Anchor cable supporting device for coal mine underground roadway

Abstract

The anchor cable supporting device comprises an anchor cable, an anchor cup and a plurality of wedge-shaped clamping pieces, the top of the peripheral wall of the anchor cup is provided with a concave limiting part, and the tail end of the anchor cup is a cylindrical section and is provided with external threads; a through groove with the diameter larger than that of the anchor cable is formed in the top end in the anchor cup, the lower portion of the through groove is connected with a circular truncated cone groove penetrating through the bottom of the anchor cup, the anchor cable is inserted into the anchor cup, and the wedge-shaped clamping piece is inserted between the circular truncated cone groove and the anchor cable. And the anchor cup is equally divided into more than two parts along the axial direction, is fixed at the limiting part through a detachable fastener, and is locked at the tail end through a threaded sleeve. When the anchor cable needs to be detached, only the threaded sleeve needs to be detached firstly, then the fastener needs to be detached, the anchor cup is divided into several parts after the fastener is loosened, the wedge-shaped clamping piece is automatically separated, and the anchor cable can be operated by a single person with the help of a simple tool.

Description

Technical Field

[0001] The utility model relates to the technical field of mine fixed equipment, in particular to a cable bolt support device for coal mine underground roadways. Background Art

[0002] Most of the support methods for coal mine roadways are bolt-net-cable support. During the working face coal mining process, to ensure that the roof of the goaf collapses in time with the advance of the working face, reduce the hanging roof area behind the face, prevent roof accidents and the accumulation of goaf gas, the two roadways must be retreated from the anchor in time with the advance of the working face. The cable bolt is fixed by an anchor cup and a wedge-shaped clip. Under the tension of the cable bolt, the wedge-shaped clip will tightly embed between the anchor cup and the cable bolt to complete locking. Due to the large tension of the cable bolt, the wedge-shaped clip will be embedded very deep. Currently, the adopted method is to use a jack to top the anchor cup and then pull the cable bolt outward forcefully to complete the operation of retreating the anchor. It often needs to rely on a jack or a hydraulic device to complete, with cumbersome operation and heavy equipment, making it difficult for a single person to complete. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a cable bolt support device for coal mine underground roadways to solve the technical problems in the above background art.

[0004] To solve the above technical problems, the technical solution of the utility model is as follows:

[0005] A cable bolt support device for coal mine underground roadways includes a cable bolt, an anchor cup and a plurality of wedge-shaped clips. The top of the circumferential wall of the anchor cup has a concave limiting part, and the tail end is a cylindrical section and is provided with an external thread; at the inner top of the anchor cup, a through groove with a diameter larger than that of the cable bolt is opened, and the lower part of the through groove is connected to a frustum groove penetrating the bottom of the anchor cup. The cable bolt is inserted into the anchor cup, and the wedge-shaped clip is inserted between the frustum groove and the cable bolt; the anchor cup is axially divided into two or more parts, fixed by a detachable fastener at the limiting part, and locked by a threaded sleeve at the tail end.

[0006] Further, the top of the anchor cup has an equal-diameter section, the diameter of the equal-diameter section is smaller than that of the cylindrical section, and the equal-diameter section is connected to the cylindrical section through a frustum section. The outer edge of the top of the anchor cup is provided with a convex ring, and the convex ring and the frustum section enclose the equal-diameter section to form a limiting part.

[0007] Further, the convex ring expands outward to be larger than the diameter of the cylindrical section of the anchor cup, thus forming a top plate.

[0008] Further, the fastener includes two semi-circular snap rings, and both ends of the semi-circular snap rings are provided with threaded ear plates, and the ear plates are respectively fixed together by internal hexagon bolts.

[0009] Further, a plurality of jack holes are evenly opened on the circumferential wall of the threaded sleeve.

[0010] The advantages of the utility model are as follows:

[0011] When the anchor cable of the utility model needs to be disassembled, only the threaded sleeve needs to be disassembled first, and then the fastener can be disassembled. After the fastener is loosened, the anchor cup is divided into several parts, and the wedge-shaped clamping pieces are separated by themselves. A single person can operate with the help of simple tools. The fastener includes two semi-circular snap rings. Threaded ear plates are provided at both ends of the semi-circular snap ring, and the ear plates are respectively fixed together by inner hexagon bolts. Since the anchor cup abuts against the wall during installation, the operating space is limited, and the inner hexagon bolts are more convenient to operate. Description of the Drawings

[0012] Figure 1 is a three-dimensional schematic diagram of the utility model;

[0013] Figure 2 is a cross-sectional view of the utility model.

[0014] In the figure, 1 - anchor cup, 11 - equal-diameter section, 12 - frustum section, 13 - cylindrical section, 14 - top plate, 15 - through groove, 16 - frustum groove, 2 - fastener, 21 - semi-circular snap ring, 22 - ear plate, 23 - inner hexagon bolt, 3 - threaded sleeve, 31 - jack, 4 - anchor cable, 5 - wedge-shaped clamping piece. Detailed Embodiments

[0015] The following further describes the detailed embodiments of the utility model with reference to the drawings. It should be noted here that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation to the utility model. In addition, the technical features involved in the various embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0016] As shown in the figure:

[0017] An anchor cable 4 support device for coal mine underground roadway includes an anchor cable 4, an anchor cup 1 and a plurality of wedge-shaped clamping pieces 5. The top of the peripheral wall of the anchor cup 1 has a concave limiting part, and the tail end is a cylindrical section 13 and is provided with an external thread; a through groove 15 with a diameter larger than that of the anchor cable 4 is opened at the inner top end of the anchor cup 1, and the lower part of the through groove 15 is connected to a frustum groove 16 penetrating the bottom of the anchor cup 1. The anchor cable 4 is inserted into the anchor cup 1, and the wedge-shaped clamping pieces 5 are inserted between the frustum groove 16 and the anchor cable 4; the anchor cup 1 is axially divided into two or more parts, and is fixed by a detachable fastener 2 at the limiting part and locked by a threaded sleeve 3 at the tail end.

[0018] When the utility model is installed, several parts of the anchor cup 1 are assembled together to form a whole, and then fixed to the limiting part by the fastener 2. The concave limiting part can limit the sliding of the fastener 2, and then the cylindrical section 13 at the bottom of the anchor cup 1 is locked by the threaded sleeve 3. Then, the anchor cable 4 is inserted, and the wedge-shaped clamping pieces 5 are sequentially embedded into the frustum groove 16. Subsequently, under the tension of the anchor cable 4, the wedge-shaped clamping pieces 5 will be more and more embedded into the frustum groove 16 to achieve the purpose of stabilizing the anchor cable 4.

[0019] When the anchor cable 4 needs to be disassembled, only the threaded sleeve 3 needs to be disassembled first, and then the fastener 2 can be disassembled. A single person can operate with the help of simple tools. To facilitate the disassembly of the threaded sleeve 3, a number of jacks 31 are evenly arranged on the peripheral wall of the threaded sleeve 3, which is convenient for inserting a lever to rotate the threaded sleeve 3. The fastener 2 includes two semi-circular snap rings 21, and threaded ear plates 22 are provided at both ends of the semi-circular snap ring 21. The ear plates 22 are respectively fixed together by the hexagon socket head bolts 23. Since the anchor cup 1 abuts against the wall during installation, the operating space is limited, and the hexagon socket head bolts 23 are more convenient to operate.

[0020] As an optimized solution, the top end of the anchor cup 1 has an equal-diameter section 11, the diameter of the equal-diameter section 11 is smaller than that of the cylindrical section 13, and the equal-diameter section 11 is connected to the cylindrical section 13 through a frustum section 12. A convex ring is provided on the outer edge of the top end of the anchor cup 1. The convex ring and the frustum section 12 enclose the equal-diameter section 11 to form a limiting part. The convex ring can also be expanded outwards to be larger than the diameter of the cylindrical section 13 of the anchor cup 1, so as to form a top plate 14, and the contact area with the wall surface is increased through the top plate 14.

[0021] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present utility model, various changes, modifications, substitutions and variations made to these embodiments still fall within the protection scope of the present utility model.

Claims

1. A cable bolt support device for underground roadways in coal mines, comprising a cable bolt, an anchor cup and a plurality of wedge-shaped clips, characterized in that: The top of the circumferential wall of the anchor cup has a concave limiting part, the tail end is a cylindrical section, and an external thread is provided; a through groove with a diameter larger than that of the anchor cable is provided at the inner top end of the anchor cup, the lower part of the through groove is connected to a frustum groove penetrating the bottom of the anchor cup, the anchor cable is inserted into the anchor cup, and the wedge-shaped clip is inserted between the frustum groove and the anchor cable; the anchor cup is axially divided into more than two parts, fixed by a detachable fastener at the limiting part, and locked by a threaded sleeve at the tail end.

2. The cable bolt support device for underground roadways in coal mines according to claim 1, characterized in that: The top end of the anchor cup has an equal-diameter section, the diameter of the equal-diameter section is smaller than that of the cylindrical section, and the equal-diameter section is connected to the cylindrical section through a frustum section. A convex ring is provided on the outer edge of the top end of the anchor cup, and the convex ring and the frustum section enclose the equal-diameter section to form a limiting part.

3. The cable bolt support device for underground roadways in coal mines according to claim 2, characterized in that: The convex ring expands outwards to be larger than the diameter of the cylindrical section of the anchor cup, thereby forming a top plate.

4. The cable bolt support device for underground roadways in coal mines according to claim 1, wherein: The fastener includes two semi-circular snap rings, threaded ear plates are provided at both ends of the semi-circular snap ring, and the ear plates are respectively fixed together by inner hexagon bolts.

5. The cable bolt support device for underground roadways in coal mines according to claim 1, characterized in that: A plurality of jacks are evenly provided on the circumferential wall of the threaded sleeve.

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