An assembly of detachable section limiter

Abstract

The utility model discloses a kind of assembled detachable section limiters, including U-shaped steel section limiting plate, the both ends of U-shaped steel section limiting plate are provided with the bending limiting end compatible with section steel lug structure, the bending limiting end has a limiting groove, the section steel lug of U-shaped steel top is in the limiting groove, the middle of U-shaped steel section limiting plate is horizontal pressing plate part, and the horizontal pressing plate part is in the U-shaped groove of U-shaped steel.The detachable section limiter of the present application is installed above U-shaped steel, the bending limiting end and horizontal pressing plate part of the section limiter are buckled on U-shaped steel, the section steel lug of U-shaped steel top is in the limiting groove, and the limiting is firm, the reinforcing rib is fixedly connected with horizontal pressing plate part by bolt, and then the bending limiting end is fastened using fastening bolt, the limiter can prevent component from distortion buckling, increase section bending and torsional stiffness.

Description

Technical Field

[0001] This utility model relates to a limiter, specifically to an assembly detachable section limiter. Background Technology

[0002] Currently, the vast majority of roadway support in high-pressure areas of coal mines uses retractable metal arch supports. These retractable metal arch supports are mostly made from mining U-shaped steel, with the U-shaped steel sections connected to each other to form an arch.

[0003] U-shaped steel is generally made of low-alloy high-strength steel, which has good strength and toughness, but its cross-sectional shape is open, resulting in low torsional and lateral stiffness, and it is prone to overall or local buckling under compression.

[0004] The rock strata surrounding underground roadways generate high stress under the influence of mining activities, especially in deep mines where ground pressure often exceeds design values, increasing the axial and lateral loads on the supports. The two steel lugs of the U-shaped steel are easily deformed by external pressure, affecting the service life of the U-shaped steel and making it difficult to guarantee the safety of coal mine roadways.

[0005] Therefore, a device is needed to solve the problem of U-shaped steel deformation under pressure. Utility Model Content

[0006] To address the problem of U-shaped steel deformation under pressure, this invention provides an assembly of a detachable section limiter to improve the connection strength of U-shaped steel.

[0007] This utility model provides the following technical solution: A detachable cross-section limiter includes a U-shaped steel cross-section limit plate. The two ends of the U-shaped steel cross-section limit plate are provided with bent limit ends adapted to the steel hanging lug structure. The bent limit end has a limit groove. The steel hanging lug at the top of the U-shaped steel abuts in the limit groove. The middle of the U-shaped steel cross-section limit plate is a horizontal pressure plate part, which abuts in the U-shaped groove of the U-shaped steel.

[0008] Furthermore, the U-shaped steel section limiting plate is a corrugated plate.

[0009] Furthermore, the bending limiting end is tightly attached to the steel hanging lug and the upper part of the inner wall of the U-shaped steel.

[0010] Furthermore, the outer side of the bending limiting end has an extension or a curled portion.

[0011] Furthermore, reinforcing ribs are installed on the horizontal pressure plate, and the reinforcing ribs are fixedly connected to the horizontal pressure plate by bolts.

[0012] Furthermore, the bending limiting end is equipped with fastening bolts, and can also be fixed by screw pressing or nail gun pressing.

[0013] Furthermore, the U-shaped steel section limiting plate is a U-shaped limiting plate, the middle of which is a U-shaped part made of U-shaped material, and the outer sides of the bent limiting ends at both ends of the U-shaped part have curled parts.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This detachable section limiter is installed on top of the U-shaped steel. The bending limit end and the horizontal pressure plate of this section limiter are fastened to the U-shaped steel. The steel hanging lug at the top of the U-shaped steel abuts against the limit groove, and the limit is secure. The reinforcing rib is fixedly connected to the horizontal pressure plate by bolts, and then the bending limit end is tightened with fastening bolts. During disassembly, simply unscrew the fastening bolts at the bent limiting end and the bolts on the reinforcing ribs to remove the section limiter; disassembly and assembly are convenient. This limiter prevents distortional buckling of the component and increases the bending and torsional stiffness of the section. This, in turn, ensures the safe use of the U-shaped steel, guarantees roadway safety, and ensures smooth and safe production. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of Embodiment 1 (Extension) of the present utility model; Figure 2 A cross-sectional view of the fastener being installed in Embodiment 1 (Extension) of this utility model; Figure 3 This is a cross-sectional view of Embodiment 1 (curled portion) of the present invention; Figure 4 This is a cross-sectional view of another embodiment of the present invention; Figure 5 This utility model Figure 4 Side view; Figure 6 This is a perspective view of the U-shaped limiting plate of this utility model; Figure 7 This is a perspective view of the U-shaped limiting plate of this utility model; Figure 8 This is a perspective view of the U-shaped limiting plate of this utility model.

[0016] In the diagram: 1. U-shaped steel section limiting plate; 2. Bending limiting end; 21. Limiting groove; 22. Extension; 23. Curved part; 24. Fastener; 3. U-shaped steel; 31. Steel hanging lug; 32. U-shaped groove; 4. Horizontal pressure plate; 5. Reinforcing rib; 6. Bolt; 7. Fastening bolt; 8. Caliper; 9. U-shaped part. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1:

[0018] A detachable cross-section limiter includes a U-shaped steel cross-section limit plate 1. Both ends of the U-shaped steel cross-section limit plate 1 are provided with bent limit ends 2 adapted to the steel lug structure. Each bent limit end 2 has a limit groove 21. The steel lug 31 at the top of the U-shaped steel 3 abuts against the limit groove 21. The middle of the U-shaped steel cross-section limit plate 1 is a horizontal pressure plate part 4, which abuts against the U-shaped groove 32 of the U-shaped steel 3. The bent limit end 2 and the horizontal pressure plate part 4 of this cross-section limiter are fastened onto the U-shaped steel 3.

[0019] The bending limiting end 2 is closely attached to the upper part of the inner wall of the steel hanging lug 31 and the U-shaped steel 3. The outer side of the bending limiting end 2 has an extension 22 or a curled part 23.

[0020] Figure 1 As shown, the extension 22 can hold the steel hanging lug 31 within the limiting groove 21. It can also be further secured by adding fasteners 24 to the extension 22. Figure 2 (As shown).

[0021] Figure 3 As shown, the curled part 23 can wrap the steel hanging ear 31 inside the limiting groove 21. In actual construction, the extension part 22 is bent directly to form the curled part 23 using the customized caliper 8. The curled part 23 is used to limit the U-shaped steel 3, eliminating the need for fixing with screws and other parts, making installation more convenient.

[0022] The U-shaped steel 3 is limited by the bending limiting end 2, and the horizontal pressure plate part 4 makes the bending limiting end 2 more tightly fit the top of the U-shaped steel 3, resulting in a good limiting effect. This ensures the safe use of the U-shaped steel, prevents deformation under pressure, ensures the safety of the roadway, and ensures the smooth and safe operation of production.

[0023] In this embodiment, the U-shaped steel section limiting plate 1 is preferably a corrugated plate, because the corrugated plate can enhance the overall load-bearing capacity of the limiter and improve the structural stiffness and stability.

[0024] Figures 6-8 As shown, the U-shaped steel section limiting plate 1 is a U-shaped limiting plate. The middle of the U-shaped limiting plate is a U-shaped part 9 made of U-shaped material. The outer sides of the bent limiting ends 2 at both ends of the U-shaped part 9 have curled parts 23 to increase compressive strength. Example 2:

[0025] Figure 4-5 As shown, the U-shaped steel section limiting plate 1 can also be made of ordinary steel. In this case, reinforcing ribs 5 are installed on the horizontal pressure plate part 4, and the reinforcing ribs 5 are fixedly connected to the horizontal pressure plate part 4 by bolts 6. Fastening bolts 7 are installed on the bent limiting end 2, and can also be fixed by screw pressing or nail gun pressing, while avoiding screw jamming. The addition of reinforcing ribs 5 makes the limiting more secure. Other structures are the same as in Embodiment 1.

[0026] During installation: This detachable section limiter is installed above the U-shaped steel 3. The bending limit end 2 and the horizontal pressure plate part 4 of this section limiter are fastened to the U-shaped steel 3. The steel hanging lug 31 at the top of the U-shaped steel 3 abuts against the limit groove 21, and the limit is secure. The reinforcing rib 5 is fixedly connected to the horizontal pressure plate part 4 by bolts 6, and then the bending limit end 2 is tightened by fastening bolts 7.

[0027] The U-shaped steel 3 itself has an inner wall of a U-shaped groove 32 and steel lugs 31 at both ends. The bending limiting end 2 and the horizontal pressure plate part 4 of this section limiter are fastened to the U-shaped steel 3, providing a good limiting effect. The bending limiting end 2 is in close contact with the steel lugs 31 and the upper part of the inner wall of the U-shaped steel 3, and its contour matches the surface of the U-shaped steel, resulting in a good limiting effect. During disassembly, it is only necessary to unscrew the fastening bolt 7 of the bending limiting end 2 and the bolt 6 on the reinforcing rib 5 to remove the section limiter, making disassembly and assembly convenient. This limiter can prevent the component from undergoing abnormal buckling and increase the bending and torsional stiffness of the section. It effectively solves the problem of U-shaped steel deformation under compression.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable cross-section limiter, characterized in that: Includes a U-shaped steel section limiting plate (1), the two ends of the U-shaped steel section limiting plate (1) are provided with bent limiting ends (2) adapted to the steel hanging lug structure, the bent limiting end (2) has a limiting groove (21), the steel hanging lug (31) at the top of the U-shaped steel (3) abuts in the limiting groove (21), the middle of the U-shaped steel section limiting plate (1) is a horizontal pressure plate part (4), the horizontal pressure plate part (4) abuts in the U-shaped groove (32) of the U-shaped steel (3).

2. The detachable cross-section limiter according to claim 1, characterized in that, The U-shaped steel section limiting plate (1) is a corrugated plate.

3. The detachable cross-section limiter according to claim 2, characterized in that: The bending limiting end (2) is closely attached to the upper part of the inner wall of the steel hanging ear (31) and the U-shaped steel (3).

4. The detachable cross-section limiter according to claim 3, characterized in that: The outer side of the bending limiting end (2) has an extension (22) or a curled portion (23).

5. The detachable cross-section limiter according to claim 3, characterized in that: A reinforcing rib (5) is installed on the horizontal pressure plate (4), and the reinforcing rib (5) is fixedly connected to the horizontal pressure plate (4) by bolts (6).

6. The detachable cross-section limiter according to claim 5, characterized in that: The bending limiting end (2) is equipped with a fastening bolt (7), and can also be fixed by screw pressing or nail gun pressing.

7. The detachable cross-section limiter according to claim 1, characterized in that, The U-shaped steel section limiting plate (1) is a U-shaped limiting plate. The middle part of the U-shaped limiting plate is a U-shaped part (9) made of U-shaped material. The outer sides of the bent limiting ends (2) at both ends of the U-shaped part (9) have curled parts (23).

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