Anti-seismic hot-rolled ribbed steel bar with hollow structure

Abstract

The utility model provides an anti-seismic hot-rolled ribbed steel bar with a hollow structure, which belongs to the technical field of hot-rolled ribbed steel bars and comprises a steel bar main body. The insertion hole is formed in the steel bar main body, a plurality of inner ribs are fixedly connected to the inner wall of the insertion hole, and the plurality of inner ribs are fixedly connected to the inner wall of the insertion hole; the cylindrical embedded steel bars are inserted into the insertion holes and located among the multiple inner ribs, the multiple inner ribs are spirally distributed on the inner walls of the insertion holes around the cylindrical embedded steel bars, and further external stress borne by the whole steel bar body is evenly distributed on the circumferential surfaces of the cylindrical embedded steel bars; by additionally arranging the hollow structure in the hot-rolled ribbed steel bar, on the premise that the shock resistance is not changed, the used raw materials of the hot-rolled ribbed steel bar are reduced, the weight per unit volume is reduced, and the production cost is reduced. And resource waste is avoided, and transportation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot-rolled ribbed steel bars, in particular to an earthquake-resistant hot-rolled ribbed steel bar with a hollow structure. Background Art

[0002] Hot-rolled ribbed steel bars are made of ordinary alloy steel and low-carbon steel. They are formed through a hot rolling process at high temperature and then naturally cooled. The surface of this type of steel bar has longitudinal and transverse ribs, which enhance the bite force between it and the concrete, thereby improving the stability and load-bearing capacity of the structure.

[0003] The authorization publication number "CN103898403B" records "a HRB500 grade hot-rolled ribbed seismic-resistant steel bar and its preparation method. The chemical composition of the steel is as follows by weight: C: 0.17~0.25%, Si: 0.4~0.8%, Mn: 1.2~1.5%, P≤0.045%, S≤0.045%, V: 0.028~0.045%, N: 0.008~0.014%, and the rest are Fe and unavoidable impurity elements. The preparation method includes the steps of molten iron desulfurization, converter smelting, argon blowing, continuous casting, billet heating, rolling, controlled cooling after rolling, and air cooling on the cooling bed. The steel has the advantages of high strength, high toughness and low manufacturing cost. Moreover, its preparation process is simple and the production cost is low."

[0004] Compared to existing vanadium-niobium and vanadium-nitrogen microalloying technologies, the HRB500-grade hot-rolled ribbed seismic-resistant steel bar of the invention not only avoids the addition of precious metals, significantly reducing costs, but also, by adding a MnSiN alloy at the argon station, it avoids the uncontrolled addition of nitrogen, which can cause fluctuating nitrogen content and lead to substandard performance. This allows the vanadium-nitrogen ratio in the steel to be strictly controlled within a range of 3 to 5. This fully utilizes the characteristic of V steel that as nitrogen content increases, the amount of V (C, N) increases and its dispersion increases, resulting in a more significant strengthening effect. This reduces the amount of V alloy used, enabling the low-cost production of small-sized, seismic-resistant HRB500E hot-rolled ribbed steel bars with stable mechanical properties. Furthermore, the steel bar of the invention has a low carbon equivalent and superior weldability. Practice has demonstrated that the steel product of the invention has a hot-rolled yield strength exceeding 520 MPa, an elongation A ≥ 19%, and an Agt ≥ 10%, exhibiting excellent weldability. The preparation process of the present invention is simple and the production cost is low. It is particularly suitable for hot-rolled ribbed seismic-resistant steel bars produced by vanadium-nitrogen microalloy strengthening technology. However, in actual use, the hot-rolled ribbed steel bars with seismic resistance are all solid structures, which not only increases the amount of raw materials used in production and wastes resources, but also causes the produced hot-rolled ribbed steel bars to have a high unit volume weight, which is inconvenient to transport. For this reason, we propose a hollow structure seismic-resistant hot-rolled ribbed steel bar. Utility Model Content

[0005] The purpose of the utility model is to provide a hollow structure earthquake-resistant hot-rolled ribbed steel bar, which aims to reduce the raw materials used in the hot-rolled ribbed steel bar and reduce the unit volume weight without changing the earthquake resistance, thereby avoiding waste of resources and facilitating transportation.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A hollow structure earthquake-resistant hot-rolled ribbed steel bar, comprising a steel bar body;

[0008] A socket, the socket being formed in the main body of the steel bar, the inner wall of the socket being fixedly connected to a plurality of inner ribs, the plurality of inner ribs being fixedly connected to the inner wall of the socket; and

[0009] The cylindrical embedded reinforcement is inserted into the insertion hole and is located between multiple inner reinforcement bars.

[0010] As a preferred solution of the present invention, a plurality of inner ribs are spirally distributed on the inner wall of the insertion hole around the cylindrical anchor bar.

[0011] As a preferred solution of the present invention, the gaps between the multiple inner ribs are called accommodating grooves, and the multiple accommodating grooves are filled with rubber strips, and the multiple rubber strips are distributed in a spiral shape around the cylindrical embedded reinforcement.

[0012] As a preferred solution of the present invention, the plurality of rubber strips are formed by injecting molten rubber into a plurality of containing grooves and cooling and solidifying.

[0013] As a preferred solution of the present invention, a plurality of inner ribs are provided with slots on their inner walls, and the plurality of slots are distributed spirally around the cylindrical embedded reinforcement, and the circumferential surface of the cylindrical embedded reinforcement is fixedly connected with a plurality of strips, and the plurality of strips are inserted into the plurality of slots.

[0014] As a preferred solution of the present invention, a plurality of transverse ribs are fixedly connected to the circumferential surface of the steel bar body, and a plurality of longitudinal ribs are fixedly connected to the circumferential surface of the steel bar body.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In this scheme, the cylindrical rebar is subjected to the extrusion of multiple internal bars, and the multiple internal bars are distributed in a circular pattern around the cylindrical rebar, so that the external stress on the entire steel bar body is dispersed on the circumferential surface of the cylindrical rebar, so that the deformation force on the circumferential surface is distributed and squeezed on the circumferential surface of the cylindrical rebar. Multiple internal bars are spirally distributed on the inner wall of the socket around the cylindrical rebar, further evenly distributing the external stress on the entire steel bar body on the circumferential surface of the cylindrical rebar, and then the circumferential surface of the steel bar body is squeezed by the deformation force without deformation, thereby achieving the anti-seismic effect while reducing the production of raw materials. By adding a hollow structure to the inside of the hot-rolled ribbed steel bar, the use of raw materials for the hot-rolled ribbed steel bar and the unit volume weight can be reduced without changing the anti-seismic capacity, thereby avoiding waste of resources and facilitating transportation.

[0017] 2. In this solution, multiple accommodating grooves are used to accommodate multiple rubber strips. By filling multiple accommodating grooves, multiple rubber strips can increase the overall flexibility of the steel bar body, so that the hollow structure earthquake-resistant hot-rolled ribbed steel bars will not produce spiral deformation due to axial rotation, thereby improving the seismic performance of the hollow structure earthquake-resistant hot-rolled ribbed steel bars.

[0018] 3. In this solution, multiple rubber strips are made of molten rubber that is injected into multiple receiving grooves and cooled and solidified. The multiple rubber strips solidify to fill the gaps in the holes, cylindrical rebars and multiple receiving grooves, so that the steel bar body, cylindrical rebars and multiple rubber strips appear as a whole, thereby improving the overall structural strength of the hollow structure's earthquake-resistant hot-rolled ribbed steel bars. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a first perspective view of a hollow structure earthquake-resistant hot-rolled ribbed steel bar of the utility model;

[0021] Figure 2 This is a second perspective view of a hollow structure earthquake-resistant hot-rolled ribbed steel bar of the utility model;

[0022] Figure 3 This is a first half cross-sectional view of a hollow structure earthquake-resistant hot-rolled ribbed steel bar of the utility model;

[0023] Figure 4 This is a half-section exploded view of a hollow structure earthquake-resistant hot-rolled ribbed steel bar of the utility model;

[0024] Figure 5 This is the second half cross-sectional view of a hollow structure earthquake-resistant hot-rolled ribbed steel bar of the utility model.

[0025] In the figure: 1. Steel bar body; 2. Insert hole; 3. Cylindrical embedded steel bar; 4. Clamping strip; 5. Rubber strip; 6. Horizontal rib; 7. Longitudinal rib; 8. Inner reinforcement bar; 9. Receiving groove; 10. Clamping slot. DETAILED DESCRIPTION

[0026] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] Reference Figure 1 - Figure 5 , a hollow structure earthquake-resistant hot-rolled ribbed steel bar, comprising:

[0029] Steel bar main body 1;

[0030] The socket 2 is provided in the steel bar body 1, and a plurality of inner ribs 8 are fixedly connected to the inner wall of the socket 2. The plurality of inner ribs 8 are fixedly connected to the inner wall of the socket 2; and

[0031] The cylindrical planting reinforcement 3 is inserted into the insertion hole 2 and is located between the multiple inner reinforcement bars 8.

[0032] In the present invention, the steel bar body 1 is inserted into the concrete, and the insertion hole 2 is opened to accommodate multiple internal bars 8 and cylindrical embedded bars 3. The cylindrical embedded bars 3 are squeezed by the multiple internal bars 8. The multiple internal bars 8 are distributed in a circular pattern around the cylindrical embedded bars 3, so that the external stress on the steel bar body 1 as a whole is dispersed on the circumferential surface of the cylindrical embedded bars 3, so that the deformation force on the circumferential surface is distributed to squeeze the circumferential surface of the cylindrical embedded bars 3.

[0033] A plurality of inner ribs 8 are spirally distributed around the cylindrical anchor bar 3 on the inner wall of the insertion hole 2 .

[0034] In the present invention, multiple internal reinforcement bars 8 are spirally distributed around the cylindrical rebar 3 on the inner wall of the insertion hole 2, further evenly distributing the external stress on the entire steel bar body 1 on the circumferential surface of the cylindrical rebar 3, so that the circumferential surface of the steel bar body 1 will not be deformed when squeezed by the deformation force, thereby achieving the anti-seismic effect while reducing the production of raw materials. By adding a hollow structure to the interior of the hot-rolled ribbed steel bar, the use of raw materials for the hot-rolled ribbed steel bar and the unit volume weight are reduced without changing the anti-seismic ability, thereby avoiding waste of resources and facilitating transportation.

[0035] The gaps between the multiple inner ribs 8 are called receiving grooves 9 , and the multiple receiving grooves 9 are filled with rubber strips 5 . The multiple rubber strips 5 are distributed in a spiral shape around the cylindrical planting bar 3 .

[0036] In the present invention, multiple accommodating grooves 9 are used to accommodate multiple rubber strips 5. By filling multiple accommodating grooves 9, multiple rubber strips 5 increase the overall flexibility of the steel bar body 1, so that the hollow structure earthquake-resistant hot-rolled ribbed steel bars will not produce spiral deformation due to axial rotation, thereby improving the seismic performance of the hollow structure earthquake-resistant hot-rolled ribbed steel bars.

[0037] The plurality of rubber strips 5 are formed by injecting molten rubber into a plurality of receiving grooves 9 and cooling and solidifying them.

[0038] In the present invention, the multiple rubber strips 5 are all made of molten rubber that is injected into multiple receiving grooves 9 and cooled and solidified. The multiple rubber strips 5 solidify and fill the gaps in the insertion holes 2, the cylindrical rebars 3 and the multiple receiving grooves 9, so that the steel bar body 1, the cylindrical rebars 3 and the multiple rubber strips 5 appear as a whole, thereby improving the overall structural strength of the hollow structure earthquake-resistant hot-rolled ribbed steel bars.

[0039] The inner walls of the multiple inner ribs 8 are provided with card slots 10 , which are distributed spirally around the cylindrical embedded reinforcement 3 . The circumferential surface of the cylindrical embedded reinforcement 3 is fixedly connected to multiple card strips 4 , which are inserted into the multiple card slots 10 .

[0040] In the present invention, multiple card slots 10 are used to accommodate multiple card strips 4, and multiple card strips 4 are used to be inserted into multiple card slots 10. Multiple card strips 4 restrict the movement of the cylindrical anchor bars 3 by plugging into the multiple card slots 10, and then spirally lock the cylindrical anchor bars 3 in the insertion holes 2 to prevent the cylindrical anchor bars 3 from falling off.

[0041] A plurality of transverse ribs 6 are fixedly connected to the circumferential surface of the steel bar body 1 , and a plurality of longitudinal ribs 7 are fixedly connected to the circumferential surface of the steel bar body 1 .

[0042] In the present invention, the plurality of transverse ribs 6 and longitudinal ribs 7 are used to strengthen the external structural strength of the steel bar body 1 .

[0043] The working principle of the hollow structure earthquake-resistant hot-rolled ribbed steel bar provided by the utility model is:

[0044] The cylindrical planting reinforcement 3 is subjected to the extrusion of multiple inner ribs 8. The multiple inner ribs 8 are distributed in a circular pattern around the cylindrical planting reinforcement 3, so that the external stress on the steel bar body 1 as a whole is dispersed on the circumferential surface of the cylindrical planting reinforcement 3, so that the deformation force on the circumferential surface is distributed and squeezed on the circumferential surface of the cylindrical planting reinforcement 3. The multiple inner ribs 8 are spirally distributed on the inner wall of the insertion hole 2 around the cylindrical planting reinforcement 3, further uniformly distributing the external stress on the steel bar body 1 as a whole on the circumferential surface of the cylindrical planting reinforcement 3, thereby making the circumferential surface of the steel bar body 1 not deformed when squeezed by the deformation force. Thus, the anti-seismic effect can be achieved while reducing the production raw materials. By adding a hollow structure to the inside of the hot-rolled ribbed steel bar, the raw materials used for the hot-rolled ribbed steel bar and the unit volume weight can be reduced without changing the anti-seismic ability, thereby avoiding waste of resources and facilitating transportation.

[0045] The plurality of accommodating grooves 9 are used to accommodate the plurality of rubber strips 5. The plurality of rubber strips 5 increase the flexibility of the entire steel bar body 1 by filling the plurality of accommodating grooves 9, so that the hollow structure earthquake-resistant hot-rolled ribbed steel bar will not produce spiral deformation due to axial rotation, thereby improving the earthquake resistance of the hollow structure earthquake-resistant hot-rolled ribbed steel bar.

[0046] The multiple rubber strips 5 are all made of molten rubber that is injected into multiple receiving grooves 9 and cooled and solidified. The multiple rubber strips 5 solidify and fill the gaps in the insertion holes 2, the cylindrical embedded bars 3 and the multiple receiving grooves 9, so that the steel bar body 1, the cylindrical embedded bars 3 and the multiple rubber strips 5 appear as a whole, thereby improving the overall structural strength of the hollow structure earthquake-resistant hot-rolled ribbed steel bars.

[0047] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A hollow structure earthquake-resistant hot-rolled ribbed steel bar, characterized in that: include; Rebar body (1); A socket (2), the socket (2) being provided in the steel bar body (1), a plurality of inner ribs (8) being fixedly connected to the inner wall of the socket (2), and the plurality of inner ribs (8) being fixedly connected to the inner wall of the socket (2); and A cylindrical embedded reinforcement (3) is inserted into the insertion hole (2), and the cylindrical embedded reinforcement (3) is located between multiple inner reinforcement bars (8).

2. The hollow structure earthquake-resistant hot-rolled ribbed steel bar according to claim 1, characterized in that: A plurality of inner ribs (8) are distributed in a spiral shape on the inner wall of the insertion hole (2) around the cylindrical embedded reinforcement (3).

3. The hollow structure earthquake-resistant hot-rolled ribbed steel bar according to claim 2, characterized in that: The gaps between the plurality of inner ribs (8) are called receiving grooves (9), and the plurality of receiving grooves (9) are filled with rubber strips (5). The plurality of rubber strips (5) are distributed in a spiral shape around the cylindrical embedded reinforcement (3).

4. The hollow structure earthquake-resistant hot-rolled ribbed steel bar according to claim 3, characterized in that: The plurality of rubber strips (5) are formed by injecting molten rubber into a plurality of receiving grooves (9) and cooling and solidifying them.

5. The hollow structure earthquake-resistant hot-rolled ribbed steel bar according to claim 4, characterized in that: A plurality of inner ribs (8) are provided with a clamping groove (10) on their inner walls, and the plurality of clamping grooves (10) are distributed in a spiral shape around the cylindrical embedded reinforcement (3). The circumferential surface of the cylindrical embedded reinforcement (3) is fixedly connected with a plurality of clamping strips (4), and the plurality of clamping strips (4) are inserted into the plurality of clamping grooves (10).

6. The hollow structure earthquake-resistant hot-rolled ribbed steel bar according to claim 5, characterized in that: A plurality of transverse ribs (6) are fixedly connected to the circumferential surface of the steel bar body (1), and a plurality of longitudinal ribs (7) are fixedly connected to the circumferential surface of the steel bar body (1).

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