CN114134926B - Fixing device for detachable and size-adjustable foundation embedded bolt of tower crane - Google Patents
Fixing device for detachable and size-adjustable foundation embedded bolt of tower crane Download PDFInfo
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- CN114134926B CN114134926B CN202111348112.2A CN202111348112A CN114134926B CN 114134926 B CN114134926 B CN 114134926B CN 202111348112 A CN202111348112 A CN 202111348112A CN 114134926 B CN114134926 B CN 114134926B
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- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 230000008859 change Effects 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims description 19
- 238000005452 bending Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a fixing device for detachable and adjustable size of foundation embedded bolts of a tower crane, which belongs to the technical field of foundation of tower cranes and comprises four positioning plates, wherein four sleeves with the same size as foundation bolts are fixedly connected to the upper ends of the four positioning plates, an adjusting mechanism capable of enabling the four positioning plates to keep rectangular change is arranged between the four positioning plates, and a fixing mechanism for fixing the position of the adjusting mechanism is arranged on the adjusting mechanism; the invention is detachable as a whole, each block occupies smaller space, the household car can realize transportation, and the household car can be fixed by the fixing bolts during installation, so that the installation is simple and convenient; the position of the foot bolt is accurately adjusted and fixed before the foundation concrete of the tower crane is poured, and the problem of foundation bolt deviation in the concrete pouring process is avoided.
Description
Technical Field
The invention relates to the technical field of tower crane foundations, in particular to a fixing device for detachable and size-adjustable foundation embedded bolts of a tower crane.
Background
In recent years, with the acceleration of urban progress in China, the trend of the residential development to high-rise is quite obvious, and the rise of high-rise buildings in cities is quite obvious, so that the residential development to high-rise buildings in cities is becoming more and more common. The requirements of the project construction organization on the installation reliability and the safety of the tower crane are higher and higher, and the accuracy of the foundation bolt embedding of the tower crane is particularly critical and important in the foundation construction stage of the tower crane.
When the existing foundation bolts of the tower crane are pre-buried, the distance between the foundation bolts is generally determined manually through a tape measure, then the foundation bolts are directly fixed, the accuracy of the relative positions of the foundation bolts cannot be guaranteed, the bolts are easy to displace and incline when concrete is poured, errors exist in manual adjustment, the positions of the bolts cannot be adjusted after the concrete is solidified, and the mounting openings of the mounting frame cannot be accurately aligned with the bolts when the later tower crane is mounted due to the deviation and inclination of the positions of the bolts, so that the mounting frame cannot be normally mounted.
Based on the above, the invention designs a fixing device for detachable and adjustable foundation embedded bolts of a tower crane, so as to solve the problems.
Disclosure of Invention
The invention aims to provide a fixing device for detachable and adjustable foundation embedded bolts of a tower crane, which solves the problems that when the foundation bolts of the existing tower crane are embedded in the background technology, the distance between the foundation bolts is generally determined manually through a tape measure, then the foundation bolts are directly fixed, the accuracy of the relative positions of a plurality of foundation bolts cannot be guaranteed, the bolts are easy to displace and incline when concrete is poured, errors occur when the manual adjustment is carried out, the positions of the bolts cannot be adjusted after the concrete is solidified, and the mounting ports of a mounting frame cannot be accurately aligned with the bolts when the later-stage tower crane is mounted due to the positional deviation and inclination of the bolts, so that the mounting frame cannot be normally mounted.
In order to achieve the above purpose, the present invention provides the following technical solutions: the fixing device comprises four positioning plates, wherein four sleeves with the same size as the foundation bolts are fixedly connected to the upper ends of the four positioning plates, an adjusting mechanism capable of enabling the four positioning plates to keep rectangular change is arranged between the four positioning plates, and a fixing mechanism for fixing the position of the adjusting mechanism is arranged on the adjusting mechanism;
as a further scheme of the invention, the adjusting mechanism comprises four L-shaped fixing frames, the four fixing frames are composed of hollow square tubes, supporting tubes are fixedly connected to right-angle bending positions of the four fixing frames, the supporting tubes are used for enabling the fixing frames to keep right angles, the four fixing frames are fixedly connected to the upper ends of the four positioning plates, the end parts of the four fixing frames are oppositely arranged in a rectangular mode, and the adjusting square tubes are connected in a sliding mode in pairs;
as a further scheme of the invention, the fixing mechanism comprises a fixing bolt which is connected with the upper end of the fixing frame in a threaded manner, and the fixing bolt can penetrate through the upper end of the fixing frame and fix the adjusting square tube;
as a further scheme of the invention, the four end faces of the end parts of the four fixing frames are provided with notches, extrusion plates are hinged in the notches, one side of each extrusion plate, which is close to the notches, is provided with arc-shaped bulges, each extrusion plate is elastically connected with the surface of the fixing frame through an arc-shaped spring, the surface of the fixing frame is slidably connected with a sliding sleeve, and the sliding sleeve can act on the extrusion plates when moving;
as a further scheme of the invention, the surfaces of the four supporting pipes are fixedly connected with telescopic rods through screws, the end parts of the four telescopic rods are fixedly connected with an adjusting box together, the upper end of the adjusting box is rotationally connected with two adjusting rods, the upper ends of the two adjusting rods are regular hexagons, the bottoms of the two adjusting rods penetrate through the adjusting box and extend into the adjusting box to be fixedly connected with rotating gears, the two rotating gears are arranged in a vertically staggered manner, the two rotating gears are meshed with two racks, the four racks are respectively and parallelly distributed on two sides of the two rotating gears, the end parts of the four racks are fixedly connected with telescopic pushing rods, and the two opposite ends of the two racks driven by the same rotating gear are fixedly connected with pushing rods;
as a further scheme of the invention, sliding grooves are formed at two ends of the upper surface of the fixing frame, telescopic limiting rods are elastically connected to the inner parts of the two sliding grooves through first springs, and two ends of the pushing rod are attached to the surfaces of the limiting rods and slide;
as a further scheme of the invention, a limit groove is formed at the upper end of the fixing frame corresponding to the position of the sliding sleeve, a limit plate is elastically connected in the limit groove through a second spring, protrusions are arranged at two ends of the limit plate, and the limit plate can limit the sliding sleeve when the sliding sleeve moves to a certain position.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is detachable as a whole, each block occupies smaller space, the household car can realize transportation, and the household car can be fixed by the fixing bolts during installation, so that the installation is simple and convenient; the position of the foot bolt is accurately adjusted and fixed before the foundation concrete of the tower crane is poured, and the problem of foundation bolt deviation in the concrete pouring process is avoided.
2. After the positions of the fixing frame and the adjusting square tube are adjusted, the sliding sleeve is pushed to the end part of the fixing frame, the sliding sleeve acts on the extrusion plates, and the four extrusion plates extrude the four end faces of the adjusting square tube, so that the position of the adjusting square tube is positioned in the middle position inside the fixing frame and is fixed, the adjusted adjusting square tube can be stably fixed, the positioning accuracy of the foundation bolt is ensured, and the position of the adjusting square tube is prevented from being deviated when the adjusting square tube is fixed by the fixing bolt.
3. When the fixing frame and the adjusting square tube are installed, the four telescopic rods are installed at the middle position of the surface of the supporting tube by using the screws, after the installation is completed, the two adjusting rods are rotated by using tools such as a spanner, the length and the width of the fixing device can be respectively adjusted by the two adjusting rods, in the process of rotating the adjusting rods, the rotating gears can rotate together, racks on two sides of the rotating gears can move to two sides under the action of the rotating gears, and the pushing rod can push the fixing frame, so that the length or the width of the fixing device can be adjusted, the size of the fixing device can be adjusted quickly, the position of the adjusting square tube on two sides can be prevented from being adjusted manually, and errors caused by manual operation adjustment during adjustment can be reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the structure of FIG. 1 at A;
FIG. 3 is a schematic structural view of the connection relationship between the fixing frame and the adjusting square tube in the invention;
FIG. 4 is a schematic view of the structure of FIG. 3B;
FIG. 5 is a schematic view of the structure of the fixing frame of the present invention after being cut away;
FIG. 6 is a schematic view of the structure of FIG. 5 at C;
FIG. 7 is a schematic view of the overall adjusting tank of the present invention shown in a cut-away configuration;
fig. 8 is a schematic diagram of the structure at D in fig. 7.
In the drawings, the list of components represented by the various numbers is as follows:
the device comprises a positioning plate 1, a sleeve 2, a fixing frame 3, a supporting tube 4, an adjusting square tube 5, a fixing bolt 6, a notch 7, a squeeze plate 8, an arc spring 9, a sliding sleeve 10, a telescopic rod 11, an adjusting box 12, an adjusting rod 13, a rotating gear 14, a rack 15, a push rod 16, a chute 17, a first spring 18, a limiting rod 19, a limiting groove 20, a second spring 21 and a limiting plate 22.
Detailed Description
Referring to fig. 1-8, the present invention provides a technical solution: the fixing device comprises four positioning plates 1, wherein four sleeves 2 with the same size as the foundation bolts are fixedly connected to the upper ends of the four positioning plates 1, an adjusting mechanism capable of enabling the four positioning plates 1 to keep rectangular change is arranged between the four positioning plates 1, and a fixing mechanism for fixing the position of the adjusting mechanism is arranged on the adjusting mechanism;
the adjusting mechanism comprises four L-shaped fixing frames 3, the four fixing frames 3 are composed of hollow square tubes, supporting tubes 4 are fixedly connected to right-angle bent positions of the four fixing frames 3, the supporting tubes 4 are used for enabling the fixing frames 3 to keep right angles, the four fixing frames 3 are fixedly connected to the upper ends of the four positioning plates 1, the end parts of the four fixing frames 3 are oppositely arranged in a rectangular mode in pairs, and adjusting square tubes 5 are slidably connected inside the four fixing frames 3 in pairs;
the fixing mechanism comprises a fixing bolt 6, the fixing bolt 6 is connected to the upper end of the fixing frame 3 in a threaded mode, and the fixing bolt 6 can penetrate through the upper end of the fixing frame 3 and fix the adjusting square tube 5;
according to the invention, before the fixing device is used, the four fixing frames 3 and the four adjusting square tubes 5 are required to be assembled manually, the whole fixing device can be assembled and disassembled, transportation and transportation before and after construction are facilitated, the requirement on transportation equipment is reduced, embedded bolts penetrate through the sleeve 2 and are sleeved with two nuts to be fixed after the fixing device is assembled and molded, the sleeve 2 is beneficial to ensuring the perpendicularity between the foundation bolts and the fixing frames 3, the foundation bolts can be prevented from tilting when concrete is poured, the exposed length of the adjusting square tubes 5 is adjusted, so that the positions of the foundation bolts are accurately positioned, the fixing frames 3 and the adjusting square tubes 5 are fixed by the fixing bolts 6, the positions of the foundation bolts can be accurately positioned, the position of the foundation bolts can be accurately installed with the crane mounting frame, the position of the foundation bolts can be prevented from being deviated when concrete is poured later, the crane mounting frame can not be accurately installed, the fixing device after the crane is installed and the steel wire is used for fixing the concrete is used, the fixing device is removed after the concrete is waited for solidification, the fixing device is disassembled integrally, the fixing device occupies a small space, the position of a small car, the fixing device can be realized, and the fixing device is easy to install by using the fixing bolts 6 when the fixing device is realized when the fixing device is used for realizing the mounting; the position of the foot bolt is accurately adjusted and fixed before the foundation concrete of the tower crane is poured, and the problem of foundation bolt deviation in the concrete pouring process is avoided.
When the fixing frame 3 and the adjusting square tube 5 are adjusted, a gap exists between the fixing frame 3 and the adjusting square tube 5, when the adjusting square tube 5 is fixed by using the fixing bolt 6, a certain deviation can occur in the position of the adjusting square tube 5, so that the position of the foundation bolt has deviation, as a further scheme of the invention, the four end faces of the end parts of the four fixing frames 3 are all provided with the notch 7, the extrusion plates 8 are hinged in the notch 7, one side of each extrusion plate 8 close to the notch 7 is provided with an arc-shaped bulge, each extrusion plate 8 is elastically connected with the surface of the fixing frame 3 through an arc-shaped spring 9, the surface of the fixing frame 3 is slidably connected with the sliding sleeve 10, and the sliding sleeve 10 can act on the extrusion plates 8; after the positions of the fixing frame 3 and the adjusting square tube 5 are adjusted, the sliding sleeve 10 is pushed to the end part of the fixing frame 3, the sliding sleeve 10 acts on the extrusion plates 8, and the four extrusion plates 8 extrude the four end faces of the adjusting square tube 5, so that the position of the adjusting square tube 5 is positioned at the middle position inside the fixing frame 3 and fixed, the adjusted adjusting square tube 5 can be stably fixed, the positioning accuracy of the foundation bolts is guaranteed, and the position of the adjusting square tube 5 is prevented from being offset by fixing the adjusting square tube 5 through the fixing bolts 6.
When the square adjusting pipe 5 is adjusted, errors which are difficult to avoid in manual adjustment are avoided, as a further scheme of the invention, the surfaces of the four supporting pipes 4 are fixedly connected with telescopic rods 11 through screws, the end parts of the four telescopic rods 11 are fixedly connected with an adjusting box 12 together, the upper ends of the adjusting box 12 are rotatably connected with two adjusting rods 13, the upper ends of the two adjusting rods 13 are regular hexagons, the bottoms of the two adjusting rods 13 penetrate through the adjusting box 12 and extend into the adjusting box 12 to be fixedly connected with rotating gears 14, the two rotating gears 14 are arranged in an up-down dislocation way, the two rotating gears 14 are meshed with two racks 15, the four racks 15 are respectively and parallelly distributed on two sides of the two rotating gears 14, the end parts of the four racks 15 are fixedly connected with telescopic pushing rods 16, and the opposite ends of the two racks 15 driven by the same rotating gears 14 are fixedly connected with pushing rods 16; when installing mount 3 and regulation side pipe 5, utilize the screw to install four two telescopic links 11 in the surperficial intermediate position of stay tube 4, after the installation is accomplished, utilize tools such as spanner to rotate regulation pole 13, two regulation poles 13 can adjust fixing device's length and width respectively, in the in-process of rotating regulation pole 13, rotation gear 14 can be along with rotating together, rack 15 of rotation gear 14 both sides can be moved to both sides under rotation gear 14's effect, catch bar 16 can promote mount 3, thereby adjust fixing device's length or width, be favorable to adjusting fixing device's size fast, the position of regulation side pipe 5 of manual regulation both sides has been avoided, the error that manual operation regulation leads to when reducing the adjustment.
After the size of the fixing device is adjusted, when the fixing frame 3 and the adjusting square tube 5 are fixed, the position of the fixing frame 3 can be moved due to touch, as a further scheme of the invention, sliding grooves 17 are formed at the two ends of the upper surface of the fixing frame 3, telescopic limiting rods 19 are elastically connected in the two sliding grooves 17 through first springs 18, and the two ends of a pushing rod 16 are attached to the surfaces of the limiting rods 19 and slide; when adjusting fixing device's size, rotate regulation pole 13, rack 15 can be under the effect of rotation gear 14 and regulation pole 13 to both sides removal, push rod 16 can promote gag lever post 19 earlier, gag lever post 19 can be to both sides removal, push rod 16 can promote mount 3 afterwards, adjust fixing device's length or width, after the regulation is accomplished, gag lever post 19 can be moved inwards under the effect of first spring 18, sliding sleeve 10 can be moved to being close to stripper plate 8 one side under the effect of gag lever post 19, sliding sleeve 10 can have certain extrusion to stripper plate 8, be favorable to making stripper plate 8 to adjust square pipe 5 after adjusting, avoid touching after adjusting and can lead to the position of mount 3 to take place to remove, thereby make the position of rag bolt take place the skew.
When the sliding sleeve 10 acts on the extrusion plate 8, the sliding sleeve 10 slides under the action of the extrusion plate 8 and the arc-shaped spring 9, the square adjusting tube 5 cannot be stably fixed, as a further scheme of the invention, the upper end of the fixing frame 3 is provided with a limiting groove 20 corresponding to the position of the sliding sleeve 10, the limiting groove 20 is elastically connected with a limiting plate 22 through a second spring 21, two ends of the limiting plate 22 are provided with protrusions, and the limiting plate 22 can limit the sliding sleeve 10 when the sliding sleeve 10 moves to a certain position; when adjusting square pipe 5 and fixing, promote slip cap 10, slip cap 10 can act on limiting plate 22, limiting plate 22 can slide to spacing inslot 20, slip cap 10 can act on stripper plate 8 and cross limiting plate 22 afterwards, limiting plate 22 can upwards move under the effect of second spring 21, inject the position of slip cap 10, be favorable to making the position of slip cap 10 remain stable, avoid slip cap 10 to act on stripper plate 8 and adjust square pipe 5 fixed after, slip cap 10 can slide under the effect of arc spring 9, lead to stripper plate 8 can not be stable to fix square pipe 5 with adjusting, thereby lead to the position emergence skew of rag bolt.
Claims (4)
1. The utility model provides a fixing device that tower crane basis pre-buried bolt can be dismantled and adjust size, includes four locating plates (1), its characterized in that: four sleeves (2) with the same size as the foundation bolts are fixedly connected to the upper ends of the four positioning plates (1), adjusting mechanisms capable of enabling the four positioning plates (1) to keep rectangular change are arranged between the four positioning plates (1), and fixing mechanisms for fixing the positions of the adjusting mechanisms are arranged on the adjusting mechanisms;
the adjusting mechanism comprises four L-shaped fixing frames (3), the four fixing frames (3) are composed of hollow square tubes, supporting tubes (4) are fixedly connected to right-angle bending positions of the four fixing frames (3), the supporting tubes (4) are used for enabling the fixing frames (3) to keep right angles, the four fixing frames (3) are fixedly connected to the upper ends of the four positioning plates (1), the end portions of the four fixing frames (3) are oppositely arranged in a rectangular mode in pairs, and the adjusting square tubes (5) are connected inside the four fixing frames (3) in a sliding mode in pairs;
the surface of four stay tubes (4) is fixedly connected with telescopic rods (11) through screws, the end parts of the four telescopic rods (11) are fixedly connected with adjusting boxes (12) together, the upper ends of the adjusting boxes (12) are rotationally connected with two adjusting rods (13), the upper ends of the two adjusting rods (13) are regular hexagons, the bottoms of the two adjusting rods (13) penetrate through the adjusting boxes (12) and extend to the inside of the adjusting boxes (12) to be fixedly connected with rotating gears (14), the two rotating gears (14) are arranged in a vertically staggered mode, the two rotating gears (14) are meshed with two racks (15), the four racks (15) are respectively and parallelly distributed on two sides of the two rotating gears (14), the end parts of the four racks (15) are fixedly connected with telescopic pushing rods (16), and two opposite ends of the two racks (15) driven by the same rotating gear (14) are fixedly connected with pushing rods (16);
both ends of the upper surface of the fixed frame (3) are provided with sliding grooves (17), the inside of each sliding groove (17) is elastically connected with a telescopic limit rod (19) through a first spring (18), and both ends of each pushing rod (16) are attached to the surfaces of the limit rods (19) to slide.
2. The fixing device for detachable and adjustable foundation embedded bolts of a tower crane according to claim 1, wherein the fixing device is characterized in that: the fixing mechanism comprises a fixing bolt (6), the fixing bolt (6) is in threaded connection with the upper end of the fixing frame (3), and the fixing bolt (6) can penetrate through the upper end of the fixing frame (3) and fix the adjusting square tube (5).
3. The fixing device for detachable and adjustable foundation embedded bolts of a tower crane according to claim 1, wherein the fixing device is characterized in that: the four end faces of the end part of the fixing frame (3) are provided with notches (7), the grooves (7) are internally hinged with extrusion plates (8), one sides of the extrusion plates (8) close to the notches (7) are provided with arc protrusions, the extrusion plates (8) are elastically connected with the surface of the fixing frame (3) through arc springs (9), the surface of the fixing frame (3) is slidably connected with a sliding sleeve (10), and the sliding sleeve (10) can act on the extrusion plates (8).
4. The fixing device for detachable and adjustable foundation embedded bolts of a tower crane according to claim 3, wherein the fixing device is characterized in that: the upper end of mount (3) corresponds sliding sleeve (10) position has seted up spacing groove (20), be connected with limiting plate (22) through second spring (21) elastic connection in spacing groove (20), there is the arch at the both ends of limiting plate (22), and limiting plate (22) can be spacing sliding sleeve (10) when sliding sleeve (10) remove certain position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111348112.2A CN114134926B (en) | 2021-11-15 | 2021-11-15 | Fixing device for detachable and size-adjustable foundation embedded bolt of tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111348112.2A CN114134926B (en) | 2021-11-15 | 2021-11-15 | Fixing device for detachable and size-adjustable foundation embedded bolt of tower crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114134926A CN114134926A (en) | 2022-03-04 |
| CN114134926B true CN114134926B (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111348112.2A Active CN114134926B (en) | 2021-11-15 | 2021-11-15 | Fixing device for detachable and size-adjustable foundation embedded bolt of tower crane |
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| CN (1) | CN114134926B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006307496A (en) * | 2005-04-27 | 2006-11-09 | Kazutoshi Koide | Base structure of anchor bolt bearing device |
| CN206637189U (en) * | 2017-03-29 | 2017-11-14 | 山东天齐置业集团股份有限公司 | A kind of large-scale tower crane foundation pre-embedded bolt fixing device |
| CN209636847U (en) * | 2019-03-05 | 2019-11-15 | 中国建筑第二工程局有限公司 | A kind of adjustable tower crane built-in fitting accurate positioning tool |
| CN211779533U (en) * | 2020-03-17 | 2020-10-27 | 李新宁 | Connecting device for stainless steel pipe fittings |
-
2021
- 2021-11-15 CN CN202111348112.2A patent/CN114134926B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006307496A (en) * | 2005-04-27 | 2006-11-09 | Kazutoshi Koide | Base structure of anchor bolt bearing device |
| CN206637189U (en) * | 2017-03-29 | 2017-11-14 | 山东天齐置业集团股份有限公司 | A kind of large-scale tower crane foundation pre-embedded bolt fixing device |
| CN209636847U (en) * | 2019-03-05 | 2019-11-15 | 中国建筑第二工程局有限公司 | A kind of adjustable tower crane built-in fitting accurate positioning tool |
| CN211779533U (en) * | 2020-03-17 | 2020-10-27 | 李新宁 | Connecting device for stainless steel pipe fittings |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114134926A (en) | 2022-03-04 |
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