CN114541464A - Novel tower crane basis lattice column is consolidated device - Google Patents
Novel tower crane basis lattice column is consolidated device Download PDFInfo
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- CN114541464A CN114541464A CN202210293350.6A CN202210293350A CN114541464A CN 114541464 A CN114541464 A CN 114541464A CN 202210293350 A CN202210293350 A CN 202210293350A CN 114541464 A CN114541464 A CN 114541464A
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 21
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 abstract description 8
- 238000012856 packing Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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Abstract
The invention belongs to the technical field of foundation reinforcement of building hoisting machinery. The purpose provides a novel tower crane basis lattice column reinforcing apparatus, and the device should have simple to operate, firm in connection's characteristics. The technical scheme is as follows: the utility model provides a novel tower crane basis lattice column reinforcing apparatus which characterized in that: the device comprises a column embracing component detachably arranged on the periphery of a lattice column and supporting rods for connecting the column embracing component in pairs; the column embracing component comprises a clamping plate bent at a right angle and a hoop which is fixed on the clamping plate and is matched with the clamping plate to hoop the latticed column tightly; all be provided with the ball coupling assembling of joint support pole on the face is buckled to adjacent first face of buckling and the second on the splint.
Description
Technical Field
The invention belongs to the technical field of foundation reinforcement of construction hoisting machinery, and particularly relates to a lattice column diagonal bracing reinforcement device for a tower crane foundation.
Background
Along with social development, urban buildings have higher and higher requirements for underground space, the original basement layer cannot meet the requirements, and the basement layer of the modern urban building is generally more than 2. Often adopt 4 lattice columns as the support below this kind of building site tower crane foundation cushion cap, it is reinforced (rfd) to do the bracing to 4 lattice columns along with the excavation needs of basis, and current reinforcement measure mainly is that the angle steel of on-the-spot measurement size adoption corresponding sectional area welds the reinforcement between the lattice column. Because welding conditions of a construction site are poor, spaces of a plurality of welding positions are narrow, requirements for welders in high-altitude operation are high, the reinforcing surfaces of the lattice columns are not always on the same plane, and a triangular steel plate is required to be arranged between the angle steel and the lattice columns for reinforcing, the reliability of the welding connection positions is not guaranteed; in addition, the stability of the tower crane foundation is reduced after the lattice column is excavated, the tower crane is not allowed to be used, continuous operation is usually needed for 3-5 days when one-time reinforcement is carried out, and a large number of construction units use the tower crane before the inclined strut is not reinforced, so that great potential safety hazards exist. Therefore, it is necessary to reasonably explore the bracing reinforcing device of the lattice column of the tower crane.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provides a novel tower crane foundation lattice column reinforcing device which has the characteristics of convenience in installation and firm connection.
The technical scheme provided by the invention is as follows:
the utility model provides a novel tower crane basis lattice column reinforcing apparatus which characterized in that: the device comprises a column embracing component detachably arranged on the periphery of a lattice column and supporting rods for connecting the column embracing component in pairs; the column embracing component comprises a clamping plate bent at a right angle and a hoop which is fixed on the clamping plate and is matched with the clamping plate to hoop the latticed column tightly; all be provided with the ball coupling assembling of joint support pole on the face is buckled to adjacent first face of buckling and the second on the splint.
The supporting rods comprise an inner supporting rod and an outer supporting rod, one ends of which are mutually sleeved through thread pairs; and the other ends of the inner supporting rod and the outer supporting rod are fixedly connected with corresponding ball connecting components.
The ball connecting assembly comprises a spherical block fixed on the clamping plate through a base, a square block movably sleeved on the spherical block and two semi-rings fixedly connected with the square block through a threaded part; the two semi-rings have the same structure, and the inner walls of the two semi-rings are both provided with arc surfaces which are suitable for the spherical block, so that the two semi-rings can be clamped between the spherical block and the base after being combined into a ring; and the square block is provided with a hemispherical groove for accommodating the spherical block.
The two outer side planes of the clamping plate are respectively provided with a convex block; the lug is provided with a first U-shaped groove; the size of the first U-shaped groove is matched with that of the end part of the hoop, and the first U-shaped groove penetrates through the lug along the length direction, so that the end part of the hoop can be conveniently embedded into the first U-shaped groove along the groove depth direction of the first U-shaped groove when the hoop is installed; the hoop end is positioned in the first U-shaped groove, threads are further formed on the outer peripheral face of the hoop end, and two first nuts matched with the threads and a first anti-falling washer matched with the first nuts are fixed to two sides, corresponding to two ends of the first U-shaped groove, of the lug respectively.
Two side faces, corresponding to two ends of the first U-shaped groove in the length direction, of the lug are respectively provided with a first gasket groove, and the shape of each first gasket groove is matched with that of the first anti-falling gasket.
The square block is provided with a second U-shaped groove; the size of the second U-shaped groove is matched with that of the end part of the supporting rod, and the second U-shaped groove penetrates through the square block along the length direction, so that the end part of the supporting rod can be conveniently embedded into the second U-shaped groove along the groove depth direction of the second U-shaped groove when the supporting rod is installed; the end part of the supporting rod is positioned in the second U-shaped groove, the outer peripheral surface of the end part of the supporting rod is also provided with an external thread, and two second nuts matched with the external thread and two second anti-falling washers matched with the two second nuts are respectively fixed on two side surfaces of the square block, which are corresponding to two ends of the second U-shaped groove in the length direction.
And two side surfaces of the square block corresponding to the length direction of the second U-shaped groove are respectively provided with a second gasket groove, and the shape of the second gasket groove is matched with that of the second anti-falling gasket.
Be provided with a set of ball coupling assembling on the first face of buckling of splint, be provided with three ball coupling assembling of group on the second face of buckling of splint.
The number of the hoops arranged on each clamping plate is not more than four.
The axis of the first gasket groove is coaxial with the axis of the arc surface at the bottom of the first U-shaped groove, so that a first chuck for preventing the first anti-falling gasket from sliding in the radial direction is formed at the groove wall of the first gasket groove close to the two sides of the first U-shaped groove;
the axis of the second gasket groove is coaxial with the axis of the arc surface at the bottom of the second U-shaped groove, so that a second chuck for preventing the second anti-falling gasket from sliding radially is formed at the groove wall of the second gasket groove close to the two sides of the second U-shaped groove.
The invention has the beneficial effects that:
the invention can reinforce the lattice column, the clamping plates and the anchor ear can be tightly hooped on the lattice column after being matched and connected, and the clamping plates can be connected pairwise through the supporting rods, thereby realizing the reinforcing operation between the lattice columns. Wherein, the length of the supporting rod is adjustable, and the angle of the square block in the ball connecting component is also adjustable, so that the application range of the device is widened. In addition, the anchor ear and the clamping plate and the support rod and the square block can be fixedly connected in a mode of embedding in the groove depth direction of the U-shaped groove, the structure is simple and reliable, the disassembly and assembly work is greatly facilitated, the disassembly and assembly efficiency is improved, the reinforcing construction period of the lattice column is greatly shortened, and the latticed column is suitable for popularization and application.
Drawings
Fig. 1 is a schematic perspective view of the present invention mounted on a lattice column.
Fig. 2 is a schematic perspective view of the present invention.
Fig. 3 is a schematic perspective view of a post clip assembly.
Fig. 4 is a schematic perspective view of the support rod.
Fig. 5 is an exploded view of a ball attachment assembly.
Fig. 6 is an enlarged view of a portion a of fig. 2.
Fig. 7 is an enlarged view of a portion B of fig. 3.
Fig. 8 is a schematic front view of two semi-rings combined into a ring.
Fig. 9 is a cross-sectional view taken along line C-C of fig. 8.
Fig. 10 is a cross-sectional view taken along line D-D in fig. 8.
Reference numerals;
1. a column embracing component; 1-1, splints; 1-2, hoop; 1-2-1, a first bending surface; 1-2-2, a second bending surface; 1-3, bumps; 1-3-1, a first U-shaped groove; 1-3-2, a first gasket groove; 1-3-3, a first chuck;
2. a support bar; 2-1, inner supporting rods; 2-2, an outer support rod;
3. a ball connecting assembly; 3-1, a base; 3-2, spherical blocks; 3-3, square blocks; 3-4, half ring; 3-5, hemispherical grooves; 3-6, a second U-shaped groove; 3-7, a second nut; 3-8, a second anti-drop gasket; 3-9, a second gasket groove; 3-10 parts of a second chuck;
4. a lattice column.
Detailed Description
The following further description is made with reference to the embodiments shown in the drawings.
The novel tower crane foundation lattice column reinforcing device shown in fig. 1 and 2 comprises a column embracing component 1, a support rod 2 and a ball connecting component 3.
As shown in fig. 1 to 3, the post clip assembly is detachably mounted on the outer periphery of the lattice post 4; the pole embracing component comprises a clamping plate 1-1 and an anchor ear 1-2. The clamping plate is made of a steel plate bent at a right angle, and two adjacent bending surfaces on the clamping plate are respectively used as a first bending surface 1-2-1 and a second bending surface 1-2-2. The hoop is fixed on the clamping plate and matched with the clamping plate so as to hoop the latticed column. Specifically, two outer side planes of the clamping plate are respectively provided with a lug 1-3, and the lug is provided with a first U-shaped groove 1-3-1; the size of first U-shaped groove suits with the staple bolt tip (the arc surface radius of first U-shaped groove tank bottom is fit for with the radius of staple bolt tip promptly) to first U-shaped groove runs through the lug along length direction, so that the staple bolt tip can conveniently imbed first U-shaped groove along the groove depth direction in first U-shaped groove. The hoop end portion outer peripheral face is further provided with threads and is provided with two first nuts matched with the threads and two first anti-falling washers matched with the first nuts (the first nuts and the first anti-falling washers are not shown in the figure), and the two first nuts and the two first anti-falling washers are fixed to two side faces, corresponding to two ends of the first U-shaped groove in the length direction, of the protruding block respectively. Correspondingly, two side surfaces of the lug, corresponding to two ends of the first U-shaped groove in the length direction, are respectively provided with a first gasket groove 1-3-2 for filling the first anti-dropping gasket; the axis of the first gasket groove is coaxial with the axis of the arc surface at the bottom of the first U-shaped groove, so that the first gasket groove forms a first clamping head 1-3-3 at the groove wall near the two sides of the first U-shaped groove to prevent the first anti-dropping gasket from sliding radially (see fig. 7).
When the hoop is installed, the hoop end is sleeved with the first nut and the first anti-falling washer in advance, the hoop end is embedded into the first U-shaped groove, the first anti-falling washer is filled into the first washer groove on one side corresponding to the first anti-falling washer, the first anti-falling washer is radially limited through the first clamping head, the first nut is screwed, the first anti-falling washer is axially limited, the hoop is firmly positioned in the first U-shaped groove, and the hoop is prevented from sliding out of the first U-shaped groove.
In addition, in order to further improve the connection reliability of the hoops and the clamping plates, a plurality of hoops (preferably, the number of the hoops on each clamping plate is not more than four; and two hoops are arranged on each clamping plate in the figure) can be arranged on each clamping plate, so that the safety performance of the device is improved.
As shown in fig. 1, 2 and 4, the support rods are used for connecting the post clip assemblies two by two. The support rods comprise inner support rods 2-1 and outer support rods 2-2; wherein one end of the inner supporting rod and one end of the outer supporting rod are sleeved through a thread pair, and the length of the inner supporting rod screwed into the outer supporting rod can be adjusted according to the distance between the lattice columns, so that the inner supporting rod is suitable for different working environments. The other ends of the inner supporting rod and the outer supporting rod are connected to the clamping plate through a ball connecting assembly.
As shown in fig. 1, 2, 5 and 6, the ball connecting assembly includes a spherical block 3-2, a square block 3-3 and two half rings 3-4. The spherical block is fixedly welded on the clamping plate through a base 3-1; the square block is provided with a hemispherical groove 3-5 for accommodating the spherical block; the two half rings are fixedly connected with the square block through screws (bolts can be adopted, and are not shown in the figure). The two half rings have the same structure and the inner walls of the two half rings are both provided with arc surfaces which are suitable for the spherical block, so that the two half rings can be clamped between the spherical block and the base after being combined into a ring (see fig. 8 to 10). During operation, the square block is sleeved on the spherical block through the hemispherical groove, and then the two semi-rings are combined into a ring and fixed on the square block through the bolts, so that the two semi-rings are clamped between the spherical block and the base. At this moment, the circular arc surface of two semi-ring inner walls and the spherical space that the hemisphere recess encloses and closes formation just in time are fit for with the size of spherical piece, and under the fender effect of enclosing of two semi-rings, the spherical piece can not break away from the hemisphere recess to when being connected square piece and spherical piece as an organic whole, the bracing piece can be again around the axle center of spherical piece toward arbitrary direction swing a plurality of angles, therefore is showing the convenience that has improved installation work.
The square block is provided with second U-shaped grooves 3-6, the size of each second U-shaped groove is matched with the end part of the support rod (namely, the radius of the arc surface at the bottom of each second U-shaped groove is matched with the radius of the end part of the support rod), and the second U-shaped grooves penetrate through the square block along the length direction, so that the end parts of the support rods can be conveniently embedded into the second U-shaped grooves along the groove depth direction of the second U-shaped grooves. The outer peripheral surface of the end part of the supporting rod is also provided with an external thread and is provided with two second nuts 3-7 matched with the external thread and two second anti-falling washers 3-8 matched with the external thread, and the two second nuts and the two second anti-falling washers are respectively fixed on two side surfaces of the square block corresponding to two ends of the second U-shaped groove in the length direction. Correspondingly, two side surfaces of the square block corresponding to two ends of the second U-shaped groove in the length direction are respectively provided with a second gasket groove 3-9 for filling a second anti-falling gasket; the axis of the second gasket groove is coaxial with the axis of the arc surface at the bottom of the second U-shaped groove, so that a second chuck 3-10 is formed at the groove wall of the second gasket groove close to the two sides of the second U-shaped groove, and the second anti-falling gasket is prevented from sliding radially.
When connecting the bracing piece, adjust the bracing piece to suitable length to establish second nut and second anticreep packing ring in advance at the tip of bracing piece. After the tip embedding second U-shaped groove of bracing piece, pack the second anticreep packing ring to the second packing ring groove in, carry out radial spacing to the second anticreep packing ring through the second joint to the second nut of screwing carries out the axial spacing to the second anticreep packing ring, thereby firmly fixes a position the bracing piece in the second U-shaped groove, prevents that the bracing piece from following the roll-off in the second U-shaped groove. The connection mode of the square blocks and the supporting rods and the connection mode of the clamping plates and the hoops are similar, so that the square blocks and the supporting rods have the advantages of reliable connection and convenience in disassembly and assembly, and the reinforcing period of the lattice column can be greatly shortened.
In this embodiment, be provided with a set of ball coupling assembling on the first face of buckling of splint, be provided with three ball coupling assembling of group (being upper and lower distribution) on the second face of buckling of splint. When the lattice column is in work, the second bending surface can be connected with the three supporting rods, so that the lattice column is conveniently subjected to diagonal bracing reinforcement, and the reinforcement effect is improved; in addition, the square block and the spherical block are movable, so that the angle of the square block can be conveniently adjusted, and the application range of the device is widened.
Finally, it should be noted that the above-mentioned list is only a specific embodiment of the present invention. It is obvious that the present invention is not limited to the above embodiments, but many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (10)
1. The utility model provides a novel tower crane basis lattice column reinforcing apparatus which characterized in that: comprises a column embracing component (1) which is detachably arranged on the periphery of a lattice column (4) and supporting rods (2) which connect the column embracing component in pairs; the column embracing component comprises a clamping plate (1-1) bent at a right angle and a hoop (1-2) fixed on the clamping plate and used for hooping the latticed column in a matching way with the clamping plate; the first bending surface (1-2-1) and the second bending surface (1-2-2) which are adjacent to each other on the splint are provided with ball connecting assemblies for connecting supporting rods.
2. The novel tower crane foundation lattice column reinforcing device of claim 1, wherein: the supporting rods comprise an inner supporting rod (2-1) and an outer supporting rod (2-2), one ends of which are mutually sleeved through a thread pair; and the other ends of the inner supporting rod and the outer supporting rod are fixedly connected with corresponding ball connecting components.
3. The novel tower crane foundation lattice column reinforcing device of claim 2, wherein: the ball connecting assembly comprises a spherical block (3-2) fixed on the clamping plate through a base (3-1), a square block (3-3) movably sleeved on the spherical block, and two semi-rings (3-4) fixedly connected with the square block through a threaded part; the two semi-rings have the same structure, and the inner walls of the two semi-rings are both provided with arc surfaces which are suitable for the spherical block, so that the two semi-rings can be clamped between the spherical block and the base after being combined into a ring; the square block is provided with a hemispherical groove (3-5) for accommodating the spherical block.
4. The novel tower crane foundation lattice column reinforcing device of claim 3, characterized in that: the two outer side planes of the clamping plate are respectively provided with a convex block (1-3); the lug is provided with a first U-shaped groove (1-3-1); the size of the first U-shaped groove is matched with that of the end part of the hoop, and the first U-shaped groove penetrates through the lug along the length direction, so that the end part of the hoop can be conveniently embedded into the first U-shaped groove along the groove depth direction of the first U-shaped groove when the hoop is installed; the hoop end is positioned in the first U-shaped groove, threads are further formed on the outer peripheral face of the hoop end, and two first nuts matched with the threads and a first anti-falling washer matched with the first nuts are fixed to two sides, corresponding to two ends of the first U-shaped groove, of the lug respectively.
5. The novel tower crane foundation lattice column reinforcing device of claim 4, wherein: two side surfaces of the lug, corresponding to two ends of the first U-shaped groove in the length direction, are respectively provided with a first gasket groove (1-3-2), and the shape of the first gasket groove is suitable for the first anti-drop gasket.
6. The novel tower crane foundation lattice column reinforcing device of claim 5, wherein: the square block is provided with a second U-shaped groove (3-6); the size of the second U-shaped groove is matched with that of the end part of the supporting rod, and the second U-shaped groove penetrates through the square block along the length direction, so that the end part of the supporting rod can be conveniently embedded into the second U-shaped groove along the groove depth direction of the second U-shaped groove when the supporting rod is installed; the end part of the supporting rod is positioned in the second U-shaped groove, threads are further formed on the peripheral surface of the end part of the supporting rod, and two second nuts (3-7) matched with the threads and two second anti-falling washers (3-8) matched with the second nuts are respectively fixed on two side surfaces, corresponding to two ends of the second U-shaped groove, of the square block in the length direction.
7. The novel tower crane foundation lattice column reinforcing device of claim 6, characterized in that: and two side surfaces of the square block corresponding to the length direction of the second U-shaped groove are respectively provided with a second gasket groove (1-3-2), and the shape of the second gasket groove is suitable for the second anti-falling gasket.
8. The novel tower crane foundation lattice column reinforcing device of claim 7, wherein: be provided with a set of ball coupling assembling on the first face of buckling of splint, be provided with three ball coupling assembling of group on the second face of buckling of splint.
9. The novel tower crane foundation lattice column reinforcing device of claim 8, wherein: the number of the hoops arranged on each clamping plate is not more than four.
10. The novel tower crane foundation lattice column reinforcing device of claim 8, wherein: the axis of the first gasket groove is coaxial with the axis of the arc surface at the bottom of the first U-shaped groove, so that a first chuck (1-3-3) for preventing the first anti-dropping gasket from sliding in the radial direction is formed at the groove wall of the first gasket groove close to the two sides of the first U-shaped groove;
the axis of the second gasket groove is coaxial with the axis of the arc surface at the bottom of the second U-shaped groove, so that a second chuck (3-10) for preventing the second anti-falling gasket from sliding in the radial direction is formed at the groove wall of the second gasket groove close to the two sides of the second U-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210293350.6A CN114541464B (en) | 2022-03-24 | 2022-03-24 | Novel tower crane foundation lattice column reinforcing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210293350.6A CN114541464B (en) | 2022-03-24 | 2022-03-24 | Novel tower crane foundation lattice column reinforcing device |
Publications (2)
| Publication Number | Publication Date |
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| CN114541464A true CN114541464A (en) | 2022-05-27 |
| CN114541464B CN114541464B (en) | 2023-12-01 |
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| CN202210293350.6A Active CN114541464B (en) | 2022-03-24 | 2022-03-24 | Novel tower crane foundation lattice column reinforcing device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203307836U (en) * | 2013-06-13 | 2013-11-27 | 浙江大学城市学院 | Tower crane pile reinforcing structure |
| CN204590059U (en) * | 2015-01-23 | 2015-08-26 | 福建开辉机械工程有限公司 | A kind of combined type tower-crane foundation structure |
| CN109775586A (en) * | 2019-03-14 | 2019-05-21 | 安徽宏志建设工程有限责任公司 | A kind of removable steel hoop pile derrick crane |
| KR102165225B1 (en) * | 2020-05-25 | 2020-10-13 | 이미영 | Joint bracket |
| KR102216052B1 (en) * | 2020-09-14 | 2021-02-17 | 주식회사 미로 | Angle-adjustable railing structure that prevents the rotation of the crossbar |
| CN215801771U (en) * | 2021-07-09 | 2022-02-11 | 浙江省特种设备科学研究院 | Portable reinforcing apparatus of tower crane basis lattice column |
-
2022
- 2022-03-24 CN CN202210293350.6A patent/CN114541464B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203307836U (en) * | 2013-06-13 | 2013-11-27 | 浙江大学城市学院 | Tower crane pile reinforcing structure |
| CN204590059U (en) * | 2015-01-23 | 2015-08-26 | 福建开辉机械工程有限公司 | A kind of combined type tower-crane foundation structure |
| CN109775586A (en) * | 2019-03-14 | 2019-05-21 | 安徽宏志建设工程有限责任公司 | A kind of removable steel hoop pile derrick crane |
| KR102165225B1 (en) * | 2020-05-25 | 2020-10-13 | 이미영 | Joint bracket |
| KR102216052B1 (en) * | 2020-09-14 | 2021-02-17 | 주식회사 미로 | Angle-adjustable railing structure that prevents the rotation of the crossbar |
| CN215801771U (en) * | 2021-07-09 | 2022-02-11 | 浙江省特种设备科学研究院 | Portable reinforcing apparatus of tower crane basis lattice column |
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| Publication number | Publication date |
|---|---|
| CN114541464B (en) | 2023-12-01 |
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