A mine-used U-shaped steel structure

Abstract

The utility model discloses a kind of mining U-shaped steel structures, including steel structure body, the steel structure body is integrally hot rolled from bottom and web, and steel structure body is overall U-shaped;The free end of the web is outwardly hemmed to form a lug portion;The thickness of the steel structure body gradually decreases from the midpoint position of bottom to the free end of two side webs. The bottom of U-shaped steel structure is set to circular, which facilitates rolling. The entire cross-sectional shape of the U-shaped steel structure is developed, the thickness of the entire steel structure is reduced, and the fabricated component is more lightweight, greatly reducing the pressure of underground construction. The two main shafts have a larger moment of inertia and can resist a larger bending moment. The two webs are bent to strengthen the slender webs, allowing the two webs to withstand greater loads without local deformation.

Description

Technical Field

[0001] This utility model relates to a steel structure, and more particularly to a U-shaped steel structure for mining, belonging to the field of mining steel processing technology. Background Technology

[0002] Currently, U-shaped steel used for mine roadway support is generally thick and heavy, posing a significant challenge to underground operations. On the other hand, the current steel consumption is large, which does not meet the development needs of energy conservation and environmental protection. Utility Model Content

[0003] The purpose of this utility model is to provide a mining U-shaped steel structure that can achieve lightweight steel while bearing greater loads without local deformation.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a mining U-shaped steel structure, including a steel structure body, wherein the steel structure body is integrally hot-rolled from the bottom and the web, and the steel structure body is U-shaped as a whole; the free ends of the web are rolled outward to form hanging ears; the thickness of the steel structure body gradually decreases from the midpoint of the bottom to the free ends of the webs on both sides.

[0005] In order to achieve the goal of lightweighting U-shaped steel structures, this application has made an improved design based on existing steel sections. This not only achieves the goal of lightweighting U-shaped steel, but also gives its two main axes a larger moment of inertia, which can resist a larger bending moment.

[0006] Preferably, the bottom is circular or flat. When the bottom is circular, its arc radius R is 30mm-60mm and its thickness t2 at the midpoint of the bottom is 5mm-30mm. When the bottom is flat, its thickness t2 is 5mm-30mm.

[0007] This application explores new shapes for the bottom of U-shaped steel structures. The bottom of the U-shaped steel structure proposed in this application has two shapes. One is a circular bottom, which facilitates rolling; the entire cross-section is expanded, resulting in a lighter and more agile component, and the two principal axes have a larger moment of inertia, capable of resisting greater bending moments. The other shape has a straight bottom with a bend at the web, reinforcing the slender web, allowing the two webs to withstand greater loads without localized deformation.

[0008] Preferably, the thickness t1 at the junction of the web and the lug is 3mm-12mm, and t1 and t2 cannot have the same value at the same time.

[0009] In this technical solution, the thickness of the web plates on both sides gradually decreases from the bottom, thus achieving lightweighting of the steel structure.

[0010] Preferably, the width B of the U-shaped opening of the steel structure body is 120mm-300mm, and its height H is 99mm-275mm.

[0011] Preferably, the web is bent, and has a bend portion. This bend portion can strengthen the slender web, allowing the two webs to withstand greater loads without local deformation.

[0012] Preferably, the width W of the horizontal section of the bent portion is 5mm-30mm.

[0013] Preferably, when the bottom is flat, the width D of its horizontal section is 20mm-70mm.

[0014] Preferably, the width B of the U-shaped opening of the steel structure body is the width between the outer edges of the two hanging ears.

[0015] The beneficial effects of this invention are as follows: The bottom of the U-shaped steel structure is set in a circular shape, which facilitates rolling; the entire cross-sectional shape of the U-shaped steel structure is expanded, reducing the overall thickness of the steel structure and making the manufactured components lighter, greatly reducing the pressure of underground construction. Its two main axes have a larger moment of inertia, which can resist larger bending moments; the two webs are strengthened by bending, allowing them to withstand larger loads without local deformation. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A cross-sectional schematic diagram; Figure 3 This is a schematic diagram of the second structure of this utility model; Figure 4 for Figure 3 A cross-sectional schematic diagram; Figure 5 This is a schematic diagram of the third structure of this utility model; Figure 6 for Figure 4 A cross-sectional schematic diagram; Figure 7 The curve showing the comparison between the load-bearing capacity of the U-shaped steel structure made of this utility model and the load-bearing capacity of the traditional 36U arch frame; In the diagram: 1. Steel structure body, 2. Bottom, 3. Web plate, 4. Hanging lug, 5. Bending section. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in this application will be clearly and completely described below in conjunction with embodiments.

[0019] This utility model discloses a U-shaped steel structure for mining, including a steel structure body 1. The steel structure body 1 is integrally hot-rolled from a bottom 2 and a web 3, and the steel structure body 1 is U-shaped in general. The free ends of the web 3 are rolled outward to form hanging ears 4. The thickness of the steel structure body 1 gradually decreases from the midpoint of the bottom 2 to the free ends of the web 3 on both sides.

[0020] In order to achieve the goal of lightweighting U-shaped steel structures, this application has made an improved design based on existing steel sections. This not only achieves the goal of lightweighting U-shaped steel, but also gives its two main axes a larger moment of inertia, which can resist a larger bending moment.

[0021] See the following examples for details: Example 1

[0022] like Figures 1-2 As shown, when the bottom of the steel structure body 1 is circular, the thickness t2 at the midpoint of its bottom is 5mm-30mm, and its arc radius R is 30mm-60mm; the thickness t1 at the connection between the web plate 3 and the lug 4 is 3mm-12mm, and t1 and t2 cannot have the same value simultaneously; the width B of the U-shaped opening of the steel structure body 1 is 120mm-300mm, and its height H is 99mm-275mm. In this patent, the width B of the U-shaped opening of the steel structure body 1 is the width between the outer edges of the lugs on both sides.

[0023] The thickness of the web plates 3 on both sides gradually decreases from the bottom. The connection between the web plate 3 and the lug 4 is the thinnest part of the steel structure body 1. The gradually changing web plate thickness realizes the lightweighting of the steel structure, making the overall components light and the two main axes have a larger moment of inertia, which can resist a larger bending moment.

[0024] like Figure 7 The figure shows a comparison curve of the load-bearing capacity of the arch frame made of the U-shaped steel structure of this utility model and the load-bearing capacity of the traditional 36U arch frame. The experiment shows that the load-bearing capacity of the arch frame made of the U-shaped steel structure of this utility model is increased by 14% compared with the traditional 36U arch frame. The hanging lugs of this utility model are smaller and thinner than the traditional steel profiles; and the weight reduction rate reaches 35%.

[0025] Experiments have shown that changing the thickness of the support significantly improves its load-bearing capacity, regardless of whether the support is subjected to load at the base of the column or displacement loading.

[0026] Example 2 like Figures 3-4As shown, this is the second structural form of the present invention, in which the web 3 is bent and has a bent portion 5. This bent portion can strengthen the slender web, allowing the two webs to withstand greater loads without local deformation. The horizontal width W of the bent portion is 5mm-30mm. The other parameters of the web 3 and the bottom 2 are the same as in Embodiment 1, and will not be repeated here. Compared with Embodiment 1, the web of Embodiment 2 can withstand greater loads without local deformation. Example 3

[0027] like Figures 5-6 As shown, this is the third structural form of the present invention. Based on Embodiment 2, the bottom of the steel structure body 1 is made flat, while other structural forms and parameters are the same as in Embodiment 2. When the bottom 2 is made flat, its horizontal section width D is 20mm-70mm.

[0028] This application explores a new shape for the bottom of U-shaped steel structures. The bottom of the U-shaped steel structure proposed in this application has two shapes: one is a circular bottom for ease of rolling; the other is an expanded cross-sectional shape, resulting in a lighter and more agile component with a larger moment of inertia on the two principal axes, capable of resisting greater bending moments. Simultaneously, the web was studied in depth, with bending at the web to strengthen the slender web, allowing the two webs to withstand greater loads without localized deformation. When the web is bent, the bottom can also be designed in another structural form: a straight bottom.

[0029] The above embodiments have been experimentally verified to demonstrate the structure of the U-shaped steel structure. The described embodiments are only a portion of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A U-shaped steel structure for mining, characterized in that, The steel structure includes a steel body (1), which is integrally hot-rolled from a bottom (2) and a web (3), and the steel body (1) is U-shaped in general; the free ends of the web (3) are rolled outward to form a hanging ear (4); the thickness of the steel body (1) gradually decreases from the midpoint of the bottom (2) to the free ends of the webs (3) on both sides.

2. The mining U-shaped steel structure according to claim 1, characterized in that, The bottom (2) is circular or flat. When the bottom (2) is circular, its arc radius R is 30mm-60mm and its thickness t2 at the midpoint of the bottom is 5mm-30mm. When the bottom (2) is flat, its thickness t2 is 5mm-30mm.

3. The mining U-shaped steel structure according to claim 1, characterized in that, The thickness t1 at the junction of the web (3) and the ear (4) is 3mm-12mm, and t1 and t2 cannot have the same value at the same time.

4. The mining U-shaped steel structure according to claim 1, characterized in that, The U-shaped opening width B of the steel structure body (1) is 120mm-300mm, and its height H is 99mm-275mm.

5. The mining U-shaped steel structure according to claim 2, characterized in that, The web (3) is bent and has a bend (5).

6. The mining U-shaped steel structure according to claim 5, characterized in that, The width W of the horizontal section of the bent part (5) is 5mm-30mm.

7. The mining U-shaped steel structure according to claim 5, characterized in that, When the bottom (2) is flat, its horizontal section width D is 20mm-70mm.

8. The mining U-shaped steel structure according to claim 4, characterized in that, The width B of the U-shaped opening of the steel structure body (1) is the width between the outer edges of the two hanging ears (4).

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