CN113666279A - Wall-attached embedded part of external climbing tower crane - Google Patents
Wall-attached embedded part of external climbing tower crane Download PDFInfo
- Publication number
- CN113666279A CN113666279A CN202110937062.5A CN202110937062A CN113666279A CN 113666279 A CN113666279 A CN 113666279A CN 202110937062 A CN202110937062 A CN 202110937062A CN 113666279 A CN113666279 A CN 113666279A
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- wall
- wall body
- positioning panel
- hole
- anchoring
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- 230000009194 climbing Effects 0.000 title claims abstract description 30
- 238000004873 anchoring Methods 0.000 claims abstract description 51
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 40
- 230000000149 penetrating effect Effects 0.000 claims abstract description 31
- 238000002955 isolation Methods 0.000 claims description 4
- 230000007306 turnover Effects 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
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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
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
- B66C23/208—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures with supporting couples provided from the side, e.g. by walls of buildings
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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
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Civil Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a wall-attached embedded part of an external climbing tower crane, which comprises: the positioning panel is embedded in the outer side face of the first wall body of the shear wall, one end of the positioning panel corresponds to the position of the second wall body of the shear wall, and the positioning panel is connected with an ear plate; the reinforcing plate is attached to the inner side of the first wall body and corresponds to the other end of the positioning panel in position; the wall penetrating piece is detachably arranged in the first wall body in a penetrating way and is pulled and tied at the other ends of the reinforcing plate and the positioning panel; the anchoring piece is detachably embedded in the first wall body and is detachably connected to one end of the positioning panel, and the other end of the anchoring piece extends into the second wall body; and the anti-pulling piece is arranged at an angle with the anchoring piece, is detachably embedded in the second wall body and is detachably connected to the other end of the anchoring piece, and the end part of the anti-pulling piece penetrates through the second wall body. The invention solves the problems that most parts of the traditional tower crane wall-attached embedded part cannot be recycled and a large amount of resources are wasted.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a wall-attached embedded part of an outer climbing tower crane.
Background
The embedded parts of the existing external climbing tower crane and the internal climbing tower crane generally comprise ear plates, stiffening ribs, panels, anchor plates and end plates, the embedded parts at the lower parts are idle and useless every time the tower crane climbs, the general processing method is to cut the embedded parts along the panels, the cut parts are mainly the ear plates and the stiffening ribs, and the panels, the anchor plates and the end plates are all left in the shear wall, so that a large amount of waste of steel structure materials is caused, and great economic loss is caused.
Disclosure of Invention
In order to overcome the defects in the prior art, the wall-attached embedded part of the external climbing tower crane is provided so as to solve the problems that most parts of the traditional tower crane wall-attached embedded part cannot be used in a turnover mode and a large amount of resources are wasted.
In order to achieve the above object, there is provided a wall attachment embedded part of an external tower crane, the wall attachment embedded part being used for a shear wall, the shear wall including a first wall body and a second wall body connected to an inner side of the first wall body at an angle, the wall attachment embedded part including:
the positioning panel is embedded in the outer side face of the first wall body, the position of one end of the positioning panel corresponds to the position of the second wall body, and the outer side of the positioning panel is connected with an ear plate;
the reinforcing plate is attached to the inner side of the first wall body, and the position of the reinforcing plate corresponds to the position of the other end, far away from the second wall body, of the positioning panel;
the wall penetrating piece is detachably arranged in the first wall in a penetrating way and is pulled and tied at the other ends of the reinforcing plate and the positioning panel;
the anchoring piece is detachably embedded in the first wall body, one end of the anchoring piece is detachably connected to one end of the positioning panel, and the other end, far away from the positioning panel, of the anchoring piece extends into the second wall body; and
and the anti-pulling piece is arranged at an angle with the anchoring piece, is detachably embedded in the second wall body and is detachably connected to the other end of the anchoring piece, and the end part of the anti-pulling piece penetrates through the second wall body.
Furthermore, the number of the wall penetrating pieces is multiple, and the wall penetrating pieces are arranged along the height direction of the first wall body.
Further, the number of the anchoring parts is a plurality,
further, the outside of the anchoring piece and the anti-pulling piece are coated with an isolation film.
Furthermore, a pore-forming sleeve is embedded in the first wall body, the pore-forming sleeve penetrates through the first wall body, and a through hole for the wall penetrating piece to movably penetrate through is formed in the first wall body after the pore-forming sleeve is detached.
Furthermore, an external thread is formed at the other end of the anchoring piece, a first threaded hole is formed in the anti-pulling piece, and the other end of the anchoring piece is screwed in the first threaded hole of the anti-pulling piece.
Furthermore, a second threaded hole is formed in the end face of one end of the anchoring part, a first through hole aligned with the second threaded hole is formed in the other end of the positioning panel, the first through hole penetrates through a first bolt, and the first bolt is screwed in the second threaded hole.
Further, the wall penetrating piece is a through screw, a second perforation is formed in one end of the positioning panel, a third perforation is formed in the reinforcing plate, two ends of the through screw are respectively penetrated and arranged in the second perforation and the third perforation, two ends of the through screw are respectively screwed with fastening nuts, one end of the through screw is pressed against the outer side of one end of the positioning panel, and the other end of the through screw is pressed against the outer side of the reinforcing plate.
The wall-attached embedded part of the external climbing tower crane has the advantages that after the external climbing tower crane climbs, the positioning panel, the wall penetrating part, the anchoring part, the anti-pulling part and the reinforcing plate are respectively detached from the shear wall to be circularly used on the shear wall at the upper part of the core barrel, so that the resource utilization rate is improved. Along with the increase of a core section of thick bamboo height, the thickness of a core section of thick bamboo wall body diminishes gradually, when first wall body bearing capacity unsatisfied requirement through calculating, can adopt the enlarged cross-section thickening of reinforcing plate size to play the mesh of carrying out the reinforcement to first wall body from the outside, the turnover can be realized to external reinforcing plate, can avoid adopting the mode that increases the reinforcing bar in shear force wall inside to consolidate first wall body, and a lot of costs can be practiced thrift to the mode of external reinforcing plate reinforcing. On the other hand, the anti-pulling part is arranged in the second wall body of the shear wall, so that the anti-pulling effect is provided for the wall-attached embedded part, and the whole wall-attached embedded part can bear the larger acting force of the outer climbing tower crane.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a wall-attached embedded part of an external tower crane according to a first embodiment of the invention.
Fig. 2 is a schematic structural diagram of a wall-attached embedded part of the external tower climbing tower crane according to the first embodiment of the invention.
Fig. 3 is a schematic structural diagram of a shear wall according to a first embodiment of the present invention.
Fig. 4 is a cross-sectional view of a first end of a positioning panel of the first embodiment of the present invention.
Fig. 5 is a cross-sectional view of the second end of the positioning panel of the first embodiment of the present invention.
Fig. 6 is a schematic structural view of an anchor according to a second embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
First embodiment
The invention provides a wall-attached embedded part of an external tower climbing tower crane, which is used for being installed on a core tube shear wall 1. Specifically, referring to fig. 3, the shear wall 1 is a T-shaped wall, and the shear wall 1 includes a first wall body 11 and a second wall body 12. The first wall has opposite inner and outer sides. The second wall is connected to the inner side of the first wall 11 at an angle.
With continuing reference to fig. 1 to 5, the wall-attached embedded part of the external tower climbing tower crane of the invention comprises: positioning panel 2, reinforcing plate 3, wall penetrating member 4, anchoring member 5 and anti-pulling member 6.
Wherein, the positioning panel 2 is embedded in the outer side surface of the first wall 11. One end of the positioning panel is connected with the anchoring piece, and the other end of the positioning plate is connected with the wall penetrating piece. The position of one end of the positioning panel 2 corresponds to the position of the second wall 12. An ear plate 21 is attached to the outside of the positioning panel 2. The ear plate 21 is used for being connected to an outer tower climbing tower.
The reinforcing plate 3 is attached to the inner side of the first wall 11, and the position of the reinforcing plate 3 corresponds to the position of the other end of the positioning panel 2 far away from the second wall 12. The other ends of the reinforcing plate and the positioning panel are respectively arranged at the opposite positions of the inner side and the outer side of the first wall body.
The wall penetrating piece 4 is detachably arranged in the first wall body 11 in a penetrating way, and the wall penetrating piece 4 is tied at the other ends of the reinforcing plate 3 and the positioning panel 2.
According to the wall-attached embedded part of the external climbing tower crane, after the external climbing tower crane climbs, the positioning panel, the wall penetrating part, the anchoring part, the anti-pulling part and the reinforcing plate are respectively detached from the shear wall so as to be used for the shear wall on the upper part of the core barrel in a circulating manner. Along with the increase of a core section of thick bamboo height, the thickness of a core section of thick bamboo wall body diminishes gradually, when first wall body bearing capacity unsatisfied requirement through calculating, can adopt the enlarged cross-section thickening of reinforcing plate size to play the mesh of carrying out the reinforcement to first wall body from the outside, the turnover can be realized to external reinforcing plate, can avoid adopting the mode that increases the reinforcing bar in shear force wall inside to consolidate first wall body, and a lot of costs can be practiced thrift to the mode of external reinforcing plate reinforcing. On the other hand, the anti-pulling part is arranged in the second wall body of the shear wall, so that the anti-pulling effect is provided for the wall-attached embedded part, and the whole wall-attached embedded part can bear the larger acting force of the outer climbing tower crane.
When the shear wall is poured, a base plate is embedded in the mounting position of the positioning panel to reserve the mounting position of the positioning panel. The shape and the size of the pre-buried base plate are matched with those of the positioning panel. As shown in fig. 3, an accommodating groove for embedding the positioning panel is formed on the outer side of the first wall, and the accommodating groove is formed on the outer side surface of the first wall after the embedded backing plate is detached after the shear wall is demolded.
Referring to fig. 1 and 5, the number of the wall penetrating members 4 is plural. The plurality of wall penetrating members 4 are arranged along the height direction of the first wall body 11.
Specifically, the wall penetrating piece 4 is a through screw. One end of the positioning panel 2 is provided with a second through hole. The reinforcing plate 3 is provided with a third through hole. The two ends of the opposite-penetrating screw rod are respectively penetrated in the second through hole of the positioning panel and the third through hole of the reinforcing plate, extend to the outer side of the positioning panel and extend to the outer side of the reinforcing plate. Fastening nuts 41 are screwed to both ends of the through screw, respectively. The fastening nut 41 at one end of the opposite-penetrating screw is pressed against the outer side of one end of the positioning panel 2, and the fastening nut 41 at the other end of the opposite-penetrating screw is pressed against the outer side of the reinforcing plate 3.
In this embodiment, the head of the through screw presses against the outer side of one end of the positioning panel, and the fastening nut is screwed on one end of the screw of the through screw, which is far away from the head, and presses against the outer side of the reinforcing plate.
When the thickness of the shear wall becomes thinner, the first wall body is reinforced by the reinforcing plate with thicker thickness so as to improve the bearing capacity of the wall-attached embedded part of the external tower climbing tower crane.
When the first wall body of the shear wall is poured, a pore-forming sleeve is embedded in the first wall body 11. The hole-forming sleeve penetrates through the first wall body 11. After the hole-forming sleeve is removed, a through hole for the wall-penetrating member 4 to movably penetrate is formed in the first wall body 11. The wall penetrating piece is detachably arranged in the through hole in a penetrating mode.
In a preferred embodiment, the number of the anchoring elements 5 is a plurality, and the number of the anchoring elements is matched with the number of the wall penetrating members. The plurality of wall penetrating pieces and the plurality of anchoring pieces are arranged on two opposite sides of the ear plates in a one-to-one correspondence mode.
Specifically, in the present embodiment, as shown in fig. 4, a second threaded hole is formed in an end surface of one end of the anchor 5. The other end of the positioning panel 2 is provided with a first through hole. The first perforation of the positioning panel 2 is aligned with the second threaded hole of the anchor. The first through hole penetrates through the first bolt, and the first bolt is screwed in the second threaded hole of the anchoring piece.
The other end of the anchor 5 is formed with an external thread. The middle part of the pulling-resistant piece 6 is provided with a first threaded hole. The other end of the anchoring piece 5 is screwed in the first threaded hole of the anti-pulling piece 6. In this embodiment, the first shear wall is perpendicular to the second shear wall. The anti-pulling piece is arranged along the thickness direction of the second shearing force.
The anchor is a long bolt, a second threaded hole is formed in the head of the long bolt, and the second threaded hole and the long bolt are coaxially arranged. When the first wall body of the shear wall is poured, the head of the long bolt abuts against the embedded base plate. The outside of the anchor 5 and the uplift 6 are coated with an isolation membrane. The isolating film is a plastic film.
Six holes are respectively formed in the end faces of the two ends of the anchoring part 5 and the anti-pulling part 6, and when the wall-attached embedded part of the external tower crane is disassembled, the anchoring part and the anti-pulling part can be screwed out of the shear wall by a matched wrench, so that turnover can be realized. Due to the wrapping of the isolating membrane, the anchoring piece and the pulling-resistant piece can be screwed out of the shear wall in a labor-saving manner.
The invention discloses a construction method of a wall-attached embedded part of an external tower climbing tower crane, which comprises the following steps:
installing the embedded base plate on the inner side of the template of the first shear wall;
an isolation film (plastic film) is wrapped outside the anchoring piece and the anti-pulling piece;
one end of the anchoring piece is abutted against the embedded base plate, the anti-pulling piece is detachably connected to the other end of the anchoring piece, and two ends of the anti-pulling piece are abutted against between the two templates of the second wall body;
mounting a pore-forming sleeve at one end of the embedded base plate, which is far away from the anchoring piece, so that one end of the pore-forming sleeve abuts against the embedded base plate, and the other end of the pore-forming sleeve abuts against the other template of the first wall body;
pouring the first wall body and the second wall body to be solidified to form a shear wall;
after the shear wall is demoulded, the embedded base plate and the pore-forming sleeve are removed to form an accommodating groove and a through hole in the first wall body;
the through hole is penetrated with a wall penetrating piece, the inner side of the first wall body is provided with a reinforcing plate, the positioning panel is hoisted into the accommodating groove, one end of the positioning panel is detachably connected with the anchoring piece, the other end of the positioning panel is pulled and tied on the reinforcing plate through the wall penetrating piece, the tail end of a screw rod of the wall penetrating piece is screwed with a fastening nut to be pressed against the outer side of the reinforcing plate, and one end of the positioning panel is detachably arranged on the anchoring piece through a first bolt;
after climbing of the external climbing tower crane, the positioning panel, the wall penetrating piece, the anchoring piece, the anti-pulling piece and the reinforcing plate are respectively detached from the shear wall to be used in a turnover mode on the shear wall on the upper portion of the core barrel, wherein when the anchoring piece and the anti-pulling piece are detached, the anchoring piece is firstly screwed out of the anti-pulling piece and the first wall body, and then the anti-pulling piece is screwed out of the second wall body.
Second embodiment
Referring to fig. 6, the invention provides a wall-attached embedded part of an external tower climbing tower crane, which comprises a positioning panel 2, a reinforcing plate 3, a wall penetrating part 4, an anchoring part 5 and an anti-pulling part 6.
The invention provides a wall-attached embedded part of an external tower climbing tower crane, which is used for being installed on a core tube shear wall. Specifically, the shear wall is a T-shaped wall and comprises a first wall body and a second wall body. The first wall has opposite inner and outer sides. The second wall body is connected to the inner side of the first wall body at an angle.
The present embodiment differs from the first embodiment only in that: the shape of the anchor is otherwise the same as that of the first embodiment, and therefore, the description thereof is omitted.
In this embodiment, the anchor is a reducing long bolt, and specifically, the anchor includes a reducing section and a straight rod section. The reducing section has relative first end and second end, and the external diameter of reducing section reduces from the first end of reducing section to the second end of reducing section gradually, and reducing section second end external diameter is adapted in the external diameter of branch section. The strut section is coaxially connected to the second end of the reducer section.
One end of the reducer section is connected to the positioning panel in the same manner as the first embodiment. The end of the strut section remote from the reducer section is connected to the anti-pulling member in the same manner as the first embodiment.
The anchoring piece is arranged through the reducing section, on one hand, the bearing capacity of the wall-attached embedded part is enhanced, on the other hand, the wall-attached embedded part can be detached more labor-saving when the anchoring piece is detached, and the mounting and dismounting construction efficiency of the wall-attached embedded part is improved.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (8)
1. The utility model provides an outer tower crane of climbing attaches wall built-in fitting, its characterized in that attaches the wall built-in fitting and is used for the shear force wall, the shear force wall include first wall body and be the angle connect in the second wall body of the inboard of first wall body, attach the wall built-in fitting and include:
the positioning panel is embedded in the outer side face of the first wall body, the position of one end of the positioning panel corresponds to the position of the second wall body, and the outer side of the positioning panel is connected with an ear plate;
the reinforcing plate is attached to the inner side of the first wall body, and the position of the reinforcing plate corresponds to the position of the other end, far away from the second wall body, of the positioning panel;
the wall penetrating piece is detachably arranged in the first wall in a penetrating way and is pulled and tied at the other ends of the reinforcing plate and the positioning panel;
the anchoring piece is detachably embedded in the first wall body, one end of the anchoring piece is detachably connected to one end of the positioning panel, and the other end, far away from the positioning panel, of the anchoring piece extends into the second wall body; and
and the anti-pulling piece is arranged at an angle with the anchoring piece, is detachably embedded in the second wall body and is detachably connected to the other end of the anchoring piece, and the end part of the anti-pulling piece penetrates through the second wall body.
2. The wall-attached embedded part of the external tower climbing tower according to claim 1, wherein the number of the wall penetrating parts is multiple, and the multiple wall penetrating parts are arranged along the height direction of the first wall body.
3. The wall-attached embedded part of the external tower climbing tower crane according to claim 2, wherein the number of the anchoring parts is multiple.
4. The wall-attached embedded part of the externally climbing tower crane according to claim 1, wherein the anchoring part and the anti-pulling part are externally coated with an isolation film.
5. The wall-attached embedded part of the external tower crane according to claim 1, wherein a hole-forming sleeve is embedded in the first wall body, the hole-forming sleeve penetrates through the first wall body, and a through hole for the wall-penetrating part to movably penetrate is formed in the first wall body after the hole-forming sleeve is removed.
6. The wall-attached embedded part of the externally climbing tower crane according to claim 1, wherein an external thread is formed at the other end of the anchoring part, a first threaded hole is formed in the anti-pulling part, and the other end of the anchoring part is screwed in the first threaded hole of the anti-pulling part.
7. The wall-attached embedded part of the external tower climbing tower crane according to claim 6, wherein a second threaded hole is formed in an end face of one end of the anchoring member, a first through hole aligned with the second threaded hole is formed in the other end of the positioning panel, the first through hole is formed in the first bolt, and the first bolt is screwed in the second threaded hole.
8. The wall-attached embedded part of the external tower climbing tower crane according to claim 1, wherein the wall-penetrating part is a through screw, a second through hole is formed in one end of the positioning panel, a third through hole is formed in the reinforcing plate, two ends of the through screw are respectively penetrated through the second through hole and the third through hole, two ends of the through screw are respectively screwed with a fastening nut, the fastening nut at one end of the through screw is pressed against the outer side of one end of the positioning panel, and the fastening nut at the other end of the through screw is pressed against the outer side of the reinforcing plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110937062.5A CN113666279B (en) | 2021-08-16 | 2021-08-16 | Wall-attached embedded part of external climbing tower crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110937062.5A CN113666279B (en) | 2021-08-16 | 2021-08-16 | Wall-attached embedded part of external climbing tower crane |
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| CN113666279A true CN113666279A (en) | 2021-11-19 |
| CN113666279B CN113666279B (en) | 2023-11-21 |
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