CN112158711A - Slope roof is built and is risen hoist with integral rising of slope reinforcing bar - Google Patents
Slope roof is built and is risen hoist with integral rising of slope reinforcing bar Download PDFInfo
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- CN112158711A CN112158711A CN202011047835.4A CN202011047835A CN112158711A CN 112158711 A CN112158711 A CN 112158711A CN 202011047835 A CN202011047835 A CN 202011047835A CN 112158711 A CN112158711 A CN 112158711A
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- plate
- reinforcing bar
- lifting
- lifting lug
- steel bars
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/04—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by magnetic means
- B66C1/06—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by magnetic means electromagnetic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention provides an integral lifting sling for inclined steel bars for building a slope roof, which relates to the field of constructional engineering and comprises a hanging plate, wherein a lifting lug mechanism is installed at the top of the hanging plate, two cross bars are fixedly connected to two ends of one side of the hanging plate, two installation rods are arranged between the two cross bars and are respectively hinged to the inner sides of the two cross bars, and a steel bar installation seat is fixedly connected between the two installation rods. This slope roof is built with integral hoist that rises of slope reinforcing bar, when using, at first put the reinforcing bar body respectively into the mounting groove of reinforcing bar mount pad, then place the grip block in one side of reinforcing bar body, it is fixed with grip block and installation pole to use the bolt, grip block and reinforcing bar mount pad can firmly press from both sides the reinforcing bar body tightly, then open the cylinder, the cylinder extension, until the one end contact of iron plate and reinforcing bar body, open the electro-magnet, the electro-magnet can produce magnetic force for iron plate firmly adsorbs the reinforcing bar body.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to an integral lifting sling for an inclined steel bar for building a slope roof.
Background
Reinforcing steel bars (rebars) are steel materials for reinforced concrete and prestressed reinforced concrete, and have a circular cross section, and sometimes a square cross section with rounded corners. Comprises plain round steel bars, ribbed steel bars and twisted steel bars.
The reinforcing steel bar for reinforced concrete is straight bar or wire rod-shaped steel for reinforcing steel bar for reinforced concrete, the shape of the reinforcing steel bar is smooth steel bar and deformed steel bar, and the delivery state is straight bar and wire rod. The plain round steel bars are actually small round steel and wire coils of ordinary low-carbon steel. Deformed bars are surface ribbed bars, usually with 2 longitudinal ribs and transverse ribs distributed uniformly along the length. The cross ribs are 3 types of spiral, herringbone and crescent shapes. Expressed in millimeters of nominal diameter. The nominal diameter of the deformed steel bar is equivalent to the nominal diameter of the smooth steel bar with the same cross section. The nominal diameter of the steel bars is 8-50 mm, and the recommended diameters are 8, 12, 16, 20, 25, 32 and 40 mm. Steel grade: 20MnSi, 20MnV, 25MnSi, BS20 MnSi. The steel reinforcement is mainly subjected to tensile stress in the concrete. The deformed reinforcing steel bar has larger bonding capacity with concrete due to the action of the ribs, so that the deformed reinforcing steel bar can better bear the action of external force. Reinforcing bars are widely used in various building structures. Especially large, heavy, light-duty thin-walled and high-rise building structures.
According to the integral lifting sling for the long and large vertical steel bar provided by the Chinese patent No. CN201510616835.4, the comparison document comprises an upper lifting beam and a lower socket type steel bar anti-swing limiting device which are connected by a steel wire rope, wherein the lifting beam comprises two side clamping plates which are locked by bolts to clamp the steel bar; the socket joint type reinforcing steel bar anti-swing limiting device comprises a socket joint type reinforcing steel bar limiting seat, wherein limiting bellmouths for each hanging reinforcing steel bar to correspondingly insert are arranged on the socket joint type reinforcing steel bar limiting seat in a transverse side-by-side spaced mode, the socket joint type reinforcing steel bar anti-swing limiting device further comprises a locking plate used for locking the reinforcing steel bars in the limiting bellmouths, and the locking plate and the socket joint type reinforcing steel bar limiting seat are fixed through bolts.
When the roof with the slope is built, the inclined steel bars need to be laid on the roof, but the integral lifting sling for the long and large vertical steel bars, which is provided in the comparison document, can only lift the steel bars in the vertical direction, and is not convenient enough for installing the steel bars on the slope roof with the inclination angle.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the integral lifting sling special for the inclined steel bar for building the inclined roof, and solves the problem that the installation of the steel bar of the inclined roof is not convenient enough in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides an integral hoist that rises of slope roof construction with slope reinforcing bar, includes the hanger plate, lug mechanism is installed at the top of hanger plate, two horizontal poles of one side both ends fixedly connected with of hanger plate are provided with two installation poles between two horizontal poles, and two installation poles articulate respectively in the inboard of two horizontal poles, fixedly connected with steel bar installation seat between two installation poles, steel bar installation seat's cross section sets up to the font, and has seted up a plurality of mounting grooves on the steel bar installation seat, is provided with the reinforcing bar body in the mounting groove, one side of steel bar installation seat is provided with the clamp plate, pass through bolted connection between clamp plate and the installation pole, be provided with the tilt mechanism who is used for adjusting the reinforcing bar body angle on the hanger plate.
Preferably, the width of the installation groove is the same as the diameter of the steel bar body.
Preferably, a plurality of positioning blocks matched with the mounting grooves are fixedly connected to the clamping plate.
Preferably, the installation grooves are arranged at equal intervals.
Preferably, the tilting mechanism includes electro-magnet, iron plate, fixed plate, cylinder, main shaft, the cylinder is vertical setting, and cylinder and hanger plate fixed connection, the bottom of cylinder is articulated through axle sleeve and main shaft, the main shaft is perpendicular with the reinforcing bar body, the both ends and the fixed plate fixed connection of main shaft, one side and the electro-magnet fixed connection of main shaft are kept away from to the fixed plate, one side and the iron plate fixed connection of fixed plate are kept away from to the electro-magnet, the length of iron plate equals the length of reinforcing bar mount pad.
Preferably, one side of the iron plate, which is far away from the electromagnet, is provided with a groove matched with the steel bar body.
Preferably, the number of the electromagnets is set to be a plurality, and the plurality of electromagnets are arranged at equal intervals.
Preferably, still include the battery, battery fixed connection is in the top of hanger plate, and battery and electro-magnet and cylinder electric connection.
Preferably, still include the battery, battery fixed connection is in the top of hanger plate, and battery and electro-magnet and cylinder electric connection.
Preferably, the lifting lug mechanism comprises two lifting lug assemblies which are symmetrically arranged on two sides of the storage battery, each lifting lug assembly comprises a first lifting lug, a second lifting lug, a sliding groove, a screw rod and a knob, the first lifting lug is fixedly connected to the top of the hanging plate, the screw rod is hinged to one side of the first lifting lug and is parallel to the hanging plate, a screw hole matched with the screw rod is formed in the second lifting lug, the second lifting lug is matched with the screw rod, the sliding groove is formed in the top of the hanging plate, the sliding groove is parallel to the screw rod, the second lifting lug is in sliding fit with the sliding groove, one end, away from the first lifting lug, of the screw rod is welded with the knob, and the knob is arranged to be a regular hexagonal prism.
(III) advantageous effects
The invention provides an integral lifting sling for an inclined steel bar for building a slope roof. The method has the following beneficial effects:
1. when the integral lifting sling for the inclined steel bars for building the slope roof is used, firstly, the steel bar bodies are respectively placed in the mounting grooves of the steel bar mounting seats, then the clamping plates are placed on one sides of the steel bar bodies, the clamping plates are fixed with the mounting rods by using bolts, the steel bar bodies can be firmly clamped by the clamping plates and the steel bar mounting seats, then, the air cylinders are opened, the air cylinders extend until the iron plates are contacted with one ends of the steel bar bodies, the electromagnets are opened, the electromagnets generate magnetic force, so that the steel bar bodies are firmly adsorbed by the iron plates, then, the extension length of the air cylinders is controlled to adjust the inclination angle of the steel bar bodies until the inclination angle is matched with the installed roof, then, the lifting plates are lifted to the installation position by using lifting equipment, the electromagnets are closed, then, the bolts on the two sides of the clamping plates are screwed down, the clamping plates are dismounted, and, use lifting device to continue to hoist next time after hanging away from the hoist, can be quick install the required slope reinforcing bar of slope roof, the installation is dismantled very fast moreover, easy operation, work efficiency is high.
2. This slope roof is built with integral hoist that rises of slope reinforcing bar, setting through lug mechanism, through rotatory knob, the knob drives the lead screw rotatory, the rotatory position that drives the second lug of lead screw moves along the spout, thereby adjust the position of second lug, because of the inclination of reinforcing bar body can be along with the change of roof slope and corresponding adjustment, consequently whole focus can produce the change and lead to lifting by crane the time unstable, and can make more stability when lifting by crane through the adjustment to second lug position, make things convenient for lifting device to hoist.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a perspective view of the second embodiment of the present invention;
FIG. 3 is a front view of the structure of the present invention;
FIG. 4 is an enlarged view of the structure of FIG. 1 at A according to the present invention;
FIG. 5 is an enlarged view of the structure of FIG. 2 at B in accordance with the present invention;
FIG. 6 is an enlarged view of the structure of FIG. 3 at C according to the present invention.
In the figure: the steel bar installation rack comprises a hanging plate 1, a steel bar body 2, a first lifting lug 3, a cross bar 4, a screw rod 5, a main shaft 6, a fixing plate 7, an air cylinder 8, a storage battery 9, a clamping plate 10, an iron plate 11, an electromagnet 12, an installation rod 13, a second lifting lug 14, a sliding groove 15, a knob 16, a steel bar installation seat 17 and an installation groove 18.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The embodiment of the invention provides an integral lifting sling for inclined steel bars for slope roof construction, which comprises a hanging plate 1, wherein a lifting lug mechanism is installed at the top of the hanging plate 1, two cross rods 4 are fixedly connected to two ends of one side of the hanging plate 1, two installation rods 13 are arranged between the two cross rods 4, the two installation rods 13 are respectively hinged to the inner sides of the two cross rods 4, a steel bar installation seat 17 is fixedly connected between the two installation rods 13, the cross section of the steel bar installation seat 17 is shaped like a Chinese character 'ji', a plurality of installation grooves 18 are formed in the steel bar installation seat 17, a steel bar body 2 is arranged in each installation groove 18, a clamping plate 10 is arranged on one side of each steel bar installation seat 17, the clamping plate 10 is connected with the installation rods 13 through bolts, and an inclination mechanism for adjusting the angle of the steel bar body 2.
The width of the mounting groove 18 is the same as the diameter of the reinforcing steel bar body 2.
A plurality of positioning blocks matched with the mounting grooves 18 are fixedly connected to the clamping plate 10.
The plurality of mounting grooves 18 are equally spaced.
The tilting mechanism includes electro-magnet 12, iron plate 11, fixed plate 7, cylinder 8, main shaft 6, cylinder 8 is vertical setting, and cylinder 8 and hanger plate 1 fixed connection, the bottom of cylinder 8 is passed through the axle sleeve and is articulated with main shaft 6, main shaft 6 is perpendicular with reinforcing bar body 2, the both ends and the fixed plate 7 fixed connection of main shaft 6, one side and the electro-magnet 12 fixed connection of main shaft 6 are kept away from to fixed plate 7, one side and the iron plate 11 fixed connection of fixed plate 7 are kept away from to electro-magnet 12, the length of iron plate 11 equals the length of reinforcing bar mount pad 17.
When the steel bar lifting appliance is used, firstly, the steel bar body 2 is respectively placed in the installation groove 18 of the steel bar installation seat 17, then the clamping plate 10 is placed on one side of the steel bar body 2, the clamping plate 10 and the installation rod 13 are fixed by using bolts, the steel bar body 2 is firmly clamped by the clamping plate 10 and the steel bar installation seat 17, then the air cylinder 8 is opened, the air cylinder 8 extends until the iron plate 11 is contacted with one end of the steel bar body 2, the electromagnet 12 is opened, the electromagnet 12 generates magnetic force, so that the steel bar body 2 is firmly adsorbed by the iron plate 11, then the extension length of the air cylinder 8 is controlled to adjust the inclination angle of the steel bar body 2 until the inclination angle is matched with an installed roof, then the lifting appliance is used for lifting the lifting board 1 to the installation position, the electromagnet 12 is closed, then the bolts on two sides of the clamping plate 10 are screwed down, the clamping plate 10 is dismounted, and then the steel bar, use lifting device to continue to hoist next time after hanging away from the hoist, can be quick install the required slope reinforcing bar of slope roof, the installation is dismantled very fast moreover, easy operation, work efficiency is high.
One side of the iron plate 11, which is far away from the electromagnet 12, is provided with a groove matched with the steel bar body 2.
The number of the electromagnets 12 is set to be plural, and the plural electromagnets 12 are arranged at equal intervals.
Still include battery 9, battery 9 fixed connection is in the top of hanger plate 1, and battery 9 and electro-magnet 12 and cylinder 8 electric connection.
Still include battery 9, battery 9 fixed connection is in the top of hanger plate 1, and battery 9 and electro-magnet 12 and cylinder 8 electric connection.
The lug mechanism includes two lug assemblies, and two lug assembly symmetries set up in the both sides of battery 9, the lug assembly includes first lug 3, second lug 14, spout 15, lead screw 5, knob 16, first lug 3 fixed connection is in the top of hanger plate 1, lead screw 5 articulates in one side of first lug 3, lead screw 5 is parallel with hanger plate 1, set up on the second lug 14 with lead screw 5 assorted screw, the 14 lead screws of second lug cooperate on lead screw 5, spout 15 sets up in the top of hanger plate 1, spout 15 is parallel with lead screw 5, and on 14 sliding fit of second lug 15, the one end that first lug 3 was kept away from to lead screw 5 welds with knob 16, knob 16 sets up to regular hexagonal prism.
Through the setting of lug mechanism, through rotatory knob 16, knob 16 drives lead screw 5 rotatory, the rotatory position that drives second lug 14 of lead screw 5 moves along spout 15, thereby adjust the position of second lug 14, because of the inclination of tendon body 2 can be along with the change of roof slope and corresponding adjustment, consequently whole focus can produce the change and lead to when lifting by crane unstability, and can make more stability when lifting by crane through the adjustment to second lug 14 position, make things convenient for lifting device to hoist and mount.
The working principle is as follows: when the steel bar lifting appliance is used, firstly, the steel bar body 2 is respectively placed in the installation groove 18 of the steel bar installation seat 17, then the clamping plate 10 is placed on one side of the steel bar body 2, the clamping plate 10 and the installation rod 13 are fixed by using bolts, the steel bar body 2 is firmly clamped by the clamping plate 10 and the steel bar installation seat 17, then the air cylinder 8 is opened, the air cylinder 8 extends until the iron plate 11 is contacted with one end of the steel bar body 2, the electromagnet 12 is opened, the electromagnet 12 generates magnetic force, so that the steel bar body 2 is firmly adsorbed by the iron plate 11, then the extension length of the air cylinder 8 is controlled to adjust the inclination angle of the steel bar body 2 until the inclination angle is matched with an installed roof, then the lifting appliance is used for lifting the lifting board 1 to the installation position, the electromagnet 12 is closed, then the bolts on two sides of the clamping plate 10 are screwed down, the clamping plate 10 is dismounted, and then the steel bar, use lifting device to continue to hoist next time after hanging away from the hoist, can be quick install the required slope reinforcing bar of slope roof, the installation is dismantled very fast moreover, easy operation, work efficiency is high.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a slope roof is built with integral hoist that rises of slope reinforcing bar, includes hanger plate (1), its characterized in that: the lifting lug mechanism is installed at the top of lifting plate (1), two cross rods (4) of one side both ends fixedly connected with of lifting plate (1), be provided with two installation pole (13) between two cross rods (4), and two installation pole (13) articulate respectively in the inboard of two cross rods (4), fixedly connected with reinforcing bar mount pad (17) between two installation pole (13), the cross section of reinforcing bar mount pad (17) sets up to the font, and has seted up a plurality of mounting grooves (18) on reinforcing bar mount pad (17), is provided with reinforcing bar body (2) in mounting groove (18), one side of reinforcing bar mount pad (17) is provided with clamp plate (10), pass through bolted connection between clamp plate (10) and mounting pole (13), be provided with the tilt mechanism who is used for adjusting reinforcing bar body (2) angle on lifting plate (1).
2. The integral type lifting sling for the inclined steel bars for the construction of the sloping roof as claimed in claim 1, which is characterized in that: the width of the installation groove (18) is the same as the diameter of the steel bar body (2).
3. The integral type lifting sling for the inclined steel bars for the construction of the sloping roof as claimed in claim 2, wherein: a plurality of positioning blocks matched with the mounting grooves (18) are fixedly connected to the clamping plate (10).
4. The integral type lifting sling for the inclined steel bars for the construction of the sloping roof as claimed in claim 2, wherein: the mounting grooves (18) are arranged at equal intervals.
5. The integral lifting sling for the inclined steel bars for the construction of the sloping roof as claimed in claim 4, wherein: tilting mechanism includes electro-magnet (12), iron plate (11), fixed plate (7), cylinder (8), main shaft (6), cylinder (8) are vertical setting, and cylinder (8) and hanger plate (1) fixed connection, the bottom of cylinder (8) is passed through the axle sleeve and is articulated with main shaft (6), main shaft (6) are perpendicular with reinforcing bar body (2), the both ends and fixed plate (7) fixed connection of main shaft (6), one side and electro-magnet (12) fixed connection of main shaft (6) are kept away from in fixed plate (7), one side and iron plate (11) fixed connection of fixed plate (7) are kept away from in electro-magnet (12), the length of iron plate (11) equals the length of reinforcing bar mount pad (17).
6. The integral type lifting sling for the inclined steel bars for the construction of the sloping roof as claimed in claim 5, wherein: one side of the iron plate (11) far away from the electromagnet (12) is provided with a groove matched with the steel bar body (2).
7. The integral type lifting sling for the inclined steel bars for the construction of the sloping roof as claimed in claim 5, wherein: the number of the electromagnets (12) is set to be a plurality, and the electromagnets (12) are arranged at equal intervals.
8. The integral type lifting sling for the inclined steel bars for the construction of the sloping roof as claimed in claim 5, wherein: still include battery (9), battery (9) fixed connection is in the top of hanger plate (1), and battery (9) and electro-magnet (12) and cylinder (8) electric connection.
9. The integral type lifting sling for the inclined steel bars for the construction of the sloping roof as claimed in claim 8, wherein: the number of the cylinders (8) is not less than two.
10. The integral type lifting sling for the inclined steel bars for the construction of the sloping roof as claimed in claim 8, wherein: the lifting lug mechanism comprises two lifting lug assemblies which are symmetrically arranged on two sides of the storage battery (9), each lifting lug assembly comprises a first lifting lug (3), a second lifting lug (14), a sliding groove (15), a screw rod (5) and a knob (16), the first lifting lug (3) is fixedly connected to the top of the lifting plate (1), the screw rod (5) is hinged to one side of the first lifting lug (3), the screw rod (5) is parallel to the lifting plate (1), the second lifting lug (14) is provided with a screw hole matched with the screw rod (5), the screw rod (5) of the second lifting lug (14) is matched on the screw rod (5), the sliding groove (15) is arranged on the top of the lifting plate (1), the sliding groove (15) is parallel to the screw rod (5), the second lifting lug (14) is matched on the sliding groove (15) in a sliding manner, one end, far away from the first lifting lug (3), of the screw rod (5) is welded with the knob (16, the knob (16) is arranged to be a regular hexagonal prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047835.4A CN112158711B (en) | 2020-09-29 | 2020-09-29 | Slope roof is built and is risen hoist with integral rising of slope reinforcing bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047835.4A CN112158711B (en) | 2020-09-29 | 2020-09-29 | Slope roof is built and is risen hoist with integral rising of slope reinforcing bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112158711A true CN112158711A (en) | 2021-01-01 |
| CN112158711B CN112158711B (en) | 2022-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011047835.4A Active CN112158711B (en) | 2020-09-29 | 2020-09-29 | Slope roof is built and is risen hoist with integral rising of slope reinforcing bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112158711B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0592343U (en) * | 1992-05-15 | 1993-12-17 | 株式会社熊谷組 | Reinforcing bar suspension device |
| JP2002364178A (en) * | 2001-06-08 | 2002-12-18 | Maeda Corp | Material lifting device |
| CN203877730U (en) * | 2014-06-24 | 2014-10-15 | 樊一 | Reinforcing steel bar hoisting structure for crane |
| CN105129602A (en) * | 2015-09-24 | 2015-12-09 | 中铁四局集团第二工程有限公司 | Sling capable of integrally lifting long and large-diameter vertical steel bars |
-
2020
- 2020-09-29 CN CN202011047835.4A patent/CN112158711B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0592343U (en) * | 1992-05-15 | 1993-12-17 | 株式会社熊谷組 | Reinforcing bar suspension device |
| JP2002364178A (en) * | 2001-06-08 | 2002-12-18 | Maeda Corp | Material lifting device |
| CN203877730U (en) * | 2014-06-24 | 2014-10-15 | 樊一 | Reinforcing steel bar hoisting structure for crane |
| CN105129602A (en) * | 2015-09-24 | 2015-12-09 | 中铁四局集团第二工程有限公司 | Sling capable of integrally lifting long and large-diameter vertical steel bars |
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| Publication number | Publication date |
|---|---|
| CN112158711B (en) | 2022-08-12 |
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