CN108726391B - Hoisting device and hoisting method for hydraulic engineering equipment - Google Patents
Hoisting device and hoisting method for hydraulic engineering equipment Download PDFInfo
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- CN108726391B CN108726391B CN201810929583.4A CN201810929583A CN108726391B CN 108726391 B CN108726391 B CN 108726391B CN 201810929583 A CN201810929583 A CN 201810929583A CN 108726391 B CN108726391 B CN 108726391B
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- hoisting
- hydraulic engineering
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000008602 contraction Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/04—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs the effective length of which is variable in operation, e.g. longitudinally displaceable, extensible
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/12—Driving gear incorporating electric motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/14—Power transmissions between power sources and drums or barrels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention discloses a hoisting device and a hoisting method of hydraulic engineering equipment, the device comprises a base and a placing plate, the upper end of the base is provided with an upright post, a first cavity is arranged in the upright post, a second cavity is arranged in the base, a motor is arranged in the second cavity, the output end of the motor is provided with a rotating shaft, a driving bevel gear is arranged on the rotating shaft, the left side of the upper end of the driving bevel gear is provided with a driven bevel gear meshed with the driving bevel gear, the upper end of the driven bevel gear is provided with a screw rod, the device can slide in the first chute through a first slide block according to the size of the equipment, so that a second cross rod is driven by a support column to move, the first cross rod and the second cross rod are driven by the support column to move to the side of the equipment through the sliding of a second slide block, the support column is fixed through a first threaded, therefore, the equipment is fixed, the device is suitable for equipment with different sizes, and the device is prevented from moving in the hoisting process.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering, in particular to a hoisting device and a hoisting method for hydraulic engineering equipment.
Background
Most of equipment is designed to be installed at the top, enough hoisting space is reserved at the upper part, and hoisting machinery can be conveniently utilized to hoist in place after being connected through a steel wire rope during equipment installation. However, in a complicated structure, a shielding body may be present in an upper space of an installation site or the equipment may be installed on an inverted surface, and the equipment cannot be directly lifted into place by the lifting equipment. Generally, for such hoisting, two options are available, one of which is: the proper position of the upper part of the installation part is symmetrically preset with an anchor hook, the lower part of the anchor hook is hung with a pulley, and a steel wire rope bypasses the pulley and is respectively connected with a hoisting device and an installation device, thereby achieving the purpose of hoisting and installation. The second step is as follows: and a hoisting hole is reserved, secondary construction is carried out after installation is finished, and the hoisting hole is closed.
Patent application No. CN201510207155.7 discloses a hoisting device and a hoisting method for engineering equipment. The device comprises a balance hanging beam and a lifting device, wherein at least two lifting lugs are symmetrically arranged on the balance hanging beam and are connected with the lifting device through a steel wire rope, a mounting seat used for fixing engineering equipment is fixedly arranged at one end of the balance hanging beam, and a balancing weight used for keeping the balance of the balance hanging beam is slidably arranged at the other end of the balance hanging beam. The method for hoisting by using the device comprises the following steps: s1: carrying out balance debugging on the hoisting device in an empty load state; s2: carrying out balance debugging on the hoisting device in the state of loading the engineering equipment; s3: hoisting; s4: mounting; s5: and (5) hoisting away. The hoisting device and the hoisting method have the advantages of simple structure, convenience in operation, capability of greatly shortening the construction period and reducing the construction cost. However, the hoisting device cannot fix the equipment when the equipment is placed on the balance hanging beam, so that the equipment is easy to shake, the use of the equipment with different sizes cannot be met, and the practicability is not high.
Therefore, a hoisting device and a hoisting method for hydraulic engineering equipment are provided.
Disclosure of Invention
The invention aims to provide a hoisting device and a hoisting method for hydraulic engineering equipment, which aim to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a hoisting device of hydraulic engineering equipment comprises a base and a placing plate, wherein the upper end of the base is provided with an upright post, a first cavity is arranged in the upright post, a second cavity is arranged in the base, a motor is arranged in the second cavity, the output end of the motor is provided with a rotating shaft, a driving bevel gear is arranged on the rotating shaft, a driven bevel gear meshed with the driving bevel gear is arranged on the left side of the upper end of the driving bevel gear, a screw rod is arranged at the upper end of the driven bevel gear and extends into the first cavity, the upper end and the lower end of the screw rod are connected with the upper side wall and the lower side wall of the upright post through bearings, a third chute is arranged on the right side surface of the upright post, a moving block is arranged on the screw rod and is connected in the third chute in a sliding manner, the right side of the moving block is connected with, the output of first pneumatic cylinder all is equipped with the piston rod, the top of piston rod is connected in the bottom of connecting rod, it is equipped with the lug to place board upper end both sides, be equipped with the lifting rope on the lug, four groups the lifting rope all is connected on the rings that are used for articulating the couple, it is equipped with the support column to place board upper end four corners and be located the inboard of lug, both sides all are equipped with first horizontal pole around the support column, first horizontal pole inboard is equipped with first spout, the support column inboard is equipped with the first slider that is used for the first spout of sliding joint, the upper end left and right sides of support column all is equipped with the second horizontal pole, the bottom of second horizontal pole is equipped with the second spout, the upper end of support column is equipped with the second slider that is used.
Preferably, the inner side of the supporting column is provided with a locking bolt at the position of the first sliding block, the width of the second sliding block is larger than that of the supporting column, and the second sliding block is provided with the locking bolt.
Preferably, the four corners of the bottom of the base are provided with second hydraulic cylinders, the bottom of the output end of each second hydraulic cylinder is provided with a fixing plate, and the bottom of the base is provided with universal wheels.
Preferably, the inner side surfaces of the first cross bar and the second cross bar are provided with rubber cushions.
Preferably, the first hydraulic cylinder is connected to the stand column through a hinged seat, and piston rods of output ends of the first hydraulic cylinder and the second hydraulic cylinder are connected to the bottom of the connecting rod through hinged seats.
Preferably, the bottom of support column is equipped with the mounting panel, be equipped with first screw hole on the mounting panel, it has the second screw hole to place evenly distributed on the board.
The invention also provides a hoisting method of the hoisting device of the hydraulic engineering equipment, which comprises the following steps:
s1, placing the equipment in the middle of the upper end of the placing plate, moving the supporting column according to the size and the position of the equipment so as to drive the first cross rod and the second cross rod to move, fixing the equipment by the first cross rod and the second cross rod, and fixing the supporting column by passing a screw through the first threaded hole and the second threaded hole;
s2, hanging the hanging ring on the hook, starting the motor, driving the screw rod to rotate, so that the moving block moves upwards, and finally driving the hook to lift the placing plate and the equipment on the placing plate;
s3, adjusting the angle of the connecting rod through the expansion and contraction of the piston rod at the output end of the first hydraulic cylinder, so that the position of the hook is adjusted, and finally the position of the placing plate and the equipment is adjusted.
Compared with the prior art, the invention has the beneficial effects that: according to the size of the equipment, the first sliding block slides in the first sliding groove, so that the supporting column drives the second cross rod to move, the second sliding block slides in the second sliding groove, the supporting column drives the first cross rod to move, the first cross rod and the second cross rod are moved to the side of the equipment, and the supporting column is fixed through the first threaded hole and the second threaded hole by the aid of screws, so that the equipment is fixed, the equipment is suitable for equipment with different sizes, and the situation that the placing plate is inclined due to the fact that the equipment slides down to be damaged due to the fact that the equipment moves in the lifting process is prevented;
hanging a lifting ring on a hook, starting a motor to drive a rotating shaft and a driving bevel gear to rotate, so as to drive a driven bevel gear and a screw rod to rotate, so that a moving block moves upwards to drive a connecting rod and the hook to lift a placing plate and equipment on the placing plate;
through the flexible of first pneumatic cylinder and second pneumatic cylinder output end piston rod, the angle of adjusting the connecting rod to the position of regulation couple, the final position of placing board and equipment of adjusting makes the hoist and mount position more accurate.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the connection structure of the motor and the screw rod of the present invention;
FIG. 3 is a schematic front sectional view of the placement board according to the present invention;
FIG. 4 is a schematic left sectional view of the present invention.
In the figure: the lifting device comprises a base 1, a column 2, a first cavity 3, a second cavity 4, a motor 5, a rotating shaft 6, a driving bevel gear 7, a driven bevel gear 8, a screw rod 9, a third sliding groove 10, a moving block 11, a hinged seat 12, a connecting rod 13, a steel wire rope 14, a hook 15, a first hydraulic cylinder 16, a threaded hole 17, a piston rod 18, a placing plate 19, a lifting lug 20, a lifting rope 21, a lifting ring 22, a supporting column 23, a first cross rod 24, a first sliding groove 25, a first sliding block 26, a second cross rod 27, a second sliding groove 28, a second sliding block 29, a locking bolt 30, a second hydraulic cylinder 31, a fixing plate 32, a universal wheel 33, a first threaded hole 34 and a mounting plate 35.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a hoisting device of hydraulic engineering equipment comprises a base 1 and a placing plate 19, wherein an upright column 2 is arranged at the upper end of the base 1, a first cavity 3 is arranged in the upright column 2, a second cavity 4 is arranged in the base 1, a motor 5 is arranged in the second cavity 4, a rotating shaft 6 is arranged at the output end of the motor 5, a driving bevel gear 7 is arranged on the rotating shaft 6, a driven bevel gear 8 meshed with the driving bevel gear 7 is arranged on the left side of the upper end of the driving bevel gear 7, a screw rod 9 is arranged at the upper end of the driven bevel gear 8, the screw rod 9 extends into the first cavity 3, the upper end and the lower end of the screw rod 9 are connected with the upper side wall and the lower side wall of the upright column 2 through bearings, a third chute 10 is arranged on the right side surface of the upright column 2, a moving block 11 is arranged on the screw rod 9, the, the right side of the connecting rod 13 is provided with a steel wire rope 14, the lower end of the steel wire rope 14 is provided with a hook 15, the front end and the rear end of the right side of the upright post 2 are respectively provided with a first hydraulic cylinder 16, the output end of each first hydraulic cylinder 16 is provided with a piston rod 18, the top of each piston rod 18 is connected with the bottom of the connecting rod 13, two sides of the upper end of the placing plate 19 are provided with lifting lugs 20, each lifting lug 20 is provided with a lifting rope 21, four groups of lifting ropes 21 are connected with a lifting ring 22 for hanging the hook 15, four corners of the upper end of the placing plate 19 are provided with supporting columns 23 positioned at the inner sides of the lifting lugs 20, the front side and the rear side of each supporting column 23 are provided with first cross rods 24, the inner sides of the first cross rods 24 are provided with first sliding grooves 25, the inner sides of the supporting columns 23 are provided with first sliding blocks 26 for, the upper end of the supporting column 23 is provided with a second sliding block 29 for sliding connection with the second sliding chute 28.
Specifically, a locking bolt 30 is arranged on the inner side of the supporting column 23 and at the position of the first sliding block 26, the width of the second sliding block 29 is greater than that of the supporting column 23, and the locking bolt 30 is arranged on the second sliding block 29.
Specifically, base 1 bottom four corners all is equipped with second pneumatic cylinder 31, the bottom of second pneumatic cylinder 31 output is equipped with fixed plate 32, base 1 bottom is equipped with universal wheel 33.
Specifically, the inner side surfaces of the first cross bar 24 and the second cross bar 27 are provided with rubber cushions.
Specifically, the first hydraulic cylinder 16 is connected to the upright 2 through the hinge base 12, and the piston rod 18 at the output end of the first hydraulic cylinder 16 is connected to the bottom of the connecting rod 13 through the hinge base 12.
Specifically, the bottom of support column 23 is equipped with mounting panel 35, be equipped with first screw hole 34 on the mounting panel 35, it has second screw hole 17 to place evenly distributed on the board 19.
The invention also provides a hoisting method of the hoisting device of the hydraulic engineering equipment, which comprises the following steps:
s1, placing the equipment in the middle of the upper end of the placing plate 19, moving the supporting column 23 according to the size and the position of the equipment so as to drive the first cross rod 24 and the second cross rod 27 to move, enabling the first cross rod 24 and the second cross rod 27 to fix the equipment, and then fixing the supporting column 23 by passing a screw through the first threaded hole 34 and the second threaded hole 37;
s2, hanging the hanging ring 22 on the hook 15, starting the motor 5, driving the screw rod 9 to rotate, so that the moving block 11 moves upwards, and finally driving the hook 15 to lift the placing plate 19 and the equipment on the placing plate 19;
and S3, adjusting the angle of the connecting rod 13 through the expansion and contraction of the piston rod at the output end of the first hydraulic cylinder 16, so as to adjust the position of the hook 15 and finally adjust the position of the placing plate 19 and the equipment.
In summary, compared with the prior art, according to the size of the equipment, the first sliding block 26 slides in the first sliding groove 25, so that the supporting column 23 drives the second cross rod 27 to move, the second sliding block 29 slides in the second sliding groove 28, so that the supporting column 23 drives the first cross rod 24 to move, the first cross rod 24 and the second cross rod 27 are moved to the side of the equipment, the supporting column 23 is fixed by passing a screw through the first threaded hole 34 and the second threaded hole 17, so that the equipment is fixed, the situation that the placing plate 19 is inclined to cause the equipment to slide and damage due to the fact that the equipment moves in the hoisting process is prevented;
hanging the hanging ring 22 on the hook 15, starting the motor 5 to drive the rotating shaft 6 and the driving bevel gear 7 to rotate, so as to drive the driven bevel gear 8 and the screw rod 9 to rotate, so that the moving block 11 moves upwards, and the connecting rod 13 and the hook 15 are driven to lift the placing plate 19 and the equipment on the placing plate 19;
through the flexible of first pneumatic cylinder 16 and second pneumatic cylinder 17 output end piston rod, the angle of adjusting connecting rod 13 to adjust the position of couple 15, finally adjust the position of placing board 19 and equipment, make the hoist and mount position more accurate.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a hoist device of hydraulic engineering equipment, includes base (1) and places board (19), its characterized in that: the upper end of the base (1) is provided with an upright post (2), a first cavity (3) is arranged in the upright post (2), a second cavity (4) is arranged in the base (1), a motor (5) is arranged in the second cavity (4), the output end of the motor (5) is provided with a rotating shaft (6), a driving bevel gear (7) is arranged on the rotating shaft (6), a driven bevel gear (8) meshed with the driving bevel gear is arranged on the left side of the upper end of the driving bevel gear (7), a screw rod (9) is arranged on the upper end of the driven bevel gear (8), the screw rod (9) extends into the first cavity (3), the upper end and the lower end of the screw rod (9) are connected with the upper side wall and the lower side wall of the upright post (2) through bearings, a third chute (10) is arranged on the right side surface of the upright post (2), a moving block (11) is, the right side of the moving block (11) is connected with a connecting rod (13) through a hinged seat (12), the right side of the connecting rod (13) is provided with a steel wire rope (14), the lower end of the steel wire rope (14) is provided with a hook (15), the front end and the rear end of the right side of the upright post (2) are respectively provided with a first hydraulic cylinder (16), the output end of each first hydraulic cylinder (16) is provided with a piston rod (18), the top of each piston rod (18) is connected to the bottom of the connecting rod (13), two sides of the upper end of the placing plate (19) are provided with lifting lugs (20), each lifting lug (20) is provided with lifting ropes (21), the four groups of lifting ropes (21) are respectively connected to lifting rings (22) used for hooking the hooks (15), four corners of the upper end of the placing plate (19) and the inner sides of the lifting lugs (20), first horizontal pole (24) inboard is equipped with first spout (25), support column (23) inboard is equipped with first slider (26) that is used for sliding connection first spout (25), the upper end left and right sides of support column (23) all is equipped with second horizontal pole (27), the bottom of second horizontal pole (27) is equipped with second spout (28), the upper end of support column (23) is equipped with second slider (29) that are used for sliding connection second spout (28).
2. The hoisting device of the hydraulic engineering equipment according to claim 1, characterized in that: the inboard of support column (23), and be located first slider (26) department and be equipped with locking bolt (30), the width of second slider (29) is greater than the width of support column (23), be equipped with locking bolt (30) on second slider (29).
3. The hoisting device of the hydraulic engineering equipment according to claim 1, characterized in that: base (1) bottom four corners all is equipped with second pneumatic cylinder (31), the bottom of second pneumatic cylinder (31) output is equipped with fixed plate (32), base (1) bottom is equipped with universal wheel (33).
4. The hoisting device of the hydraulic engineering equipment according to claim 1, characterized in that: the inner side surfaces of the first cross bar (24) and the second cross bar (27) are provided with rubber cushions.
5. The hoisting device of the hydraulic engineering equipment according to claim 1, characterized in that: the first hydraulic cylinder (16) is connected to the upright post (2) through a hinged seat (12), and a piston rod (18) at the output end of the first hydraulic cylinder (16) is connected to the bottom of the connecting rod (13) through the hinged seat (12).
6. The hoisting device of the hydraulic engineering equipment according to claim 1, characterized in that: the bottom of support column (23) is equipped with mounting panel (35), be equipped with first screw hole (34) on mounting panel (35), place board (19) and go up evenly distributed and have second screw hole (17).
7. The hoisting method of the hoisting device of the hydraulic engineering equipment as claimed in claim 1, characterized in that: the method specifically comprises the following steps:
s1, placing the equipment in the middle of the upper end of the placing plate (19), moving the supporting column (23) according to the size and the position of the equipment so as to drive the first cross rod (24) and the second cross rod (27) to move, enabling the first cross rod (24) and the second cross rod (27) to fix the equipment, and then fixing the supporting column (23) through the first threaded hole (34) and the second threaded hole (17) by screws;
s2, hanging the hanging ring (22) on the hook (15), starting the motor (5) to drive the screw rod (9) to rotate, so that the moving block (11) moves upwards, and finally driving the hook (15) to lift the placing plate (19) and the equipment on the placing plate (19);
s3, adjusting the angle of the connecting rod (13) through the expansion and contraction of the piston rod at the output end of the first hydraulic cylinder (16), so as to adjust the position of the hook (15), and finally adjust the position of the placing plate (19) and the equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810929583.4A CN108726391B (en) | 2018-08-15 | 2018-08-15 | Hoisting device and hoisting method for hydraulic engineering equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810929583.4A CN108726391B (en) | 2018-08-15 | 2018-08-15 | Hoisting device and hoisting method for hydraulic engineering equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108726391A CN108726391A (en) | 2018-11-02 |
| CN108726391B true CN108726391B (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810929583.4A Expired - Fee Related CN108726391B (en) | 2018-08-15 | 2018-08-15 | Hoisting device and hoisting method for hydraulic engineering equipment |
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| Country | Link |
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| CN (1) | CN108726391B (en) |
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| CN109911777B (en) * | 2019-01-11 | 2020-07-10 | 安徽强力重工起重机械有限公司 | Adjusting lifting device of crane |
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| CN110775833A (en) * | 2019-10-25 | 2020-02-11 | 普拉思工业技术(江苏)有限公司 | Driving device and method for ocean engineering crane |
| CN110775832A (en) * | 2019-10-28 | 2020-02-11 | 徐州贝尔电气有限公司 | A haulage equipment for in factory building |
| CN110775838A (en) * | 2019-11-06 | 2020-02-11 | 徐州三磊机电设备有限公司 | Building material lifting device |
| CN110817704B (en) * | 2019-11-19 | 2021-09-03 | 义乌市牵手电子商务有限公司 | Air conditioner outdoor unit moving device |
| CN110723659B (en) * | 2019-11-20 | 2024-08-20 | 成都理工大学 | Hoisting device for industrial engineering transportation |
| CN112441512B (en) * | 2020-12-02 | 2024-02-27 | 邦泽起重设备股份有限公司 | Hoisting equipment connection structure |
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| CN207404735U (en) * | 2017-11-04 | 2018-05-25 | 福州群欣企业管理咨询有限公司 | One kind, which can weigh, rotates small-sized machine hanger |
| CN207566760U (en) * | 2017-11-16 | 2018-07-03 | 倪德斌 | A kind of water pipeline boom hoisting |
| CN108383006A (en) * | 2018-01-18 | 2018-08-10 | 刘玉馨 | A kind of logistics heavy object conveyance device |
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|---|---|---|---|---|
| CN107445069A (en) * | 2017-09-23 | 2017-12-08 | 江苏拓天金属材料有限公司 | A kind of portable color coil of strip hoisting mechanism |
| CN108016993A (en) * | 2017-11-04 | 2018-05-11 | 福州群欣企业管理咨询有限公司 | One kind, which can weigh, rotates small-sized machine hanger |
| CN207404735U (en) * | 2017-11-04 | 2018-05-25 | 福州群欣企业管理咨询有限公司 | One kind, which can weigh, rotates small-sized machine hanger |
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| CN108383006A (en) * | 2018-01-18 | 2018-08-10 | 刘玉馨 | A kind of logistics heavy object conveyance device |
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| CN108726391A (en) | 2018-11-02 |
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