A support device for cantilever construction of large-span steel structures

Abstract

The present invention belongs to the technical field of building construction support, and in particular, relates to a support device for cantilever construction of large-span steel structures, including a base, a support steel column is fixedly installed on the end face of the base, a mounting hole is provided inside the support steel column, and a jack is fixedly installed inside the mounting hole, and the output end of the jack is fixedly connected to a support seat, the support seat is in the shape of an inverted cone, the end of the support seat is fixedly connected to a top seat, the end face of the top seat is provided with a groove, and a movable seat is slidably connected inside the groove, and a plurality of magnetic blocks are fixedly embedded at the lower end of the movable seat. The present invention can ensure stable support for the cantilever beam, and can perform downward pressure buffering on the cantilever beam when the force is uneven, thereby reducing the possibility of support failure and stability failure caused by direct uneven force distribution, and can prevent particulate impurities and the like from affecting the stability of the support, and has high structural stability.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction support, and in particular relates to a support device for cantilever construction of a large-span steel structure. Background Art

[0002] Due to the high strength of steel, steel columns are widely used in the construction industry, especially in large-span or super-high buildings. In order to ensure the stability of the steel structure cantilever during construction, the cantilever needs to be supported to facilitate manual welding, assembly and other operations on the cantilever.

[0003] At present, in order to improve the problem of many nodes and weak strength on the supporting device of the traditional supporting steel structure cantilever, the current supporting device generally increases rods and reduces the nodes of the supporting device. For example, the patent publication number CN213449155U discloses a steel structure supporting beam for construction, which can improve the supporting stability of the steel structure cantilever;

[0004] However, the overall height of the existing support device cannot be adjusted. When supporting a large-span steel structure cantilever beam, it is impossible to ensure that the support point of the cantilever beam is in a suitable position. Although there are support devices with adjustable height, when supporting a large-span steel structure cantilever beam, due to the large span of the cantilever beam, after splicing, the overall pressure of multiple cantilever beams will be distributed to each support device. If some support devices are subjected to large forces due to uneven force, the force burden on the adjustment mechanism of the support device is large. Once the adjustment mechanism fails, there is a high possibility that the support will fail, which is not conducive to the support and use of the steel structure cantilever beam. To this end, we propose a support device for large-span steel structure cantilever construction to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a support device for cantilever construction of a large-span steel structure in view of the above-mentioned problems.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a supporting device for cantilever construction of large-span steel structure, comprising a base, a supporting steel column is fixedly installed on the end face of the base, a mounting hole is opened inside the supporting steel column, and a jack is fixedly installed inside the mounting hole, and the output end of the jack is fixedly connected to a supporting seat, the supporting seat is arranged in an inverted cone shape, the end of the supporting seat is fixedly connected to a top seat, the end face of the top seat is opened with a groove, and a movable seat is slidably connected to the inside of the groove, and a plurality of magnetic blocks are fixedly embedded in the lower end of the movable seat, and a plurality of magnetic push electromagnets corresponding to the positions of the magnetic blocks are fixedly inserted at the bottom of the groove, and a plurality of sliding rods are fixedly installed at the bottom of the groove, and the rod wall of each sliding rod is slidably connected to the end face of the movable seat, and a plurality of springs are fixedly provided between the movable seat and the bottom of the groove.

[0007] In the above-mentioned supporting device for cantilever construction of large-span steel structures, a high-pressure air pump is fixedly installed at the lower end of the top seat, and a gas hose is fixedly connected to the output end of the high-pressure air pump. A cavity is opened inside the movable seat, and the cavity is fixedly connected to the gas hose, and a plurality of air injection holes are opened on the upper cavity wall of the cavity.

[0008] In the above-mentioned supporting device for cantilever construction of large-span steel structures, four hydraulic supporting cylinders are fixedly installed on the end surface of the base, and the output end of each hydraulic supporting cylinder is fixedly connected to the lower end of the top seat.

[0009] In the above-mentioned supporting device for cantilever construction of large-span steel structures, the output end of each hydraulic supporting cylinder is fixedly sleeved with a reinforcing plate, and the upper end of each reinforcing plate is fixedly connected with a fixed diagonal brace rod, and the rod end of each fixed diagonal brace rod is fixedly connected to the side wall of the supporting seat.

[0010] In the above-mentioned supporting device for cantilever construction of a large-span steel structure, adjustable leveling feet are fixedly installed at the four corners of the lower end of the base.

[0011] In the above-mentioned supporting device for cantilever construction of large-span steel structures, the lower end of each reinforcing plate is fixedly connected with a movable diagonal brace, and the lower end of each movable diagonal brace is fixedly connected with a slider, and each slider is slidably connected to the side wall of the supporting steel column.

[0012] In the above-mentioned support device for cantilever construction of a large-span steel structure, the top of the support seat and the lower end of the top seat are fixedly connected with a plurality of support frames, and each support frame is arranged in an X shape.

[0013] In the above-mentioned supporting device for cantilever construction of a large-span steel structure, a plurality of retaining columns are fixedly installed at the bottom of the groove, and the top of each retaining column is higher than the top of each magnetic push electromagnet.

[0014] In the above-mentioned supporting device for cantilever construction of a large-span steel structure, each of the jet holes is arranged in a conical shape, and the aperture of the air inlet end of each jet hole is larger than the aperture of the air outlet end.

[0015] The above-mentioned method for using the supporting device for cantilever construction of a large-span steel structure comprises the following steps:

[0016] S1. Move the base to the pre-determined support position;

[0017] S2, start the jack and each hydraulic support cylinder, make the distance between the end surface of the movable seat and the lower end of the cantilever beam to be supported be maintained at 2mm-4mm, and then stop the work of the hydraulic support cylinder and the jack;

[0018] S3, start the high-pressure air pump, and stop the high-pressure air pump after minutes;

[0019] S4. Subsequently, each magnetic push electromagnet is started. Under the action of each magnetic push electromagnet, each magnetic block can be pushed to drive the movable seat and the lower end of the cantilever beam to be stably against each other.

[0020] Compared with the existing technology, the advantages of a support device for cantilever construction of large-span steel structures are:

[0021] 1. Through the cooperation of the provided base, supporting steel column, mounting hole, jack, supporting seat, top seat, groove, movable seat, magnetic block, magnetic push electromagnet, sliding rod and spring, the height of the movable seat on the top can be adjusted within a certain range according to the cantilever beam to be supported through the jack, and the electromagnetic reverse thrust support can ensure stable support for the cantilever beam while pressing down and buffering the cantilever beam when the force is uneven, thereby reducing the possibility of support failure and stability failure caused by direct uneven force distribution.

[0022] 2. Through the cooperation of the high-pressure air pump, air hose, cavity and air jet hole, high-pressure air can be sprayed on the bottom of the cantilever beam support position before supporting the cantilever beam. The airflow can be used to blow away the particulate impurities that may exist at the bottom of the cantilever beam to prevent the particulate impurities from affecting the stability of the support.

[0023] 3. Through the installation of hydraulic support cylinders, the top seat can be stably supported from the outer edge of the base to further improve the overall stability. Through the cooperation of the reinforcement plates, fixed diagonal braces, movable diagonal braces and sliders of the facilities, not only can the force of the support seat be distributed, but also the support steel columns can be used to ensure the reinforcement support of each hydraulic support cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a support device for cantilever construction of a large-span steel structure provided by the present invention;

[0025] Figure 2 It is a schematic diagram of the connection structure between the top seat and the movable seat of a support device for cantilever construction of a large-span steel structure provided by the present invention;

[0026] Figure 3 It is a schematic diagram of the internal structure of a supporting steel column of a supporting device for cantilever construction of a large-span steel structure provided by the present invention;

[0027] Figure 4 The diagram is a top view of the structure of a reinforcement plate of a support device for cantilever construction of a large-span steel structure provided by the present invention.

[0028] In the figure: 1. base; 2. supporting steel column; 3. mounting hole; 4. jack; 5. supporting seat; 6. top seat; 7. groove; 8. movable seat; 9. magnetic block; 10. magnetic push electromagnet; 11. sliding rod; 12. spring; 13. high-pressure air pump; 14. air delivery hose; 15. cavity; 16. jet hole; 17. hydraulic support cylinder; 18. reinforcing plate; 19. fixed diagonal support rod; 20. adjustable leveling foot; 21. movable diagonal support rod; 22. sliding block; 23. support frame; 24. stop column. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] like Figure 1-4 As shown, a supporting device for cantilever construction of a large-span steel structure comprises a base 1, a supporting steel column 2 is fixedly installed on the end surface of the base 1, a mounting hole 3 is opened inside the supporting steel column 2, and a jack 4 is fixedly installed inside the mounting hole 3, and an output end of the jack 4 is fixedly connected to a supporting seat 5, the supporting seat 5 is arranged in an inverted cone shape, and an end of the supporting seat 5 is fixedly connected to a top seat 6, and a groove 7 is opened on the end surface of the top seat 6, and a movable seat 8 is slidably connected inside the groove 7, and a plurality of magnetic blocks 9 are fixedly embedded at the lower end of the movable seat 8, and a plurality of magnetic push electromagnets 10 corresponding to the positions of the magnetic blocks 9 are fixedly inserted at the bottom of the groove 7, and a plurality of sliding rods 11 are fixedly installed at the bottom of the groove 7, and the rod wall of each sliding rod 11 is slidably connected to the end surface of the movable seat 8, and a plurality of springs 12 are fixedly provided between the movable seat 8 and the bottom of the groove 7.

[0031] A high-pressure air pump 13 is fixedly installed at the lower end of the top seat 6, and a gas hose 14 is fixedly connected to the output end of the high-pressure air pump 13. A cavity 15 is opened inside the movable seat 8, and the cavity 15 is fixedly connected to the gas hose 14. A plurality of air jet holes 16 are opened on the upper cavity wall of the cavity 15. Through this arrangement, high-pressure airflow can be blown in and out of the supporting position of the cantilever beam before supporting, so as to remove some granular impurities as much as possible and prevent the granular impurities from affecting the subsequent support stability.

[0032] Four hydraulic support cylinders 17 are fixedly mounted on the end surface of the base 1 , and the output end of each hydraulic support cylinder 17 is fixedly connected to the lower end of the top seat 6 . This arrangement can improve the support stability of the top seat 6 .

[0033] The output end of each hydraulic support cylinder 17 is fixedly sleeved with a reinforcement plate 18, and the upper end of each reinforcement plate 18 is fixedly connected to a fixed diagonal support rod 19. The rod end of each fixed diagonal support rod 19 is fixedly connected to the side wall of the support seat 5, which can improve the supporting stability of the support seat 5 and distribute the force on the support seat 5.

[0034] Adjustable leveling feet 20 are fixedly installed at the four corners of the lower end of the base 1. Through this arrangement, the base 1 can be easily adjusted to a horizontal state.

[0035] The lower end of each reinforcing plate 18 is fixedly connected to a movable diagonal brace 21, and the lower end of each movable diagonal brace 21 is fixedly connected to a slider 22. Each slider 22 is slidably connected to the side wall of the supporting steel column 2. Through this arrangement, the force sharing of the supporting steel column 2 on each reinforcing plate 18 can be improved.

[0036] The top of the support seat 5 and the lower end of the top seat 6 are fixedly connected with a plurality of support frames 23, and each support frame 23 is arranged in an X shape. Through this arrangement, the connection stability between the support seat 5 and the top seat 6 can be improved.

[0037] A plurality of stop posts 24 are fixedly mounted on the bottom of the groove 7, and the top of each stop post 24 is arranged higher than the top of each magnetic push electromagnet 10. This arrangement can prevent the movable seat 8 from moving down excessively and damaging the magnetic push electromagnet 10.

[0038] Each of the jet holes 16 is arranged in a conical shape, and the aperture of the air inlet end of each jet hole 16 is arranged to be larger than the aperture of the air outlet end. Through this arrangement, the airflow intensity of the cavity exhaust can be improved.

[0039] The above-mentioned method for using the supporting device for cantilever construction of a large-span steel structure comprises the following steps:

[0040] S1, moving the base 1 to a pre-determined support position;

[0041] S2, start the jack 4 and each hydraulic support cylinder 17, and after the distance between the end surface of the movable seat 8 and the lower end of the cantilever beam to be supported is maintained at 2mm-4mm, stop the operation of the hydraulic support cylinder 17 and the jack 4;

[0042] S3, start the high pressure air pump 13, and after 5 minutes, stop the operation of the high pressure air pump 13;

[0043] S4. Subsequently, each magnetic push electromagnet 10 is started. Under the action of each magnetic push electromagnet 10, each magnetic block 9 can be pushed to drive the movable seat 8 to stably abut against the lower end of the cantilever beam.

[0044] The operating principle of the present invention is described as follows: move the base 1 to the pre-determined support position, start the jack 4 and each hydraulic support cylinder 17, and keep the distance between the end face of the movable seat 8 and the lower end of the cantilever beam to be supported at 2mm-4mm, then stop the operation of the hydraulic support cylinder 17 and the jack 4, start the high-pressure air pump 13, and stop the operation of the high-pressure air pump 13 after 5 minutes, and then start each magnetic push electromagnet 10. Under the action of each magnetic push electromagnet 10, each magnetic block 9 can be pushed to drive the movable seat 8 to stably resist the lower end of the cantilever beam. When the cantilever beam is unevenly stressed due to splicing or other reasons, the movable seat 8 at the excessive pressure point will overcome the magnetic thrust, so that the movable seat 8 can be moved down by the first gap. The magnetic thrust and the reverse thrust of the spring 12 can be used to buffer the pressure of the cantilever beam, avoid causing a large hard impact on the jack 4, improve the support stability of the jack 4, and reduce the possibility of support failure.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A support device for cantilever construction of a large-span steel structure, comprising a base (1), characterized in that: A support steel column (2) is fixedly installed on the end surface of the base (1), a mounting hole (3) is provided inside the support steel column (2), and a jack (4) is fixedly installed inside the mounting hole (3), and the output end of the jack (4) is fixedly connected to a support seat (5), and the support seat (5) is set in an inverted cone shape, and the end of the support seat (5) is fixedly connected to a top seat (6), and a groove (7) is provided on the end surface of the top seat (6), and a movable seat (8) is slidably connected inside the groove (7), and a plurality of magnetic blocks (9) are fixedly embedded at the lower end of the movable seat (8), and a plurality of magnetic push electromagnets (10) corresponding to the positions of the magnetic blocks (9) are fixedly inserted at the bottom of the groove (7), and a plurality of sliding rods (11) are fixedly installed at the bottom of the groove (7), and the rod wall of each sliding rod (11) is slidably connected to the end surface of the movable seat (8), and a plurality of springs (12) are fixedly provided between the movable seat (8) and the bottom of the groove (7); A high-pressure air pump (13) is fixedly mounted at the lower end of the top seat (6), and an output end of the high-pressure air pump (13) is fixedly connected to a gas delivery hose (14). A cavity (15) is provided inside the movable seat (8), and the cavity (15) is fixedly connected to the gas delivery hose (14). A plurality of air injection holes (16) are provided on the upper cavity wall of the cavity (15); Four hydraulic support cylinders (17) are fixedly mounted on the end surface of the base (1), and the output end of each hydraulic support cylinder (17) is fixedly connected to the lower end of the top seat (6).

2. A support device for cantilever construction of a large-span steel structure according to claim 1, characterized in that: The output end of each hydraulic support cylinder (17) is fixedly sleeved with a reinforcement plate (18), and the upper end of each reinforcement plate (18) is fixedly connected to a fixed diagonal support rod (19), and the rod end of each fixed diagonal support rod (19) is fixedly connected to the side wall of the support seat (5).

3. A support device for cantilever construction of a large-span steel structure according to claim 1, characterized in that: Adjustable leveling feet (20) are fixedly mounted at the four corners of the lower end of the base (1).

4. A support device for cantilever construction of a large-span steel structure according to claim 3, characterized in that: The lower end of each reinforcing plate (18) is fixedly connected to a movable diagonal brace (21), and the lower end of each movable diagonal brace (21) is fixedly connected to a slider (22), and each slider (22) is slidably connected to the side wall of the supporting steel column (2).

5. The supporting device for cantilever construction of a large-span steel structure according to claim 1, characterized in that: A plurality of support frames (23) are fixedly connected to the top of the support seat (5) and the lower end of the top seat (6), and each support frame (23) is arranged in an X shape.

6. The supporting device for cantilever construction of a large-span steel structure according to claim 1, characterized in that: A plurality of blocking columns (24) are fixedly mounted on the bottom of the groove (7), and the top of each blocking column (24) is arranged higher than the top of each magnetic push electromagnet (10).

7. The supporting device for cantilever construction of a large-span steel structure according to claim 1, characterized in that: Each of the jet holes (16) is arranged in a conical shape, and the aperture of the air inlet end of each jet hole (16) is arranged to be larger than the aperture of the air outlet end.

8. A method for using a support device for cantilever construction of a large-span steel structure according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1. Move the base (1) to a pre-determined support position; S2, starting the jack (4) and each hydraulic support cylinder (17), so that the distance between the end surface of the movable seat (8) and the lower end of the cantilever beam to be supported is maintained at 2 mm-4 mm, and then stopping the operation of the hydraulic support cylinder (17) and the jack (4); S3, starting the high-pressure air pump (13), and stopping the high-pressure air pump (13) after 5 minutes; S4. Subsequently, each magnetic push electromagnet (10) is started. Under the action of each magnetic push electromagnet (10), each magnetic block (9) can be pushed to drive the movable seat (8) to stably abut against the lower end of the cantilever beam.

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