Anchor cable withdrawing device for coal mine tunnel

Abstract

The anchor cable withdrawing device comprises a hydraulic cylinder, a clamping sleeve and a clamping base, the clamping base is fixed over a hydraulic rod through a support, the clamping sleeve is installed between the hydraulic cylinder and the clamping base, and the bottom end of the clamping sleeve is fixedly connected with the top end of a push rod of the hydraulic cylinder; a clamping groove, a containing groove and a penetrating hole are sequentially and coaxially formed in the center of the clamping sleeve from top to bottom. An inserting hole is formed in the center of the clamping sleeve, one side of the peripheral wall of the inserting hole is connected with a vertically-arranged sliding groove, a clamping block is installed in the sliding groove, a plurality of clamping teeth are vertically arranged on the side, facing the inserting hole, of the clamping block, and the clamping teeth are driven by an adjusting screw rod horizontally penetrating out of the clamping sleeve. The anchor cable withdrawing device is simple in structure and convenient to operate, anchor cable withdrawing work can be efficiently completed, the sliding groove is vertically formed along the inserting hole, anchor cables with different lengths exposed out of the bottom end of an anchor cup can be clamped and fixed, and applicability is higher.

Description

Technical Field

[0001] The utility model relates to a device for withdrawing anchor cables, in particular to a device for withdrawing anchor cables used in coal mine roadways. Background Art

[0002] Most of the support methods for coal mine roadways are bolt-net-cable support. During the face mining process, to ensure that the roof of the goaf collapses in time with the advancement of the working face, reduce the overhanging roof area behind the face, prevent roof accidents and the accumulation of gas in the goaf, the two roadways must be retreated in time with the advancement of the working face. The commonly used anchor cable withdrawal tool is a mine-used anchor cable withdrawal device, which consists of a tensioning jack and a pneumatic oil pump. However, the operation of the tensioning jack is complex. It is necessary to manually wind and fix the end of the anchor cable to the tensioning jack. For safety, a buckle and the like are also required. The operation is troublesome. Moreover, the lengths of some anchor cables leaking out of the anchor cup are limited and vary, making it difficult to fix them to the tensioning jack. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a device for withdrawing anchor cables used in coal mine 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 device for withdrawing anchor cables used in coal mine roadways includes a hydraulic cylinder, a clamping sleeve and a clamping seat. The clamping seat is fixed directly above the hydraulic rod through a bracket. The clamping sleeve is installed between the hydraulic cylinder and the clamping seat. The bottom end of the clamping sleeve is fixedly connected to the top end of the push rod of the hydraulic cylinder. A clamping groove, a receiving groove and a through hole are coaxially formed in the center of the clamping sleeve from top to bottom in sequence. An insertion hole is formed in the center of the clamping sleeve. One side of the peripheral wall of the insertion hole is connected to a vertically arranged sliding groove. A clamping block is installed in the sliding groove. A plurality of clamping teeth are vertically arranged on the side of the clamping block facing the insertion hole. The clamping teeth are driven by an adjusting screw horizontally passing through the outside of the clamping sleeve.

[0006] Further, the hydraulic cylinder is replaced by a pneumatic cylinder.

[0007] Further, the width of the clamping groove is the same as the diameter of the insertion hole.

[0008] Further, there are four brackets, and the cross-sections of all of them are L-shaped and arranged in a rectangular array. The inner sides enclose a slide rail, and the clamping sleeve runs along the slide rail formed by the inner sides of the brackets.

[0009] Further, the clamping sleeve is cylindrical. A rectangular block is convexly arranged on one side of the peripheral wall for arranging the sliding groove, and the rectangular block is in contact and sliding fit with the slide rail. Rectangular clamping plates are arranged at the upper and lower ends on the other side of the clamping sleeve for guiding the movement along the slide rail.

[0010] Further, a handle is connected between the hydraulic cylinder and the clamping seat.

[0011] Advantages of the utility model:

[0012] The utility model has a simple structure and convenient operation, and can efficiently complete the work of withdrawing the anchor cable. Moreover, the sliding groove is vertically arranged along the insertion hole, so the anchor cables with different lengths leaking out from the bottom end of the anchor cup can be clamped and fixed, and the applicability is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional schematic diagram of the utility model;

[0014] Figure 2 is a three-dimensional sectional view of the utility model;

[0015] Figure 3 is a schematic diagram of the working principle of the utility model.

[0016] In the figure, 1 - hydraulic cylinder, 11 - bracket, 12 - handle, 2 - clamping seat, 21 - clamping groove, 22 - accommodating groove, 23 - mounting hole, 3 - jacket, 31 - insertion hole, 32 - sliding groove, 33 - clamping block, 331 - clamping teeth, 34 - adjusting screw, 35 - rectangular block, 36 - rectangular clamping plate, 4 - anchor cable, 41 - anchor cup, 42 - card. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following further describes the specific embodiments of the utility model with reference to the drawings. It should be noted here that the description of these embodiments is for helping to 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.

[0018] As shown in the figure:

[0019] An anchor cable withdrawing device for a coal mine roadway includes a hydraulic cylinder 1, a jacket 3 and a clamping seat 2. The clamping seat 2 is fixed above the hydraulic rod through a bracket 11. The jacket 3 is installed between the hydraulic cylinder 1 and the clamping seat 2, and the bottom end of the jacket 3 is fixedly connected to the top end of the push rod of the hydraulic cylinder 1. The center of the jacket 3 is coaxially provided with a clamping groove 21, an accommodating groove 22 and a mounting hole 23 from top to bottom in sequence. An insertion hole 31 is opened in the center of the jacket 3. One side of the peripheral wall of the insertion hole 31 is connected to a vertically arranged sliding groove 32. A clamping block 33 is installed in the sliding groove 32. A plurality of clamping teeth 331 are vertically arranged on the side of the clamping block 33 facing the insertion hole 31, and the clamping teeth 331 are driven by an adjusting screw 34 horizontally passing through the outside of the jacket 3.

[0020] Workflow: When performing the withdrawal of cable anchor 4, the part of the bottom end of cable anchor 4 that protrudes from the anchor cup 41 is passed through the mounting hole 23 of the clamping seat 2 and down into the jack 31 of the clamping seat 2 until the anchor cup 41 enters the card slot 21 of the clamping seat 2. At this time, the adjusting screw 34 is used to push the block 33 in the chute 32 to move and hold against the cable anchor 4, and the locking teeth 331 will ensure the stability of the fixation. Then, the hydraulic cylinder 1 is started, or a pneumatic cylinder can also be used (the hydraulic system or pneumatic system adopts the existing technology), so as to drive the jacket 3 to move downward. The jacket 3 will pull the cable anchor 4 downward, and the anchor cup 41 will be stuck in the card slot 21, thus fixing the anchor cup 41, causing the cable anchor 4 to drive the card 42 in the anchor cup 41 to move downward (the accommodation groove 22 provides the downward space, and generally only needs to be pulled by 1 - 2 cm to be disengaged). Since the card is wedge-shaped, it will be disengaged after moving downward, thus completing the separation of the anchor cup 41, the card, and the cable anchor 4.

[0021] As one of the optimized solutions, the width of the card slot 21 is the same as the diameter of the jack 31, so that the block 33 can provide a larger contact surface and increase the fixing force.

[0022] As the second optimized solution, there are four brackets 11, and the cross-sections are all L-shaped, arranged in a rectangular array. The inner sides enclose a slide rail, and the jacket 3 runs along the slide rail formed by the inner sides of the brackets 11, which can increase the smoothness of the movement of the jacket 3 and prevent it from shaking during the movement.

[0023] As the second optimized solution, the jacket 3 is cylindrical. A rectangular block 35 is protrudingly provided on the peripheral wall of one side for setting the chute 32, and the rectangular block 35 is in sliding contact with the slide rail. On the other side of the jacket 3, rectangular clamping plates 36 are provided at the upper and lower ends for guiding the movement along the slide rail. In this way, the processing is relatively convenient, and it can be connected into one body by welding. At the same time, a handle 12 can be connected between the hydraulic cylinder 1 and the clamping seat 2 for convenient operation.

[0024] The above has described the embodiments of the present utility model in detail 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. An anchor cable withdrawal device for coal mine tunnels, characterized in that: It includes a hydraulic cylinder, a jacket and a holder, the holder is fixed above the hydraulic rod by a bracket, the jacket is installed between the hydraulic cylinder and the holder, and the bottom end of the jacket is fixedly connected to the top end of the push rod of the hydraulic cylinder; the center of the jacket is coaxially provided with a slot, a receiving slot and a mounting hole from top to bottom; the center of the jacket is provided with a plug hole, one side of the peripheral wall of the plug hole is connected with a vertically arranged slide groove, a card block is installed in the slide groove, and a plurality of teeth are vertically arranged on the side of the card block facing the plug hole, and the teeth are driven by an adjusting screw rod horizontally passing through the outside of the jacket.

2. The anchor cable withdrawal device for coal mine tunnel according to claim 1, characterized in that: The hydraulic cylinder is replaced by a pneumatic cylinder.

3. The anchor cable withdrawal device for coal mine tunnel according to claim 1, characterized in that: The width of the card slot is consistent with the diameter of the insertion hole.

4. The anchor cable withdrawal device for coal mine tunnel according to claim 1, characterized in that: There are four brackets, all of which have L-shaped cross sections and are arranged in a rectangular array. The inner sides of the brackets are surrounded by a slide rail, and the jacket runs along the slide rail formed on the inner sides of the brackets.

5. The anchor cable withdrawal device for coal mine tunnel according to claim 4, characterized in that: The jacket is cylindrical, and a rectangular block is protruding from the peripheral wall on one side for setting a slide groove, and the rectangular block slides in contact with the slide rail for sliding. Rectangular clamping plates are set at the upper and lower ends of the other side of the jacket for guiding movement along the slide rail.

6. The anchor cable withdrawal device for coal mine tunnel according to any one of claims 1 to 5, characterized in that: A handle is connected between the hydraulic cylinder and the clamping seat.

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