NPR constant resistance anchor rod pre-tightening force applying device
By designing an NPR constant resistance anchor bolt preload application device, the preload is automatically applied using force application equipment and connecting components, solving the problems of inconvenient operation and insufficient preload in the existing technology, and realizing simple and efficient preload application and adaptability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HOHAI UNIV
- Filing Date
- 2023-07-13
- Publication Date
- 2026-06-26
AI Technical Summary
Existing technologies cannot effectively apply large preload to NPR constant resistance anchor bolts, and ordinary anchor bolt wrenches are inconvenient to operate and cannot meet the requirements.
Design an NPR constant resistance anchor bolt preload application device, which uses the power shaft of the force application device to connect to the end of the anchor bolt, and realizes automatic application of preload through the connection component and locking component, adapting to different types of anchor bolt nuts, and replacing manual operation.
It enables simple locking operation, can apply greater preload, and is suitable for various models of NPR constant resistance anchor bolts, meeting the requirements of strong preload.
Smart Images
Figure CN116771401B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of anchor bolt technology, and in particular to an NPR constant resistance anchor bolt preload application device. Background Technology
[0002] Rock bolts are a fundamental component of roadway support in modern coal mines, reinforcing the surrounding rock and allowing it to support itself. Rock bolts are used not only in mines but also in engineering projects for the main reinforcement of slopes, tunnels, and dams. As a tension member extending deep into the ground, an anchor bolt connects to the engineering structure at one end and extends into the ground at the other. The entire anchor bolt consists of a free section and an anchored section. The free section is the area that transmits the tension at the bolt head to the anchored body; its function is to apply preload to the anchor bolt. Different anchor bolts can withstand different preloads; for ordinary anchor bolts, a wrench can be used to apply the required preload.
[0003] NPR constant resistance anchor bolts are a new type of anchor bolt that can withstand large preload. Using the preload wrench of ordinary anchor bolts is not only difficult to operate, but also difficult to apply large preload.
[0004] To address this issue, this disclosure proposes an NPR constant resistance anchor bolt preload application device to solve the problem mentioned above where existing preload application devices are unable to apply a large preload to NPR constant resistance anchor bolts. Summary of the Invention
[0005] The purpose of this disclosure is to address the problems existing in the background art by proposing an NPR constant resistance anchor bolt preload application device.
[0006] The technical solution disclosed herein is as follows: An NPR constant resistance anchor bolt preload application device, comprising a main cylinder and a force application device fixed to one end of the main cylinder; including a connecting assembly for connecting to the end of the anchor bolt, one end of the connecting assembly being detachably fixedly connected to the end of the anchor bolt, and the other end of the connecting assembly being fixedly connected to the power shaft of the force application device; including a locking assembly for rotating and locking the anchor bolt nut; the connecting assembly is connected to the end of the anchor bolt, and the power shaft of the force application device pulls the anchor bolt tight, causing the end of the main cylinder to abut against the anchor bolt tray, thereby generating a preload between the anchor bolt tray and the anchor bolt, and locking and fixing the anchor bolt nut by rotating the locking assembly.
[0007] Optionally, the connecting assembly includes a connecting cylinder, one end of which is screwed onto the end of the anchor rod, and the other end of which is rotatably connected to a connecting shaft. The connecting shaft is fixedly connected to the power shaft of the force-applying device via a flange structure. Using the power of the force-applying device instead of manual pulling of the anchor rod is not only simpler but also allows for the application of a stronger preload, better meeting the requirements of NPR constant resistance anchor rods with higher preload bearing capacity.
[0008] Optionally, the connecting assembly includes a toothed ring fixedly sleeved on the outer annular surface of the connecting cylinder, a toothed ring swivel bearing for rotating the toothed ring fixedly connected to the inner annular surface of the main cylinder, and a first rotating gear rotatably connected to the main cylinder wall to mesh with the toothed ring; rotating the first rotating gear drives the toothed ring to rotate, thereby driving the connecting cylinder to rotate. The connecting assembly is used to fix the end of the anchor rod to the power shaft of the force-applying device.
[0009] Optionally, the locking assembly includes a toothed ring swivel bearing fixed to the inner annular surface at the main cylinder port. The inner annular surface of the toothed ring swivel bearing is rotatably connected to the toothed ring sleeve, and the inner ring of the toothed ring sleeve is fitted with a multi-faceted ring for driving the anchor nut to rotate. By rotating the anchor nut through the locking assembly, the anchor nut can be locked and fixed under the current preload, replacing the need for a manual wrench.
[0010] Optionally, the inner ring of the multifaceted ring has a multifaceted groove that matches the outer ring surface of the anchor nut, so that rotating the multifaceted ring will drive the anchor nut to rotate together.
[0011] Optionally, the inner ring of the toothed ring sleeve has a multi-faceted cavity that matches the outer ring surface of the multi-faceted ring, ensuring that the multi-faceted ring can be installed inside the toothed ring sleeve and can rotate together with the toothed ring sleeve.
[0012] Optionally, a magnetic ring is fixedly connected to one inner wall of the multifaceted cavity. The magnetic ring is magnetically attracted to the multifaceted ring, which facilitates the replacement of the corresponding multifaceted ring according to the anchor nut of different sizes.
[0013] Optionally, the locking assembly includes a second rotating gear rotatably connected to the main cylinder, the second rotating gear being engaged with a gear ring sleeve.
[0014] Optionally, the main cylinder has a first rotating cavity for the first rotating gear to extend outward and rotate.
[0015] Optionally, the main cylinder has a second rotating cavity for the second rotating gear to extend outward and rotate.
[0016] Compared with the prior art, this disclosure has the following beneficial technical effects:
[0017] This application utilizes a connecting assembly to fix the end of the anchor rod to the power shaft of the force-applying device. The power of the force-applying device replaces manual pulling of the anchor rod, and the main cylinder is subjected to a reverse force to press against the anchor rod tray, thereby generating a large pre-tightening force between the anchor rod tray and the anchor rod. Finally, by rotating the anchor rod nut through the locking assembly, the anchor rod nut can be locked and fixed under the current pre-tightening force, replacing the manual wrench.
[0018] Furthermore, the multifaceted ring is inserted into the multifaceted cavity and secured by magnetic adsorption via a magnetic ring, allowing for the replacement of multifaceted rings with different multifaceted grooves, thus accommodating anchor nuts of different sizes and models. The threaded inner cavity at the end of the connecting cylinder is stepped, suitable for anchor bolts of different diameters, making the entire device applicable for applying preload to different models of NPR constant resistance anchor bolts.
[0019] In summary, this application not only replaces the pre-tightening wrench that requires manual operation, enabling a simpler locking operation, but also applies a greater pre-tightening force compared to a manual wrench, meeting the requirements of NPR constant resistance anchor bolts with stronger pre-tightening capacity, and is applicable to various types of anchor bolts. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the NPR constant resistance anchor bolt preload application device in the embodiments of this disclosure;
[0021] Figure 2 for Figure 1 A sectional view;
[0022] Figure 3 This is a schematic diagram of the structure of the connecting component in an embodiment of this disclosure;
[0023] Figure 4 This is a schematic diagram of the locking assembly in an embodiment of this disclosure.
[0024] Attached reference numerals: 1. Anchor bolt;
[0025] 2. Anchor bolt tray;
[0026] 31. Main cylinder; 311. First rotating cavity; 312. Second rotating cavity; 32. Connecting assembly; 321. Connecting cylinder; 322. Connecting shaft; 3221. Rotary disk; 3222. Intermediate shaft; 3223. Flange; 323. Gear ring; 324. Gear ring swivel bearing; 325. First rotating gear; 33. Locking assembly; 331. Gear ring sleeve; 3311. Multifaceted cavity; 332. Multifaceted ring; 3321. Multifaceted groove; 333. Gear ring sleeve swivel bearing; 334. Second rotating gear; 335. Magnetic ring; 34. Force application device;
[0027] 4. Anchor bolt nuts. Detailed Implementation
[0028] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments.
[0029] The components of the embodiments of this disclosure, which are typically described and shown in the accompanying drawings, can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of embodiments of this disclosure provided in the drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure.
[0030] Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.
[0031] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0032] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0033] Example 1
[0034] This disclosure discloses an NPR constant resistance anchor preload application device for applying preload to an anchor structure consisting of an anchor bolt 1, an anchor bolt tray 2, and an anchor bolt nut 4.
[0035] like Figure 1-2 As shown, it includes a main cylinder 31, a force-applying device 34 fixed to one end of the main cylinder 31, a connecting assembly 32 for connecting to the end of the anchor rod 1, and a locking assembly 33 for rotating and locking the anchor rod nut 4.
[0036] like Figure 2-3As shown, the various structures and their connections of the connecting assembly 32 are as follows: the outer ring surface of the toothed ring swivel bearing 324 is fixedly connected to the inner wall of the main cylinder 31; the inner ring surface of the toothed ring swivel bearing 324 is rotatably connected to a toothed ring 323; the main cylinder 31 has a first rotating cavity 311 in its wall; the inner wall of the first rotating cavity 311 is rotatably connected to a first rotating gear 325 that can mesh with the toothed ring 323 via a rotating shaft; a connecting cylinder 321 is fixedly sleeved on the inner ring surface of the toothed ring 323; one end of the connecting cylinder 321 has an internal thread cavity that can be helically sleeved with the end of the anchor rod 1; and the other end of all connecting cylinders 321 is rotatably connected to a connecting shaft 322. The connecting shaft 322 consists of a rotating disk 3221, an intermediate shaft 3222, and a flange 3223. The rotating disk 3221 is integrally fixed to one end of the intermediate shaft 3222 and rotatably sleeved with the inner cavity of the connecting cylinder 321. The flange 3223 is integrally fixed to the other end of the intermediate shaft 3222 and is fixedly connected to the flange at the end of the power shaft of the force-applying device 34 by bolts. The force-applying device 34 can be a hydraulic cylinder, a pneumatic cylinder, or other similar equipment.
[0037] like Figure 2 and Figure 4 As shown, the various structures and their connections of the locking assembly 33 are as follows: the outer ring surface of the toothed ring swivel bearing 333 is fixedly connected to the inner wall of the main cylinder 31; the inner ring surface of the toothed ring swivel bearing 333 is rotatably fitted with the toothed ring 331; the main cylinder 31 has a second rotating cavity 312 in its wall; the inner wall of the second rotating cavity 312 is rotatably connected to a second rotating gear 334 that can mesh with the toothed ring 331 via a rotating shaft. The inner ring surface of the toothed ring 331 has a multi-faceted cavity 3311, and a multi-faceted ring 332 is embedded in the multi-faceted cavity 3311. The inner ring of the multi-faceted ring 332 has a multi-faceted groove 3321 that matches the outer ring surface of the anchor nut 4. In this embodiment, the anchor nut 4 has a hexagonal structure, therefore the inner and outer ring surfaces of the multi-faceted ring 332 and the multi-faceted cavity 3311 are also hexagonal structures.
[0038] The working principle of this embodiment is as follows: Anchor rod 1 is connected to the device, allowing its end to extend into the interior of the main cylinder 31 and connect with the port of the connecting cylinder 321 inside the main cylinder 31. The adjusting device is rotated so that the anchor nut 4 can be engaged in the multi-faceted groove 3321. Then, the first rotating gear 325 is rotated. The first rotating gear 325, through its meshing connection with the gear ring 323, drives the gear ring 323 and the connecting cylinder 321 to rotate. The connecting cylinder 321, through a spiral connection with the end of the anchor rod 1, grips the anchor rod 1. Thus, the end of the anchor rod 1 is fixedly connected to the power shaft of the force-applying device 34 via the connecting assembly 32. As the end of the anchor rod 1 is slowly connected and locked to the connecting cylinder 321, the anchor nut 4 will also be fully engaged in the multi-faceted groove 3321, and the end of the main cylinder 31 near the anchor rod tray 2 will also adhere to the anchor rod tray 2. Subsequently, the power axis of the force-applying device 34 retracts inward, thereby pulling the anchor rod 1 towards the force-applying device 34 (since the end of the main cylinder 31 is already attached to the anchor rod tray 2 at this time, the pulling will only produce a slight displacement, so that the end of the main cylinder 31 is tightly against the anchor rod tray 2). The main cylinder 31 is subjected to a reverse force and tightly against the anchor rod tray 2, thereby generating a large preload between the anchor rod tray 2 and the anchor rod 1. Maintaining this strong preload, the second rotating gear 334 is rotated. Through the meshing connection between the second rotating gear 334 and the toothed ring sleeve 331, the toothed ring sleeve 331 is driven to rotate. The toothed ring sleeve 331 drives the multifaceted ring 332 to rotate. The multifaceted ring 332 drives the anchor nut 4 to rotate. The anchor nut 4 moves closer to the anchor tray 2 through the spiral connection between it and the anchor 1, thus tightly pressing against the anchor tray 2 (since the anchor nut 4 is already close to the anchor tray 2 in the initial state, it will only produce a slight displacement and will not come out of the multifaceted groove 3321), so that the anchor tray 2 and the anchor 1 always maintain a strong preload.
[0039] In addition, this disclosure can not only replace the pre-tightening wrench that requires manual operation, thus achieving a simpler locking operation, but also apply a greater pre-tightening force compared to a manual wrench, meeting the requirements of NPR constant resistance anchor rods with stronger pre-tightening capacity.
[0040] Example 2
[0041] This disclosure discloses an NPR constant resistance anchor bolt preload application device for applying preload to an anchor bolt structure consisting of an anchor bolt 1, an anchor bolt tray 2, and an anchor bolt nut 4. It includes a main cylinder 31, a force application device 34 fixed to one end of the main cylinder 31, a connecting assembly 32 for connecting to the end of the anchor bolt 1, and a locking assembly 33 for rotatably locking the anchor bolt nut 4. The structure and connection relationship of the connecting assembly 32 are as follows: the outer ring surface of the toothed ring swivel bearing 324 is fixedly connected to the inner wall of the main cylinder 31; a toothed ring 323 is rotatably connected to the inner ring surface of the toothed ring swivel bearing 324; a first rotating cavity 311 is opened in the wall of the main cylinder 31; and a first rotating gear 325 that can mesh with the toothed ring 323 is rotatably connected to the inner wall of the first rotating cavity 311 via a rotating shaft. A connecting sleeve 321 is fixedly sleeved on the inner ring surface of the toothed ring 323. One end of the connecting sleeve 321 has an internal thread cavity that can be helically sleeved with the end of the anchor rod 1. The other end of the connecting sleeve 321 is rotatably connected to a connecting shaft 322. The connecting shaft 322 consists of a rotating disk 3221, an intermediate shaft 3222, and a flange 3223. The rotating disk 3221 is integrally fixed to one end of the intermediate shaft 3222 and rotatably sleeved with the inner cavity of the connecting sleeve 321. The flange 3223 is integrally fixed to the other end of the intermediate shaft 3222 and is fixedly connected to the flange at the end of the power shaft of the force-applying device 34 by bolts. The force-applying device 34 can be a hydraulic cylinder, a pneumatic cylinder, or other equipment. The structure and connection relationship of the locking assembly 33 are as follows: the outer ring surface of the toothed ring swivel bearing 333 is fixedly connected to the inner wall of the main cylinder 31. The inner ring surface of the toothed ring swivel bearing 333 is rotatably sleeved with the toothed ring 331. The main cylinder 31 has a second rotating cavity 312. The inner wall of the second rotating cavity 312 is rotatably connected to a second rotating gear 334 that can mesh with the toothed ring 331 via a rotating shaft. The inner ring surface of the toothed ring 331 has a multi-faceted cavity 3311, and a multi-faceted ring 332 is embedded in the multi-faceted cavity 3311. The inner ring of the multi-faceted ring 332 has a multi-faceted groove 3321 that matches the outer ring surface of the anchor nut 4. In this embodiment, the anchor nut 4 has a hexagonal structure, so the inner and outer ring surfaces of the multi-faceted ring 332 and the multi-faceted cavity 3311 are also hexagonal structures.
[0042] Compared to Embodiment 1, this embodiment also includes:
[0043] like Figure 2 As shown, a magnetic ring 335, which can be magnetically attracted to the multifaceted ring 332, is fixedly connected to one side of the inner wall of the multifaceted cavity 3311. The multifaceted ring 332 is inserted into the multifaceted cavity 3311 and fixed by magnetic attraction through the magnetic ring 335. Therefore, multifaceted rings 332 with different multifaceted grooves 3321 can be replaced, which can accommodate anchor nuts 4 of different sizes and models. Furthermore, the threaded inner cavity at the end of the connecting cylinder 321 is stepped, which can be used for anchor bolts of different diameters. Thus, the entire device can be used to apply preload to different models of NPR constant resistance anchor bolts.
[0044] The above specific embodiments are merely several optional embodiments of this disclosure. Based on the technical solutions of this disclosure and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.
Claims
1. A preload application device for NPR constant resistance anchor bolts, characterized in that: Includes a main cylinder (31) and a force-applying device (34) fixed to one end of the main cylinder (31); Includes a connecting assembly (32) for connecting to the end of the anchor rod (1), one end of the connecting assembly (32) being detachably fixed to the end of the anchor rod (1), and the other end of the connecting assembly (32) being fixedly connected to the power shaft of the force application device (34); The locking assembly (33) includes a rotating locking anchor nut (4); The connecting component (32) is connected to the end of the anchor rod (1), and the power shaft of the force application device (34) pulls the anchor rod (1) tight, so that the end of the main cylinder (31) abuts against the anchor rod tray (2), thereby generating a pre-tightening force between the anchor rod tray (2) and the anchor rod (1), and locking and fixing by rotating the anchor nut (4) through the locking component (33); The connecting assembly (32) includes a connecting cylinder (321), one end of which is spirally connected to the end of the anchor rod (1), and the other end of which is rotatably connected to a connecting shaft (322), and the connecting shaft (322) is fixedly connected to the power shaft of the force application device (34) through a flange structure; The connecting assembly (32) includes a toothed ring (323) fixedly sleeved on the outer ring surface of the connecting cylinder (321), and a toothed ring rotating bearing (324) for the toothed ring (323) to rotate is fixedly connected to the inner ring surface of the main cylinder (31). The cylinder wall of the main cylinder (31) is rotatably connected to a first rotating gear (325) that can mesh with the toothed ring (323); rotating the first rotating gear (325) drives the toothed ring (323) to rotate, thereby driving the connecting cylinder (321) to rotate. The locking assembly (33) includes a toothed ring swivel bearing (333) fixed to the inner ring surface at the port of the main cylinder (31). The inner ring surface of the toothed ring swivel bearing (333) is rotatably connected to the toothed ring sleeve (331). The inner ring of the toothed ring sleeve (331) is equipped with a multi-faceted ring (332) for driving the anchor nut (4) to rotate.
2. The NPR constant resistance anchor bolt preload application device according to claim 1, characterized in that, The inner ring of the multifaceted ring (332) has a multifaceted groove (3321) that matches the outer ring surface of the anchor nut (4).
3. The NPR constant resistance anchor bolt preload application device according to claim 1, characterized in that, The inner ring of the toothed ring sleeve (331) has a multi-faceted cavity (3311) that matches the outer ring surface of the multi-faceted ring (332).
4. The NPR constant resistance anchor bolt preload application device according to claim 3, characterized in that, A magnet ring (335) is fixedly connected to the inner wall of one side of the multifaceted cavity (3311). The magnet ring (335) is magnetically attracted to the multifaceted ring (332), which makes it easy to replace the corresponding multifaceted ring (332) according to the anchor nut (4) of different sizes.
5. The NPR constant resistance anchor bolt preload application device according to claim 1, characterized in that, The locking assembly (33) includes a second rotating gear (334) rotatably connected to the main cylinder (31), and the second rotating gear (334) meshes with the toothed ring sleeve (331).
6. The NPR constant resistance anchor bolt preload application device according to claim 5, characterized in that, The main cylinder (31) has a first rotating cavity (311) for the first rotating gear (325) to extend outward and rotate, and the main cylinder (31) has a second rotating cavity (312) for the second rotating gear (334) to extend outward and rotate.