A recyclable lifting device structure for lowering steel bar cage and its use method

Abstract

The present invention discloses a recyclable hanger structure for lowering a steel cage and a method for using the same, comprising a steel section hanger and a starter rod, a fixed shaft is welded to the bottom of the steel section hanger, a connecting piece is installed on the fixed shaft through two sets of shaft sleeves, a steel plate hook is welded to the connecting piece, the starter rod passes through the steel groove of the steel section hanger, the upper end of the starter rod passes through the steel section hanger and is provided with a handle, a limiting rod sleeve is provided in the steel groove and on the upper edge of the steel plate hook, a stop sleeve is welded to the lower edge of the steel plate hook, the upper and lower end surfaces of the limiting rod sleeve are wide, and a limiting narrow opening is provided inside the limiting rod sleeve for the starter rod to pass through. The present invention discloses a recyclable hanger structure for lowering a steel cage and a method for using the same, the hanger replaces the round steel hanger for lowering the steel cage, can be recycled, is easy to install and disassemble, greatly reduces the cost of measures for the project, is suitable for different working conditions, and brings better prospects for use.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a recyclable hanger structure for lowering a steel bar cage and a use method thereof. Background Art

[0002] my country is a country with a large number of bridges. The types of bridge foundations can be divided into: open excavation foundation, pile foundation, caisson foundation, caisson foundation, pipe column foundation, etc., with high bearing capacity. On-site cast-in-place piles are convenient to construct, with a short construction period and low cost. There is no vibration, no ground uplift or lateral displacement during construction, little harm to surrounding buildings, a wide range of use, and they are suitable for various geological conditions. At the same time, concrete pile foundations are also mostly used in urban foundation pit cofferdam construction. Therefore, cast-in-place piles are the preferred load-bearing structure form for engineering design personnel. First, holes are drilled on the construction site for cast-in-place piles. When the required depth is reached, steel bars are placed in the poured concrete. Because bored piles are mostly buried under the ground, the pile foundation platform is higher than the pile head elevation during construction. Deep-water pile foundations are mostly constructed using steel platforms, and the pile foundations are buried deeper. During the construction of the pile foundation, the steel cage is lowered, and most of them are completed using disposable round steel. The round steel cannot be reused, and it is also troublesome to take it out. In addition, there are many pile foundations belonging to the bridge, and the waste of round steel is serious, which increases the construction cost. For this reason, we propose a recyclable hanger structure for lowering the steel cage and its use method. Summary of the invention

[0003] The main purpose of the present invention is to provide a recyclable hanger structure for lowering a steel cage and a use method thereof, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A sling structure for lowering a steel cage that can be recycled comprises a steel section hanger rod and a starting rod, a fixed shaft is welded to the bottom of the steel section hanger rod, a connecting piece is installed on the fixed shaft through two sets of shaft sleeves, a steel plate hook is welded to the connecting piece, the starting rod passes through the steel groove of the steel section hanger rod, the upper end of the starting rod passes through the steel section hanger rod and is provided with a handle, a limiting rod sleeve is arranged in the steel groove and on the upper edge of the steel plate hook, a stop sleeve is welded to the lower edge of the steel plate hook, the upper and lower end surfaces of the limiting rod sleeve are both wide mouths, a limiting narrow mouth is provided inside the limiting rod sleeve for the starting rod to pass through, and the positions where the wide mouth and the narrow mouth are connected are evenly distributed around the periphery. There are several groups of side pulleys, and a rope hole is opened on the rear side of the steel plate hook for fixing the wire rope. A first wheel frame is welded on the rear side of the steel section hanger near the bottom, and a first guide wheel acting on the wire rope is installed in the first wheel frame. A second wheel frame is welded through the inner side of the rear part of the steel section hanger, and a second guide wheel acting on the wire rope is installed in the second wheel frame. The upper end of the wire rope is fixed on the starting rod, and a combing hook is arranged on the wire rope between the starting rod and the second guide wheel. The combing hook is connected to the inner wall of the steel section hanger through a tensioning spring, and a load-bearing hook is welded on the top of the rear side of the steel section hanger.

[0006] Preferably, the two groups of shaft sleeves are symmetrically sleeved on the two ends of the fixed shaft and rotate around the fixed shaft.

[0007] Preferably, a plurality of groups of limit rod sleeves are arranged in the steel groove, which are on the same vertical line as the limit rod sleeves and the stop sleeves on the steel plate hooks, and a stop block acting on the lower end of the starting rod is arranged inside the stop sleeve.

[0008] Preferably, the steel wire rope is tied to the rope hole, passes through the outer side of the first guide wheel and the inner side of the second guide wheel in sequence, and is tied to the starting rod.

[0009] At the steel cage transportation construction site, a crane of corresponding tonnage is used to lift the steel cage for lowering. The lifting points are set at the top layer of stiffening hoops of each steel cage, symmetrically arranged, with a total of 2-4 lifting points. When the first steel cage is lowered to the last reinforcement, the channel steel is passed through the steel cage and placed on the sleeper. Then the second steel cage is lifted and welded to it, and the reinforcement channel steel is pulled out. All the steel cage lowering work is completed in sequence. When it is lowered to the reinforcement of the last steel cage, the channel steel is also passed through the steel cage and placed on the casing. At this time, the circulating hoist is installed, and the crane is hung on the load-bearing hook. Another steel cage on the hoist is installed. The head steel plate hook is installed at the top layer of reinforcing hoop of the steel cage, and then the starting rod is inserted into the stop sleeve of the steel plate hook, the lifting device is lifted, the steel cage is lifted, the shoulder pole channel steel is pulled out, and the steel cage is lowered. When the steel cage is lowered to the designated position, the positive position is checked. After meeting the requirements, the load-bearing hook on the lifting device is hung on the steel casing. After the pile foundation concrete is poured, before the concrete has initially set, the starting rod is pulled upward. When the starting rod is lifted upward, it drives the steel plate hook to rotate, and the steel plate hook is thus separated from the reinforcing hoop steel bars of the steel cage. Then the load-bearing hook is lifted to complete the lifting and removal of the lifting device. After the lifting device is flushed, it is recycled for use in the next pile foundation.

[0010] The present invention provides a recyclable hanger structure for lowering a steel bar cage and a method for using the same, which has the following significant improvements and advantages compared to the prior art:

[0011] (1) This sling replaces the round steel sling under the steel cage, can be recycled, is easy to install and disassemble, and greatly reduces the cost of measures for the project.

[0012] (2) Add a side pulley to the limit rod sleeve, because the starting rod is prone to rust and partial deformation, and is easy to get stuck when inserted. This is used to improve the agility of the starting rod and facilitate its insertion.

[0013] (3) The combing hook is hung on the wire rope to restrain its displacement. It plays a combing role when the wire rope is loose, preventing the wire rope from shaking over a large range and being damaged by friction, and also preventing it from being entangled. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 is an internal view of the present invention;

[0016] Figure 3 It is an internal view of the limiting rod sleeve of the present invention.

[0017] In the figure: 1. Steel suspension rod; 2. Fixed shaft; 3. Connecting plate; 4. Bushing; 5. Steel plate hook; 6. Starting rod; 7. Steel groove; 8. Handle; 9. Limit rod sleeve; 10. Stop sleeve; 11. Wide mouth; 12. Narrow mouth; 13. Side pulley; 14. Rope hole; 15. Wire rope; 16. First wheel frame; 17. First guide wheel; 18. Second wheel frame; 19. Second guide wheel; 20. Tensioning spring; 21. Combing hook; 22. Load-bearing hook. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1-3 As shown, a structure of a recyclable hanger for lowering a steel cage and a method of using the hanger include a steel section hanger rod 1 and a starter rod 6. A fixed shaft 2 is welded to the bottom of the steel section hanger rod 1. A connecting piece 3 is installed on the fixed shaft 2 through two sets of shaft sleeves 4. A steel plate hook 5 is welded to the connecting piece 3. The starter rod 6 passes through a steel groove 7 of the steel section hanger rod 1. A handle 8 is provided on the upper end of the starter rod 6 through the steel section hanger rod 1. A limit rod sleeve 9 is provided in the steel groove 7 and on the upper edge of the steel plate hook 5. A stop sleeve 10 is welded to the lower edge of the steel plate hook 5. The upper and lower end surfaces of the limit rod sleeve 9 are both wide mouths 11. A limit narrow mouth 12 is provided inside the limit rod sleeve 9 for the starter rod 6 to pass through. A plurality of limit rod sleeves 11 and 12 are evenly distributed around the connection position. A rope hole 14 is provided on the rear side of the steel plate hook 5 for fixing the steel wire rope 15. A first wheel frame 16 is welded near the bottom of the rear side of the steel suspension rod 1. A first guide wheel 17 acting on the steel wire rope 15 is installed in the first wheel frame 16. A second wheel frame 18 is welded through the inner side of the rear part of the steel suspension rod 1. A second guide wheel 19 acting on the steel wire rope 15 is installed in the second wheel frame 18. The upper end of the steel wire rope 15 is fixed on the starting rod 6. A combing hook 21 is provided on the steel wire rope 15 between the starting rod 6 and the second guide wheel 19. The combing hook 21 is connected to the inner wall of the steel suspension rod 1 through a tensioning spring 20. A load-bearing hook 22 is welded on the top of the rear side of the steel suspension rod 11;

[0020] Two groups of shaft sleeves 4 are symmetrically sleeved on both ends of the fixed shaft 2 and rotate around the fixed shaft 2; a plurality of groups of limit rod sleeves 9 are arranged in the steel groove 7, and are on the same vertical line as the limit rod sleeves 9 and the stop sleeves 10 on the steel plate hook 5, and a stop block acting on the lower end of the starting rod 6 is arranged inside the stop sleeve 10; the steel wire rope 15 is tied to the rope hole 14, passes through the outer side of the first guide wheel 17 and the inner side of the second guide wheel 19 in sequence, and is tied to the starting rod 6.

[0021] The load-bearing hook 22 is welded with the steel suspension rod 1 and is used to lift the steel cage, which is hung on the steel casing or on the load-bearing beam of the steel cage; the steel suspension rod 1 is welded with the load-bearing hook 22 and connected to the fixed shaft 2, which belongs to the load-bearing suspension rod. The length is determined according to the depth of the pile foundation reinforcement from the top of the casing, and the size of the steel is calculated according to the lifting weight; the steel plate hook 5 is connected to the rotating shaft structure and is mainly hung on the upper reinforcement ring of the steel cage; the starting rod 6 is located on one side of the steel, the length runs through the entire sling, and is worn on the stop sleeve 10 provided on the steel plate hook 5, and acts on two points, one to ensure that the steel plate hook 5 and the reinforcement ring of the steel cage do not fall off, and the other is connected to the steel wire 15 to drive the steel plate hook 5 to rotate around the fixed shaft 2; one end of the steel wire rope 15 is connected to the starting rod 6 at an appropriate position, and is connected to the steel plate hook 5 by setting two steering pulleys between the openings of the steel section, and the steel plate hook 5 is driven to rotate following the start.

[0022] At the steel cage transportation construction site, a crane of corresponding tonnage is used to lift the steel cage for lowering. The lifting points are set at the top layer of stiffening hoops of each steel cage, symmetrically arranged, with a total of 2-4 lifting points. When the first steel cage is lowered to the last reinforcement, the channel steel is passed through the steel cage and placed on the sleeper. Then the second steel cage is lifted and welded to it, and the reinforcement channel steel is pulled out. All the steel cage lowering work is completed in sequence. When it is lowered to the reinforcement of the last steel cage, the channel steel is also passed through the steel cage and placed on the casing. At this time, the circulating hoist is installed, and the crane is hung on the load-bearing hook 22. The steel plate hook 5 at the other end of the hoist is installed Install it at the top layer of reinforcing hoop of the steel cage, then insert the starting rod 6 into the stop sleeve 10 of the steel plate hook 5, lift the sling, lift the steel cage, pull out the shoulder pole channel steel, lower the steel cage, and when the steel cage is lowered to the designated position, perform a positive position check. After meeting the requirements, the load-bearing hook 22 on the sling is hung on the steel casing. After the pile foundation concrete is poured, before the concrete has initially set, pull the starting rod 6 upward. When the starting rod 6 is lifted upward, it drives the steel plate hook 5 to rotate, and the steel plate hook 5 is thereby separated from the reinforcing hoop steel bars of the steel cage. Then lift the load-bearing hook 22 to complete the lifting and removal of the sling, and after the sling is flushed, it is recycled for use in the next pile foundation.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A recyclable hanger structure for lowering steel cage, characterized by: The invention comprises a steel suspension rod (1) and a starting rod (6), wherein a fixed shaft (2) is welded at the bottom of the steel suspension rod (1), a connecting piece (3) is installed on the fixed shaft (2) through two sets of shaft sleeves (4), a steel plate hook (5) is welded on the connecting piece (3), the starting rod (6) passes through a steel groove (7) of the steel suspension rod (1), the upper end of the starting rod (6) passes through the steel suspension rod (1) and is provided with a handle (8), a limiting rod sleeve (9) is provided inside the steel groove (7) and on the upper edge of the steel plate hook (5), a stop sleeve (10) is welded on the lower edge of the steel plate hook (5), the upper and lower end surfaces of the limiting rod sleeve (9) are both wide openings (11), a limiting narrow opening (12) is provided inside the limiting rod sleeve (9) for the starting rod (6) to pass through, and a plurality of sets of side pulleys (13) are evenly distributed around the position where the wide opening (11) and the narrow opening (12) are connected. A rope hole (14) is provided on the rear side of the steel plate hook (5) for fixing the steel wire rope (15); a first wheel frame (16) is welded to the rear side of the steel section boom (1) near the bottom, and a first guide wheel (17) acting on the steel wire rope (15) is installed in the first wheel frame (16); a second wheel frame (18) is welded through the inner side of the rear part of the steel section boom (1), and a second guide wheel (19) acting on the steel wire rope (15) is installed in the second wheel frame (18); the upper end of the steel wire rope (15) is fixed to the starting rod (6); a combing hook (21) is provided on the steel wire rope (15) between the starting rod (6) and the second guide wheel (19), and the combing hook (21) is connected to the inner wall of the steel section boom (1) through a tensioning spring (20); a load-bearing hook (22) is welded to the top of the rear side of the steel section boom (11).

2. The structure of the recyclable hanger for lowering the steel bar cage according to claim 1 is characterized by: The two groups of shaft sleeves (4) are symmetrically sleeved on the two ends of the fixed shaft (2) and rotate around the fixed shaft (2).

3. The structure of the recyclable hanger for lowering the steel bar cage according to claim 2 is characterized by: A plurality of groups of limit rod sleeves (9) are arranged in the steel groove (7), and the limit rod sleeves (9) and the stop sleeve (10) on the steel plate hook (5) are all on the same vertical line. A stop block is arranged inside the stop sleeve (10) to act on the lower end of the starting rod (6).

4. The structure of the recyclable hanger for lowering the steel bar cage according to claim 3 is characterized by: The steel wire rope (15) is tied to the rope hole (14), passes through the outer side of the first guide wheel (17), the inner side of the second guide wheel (19) in sequence, and is tied to the starting rod (6).

5. A method for using a recyclable hanger structure for lowering a steel bar cage, applied to the recyclable hanger structure for lowering a steel bar cage as claimed in any one of claims 1 to 4, characterized in that: At the construction site of the steel cage transportation, a crane of corresponding tonnage is used to lift the steel cage and lower it. The lifting points are set at the top layer of reinforcing hoops of each steel cage, and are arranged symmetrically, with a total of 2-4 lifting points. When the first steel cage is lowered to the last reinforcement bar, a channel steel is passed through the steel cage and placed on the sleeper. Then the second steel cage is lifted and welded to it, and the reinforcement channel steel is pulled out. All the steel cage lowering work is completed in sequence. When it is lowered to the reinforcement bar of the last steel cage, a channel steel is also passed through the steel cage and placed on the casing. At this time, the circular lifting device is installed. The crane is hung on the load-bearing hook (22), and the other end of the steel plate hook (5) on the lifting device is installed on the top of the steel cage. At the first layer of reinforcing hoops, the starting rod (6) is inserted into the stop sleeve (10) of the steel plate hook (5), the lifting device is lifted, the steel cage is lifted, the shoulder pole channel steel is pulled out, and the steel cage is lowered. When the steel cage is lowered to the designated position, the positive position is checked. After the requirements are met, the load-bearing hook (22) on the lifting device is hung on the steel casing. After the pile foundation concrete is poured, before the concrete has initially set, the starting rod (6) is pulled upward. When the starting rod (6) is lifted upward, the steel plate hook (5) is driven to rotate, so that the steel plate hook (5) is separated from the reinforcing hoop steel bars of the steel cage. The load-bearing hook (22) is lifted again to complete the lifting of the lifting device. After the lifting device is flushed, it is recycled for use in the next pile foundation.

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