Anchor rod clamping and twisting type high-pretightening-force construction device and construction method

Abstract

According to the anchor rod clamping and twisting type high-pretightening-force construction device and method, a locking part and a screwing mechanism are both assembled on a machine base, the locking part is used for clamping an anchor rod in a rock mass, and the screwing mechanism is used for applying torque to a nut on the clamped anchor rod. According to the device, clamping of the anchor rod and tightening of the nut can be achieved at the same time, manual operation steps are reduced, the construction time is shortened, and the working efficiency of anchor rod supporting is improved. A motor drives an inner hexagonal sleeve to apply torque to a nut, a locking part adopts an air cylinder to drive locking blocks to move oppositely to clamp an anchor rod, anti-skid blocks with anti-skid teeth are arranged on the inclined faces of the locking blocks, the anchor rod can be effectively prevented from sliding when pre-tightening force is applied, reliable clamping is guaranteed, the pre-tightening force of the nut is improved, the locking blocks are right-angle blocks, and the inclined faces of the locking blocks are oppositely arranged in parallel, so that the locking effect is good. The stress is uniform, the clamping is stable, and the stability and the reliability of the device in the working process are ensured.

Description

Technical Field

[0001] The present invention relates to a construction device and method for high pre-tightening force of bolt clamping and twisting type. Background Art

[0002] For bolt support, after the nut is initially installed on the bolt, a large axial pre-tightening force is immediately applied to the nut, which is of great significance for the exertion of the bolt support effect. The currently commonly used pre-tightening force application method is to directly tighten the nut through a bolt drilling rig. On the one hand, the torque that can be applied is limited; on the other hand, since the bolt is generally relatively long and the other end is anchored into the rock, when simply tightening the nut without clamping the bolt tail directly, the efficiency of converting the torque applied to the nut into the axial pre-tightening force of the bolt is very low, which becomes an important factor affecting the exertion of the bolt support effect. Summary of the Invention

[0003] The present invention provides a construction device and construction method for high pre-tightening force of bolt clamping and twisting type to solve the above-mentioned problems existing in the prior art.

[0004] The technical solutions adopted by the present invention are as follows:

[0005] A construction device for high pre-tightening force of bolt clamping and twisting type, comprising

[0006] A locking part, which is used to clamp the bolt in the rock mass;

[0007] A screwing mechanism, which is used to apply torque to the nut on the clamped bolt;

[0008] A machine base, on which both the locking part and the screwing mechanism are assembled.

[0009] Further, the locking part includes locking blocks and cylinders. The two cylinders are fixed on the machine base, and the two locking blocks are respectively fixed on the cylinder shafts of the two cylinders. The two cylinders drive the two locking blocks to move towards each other and clamp and hold the bolt.

[0010] Further, the locking blocks are right-angle blocks, and the inclined surfaces of the two locking blocks face each other and are arranged in parallel. The bolt is fixed between the inclined surfaces of the two locking blocks.

[0011] Further, anti-slip blocks with anti-slip teeth are fixed on the inclined surfaces of the locking blocks.

[0012] Further, the screwing mechanism includes an internal hexagon socket and a motor. The motor is fixed on the machine base, and the motor drives the internal hexagon socket to rotate. The nut is matched with the internal hexagon socket.

[0013] Further, a mounting seat is fixed on the machine base, and a mounting sleeve is rotatably connected to the mounting seat. The internal hexagon socket is assembled in the mounting sleeve and rotates together with the mounting sleeve. The motor drives the mounting sleeve to rotate.

[0014] Furthermore, the motor and the mounting sleeve are linked by gears.

[0015] The present invention also discloses a construction method, which includes the following steps:

[0016] S1: Place the anchor bolt between the inclined surfaces of the two locking blocks of the locking part;

[0017] S2: Start the cylinder, and the cylinder drives the locking blocks to move towards each other, so that the anchor bolt is clamped between the inclined surfaces of the locking blocks, preventing the anchor bolt from sliding when applying the pre-tightening force;

[0018] S3: Fit the nut with the internal hexagonal sleeve;

[0019] S4: Start the motor, the motor drives the mounting sleeve to rotate, and then drives the internal hexagonal sleeve to rotate, applying torque to the nut to achieve the application of the pre-tightening force of the anchor bolt.

[0020] The present invention has the following beneficial effects:

[0021] (1) The present invention can simultaneously achieve the clamping of the anchor bolt and the tightening of the nut, reduce the manual operation steps, shorten the construction time, and improve the working efficiency of the anchor bolt support. The motor drives the internal hexagonal sleeve to apply torque to the nut, and the locking part uses the cylinder to drive the locking blocks to move towards each other to clamp the anchor bolt. Moreover, the anti-slip block on the inclined surface of the locking block has anti-slip teeth, which can effectively prevent the anchor bolt from sliding when applying the pre-tightening force, ensuring reliable clamping. The locking blocks are right-angle blocks, with the inclined surfaces facing each other and arranged in parallel, with uniform stress and stable clamping, ensuring the stability and reliability of the device during the working process.

[0022] (2) It can be applicable to various specifications of anchor bolts and nuts. By adjusting the stroke of the cylinder and the torque of the motor, different engineering requirements can be met. The integrated design has simple operation, without complex operation processes, avoiding accidental injuries that may occur when manually directly operating a wrench to tighten the nut, and improving the construction safety. The modular design is convenient for disassembly and maintenance, reducing the equipment maintenance cost and time. The overall structure is compact, with a small volume and light weight, facilitating movement and installation at the construction site. Description of the Drawings

[0023] Figure 1 It is the application structure diagram of the present invention.

[0024] Figure 2 It is the structure diagram of the present invention.

[0025] Figure 3 It is the structure diagram of the locking part.

[0026] Figure 4 It is the structure diagram of the anti-slip block.

[0027] Figure 5 It is the structure diagram of the screwing mechanism.

[0028] Figure 6 This is an exploded view of the tightening mechanism. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] like Figure 1 and Figure 2 The present invention discloses an anchor bolt clamping and twisting type high preload construction device, comprising a locking portion 1, a tightening mechanism 2 and a machine base 3. The locking portion 1 and the tightening mechanism 2 are both fixed on the machine base 3. The locking portion 1 is used to clamp the anchor bolt 100 in the rock mass, and the tightening mechanism 2 is used to apply torque to the nut 110 on the clamped anchor bolt 100.

[0031] like Figure 3 The locking part 1 in the present invention includes a locking block 11 and a cylinder 12. The two cylinders 12 are fixed on the machine base 3. The two locking blocks 11 are respectively fixed on the cylinder shafts of the two cylinders 12. The two cylinders drive the two locking blocks to move toward each other and clamp the anchor rod 100.

[0032] In order to make the movement of the locking block 11 more stable, a sliding block is fixed on the machine base 3, and the locking block 11 is slidably connected to the sliding block.

[0033] The locking block 11 is a right-angle block, one of the right-angle sides of the locking block 11 is slidably connected to the slider, and the other right-angle side is fixed to the cylinder shaft of the cylinder 12. The inclined surfaces of the two locking blocks 11 are arranged in parallel and face each other. When moving toward each other, the two inclined surfaces approach each other and lock the anchor rod 100. To ensure the tightening effect, an anti-sliding block 13 is fixed on the inclined surface of the locking block 11, such as Figure 4 The anti-slip block 13 is provided with anti-slip teeth, and the tooth surface can better lock the anchor rod 100.

[0034] First, the anchor rod 100 is placed between the inclined surfaces of the two locking blocks 11 of the locking part 1. When the anchor rod 100 needs to be clamped, the two cylinders 12 are started at the same time to drive the respective locking blocks 11 to move toward each other. Since the locking blocks 11 are designed as right-angle blocks, and the inclined surfaces of the two locking blocks 11 are arranged facing each other and in parallel, such a structural design enables the locking blocks 11 to stably and firmly clamp the anchor rod 100 when they move toward each other. In addition, an anti-slip block 13 with anti-slip teeth is fixed on the inclined surface of the locking block 11. The setting of the anti-slip block 13 further enhances the friction between the anchor rod 100 and the locking block 11 during the locking process, effectively preventing the anchor rod 100 from sliding when subjected to force, and ensuring the reliability of clamping.

[0035] like Figure 5 and Figure 6, the tightening mechanism 2 includes an internal hexagon socket 21 and a motor 22. The motor 22 is fixed on the machine base 3, and the motor 22 drives the internal hexagon socket 21 to rotate. The nut 110 is engaged with the internal hexagon socket 21.

[0036] The assembly structure between the internal hexagon socket 21 and the motor 22 is as follows: a mounting seat 23 is fixed on the machine base 3, a mounting sleeve 24 is rotatably connected to the mounting seat 23 through a bearing, and the internal hexagon socket 21 is engaged with the mounting sleeve 24 through a key and keyway structure. A driven gear is fixed on the outer wall of the mounting sleeve 24, a driving gear is fixed on the rotating shaft of the motor 22, and the driving gear and the driven gear are engaged with each other to realize the linkage between the motor 22 and the mounting sleeve 24. The power is transmitted between the motor 22 and the mounting sleeve 24 in a gear linkage manner. Such a transmission structure makes the transmission of torque more stable and efficient.

[0037] After the anchor bolt 100 is firmly clamped, next, the tightening mechanism 2 applies torque to the nut 110. When the motor 22 is started, the internal hexagon socket 21 starts to rotate under the drive of the motor 22, and then drives the engaged nut 110 to rotate together, so as to apply torque to the anchor bolt 100 and realize the application of the pre-tightening force.

[0038] Through the coordinated work of the locking part 1 and the tightening mechanism 2, the anchor bolt clamping and torsion type high pre-tightening force construction device of the present invention can quickly, efficiently and stably apply pre-tightening force to the anchor bolt 100 at the construction site, greatly improving the work efficiency and reducing the operation difficulty at the same time, and having good application prospects.

[0039] The construction method of the present invention is as follows:

[0040] Install the anchor bolt 100 into the rock mass according to the design requirements to ensure that the installation position of the anchor bolt 100 is accurate and firm, and the length of the exposed part of the anchor bolt 100 meets the clamping and pre-tightening requirements of this device.

[0041] Preliminarily screw the nut 110 onto the exposed end of the anchor bolt 100 and pre-tighten it to prepare for the subsequent application of the pre-tightening force.

[0042] Carry this anchor bolt pre-tightening force application device to the construction position of the anchor bolt 100, lift the device so that the anchor bolt 100 passes through the device through the internal hexagon socket 21 until the internal hexagon socket is sleeved on the nut 110.

[0043] Start the cylinder 12. Driven by the cylinder 12, the two locking blocks 11 move towards each other, gradually approach and clamp the anchor rod 100. During the clamping process, the inclined surfaces of the locking blocks 11 are in close contact with the anchor rod 100, and the anti-slip teeth on the anti-slip blocks 13 further enhance the frictional force between the anchor rod 100 and the locking blocks 11, ensuring that the anchor rod 100 will not slip during the subsequent application of the pre-tightening force and guaranteeing the accuracy of the applied pre-tightening force.

[0044] Start the motor 22. The motor 22 drives the driving gear to rotate, and then drives the driven gear and the mounting sleeve 24 to rotate. The mounting sleeve 24 drives the hexagon socket 21 to rotate together. The rotation of the hexagon socket 21 causes the nut 110 to rotate accordingly, thereby applying torque to the anchor rod 100 and achieving the application of a high pre-tightening force to the anchor rod 100.

[0045] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. The bolt clamping and twisting type high pre-tightening force construction device is characterized in that: including a locking part (1) for clamping an anchor rod (100) in a rock formation; a screwing mechanism (2) for applying torque to a nut (110) on the clamped anchor rod (100); a machine base (3) on which both the locking part (1) and the screwing mechanism (2) are assembled.

2. The bolt clamping and torsion type high pre-tightening force construction device according to claim 1, characterized in that: The locking part (1) includes locking blocks (11) and cylinders (12). The two cylinders (12) are fixed on the machine base (3), and the two locking blocks (11) are respectively fixed on the cylinder shafts of the two cylinders (12). The two cylinders drive the two locking blocks to move towards each other and clamp and hold the anchor rod (100).

3. The bolt clamping and torsion type high pre-tightening force construction device according to claim 2, characterized in that: The locking blocks (11) are right-angled blocks, and the inclined surfaces of the two locking blocks (11) face each other and are arranged in parallel. The anchor rod (100) is fixed between the inclined surfaces of the two locking blocks.

4. The bolt clamping and torsion type high pre-tightening force construction device according to claim 3, wherein: Anti-slip blocks (13) with anti-slip teeth are fixed on the inclined surfaces of the locking blocks (11).

5. The bolt clamping and twisting type high pre-tightening force construction device according to claim 1, characterized in that: The screwing mechanism (2) includes an internal hexagonal sleeve (21) and a motor (22). The motor (22) is fixed on the machine base (3), and the motor (22) drives the internal hexagonal sleeve (21) to rotate. The nut (110) is matched with the internal hexagonal sleeve (21).

6. The bolt clamping and torsion type high pre-tightening force construction device according to claim 5, characterized in that: An installation seat (23) is fixed on the machine base (3), and an installation sleeve (24) is rotatably connected to the installation seat (23). The internal hexagonal sleeve (21) is assembled in the installation sleeve (24) and rotates together with the installation sleeve. The motor (22) drives the installation sleeve (24) to rotate.

7. The bolt clamping and torsion type high pre-tightening force construction device according to claim 6, wherein: The motor (22) and the installation sleeve (24) are linked by gears.

8. A construction method of the device according to any one of claims 1-7, characterized in that: including the following steps: S1: Place the anchor rod (100) between the inclined surfaces of the two locking blocks (11) of the locking part (1); S2: Start the cylinders (12), and the cylinders drive the locking blocks (11) to move towards each other, so that the anchor rod (100) is clamped between the inclined surfaces of the locking blocks, preventing the anchor rod from sliding when applying a pre-tightening force; S3: Match the nut (110) with the internal hexagonal sleeve (21); S4: Start the motor, and the motor drives the installation sleeve to rotate through gear transmission, and then drives the internal hexagonal sleeve to rotate, applying torque to the nut to apply the pre-tightening force of the anchor rod.

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