CN113415718A - Whole-hole prefabricated box girder hoisting and lifting tool and use method - Google Patents
Whole-hole prefabricated box girder hoisting and lifting tool and use method Download PDFInfo
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- CN113415718A CN113415718A CN202110556639.8A CN202110556639A CN113415718A CN 113415718 A CN113415718 A CN 113415718A CN 202110556639 A CN202110556639 A CN 202110556639A CN 113415718 A CN113415718 A CN 113415718A
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- box girder
- hoisting
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- gasket
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000009434 installation Methods 0.000 claims abstract description 22
- 125000006850 spacer group Chemical group 0.000 abstract description 41
- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 description 12
- 230000009471 action Effects 0.000 description 7
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- B66C1/10—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
- B66C1/62—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 comprising article-engaging members of a shape complementary to that of the articles to be handled
- B66C1/66—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 comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The disclosure relates to the technical field of hoisting of concrete precast box girders, in particular to a mounting tool for a whole-hole precast box girder hoisting sling and a use method. The mounting tool for the whole-hole prefabricated box girder hoisting sling comprises a cushion block assembly which is sleeved on the outer side of one end of a hoisting stud positioned in an inner cavity of a box girder; the stop gasket component is used for limiting the position of the gasket component and is in inserted fit with the lifting stud; and the locking part is arranged on one side of the stopping gasket assembly, which deviates from the top of the box girder, and is used for being in threaded connection with the hoisting stud. In the device that this disclosure provided, through at the spacer subassembly with lift by crane the double-screw bolt cooperation back, set up and end the spacer subassembly, produce limiting displacement to the spacer subassembly, effectively prevent the spacer subassembly with lift by crane the double-screw bolt and break away from, improved the security of spacer subassembly installation to, through ending the limiting displacement of spacer subassembly to the spacer subassembly, effectively reduced the cost of labor, and improved the installation effectiveness of spacer subassembly and locking part.
Description
Technical Field
The disclosure relates to the technical field of hoisting of concrete precast box girders, in particular to a mounting tool for a whole-hole precast box girder hoisting sling and a use method.
Background
In the construction process of the concrete box girder, the concrete box girder is firstly molded and poured, and then is transported to a construction site for assembly and bonding.
When the box girder is transported, firstly, a hoisting stud on a crown block is inserted into an inner cavity of the box girder, then a cushion block and a nut are sequentially installed at the free end of the hoisting stud, the cushion block is sleeved outside the hoisting stud through a through hole, when the nut is installed, at least one worker needs to hold the cushion block, and then another worker takes the nut and installs the nut on the hoisting stud. If before the nut installation, the cushion landing, very easily injures the workman by a crashing object to, it is higher to fix the cushion cost of labor through the manual work, and efficiency is lower.
Disclosure of Invention
In order to solve the technical problem or at least partially solve the technical problem, the present disclosure provides a whole hole precast box girder hoisting sling installation tool and a use method.
The utility model provides a whole hole precast box girder lifts by crane hoist mounting tool includes:
the cushion block assembly is sleeved on the outer side of one end of the lifting stud positioned in the inner cavity of the box girder;
the stop gasket assembly is used for limiting the position of the gasket assembly and is in plug fit with the hoisting stud so that the surface of the stop gasket assembly, which is deviated from the gasket assembly, is abutted against the thread of the hoisting stud;
and the locking component is arranged on one side of the stopping gasket component, which is deviated from the top of the box girder, and is used for being in threaded connection with the hoisting stud.
The utility model provides an in the whole hole precast box girder lifting sling mounting tool use, the roof of box girder is passed to the lifting stud that sets up on the overhead traveling crane, extend to in the inner chamber of box girder, establish the spacer subassembly cover in the lifting stud outside, then will end a spacer subassembly and lift the screw thread butt of screw stud, make the surface that ends the spacer subassembly and deviate from the spacer subassembly and lift the screw thread butt of screw stud, with the position of restriction spacer subassembly, prevent that the spacer subassembly breaks away from with the lifting stud, then with locking part and lifting stud threaded connection, and tighten locking part, realize the box girder and lift the connection of screw stud. In the locking and screwing process, when the distance between the locking nut and the stop washer assembly is small, the stop washer assembly can be taken out, so that the utilization rate of the stop washer assembly is improved.
Through at the spacer subassembly with lift by crane the double-screw bolt cooperation back, set up and end a gasket subassembly, produce limiting displacement to the spacer subassembly, effectively prevent the spacer subassembly with lift by crane the double-screw bolt and break away from, improved the security of spacer subassembly installation to, through ending the limiting displacement of gasket subassembly to the spacer subassembly, effectively reduced the cost of labor, and improved the installation effectiveness of spacer subassembly and locking part.
Optionally, the pad assembly includes at least one pad member, the stop pad assembly includes at least one stop pad, and a stop pad is disposed on one side of each pad member facing the locking member.
Optionally, the stop gasket comprises a gasket body, a slot is formed in the gasket body, and the slot is in insertion fit with the hoisting stud so that one side, facing the locking component, of the gasket body abuts against the thread of the hoisting stud.
Optionally, the stop gasket further comprises a holding portion, the holding portion is arranged at one end of the gasket body, and the thickness of the holding portion is larger than that of the gasket body along a direction perpendicular to the plane of the gasket body.
Optionally, a through groove is arranged on the holding part.
Optionally, a rubber pad is arranged between every two adjacent cushion block components, and the rubber pad is arranged on one side of the stop gasket, which faces away from the inner surface of the box girder.
Optionally, the pad assembly includes a first pad and a second pad, the first pad is configured to abut against the top of the box girder, and the second pad is disposed between the first pad and the locking member.
Optionally, the second cushion block comprises two sub cushion blocks which are rotatably connected, and the two sub cushion blocks are coaxially arranged.
The present disclosure also provides a use method of the whole-hole precast box girder hoisting sling mounting tool, including:
sleeving the cushion block assembly on the outer side of the hoisting stud so as to enable the cushion block assembly to be abutted against the inner surface of the box girder;
inserting and matching a stop gasket assembly with the lifting stud so that the surface of the stop gasket assembly departing from the gasket assembly is abutted against the thread of the lifting stud;
and connecting a locking component with the lifting stud in a threaded manner so as to lock the cushion block assembly.
Optionally, after the locking component is in threaded connection with the hoisting stud to lock the pad assembly, the method further includes:
and taking down the stop gasket assembly.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic view of a whole hole precast box girder hoisting spreader installation tool according to an embodiment of the disclosure;
FIG. 2 is a schematic view of the installation tool with the stop washer removed according to the embodiment of the present disclosure;
FIG. 3 is a cross-sectional view of an installation tool according to an embodiment of the disclosure;
fig. 4 is a schematic structural diagram of a stop washer according to an embodiment of the disclosure.
Wherein, 1-hoisting stud; 2-box girder; 3-a pad assembly; 31-a first head block; 32-a second head block; 321-a sub cushion block; 4-a stop washer; 41-a gasket body; 42-slot; 43-a grip portion; 44-through slots; 5-a locking member; 6-rubber pad; 7-buffer pad.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
As shown in fig. 1 to 3, an embodiment of the present disclosure provides a whole hole precast box girder hoisting spreader installation tool, including:
the cushion block assembly 3 is sleeved on the outer side of one end of the lifting stud 1 positioned in the inner cavity of the box girder 2;
the stop gasket component is used for limiting the position of the gasket component 3, is in plug fit with the lifting stud 1 and is used for abutting the surface of the stop gasket component departing from the gasket component 3 against the thread of the lifting stud 1;
and the locking component 5 is arranged on one side of the stopping gasket component, which is deviated from the top of the box girder 2, and is used for being in threaded connection with the hoisting stud 1.
The utility model provides an in the whole hole prefabricated box girder lifting sling mounting tool use, the lifting stud 1 that sets up on the overhead traveling crane passes the roof of box girder 2, extend to in the inner chamber of box girder 2, establish 3 covers of cushion block subassembly in the lifting stud 1 outside, then will end a gasket subassembly and lift stud 1 cooperation, make the surface that ends the gasket subassembly and deviate from the cushion block subassembly 3 and lift the screw thread butt of stud 1, with the position of restriction cushion block subassembly 3, prevent that cushion block subassembly 3 and lifting stud 1 from breaking away from, then with locking part 5 and lifting stud 1 threaded connection, and tighten locking part 5, realize box girder 2 and lifting stud 1's being connected. In the locking and screwing process, when the distance between the locking nut and the stop washer assembly is small, the stop washer assembly can be taken out, so that the utilization rate of the stop washer assembly is improved.
Through at spacer subassembly 3 with lift by crane double-screw bolt 1 cooperation back, set up and end a gasket subassembly, produce limiting displacement to spacer subassembly 3, prevent effectively that spacer subassembly 3 from breaking away from with lift by crane double-screw bolt 1, improved the security of spacer subassembly 3 installation to, through ending the limiting displacement of gasket subassembly to spacer subassembly 3, effectively reduced the cost of labor, and improved spacer subassembly 3 and locking part 5's installation effectiveness.
In some embodiments, the pad assembly 3 comprises at least one pad member and the stop pad assembly comprises at least one stop pad 4, each pad member being provided with a stop pad 4 on a side facing the locking member 5.
In the above embodiment, the cushion block assembly 3 includes at least one cushion block component, and when the cushion block assembly 3 includes one cushion block component, and when the cushion block component is installed, the cushion block component is sleeved outside the lifting stud 1, and then the lifting stud 1 is provided with the stop gasket 4 to limit the cushion block component, so as to facilitate installation of the locking component 5. When the cushion block assembly 3 includes two or more cushion block components, taking the example that the cushion block assembly 3 includes two cushion block components, the cushion block assembly 3 may include a first cushion block 31 and a second cushion block 32, the first cushion block 31 is configured to abut against the top of the box girder 2, and the second cushion block 32 is disposed between the first cushion block 31 and the locking component 5. In the installation process, the first cushion block 31 is firstly sleeved on the outer side of the lifting stud 1, then the stop gasket 4 is installed to limit the first cushion block 31, then the second cushion block 32 is taken to be sleeved on the outer side of the lifting stud 1, then the stop gasket 4 is installed to limit the position of the second cushion block 32, and finally the locking part 5 is connected with the lifting stud 1 and screwed down, so that the box girder 2 and the stud lifting stud 1 are installed. Each cushion block component can be limited by installing a position gasket at one side of each cushion block component, and the installation efficiency of the cushion block component 3 and the locking component 5 is obviously improved.
As shown in fig. 4, in some embodiments, the stop washer 4 includes a washer body 41, and the washer body 41 is provided with a slot 42, and the slot 42 is in insertion fit with the lifting stud 1, so that a side of the washer body 41 facing the locking component 5 abuts against the thread of the lifting stud 1.
In the above-mentioned end position gasket 4, including gasket body 41, through set up slot 42 on gasket body 41, with gasket body 41 with lift by crane stud 1 grafting cooperation, then gasket body 41 and the screw thread overlap joint that lifts by crane stud 1, under the action of gravity, the cooperation of gasket body 41 with lift by crane stud 1 has been realized, when the cushion part receives the action of gravity pressure in gasket body 41 top, with the increase of pressure that end position gasket 4 complex screw thread received, the frictional force between end position gasket 4 and the screw thread is bigger, end position gasket 4 and lift by crane stud 1 complex stability has further been improved.
In some embodiments, the stop pad 4 further comprises a holding portion 43, the holding portion 43 is disposed at one end of the pad body 41, and the thickness of the holding portion 43 is greater than that of the pad body 41 along a direction perpendicular to the plane of the pad body 41.
When the stop gasket 4 is used, a user needs to hold the holding part 43, and the contact area between the stop gasket 4 and the hand of the user is increased by increasing the thickness of the holding part 43, so that the pressure on the hand when the user takes the stop gasket 4 can be reduced, and the stop gasket 4 is convenient to take.
Specifically, the holding portion 43 is provided with a through groove 44. The convenience of taking the stopper spacer 4 is further improved by providing the through groove 44 in the grip portion 43.
In order to prevent the adjacent gaskets from being abraded due to friction in the rotating process of the locking component 5, a rubber pad 6 is arranged between every two adjacent cushion block components, and the rubber pad 6 is arranged on one side, away from the inner surface of the box girder 2, of the stop gasket 4.
Through set up rubber pad 6 between two adjacent cushion parts, can screw up locking part 5 to the slight compression of taking place of rubber pad 6, under the effect of the restoring force of rubber pad 6, locking part 5 and lift by crane the cooperation between the double-screw bolt 1 more stable to make this mounting tool and lift by crane the cooperation between the double-screw bolt 1 more stable.
In the above embodiment, the pad assembly 3 is disposed between the locking member 5 and the top surface of the box girder 2, and is used for protecting the inner surface of the box girder 2 during the hoisting process, so as to prevent the inner surface of the box girder 2 from being damaged due to the direct contact between the locking member 5 and the inner surface of the box girder 2.
In some embodiments, the first pad 31 includes a first surface for abutting against the top of the box girder 2 and a second surface disposed opposite to the first surface, and the area of the first surface is larger than that of the second surface. That is, by increasing the contact area between the first cushion block 31 and the inner surface of the box girder 2, the local pressure applied to the inner surface of the box girder 2 is reduced, thereby effectively preventing the box girder 2 from being damaged during the hoisting process.
In some embodiments, the pad assemblies 3 are in flexible contact with the inner surface of the box girder 2, and the pad assemblies 3 are in flexible contact with the inner surface of the box girder 2, so that pressure generated by the locking members 5 on the box girder 2 during lifting can be absorbed, stress on the box girder 2 can be reduced, and the inner surface of the box girder 2 can be prevented from being damaged by flexible contact.
Specifically, the first pad 31 is provided with a cushion pad 7 on a first surface thereof. The cushion pad 7 may be made of rubber.
In some embodiments, the second head block 32 includes two sub head blocks 321 rotatably connected, and the two sub head blocks 321 are coaxially disposed.
Since the second pad 32 is disposed adjacent to the locking member 5, friction is generated between the locking member 5 and the second pad 32 during tightening of the locking portion, the second pad 32 can rotate under the action of the friction, and since the rubber pad 6 is disposed between the first pad 31 and the second pad 32, when the second cushion block 32 rotates, the rubber pad 6 acts as a barrier to the rotation of the second cushion block 32, in order to reduce the resistance force applied during the tightening process of the locking member 5, the second spacer 32 is provided with two sub-spacers 321 which rotate coaxially, the sub-spacer 321 close to the locking member 5 can rotate under the action force of the locking member 5, the sub-spacer 321 close to the rubber pad 6 has a larger friction force between the rubber bottom and the sub-spacer 321, the sub-blocks 321 do not rotate, so that relative rotation occurs between the two sub-blocks 321, and the resistance of the rubber pad 6 to the rotation of the locking member 5 is eliminated.
The embodiment of the disclosure also discloses a use method of the whole-hole precast box girder hoisting and lifting tool, which comprises the following steps:
sleeving the cushion block assembly 3 on the outer side of the lifting stud 1 so as to enable the cushion block assembly to be abutted against the inner surface of the box girder;
inserting and matching the stop gasket assembly with the lifting stud 1 so as to enable the surface of the stop gasket assembly departing from the gasket assembly 3 to be abutted against the thread of the lifting stud 1;
a locking member 5 is threadedly connected to the lifting stud 1 to lock the pad assembly 3.
The utility model provides an in the whole hole prefabricated box girder lifting sling mounting tool use, the lifting stud that sets up on the overhead traveling crane passes the roof of box girder, extend to in the inner chamber of box girder, establish the spacer subassembly cover in the lifting stud outside, and make the inner surface butt of spacer subassembly and box girder, then will end a spacer subassembly and lift the cooperation of stud, make the surface that ends the spacer subassembly and deviate from the spacer subassembly and the screw thread butt of lifting stud, with the position of restriction spacer subassembly, prevent that the spacer subassembly breaks away from with the lifting stud, then with locking part and lifting stud threaded connection, and tighten locking part, realize the box girder and lift the connection of stud.
Through at the spacer subassembly with lift by crane the double-screw bolt cooperation back, set up and end the gasket subassembly, produce limiting displacement to the spacer subassembly, effectively prevent the spacer subassembly with lift by crane the double-screw bolt and break away from, the security of spacer subassembly installation has been improved, and, through ending the limiting displacement of gasket subassembly to the spacer subassembly, avoid the mounting tool in the assembling process, exert external force through the manual work and prevent that the gasket subassembly breaks away from and lifts by crane the double-screw bolt, thereby effectively reduced the cost of labor, and improved the installation effectiveness of spacer subassembly and locking part.
Specifically, after the locking component 5 is screwed with the lifting stud 1 to lock the pad assembly 3, the method further comprises the following steps:
and taking down the stop gasket assembly.
In the locking and screwing process, when the distance between the locking nut and the stop washer assembly is small or before the locking nut and the stop washer assembly are not completely screwed, the stop washer assembly can be taken out, so that the utilization rate of the stop washer assembly is improved.
Specifically, when the cushion block assembly 3 comprises two or more cushion block components, after one cushion block component is sleeved on each lifting stud 1, a stop gasket 4 is arranged on each lifting stud, so that the labor cost is reduced, and the safety is improved.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a whole hole precast box girder lifts by crane hoist mounting tool which characterized in that includes:
the cushion block assembly (3) is sleeved on the outer side of one end, located in the inner cavity of the box girder (2), of the hoisting stud (1);
the stop gasket component is used for limiting the position of the gasket component (3), is in plug fit with the hoisting stud (1) and is used for enabling the surface of the stop gasket component departing from the gasket component (3) to abut against the thread of the hoisting stud (1);
the locking component (5) is arranged on one side, away from the top of the box girder (2), of the stopping gasket assembly and is used for being in threaded connection with the hoisting stud (1).
2. The whole hole precast box girder lifting sling installation tool according to claim 1, wherein the cushion block assembly (3) comprises at least one cushion block component, the stop gasket component comprises at least one stop gasket (4), and a stop gasket (4) is arranged on one side of each cushion block component facing the locking component (5).
3. The whole hole precast box girder hoisting sling installation tool according to claim 1 or 2, characterized in that the stop washer (4) comprises a washer body (41), the washer body (41) is provided with a slot (42), and the slot (42) is in plugging fit with the hoisting stud (1) so that one side of the washer body (41) facing the locking part (5) abuts against the thread of the stud hoisting (1).
4. The whole hole precast box girder hoisting sling installation tool according to claim 3, wherein the stop gasket (4) further comprises a holding part (43), the holding part (43) is arranged at one end of the gasket body (41), and the thickness of the holding part (43) is larger than that of the gasket body (41) along a direction perpendicular to the plane of the gasket body (41).
5. The whole hole precast box girder lifting sling installation tool according to claim 4, wherein the holding part (43) is provided with a through groove (44).
6. The whole hole precast box girder hoisting and lifting tool according to claim 2 is characterized in that a rubber pad (6) is arranged between two adjacent pad block components, and the rubber pad (6) is arranged on one side of the stopping pad (4) departing from the inner surface of the box girder (2).
7. The whole hole precast box girder lifting sling installation tool according to claim 2, wherein the pad block assembly (3) comprises a first pad block (31) and a second pad block (32), the first pad block (31) is used for abutting against the top of the box girder (2), and the second pad block (32) is arranged between the first pad block (31) and the locking part (5).
8. The whole hole precast box girder lifting sling installation tool according to claim 7, wherein the second head block (32) comprises two sub head blocks (321) rotatably connected, and the two sub head blocks (321) are coaxially arranged.
9. The use method of the whole-hole precast box girder hoisting and lifting tool is characterized by comprising the following steps of:
sleeving a cushion block assembly (3) on the outer side of the lifting stud (1) so as to enable the cushion block assembly to be abutted against the inner surface of the box girder;
inserting and matching a stop gasket assembly with the hoisting stud (1) so as to enable the surface of the stop gasket assembly departing from the gasket assembly (3) to be abutted against the thread of the hoisting stud (1);
and connecting a locking component (5) with the hoisting stud (1) in a threaded manner so as to lock the cushion block assembly (3).
10. The method according to claim 9, wherein after screwing the locking member (5) with the lifting stud (1) to lock the pad assembly (3), further comprising:
and taking down the stop gasket assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110556639.8A CN113415718A (en) | 2021-05-21 | 2021-05-21 | Whole-hole prefabricated box girder hoisting and lifting tool and use method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110556639.8A CN113415718A (en) | 2021-05-21 | 2021-05-21 | Whole-hole prefabricated box girder hoisting and lifting tool and use method |
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| CN113415718A true CN113415718A (en) | 2021-09-21 |
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| CN210218548U (en) * | 2019-08-28 | 2020-03-31 | 歌拉瑞电梯股份有限公司 | Rope end connecting piece, hoisting structure and traction type building construction elevator |
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