Anchor cable unanchoring device for tunnel

Abstract

The utility model provides a tunnel anchor cable anchor withdrawal device, which relates to the anchor withdrawal field, and adopts the following scheme: a fixed clamping plate is provided at the clamping end of a support plate, the fixed clamping plate is an arc plate-shaped structure, the inner side surface of the fixed clamping plate can fit with the outer circular surface of the anchor cable, a movable clamping plate is provided at the end of a force rod, the movable clamping plate is an arc plate-shaped structure, the inner side surface of the movable clamping plate can fit with the outer circular surface of the anchor cable, the movable clamping plate can be arranged at the clamping end of the support plate through a rotating shaft, the opening direction of the movable clamping plate is arranged relative to the opening direction of the fixed clamping plate, the axial direction of the rotating shaft is perpendicular to the length direction of the support plate, after being installed on the anchor cable to be withdrawn, the fixed clamping plate and the movable clamping plate are located on both sides of the anchor cable to be withdrawn, the support plate and the fixed clamping plate are located on the same side of the anchor cable to be withdrawn, the force rod and the movable clamping plate are located on the same side of the anchor cable to be withdrawn, and the length direction of the support plate is perpendicular to the axial direction of the anchor cable to be withdrawn. The utility model is not limited by the length of the exposed steel strand, is flexible to use, and has a wide range of applications.

Description

Technical Field

[0001] The utility model relates to the field of anchor withdrawal, in particular to a tunnel anchor cable anchor withdrawal device. Background Art

[0002] In coal mine roadway support, anchor cable support is a commonly used economical, safe and efficient support method, which plays an irreplaceable role in stabilizing the roadway surrounding rock. The anchor cable is composed of clips, anchor sleeves, anchor cable trays and steel strands. As one of the most important support methods, in some areas that require permanent support, anchor cables are required to provide stable and reliable anchoring. However, in some temporary support areas, such as the roadways for mining of underground working faces in coal mines, the anchor cables in the mining roadways not only need to maintain reliable anchoring before the mining of the working face and control the deformation of the roadway surrounding rock, but also need to withdraw the anchor cables in the roadways after the mining of the working face, so that the roof area of ​​the working face can collapse in time to avoid safety hazards caused by large areas of suspended roofs.

[0003] In the prior art, an anchor remover is disclosed, comprising: a through-core lock, a scissors jack, a spring stripping sleeve, an anchor remover cylinder cavity, and a hand crank, wherein the hand crank is horizontally arranged in the middle of the scissors jack, a through-core lock is arranged at the lower end of the scissors jack, and an anchor remover cylinder cavity is arranged at the upper end of the scissors jack; the specific use process is: the exposed steel strand of the anchor cable to be removed is passed through the anchor remover cylinder cavity to the bottom through-core lock, and after the anchor cable steel strand is clamped by the through-core lock, the anchor cable steel strand is made to move relative to the anchor ring by shaking the hand crank of the scissors jack, thereby separating the clip from the anchor cable steel strand to realize anchor removal and removal.

[0004] When adopting the above technical scheme, since the exposed steel strand needs to be passed through the cylinder cavity of the anchor remover to the bottom through-hole lock, when the exposed steel strand is short, the through-hole lock cannot clamp the anchor cable steel strand, and force cannot be applied to move the anchor cable steel strand. The above technical scheme cannot be used to achieve anchor removal, and the use of the above technical scheme has certain limitations. Utility Model Content

[0005] In order to solve the technical problem that the use of the anchor cable unanchoring device in the above-mentioned prior art is limited, the utility model provides a tunnel anchor cable unanchoring device, which is not limited by the length of the exposed steel strand, is flexible to use, and has a wide range of applications.

[0006] The camming device of claim 1, wherein the fixing plate is an arc-shaped structure and the fixing plate is a plurality of movable plates that can fit the outer circular surface of the anchor cable. The movable plates can be arranged on the clamping end of the support plate through a rotating shaft, and the opening direction of the movable plates is arranged opposite to the opening direction of the fixed plates. The axial direction of the rotating shaft is perpendicular to the length direction of the support plate. After being installed on the anchor cable to be withdrawn, the fixed plates and the movable plates are located on both sides of the anchor cable to be withdrawn, the support plate and the fixed plates are located on the same side of the anchor cable to be withdrawn, the force applying rod and the movable plates are both located on the other side of the anchor cable to be withdrawn, and the length direction of the support plate is perpendicular to the axial direction of the anchor cable to be withdrawn.

[0007] The utility model clamps the anchor cable to be withdrawn by a fixed clamp and a movable clamp, and the installation space is not limited by the length of the exposed steel strand. The force is applied by a force rod and the support is provided by a support plate to form a lever mechanism, and the anchor cable to be withdrawn is separated from the steel strand in the form of pulling, which is more labor-saving when used.

[0008] Furthermore, the angle between the force-applying rod and the end surface of the movable clamping plate is an acute angle, and after being installed on the anchor cable to be withdrawn, the angle between the force-applying rod and the supporting plate is an obtuse angle.

[0009] The utility model sets the included angle between the force-applying rod and the end surface of the movable clamping plate as an acute angle, so that the movement space of the force-applying rod can be guaranteed during use, which is convenient for operators to apply force.

[0010] Furthermore, the included angle between the support plate and the end face of the fixing clamping plate is an acute angle, and after being installed on the anchor cable to be withdrawn, the fixing clamping plate does not fit the wall.

[0011] The utility model sets the included angle between the support plate and the end face of the fixed clamping plate to an acute angle, so that when in use, the spacing between the fixed clamping plate and the floating clamping plate along the axial direction of the anchor cable to be withdrawn is shorter, thereby reducing the torque effect on the anchor cable to be withdrawn, converting more acting force into axial force on the anchor cable to be withdrawn, and further achieving the purpose of labor saving.

[0012] Furthermore, anti-slip protrusions are provided on the side of the support plate that contacts the wall.

[0013] The utility model can increase the friction between the support plate and the wall by arranging the anti-skid protrusions, thereby preventing slippage and failing to form a stable lever mechanism.

[0014] Furthermore, a handle is coaxially arranged at the end of the force application rod.

[0015] Furthermore, the connecting end of the handle can extend into the mounting hole of the end of the force application rod, and the end of the force application rod is provided with a locking bolt, and the locking bolt passes through the force application rod and the connecting end.

[0016] The utility model realizes the detachable connection between the handle and the force applying rod through the locking bolt, which is convenient for storing the device and reduces space occupation.

[0017] Furthermore, the support plate and the fixed clamping plate are an integrated structure, two shaft cylinders 1 are provided at the connection between the support plate and the fixed clamping plate, a gap is provided between the two shaft cylinders 1, and the rotating shaft is rotatably provided in the shaft cylinder 1.

[0018] Furthermore, the force application rod and the movable clamp are an integrated structure, a shaft cylinder 2 is provided on the movable clamp, the shaft cylinder 2 is located between two shaft cylinders 1, the rotating shaft passes through the shaft cylinder 1 and the shaft cylinder 2, and limit pins are provided at both ends of the rotating shaft.

[0019] It can be seen from the above technical solutions that the utility model has the following advantages:

[0020] The utility model provides a tunnel anchor cable withdrawing device, which is clamped on the anchor cable to be withdrawn by a fixed clamp and a movable clamp, and the installation space is not limited by the length of the exposed steel strand, and a lever mechanism is formed by applying force through a force rod and providing support through a support plate, so that the anchor cable to be withdrawn is separated from the steel strand in the form of pulling, which is more labor-saving when used; by setting the angle between the force rod and the end face of the movable clamp to an acute angle, the movement space of the force rod can be guaranteed when in use, which is convenient for operators to apply force; by setting the angle between the support plate and the end face of the fixed clamp to an acute angle, the spacing between the fixed clamp and the floating clamp along the axial direction of the anchor cable to be withdrawn is shorter when in use, the torque effect on the anchor cable to be withdrawn is reduced, and more force is converted into axial force on the anchor cable to be withdrawn, further achieving the purpose of labor saving; by setting an anti-slip protrusion, the friction between the support plate and the wall can be increased, slipping is avoided, and a stable lever mechanism cannot be formed; the detachable connection between the handle and the force rod is realized by a locking bolt, which is convenient for the storage of the device and reduces space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 The structure of the specific implementation method of the utility model is shown in FIG. Figure 1.

[0023] Figure 2 The structure of the specific implementation method of the utility model is shown in FIG. Figure 2 .

[0024] Figure 3 It is a schematic diagram of the assembly structure of the force application rod and the movable clamping plate in a specific implementation manner of the utility model.

[0025] Figure 4 It is a schematic diagram of the assembly structure of the support plate and the fixed clamping plate in a specific implementation manner of the utility model.

[0026] In the figure, 1. handle; 3. locking bolt; 4. support plate; 5. anti-slip protrusion; 6. fixed splint; 7. movable splint; 8. rotating shaft; 9. force rod. DETAILED DESCRIPTION

[0027] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0028] like Figures 1 to 4 As shown, this specific embodiment provides a tunnel anchor cable withdrawing device, including a support plate 4, a fixed splint 6, a movable splint 7 and a force applying rod 9. The clamping end of the support plate 4 is provided with a fixed splint 6, the fixed splint 6 is an arc-shaped plate-like structure, and the inner side surface of the fixed splint 6 can fit with the outer circular surface of the anchor cable. It also includes a force applying rod 9, and the end of the force applying rod 9 is provided with a movable splint 7, the movable splint 7 is an arc-shaped plate-like structure, and the inner side surface of the movable splint 7 can fit with the outer circular surface of the anchor cable. The movable splint 7 can be set at the clamping end of the support plate 4 through a rotating shaft 8, and the opening direction of the movable splint 7 is arranged opposite to the opening direction of the fixed splint 6, and the axial direction of the rotating shaft 8 is perpendicular to the length direction of the support plate 4. After being installed on the anchor cable to be withdrawn, the fixed splint 6 and the movable splint 7 are located on both sides of the anchor cable to be withdrawn, the support plate 4 and the fixed splint 6 are located on the same side of the anchor cable to be withdrawn, the force applying rod 9 and the movable splint 7 are both located on the other side of the anchor cable to be withdrawn, and the length direction of the support plate 4 is perpendicular to the axial direction of the anchor cable to be withdrawn.

[0029] When the lever 9 is in motion, the movable plate 7 is pulled outwards and the movable plate 7 is pulled back, so that the movable plate 7 and the fixed plate 6 are clamped on both sides of the anchor cable to be withdrawn, and the movable plate 7 has a tendency to move outwards of the wall with the rotation of the lever 9, thereby driving the fixed plate 6 to move outwards. In this process, the axial force on the anchor cable to be withdrawn increases continuously, and then exceeds the static friction with the steel strand, thereby achieving separation.

[0030] like Figure 1 As shown, since anchor cables are installed on the side walls and the top of the wall of the tunnel, in order to ensure that the operators can use it conveniently on all walls, in this specific embodiment, the angle between the force rod 9 and the end face of the movable clamp 7 is an acute angle, which can ensure that, after being installed on the anchor cable to be withdrawn, the angle between the force rod 9 and the support plate 4 is an obtuse angle, which can ensure the movement space of the force rod 9, and the operator can apply force by pulling the arm to the side of the body, which is convenient for operation; in this specific embodiment, after installation, the angle between the force rod 9 and the support plate 4 is 120°.

[0031] like Figure 1 and Figure 4 As shown, since the movable splint 7 rotates toward the outside of the wall as the force rod 9 rotates, the distance between it and the fixed splint 6 along the axial direction of the anchor cable to be withdrawn increases. When this distance is large, a large torque is generated, causing the anchor cable to bend. This torque is not helpful for the process of withdrawing the anchor cable. Therefore, in this specific embodiment, the angle between the support plate 4 and the end face of the fixed splint 6 is an acute angle. After being installed on the anchor cable to be withdrawn, the fixed splint 6 does not fit the wall, which is equivalent to having a distance between it and the movable splint 7 in advance. When the movable splint 7 rotates, this distance becomes smaller, and the torque effect becomes smaller, so that more force is converted into axial force on the anchor cable to be withdrawn, thereby further achieving the purpose of saving effort.

[0032] like Figure 4 As shown, the force-applying rod 9 is connected to the support plate 4 via a rotating shaft 8. When the force-applying rod 9 is rotated under force, the support plate 4 tends to slip. To prevent slipping, in this specific embodiment, an anti-slip protrusion 5 is provided on the side of the support plate 4 that contacts the wall, and the anti-slip protrusion 5 can be nailed into the wall.

[0033] like Figure 1As shown, in order to reduce the discomfort when applying force with the hands, a handle 1 is coaxially arranged at the end of the force rod 9, and the handle 1 is a waist drum-shaped structure. In order to facilitate disassembly and assembly and reduce space occupancy, in this specific embodiment, the connecting end of the handle 1 can be extended into the mounting hole at the end of the force rod 9, and a locking bolt 3 is arranged at the end of the force rod 9, and the locking bolt 3 passes through the force rod 9 and the connecting end.

[0034] In order to enhance the structural strength, in the present specific embodiment, the support plate 4 and the fixed splint 6 are an integrated structure, two shaft cylinders 1 are provided at the connection between the support plate 4 and the fixed splint 6, a gap is provided between the two shaft cylinders 1, the rotating shaft 8 is rotatably provided in the shaft cylinder 1, the force rod 9 and the movable splint 7 are an integrated structure, a shaft cylinder 2 is provided on the movable splint 7, the shaft cylinder 2 is located between the two shaft cylinders 1, the rotating shaft 8 passes through the shaft cylinder 1 and the shaft cylinder 2, and limit pins are provided at both ends of the rotating shaft 8.

[0035] The method of using this device is:

[0036] The support plate 4 is prevented from being on the upper side of the anchor cable to be withdrawn, ensuring that the fixed clamping plate 6 is located on the side of the anchor cable to be withdrawn and the clamping surface is in contact with the outer circumference of the anchor cable to be withdrawn; force is applied to the force rod 9, and the movable clamping plate 7 gradually approaches the outer circumference of the anchor cable to be withdrawn until it is tightly attached to the outer circumference of the anchor cable to be withdrawn; as the force rod 9 is continuously rotated by the force applied, the movable clamping plate 7 rotates and moves toward the outside of the wall, and drives the fixed clamping plate 6 to move toward the outside of the wall, the support plate 4 is tightly attached to the wall and cannot move, and most of the force is converted into axial force on the anchor cable to be withdrawn. When the force overcomes the static friction of the anchor cable, the anchor cable to be withdrawn is detached, and the anchor withdrawal is successful.

[0037] From the above specific implementations, it can be seen that the utility model has the following beneficial effects:

[0038] 1. The fixed clamping plate 6 and the movable clamping plate 7 are clamped on the anchor cable to be withdrawn, and the installation space is not limited by the length of the exposed steel strand. The force is applied by the force rod 9 and the support plate 4 provides support to form a lever mechanism, which separates the anchor cable to be withdrawn from the steel strand in the form of pulling, which is more labor-saving when used;

[0039] 2. By setting the included angle between the force-applying rod 9 and the end surface of the movable clamping plate 7 to an acute angle, the movement space of the force-applying rod 9 can be ensured during use, which is convenient for the operator to apply force;

[0040] 3. By setting the included angle between the end faces of the support plate 4 and the fixed clamping plate 6 to an acute angle, when in use, the distance between the fixed clamping plate 6 and the floating clamping plate along the axial direction of the anchor cable to be withdrawn is shortened, thereby reducing the torque effect on the anchor cable to be withdrawn, converting more force into axial force on the anchor cable to be withdrawn, and further achieving the purpose of labor saving;

[0041] 4. The anti-slip protrusions 5 can increase the friction between the support plate 4 and the wall to avoid slipping and the inability to form a stable lever mechanism;

[0042] 5. The handle 1 and the force-applying rod 9 are detachably connected by the locking bolt 3, which facilitates the storage of the device and reduces space occupation.

[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tunnel anchor cable unanchoring device, comprising a support plate (4), characterized in that: The clamping end of the support plate (4) is provided with a fixed clamping plate (6), the fixed clamping plate (6) is an arc-shaped plate-like structure, the inner side surface of the fixed clamping plate (6) can fit with the outer circular surface of the anchor cable to be withdrawn, and also includes a force application rod (9), the end of the force application rod (9) is provided with a movable clamping plate (7), the movable clamping plate (7) is an arc-shaped plate-like structure, the inner side surface of the movable clamping plate (7) can fit with the outer circular surface of the anchor cable to be withdrawn, and the movable clamping plate (7) can be arranged at the clamping end of the support plate (4) through a rotating shaft (8). The opening direction of the movable clamp (7) is arranged opposite to the opening direction of the fixed clamp (6), the axial direction of the rotating shaft (8) is perpendicular to the length direction of the support plate (4), and after being installed on the anchor cable to be withdrawn, the fixed clamp (6) and the movable clamp (7) are located on both sides of the anchor cable to be withdrawn, the support plate (4) and the fixed clamp (6) are located on the same side of the anchor cable to be withdrawn, the force rod (9) and the movable clamp (7) are located on the other side of the anchor cable to be withdrawn, and the length direction of the support plate (4) is perpendicular to the axial direction of the anchor cable to be withdrawn.

2. The tunnel anchor cable unanchoring device according to claim 1, characterized in that: The angle between the force-applying rod (9) and the end surface of the movable clamping plate (7) is an acute angle. After being installed on the anchor cable to be withdrawn, the angle between the force-applying rod (9) and the support plate (4) is an obtuse angle.

3. The tunnel anchor cable unanchoring device according to claim 2, characterized in that: The included angle between the support plate (4) and the end surface of the fixing clamp plate (6) is an acute angle, and after being installed on the anchor cable to be withdrawn, the fixing clamp plate (6) does not fit the wall.

4. The tunnel anchor cable unanchoring device according to claim 3, characterized in that: An anti-slip protrusion (5) is provided on the side of the support plate (4) that contacts the wall.

5. The tunnel anchor cable unanchoring device according to any one of claims 1 to 4, characterized in that: A handle (1) is coaxially arranged at the end of the force application rod (9).

6. The tunnel anchor cable unanchoring device according to claim 5, characterized in that: The connecting end of the handle (1) can be inserted into the mounting hole at the end of the force application rod (9), and the end of the force application rod (9) is provided with a locking bolt (3), and the locking bolt (3) passes through the force application rod (9) and the connecting end.

7. The tunnel anchor cable unanchoring device according to claim 6, characterized in that: The support plate (4) and the fixed clamping plate (6) are an integrated structure. Two shaft cylinders (1) are provided at the connection between the support plate (4) and the fixed clamping plate (6). A gap is provided between the two shaft cylinders (1). The rotating shaft (8) is rotatably provided in the shaft cylinder (1).

8. The tunnel anchor cable unanchoring device according to claim 7, characterized in that: The force application rod (9) and the movable clamping plate (7) are an integrated structure. The movable clamping plate (7) is provided with a second shaft cylinder, and the second shaft cylinder is located between the two first shaft cylinders. The rotating shaft (8) passes through the first shaft cylinder and the second shaft cylinder, and limit pins are provided at both ends of the rotating shaft (8).

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