CN112878709B - Accurate and rapid fine adjustment device for large steel column installation and fine adjustment method thereof - Google Patents
Accurate and rapid fine adjustment device for large steel column installation and fine adjustment method thereof Download PDFInfo
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- CN112878709B CN112878709B CN202110128897.6A CN202110128897A CN112878709B CN 112878709 B CN112878709 B CN 112878709B CN 202110128897 A CN202110128897 A CN 202110128897A CN 112878709 B CN112878709 B CN 112878709B
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- hydraulic jack
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/32—Columns; Pillars; Struts of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a precise and rapid fine adjustment device for large steel column installation and a fine adjustment method thereof. The fine adjustment device mainly comprises a fine adjustment tool and a hydraulic jack. The fine adjustment method comprises the steps that a tool main body is placed below a large steel column bottom plate and then is provided with a limiting plate, the short edge of the tool main body is located on the outer side of the large steel column bottom plate, and an embedded bolt penetrating through the large steel column bottom plate is located in a space surrounded by the limiting plate, a left side plate, a right side plate and a hydraulic jack bearing plate; the hydraulic jack is placed between the short edge of the tool main body and the large steel column bottom plate, the hydraulic jack is started to finely adjust the large steel column bottom plate, and the adjusting position plate is placed at the short edge of the tool main body in a laminating mode to guarantee that the hydraulic jack supports and reduce the stroke of the hydraulic jack. When the large steel column is installed, the large steel column can be subjected to efficient and accurate fine adjustment, so that the large steel column can be installed quickly and efficiently, and the installation accuracy error is within 2 mm.
Description
Technical Field
The invention belongs to the technical field of large steel column installation, and particularly relates to an accurate and rapid fine adjustment device and a fine adjustment method for large steel column installation.
Background
When a plurality of large steel columns are installed, the allowed maximum precision error is within 2 mm. The traditional installation method of the large steel column generally comprises the steps of hoisting the large steel column to an embedded part for installation, wherein in the process of hoisting the large steel column to the embedded part and completely fixing the large steel column with embedded bolts on the embedded part, multiple times of height fine adjustment and horizontal position fine adjustment are needed to be carried out on the large steel column, and the large steel column is pulled in place slightly by force after being hoisted by a crane in the fine adjustment process. The fine adjustment force is not easy to control, and the installation and adjustment are difficult.
Therefore, designing a precise and rapid fine tuning device for installing large steel columns and a fine tuning method thereof to realize efficient and precise fine tuning when the large steel columns are installed, so that the large steel columns can be installed rapidly, and the technical problem to be solved by technical personnel in the technical field is urgently needed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the device and the method for accurately and quickly fine-tuning the installation of the large steel column are provided to at least solve some technical problems.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the accurate quick micromatic setting of large-scale steel column installation includes and is fit for with pre-buried bolt in order to carry out the fine setting frock of fine setting location to large-scale steel column to and the hydraulic jack who finely tunes the frock and be fit for in order to carry out the fine setting to large-scale steel column.
Further, the fine adjustment tool comprises an L-shaped tool main body and a limiting plate which is detachably inserted on the long side of the tool main body and is matched with the embedded bolt to limit the distance between the short side of the tool main body and the embedded bolt; the hydraulic jack is positioned between the short side of the tool main body and the side of the large-sized steel column where the bottom plate needs to be finely adjusted.
Further, the tool main body comprises a left side plate and a right side plate which are both L-shaped, and a hydraulic jack bearing plate arranged between the left side plate short plate and the right side plate short plate; the limiting plate is inserted between the left side plate long plate and the right side plate long plate, and the hydraulic jack is propped against the hydraulic jack bearing plate.
Further, the left side plate and the right side plate are arranged in parallel and opposite to each other.
Furthermore, the hydraulic jack supporting plates are vertically distributed with the left side plate and the right side plate.
Furthermore, the hydraulic jack bearing plate is of an integrated structure with the left side plate short plate and the right side plate short plate respectively.
Furthermore, the hydraulic jack bearing plate is fixedly connected with the left side plate short plate and the right side plate short plate in a welding mode.
Furthermore, a left inserting hole is formed in the left side plate long plate, a right inserting hole which is opposite to the left inserting hole is formed in the right side plate long plate, and two ends of the limiting plate are respectively inserted into the left inserting hole and the right inserting hole.
Further, still include the adjustment position board with frock main part minor face looks adaptation, hydraulic jack supports with frock main part minor face looks top through adjusting the position board.
The fine adjustment method of the accurate and quick fine adjustment device for mounting the large steel column comprises the following steps:
and 2, placing the hydraulic jack between the short edge of the tool main body and the large steel column bottom plate, starting the hydraulic jack to finely adjust the large steel column bottom plate, and placing an adjusting position plate at the short edge of the tool main body in a laminating manner to ensure that the hydraulic jack supports and reduce the stroke of the hydraulic jack when the hydraulic jack is placed between the short edge of the tool main body and the large steel column bottom plate.
Compared with the prior art, the invention has the following beneficial effects:
the fine adjustment device is simple in structure, scientific and reasonable in design and convenient to use, and can be used for performing efficient and accurate fine adjustment on the large steel column when the large steel column is installed, so that the large steel column can be installed quickly and efficiently, and the installation accuracy error is within 2 mm.
The fine adjustment device comprises a fine adjustment tool, an adjustment position plate and a hydraulic jack, wherein the fine adjustment tool comprises an L-shaped fine adjustment tool main body and a limit plate, the fine adjustment tool main body comprises an L-shaped left side plate and an L-shaped right side plate which are parallel to each other and are oppositely distributed, a hydraulic jack bearing plate fixed between the short edge of the left side plate and the short edge of the right side plate, and a limit plate inserted between the long edge of the left side plate and the long edge of the right side plate. When the tool is used, firstly, the long edge of the fine tuning tool main body is placed below the large steel column bottom plate, and the embedded bolt for fixing the large steel column is positioned between the left side plate and the right side plate; secondly, inserting a limiting plate into the left inserting hole and the right inserting hole, and positioning the embedded bolt for fixing the large steel column in a space formed by the limiting plate, the left side plate, the right side plate and the hydraulic jack bearing plate in an enclosing mode; then, the adjusting position plate is attached to the bearing surfaces of the hydraulic jack bearing plates, the bearing surfaces of the hydraulic jack bearing plates are respectively flush with the inner side surfaces of the left side plate short plate and the right side plate short plate, or the bearing surfaces of the hydraulic jack bearing plates protrude out of the inner side surfaces of the left side plate short plate and the right side plate short plate; finally, the hydraulic jack is placed between the adjusting position plate and the adjusting side of the large-sized steel column base plate, the hydraulic jack is started, the embedded bolt abuts against the limiting plate to limit the distance between the embedded bolt and the adjusting position plate or the distance between the embedded bolt and the hydraulic jack bearing plate, two ends of the hydraulic jack abut against the hydraulic jack bearing plate and the adjusting side of the large-sized steel column base plate respectively, the hydraulic jack can abut against the adjusting side of the large-sized steel column base plate slightly to conduct position fine adjustment, and the position fine adjustment is quick, efficient and accurate.
Drawings
Fig. 1 is a schematic structural diagram (a schematic structural diagram under a fine tuning condition) of the present invention.
Fig. 2 is a schematic structural view of the fine adjustment tool of the present invention.
FIG. 3 is a top view of the trimming tool of the present invention.
FIG. 4 is a schematic view of the left or right side panel of the present invention.
Fig. 5 is a schematic diagram of a limiting plate according to the present invention.
FIG. 6 is a schematic diagram of an adjusting plate according to the present invention.
Wherein, the names corresponding to the reference numbers are:
1-fine adjustment tool, 2-hydraulic jack, 3-embedded bolt, 4-large steel column, 5-limiting plate, 6-left side plate, 7-right side plate, 8-hydraulic jack bearing plate, 9-left plug hole, 10-right plug hole, 11-adjusting position plate and 12-base plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and thus, it should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; of course, mechanical connection and electrical connection are also possible; alternatively, they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1-6, the large steel column installation accurate and rapid fine adjustment device provided by the invention has the advantages of simple structure, scientific and reasonable design and convenience in use, and can perform efficient and accurate fine adjustment on a large steel column when the large steel column is installed, so that the large steel column is installed rapidly and efficiently, and the installation accuracy error is within 2 mm. In fig. 1, the backing plate 12 is used for temporarily supporting the large steel column 4, for better illustrating the fine adjustment device of the present invention, only one backing plate 12 in the middle is shown in the drawing, the backing plate 12 has a plurality of positions, mainly for temporarily and stably supporting the large steel column 4 so as to facilitate fine adjustment of the large steel column 4, and the backing plate 12 is also used for temporarily and stably supporting the large steel column 4 in the conventional manner when fine adjustment is performed, so the structure and the arrangement of the backing plate 12 are not described in detail in the present invention.
The embodiment 1 provided by the invention is an accurate and rapid fine adjustment device for mounting a large steel column, and comprises a fine adjustment tool 1 which is matched with an embedded bolt 3 to perform fine adjustment positioning on the large steel column 4, and a hydraulic jack 2 which is matched with the fine adjustment tool 1 to perform fine adjustment on the large steel column 4. Will finely tune frock 1 and pre-buried bolt 3 and be connected, adopt 2 bearing of hydraulic jack to finely tune large-scale steel column 4 on finely tuning frock 1, swift high-efficient, can carry out accurate fine setting to large-scale steel column 4 through controlling 2 strokes of hydraulic jack.
The embodiment 2 provided by the invention is an accurate and rapid fine adjustment device for mounting a large steel column, and provides a more preferable specific structure of a fine adjustment tool 1 on the basis of the embodiment 1. The fine tuning tool 1 comprises an L-shaped tool main body and a limiting plate 5 which is detachably inserted on the long side of the tool main body and is matched with the embedded bolt 3 to limit the distance between the short side of the tool main body and the embedded bolt 3; the hydraulic jack 2 is positioned between the short side of the tool main body and the side of the large steel column 4, which needs to be finely adjusted, of the bottom plate. Can dismantle the cartridge with limiting plate 5 in frock main part long edge, limiting plate 5 supports with embedded bolt 3 looks top again when adjusting simultaneously, so can high efficiency control embedded bolt 3 and the interval between the frock main part minor face, uses embedded bolt 3 as reference and fulcrum when realizing 4 position fine settings of large-scale steel column to realize accurate adjustment.
The embodiment 3 provided by the invention is an accurate and rapid fine adjustment device for mounting a large steel column, and provides a more preferable specific structure of a tool main body on the basis of the embodiment 2. The tool main body comprises a left side plate 6 and a right side plate 7 which are both L-shaped, and a hydraulic jack bearing plate 8 arranged between a short plate of the left side plate 6 and a short plate of the right side plate 7; the limiting plate 5 is inserted between the long plate 6 of the left side plate and the long plate 7 of the right side plate, and the hydraulic jack 2 is propped against the bearing plate 8 of the hydraulic jack. The frock main part comprises left side board 6, right side board 7 and hydraulic jack bearing board 8, and the bearing surface of hydraulic jack bearing board flushes with left side board short slab medial surface and right side inboard side respectively, and perhaps, the bearing surface protrusion of hydraulic jack bearing board is in left side board short slab medial surface and right side inboard side, so can conveniently finely tune the operation.
The embodiment 5 provided by the invention is an accurate and quick fine adjustment device for mounting a large steel column, and the optimal position distribution among a hydraulic jack bearing plate 8, a left side plate 6 and a right side plate 7 is given on the basis of the embodiment 4. The hydraulic jack bearing plate 8 is vertically distributed with the left side plate 6 and the right side plate 7. Therefore, the fine adjustment operation is more convenient, and the fine adjustment is more accurate.
The embodiment 6 provided by the invention is an accurate and rapid fine adjustment device for mounting a large steel column, and provides an optimal connection mode between a hydraulic jack bearing plate 8 and a left side plate 6 and a right side plate 7 respectively on the basis of the embodiment 3. The preferred connection mode is as follows: the hydraulic jack bearing plate 8 and the left side plate 6 short plate and the right side plate 7 short plate are of an integrated structure. The preferred connection mode two: the hydraulic jack bearing plate 8 is fixedly connected with the left side plate 6 short plate and the right side plate 7 short plate by welding. The two connection modes enable the hydraulic jack bearing plate 8 to be connected with the left side plate 6 and the right side plate 7 stably, and fine adjustment is guaranteed to be conducted smoothly.
The embodiment 7 provided by the invention is an accurate and rapid fine adjustment device for mounting a large steel column, and provides an optimal structure for realizing a detachable plug-in mounting mode between a limit plate 5 and a left side plate 6 and a right side plate 7 respectively on the basis of the embodiment 3. The long plate of the left side plate 6 is provided with a left inserting hole 9, the long plate of the right side plate 7 is provided with a right inserting hole 10 which is opposite to the left inserting hole 9 and is distributed, and two ends of the limiting plate 5 are respectively inserted into the left inserting hole 9 and the right inserting hole 10. Through above-mentioned structure, limiting plate 5 can be when finely tuning in quick plug-in connection to left spliced eye 9 and right spliced eye 10 to pin buried bolt 3 in the space that limiting plate 5, left side board 6, right side board 7 and hydraulic jack bearing board 8 enclose fast.
The embodiment 8 provided by the invention is a large steel column installation accurate and rapid fine adjustment device, and a technical characteristic adjusting position plate 11 is added on the basis of the embodiment 2. Namely: still include the position adjusting plate 11 with frock main part minor face looks adaptation, hydraulic jack 2 supports with frock main part minor face looks top through position adjusting plate 11. The hydraulic jack support can be effectively guaranteed and the stroke of the hydraulic jack can be reduced by placing the adjusting position plate at the short edge of the tool main body in a fitting mode.
The fine adjustment device comprises a fine adjustment tool, an adjustment position plate and a hydraulic jack, wherein the fine adjustment tool comprises an L-shaped fine adjustment tool main body and a limiting plate, the fine adjustment tool main body comprises an L-shaped left side plate and a L-shaped right side plate which are parallel to each other and are oppositely distributed, a hydraulic jack bearing plate fixed between the short edge of the left side plate and the short edge of the right side plate, and the limiting plate inserted between the long edge of the left side plate and the long edge of the right side plate. When the tool is used, firstly, the long edge of the fine tuning tool main body is placed below the large steel column bottom plate, and the embedded bolt for fixing the large steel column is positioned between the left side plate and the right side plate; secondly, inserting a limiting plate into the left inserting hole and the right inserting hole, and positioning the embedded bolt for fixing the large steel column in a space formed by the limiting plate, the left side plate, the right side plate and the hydraulic jack bearing plate in an enclosing mode; then, the adjusting position plate is attached to the bearing surfaces of the hydraulic jack bearing plates, the bearing surfaces of the hydraulic jack bearing plates are respectively flush with the inner side surfaces of the left side plate short plate and the right side plate short plate, or the bearing surfaces of the hydraulic jack bearing plates protrude out of the inner side surfaces of the left side plate short plate and the right side plate short plate; finally, the hydraulic jack is placed between the adjusting position plate and the adjusting side of the large-sized steel column base plate, the hydraulic jack is started, the embedded bolt abuts against the limiting plate to limit the distance between the embedded bolt and the adjusting position plate or the distance between the embedded bolt and the hydraulic jack bearing plate, two ends of the hydraulic jack abut against the hydraulic jack bearing plate and the adjusting side of the large-sized steel column base plate respectively, the hydraulic jack can abut against the adjusting side of the large-sized steel column base plate slightly to conduct position fine adjustment, and the position fine adjustment is quick, efficient and accurate. .
The invention provides a fine adjustment method of a large steel column installation accurate and rapid fine adjustment device, which comprises the following steps of:
By the method, the position of the large steel column can be quickly and efficiently finely adjusted, the fine adjustment position is accurate, and the installation accuracy error of the large steel column can be within 2 mm.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, but not to limit the technical solutions, and certainly not to limit the patent scope of the present invention; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention; that is, the technical problems to be solved by the present invention, which are not substantially changed or supplemented by the spirit and the concept of the main body of the present invention, are still consistent with the present invention and shall be included in the scope of the present invention; in addition, the technical scheme of the invention is directly or indirectly applied to other related technical fields, and the technical scheme is included in the patent protection scope of the invention.
Claims (6)
1. The large steel column installation accurate and rapid fine adjustment device is characterized by comprising a fine adjustment tool (1) and a hydraulic jack (2), wherein the fine adjustment tool (1) is matched with an embedded bolt (3) to perform fine adjustment and positioning on a large steel column (4), and the hydraulic jack is matched with the fine adjustment tool (1) to perform fine adjustment on the large steel column (4);
the fine adjustment tool (1) comprises an L-shaped tool main body and a limiting plate (5) which is detachably inserted on the long side of the tool main body and is matched with the embedded bolt (3) to limit the distance between the short side of the tool main body and the embedded bolt (3); the hydraulic jack (2) is positioned between the short side of the tool main body and the side of the large steel column (4) which needs to be finely adjusted;
the tool main body comprises a left side plate (6) and a right side plate (7) which are L-shaped, and a hydraulic jack bearing plate (8) arranged between the short plate of the left side plate (6) and the short plate of the right side plate (7); the limiting plate (5) is inserted between the long plate of the left side plate (6) and the long plate of the right side plate (7), and the hydraulic jack (2) is propped against the bearing plate (8) of the hydraulic jack;
a left plug hole (9) is formed in the long plate of the left side plate (6), a right plug hole (10) which is opposite to the left plug hole (9) and is distributed on the long plate of the right side plate (7) in a facing manner is formed in the long plate, and two ends of the limiting plate (5) are respectively plugged in the left plug hole (9) and the right plug hole (10);
still include with adjustment position board (11) of frock main part minor face looks adaptation, hydraulic jack (2) are through adjusting position board (11) and the frock main part minor face looks top to support.
2. The large steel column installation accurate and rapid fine adjustment device according to claim 1, wherein the left side plate (6) and the right side plate (7) are arranged in parallel and opposite to each other.
3. The large steel column installation accurate and rapid fine adjustment device according to claim 2, wherein the hydraulic jack bearing plates (8) are vertically distributed with the left side plate (6) and the right side plate (7).
4. The large steel column installation accurate and rapid fine adjustment device according to claim 1, wherein the hydraulic jack bearing plate (8) is of an integrated structure with the short plate of the left side plate (6) and the short plate of the right side plate (7).
5. The large steel column installation accurate and rapid fine adjustment device according to claim 1, wherein the hydraulic jack bearing plate (8) is fixedly connected with the short plate of the left side plate (6) and the short plate of the right side plate (7) by welding.
6. The fine adjustment method for the large steel column installation precise and rapid fine adjustment device according to any one of claims 1 to 5, characterized by comprising the following steps:
step 1, after a large steel column is hoisted in place, placing a tool main body below a large steel column bottom plate, and assembling a limiting plate, wherein the short edge of the tool main body is positioned outside the large steel column bottom plate, and embedded bolts penetrating through the large steel column bottom plate are positioned in a space surrounded by the limiting plate, a left side plate, a right side plate and a hydraulic jack bearing plate;
step 2, placing the hydraulic jack between the short edge of the tool main body and the large-scale steel column bottom plate, starting the hydraulic jack to finely adjust the large-scale steel column bottom plate, and when the hydraulic jack is placed between the short edge of the tool main body and the large-scale steel column bottom plate, placing the adjusting location plate at the short edge of the tool main body in a laminating mode so as to guarantee that the hydraulic jack supports and reduce the stroke of the hydraulic jack.
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| CN202110128897.6A CN112878709B (en) | 2021-01-29 | 2021-01-29 | Accurate and rapid fine adjustment device for large steel column installation and fine adjustment method thereof |
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| CN202110128897.6A CN112878709B (en) | 2021-01-29 | 2021-01-29 | Accurate and rapid fine adjustment device for large steel column installation and fine adjustment method thereof |
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| CN112878709B true CN112878709B (en) | 2022-08-19 |
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| JP2009249839A (en) * | 2008-04-02 | 2009-10-29 | Kayaba System Machinery Kk | Plumbing adjusting device |
| CN202645026U (en) * | 2012-04-19 | 2013-01-02 | 中冶天工上海十三冶建设有限公司 | Post foot correcting device for steel structure steel post |
| CN203320700U (en) * | 2013-07-19 | 2013-12-04 | 安徽富煌钢构股份有限公司 | Steel structure column foot connecting structure |
| CN203808537U (en) * | 2014-05-08 | 2014-09-03 | 江苏中南建筑产业集团有限责任公司 | Steel column butt-joint plane position correcting device |
| CN103924787A (en) * | 2014-05-08 | 2014-07-16 | 江苏中南建筑产业集团有限责任公司 | Steel column butt joint plane position correction device |
| JP2018003559A (en) * | 2016-07-08 | 2018-01-11 | 株式会社竹中工務店 | Column-beam frame repairing method and repaired column-beam frame |
| CN206143796U (en) * | 2016-09-08 | 2017-05-03 | 中国航天建设集团有限公司 | Rim of a cup basis box steel column and mounting adjustment fixing device |
| CN206289993U (en) * | 2016-10-12 | 2017-06-30 | 中国建筑第八工程局有限公司 | Steel column butt joint misalignment of axe aligning tool |
| CN206346501U (en) * | 2017-01-04 | 2017-07-21 | 中国五冶集团有限公司 | Lifting material chute for the adjustable angle in civil engineering |
| CN209414887U (en) * | 2019-01-16 | 2019-09-20 | 山东电力建设第三工程有限公司 | A kind of large equipment fine position device |
| CN211691541U (en) * | 2019-10-24 | 2020-10-16 | 中铁建设集团有限公司 | Cup mouth basis steel column straightness adjustment equipment that hangs down |
| CN211691530U (en) * | 2019-12-24 | 2020-10-16 | 徐州市凯旭钢结构有限公司 | Bolt ball truss hoisting device |
| CN211769859U (en) * | 2020-01-15 | 2020-10-27 | 中建八局第四建设有限公司 | Steel construction adjustable push-and-pull frock |
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