the invention: and a control device for controlling the operation of the descending motor and the locking motor is also arranged on one side of the bottom plate.
Compared with the prior art, the invention has the beneficial effects that: by arranging the dredging mechanism, the dredging efficiency of the well bottom can be improved, and the harm to workers can be prevented; through setting up the lift slewing mechanism, can control the desilting mechanism limit and rotate the limit and go up and down to the desilting mechanism that can be convenient for enters into the silt bottom, thereby further improves desilting efficiency.
Drawings
Fig. 1 is a schematic structural diagram of protective equipment for hydraulic engineering.
Fig. 2 is a schematic structural diagram of a dredging mechanism in the protective equipment for hydraulic engineering.
Fig. 3 is an internal structure schematic diagram of a dredging mechanism in the protective equipment for hydraulic engineering.
Fig. 4 is a schematic structural diagram of a driving mechanism in the protective equipment for hydraulic engineering.
In the figure: 1-bottom plate, 2-lower support bar, 3-upper support bar, 4-lifting motor, 5-lifting bar, 6-driving box, 7-fixing plate, 8-outer baffle, 9-inner rotating plate, 10-threaded screw rod, 11-movable sleeve, 12-driven bevel gear, 13-driving bevel gear, 14-locking motor, 15-coupler and 16-rotating screw rod.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
Referring to fig. 1-4, the embodiment provides a protective device for hydraulic engineering, which includes a lower support rod 2; a plurality of lower support rods 2 are fixed around the well; the device also comprises a bottom plate 1, a lifting rotating mechanism and a dredging mechanism; the upper ends of the lower support rods 2 are detachably connected with a bottom plate 1; the bottom plate 1 is provided with a lifting rotating mechanism; the bottom of the lifting rotating mechanism is provided with a dredging mechanism; set up like this, after fixing bottom plate 1 on a plurality of lower support rods 2, the rotatory limit of elevating and rotating mechanism control desilting mechanism descends until desilting mechanism arrives the shaft bottom, and desilting mechanism begins to collect the silt in shaft bottom this moment, and later elevating and rotating mechanism reversal, the rotatory limit of control desilting mechanism goes up and down to can clear away the silt in shaft bottom.
The dredging mechanism comprises a driving box 6, a fixed plate 7 and a rotating mechanism; the driving box 6 is fixed on the fixing plate 7, and a driving mechanism for controlling the rotation mechanism to work is arranged in the driving box 6; the plurality of rotating mechanisms are annularly arranged on the outer side of the fixed plate 7 and comprise outer baffles 8, inner rotating plates 9, threaded lead screws 10 and movable sleeves 11; the outer baffles 8 are annularly arranged on the outer side of the fixing plate 7, and threaded screw rods 10 are rotatably arranged in the fixing plate 7 and the outer baffles 8; the threaded screw rod 10 is provided with a threaded sliding groove; a movable sleeve 11 matched with the thread sliding groove on the thread screw rod 10 is arranged in the outer baffle 8 in a sliding manner; the upper end and the lower end of the outer baffle 8 are internally provided with an inner rotating plate 9 in a sliding and rotating way; one end of the inner rotating plate 9 close to the fixed plate 7 is rotatably arranged in the fixed plate 7, and the movable sleeve 11 is arranged between the two rotating plates 9 in a fitting and sliding manner; sliding grooves are formed in the mutually close sides of the two rotating plates 9, and the upper end and the lower end of the movable sleeve 11 are arranged in the sliding grooves in a sliding mode respectively; with the arrangement, when the driving mechanism drives the threaded screw rod 10 to rotate, the movable sleeve 11 cannot rotate, and the movable sleeve 11 moves inwards at the moment, so that the two inner rotating plates 9 are pushed to rotate outwards, the space between two adjacent outer baffles 8 is filled with the rotating plates 9, the rotating plates 9 and the outer baffles 8 form sealing baffles, and sludge attached to the outer baffles 8 and the rotating plates 9 can be taken out at the moment.
The driving mechanism comprises a driven bevel gear 12, a driving bevel gear 13 and a locking motor 14; the driven bevel gear 12 is rotatably arranged in the fixed plate 7 and is fixed at one end of the threaded screw rod 10 close to one side of the fixed plate 7; a driving bevel gear 13 meshed with the driven bevel gear 12 is arranged at the rotating end of a locking motor 14; the locking motor 14 is fixed in the driving box 6; so configured, when the locking motor 14 works, the driving bevel gear 13 is driven to rotate, and the driven bevel gear 12 is driven to rotate, so as to drive the threaded screw 10 to rotate.
The lifting rotating mechanism comprises a lifting motor 4, a lifting rod 5, a coupler 15 and a rotating screw rod 16; a plurality of upper supporting rods 3 are fixed at the upper end of the bottom plate 1; a top plate is fixed at the upper ends of the upper supporting rods 3; a lifting motor 4 is fixed at the bottom of the top plate; the rotating end of the lifting motor 4 is connected with a rotating screw rod 16 through a coupling 15; the rotary screw rod 16 is provided with a thread chute, and the rotary screw rod 16 is rotationally and slidably arranged in the lifting rod 5; a sliding block matched with the threaded sliding groove on the rotary screw rod 16 is fixed in the lifting rod 5, and the lifting rod 5 penetrates through the bottom plate 1 in a sliding manner; the outer side of the lifting rod 5 is also provided with a threaded sliding groove, and the part of the lifting rod 5, which is contacted with the bottom plate 1, is in threaded fit; the bottom end of the lifting rod 5 is fixed with the upper end of the driving box 6; with the arrangement, when the lifting motor 4 works, the rotary screw rod 16 is driven to rotate, and the lifting rod 5 is driven to rotate and descend simultaneously due to the threaded fit between the lifting rod 5 and the bottom plate 1, so that the driving box 6 is driven to rotate and descend simultaneously.
In order to facilitate the sludge cutting, the side of the inner rotating plate 9, which is far away from the outer baffle 8, is provided with a sharp cone shape, and the sludge cutting by the inner rotating plate 9 is facilitated.
In order to facilitate the sealing of the space between two outer baffle plates 8 connected by the inner rotating plate 9, the area of the part of the two inner rotating plates 9 extending out of the outer baffle plates 8 is larger than the area between the two outer baffle plates 8. By the arrangement, the sludge can be conveniently transported.
The working principle of the embodiment is as follows: after the bottom plate 1 is fixed on the lower support rods 2, the lifting rotating mechanism controls the dredging mechanism to rotate and descend at the same time until the dredging mechanism reaches the bottom of the well, the dredging mechanism starts to collect sludge at the bottom of the well at the moment, then the lifting rotating mechanism rotates reversely, and controls the dredging mechanism to rotate and ascend at the same time, so that the sludge at the bottom of the well can be removed.
When the locking motor 14 works, the driving bevel gear 13 is driven to rotate, so that the driven bevel gear 12 is driven to rotate, the threaded screw rod 10 is driven to rotate, the movable sleeve 11 cannot rotate, the movable sleeve 11 moves inwards at the moment, so that the two inner rotating plates 9 are pushed to rotate outwards, the space between every two adjacent outer baffles 8 is filled by the rotating plates 9, the rotating plates 9 and the outer baffles 8 form sealing baffles, and sludge attached to the outer baffles 8 and the rotating plates 9 can be taken out at the moment. When the lifting motor 4 works, the rotating screw rod 16 is driven to rotate, and the lifting rod 5 is driven to rotate and descend simultaneously due to the threaded fit between the lifting rod 5 and the bottom plate 1, so that the driving box 6 is driven to rotate and descend simultaneously.
Example 2
The embodiment is further improved on the basis of the embodiment 1, and the improvement is as follows: in order to control the operation of the lifting motor 4 and the locking motor 14, a control device for controlling the operation of the lifting motor 4 and the locking motor 14 is further arranged on one side of the bottom plate 1.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (6)

1. A protective device for hydraulic engineering comprises a lower support rod (2); the lower support rods (2) are fixed beside the well in a surrounding manner; it is characterized by also comprising a bottom plate (1), a lifting rotating mechanism and a dredging mechanism; the upper ends of the lower support rods (2) are detachably connected with a bottom plate (1); the bottom plate (1) is provided with a lifting rotating mechanism; the bottom of the lifting rotating mechanism is provided with a dredging mechanism;
the dredging mechanism comprises a driving box (6), a fixed plate (7) and a rotating mechanism; the driving box (6) is fixed on the fixing plate (7), and a driving mechanism for controlling the rotation mechanism to work is arranged in the driving box (6); the plurality of rotating mechanisms are annularly arranged on the outer side of the fixed plate (7), and each rotating mechanism comprises an outer baffle (8), an inner rotating plate (9), a threaded screw rod (10) and a movable sleeve (11); the outer baffles (8) are annularly arranged on the outer side of the fixing plate (7), and threaded screw rods (10) are rotatably arranged in the fixing plate (7) and the outer baffles (8); the threaded screw rod (10) is provided with a threaded sliding groove; a movable sleeve (11) matched with the thread sliding groove on the thread screw rod (10) is arranged in the outer baffle (8) in a sliding way; the upper end and the lower end of the outer baffle (8) are internally provided with an inner rotating plate (9) in a sliding and rotating way; one end of the inner rotating plate (9) close to the fixed plate (7) is rotatably arranged in the fixed plate (7), and the movable sleeve (11) is arranged between the two inner rotating plates (9) in a fit and sliding manner; two one sides that interior rotor plate (9) are close to each other all are equipped with the sliding tray, and the upper and lower both ends of activity sleeve (11) slide respectively and set up in the sliding tray.
2. The hydraulic engineering protection device according to claim 1, wherein the driving mechanism comprises a driven bevel gear (12), a driving bevel gear (13) and a locking motor (14); the driven bevel gear (12) is rotatably arranged in the fixed plate (7) and is fixed at one end of the threaded screw rod (10) close to one side of the fixed plate (7); a driving bevel gear (13) meshed with the driven bevel gear (12) is arranged at the rotating end of a locking motor (14); the locking motor (14) is fixed in the driving box (6).
3. The protective equipment for the hydraulic engineering is characterized in that the lifting rotating mechanism comprises a lifting motor (4), a lifting rod (5), a coupler (15) and a rotating screw rod (16); a plurality of upper supporting rods (3) are fixed at the upper end of the bottom plate (1); a top plate is fixed at the upper end of each upper supporting rod (3); a lifting motor (4) is fixed at the bottom of the top plate; the rotating end of the lifting motor (4) is connected with a rotating screw rod (16) through a coupling (15); the rotary screw rod (16) is provided with a thread chute, and the rotary screw rod (16) is rotationally and slidably arranged in the lifting rod (5); a sliding block matched with the threaded sliding groove on the rotary screw rod (16) is fixed in the lifting rod (5), and the lifting rod (5) penetrates through the bottom plate (1) in a sliding manner; the outer side of the lifting rod (5) is also provided with a threaded sliding groove, and the lifting rod (5) is in threaded fit with the part contacted with the bottom plate (1); the bottom end of the lifting rod (5) is fixed with the upper end of the driving box (6).
4. The hydraulic engineering protection device according to claim 1, wherein one side of the inner rotating plate (9) far away from the outer baffle (8) is provided with a sharp cone shape.
5. The hydraulic-engineering protection device according to claim 1, wherein the area of the part of the two inner rotating plates (9) extending outside the outer fenders (8) is larger than the area between the two outer fenders (8).
6. The protective equipment for the water conservancy project is characterized in that a control device for controlling the operation of the lifting motor (4) and the locking motor (14) is further arranged on one side of the bottom plate (1).
CN202010056518.2A 2020-01-18 2020-01-18 Protective equipment for hydraulic engineering Active CN111197468B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010056518.2A CN111197468B (en) 2020-01-18 2020-01-18 Protective equipment for hydraulic engineering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010056518.2A CN111197468B (en) 2020-01-18 2020-01-18 Protective equipment for hydraulic engineering

Publications (2)

Publication Number Publication Date
CN111197468A CN111197468A (en) 2020-05-26
CN111197468B true CN111197468B (en) 2021-10-19

Family

ID=70744805

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010056518.2A Active CN111197468B (en) 2020-01-18 2020-01-18 Protective equipment for hydraulic engineering

Country Status (1)

Country Link
CN (1) CN111197468B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111472721B (en) * 2020-06-02 2022-05-27 平顶山天安煤业股份有限公司十矿 Dredging equipment for preventing and treating water damage of mine
CN114484209B (en) * 2021-11-04 2023-07-25 昆明学院 Ecological display device for hydraulic engineering
CN114151035B (en) * 2021-12-06 2023-02-28 山东省国土空间生态修复中心 Vacuum negative pressure well washing equipment and use method thereof
CN116180833A (en) * 2023-03-15 2023-05-30 威海水利工程集团有限公司 River engineering dredging device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2904422A1 (en) * 1978-07-12 1980-02-28 Vni Ex K I Kommunalnogo Mash SLUDGE REMOVAL DEVICE
CN106522356A (en) * 2016-12-11 2017-03-22 南昌安润科技有限公司 Special dredging vehicle for sewer man-hole
CN206220153U (en) * 2016-12-03 2017-06-06 李荣东 A kind of hydraulic engineering Accrete clearing device
CN207988008U (en) * 2018-01-29 2018-10-19 骆连强 A kind of hydraulic engineering Accrete clearing device
CN209040194U (en) * 2018-11-14 2019-06-28 刘田华 A kind of Accrete clearing device for hydraulic engineering
CN209260803U (en) * 2018-12-07 2019-08-16 湖南省金科建设有限公司 A kind of water conservancy water channel desilting equipment
CN110295636A (en) * 2019-07-16 2019-10-01 大唐东营发电有限公司 A kind of thermal power plant's cooling tower pond mud cleaning equipment

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2904422A1 (en) * 1978-07-12 1980-02-28 Vni Ex K I Kommunalnogo Mash SLUDGE REMOVAL DEVICE
CN206220153U (en) * 2016-12-03 2017-06-06 李荣东 A kind of hydraulic engineering Accrete clearing device
CN106522356A (en) * 2016-12-11 2017-03-22 南昌安润科技有限公司 Special dredging vehicle for sewer man-hole
CN207988008U (en) * 2018-01-29 2018-10-19 骆连强 A kind of hydraulic engineering Accrete clearing device
CN209040194U (en) * 2018-11-14 2019-06-28 刘田华 A kind of Accrete clearing device for hydraulic engineering
CN209260803U (en) * 2018-12-07 2019-08-16 湖南省金科建设有限公司 A kind of water conservancy water channel desilting equipment
CN110295636A (en) * 2019-07-16 2019-10-01 大唐东营发电有限公司 A kind of thermal power plant's cooling tower pond mud cleaning equipment

Also Published As

Publication number Publication date
CN111197468A (en) 2020-05-26

Similar Documents

Publication Publication Date Title
CN111197468B (en) Protective equipment for hydraulic engineering
CN213980625U (en) Piling device for construction engineering
CN107288171B (en) Bore and prop integral type shaft pore-forming device
RU2576749C2 (en) Device for drilling hoses storage and automatic handling and appropriate drilling rig
CN104084571A (en) Ladle cleaning device and method
CN211448690U (en) Working platform for shield tunnel segment removal
CN115012827B (en) Pile foundation well reaming device
CN210460485U (en) Underground retaining wall stirring drilling machine and pile machine equipment
CN108798506B (en) Small-size stake machine of low formula
CN114733817B (en) Sweeps clearance mechanism of civil engineering building drilling equipment
CN217299719U (en) Hydraulic engineering construction is with removing movable support
CN114263181B (en) Main bridge pile foundation concrete super-casting height accurate control device and use method thereof
CN212793153U (en) Positioner is used in power takeoff spare part processing
CN212454271U (en) Civil engineering construction foundation pile drilling equipment
CN114718565A (en) Coal mine drilling machine with automatic full hydraulic manipulator
CN214576742U (en) Piling equipment for oil exploitation
CN206233876U (en) Oil drilling machine quadruple board platform pipe arranging robot slew gear
CN215927280U (en) Sleeve pipe construction equipment
CN216041212U (en) Hydraulic engineering protector
CN117307025B (en) Layering sampling drilling machine for reconnaissance
CN215630273U (en) Mud removing equipment convenient to multi-angle is adjusted for hydraulic engineering
CN216242112U (en) Four-power reverse circulation drilling machine speed reducer convenient to lift
CN221322343U (en) Auxiliary device is salvaged to rig head
CN217760973U (en) Coal mine drilling machine with automatic full hydraulic manipulator
CN220849604U (en) Tunnel engineering construction drilling equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant