Penetrating type lifting appliance of heavy prefabricated concrete stand column

Abstract

The utility model discloses a penetrating type lifting appliance for a heavy precast concrete stand column, which comprises a steel sleeve which is pre-buried and transversely penetrates through the concrete stand column, and the steel sleeve is sleeved with a steel lifting shaft; two steel protection plates are welded to the two ends of the steel sleeve respectively and are both pre-buried in the concrete stand column; two ends of the steel hanger shaft respectively extend out of the center holes of the two steel guard plates; the two ends of the steel lifting shaft are each provided with an expanding head, and each expanding head extends inwards into the opening of the steel sleeve from the end of the steel lifting shaft. And the rope sleeve of the traction rope sleeves the part of the expanded head extending out of the central hole of the steel guard plate. The lifting appliance can enable the lifting process to be firm, safe and stable.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete column hoisting construction, in particular to a through-type hoisting device for heavy prefabricated concrete columns with a tonnage of 240t or more. Background Art

[0002] At present, prefabricated concrete columns are mostly used in large buildings such as exhibition halls, stadiums, auditoriums, warehouses, and factories. The construction process is to tie the steel cage on the ground in advance and pour the horizontal concrete columns, and then hoist them vertically into place after they are dry and hard. The concrete columns of the above-mentioned large buildings are often huge in size and tonnage. Some columns are even as long as 38m, with a cross-sectional size of 1.5×1.5m and a tonnage of 240t. The traditional method of pre-embedded lifting rings in the columns or simply tying them with wire ropes and then lifting them obviously cannot meet the current hoisting needs of heavy prefabricated concrete columns.

[0003] Of course, some people in the industry have also proposed a through-type lifting solution, such as the application with application number 201710622237, which pre-buries a through-type casing in the concrete column, and passes a lifting shaft through the casing, and provides lifting ears and fastening flanges on both sides of the lifting shaft. The lifting ears are used to connect the traction rope and the fastening flange is locked to the end of the lifting shaft with bolts, in order to restrain the traction rope and prevent the traction rope from moving laterally away from the lifting shaft.

[0004] However, the structure of the above-mentioned hoist is simple and imperfect. During the actual hoisting process, the workers found that the hoist may be barely feasible for hoisting columns of conventional tonnage, but it cannot meet the hoisting requirements of heavy columns, especially 240t level, and there are a series of defects and hidden dangers. Specifically, during hoisting, the hoisting shaft will generate huge pressure on the concrete near the end of the casing, causing stress concentration effect in this part, resulting in the concrete in the end area of ​​the casing being prone to cracking and damage. Correspondingly, the end of the hoisting shaft is also subject to a large reaction force, which also causes stress concentration and the end of the hoisting shaft is prone to damage and damage. In addition, the traction rope is connected to the hoisting shaft through the lifting ear, but the lifting ear is thin and not firm, and there is a risk of breakage and falling during large-tonnage hoisting. Furthermore, the fastening flange at the end of the hoisting shaft is also thin and not strong enough. During large-tonnage hoisting, it is impossible to restrain the traction rope in the axial direction. The traction rope is easy to move axially, be squeezed and damaged, and pass over the fastening flange, resulting in detachment and falling. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a through-type hoisting device for heavy prefabricated concrete columns which can make the hoisting process firm, safe and stable.

[0006] The technical solution of the utility model is to provide a through-type hanger for heavy precast concrete columns, which includes a steel casing which is pre-buried and transversely penetrates the concrete column, and the steel casing is sleeved with a steel hanging shaft; two steel guard plates are respectively welded at both ends of the steel casing, and the two steel guard plates are pre-buried in the concrete column; the two ends of the steel hanging shaft respectively extend out of the center holes of the two steel guard plates; an enlarged head is respectively arranged at both ends of the steel hanging shaft, and each enlarged head extends inwardly from the end of the steel hanging shaft to the opening of the steel casing; the rope loop of the traction rope is sleeved on the part of the enlarged head extending out of the center hole of the steel guard plate.

[0007] Compared with the prior art, the through-type hanger for heavy precast concrete columns using the above structure has the following advantages.

[0008] Firstly, two steel guard plates are added at both ends of the steel casing, so as to strengthen and protect the original weak areas of the column and prevent the concrete in the end area of ​​the steel casing from being crushed and damaged; similarly, the two ends of the steel lifting shaft are the main parts that bear the load during lifting, so they are thickened to form enlarged heads, which effectively provides strength and firmness to this part and avoids damage due to stress concentration; furthermore, the traction rope is put on the end of the enlarged head, and the strength of this position is reliable and firm, avoiding the hidden danger of breakage and falling; in summary, the above-mentioned lifting equipment makes the lifting process safer, more stable and firm, which is enough to meet the needs of large-tonnage lifting.

[0009] Preferably, each enlarged head cover has an annular steel baffle plate, the outer surface of each annular steel baffle plate is connected to a steel end plate via multiple connecting rods, the steel end plate is abutted against the outer end surface of the enlarged head on the same side, and the steel end plate and the outer end surface of the enlarged head are connected via a fastening bolt; the annular steel baffle plate, connecting rod and steel end plate on the same side constitute an integral baffle block for restraining the outward movement of the traction rope; the above-mentioned integral baffle block has sufficient strength and provides a firm and stable axial limit for the rope loop of the traction rope, avoiding the lateral movement of the rope loop from detaching from the steel hanging shaft and preventing it from falling; moreover, the above-mentioned integral baffle block is a hollow structure, which itself has a certain elasticity, so that the constraint on the traction rope has toughness; what's more, the hollow structure has a light weight, which saves materials and reduces the cost while ensuring sufficient strength, and has a lighter weight, which is convenient for workers to manually disassemble after the lifting is completed.

[0010] As a further preference, each enlarged head is also fitted with a steel pad for separating the rope loop of the traction rope and the steel guard plate; each enlarged head is also fitted with a steel casing for separating the enlarged head and the rope loop of the traction rope, and the steel casing is located between the steel pad and the annular steel baffle; in this way, the steel pad protects the inner concrete column and the steel guard plate anchored in the column, and bears the wear caused by the rope loop lifting. Similarly, the steel casing separates and protects the steel lifting shaft, and also bears the wear caused by the rope loop lifting; moreover, the steel pad and steel casing are both consumable parts. Although they are easy to wear, they are easy to replace after wear, and the finished product is not expensive, which effectively protects more expensive or non-replaceable components such as columns, steel guard plates, steel lifting shafts, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a schematic structural diagram of a heavy prefabricated concrete column involved in the utility model when a steel cage is horizontally tied.

[0012] Figure 2 The utility model is a schematic diagram of the structure of the heavy prefabricated concrete column after the concrete is poured horizontally.

[0013] Figure 3 The utility model is a structural schematic diagram of a through-type hanger for a heavy precast concrete column.

[0014] Figure 4 The utility model is a half-section structural schematic diagram of a through-type hanger for a heavy precast concrete column.

[0015] Figure 5 The utility model is a structural schematic diagram after the traction rope, the fastening bolts, the integral stopper, the steel casing and the steel pad at one end of the sling are disassembled.

[0016] Figure 6 The utility model is a structural schematic diagram of a through-type hanger for a heavy precast concrete column after half-sectioning of the column, a steel casing and a steel guard plate.

[0017] As shown in the figure, 1. concrete column, 2. steel casing, 3. steel suspension shaft, 3.1. enlarged head, 4. steel guard plate, 5. traction rope, 5.1. rope loop, 6. annular steel baffle, 7. connecting rod, 8. steel end plate, 9. fastening bolt, 10. threaded blind hole, 11. steel pad, 12. steel casing. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1 to Figure 6 As shown, the through-type lifting device of the heavy precast concrete column 1 of the utility model comprises a steel casing 2 embedded in the concrete column 1, and the steel casing 2 penetrates the concrete column 1 in the horizontal direction, that is, the width direction of the concrete column 1. The column hoisted in this application is a heavy precast concrete column 1 of the 240t level. In order to meet the safe hoisting requirements of this tonnage, the lifting device of this application has made a series of targeted improvements.

[0020] A steel suspension shaft 3 is sleeved in the gap of each steel casing 2. Two steel guard plates 4 are welded at both ends of the steel casing 2, and both steel guard plates 4 are pre-buried in the concrete column 1; that is, each steel guard plate 4 is pre-buried in the concrete column 1 and the outer surface of the steel guard plate 4 is exposed on the left side or right side of the concrete column 1.

[0021] The two ends of the steel suspension shaft 3 extend out of the center holes of the two steel guard plates 4 respectively; an enlarged head 3.1 is provided at each end of the steel suspension shaft 3, and each enlarged head 3.1 extends inward from the end of the steel suspension shaft 3 to the opening of the steel casing 2; the rope loop 5.1 of the traction rope 5 is sleeved on the part of the enlarged head 3.1 extending out of the center hole of the steel guard plate 4. In other words, the part where the end of the steel suspension shaft 3 and the traction rope 5 fit together, as well as the part corresponding to the end of the steel suspension shaft 3 and the center hole of the steel guard plate 4, are all thickened for targeted reinforcement.

[0022] Each enlarged head 3.1 is covered with an annular steel baffle plate 6, and the outer surface of each annular steel baffle plate 6 is connected to a steel end plate 8 via a plurality of connecting rods 7. The annular steel baffle plate 6, connecting rods 7 and steel end plate 8 located on the same side of the steel suspension shaft 3 constitute an integral block for restraining the outward movement of the traction rope 5. The steel end plate 8 of the integral block abuts against the outer end surface of the enlarged head 3.1 on the same side; and the steel end plate 8 and the outer end surface of the enlarged head 3.1 are connected via a fastening bolt 9; the outer end surface of the enlarged head 3.1 is provided with a threaded blind hole 10, the rod of the fastening bolt 9 is screwed into the threaded blind hole 10, and the head of the fastening bolt 9 abuts against the steel end plate 8 inwardly so that the steel end plate 8 is tightly abutted against the enlarged head 3.1 on the same side.

[0023] Each enlarged head 3.1 is also fitted with a steel pad 11 for separating the rope loop 5.1 of the traction rope 5 and the steel guard plate 4; a steel casing 12 is provided between each enlarged head 3.1 and the rope loop 5.1 of the traction rope 5, and the steel casing 12 is also fitted on the enlarged head 3.1 and located between the steel pad 11 and the annular steel baffle 6.

Claims

1. A through-type hanger for a heavy precast concrete column, comprising a steel casing pre-buried and transversely penetrating the concrete column, the steel casing being sleeved with a steel hanging shaft; characterized in that: Two steel guard plates are welded at both ends of the steel casing, and both steel guard plates are embedded in the concrete column; both ends of the steel suspension shaft extend out of the center holes of the two steel guard plates; an enlarged head is provided at each end of the steel suspension shaft, and each enlarged head extends inward from the end of the steel suspension shaft to the opening of the steel casing; the rope loop of the traction rope is put on the part of the enlarged head extending out of the center hole of the steel guard plate.

2. The through-type hanger for heavy precast concrete columns according to claim 1 is characterized in that: Each enlarged head cover has an annular steel baffle plate, and the outer surface of each annular steel baffle plate is connected to a steel end plate via multiple connecting rods. The steel end plate is abutted against the outer end surface of the enlarged head on the same side, and the steel end plate and the outer end surface of the enlarged head are connected by a fastening bolt; the annular steel baffle plate, connecting rod and steel end plate on the same side form an integral baffle for restraining the outward movement of the traction rope.

3. The through-type hanger for heavy precast concrete columns according to claim 2, characterized in that: Each enlarged head is also fitted with a steel pad for separating the traction rope loop and the steel guard plate; each enlarged head is also fitted with a steel casing for separating the enlarged head and the traction rope loop, and the steel casing is located between the steel pad and the annular steel baffle.

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