CN114104965B - Lower jacking tower crane - Google Patents
Lower jacking tower crane Download PDFInfo
- Publication number
- CN114104965B CN114104965B CN202111652181.2A CN202111652181A CN114104965B CN 114104965 B CN114104965 B CN 114104965B CN 202111652181 A CN202111652181 A CN 202111652181A CN 114104965 B CN114104965 B CN 114104965B
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- tower
- lifting
- oil cylinder
- standard
- lifting oil
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- 230000003137 locomotive effect Effects 0.000 claims description 9
- 230000002265 prevention Effects 0.000 claims description 8
- 230000003028 elevating effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 230000009194 climbing Effects 0.000 description 12
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
- B66C5/04—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods with runways or tracks supported for movements relative to bridge or gantry
Abstract
The invention discloses a lower jacking tower crane, and relates to the field of cranes. The lower jacking tower crane is convenient to assemble and disassemble. The lower jacking tower crane comprises a tower, wherein the tower comprises a plurality of standard sections, and the standard sections are sequentially arranged in the up-down direction and are connected; the device also comprises a tower lifting device, wherein the tower lifting device comprises a lifting device frame, a guiding device, a lifting oil cylinder, a supporting head and a swinging driving device; the lifting device frame is arranged around the tower and positioned at the lower part of the tower, and the standard energy can enter the lifting device frame; the guiding device is connected with the lifting device frame and matched with the tower; the lower end of the lifting oil cylinder is hinged with the lifting device frame, the supporting head is connected with the upper end of the lifting oil cylinder, and the supporting head can support the tower; the swing driving device is arranged on the lifting device frame and connected with the lifting oil cylinder, and can drive the lifting oil cylinder to swing.
Description
Technical Field
The invention relates to the field of cranes, in particular to a lower jacking tower crane.
Background
The utility model provides an existing crane includes supporting structure, base, girder, locomotive, hoisting mechanism, wind-testing lightning protection device and elevator, and the vertical interval of supporting structure sets up, and the girder level sets up and is connected with each supporting structure's top, and the locomotive setting is on the girder, and hoisting mechanism is connected with the locomotive, and wind-testing lightning protection device is connected with the girder, and the elevator is installed on the base, and the top and the girder of elevator link up.
After one project of the fixed crane is completed, the crane needs to be moved; for convenient machine moving, the support structure is usually in a tower form, and the tower comprises a plurality of standard sections which are sequentially arranged in the up-down direction and are connected. The tower is disassembled into a standard section during the moving, so that the transportation is convenient.
The tower is usually assembled and disassembled by a climbing device. The standard sections are installed firstly to form a low tower by a small number of standard sections, the climbing device is arranged on the tower, and the lifting mechanism is arranged on the climbing device; the climbing device climbs along the tower, and the lifting mechanism lifts the standard section into the climbing device and is arranged on the existing tower; the tower is lifted, the climbing device continues climbing, then the next standard section is installed, and the process is repeated until all the standard sections are installed. And the climbing device moves downwards when the standard knot is disassembled, and the standard knot is gradually disassembled. ZL201310653517.6 discloses the above.
When the crane tower is disassembled and assembled, the climbing device works in the air, the operation is complicated, the safety is relatively low, and the structure of the climbing device is complex.
Disclosure of Invention
The invention aims to solve the technical problems that: the lower jacking tower crane is convenient to assemble and disassemble.
The technical scheme adopted for solving the problems is as follows: the lower jacking tower crane comprises a tower, wherein the tower comprises a plurality of standard sections, and the standard sections are sequentially arranged in the up-down direction and are connected; the device also comprises a tower lifting device, wherein the tower lifting device comprises a lifting device frame, a guiding device, a lifting oil cylinder, a supporting head and a swinging driving device; the lifting device frame is arranged around the tower and positioned at the lower part of the tower, and the standard energy can enter the lifting device frame; the guiding device is connected with the lifting device frame and matched with the tower; the lower end of the lifting oil cylinder is hinged with the lifting device frame, the supporting head is connected with the upper end of the lifting oil cylinder, and the supporting head can support the tower; the swing driving device is arranged on the lifting device frame and connected with the lifting oil cylinder, and can drive the lifting oil cylinder to swing.
Further is: the guiding device comprises an upper guiding structure and a lower guiding structure which are arranged at intervals in the up-down direction, the upper guiding structure and the lower guiding structure comprise a plurality of guiding wheels, and each guiding wheel is arranged around the tower and is attached to the tower.
Further is: the standard knot is provided with a hook, the support head is provided with a support cross rod, and the support cross rod can support the hook.
Further is: the swing driving device comprises a first telescopic device and a connecting rod, wherein the first telescopic device is horizontally arranged and connected with the lifting device frame, and two ends of the connecting rod are respectively hinged with the first telescopic device and the lifting oil cylinder.
Further is: the tower lifting device comprises a falling prevention device, the falling prevention device is arranged on the lifting device frame, and the falling prevention device can support the tower.
Further is: be provided with the support on the standard festival, prevent falling the device and include second telescoping device, uide bushing and prevent falling the pillar, prevent falling the device level setting, second telescoping device and uide bushing all are connected with the elevating gear frame, prevent falling the pillar from the uide bushing pass and with uide bushing cooperation, second telescoping device is connected with preventing falling the pillar, can support the support when preventing falling the pillar and stretch out.
Further is: the lifting cylinder can drive the tower to rise by one action, and the height of the lifting cylinder is one half of the height of the standard section.
Further is: the lower part jacking pylon formula hoist includes base, girder, locomotive, hoisting mechanism, wind-testing lightning protection device and elevator, and the quantity of pylon is four, and four pylon rectangles are arranged and are installed on the base, and pylon elevating gear sets up with pylon one-to-one and installs on the base, and the girder level sets up and is connected with the top of each pylon, and the locomotive setting is on the girder, and hoisting mechanism is connected with the locomotive, and wind-testing lightning protection device is connected with the girder, and the elevator is installed on the base, and the top of elevator links up with the girder.
The beneficial effects of the invention are as follows: 1. as shown in FIG. 8, when the standard knot is installed, a small number of standard knots are installed first to form a low tower, and the lower part of the tower is not fixed; then the swing driving device drives the lifting oil cylinder to swing inwards, the lifting oil cylinder stretches, and the support head supports the tower; then the lifting oil cylinder continues to extend, and the tower is jacked up, so that the tower is moved up by a distance of the height of the standard section; then moving the standard section into the lifting device frame, aligning the tower, and connecting the tower with the standard section, so that one standard section is installed; and then repeating the steps for a plurality of times to install all the standard knots to form a complete tower. When the tower is disassembled, the lifting oil cylinder and the supporting head support the tower, and the lowest standard section is disassembled and removed; then shortening the lifting oil cylinder to enable the rest tower to descend, and disassembling the standard section again; all standard knots can be disassembled by repeating the above steps for a plurality of times.
The invention has the advantages that the tower is disassembled and assembled on the ground, the operation is convenient, the disassembly and assembly speed of the tower can be improved, and the safety is higher. Compared with the existing climbing device, the tower lifting device is simple in structure and can save cost.
Drawings
FIG. 1 is a front view of a lower lifting tower crane;
FIG. 2 is a right side view of the lower lifting tower crane;
FIG. 3 is a front view of the tower lift;
FIG. 4 is an enlarged view of the upper portion of FIG. 3;
FIG. 5 is a left side view of the tower lift;
FIG. 6 is an enlarged view of the upper portion of FIG. 5;
FIG. 7 is a top view of the tower lift;
FIG. 8 is a diagram of the tower crane operating condition;
marked in the figure as: the tower 1, the standard knot 11, the hook 111, the support 112, the tower lifting device 2, the lifting device rack 21, the guide device 22, the upper guide structure 221, the lower guide structure 222, the guide wheel 223, the lifting oil cylinder 23, the support head 24, the support cross rod 241, the swing driving device 25, the first telescopic device 251, the connecting rod 252, the anti-falling device 26, the second telescopic device 261, the guide sleeve 262, the anti-falling support 263, the base 3, the main beam 4, the mobile car 5, the lifting mechanism 6, the elevator 7 and the wind measuring lightning protection device 8.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in fig. 3 and 4, the lower jacking tower crane comprises a tower 1, wherein the tower 1 comprises a plurality of standard sections 11, and the standard sections 11 are sequentially arranged in the up-down direction and connected; the device also comprises a tower lifting device 2, wherein the tower lifting device 2 comprises a lifting device frame 21, a guiding device 22, a lifting oil cylinder 23, a supporting head 24 and a swinging driving device 25; the lifting device frame 21 is arranged around the tower 1 and positioned at the lower part of the tower 1, and the standard knot 11 can enter the lifting device frame 21; the guiding device 22 is connected with the lifting device frame 21 and matched with the tower 1; the lower end of the lifting oil cylinder 23 is hinged with the lifting device frame 21, the supporting head 24 is connected with the upper end of the lifting oil cylinder 23, and the supporting head 24 can support the tower 1; the swing driving device 25 is mounted on the lifting device frame 21 and connected to the lifting cylinder 23, and the swing driving device 25 can drive the lifting cylinder 23 to swing.
As shown in FIG. 8, when the standard joint 11 is installed, a small number of standard joints 11 are installed first to form a low tower 1, and the lower part of the tower 1 is not fixed; then the swing driving device 25 drives the lifting oil cylinder 23 to swing inwards, the lifting oil cylinder 23 stretches, and the support head 24 supports the tower 1; then the lifting oil cylinder 23 continues to extend to jack up the tower 1, so that the tower 1 moves upwards by the height of the standard section 11; then moving the standard joint 11 into the lifting device frame 21, aligning the tower 1, and connecting the tower 1 with the standard joint 11, so that one standard joint 11 is installed; then the lifting oil cylinder 23 is shortened, and the swing driving device 25 drives the lifting oil cylinder 23 to swing outwards for resetting. Repeating the above operations, all the standard knots 11 can be installed to form the complete tower 1.
When the tower 1 is disassembled, the swing driving device 25 drives the lifting oil cylinder 23 to swing, the lifting oil cylinder 23 stretches, and the support head 24 supports the tower 1; then the lowermost standard knot 11 is disassembled and removed; then the lifting cylinder 23 is shortened, and the tower 1 is moved downwards and placed; then the swing driving device 25 and the lifting oil cylinder 23 act again, and the support head 24 supports the tower 1 again, so that one standard section 11 can be detached; this is repeated a number of times, so that all standard knots 11 can be removed.
The guiding means 22 serve to position the tower 1 so that it remains upright and to guide the up and down movement of the tower 1. Due to the limit of the guiding means 22, the tower 1 will not tilt and the tower lifting means 2 may comprise only one lifting ram 23, a support head 24 and a swinging drive 25. In order to further ensure the balance of the tower 1 and to increase the supporting force, two lifting cylinders 23, a supporting head 24 and a swinging drive 25 may also be symmetrically arranged.
As mentioned before, the guiding means 22 function to position the tower 1 so that it remains vertical and to guide the up and down movement of the tower 1. The guide 22 may have a variety of specific configurations. In order to reduce the friction force applied to the tower 1 by the guide 22 when the tower 1 is lifted, it is preferable that the guide 22 includes an upper guide structure 221 and a lower guide structure 222 arranged at intervals in the up-down direction, each of the upper guide structure 221 and the lower guide structure 222 includes a plurality of guide wheels 223, and each of the guide wheels 223 is arranged around the tower 1 and is fitted to the tower 1, as shown in fig. 3 to 7. The tower 1 is of a generally square shape, each face of which has guide wheels 223 attached thereto.
To facilitate the support of the tower 1 by the support head 24, it is preferred that the standard joint 11 is provided with a hanger 111, and the support head 24 is provided with a support rail 241, the support rail 241 being capable of supporting the hanger 111. When the support head 24 supports the tower 1, the support cross bar 241 is positioned in the concave part of the hook 111, so that the tower 1 can be reliably supported, and the support head 24 is prevented from sliding.
The swing driving device 25 is used for driving the lifting oil cylinder 23 to swing, so that the lifting oil cylinder 23 can be close to or away from the tower 1, and the swing driving device can adapt to the swing of the lifting oil cylinder 23 when the lifting oil cylinder 23 stretches and contracts. The specific structure of the swing drive device 25 is preferably as follows: the swing driving device 25 includes a first telescopic device 251 and a connecting rod 252, the first telescopic device 251 is horizontally disposed and connected with the lifting device frame 21, and both ends of the connecting rod 252 are hinged with the first telescopic device 251 and the lifting cylinder 23, respectively. The first telescopic device 251 may be an existing telescopic device, such as an oil cylinder or an electric telescopic device.
As described above, when the standard joint 11 is attached and detached, the tower 1 needs to be supported. The tower 1 is supported by a lifting cylinder 23 and a supporting head 24 when lifting. When the tower 1 is static, the tower can be supported by the lifting oil cylinder 23 and the supporting head 24, but the service life of the lifting oil cylinder 23 and a hydraulic system for supplying oil to the lifting oil cylinder is not prolonged; and the lifting cylinder 23 is required to drive the tower 1 to lift by one standard section height distance at a time, and when the weight of the tower 1 is large, the lifting cylinder 23 is required to be high.
For the above reasons, as shown in fig. 5 and 6, the tower lifting apparatus 2 of the present invention preferably includes a descent control device 26, the descent control device 26 being mounted on the lifting apparatus frame 21, the descent control device 26 being capable of supporting the tower 1. The tower 1 may be supported by anti-descent devices 26 when stationary to facilitate the life of the lift cylinders 23 and associated hydraulic systems.
The specific structure of the descent control device 26 is preferably as follows: the standard knot 11 is provided with the support 112, the anti-falling device 26 comprises a second telescopic device 261, a guide sleeve 262 and an anti-falling support 263, the anti-falling device 26 is horizontally arranged, the second telescopic device 261 and the guide sleeve 262 are connected with the lifting device frame 21, the anti-falling support 263 penetrates through the guide sleeve 262 and is matched with the guide sleeve 262, the second telescopic device 261 is connected with the anti-falling support 263, and the support 112 can be supported when the anti-falling support 263 stretches out. The second telescopic device 261 may be any existing telescopic device, such as an oil cylinder or an electric telescopic device.
The second telescopic device 261 drives the anti-falling post 263 to extend, the support 112 is abutted against the anti-falling post 263, the anti-falling device 26 supports the tower 1, and the guide sleeve 262 prevents the anti-falling post 263 from swinging.
By having the anti-falling device 26, the lifting cylinder 23 can lower the height of the tower 1 at a time, thereby reducing the length of the lifting cylinder 23 and improving the strength and stability thereof. Preferably, the lifting cylinder 23 can drive the tower 1 to rise by one action by a height which is one half of the height of the standard knot 11. In this way, after the lifting oil cylinder 23 drives the tower 1 to ascend once, the anti-descending device 26 supports the tower 1, and then the lifting oil cylinder 23 drives the tower 1 to ascend once again, so that the tower 1 can ascend by the height of one standard section 11. The same is true when the tower 1 descends, the lifting oil cylinder 23 acts twice, the tower 1 can descend by the height of one standard section 11, and the anti-descending device 26 supports the tower 1 between the two actions of the lifting oil cylinder 23.
The invention mainly improves the standard knot installation structure of the crane tower 1. Other structures of the lower jacking tower crane can refer to the prior art, for example, the lower jacking tower crane comprises a base 3, a main beam 4, a travelling car 5, a lifting mechanism 6, wind-measuring lightning protection devices 8 and elevators 7, the number of the towers 1 is four, the four towers 1 are arranged in a rectangular mode and are installed on the base 3, the tower lifting devices 2 and the towers 1 are arranged in a one-to-one correspondence mode and are installed on the base 3, the main beams 4 are horizontally arranged and are connected with the top ends of the towers 1, the travelling car 5 is arranged on the main beam 4, the lifting mechanism 6 is connected with the travelling car 5, the wind-measuring lightning protection devices 8 are connected with the main beams 4, the elevators 7 are installed on the base 3, and the tops of the elevators 7 are connected with the main beams 4.
The tower 1 is dismounted and mounted on the ground, so that the operation is convenient, the dismounting speed of the tower 1 can be improved, and the safety is higher. Compared with the existing climbing device, the tower lifting device 2 is simple in structure and can save cost.
The present invention requires lifting of the tower 1 and also requires the use of guides 22 to avoid tilting of the tower 1. If the tower 1 is high and heavy, the difficulty in lifting the tower 1 is high, and the difficulty in preventing the tower 1 from tilting by the guiding device 22 is also high. The invention is thus mainly suitable for cranes with not very high towers 1. The device is particularly suitable for occasions with changeable maximum lifting height.
Claims (7)
1. The lower jacking tower crane comprises a tower (1), wherein the tower (1) comprises a plurality of standard sections (11), and the standard sections (11) are sequentially arranged in the up-down direction and are connected; the method is characterized in that: the device comprises a tower lifting device (2), wherein the tower lifting device (2) comprises a lifting device frame (21), a guiding device (22), a lifting oil cylinder (23), a supporting head (24) and a swinging driving device (25); the lifting device frame (21) is arranged around the tower (1) and is positioned at the lower part of the tower (1), and the standard section (11) can enter the lifting device frame (21); the guiding device (22) is connected with the lifting device frame (21) and is matched with the tower (1); the lower end of the lifting oil cylinder (23) is hinged with the lifting device frame (21), the supporting head (24) is connected with the upper end of the lifting oil cylinder (23), and the supporting head (24) can support the tower (1); the swing driving device (25) is arranged on the lifting device frame (21) and is connected with the lifting oil cylinder (23), and the swing driving device (25) can drive the lifting oil cylinder (23) to swing;
the swing driving device (25) comprises a first telescopic device (251) and a connecting rod (252), the first telescopic device (251) is horizontally arranged and connected with the lifting device frame (21), and two ends of the connecting rod (252) are respectively hinged with the first telescopic device (251) and the lifting oil cylinder (23);
when the standard joint (11) is installed, a small amount of standard joints (11) are installed firstly to form a low tower (1), and the lower part of the tower (1) is not fixed; then the swing driving device (25) drives the lifting oil cylinder (23) to swing inwards, the lifting oil cylinder (23) stretches, and the support head (24) supports the tower (1); then the lifting oil cylinder (23) continues to extend, and the tower (1) is jacked up, so that the tower (1) is upwards moved by a distance equal to the height of the standard section (11); then moving the standard joint (11) into the lifting device frame (21), aligning the tower (1), and connecting the tower (1) with the standard joint (11), so that one standard joint (11) is installed; then the lifting oil cylinder (23) is shortened, and the swing driving device (25) drives the lifting oil cylinder (23) to swing outwards for resetting; repeating the above operation, and installing all standard sections (11) to form a complete tower (1);
when the tower (1) is disassembled, the swing driving device (25) drives the lifting oil cylinder (23) to swing, the lifting oil cylinder (23) stretches, and the support head (24) supports the tower (1); then the lowermost standard knot (11) is disassembled and removed; then the lifting oil cylinder (23) is shortened, and the tower (1) is moved downwards and placed; then the swing driving device (25) and the lifting oil cylinder (23) act again, the support head (24) supports the tower (1) again, and a standard joint (11) can be detached; this is repeated a number of times, all standard knots (11) being removed.
2. The lower jacking tower crane of claim 1, wherein: the guiding device (22) comprises an upper guiding structure (221) and a lower guiding structure (222) which are arranged at intervals in the up-down direction, the upper guiding structure (221) and the lower guiding structure (222) comprise a plurality of guiding wheels (223), and each guiding wheel (223) is arranged around the tower (1) and is attached to the tower (1).
3. The lower jacking tower crane of claim 1, wherein: the standard knot (11) is provided with a hook (111), the supporting head (24) is provided with a supporting cross rod (241), and the supporting cross rod (241) can support the hook (111).
4. A lower hoisting tower crane according to any one of claims 1 to 3, characterized in that: the tower lifting device (2) comprises a falling prevention device (26), the falling prevention device (26) is arranged on the lifting device frame (21), and the falling prevention device (26) can support the tower (1).
5. The lower jacking tower crane of claim 4, wherein: be provided with support (112) on standard festival (11), fall prevention device (26) include second telescoping device (261), uide bushing (262) and prevent falling pillar (263), fall prevention device (26) level sets up, second telescoping device (261) and uide bushing (262) all are connected with elevating gear rack (21), prevent falling pillar (263) pass from uide bushing (262) and with uide bushing (262) cooperation, second telescoping device (261) are connected with prevent falling pillar (263), prevent falling pillar (263) and can support (112) when stretching out.
6. The lower jacking tower crane of claim 5, wherein: the lifting cylinder (23) can drive the tower (1) to rise by one action, and the height of the lifting cylinder is one half of that of the standard section (11).
7. The lower jacking tower crane of claim 6, wherein: including base (3), girder (4), locomotive (5), hoisting mechanism (6), survey wind lightning protection device (8) and elevator (7), the quantity of pylon (1) is four, four pylon (1) rectangle are arranged and are installed on base (3), pylon elevating gear (2) set up and install on base (3) with pylon (1) one-to-one, girder (4) level sets up and is connected with the top of each pylon (1), locomotive (5) set up on girder (4), hoisting mechanism (6) are connected with locomotive (5), survey wind lightning protection device (8) are connected with girder (4), elevator (7) are installed on base (3), the top of elevator (7) links up with girder (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111652181.2A CN114104965B (en) | 2021-12-30 | 2021-12-30 | Lower jacking tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111652181.2A CN114104965B (en) | 2021-12-30 | 2021-12-30 | Lower jacking tower crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114104965A CN114104965A (en) | 2022-03-01 |
| CN114104965B true CN114104965B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111652181.2A Active CN114104965B (en) | 2021-12-30 | 2021-12-30 | Lower jacking tower crane |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207722741U (en) * | 2017-11-30 | 2018-08-14 | 罗斯（无锡）设备有限公司 | A kind of bolt detent mechanism |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080314853A1 (en) * | 2007-06-25 | 2008-12-25 | Putzmeister, Inc. | Climbing and support system for pumping tower |
| IL238098A (en) * | 2015-04-01 | 2016-04-21 | Sky Line Cranes & Technologies Ltd | Modular, adaptable and foldable apparatus for a climbing crane |
| CN205187706U (en) * | 2015-10-10 | 2016-04-27 | 徐州建机工程机械有限公司 | Jacking formula standard festival introduction device under tower crane |
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2021
- 2021-12-30 CN CN202111652181.2A patent/CN114104965B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207722741U (en) * | 2017-11-30 | 2018-08-14 | 罗斯（无锡）设备有限公司 | A kind of bolt detent mechanism |
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| Publication number | Publication date |
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| CN114104965A (en) | 2022-03-01 |
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