Hard and soft combined yielding mechanism

Abstract

The utility model belongs to the technical field of roadway supporting, and particularly relates to a hard and soft combined yielding mechanism which comprises a butterfly-shaped supporting plate, a penetrating type groove is formed in the butterfly-shaped supporting plate, a top fixing groove is formed in the upper side wall of the butterfly-shaped supporting plate, a limiting iron ring is fixedly arranged on the upper side wall of the top fixing groove, and the limiting iron ring is fixedly arranged on the lower side wall of the butterfly-shaped supporting plate. The device can be made of steel plates, aluminum pipes and other materials, the structure is simple, on the basis of a traditional butterfly-shaped supporting plate, the diameter of a supporting plate hole is properly enlarged, a buffer pipe is installed, a hard-soft yielding structure is formed, and the yielding structure is the buffer pipe and can also be changed into other soft materials or other shapes according to actual conditions. The method has the advantages of being reasonable in design, simple in structure, simple in construction operation, low in manufacturing cost, low in cost, firm and reliable in rooting, capable of being combined, disassembled and reused and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel support, in particular to a hard-soft combined pressure-releasing mechanism. Background Art

[0002] The stability of tunnel support is an important guarantee for the safe mining of coal resources. Due to the complex and harsh conditions of deep underground rock formations and the severe impact of mining pressure, the pressure on the tunnel roof is large and complex and changeable. When the anchor cable on the tunnel roof is close to the limit load state, the current butterfly support plate is deformed under the pressure of the anchor, squeezing and shearing the anchor cable, resulting in a decrease in the tensile strength and maximum elongation of the anchor cable, and the anchor cable breaks and fails.

[0003] Aiming at the problem of anchor cable breakage on the roof of this type of tunnel, a butterfly-shaped "hard-soft" pressure-yielding structure support plate device is proposed based on the analysis of the mechanical interaction relationship between the "support plate and anchor cable". It has the advantages of reasonable design, simple structure, low manufacturing difficulty, simple construction operation, and economical and practical. When the roof of the tunnel is pressed, the inclined surface of the support plate bends and deforms under the pressure of the anchor to shear the aluminum buffer tube, and the aluminum buffer tube produces plastic pressure-yielding deformation to avoid direct contact between the support plate hole wall and the anchor cable, and shearing the anchor cable. At the same time, it also evenly disperses the pressure of the support plate hole on the anchor cable, and improves the tensile strength and maximum extension of the anchor cable. The purpose is to economically and effectively solve the risk of support plate deformation and shearing anchor cables in tunnel anchor cable support and meet the safety requirements of underground support projects. Utility Model Content

[0004] The purpose of the utility model is to provide a hard-soft combined pressure-releasing mechanism to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hard-soft combined pressure-releasing mechanism, comprising a butterfly-shaped support plate, a through-type groove is provided inside the butterfly-shaped support plate, a top fixing groove is provided on the upper side wall of the butterfly-shaped support plate, a limiting iron ring is fixedly provided on the upper side wall of the top fixing groove, a buffer tube is provided inside the through-type groove, an anchor cable is longitudinally provided inside the buffer tube, an anchor is fixedly provided outside the anchor cable, the lower end of the anchor is clamped with the top fixing groove, and the side wall of the anchor is clamped with the limiting iron ring.

[0006] Preferably, the length of the buffer tube is greater than the thickness of the butterfly support plate, and the thickness of the buffer tube is greater than the lateral deformation of the top and the inclined surface of the butterfly support plate under the ultimate tensile state of the anchor cable.

[0007] Preferably, the inner diameter of the through groove is equivalent to the outer diameter of the buffer tube.

[0008] Preferably, the top surface of the buffer tube is flush with the upper surface of the through groove.

[0009] Preferably, the inner diameter of the annular ring formed by the limiting iron ring is equivalent to the outer diameter of the anchor.

[0010] Preferably, the shape of the through groove matches the shape of the buffer tube.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The present application uses a butterfly-shaped "hard-soft" pressure-yielding structure support plate composed of an anchor cable, an anchor, a through groove, a buffer tube, a butterfly support plate, and a top fixed groove, so that the butterfly support plate can be bent and deformed on the inclined surface to shear the buffer tube under the pressure of the anchor, and the buffer tube can be deformed by plastic pressure-yielding, thereby avoiding direct contact between the support plate hole wall and the anchor cable, thereby preventing the anchor cable from being sheared. At the same time, the lateral pressure of the through groove on the anchor cable is evenly dispersed, and the tensile strength and maximum extension of the anchor cable are improved, thereby economically and effectively solving the problem of support plate deformation and shearing of the anchor cable in tunnel anchor cable support, and meeting the safety requirements of underground support engineering;

[0013] The device can be made of steel plates, aluminum tubes and other materials, and has a simple structure. On the basis of the traditional butterfly support plate, the diameter of the support plate hole is appropriately enlarged, and a buffer tube is installed to form a "hard-soft" pressure-relieving structure. The pressure-relieving structure is a buffer tube, which can also be changed to other softer materials or other shapes according to actual conditions. The present invention has the advantages of reasonable design, simple structure, simple construction and operation, low manufacturing cost, low cost, strong and reliable rooting, and can be combined, disassembled and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of ;

[0016] Figure 3 Schematic diagram of the structure of the buffer tube.

[0017] In the figure: 1 butterfly-shaped supporting plate, 2 through-type groove, 3 top fixing groove, 4 limiting iron ring, 5 buffer tube, 6 anchor cable, 7 anchor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0020] Example:

[0021] See also Figure 1-3 , the utility model provides a technical solution:

[0022] A hard-soft combined pressure-releasing mechanism comprises a butterfly support plate 1, a through groove 2 is provided inside the butterfly support plate 1, a top fixing groove 3 is provided on the upper side wall of the butterfly support plate 1, which is used to fix the anchor 7 laterally to prevent the anchor 7 from being non-coaxial with the butterfly support plate 1 during installation, and to prevent the deformation of the tunnel roof from causing the anchor cable 6 and the butterfly support plate 1 to change in relative lateral position, causing the butterfly support plate 1 to deform and shear the anchor cable 6, a limiting iron ring 4 is fixedly provided on the upper side wall of the top fixing groove 3, a buffer tube 5 is provided inside the through groove 2, the material of the buffer tube 5 includes but is not limited to aluminum, an anchor cable 6 is longitudinally provided inside the buffer tube 5, an anchor 7 is fixedly provided outside the anchor cable 6, the lower end of the anchor 7 is clamped with the top fixing groove 3, and the side wall of the anchor 7 is clamped with the limiting iron ring 4, the shape of the butterfly support plate 1 can be any shape, the lower end of the anchor cable 6 is at a certain distance from the upper end of the through groove 2, and effective protection and buffering can be achieved.

[0023] The length of the buffer tube 5 is greater than the thickness of the butterfly support plate 1 , and the thickness of the buffer tube 5 is greater than the lateral deformation of the top and the inclined surface of the butterfly support plate 1 under the ultimate tension state of the anchor cable 6 .

[0024] The inner diameter of the through groove 2 is equivalent to the outer diameter of the buffer tube 5. The shape of the through groove 2 can be any shape, including but not limited to a concave ring, and the shape of the buffer tube 5 can be any shape, including but not limited to a convex shape. It only needs to match the shapes of the through groove 2 and the buffer tube 5.

[0025] The top surface of the buffer tube 5 is flush with the upper surface of the through groove 2 .

[0026] The inner diameter of the annular ring formed by the limiting iron ring 4 is equivalent to the outer diameter of the anchor 7 .

[0027] The shape of the through groove 2 is adapted to the shape of the buffer tube 5 .

[0028] Working principle:

[0029] The device is connected with a buffer tube 5 by a through groove 2, and then an anchor cable 6 is inserted into the buffer tube 5 and fixed with an anchor 7, which is connected with a top fixing groove 3 at the upper end of a butterfly support plate 1.

[0030] The support plate device is used in conjunction with the anchor cable 6. When the anchor cable 6 is in the limit state, the butterfly support plate 1 is compressed and deformed, squeezing the buffer tube 5 to prevent the through-type groove 2 from directly contacting the anchor cable 6, thereby avoiding the through-type groove 2 from shearing the anchor cable 6, improving the tensile strength and maximum extension of the anchor cable 6, and improving the quality of tunnel support.

[0031] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0032] Although 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. A hard-soft combined pressure-releasing mechanism, comprising a butterfly-shaped support plate (1), characterized in that: A through groove (2) is provided inside the butterfly-shaped support plate (1), a top fixing groove (3) is provided on the upper side wall of the butterfly-shaped support plate (1), a limiting iron ring (4) is fixedly provided on the upper side wall of the top fixing groove (3), a buffer tube (5) is provided inside the through groove (2), an anchor cable (6) is longitudinally provided inside the buffer tube (5), an anchor (7) is fixedly provided outside the anchor cable (6), the lower end of the anchor (7) is clamped with the top fixing groove (3), and the side wall of the anchor (7) is clamped with the limiting iron ring (4).

2. A hard-soft combined pressure-releasing mechanism according to claim 1, characterized in that: The length of the buffer tube (5) is greater than the thickness of the butterfly support plate (1), and the thickness of the buffer tube (5) is greater than the lateral deformation of the top and the inclined surface of the butterfly support plate (1) under the ultimate tension state of the anchor cable (6).

3. The hard-soft combined pressure-releasing mechanism according to claim 1, characterized in that: The inner diameter of the through groove (2) is equivalent to the outer diameter of the buffer tube (5).

4. The hard-soft combined pressure-releasing mechanism according to claim 1, characterized in that: The top surface of the buffer tube (5) is flush with the upper surface of the through-type groove (2).

5. The hard-soft combined pressure-releasing mechanism according to claim 1, characterized in that: The inner diameter of the annular ring formed by the limiting iron ring (4) is equivalent to the outer diameter of the anchor (7).

6. The hard-soft combined pressure-releasing mechanism according to claim 1, characterized in that: The shape of the through-type groove (2) is adapted to the shape of the buffer tube (5).

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