Anchoring rod tensioning device and method of use thereof

Abstract

The application provides an anchor rod tensioning device convenient for anchor rod tensioning locking and a use method thereof, and relates to the technical field of anchor rod tensioning. The anchor rod tensioning device comprises a tensioning cylinder, an anchor rod locking block and a locking ring. The tensioning cylinder comprises a cylinder barrel and a piston rod arranged in the cylinder barrel and in sliding fit with the cylinder barrel. The anchor rod locking block is arranged in front of the piston rod, and an anchor rod fixing hole opposite to the through hole is arranged on the anchor rod locking block. The locking ring is sleeved on the anchor rod locking block along the axial direction of the cylinder barrel and is connected with the cylinder barrel. The locking ring is in sliding fit with the anchor rod locking block. The anchor rod tensioning device further comprises a locking pin arranged in the anchor rod locking block and used for jacking the anchor rod in the anchor rod fixing hole. The locking pin is arranged in the anchor rod locking block in the radial direction of the anchor rod fixing hole. The application can improve the construction efficiency of the anchor rod.

Description

Technical Field

[0001] This invention relates to the field of anchor bolt tensioning technology, specifically to an anchor bolt tensioning device and its usage method. Background Technology

[0002] Anchor cables or anchor rods are the most basic components of tunnel and high slope support. Tensioning equipment is a specialized device used to tension prestressed anchor rods and establish prestress. It mainly consists of jacks and high-pressure oil pumps, and sometimes also includes pressure sensors to measure tension and dial gauges to measure anchor head displacement. During tensioning, instruments are needed to measure the tension acting on the prestressed tendons of the anchor rods.

[0003] Currently, before tensioning prestressed anchor bolts, it is necessary to manually put the tensioning equipment onto the prestressed anchor bolt, then put the anchor separately onto the prestressed anchor bolt, and finally add multiple cone-shaped clamps into the gap between the anchor and the anchor bolt to lock the anchor bolt. The anchor bolt installation and locking method is cumbersome and affects the efficiency of anchor bolt construction. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an anchor tensioning device and its method of use that facilitates anchor tensioning and locking.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an anchor bolt tensioning device, including a tensioning cylinder, an anchor bolt locking block and a locking ring;

[0006] The tensioning cylinder includes a cylinder barrel and a piston rod that is disposed inside the cylinder barrel and slides in cooperation with the cylinder barrel. The piston rod has a through hole extending along the axial direction of the piston rod for inserting the anchor rod.

[0007] The anchor locking block is located in front of the piston rod and can be pushed by the piston rod to move away from the cylinder. The anchor locking block is provided with an anchor fixing hole opposite to the through hole.

[0008] The locking ring is sleeved on the anchor locking block along the axial direction of the cylinder and connected to the cylinder. The locking ring and the anchor locking block are in sliding engagement.

[0009] It also includes a locking pin disposed within the anchor bolt locking block for pressing the anchor bolt in the anchor bolt fixing hole. The locking pin is slidably disposed within the anchor bolt locking block along the radial direction of the anchor bolt fixing hole. One end of the locking pin is provided to cooperate with the locking ring when the anchor bolt locking block moves away from the locking ring relative to the locking ring, thereby pushing the locking pin to slide inward along the radial direction of the anchor bolt fixing hole, thereby locking the locking surface of the anchor bolt in the anchor bolt fixing hole.

[0010] Furthermore, a return spring is provided between the locking pin and the anchor bolt locking block, with one end connected to the anchor bolt locking block and the other end connected to the locking pin, so that the locking pin can slide outward along the radial direction of the anchor bolt fixing hole.

[0011] Furthermore, the locking ring is slidably connected to the cylinder along the axial direction of the cylinder via a guide post. A locking elastic element is provided between the locking ring and the cylinder, with one end connected to the locking ring and the other end connected to the cylinder, so that the locking ring slides closer to the cylinder.

[0012] Furthermore, the elastic element is a spring.

[0013] Furthermore, the locking ring is provided with a locking mechanism to fix the anchor bolt locking block in the anchor bolt locking position.

[0014] Furthermore, the locking mechanism includes a pin that is slidably disposed on the locking ring in the radial direction of the locking ring to fix the anchor bolt locking block, and a lever that is hinged on the cylinder to control the pin to slide inward in the radial direction of the locking ring to fix the anchor bolt locking block in the anchor bolt locking position.

[0015] The anchor bolt locking block is provided with a pin hole that engages with the inner end of the pin.

[0016] The lever is arranged along the axis of the cylinder. One end of the lever is connected to the outer end of the pin, and the inner side of the other end is provided with a top block. The top block is fixed to the locking ring. The top block is provided with a locking control surface that cooperates with the inner side of the other end of the lever to allow the lever to rotate around the hinge point where it is hinged to the cylinder, thereby controlling the pin to slide inward along the radial direction of the locking ring, and thus fixing the anchor bolt locking block in the anchor bolt locking position. As the locking control surface slides away from the cylinder with the locking ring, it cooperates with the inner side of the other end of the lever to allow the lever to rotate around the hinge point where it is hinged to the cylinder, thereby controlling the pin to slide inward along the radial direction of the locking ring, and thus fixing the anchor bolt locking block in the anchor bolt locking position.

[0017] Furthermore, a return spring is provided between the lever and the cylinder to reset the lever.

[0018] The above-mentioned method of using the anchor bolt tensioning equipment includes:

[0019] The tensioning end of the anchor rod passes through the through hole of the piston rod and then into the anchor rod fixing hole of the anchor rod locking block;

[0020] Hydraulic oil is introduced into the cylinder of the tensioning cylinder to extend the piston rod. During the extension of the piston rod, the piston rod pushes the anchor locking block to move away from the cylinder. During the movement of the anchor locking block, the locking pin moves together, so that the locking surface of the locking pin engages with the locking ring. Thus, the locking pin slides inward along the radial direction of the anchor fixing hole through the locking surface, and then extends into the anchor fixing hole to press and lock the anchor rod in the anchor fixing hole.

[0021] Continue to use the piston rod to push the anchor bolt locking block away from the cylinder until the anchor bolt tension reaches the required level.

[0022] The beneficial effects of the present invention are: the anchor bolt tensioning device and its method of use of the present invention only require the anchor bolt to be inserted into the tensioning device during anchor bolt tensioning, without the need to install clamps. The anchor bolt can be automatically locked in the through hole of the anchor bolt locking block by the locking pin, making the anchor bolt locking convenient and quick, and improving the construction efficiency of anchor bolts. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0024] Figure 2 This is a three-dimensional schematic diagram of the present invention;

[0025] Figure 3 yes Figure 1 Enlarged view of point A;

[0026] Figure 4 yes Figure 2 Enlarged view of point B;

[0027] Figure 5 This is a three-dimensional schematic diagram of the present invention;

[0028] Figure 6 yes Figure 5 Enlarged view of point C;

[0029] Figure 7 This is a schematic diagram showing the connection between the lever and the pin.

[0030] The figure shows: tensioning cylinder 1, anchor locking block 2, locking ring 3, locking pin 4, return spring 5, guide post 6, elastic element 7, cylinder 11, piston rod 12, through hole 13, anchor fixing hole 21, locking surface 41, pin 81, lever 82, top block 83, return spring 84, and locking control surface 831. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] like Figures 1 to 3As shown, the anchor bolt tensioning device of the present invention includes a tensioning cylinder 1, an anchor bolt locking block 2, and a locking ring 3. The tensioning cylinder 1 includes a cylinder barrel 11 and a piston rod 12 that is slidably fitted within the cylinder barrel 11. The piston rod 12 has a through hole 13 extending along its axial direction for inserting an anchor bolt. The anchor bolt locking block 2 is located in front of the piston rod 12 and can be pushed by the piston rod 12 to move away from the cylinder barrel 11. The anchor bolt locking block 2 has an anchor bolt fixing hole 21 opposite to the through hole 13. There can be one or more anchor bolt fixing holes 21, depending on the specific needs. The locking ring 3 is sleeved on the anchor bolt locking block 2 along the axial direction of the cylinder 11 and connected to the cylinder 11. The locking ring 3 and the anchor bolt locking block 2 are slidably engaged. The device is also provided with a locking pin 4 disposed in the anchor bolt locking block 2 for pressing the anchor bolt in the anchor bolt fixing hole 21. The locking pin 4 is slidably disposed in the anchor bolt locking block 2 along the radial direction of the anchor bolt fixing hole 21. One end of the locking pin 4 is provided with a locking surface 41 that can engage with the locking ring 3 when the anchor bolt locking block 2 moves away from the cylinder 11 relative to the locking ring 3, thereby pushing the locking pin 4 to slide inward along the radial direction of the anchor bolt fixing hole 21 and then extending into the anchor bolt fixing hole 21 to press and lock the anchor bolt in the anchor bolt fixing hole 21.

[0033] The locking surface 41 can be an inclined surface, a straight surface, or a spherical surface, etc., and is specifically set according to the shape of the mating part where the locking ring 3 and the locking surface 41 cooperate. Figure 3 In the middle, the locking surface 41 is an inclined surface. The locking ring 3, by cooperating with the inclined surface, generates a component force that causes the locking pin 4 to slide inward along the radial direction of the anchor bolt fixing hole 21, thereby pushing the locking pin 4 to press and lock the anchor bolt, preventing the anchor bolt from sliding relative to the anchor bolt locking block 2.

[0034] The specific usage process of the anchor bolt tensioning device of the present invention is as follows: the tensioning end of the anchor bolt passes through the through hole 13 of the piston rod 12 and then through the anchor bolt fixing hole 21 of the anchor bolt locking block 2; hydraulic oil is introduced into the cylinder 11 of the tensioning cylinder 1 to extend the piston rod 12. During the extension of the piston rod 12, it pushes the anchor bolt locking block 2 to move away from the cylinder 11. During the movement of the anchor bolt locking block 2, it drives the locking pin 4 to move together, so that the locking surface 41 of the locking pin 4 cooperates with the locking ring 3, thereby providing a component force to the locking pin 4 in the radial direction of the anchor bolt fixing hole 21 through the locking surface 41, causing the locking pin 4 to slide in the radial direction of the anchor bolt fixing hole 21, and then extend into the anchor bolt fixing hole 21 to press and lock the anchor bolt in the anchor bolt fixing hole 21. In this way, as the piston rod 12 continues to extend, the anchor bolt can be pulled through the anchor bolt locking block 2, providing a prestress to the anchor bolt.

[0035] The anchor bolt tensioning device of the present invention only requires the anchor bolt to be inserted into the tensioning device during anchor bolt tensioning, without the need to install clamps. The anchor bolt can be automatically locked in the through hole of the anchor bolt locking block 2 by the locking pin 4. The anchor bolt locking is convenient and quick, which can improve the efficiency of anchor bolt construction.

[0036] Understandably, in order to better tighten and lock the anchor bolt, the end face of the locking pin 4 that mates with the anchor bolt can be set to be arc-shaped.

[0037] In an embodiment of the present invention, a return spring 5 is provided between the locking pin 4 and the anchor bolt locking block 2, with one end connected to the anchor bolt locking block 2 and the other end connected to the locking pin 4, so that the locking pin 4 can slide outward in the radial direction of the anchor bolt fixing hole 21. Thus, when the piston rod 12 retracts, the return spring 5 allows the locking pin 4 to slide outward in the radial direction of the anchor bolt fixing hole 21 and automatically reset, facilitating the next tensioning of the anchor bolt.

[0038] The locking ring 3 can be installed on the cylinder 11 by means of fixed connection, such as welding or bolt connection. It is understood that when the locking ring 3 is installed on the cylinder 11 by means of fixed connection, after the locking ring 3 presses the locking pin 4 against the anchor rod fixing hole 21 through the locking surface 41, the locking surface 41 needs to be set to cooperate with the locking ring 3 and be able to slide along the axial direction of the locking ring 3, so as to facilitate the continued movement of the anchor rod locking block 2 to tension the anchor rod.

[0039] like Figure 4 As shown in the embodiment of the invention, the locking ring 3 is slidably connected to the cylinder 11 along the axial direction of the cylinder 11 via the guide post 6. A locking elastic element 7 is provided between the locking ring 3 and the cylinder 11, with one end connected to the locking ring 3 and the other end connected to the cylinder 11, allowing the locking ring 3 to slide towards the cylinder 11. During the insertion of the anchor rod into the anchor rod locking block 2, friction with the anchor rod locking block 2 will push the anchor rod locking block 2 and the locking ring 3 away from the cylinder, thereby compressing or stretching the elastic element. Thus, after the anchor rod enters the anchor rod locking block 2, the elastic element 7 provides a reaction force to the locking ring 3, causing it to slide towards the cylinder 11. This allows the locking ring 3 to slide relative to the anchor rod locking block 2 towards the cylinder 11, thereby tightly engaging with the locking surface 41 to initially lock the anchor rod with the locking pin 4, facilitating the tensioning of the anchor rod. In addition, after the locking pin 4 locks the anchor rod, the locking ring 3 can be pushed by the locking surface 41 to move together with the anchor rod locking block 2 to continue to tension the anchor rod, thus reducing the wear on the locking ring 3 and the locking pin 4.

[0040] The elastic element 7 can be made of rubber, spring or tension spring, etc. In this invention, the elastic element 7 is made of spring.

[0041] In this invention, the locking ring 3 is provided with a locking mechanism to fix the anchor locking block 2 in the anchor locking position. With the locking mechanism provided, it can share part of the reaction force of the tensioned anchor rod with the locking pin 4, reducing the stress on the locking pin 4 and helping to ensure the service life of the locking pin 4.

[0042] The locking mechanism can lock screws or pins. In embodiments of the invention, such as... Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the locking mechanism includes a pin 81 that slides within the locking ring 3 along the radial direction to fix the anchor bolt locking block 2, and a lever 82 hinged to the cylinder 11 to control the pin 81 to slide inward along the radial direction of the locking ring 3 to fix the anchor bolt locking block 2 in the anchor bolt locking position. The anchor bolt locking block 2 has a pin hole that engages with the inner end of the pin 81. The lever 82 is arranged along the axial direction of the cylinder 11. One end of the lever 82 is connected to the outer end of the pin 81, and the inner side of the other end has a top block 83. The top block 83 is fixed to the locking ring 3. The top block 83 has a locking control surface 831 that engages with the inner side of the other end of the lever 82 to allow the lever 82 to rotate around the hinge point where it is hinged to the cylinder. This allows the lever 82 to control the pin 81 to slide inward along the radial direction of the locking ring 3, thereby fixing the anchor bolt locking block 2 in the anchor bolt locking position. As the locking ring 3 slides away from the cylinder 11, the locking control surface 831 engages with the inner side of the other end of the lever 82, causing the lever 82 to rotate around its hinge point with the cylinder. This allows the lever 82 to control the pin 81 to slide inward along the radial direction of the locking ring 3, inserting the inner end of the pin into the pin hole on the anchor bolt locking block 2. This, in turn, fixes the anchor bolt locking block 2 within the locking ring 3 and places it in the anchor bolt locked position. The locking control surface 831 can be an inclined surface, a straight surface, etc., specifically designed according to the shape of the inner side of the other end of the lever 82.

[0043] The aforementioned locking mechanism can automatically fix the anchor bolt locking block 2 onto the locking ring 3 during the process of using the piston rod 12 to push the anchor bolt locking block 2 and the locking ring 3 to move, making it more convenient to use.

[0044] In this embodiment of the invention, one end of the guide post 6 is fixed on the locking ring 3, the guide post 6 is slidably connected to the cylinder 11, and the top block 83 is fixed on the guide post 6, thereby fixing the locking ring 3 through the guide post.

[0045] As shown in the figure, a return spring 84 is provided between the lever 82 and the cylinder 11 to reset the lever 82. When the locking control surface 831 disengages from the lever 82, the return spring 84 can deflect the lever 82 outward, thereby causing the lever 82 to control the pin 81 to slide outward along the radial direction of the locking ring 3, so that the pin 81 disengages from the anchor bolt locking block 2 and returns to its original position, making it easier to remove the equipment from the anchor bolt.

[0046] The specific steps for using the above-mentioned anchor tensioning equipment are as follows:

[0047] Step 1: Pass the tensioning end of the anchor rod through the through hole 13 of the piston rod 12 and then through the anchor rod fixing hole 21 of the anchor rod locking block 2;

[0048] Step 2: Hydraulic oil is introduced into the cylinder 11 of the tensioning cylinder 1 to extend the piston rod 12. During the extension of the piston rod 12, the anchor locking block 2 is pushed to move away from the cylinder 11. During the movement of the anchor locking block 2, the locking pin 4 is moved together, so that the locking surface 41 of the locking pin 4 cooperates with the locking ring 3. Thus, the locking pin 4 slides inward along the radial direction of the anchor fixing hole 21 through the locking surface 41, and then extends into the anchor fixing hole 21 to press and lock the anchor in the anchor fixing hole 21.

[0049] Step 3: Continue to use piston rod 12 to push anchor bolt locking block 2 away from cylinder 11 until the tension of anchor bolt reaches the required level.

Claims

1. Anchor bolt tensioning equipment, characterized in that, It includes a tensioning cylinder (1), an anchor bolt locking block (2), and a locking ring (3); The tensioning cylinder (1) includes a cylinder (11) and a piston rod (12) which is disposed inside the cylinder (11) and slides with the cylinder (11). The piston rod (12) has a through hole (13) extending along the axial direction of the piston rod (12) for inserting the anchor rod. The anchor bolt locking block (2) is located in front of the piston rod (12) and can be pushed by the piston rod (12) to move away from the cylinder (11). The anchor bolt locking block (2) is provided with an anchor bolt fixing hole (21) opposite to the through hole (13). The locking ring (3) is sleeved on the anchor locking block (2) along the axial direction of the cylinder (11) and connected to the cylinder (11). The locking ring (3) and the anchor locking block (2) are in sliding fit. It also includes a locking pin (4) disposed in the anchor bolt locking block (2) for pressing the anchor bolt in the anchor bolt fixing hole (21). The locking pin (4) is slidably disposed in the anchor bolt locking block (2) along the radial direction of the anchor bolt fixing hole (21). One end of the locking pin (4) is provided to cooperate with the locking ring (3) when the anchor bolt locking block (2) moves away from the cylinder (11) relative to the locking ring (3), thereby pushing the locking pin (4) to slide inward along the radial direction of the anchor bolt fixing hole (21), thereby locking the locking surface (41) of the anchor bolt in the anchor bolt fixing hole (21).

2. The anchor bolt tensioning device as described in claim 1, characterized in that, A return spring (5) is provided between the locking pin (4) and the anchor bolt locking block (2), with one end connected to the anchor bolt locking block (2) and the other end connected to the locking pin (4), so that the locking pin (4) slides outward in the radial direction of the anchor bolt fixing hole (21).

3. The anchor bolt tensioning device as described in claim 1, characterized in that, The locking ring (3) is slidably connected to the cylinder (11) along the axial direction of the cylinder (11) via the guide post (6). A locking elastic element (7) is provided between the locking ring (3) and the cylinder (11), with one end connected to the locking ring (3) and the other end connected to the cylinder (11), so that the locking ring (3) slides closer to the cylinder (11).

4. The anchor bolt tensioning device as described in claim 3, characterized in that, The elastic element (7) is a spring.

5. The anchor bolt tensioning device as described in claim 2, characterized in that, The locking ring (3) is provided with a locking mechanism to fix the anchor locking block (2) in the anchor locking position.

6. The anchor bolt tensioning device as described in claim 5, characterized in that, The locking mechanism includes a pin (81) that is slidably disposed on the locking ring (3) in the radial direction of the locking ring (3) to fix the anchor locking block (2) and a lever (82) that is hinged on the cylinder (11) to control the pin (81) to slide inward in the radial direction of the locking ring (3) to fix the anchor locking block (2) in the anchor locking position. The anchor locking block (2) is provided with a pin hole that engages with the inner end of the pin (81); The lever (82) is arranged along the axial direction of the cylinder (11). One end of the lever (82) is connected to the outer end of the pin (81), and the inner side of the other end is provided with a top block (83). The top block (83) is fixedly connected to the locking ring (3). The top block (83) is provided with a surface that cooperates with the inner side of the other end of the lever (82) so that the lever (82) rotates about the hinge point where it is hinged to the cylinder (11), thereby controlling the pin (81) to slide inward along the radial direction of the locking ring (3). The movement then fixes the anchor bolt locking block (2) to the locking control surface (831) at the anchor bolt locking position; the locking control surface (831) slides away from the cylinder (11) as the locking ring (3) slides, and cooperates with the inner side of the other end of the lever (82) to make the lever (82) rotate around the hinge point where it is hinged to the cylinder (11), thereby controlling the pin (81) to slide inward along the radial direction of the locking ring (3), thereby fixing the anchor bolt locking block (2) at the anchor bolt locking position.

7. The anchor bolt tensioning device as described in claim 6, characterized in that, A return spring (84) is provided between the lever (82) and the cylinder (11) to reset the lever (82).

8. The method of using the anchor bolt tensioning device as described in any one of claims 1 to 7, characterized in that, include: The tensioning end of the anchor rod passes through the through hole (13) of the piston rod (12) and then through the anchor rod fixing hole (21) of the anchor rod locking block (2); Hydraulic oil is introduced into the cylinder (11) of the tensioning cylinder (1) to extend the piston rod (12). During the extension of the piston rod (12), the anchor locking block (2) is pushed to move away from the cylinder (11). During the movement of the anchor locking block (2), the locking pin (4) is moved together, so that the locking surface (41) of the locking pin (4) cooperates with the locking ring (3). Thus, the locking pin (4) slides inward along the radial direction of the anchor fixing hole (21) through the locking surface (41), and then extends into the anchor fixing hole (21) to press and lock the anchor in the anchor fixing hole (21). Continue to use the piston rod (12) to push the anchor bolt locking block (2) away from the cylinder (11) until the tension of the anchor bolt reaches the required level.

Images