Fabricated connecting device for steel support

By designing the prefabricated connection device, the symmetrical setting of the end plate stiffener and rotating handle, combined with the multi-point support of the high-leg bolt and the lead screw, the problem of poor tensile resistance of the existing steel support active nodes is solved, and more stable steel support structure and simplified construction process.

CN222252129UActive Publication Date: 2024-12-27THE THIRD CONSTR ENG CO LTD OF CHINA CONSTR SECOND ENG BUREAU +2
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Patent Information

Application Number
CN202420708581.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-08
Publication Date
2024-12-27
Estimated Expiration
2034-04-08

AI Technical Summary

Technical Problem

The tensile resistance performance of the active nodes of existing steel supports is weak and has poor integrity, which cannot meet the requirements of both compressive and tensile resistance. It is complex in construction and heavy in weight, and has a long solidification time for concrete.

Method used

A prefabricated connecting device is designed, including a top screw, a barrel nut, a fixed base and a high foot bolt. The symmetrical setting and adjustment of the nodes is achieved through the end plate stiffener and rotating handle to avoid stress concentration and eccentric pressure. And withstand axial pressure and tension through multiple high-leg bolts and lead screws.

Benefits of technology

It effectively eliminates stress concentration, simplifies the construction process, improves the bending performance and stability of the nodes, avoids continuous damage caused by local instability of the foundation pit, and realizes a lightweight and easy-to-install node design.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222252129U_ABST
Patent Text Reader

Abstract

The utility model discloses an assembly type connecting device for a steel support, which comprises a top lead screw and a bottom lead screw, the top lead screw comprises an end plate, the end plate is a circular plate, a lead screw is arranged in the middle of the end plate, a plurality of end plate stiffening ribs are arranged between the lead screw and the end plate, the end plate stiffening ribs are hollow steel plates, and the end plate stiffening ribs are symmetrically arranged; the barrel-shaped nut penetrates through the lead screw and comprises a top flange plate, an internal steel pipe and an external steel pipe are arranged on one side of the top flange plate, a bottom flange plate is arranged at the ends, away from the top flange plate, of the internal steel pipe and the external steel pipe, and the end, away from the end plate, of the lead screw is fixed in the base. Hollow treatment is carried out on the end plate stiffening ribs, the stress concentration phenomenon of a traditional steel wedge type adjustable joint is effectively eliminated, the defect that applied pre-applied axial force is eliminated quickly is overcome, and eccentric compression of the adjustable joint is avoided due to the fact that the end plate stiffening ribs are symmetrically arranged.
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Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to an assembled connection device for steel support. Background Art

[0002] With the increasing number of foundation pit projects, dark excavated tunnels and pits, bridges and construction projects, reinforced concrete supports or steel supports are generally used for the first support. For the ground-connected wall of the soft soil foundation pit in the south, there will be displacement outside the pit, and the first support is often reinforced concrete support. Practice has proved that reinforced concrete support is a lock structure with good tensile and compressive properties, but the weight and volume of reinforced concrete support are large, the construction is relatively complicated, and the concrete solidification time is relatively long. The tensile performance of the steel wedge-type nodes commonly used in steel supports is relatively weak, with poor integrity, weak bearing capacity, and insufficient rigidity and stability. For the active end nodes that can resist both compression and tension, the commonly used steel wedge-type nodes and steel support connections obviously cannot meet the requirements. Utility Model Content

[0003] The purpose of the utility model is to provide an assembled connection device for steel support, so as to solve the above-mentioned problems in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an assembled connection device for steel support, comprising: a top screw, which includes an end plate, the end plate is a circular plate, a screw is arranged in the middle, a plurality of end plate stiffening ribs are arranged between the screw and the end plate, the end plate stiffening ribs are hollow steel plates, and the plurality of end plate stiffening ribs are symmetrically arranged; a barrel-shaped nut, which is passed through the screw and has a plurality of rotating handles arranged thereon; a fixed base, which includes a top flange, the top flange is a circular plate, and is the same size as the end plate, and the top flange A flange circular hole of the same size as the screw diameter is arranged in the middle, an inner steel pipe and an outer steel pipe are arranged on one side of the top flange, the diameter of the inner steel pipe is equal to the diameter of the flange circular hole, an outer steel pipe is arranged on the outer side of the inner steel pipe, a bottom flange is arranged at the end of the inner and outer steel pipes away from the top flange, flange stiffening ribs are arranged on the bottom flange, the top flange and the outer steel pipe, and the end of the screw away from the end plate is inserted into the flange circular hole and the inner steel pipe; high foot bolts, multiple high foot bolts bolt the end plate and the top flange.

[0005] In a preferred embodiment, the screw is provided with threads, and a gasket is passed through the screw between the barrel nut and the top flange. The gasket is circular, and its outer diameter is equal to that of the barrel nut.

[0006] In a preferred embodiment, a plurality of end plate bolt holes are arranged on the end plate, each end plate bolt hole is evenly arranged on the end plate at an azimuth angle of 60°, and a plurality of top flange bolt holes are arranged on the top flange, and the number of the end plate bolt holes and the top flange bolt holes are equal and arranged correspondingly.

[0007] In a preferred embodiment, a nut is provided at one end of the high foot bolt, the nut is a cylinder, which is arranged in the bolt hole of the end plate, the volume of the nut is equal to the volume of the bolt hole of the end plate, and a small nut is provided on the screw rod below the nut, and the small nut abuts against the end plate;

[0008] The other end of the high foot bolt passes through the bolt hole of the top flange, and a small nut is arranged on the high foot bolt and on the side of the top flange away from the end plate, and the small nut abuts against the top flange;

[0009] A small nut is arranged in the middle of the high foot bolt.

[0010] In a preferred embodiment, one end of the end plate stiffening rib is connected to the end plate and the other end is connected to the lead screw. The end plate bolt hole is arranged between the two end plate stiffening ribs, and the portion where the lead screw is connected to the end plate stiffening rib is not threaded.

[0011] In a preferred embodiment, the flange stiffening rib is an isosceles triangle, one right-angled side of which is fixedly connected to the bottom flange, and the other right-angled side of which is fixedly connected to the external steel pipe.

[0012] In a preferred embodiment, a plurality of bottom flange bolt holes are arranged on the bottom flange, and the bottom flange bolt holes are arranged between two flange stiffening ribs.

[0013] In a preferred embodiment, the diameter of the outer steel tube is larger than the diameter of the inner steel tube, and the diameter of the outer steel tube is smaller than the diameter of the top flange.

[0014] In a preferred embodiment, the diameter of the bottom flange is greater than the diameter of the top flange.

[0015] In a preferred embodiment, the rotating handle is a cylinder, and four rotating handles are symmetrically welded around the barrel nut at an azimuth angle of 90°.

[0016] Compared with the prior art, the utility model has the following characteristics and beneficial effects:

[0017] 1. The utility model uses the end plate stiffening ribs to make the core hollow, which effectively eliminates the stress concentration phenomenon of the traditional steel wedge-type active joint and the disadvantage of applying a pre-axial force to eliminate the stress quickly. The end plate stiffening ribs are symmetrically arranged to avoid eccentric compression of the active joint.

[0018] 2. The components of the utility model are connected by assembly, which is easy to assemble, relatively light in weight, and easy to install on site.

[0019] 3. The utility model can adjust the node length according to the on-site force conditions, and adjust the length of the active node by the amount of screw progress fixing the base.

[0020] 4. The utility model is welded with the embedded steel plate of the ground-connected wall, which can not only withstand the axial pressure of the inner support, but also withstand the tension by arranging multiple high-foot bolts and screws, thus avoiding the possibility of continuous damage to the entire foundation pit due to the instability of local nodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the top screw structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the high foot bolt structure of the utility model;

[0025] Figure 4 It is a schematic diagram of the gasket structure of the utility model;

[0026] Figure 5 It is a schematic diagram of the structure of the barrel-shaped nut of the utility model;

[0027] Figure 6 It is a structural schematic diagram of a fixed base of the utility model.

[0028] Figure markings: 1-end plate, 2-screw, 3-end plate bolt hole, 4-end plate stiffening rib, 5-barrel nut, 6-high bolt, 7-rotating handle, 8-gasket, 9-top flange bolt hole, 10-small nut, 11-top flange, 12-bottom flange, 13-bottom flange bolt hole, 14-external steel pipe, 15-flange stiffening rib, 16-internal steel pipe, 17-nut. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model are described clearly and completely below. The embodiments of the utility model and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Embodiment 1:

[0031] See Example Figure 1-6, the utility model is an assembled connection device for steel support, including a top screw, the top screw includes an end plate 1, the end plate 1 is a circular plate, a plurality of end plate bolt holes 3 are arranged on the end plate 1, a screw 2 is arranged in the middle of the end plate 1, the screw 2 is provided with threads, a barrel nut 5 is passed through the screw 2, a plurality of rotating handles 7 are arranged on the barrel nut 5, and the rotating handle 7 arranged on the barrel nut 5 is a cylinder.

[0032] A plurality of end plate stiffening ribs 4 are arranged between the lead screw 2 and the end plate 1. The end plate stiffening ribs 4 are hollow steel plates. One end of the end plate stiffening ribs 4 is connected to the end plate 1 and the other end is connected to the lead screw 2. The end plate stiffening ribs 4 can effectively improve the integrity of the top lead screw and increase the bending resistance of the active node. The plurality of end plate stiffening ribs 4 are arranged symmetrically to avoid eccentric compression of the active joint. At the same time, it is ensured that when the pre-axial force is applied, the lead screw 2 slides coaxially with the fixed base, reducing the friction between the lead screw 2 and the fixed base during the sliding process.

[0033] The end plate bolt hole 3 is arranged between two end plate stiffening ribs 4, and the portion where the lead screw 2 is connected to the end plate stiffening rib 4 is not provided with threads. The fixed base includes a top flange 11, which is a circular plate and is the same size as the end plate 1. A plurality of top flange 11 bolt holes are arranged on the top flange 11, and each bolt hole is evenly arranged on the end plate 1 at an azimuth angle of 60°. The number of the end plate bolt holes 3 and the top flange 11 bolt holes are equal and arranged correspondingly. A plurality of high foot bolts 6 bolt the end plate 1 and the top flange 11, and the bolts are evenly distributed around the end plate 1 to ensure that the end plate 1 bears a uniform tensile load when tension is generated at the node. A nut 17 is arranged at one end of the high foot bolt 6, and the nut 17 is a cylinder, which is arranged in the end plate bolt hole 3. The volume of the nut 17 is the same size as the volume of the end plate bolt hole 3, and the bolt hole at the end plate 1 can ensure that the nut 17 is sunken into the end plate 1 and maintains the same plane as the end plate 1. When the end plate 1 is welded to the embedded steel plate of the ground-connected wall, no nut 17 protrudes from the end plate 1, thereby ensuring the welding effect.

[0034] A small nut 10 is provided on the screw rod below the nut 17, and the small nut 10 abuts against the end plate 1. The other end of the high-foot bolt 6 passes through the bolt hole of the top flange 11. A small nut 10 is provided on the high-foot bolt 6 and is located on the side of the top flange 11 away from the end plate 1. The small nut 10 abuts against the top flange 11, and a small nut 10 is provided in the middle of the high-foot bolt 6.

[0035] A flange circular hole with the same diameter as the screw 2 is arranged in the middle of the top flange 11, an internal steel pipe 16 and an external steel pipe 14 are arranged on one side of the top flange 11, the diameter of the internal steel pipe 16 is equal to the diameter of the flange circular hole, the external steel pipe 14 is arranged on the outside of the internal steel pipe 16, the diameter of the external steel pipe 14 is larger than the diameter of the internal steel pipe 16, and the diameter of the external steel pipe 14 is smaller than the diameter of the top flange 11.

[0036] The inner steel pipe 16 and the outer steel pipe 14 are provided with a bottom flange 12 at one end away from the top flange 11, and the diameter of the bottom flange 12 is larger than the diameter of the top flange 11. The bottom flange 12 and the outer steel pipe 14 are provided with flange stiffening ribs 15, which are isosceles triangles, one right-angled side of which is fixedly connected to the bottom flange 12, and the other right-angled side of which is fixedly connected to the outer steel pipe 14.

[0037] A plurality of bottom flange bolt holes 13 are arranged on the bottom flange 12, and the bottom flange bolt holes 13 are arranged between two flange stiffening ribs 15. The end of the lead screw 2 away from the end plate 1 is inserted into the flange circular hole and the internal steel pipe 16, and a gasket 8 is inserted on the lead screw 2 between the barrel nut 5 and the top flange 11. The gasket 8 is circular, and its outer diameter is the same as the outer diameter of the barrel nut 5. The main compression parts of the utility model are the top lead screw, the barrel nut 5 and the fixed base, and the main tension parts are the high foot bolts 6, the end plate 1 of the top lead screw and the upper flange of the fixed base. The parts are simply arranged and the force is clear and reasonable.

[0038] Embodiment 2:

[0039] The specific installation and use steps of this utility model are as follows:

[0040] Step 1: A plurality of end plate bolt holes 3 are opened on the end plate 1. The end plate bolt holes 3 are arranged at an azimuth angle of 60°, and the center of the bolt hole is 40 mm away from the edge of the end plate 1. An end plate stiffening rib 4 is arranged between every two end plate bolt holes 3, and the end plate stiffening rib 4 is fixedly connected to the end plate 1 and the lead screw 2;

[0041] Step 2: insert the barrel nut 5 onto the lead screw 2, set a rotating handle 7 on the barrel nut 5, weld four rotating handles 7 around the barrel nut 5 at an azimuth angle of 90°, and then insert the gasket 8 onto the lead screw 2;

[0042] Step 3: A top flange 11 bolt hole is opened on the top flange 11. The arrangement of the top flange 11 bolt holes is consistent with that of the end plate 1. The top flange 11 and the bottom flange 12 are welded by an inner steel pipe 16 and an outer steel pipe 14. The double steel pipes are coaxial. A plurality of flange stiffening ribs 15 are arranged on the top flange 11, the outer steel pipe 14 and the bottom flange 12. There are 12 flange stiffening ribs 15 in total, which are evenly distributed at an azimuth angle of 30°. A bottom flange bolt hole 13 is arranged between every two flange stiffening ribs 15. The arrangement of the bottom flange bolt holes is consistent with that of the steel support flange adopted.

[0043] Step 4: Assemble the lead screw 2 with the barrel nut 5 and the gasket 8, pass the high bolt 6 through the bolt holes of the end plate 1 and the top flange 11 of the fixed base, and tighten the nut. The lead screw 2 penetrates into the interior of the fixed base to make the entire active node in the shortest state;

[0044] Step 5: Transport the assembled flexible node to the site and connect it to the short-circuit section of the steel support. Hoist the connected steel support into the foundation pit, place both ends on the embedded tray of the ground-connected wall, and weld the flexible node end plate 1 to the embedded steel plate of the ground-connected wall.

[0045] Although the 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. An assembled connection device for a steel support, characterized in that: include: A top screw, the top screw comprising an end plate (1), the end plate (1) being a circular plate, the middle of which is provided with a screw (2), a plurality of end plate stiffening ribs (4) being provided between the screw (2) and the end plate (1), the end plate stiffening ribs (4) being a hollow steel plate, and the plurality of end plate stiffening ribs (4) being symmetrically arranged; A barrel-shaped nut (5), the barrel-shaped nut (5) being inserted into the lead screw (2) and having a plurality of rotating handles (7) disposed thereon; A fixed base, the fixed base comprising a top flange (11), the top flange (11) being a circular plate and being of the same size as the end plate (1), a flange circular hole of the same size as the diameter of the lead screw (2) being arranged in the middle of the top flange (11), an inner steel pipe (16) and an outer steel pipe (14) being arranged on one side of the top flange (11), the diameter of the inner steel pipe (16) being equal to the diameter of the flange circular hole, an outer steel pipe (14) being arranged on the outer side of the inner steel pipe (16), a bottom flange (12) being arranged at one end of the inner steel pipe (16) and the outer steel pipe (14) away from the top flange (11), flange stiffening ribs (15) being arranged on the bottom flange (12), the top flange (11) and the outer steel pipe (14), and an end of the lead screw (2) away from the end plate (1) being inserted into the top flange (11) and the inner steel pipe (16); High foot bolts (6), a plurality of high foot bolts (6) are used to bolt the end plate (1) and the top flange (11) together.

2. The assembled connection device for steel support according to claim 1, characterized in that: The lead screw (2) is provided with a thread, and a gasket (8) is passed through the lead screw (2) between the cylindrical nut (5) and the top flange (11). The gasket (8) is circular and has an outer diameter that is equal to the outer diameter of the cylindrical nut (5).

3. The assembled connection device for steel support according to claim 2, characterized in that: The end plate (1) is provided with a plurality of end plate bolt holes (3), each end plate bolt hole (3) is evenly arranged on the end plate (1) at an azimuth angle of 60°, and the top flange (11) is provided with a plurality of top flange (11) bolt holes, the number of the end plate bolt holes (3) and the number of the top flange (11) bolt holes are equal and are arranged correspondingly.

4. The assembled connection device for steel support according to claim 3, characterized in that: A nut (17) is provided at one end of the high foot bolt (6). The nut (17) is a cylindrical body and is arranged in the end plate bolt hole (3). The volume of the nut (17) is equal to the volume of the end plate bolt hole (3). A small nut (10) is provided on the screw rod below the nut (17), and the small nut (10) abuts against the end plate (1). The other end of the high foot bolt (6) passes through the bolt hole of the top flange (11), and a small nut (10) is provided on the high foot bolt (6) and located on the side of the top flange (11) away from the end plate (1), and the small nut (10) abuts against the top flange (11); A small nut (10) is provided in the middle of the high foot bolt (6).

5. The assembled connection device for steel support according to claim 4, characterized in that: One end of the end plate stiffening rib (4) is connected to the end plate (1), and the other end is connected to the lead screw (2); the end plate bolt hole (3) is arranged between the two end plate stiffening ribs (4); and the portion where the lead screw (2) is connected to the end plate stiffening rib (4) is not provided with a thread.

6. The assembled connection device for steel support according to claim 5, characterized in that: The flange stiffening rib (15) is an isosceles triangle, one right-angled side of which is fixedly connected to the bottom flange (12), and the other right-angled side of which is fixedly connected to the external steel pipe (14).

7. The assembled connection device for steel support according to claim 6, characterized in that: A plurality of bottom flange bolt holes (13) are provided on the bottom flange (12), and the bottom flange bolt holes (13) are arranged between two of the flange stiffening ribs (15).

8. The assembled connection device for steel support according to claim 7, characterized in that: The diameter of the outer steel pipe (14) is greater than the diameter of the inner steel pipe (16), and the diameter of the outer steel pipe (14) is smaller than the diameter of the top flange (11).

9. The assembled connection device for steel support according to claim 8, characterized in that: The diameter of the bottom flange (12) is greater than the diameter of the top flange (11).

10. The assembled connection device for steel support according to claim 1, characterized in that: The rotating handle (7) is a cylinder, and four rotating handles (7) are symmetrically welded around the barrel nut at an azimuth angle of 90°.