CN212201218U - Drawknot fixing device for profile steel cantilever beam of outer cantilever frame - Google Patents

Abstract

The utility model discloses a drawknot fixing device of a section steel cantilever beam of an outer cantilever frame, which comprises a drawknot component fixed at the outer end of the section steel cantilever beam and a lock joint component fixed at the inner end of the section steel cantilever beam; the drawknot component comprises a U-shaped anchor ring and a steel cable, the upper end of the steel cable is connected with the arc section of the U-shaped anchor ring, and the lower end of the steel cable is connected with the outer end of the section steel cantilever beam; the tie assembly further comprises two plastic sleeves which are pre-embedded and penetrate through the floor boundary beam of the upper floor slab, two straight sections of the U-shaped anchor ring penetrate through the two plastic sleeves from outside to inside, and an external thread section at the inner end of each straight section is sleeved with a flat iron base plate and is screwed with a screw cap. The device need not gas cutting, but cyclic utilization can reduce the consumptive material volume.

Description

Drawknot fixing device for profile steel cantilever beam of outer cantilever frame

Technical Field

The utility model relates to a high-rise building in civil engineering chooses formula scaffold frame construction technical field outward, specifically says so a device that is used for drawknot fixed shaped steel outrigger to choose formula scaffold frame outward with the supporting.

Background

When a high-rise building is constructed, an outward-projecting scaffold, namely an outward-projecting scaffold, needs to be installed. The installation process is approximately that a section steel cantilever beam is fixed on a lower floor slab, and then a steel pipe fastener type scaffold is erected on the section steel cantilever beam. The main load of the scaffold is borne by the section steel cantilever beam, so that the section steel cantilever beam is ensured to be firmly and reliably installed.

The installation and fixing structure of the section steel cantilever beam in the prior art is divided into two parts, one is the fixation of the outer end of the section steel cantilever beam, namely, a rough reinforcement is cold-bent into a U-shaped anchor ring and is embedded in a floor boundary beam at the outer edge of an upper floor, concretely, a hole is drilled on a floor boundary beam side template, a straight section of the U-shaped anchor ring is inserted into the side template from a hole opening, thus floor boundary beam concrete is cast and hardened, the side template is removed, the straight section of the U-shaped anchor ring is anchored in the floor boundary beam concrete, a circular section of the U-shaped anchor ring protrudes out of the floor boundary beam, and then a guy cable is installed to ensure that two ends of the guy cable are fixedly connected with the U-shaped anchor ring and a pull ring at the outer end of the section steel; and secondly, fixing the inner end of the section steel cantilever beam, namely embedding a plurality of n-shaped stirrups on a lower floor slab for placing the section steel cantilever beam, wherein the n-shaped stirrups are also made of thick steel bars through cold bending, and the inner end of the section steel cantilever beam is sleeved in the plurality of n-shaped stirrups and is fastened and fixed.

The installation and fixation structure of the section steel cantilever beam in the prior art has the following defects: firstly, analyzing a fixed structure of the outer end of the section steel cantilever beam, firstly, after the construction is finished and the section steel cantilever beam and the outer cantilever frame are dismantled, the straight section of the U-shaped anchor ring is anchored in the floor side beam concrete and cannot be dismantled, thus waste is caused; the arc section exposed outside the floor boundary beam is obstructed in view and needs to be cut off by gas cutting, and the gas cutting is generally operated by a worker standing in a hanging basket, belongs to air operation, has high operation difficulty, and often causes safety accidents such as fire and the like if the worker carelessly operates; moreover, the U-shaped anchor ring is arranged on the side part of the floor boundary beam, so that holes need to be drilled on the side template, the side template is permanently damaged, the side template is scrapped after being used once, and the material consumption is further increased; the fixed structure of the inner end of the section steel cantilever beam also has the defects that the n-shaped stirrups anchored in the bottom plate concrete cannot be completely removed and only the outer convex part can be subjected to gas cutting, and although the gas cutting of the n-shaped stirrups is carried out on the floor plate, the operation is relatively convenient, the n-shaped stirrups cannot be recycled, so that the material consumption is large and the problem of being uneconomical is also caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a need not the gas cutting, but cyclic utilization can reduce the drawknot fixing device of shaped steel outrigger of the outer outrigger of consumptive material volume.

The technical solution of the utility model is to provide a drawknot fixing device of a section steel cantilever beam of an outer cantilever frame, which comprises a drawknot component fixed at the outer end of the section steel cantilever beam and a lock joint component fixed at the inner end of the section steel cantilever beam;

the drawknot component comprises a U-shaped anchor ring and a steel cable, the upper end of the steel cable is connected with the arc section of the U-shaped anchor ring, and the lower end of the steel cable is connected with the outer end of the section steel cantilever beam; the tie assembly also comprises two plastic sleeves which are pre-embedded and penetrate through the floor boundary beam of the upper floor slab, two straight sections of the U-shaped anchor ring penetrate through the two plastic sleeves from outside to inside, the inner end of each straight section is an external thread section, and each external thread section is sleeved with a flat iron base plate and screwed with a screw cap;

two groups of limiting nails are inserted into the inner surface of one side template of the floor boundary beam for pouring the upper floor, and each group is a left limiting nail and a right limiting nail for clamping one end of a plastic sleeve from the left side and the right side; and the inner surface of the other side template of the floor boundary beam is also inserted with two groups of limit nails, and each group is an upper limit nail and a lower limit nail which are used for clamping the other end of the plastic sleeve from the upper side and the lower side.

Compared with the prior art, the drawknot fixing device of the profile steel cantilever beam of the outer cantilever frame with the structure has the following advantages.

Firstly, after construction is finished and the section steel outriggers and the outer outriggers are dismantled, the screw caps are unscrewed, so that the U-shaped anchor rings can be easily dismantled, the dismantling process is easy and quick, the labor cost is low, and compared with the high-altitude gas cutting in the prior art, the dismantling process does not need fire operation and has no potential safety hazard; the disassembled U-shaped anchor ring is complete and free of damage, can be circularly recycled for multiple use, and the cost of the plastic sleeve and the limit nail retained in the boundary beam is very low, so that the scheme has the advantages of obviously reduced material consumption and good economy; moreover, one end of each plastic sleeve is clamped from the X direction to the left and the right direction and the other end of each plastic sleeve is clamped from the Y direction to the up and down direction through the inserting limiting nails, the temporary fixing problem of the plastic sleeves and the side templates before the floor boundary beam is poured is quickly and conveniently realized, the removed side templates only have a plurality of small nail holes after the boundary beam is poured, the templates are basically not damaged, the templates can be recycled, and the permanent damage caused by punching holes like the prior art is avoided, so the economic benefit of the floor boundary beam is further enhanced.

Preferably, the fastening assembly comprises two steel pressing plates which are arranged at the middle section and the inner end of the section steel cantilever beam in a separated mode, two bolt holes are formed in two ends of each steel pressing plate, a fastening bolt penetrates through each bolt hole, four internal thread steel sleeves which correspond to the four fastening bolts one by one are pre-embedded in a lower floor slab for placing the section steel cantilever beam, and the lower end of each fastening bolt is screwed in the corresponding internal thread steel sleeve; therefore, the fastening bolt and the steel pressing plate with higher cost can be completely and nondestructively disassembled after the outer outrigger is disassembled for recycling, the cost of the internal thread steel sleeve detained in the concrete of the lower floor slab is obviously reduced compared with the cost of the n-shaped stirrup scrapped by gas cutting, and the disassembling process only needs to unscrew the fastening bolt, so the operation is convenient and fast, and the labor is saved; especially, the fastening bolt, the steel clamp plate and the internal thread steel sleeve that this subassembly adopted intensity is bigger, and fixed effect is more firm, so only need lay the twice at shaped steel outrigger middle section back end can, compare prior art's multichannel n shape stirrup, the dismouting is obviously more succinct high-efficient.

As a further preference, the flat iron backing plate is spot-welded with an additional steel bar for resisting the screw cap and preventing the screw cap from slipping; therefore, the nut and the external thread section of the U-shaped anchor ring can be effectively prevented from slipping and losing efficacy, the additional steel bar is convenient to disassemble and assemble, the nut and the external thread section of the U-shaped anchor ring only need to be spot-welded during assembling and knocked off during disassembling, the labor intensity is not high, and the fastening effect is good.

Drawings

Fig. 1 is a front view structure schematic diagram of the drawknot fixing device of the profile steel cantilever beam of the outer cantilever frame of the utility model.

Fig. 2 is a front cross-sectional structural schematic view of the drawknot fixing device drawknot component of the profile steel cantilever beam of the outer cantilever frame.

Fig. 3 is the sectional structure of bowing schematic view of the drawknot component of the section steel cantilever of the outer outrigger of the utility model.

Fig. 4 is a schematic front sectional view of the plastic sleeve of the drawknot fixing device of the profile steel cantilever of the outer cantilever of the utility model when temporarily fixing before pouring.

Fig. 5 is a schematic view of the local structure of the flat iron pad plate of the drawknot fixing device of the steel cantilever of the outer cantilever of the utility model.

Fig. 6 is a schematic view of the fastening assembly of the knot fixing device for the section steel cantilever of the outer cantilever according to the present invention.

The steel plate comprises a steel cantilever beam 1, a steel cantilever beam 2, a U-shaped anchor ring 2.1, an arc section 2.2, a straight section 2.3, an external thread section 3, a steel cable 4, an upper floor slab 5, a floor edge beam 6, a plastic sleeve 7, a flat iron base plate 8, a nut 9, a side template 10, a limiting nail 11, a steel pressing plate 12, a fastening bolt 13, an internal thread steel sleeve 14, an additional steel bar 15, a buckle 16 and a hanging ring.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

As shown in fig. 1-6, the utility model discloses a drawknot fixing device of shaped steel outrigger of outer outrigger, it includes the fixed drawknot subassembly of 1 outer end of shaped steel outrigger and the fixed lock joint subassembly of 1 inner of shaped steel outrigger.

The drawknot component comprises a U-shaped anchor ring 2 and a steel cable 3, the upper end of the steel cable 3 is connected with a circular arc section 2.1 of the U-shaped anchor ring 2 through three buckles 15, and the lower end of the steel cable 3 is connected with a hanging ring 16 at the outer end of the section steel cantilever beam 1 through three buckles 15. The tie assembly also comprises two plastic sleeves 6 such as PVC sleeves which are pre-embedded and penetrate through the floor boundary beam 5 of the upper floor slab 4, two straight sections 2.2 of the U-shaped anchor ring 2 penetrate through the two plastic sleeves 6 from outside to inside, the inner end of each straight section 2.2 is an external threaded section 2.3, and a flat iron base plate 7 is sleeved on each external threaded section 2.3 and a screw cap 8 is screwed; additional steel bars 14 are spot welded to the flat iron backing plate 7 to prevent slipping against the nuts 8. In other words, after the nut 8 is screwed, the worker spot-welds the additional steel bar 14 to the flat iron backing plate 7 to tightly hold the additional steel bar 14 to the nut 8, thereby preventing the additional steel bar from slipping.

Two groups of limiting nails 10 are inserted into the inner surface of one side template 9 of the floor boundary beam 5 for pouring the upper floor 4, and each group is provided with a left limiting nail 10 and a right limiting nail 10 which are used for clamping one end of the plastic sleeve 6 from the left side and the right side; and the inner surface of the other side template 9 of the floor boundary beam 5 is also inserted with two groups of limit nails 10, and each group is an upper limit nail 10 and a lower limit nail 10 which are used for clamping the other end of the plastic sleeve 6 from the upper side and the lower side. In popular terms, 4 groups of eight limit nails 10 are arranged on the two side templates 9 for temporarily clamping the two plastic sleeves 6 before casting.

The fastening assembly comprises two steel pressing plates 11 which respectively press the middle section and the inner end of the section steel cantilever beam 1, two bolt holes are formed in two ends of each steel pressing plate 11, a fastening bolt 12 penetrates through each bolt hole, four internal thread steel sleeves 13 which correspond to the four fastening bolts 12 one by one are pre-embedded in a lower floor slab for placing the section steel cantilever beam 1, and the lower end of each fastening bolt 12 is screwed in the corresponding internal thread steel sleeve 13.

Claims (3)

1. A drawknot fixing device of a section steel cantilever beam of an cantilever frame comprises a drawknot component fixed at the outer end of the section steel cantilever beam (1) and a fastening component fixed at the inner end of the section steel cantilever beam (1);

the drawknot component comprises a U-shaped anchor ring (2) and a steel cable (3), the upper end of the steel cable (3) is connected with the arc section (2.1) of the U-shaped anchor ring (2), and the lower end of the steel cable (3) is connected with the outer end of the section steel cantilever beam (1); the method is characterized in that: the tie component also comprises two plastic sleeves (6) which are pre-embedded and penetrate through the floor boundary beam (5) of the upper floor (4), two straight sections (2.2) of the U-shaped anchor ring (2) penetrate through the two plastic sleeves (6) from outside to inside, the inner end of each straight section (2.2) is an external threaded section (2.3), and each external threaded section (2.3) is sleeved with a flat iron base plate (7) and screwed with a nut (8);

two groups of limiting nails (10) are inserted into the inner surface of one side template (9) of a floor boundary beam (5) for pouring an upper floor (4), and each group comprises a left limiting nail and a right limiting nail (10) for clamping one end of a plastic sleeve (6) from the left side and the right side; and the inner surface of the other side template (9) of the floor boundary beam (5) is also inserted with two groups of limit nails (10), and each group is an upper limit nail and a lower limit nail (10) which are used for clamping the other end of the plastic sleeve (6) from the upper side and the lower side.

2. The tension fixing device for the section steel cantilever beam of the cantilever according to claim 1, wherein: the fastening assembly comprises a middle section of the split section steel cantilever beam (1) and two steel pressing plates (11) at the inner end, two bolt holes are formed in two ends of each steel pressing plate (11), a fastening bolt (12) penetrates through each bolt hole, four internal thread steel sleeves (13) corresponding to the four fastening bolts (12) one by one are pre-embedded in a lower floor slab for placing the section steel cantilever beam (1), and the lower end of each fastening bolt (12) is screwed in the corresponding internal thread steel sleeve (13).

3. The tension fixing device for the section steel cantilever beam of the cantilever according to claim 1, wherein: an additional steel bar (14) for resisting the screw cap (8) and preventing the screw cap from slipping is fixed on the flat iron backing plate (7) in a spot welding mode.

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