Anchor rod drawing instrument

Abstract

The utility model discloses an anchor rod drawing instrument, which belongs to the technical field of engineering equipment, and comprises an inverted U-shaped assembly plate, an anchor rod and an anchor rod, the assembling pipe is installed at the top end of the assembling plate in an embedded mode, and a hydraulic rod for providing anchor rod drawing power is installed on the inner wall of the assembling pipe; the inverted-U-shaped connecting plate is arranged below the hydraulic rod, the top end of the connecting plate is connected with a hollow pipe, a movable rod is arranged in an inner cavity of the hollow pipe and fixedly connected with a moving part of the hydraulic rod, the bottom end of the movable rod is connected with a pressure sensor, and a vertical spring is connected between the pressure sensor and the connecting plate. An observation window for observing the pressure sensor is embedded in the periphery of the hollow pipe; and the anchor ring is fixedly connected with the connecting plate, and a funnel-shaped movable channel is formed in the anchor ring. The anchor rod drawing instrument has a certain amount of movement, so that the continuous change of the pulling force can be conveniently and visually known from the outside, the contraction of the hydraulic rod can be ensured, and the effect of protecting the hydraulic rod is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of engineering equipment technology, and in particular to an anchor bolt pull-out device. Background Technology

[0002] In tunnel engineering, anchor bolt pull-out force tests are required before anchor bolt support. Anchor bolt pull-out testers are crucial tools for detecting anchor bolt pull-out force during anchor bolt support. In some tunnel projects, water-expanding anchor bolts are used. Water pressure inflates the anchor bolts, pressing them firmly against the rock surface. Once the water pressure reaches a preset level, a pull-out test can be performed, shortening construction and testing time. However, directly using hydraulic rods for pull-out testing not only fails to provide a direct view of the pull-out data but also lacks displacement adjustment testing, making the hydraulic rods prone to damage.

[0003] A search revealed a Chinese patent document (application publication number CN115597974A) describing an anchor bolt pull-out device. The device includes a reaction frame, a jack, a conversion component, and an anchor ring. The reaction frame is supported on the ground, the jack is located on top of the reaction frame and cooperates with a drive component, the conversion component is connected to the jack via a transmission component, and the anchor ring is fixedly connected to the conversion component. The anchor bolt pull-out device can apply a pull-out force to the anchor bolt, facilitating the detection of the pull-out force of the anchor bolt under test. The anchor ring can provide a large force to ensure the anchor bolt is pulled out, thus giving the device good structural strength and reliability. Furthermore, by incorporating the transmission component and conversion component, adjustments can be made according to anchor bolts of different lengths exposed on the ground, thereby improving the applicability of the anchor bolt pull-out device. However, this patent directly uses a hydraulic rod for pull-out testing, which not only fails to provide a direct view of the pull-out data but also lacks displacement adjustment testing, making the hydraulic rod prone to damage. Utility Model Content

[0004] The purpose of this invention is to provide an anchor bolt pull-out device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anchor bolt pull-out device, comprising:

[0006] The assembly panel is in the shape of an inverted U.

[0007] An assembly tube is embedded in the top of the assembly plate, and a hydraulic rod that provides the pulling power for the anchor bolt is installed on the inner wall of the assembly tube.

[0008] An inverted U-shaped connecting plate is set below the hydraulic rod. A hollow tube is connected to the top of the connecting plate. A movable rod is set inside the hollow tube. The movable rod is connected and fixed to the moving part of the hydraulic rod. A pressure sensor is connected to the bottom of the movable rod. A vertical spring is connected between the pressure sensor and the connecting plate. An observation window for the pressure sensor to observe is installed inside the outer periphery of the hollow tube.

[0009] The anchor ring is connected and fixed to the connecting plate. The inside of the anchor ring has a funnel-shaped movable channel, and multiple trapezoidal clamps for fixing the anchor rod are set in the movable channel.

[0010] As a preferred embodiment, the inner wall of the active channel and the outer periphery of the clamp are both provided with anti-slip texture, and the top of the anchor ring is connected to a connecting rod.

[0011] In a preferred embodiment, the connecting rod is rotatably connected to a pressure plate via a bearing, and the bottom end of the pressure plate is connected to a clamping spring for pressing against the clamping piece.

[0012] As a preferred embodiment, the top of the assembly plate is detachably connected to a plurality of storage boxes for storing miscellaneous items, and the top of the storage boxes is rotatably connected to a lid.

[0013] As a preferred embodiment, hollow plates are fixedly connected to both sides of the assembly plate, and a counterweight plate is provided on the outer periphery of the assembly plate to be combined with the hollow plates.

[0014] As a preferred embodiment, the outer periphery of the assembly plate is connected to a C-shaped limiting plate for limiting the counterweight plate, and a limiting threaded tube is embedded in the top of the hollow plate.

[0015] As a preferred embodiment, the limiting threaded pipe thread connection has a clamping threaded rod for clamping and fixing.

[0016] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0017] During testing, the hydraulic rod of this anchor bolt pull-out tester retracts, indirectly causing the connecting plate and anchor ring to move upward, thus enabling a pull-out test on the anchor bolt fixed by the clamp. During the retraction of the hydraulic rod, the vertical spring extends, allowing the moving part of the hydraulic rod to move and protecting the hydraulic rod. At this time, the restoring force of the vertical spring is fed back to the pressure sensor, allowing for a direct and intuitive understanding of the continuous change in tension from the outside.

[0018] When using this anchor bolt puller, counterweights can be placed in the storage box and hollow plate to improve overall stability. If the counterweight is insufficient, the counterweight plate can be removed, placed inside the hollow plate, and additional items can be placed on the counterweight plate to increase the counterweight weight.

[0019] When the anchor ring is pulled upwards in this anchor bolt puller, the clamping plate will be pressed against it to fix the anchor bolt and ensure the stability of the anchor bolt fixation. The clamping spring can press down against the clamping plate to prevent the clamping plate from moving upwards and falling off at will.

[0020] This anchor bolt pull-out device has a certain range of movement, which not only allows for easy and intuitive understanding of the continuous changes in tension from the outside, but also ensures the retraction of the hydraulic rod, thus protecting the hydraulic rod. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the counterweight plate after adjustment in this utility model;

[0024] Figure 3 This is a schematic diagram of the main view structure of the assembly plate of this utility model;

[0025] Figure 4 This is a front view of the anchor ring and hollow tube of this utility model;

[0026] Figure 5 This is a cross-sectional view of the anchor ring and clamping plate of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] In the picture:

[0029] 1. Assembly plate; 2. Assembly tube; 3. Hydraulic rod; 4. Connecting plate; 5. Hollow tube; 6. Movable rod; 7. Pressure sensor; 8. Vertical spring; 9. Anchor ring; 10. Clamping plate; 11. Connecting rod; 12. Pressure plate; 13. Clamping spring; 14. Storage box; 15. Box lid; 16. Hollow plate; 17. Counterweight plate; 18. Limiting plate; 19. Limiting threaded tube; 20. Clamping threaded rod. Detailed Implementation

[0030] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0031] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0032] The connection method can adopt existing methods such as bonding, welding, and bolting, depending on the actual needs. Techniques, methods and equipment known to those skilled in the art may not be discussed in detail. However, where appropriate, the techniques, methods and equipment should be regarded as part of the specification. The proportions of the components in the drawings are for reference only and can be adjusted to a certain extent according to the actual use.

[0033] This application addresses the pull-out of anchor bolts. Since the pulling force is relatively large, the equipment and structure used must be compatible with the required pulling force for the test. The stability of the connection between the equipment and structure must also be compatible with the required pulling force to meet the test requirements.

[0034] Please see Figures 1 to 5 As shown, an anchor bolt pull-out device, in this embodiment including:

[0035] Assembly plate 1 is in the shape of an inverted U;

[0036] Assembly tube 2 is embedded in the top of assembly plate 1, and hydraulic rod 3 that provides the pulling power of anchor rod is installed on the inner wall of assembly tube 2.

[0037] An inverted U-shaped connecting plate 4 is positioned below the hydraulic rod 3. A hollow tube 5 is connected to the top of the connecting plate 4. A movable rod 6 is installed inside the hollow tube 5. The movable rod 6 is connected and fixed to the moving part of the hydraulic rod 3. A pressure sensor 7 is connected to the bottom of the movable rod 6. A vertical spring 8 is connected between the pressure sensor 7 and the connecting plate 4. An observation window for the pressure sensor 7 to observe is embedded in the outer periphery of the hollow tube 5. The hydraulic rod 3 is controlled to contract to perform an anchor pull-out test. When pulled, the movable rod 6 will move upward, thereby pulling the vertical spring 8, which will move the connecting plate 4 and the anchor ring 9 upward. The anchor ring 9 will move slightly upward to ensure that the clamp 10 fixes the anchor rod. The continuous extension of the vertical spring 8 can express the continuous increase of the tensile force, and finally obtain the required anchor pull-out data.

[0038] Anchor ring 9 is connected and fixed to connecting plate 4. Anchor ring 9 has a funnel-shaped movable channel inside. Multiple trapezoidal clamps 10 for fixing anchor rods are set in the movable channel. Anti-slip textures are formed on the inner wall of the movable channel and the outer periphery of the clamps 10.

[0039] To ensure the stability of the clamping piece 10, a connecting rod 11 is connected to the top of the anchor ring 9. The connecting rod 11 is rotatably connected to the pressure plate 12 via a bearing. The bottom end of the pressure plate 12 is connected to a clamping spring 13 for holding the clamping piece 10 in place. The whole assembly is placed in the designated position, and the anchor ring 9 is fitted onto the outer circumference of the anchor rod. The anchor rod is located at the center of the anchor ring 9. The clamping piece 10 is placed in place, and the clamping piece 10 is held in place by the clamping spring 13 in a contracted state.

[0040] For counterweight purposes, the top of the assembly plate 1 is detachably connected to a number of storage boxes 14 for storing miscellaneous items. The storage boxes 14 are equipped with power supply equipment, switching equipment and other necessary equipment required for operation. The top of the storage box 14 is rotatably connected to a box cover 15.

[0041] For counterweighting, hollow plates 16 are fixedly connected to both sides of the assembly plate 1. A counterweight plate 17 is provided on the outer periphery of the assembly plate 1 in combination with the hollow plates 16. A C-shaped limiting plate 18 for limiting the counterweight plate 17 is connected to the outer periphery of the assembly plate 1. A limiting threaded tube 19 is embedded in the top of the hollow plate 16. The limiting threaded tube 19 is threadedly connected to a clamping threaded rod 20 for clamping and fixing. If the counterweight is insufficient, the counterweight plate 17 can be removed, placed inside the hollow plate 16, and the clamping threaded rod 20 can be rotated to clamp and fix it. Items can be placed on the counterweight plate 17, the hollow plate 16, and inside the storage box 14 to increase the counterweight weight.

[0042] Working principle

[0043] The anchor bolt puller is placed in the designated position, with the anchor ring 9 fitted onto the outer circumference of the anchor bolt and the anchor bolt positioned at the center of the anchor ring 9. The clamping plate 10 is then placed and held in place by the tensioning spring 13 in a retracted state. If the counterweight is insufficient, the counterweight plate 17 can be removed and placed inside the hollow plate 16. The tensioning threaded rod 20 is then rotated to secure it. Items are placed on the counterweight plate 17, the hollow plate 16, and inside the storage box 14 to increase the counterweight's weight.

[0044] The hydraulic rod 3 is controlled to retract to perform the anchor pull-out test. When pulled, it will drive the movable rod 6 to move upward, thereby pulling the vertical spring 8, which in turn drives the connecting plate 4 and the anchor ring 9 to move upward. The anchor ring 9 will move slightly upward to ensure that the clamp 10 fixes the anchor rod. The continuous extension of the vertical spring 8 can express the continuous increase of the tensile force, and finally obtain the required anchor pull-out data.

[0045] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anchor bolt pull-out device, characterized in that, include: Assembly plate (1) is in the shape of an inverted U; An assembly tube (2) is embedded in the top of the assembly plate (1), and a hydraulic rod (3) that provides the pulling power of the anchor rod is installed on the inner wall of the assembly tube (2). An inverted U-shaped connecting plate (4) is set below the hydraulic rod (3). A hollow tube (5) is connected to the top of the connecting plate (4). A movable rod (6) is provided in the inner cavity of the hollow tube (5). The movable rod (6) is connected and fixed to the moving part of the hydraulic rod (3). A pressure sensor (7) is connected to the bottom of the movable rod (6). A vertical spring (8) is connected between the pressure sensor (7) and the connecting plate (4). An observation window for the pressure sensor (7) to observe is installed in the outer periphery of the hollow tube (5). An anchor ring (9) is connected and fixed to a connecting plate (4). The interior of the anchor ring (9) has a funnel-shaped movable channel, and multiple trapezoidal clamps (10) for fixing the anchor rod are provided in the movable channel.

2. The anchor bolt pull-out device according to claim 1, characterized in that, The inner wall of the active channel and the outer periphery of the clip (10) are provided with anti-slip texture, and the top of the anchor ring (9) is connected to a connecting rod (11).

3. The anchor bolt pull-out device according to claim 2, characterized in that, The connecting rod (11) is rotatably connected to a pressure plate (12) via a bearing, and the bottom end of the pressure plate (12) is connected to a clamping spring (13) for pressing against the clamping piece (10).

4. The anchor bolt pull-out device according to claim 1, characterized in that, The top of the assembly plate (1) is detachably connected to a plurality of storage boxes (14) for storing miscellaneous items, and the top of the storage box (14) is rotatably connected to a box lid (15).

5. The anchor bolt pull-out device according to claim 4, characterized in that, Hollow plates (16) are fixedly connected to both sides of the assembly plate (1), and a counterweight plate (17) is provided on the outer periphery of the assembly plate (1) to be combined with the hollow plates (16).

6. The anchor bolt pull-out device according to claim 5, characterized in that, The outer periphery of the assembly plate (1) is connected to a C-shaped limiting plate (18) for limiting the counterweight plate (17), and a limiting threaded tube (19) is embedded in the top of the hollow plate (16).

7. The anchor bolt pull-out device according to claim 6, characterized in that, The limiting threaded tube (19) is threadedly connected to a clamping threaded rod (20) for clamping and fixing.

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