Grouting anchor cable for coal mine tunnel support

Abstract

The utility model provides a coal mine tunnel support grouting anchor cable which comprises a sealing piece arranged outside a hollow grouting anchor cable in a sleeving mode, the sealing piece is sleeved with a supporting pipe screwed with a tray in a sleeving mode, the outer end of the supporting pipe is sleeved with an adjusting cylinder, and the inner end of the sealing piece is provided with an expansion head connected with the inner end of the supporting pipe in an inserted mode. A threaded section clamped with the supporting pipe in a sliding mode is arranged at the outer end of the sealing piece, and the threaded section is screwed with the adjusting cylinder. The adjusting cylinder is rotated to drive the sealing piece to move outwards as a whole, so that the inner end of the supporting pipe is inserted into the expansion head, a drilled hole is sealed and the hollow grouting anchor cable is clamped, wrapped and fixed through deformation of the expansion head, and the hollow grouting anchor cable fixing device has the advantage of being easy and convenient to operate.

Description

Technical Field

[0001] The present application relates to the technical field of coal mine tunnel support, and in particular to a coal mine tunnel support grouting anchor cable. Background Art

[0002] At present, hollow grouting anchor cables are commonly used tools for supporting coal mine tunnels. After being inserted into the borehole, the hollow grouting anchor cable needs to be sealed with a grouting plug to increase the grouting pressure, so that the cement slurry fills the borehole and diffuses into the rock cracks around the hole wall, thus achieving deep hole anchoring. However, since the inner wall of the borehole at the end of the borehole is not very flat, leakage occurs due to the gap between the grouting plug and the inner wall of the hole. For this reason, the inventor proposes a grouting anchor cable for supporting coal mine tunnels. Utility Model Content

[0003] The purpose of the present application is to provide a coal mine tunnel support grouting anchor cable, which can fix the hollow grouting anchor cable while closing the drill hole, and has the advantage of easy operation.

[0004] The embodiment of the present application is implemented as follows:

[0005] The present application provides a coal mine tunnel support grouting anchor cable, comprising a seal sleeved on the outside of a hollow grouting anchor cable, the outside of the seal is sleeved with a support tube screwed with a tray, the outer end of the support tube is sleeved with an adjustment tube, the inner end of the seal is provided with an expansion head plugged into the inner end of the support tube, the outer end of the seal is provided with a threaded section slidably engaged with the support tube, and the threaded section is screwed with the adjustment tube.

[0006] The present application drives the seal to move outward as a whole by rotating the adjustment tube, so that the inner end of the support tube is inserted into the expansion head, and the deformation of the expansion head is used to close the borehole and clamp and fix the hollow grouting anchor cable, which has the advantage of simple operation.

[0007] In an alternative embodiment, the expansion head is configured in a ring shape that is coaxially arranged with the sealing member.

[0008] In an optional embodiment, a V-shaped groove for inserting the support tube is provided on the expansion head.

[0009] In an optional embodiment, the width of the card slot decreases from the outside to the inside.

[0010] In an optional embodiment, the two side walls of the slot are symmetrically arranged.

[0011] In an optional embodiment, the expansion head and the sealing element are an integral structure.

[0012] In an optional embodiment, a limiting ring for blocking the adjusting cylinder is screwed onto the supporting tube.

[0013] In an optional embodiment, an outer end of the support tube is provided with an avoidance groove for accommodating the threaded segment.

[0014] In an optional embodiment, the avoidance grooves are evenly distributed along the circumference of the support tube.

[0015] In an alternative embodiment, the thread segments are configured in a fan shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described below are only used to explain the present application, rather than to limit the scope of the present application. In the accompanying drawings:

[0017] Figure 1 is a schematic diagram of a grouting anchor cable for supporting a coal mine tunnel according to an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of the installation of a seal according to an embodiment of the present application;

[0019] Figure 3 is a cross-sectional view of a coal mine tunnel support grouting anchor cable according to an embodiment of the present application;

[0020] Reference numerals:

[0021] 10. Hollow grouting anchor cable;

[0022] 20. Seals;

[0023] 30. Support pipe;

[0024] 40. Pallet;

[0025] 50. Adjustment cylinder;

[0026] 11. Cable body;

[0027] 12. Grouting pipe;

[0028] 21. Threaded section;

[0029] 22. Expansion head;

[0030] 23. Card slot;

[0031] 31. Avoidance slot;

[0032] 32. Limiting ring. DETAILED DESCRIPTION

[0033] Example 1

[0034] See also Figure 1-Figure 3 The present embodiment provides a coal mine tunnel support grouting anchor cable to solve the leakage problem of the existing hollow grouting anchor cable due to the poor sealing between the grout stopper and the inner wall of the borehole during use.

[0035] In this embodiment, the coal mine tunnel support grouting anchor includes a seal 20 sleeved on the outside of the hollow grouting anchor 10, the outside of the seal 20 is sleeved with a support tube 30 screwed with the tray 40, the outer end of the support tube 30 is sleeved with an adjusting cylinder 50, the inner end of the seal 20 is provided with an expansion head 22 plugged into the inner end of the support tube 30, the outer end of the seal 20 is provided with a threaded section 21 slidably engaged with the support tube 30, and the threaded section 21 is screwed with the adjusting cylinder 50.

[0036] In this embodiment, the seal 20 is driven to move outward as a whole by rotating the adjustment tube 50, so that the inner end of the support tube 30 is inserted into the expansion head 22, and the deformation of the expansion head 22 is used to close the borehole and clamp and fix the hollow grouting anchor 10, which has the advantage of simple operation.

[0037] It should be noted that the hollow grouting anchor cable 10 is a prior art, which mainly includes a cable body 11 wound around and wrapped around the outside of a grouting pipe 12. The grouting pipe 12 and the cable body 11 form an integral structure. The outer end of the grouting pipe 12 is a grouting port, and the inner end is a grouting outlet.

[0038] In addition, the seal 20 is constructed as a hollow tubular structure as a whole. The seal 20 is integrally mounted on the outside of the hollow grouting anchor 10. An annular expansion head 22 is integrally formed at the inner end of the seal 20, and the expansion head 22 and the seal 20 are coaxially arranged. The outer diameter of the expansion head 22 is larger than the outer diameter of the support tube 30. A V-shaped groove 23 is provided on the outer end surface of the expansion head 22, and the width of the groove 23 decreases from the outside to the inside. The two side walls of the groove 23 are symmetrically arranged. The groove 23 corresponds to the inner end of the support tube 30 sleeved on the outside of the seal 20. A fan-shaped threaded section 21 is integrally formed at the outer end of the seal 20. The threaded section 21 and the seal 20 are coaxially arranged, and the threaded section 21 is evenly distributed along the circumference of the seal 20. The outer diameter of the threaded section 21 is larger than the outer diameter of the seal 20. A thread is provided on the outer surface of the threaded section 21. The threaded section 21 is used to be screwed and connected with the adjustment cylinder 50 sleeved on the outside of the support tube 30.

[0039] It should be noted that the sealing member 20 , the threaded section 21 and the expansion head 22 are made of rubber, and the expansion head 22 can be deformed after being squeezed.

[0040] In addition, the tray 40 is screwed onto the outside of the support tube 30, and the tray 40 and the support tube 30 are coaxially arranged. A limit ring 32 is screwed onto the support tube 30 outside the tray 40. The adjustment cylinder 50 is integrally sleeved on the outside of the support tube 30, and the adjustment cylinder 50 can be rotatably clamped between the limit ring 32 and the tray 40. An avoidance groove 31 for accommodating the threaded segment 21 is opened at the outer end of the support tube 30. The avoidance groove 31 extends along the axial direction of the support tube 30 as a whole, and the avoidance groove 31 corresponds to the threaded segment 21 one by one. The threaded segment 21 can be slidably clamped inside the avoidance groove 31 along the axial direction of the support tube 30 as a whole, and the outer surface of the threaded segment 21 is screwed together with the inner circumferential surface of the adjustment cylinder 50.

[0041] When in use, the adjusting cylinder 50 is rotated, and the sealing member 20 is moved outward as a whole by utilizing the sliding engagement between the threaded section 21 and the avoidance groove 31. The inner end of the support tube 30 is continuously inserted into the engagement groove 23, and the expansion head 22 is deformed under the extrusion of the support tube 30, so that the outer wall of the expansion head 22 fits tightly against the inner wall of the borehole. At the same time, the inner wall of the expansion head 22 fits tightly against the outer wall of the hollow grouting anchor 10, so that the borehole and the hollow grouting anchor 10 can be sealed and the hollow grouting anchor 10 can be clamped and fixed.

[0042] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A coal mine tunnel support grouting anchor cable, characterized in that: It includes a seal that is sleeved on the outside of the hollow grouting anchor cable, the outside of the seal is sleeved with a support tube that is screwed with the tray, the outer end of the support tube is sleeved with an adjustment tube, the inner end of the seal is provided with an expansion head that is plugged into the inner end of the support tube, the outer end of the seal is provided with a threaded section that is slidably engaged with the support tube, and the threaded section is screwed with the adjustment tube.

2. The coal mine tunnel support grouting anchor cable according to claim 1, characterized in that: The expansion head is configured in a ring shape coaxially arranged with the sealing member.

3. The coal mine tunnel support grouting anchor cable according to claim 2, characterized in that: The expansion head is provided with a V-shaped groove for inserting the support tube.

4. The coal mine tunnel support grouting anchor cable according to claim 3, characterized in that: The width of the card slot decreases from outside to inside.

5. The coal mine tunnel support grouting anchor cable according to claim 4, characterized in that: The two side walls of the slot are arranged symmetrically.

6. The coal mine tunnel support grouting anchor cable according to claim 5, characterized in that: The expansion head and the sealing element are an integral structure.

7. The coal mine tunnel support grouting anchor cable according to claim 6, characterized in that: A limiting ring for blocking the adjusting cylinder is screwed onto the supporting tube.

8. The coal mine tunnel support grouting anchor cable according to claim 7, characterized in that: The outer end of the support tube is provided with an avoidance groove for accommodating the threaded section.

9. The coal mine tunnel support grouting anchor cable according to claim 8, characterized in that: The avoidance grooves are evenly distributed along the circumference of the support tube.

10. The coal mine tunnel support grouting anchor cable according to claim 9, characterized in that: The thread segments are configured in a fan shape.

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