Extensible anchor rod for slope support

Abstract

The extendable anchor rod comprises a main rod body and an auxiliary rod body penetrating through the interior of the main rod body, an assembly plate is arranged in the main rod body, a protruding strip located in a groove of the assembly plate is arranged on the periphery of the auxiliary rod body, and the protruding strip moves up and down in the assembly plate to adjust the length of the main rod body. The overall length of the anchor rod is adjustable, the contact area between the anchor rod and the interior of a slope is increased, the stability of the anchor rod in the slope is improved, and the supporting effect and the supporting effect are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of anchor rod, specifically relates to a extendible anchor rod for slope support. BACKGROUND

[0002] Anchor rod is the rod system structure of geotechnical body reinforcement, is the most basic component part of roadway support in contemporary underground mining, can also be used in construction engineering technology, tunnel, slope construction.

[0003] At present, in the construction process of slope support, different length anchor rods are used for slope reinforcement, a plurality of specifications of anchor rods need to be prepared in advance for standby, and the preparation process and construction time are long; meanwhile, the stability of the existing anchor rod bottom end after construction is poor, and the slope support effect is reduced. UTILITY MODEL CONTENT

[0004] The utility model discloses a extendible anchor rod for slope support, through setting up the secondary rod body that can move up and down in the inside of the main rod body, the overall length of anchor rod is lengthened, and the stability and support effect are enhanced through setting up the reinforcing rod and spring at the bottom of anchor rod.

[0005] To solve the above technical problems, the utility model adopts the following scheme:

[0006] A extendible anchor rod for slope support, including main rod body and the secondary rod body that passes through the inside of main rod body, the inside of main rod body is provided with assembly plate, the outer periphery of secondary rod body is provided with the convex strip in the recess groove of assembly plate, and the length of main rod body is adjusted through the up and down movement of convex strip in assembly plate.

[0007] The technical concept of the application is to set up the secondary rod body in the inside of the main rod body, the secondary rod body moves up and down under the condition of external thrust, thereby lengthening or shortening the length of the main rod body, i.e. the overall length of anchor rod, the demand of different length anchor rods can be met, and a plurality of length specifications of anchor rods need not be prepared in advance for standby, and the preparation time and construction time are saved, wherein the movement of the secondary rod body in the inside of the main rod body is mainly realized through the assembly of the convex strip in the recess groove of the assembly plate, and the length of the secondary rod body is greater than the length of the main rod body. Figure 2 So that the length is adjusted conveniently, and deviation is prevented during the adjustment process.

[0008] Further, the length of the secondary rod body is greater than the length of the main rod body, and the upper portion and the lower portion of the secondary rod body pass through the top end and the bottom end of the main rod body respectively.

[0009] Further, the convex strips are uniformly distributed on the outer periphery of the lower portion of the secondary rod body, the bottom end of the convex strip is provided with a limiting block, and the length of the limiting block is greater than the width of the recess groove.

[0010] Further, a plurality of accommodating cavities with openings are arranged in the groove, and a rotatable steel ball is arranged in the accommodating cavities.

[0011] Further, the outer diameter of the steel ball is smaller than the inner diameter of the accommodating cavity.

[0012] Further, the spacing of the openings of the accommodating cavities is smaller than the outer diameter of the steel ball.

[0013] Further, a plurality of inclined reinforcing rods are arranged on the outer periphery of the lower part of the secondary rod body, and a spring is arranged at the end of the reinforcing rod away from the secondary rod body and connected with the bottom end of the primary rod body.

[0014] Further, a plurality of connecting rods are arranged between the reinforcing rods and the secondary rod body.

[0015] Further, a pressing disc is arranged on the top of the primary rod body, and a foot nail for limiting is arranged on the bottom of the pressing disc.

[0016] Further, the upper part of the secondary rod body is provided with external threads and a nut is arranged to contact the surface of the pressing disc.

[0017] In the utility model, the lower rod body is moved downwards to the reserved hole position, the movement of the convex strip in the groove of the assembly plate makes the steel ball roll in the accommodating cavity, thereby reducing the friction when the convex strip moves, conveniently moving and prolonging the service life of the anchor rod, prolonging the overall length of the anchor rod and reducing the preparation time; the reinforcing rod is stretched during the movement process, the bottom end of the lower rod body increases the contact area with the inner side of the slope, increases the stability of the anchor rod in the slope and enhances the supporting effect and supporting role. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the utility model;

[0019] Figure 2 It is a top view structural schematic view of the utility model;

[0020] Figure 3 It is a top view structural schematic view of the assembly plate of the utility model.

[0021] The figure sign: 1-primary rod body, 10-assembly plate, 11-groove, 12-accommodating cavity, 13-steel ball, 2-secondary rod body, 20-upper part, 200-external thread, 21-lower part, 210-convex strip, 211-limiting block, 3-pressing disc, 4-foot nail, 5-nut, 6-reinforcing rod, 7-connecting rod, 8-spring. DETAILED DESCRIPTION

[0022] The utility model will be further explained in detail in combination with examples and drawings, but the implementation mode of the utility model is not limited to this.

[0023] In the description of the utility model, it needs to be explained that, the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0024] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "open", "install", "connect", "connect" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] Embodiment 1

[0026] The embodiment 1 of the utility model is a kind of extendable anchor rod for slope support, including main rod body 1 and the secondary rod body 2 of the inside of main rod body 1, the inside of main rod body 1 is provided with assembly plate 10, the outer periphery of secondary rod body 2 is provided with convex strip 210 in the recess 11 of assembly plate 10, the length of main rod body 1 is adjusted by the up and down movement of convex strip 210 in assembly plate 10.

[0027] Refer to Figure 1 The technical concept of the present application is to set secondary rod body 2 in the inside of main rod body 1, secondary rod body 2 moves up and down under the condition of external thrust, so as to lengthen or shorten the length of main rod body 1, i.e. the overall length of anchor rod, to meet the demand of anchor rod of different length, without the need to prepare anchor rod of multiple length specifications in advance, saving preparation time and construction time;The movement of secondary rod body 2 in the inside of main rod body 1 is mainly realized by the assembly of convex strip 210 in the recess 11 of assembly plate 10, refer to Figure 2 So as to facilitate length adjustment, prevent deviation during adjustment.

[0028] In some preferred embodiments, the length of the secondary rod 2 is greater than that of the primary rod 1, and the upper portion 20 and the lower portion 21 of the secondary rod 2 pass through the top end and the bottom end of the primary rod 1, respectively. In the extendable anchor rod of the present application, the secondary rod 2 mainly functions to adjust the length, the primary rod 1 mainly functions to protect the outside of the secondary rod 2, and finally, after the slope support is completed, the overall support function of the anchor rod is improved.

[0029] In some preferred embodiments, the protrusions 210 are uniformly distributed on the outer periphery of the lower portion 21 of the secondary rod 2, and the bottom end of the protrusion 210 is provided with a limiting block 211, and the length of the limiting block 211 is greater than the width of the groove 11.

[0030] The number of protrusions 210 is set according to actual needs, and a limiting block 211 is arranged at the bottom end of the protrusion 210, so as to limit the bottom of the lower rod during movement of the secondary rod 2, limit the minimum adjustment length range of the lower rod, and prevent the entire lower rod from entering the inside of the primary rod 1.

[0031] In addition, a plurality of accommodating cavities 12 with openings are arranged in the groove 11, and a rotatable steel ball 13 is arranged in the accommodating cavity 12. The outer diameter of the steel ball 13 is smaller than the inner diameter of the accommodating cavity 12.

[0032] Referring to Figure 3 The accommodating cavity 12 is arranged and the steel ball 13 is arranged in the accommodating cavity 12, so that the protrusion 210 arranged on the lower portion 21 of the lower rod contacts the steel ball 13 in the groove 11. When the lower rod moves downward, the steel ball 13 is rolled in the accommodating cavity 12, thereby reducing the friction of the protrusion 210 during movement, facilitating movement and prolonging the service life of the anchor rod.

[0033] In order to limit the rolling of the steel ball 13 in the accommodating cavity 12 and prevent it from falling off, the spacing at the opening of the accommodating cavity 12 is smaller than the outer diameter of the steel ball 13. This spacing can be set according to actual conditions, as long as the rolling and anti-falling off are met.

[0034] Embodiment 2

[0035] This embodiment 2 is implemented on the basis of embodiment 1, a plurality of inclined reinforcing rods 6 are arranged on the outer periphery of the lower portion 21 of the secondary rod 2, and the end of the reinforcing rod 6 away from the secondary rod 2 is provided with a spring 8 connected with the bottom end of the primary rod 1.

[0036] In order to enhance the stability of the bottom of the anchor rod in the slope during supporting, the inclined reinforcing rod 6 and the spring 8 are arranged to connect the lower part 21 of the secondary rod body 2 and the bottom end of the primary rod body 1 respectively, and the spring 8 can be stretched and elastically deformed during length adjustment, so as to ensure the connection between the primary rod body 1 and the secondary rod body 2; the inclined reinforcing rod 6 can increase the contact area between the bottom of the lower rod body and the inside of the slope, thereby greatly enhancing the supporting effect and supporting action. The included angle between the reinforcing rod 6 and the lower rod body is arranged according to the actual situation.

[0037] In some preferred embodiments, a plurality of connecting rods 7 are arranged between the reinforcing rod 6 and the secondary rod body 2.

[0038] Connecting rod 7

[0039] The connecting rod 7 is used to strengthen the connection between the lower rod body and the reinforcing rod 6, and to prevent deformation during supporting. The reinforcing rod 6, the spring 8 and the connecting rod 7 are all connected by welding, thereby improving the connection firmness, and the number of the connecting rods 7 is selected according to the actual situation.

[0040] In order to enhance the installation between the top of the anchor rod and the surface of the slope, the top of the primary rod body 1 is provided with a pressure plate 3, the bottom of the pressure plate 3 is provided with a foot nail 4 for limiting, and the outer periphery of the upper part 20 of the secondary rod body 2 is provided with an outer thread 200 and is sleeved with a nut 5 in contact with the surface of the pressure plate 3.

[0041] Specifically, the foot nail 4 is used to penetrate into the surface of the slope below, to stabilize the position of the anchor rod in the slope, to make the pressure plate 3 contact the surface of the slope, and to make the upper part 20 of the secondary rod body 2 threadedly connect the nut 5 in contact with the surface of the pressure plate 3, so that the nut 5 exerts a pressing action on the pressure plate 3, the pressure plate 3 is tightly pressed against the slope, the installation of the anchor rod in the slope is enhanced, and the supporting effect on the slope is improved, without the need for secondary re-supporting.

[0042] The working principle of the utility model is as follows: in use, according to the requirement, the lower rod body is moved downward to the reserved hole position, the convex strip 210 moves in the recess groove 11 of the assembling plate 10, the steel ball 13 rolls in the containing cavity 12, thereby reducing the friction force during the movement of the convex strip 210, conveniently moving and prolonging the service life of the anchor rod, prolonging the overall length of the anchor rod and reducing the preparation time; the reinforcing rod 6 stretches the spring 8 during the movement process, the bottom end of the lower rod body increases the contact area with the inside of the slope, the stability of the anchor rod in the slope is increased, and the supporting effect and supporting action are enhanced.

[0043] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form, and any simple modification, equivalent replacement and improvement of the above embodiment according to the technical essence of the utility model still belongs to the protection scope of the utility model technical scheme within the spirit and principles of the utility model.

Claims

1. An extendable rock bolt for use in slope support, characterized in that, The utility model relates to a telescopic rod, which comprises a main rod body (1) and a secondary rod body (2) penetrating through the inside of the main rod body (1), wherein the inside of the main rod body (1) is provided with an assembly plate (10), the outer periphery of the secondary rod body (2) is provided with a convex strip (210) located in the groove (11) of the assembly plate (10), and the convex strip (210) moves up and down in the assembly plate (10) to adjust the length of the main rod body (1).

2. The extendable rock bolt for slope support according to claim 1, wherein The length of the secondary rod body (2) is greater than that of the main rod body (1), and the upper part (20) and the lower part (21) of the secondary rod body (2) penetrate through the top end and the bottom end of the main rod body (1) respectively.

3. The extendable rock bolt for slope support according to claim 1, wherein The convex strips (210) are uniformly distributed on the outer periphery of the lower part (21) of the secondary rod body (2), the bottom end of the convex strip (210) is provided with a limiting block (211), and the length of the limiting block (211) is greater than the width of the groove (11).

4. The extendable rock bolt for slope support according to claim 1, wherein A plurality of containing cavities (12) with openings are arranged in the groove (11), and the containing cavities (12) are provided with rotatable steel balls (13).

5. The extendable rock bolt for use in slope support according to claim 4, wherein The outer diameter of the steel ball (13) is smaller than the inner diameter of the containing cavity (12).

6. The extendable rock bolt for slope support according to claim 4, wherein The spacing of the openings of the containing cavities (12) is smaller than the outer diameter of the steel ball (13).

7. The extendable rock bolt for slope support according to claim 4, wherein A plurality of inclined reinforcing rods (6) are arranged on the outer periphery of the lower part (21) of the secondary rod body (2), and the end of the reinforcing rod (6) away from the secondary rod body (2) is provided with a spring (8) connected with the bottom end of the main rod body (1).

8. The extendable rock bolt for use in slope support according to claim 7, wherein A plurality of connecting rods (7) are arranged between the reinforcing rod (6) and the secondary rod body (2).

9. The extendable rock bolt for use in slope support according to claim 7, wherein The top of the main rod body (1) is provided with a pressure plate (3), and the bottom of the pressure plate (3) is provided with a foot nail (4) for limiting.

10. The extendable rock bolt for use in slope support according to claim 7, wherein The outer periphery of the upper part (20) of the secondary rod body (2) is provided with an external thread (200) and a nut (5) is sleeved to contact the surface of the pressure plate (3).

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