A high-precision displacement measuring device for anchor rod pull-out test

Abstract

The utility model relates to the anchor rod drawing test displacement measurement technical field, proposes a kind of high-precision anchor rod drawing test displacement measurement device, including support seat, the top fixed mounting of support seat has anchor rod puller, the inside fixed clamping of anchor rod puller has anchor rod, the both ends of support seat top are fixedly connected with telescopic guide rod, the top of two telescopic guide rods are fixedly connected with fixed sleeve, two fixed sleeves are fixedly connected with annular plate between, the both ends of annular plate inside are all provided with the positioning mechanism for being fixed to anchor rod, the top end of anchor rod is sleeved with mounting bracket, the inside of mounting bracket is provided with several with the locking piece of anchor rod fixed, several locking pieces are distributed with mounting bracket isometric angle, the top of mounting bracket is fixedly connected with dial gauge. The utility model is through rigid support and multiple locking mechanism, not only solve the problem of big measurement error, poor stability in the prior art, also improve test efficiency and data reliability.

Description

Technical Field

[0001] This utility model relates to the field of anchor bolt pull-out test displacement measurement technology, specifically, to a high-precision anchor bolt pull-out test displacement measurement device. Background Technology

[0002] Anchor pull-out tests are a key testing method in geotechnical and civil engineering, primarily used to evaluate the anchoring performance and bearing capacity of anchors in rock or concrete. Displacement measurement, as the core component of the test, directly affects the accuracy and reliability of the data. Traditional measurement methods often rely on mechanical measuring tools or simple optical equipment, which suffer from low accuracy, poor stability, and cumbersome operation. As engineering construction demands higher levels of safety and accuracy, existing technologies are no longer sufficient to meet the needs of high-precision measurement, specifically exhibiting the following technical deficiencies: First, existing displacement measuring devices (such as mechanical dial gauges or simple sensors) are susceptible to environmental vibrations, human error, and insufficient rigidity of the equipment itself, resulting in large fluctuations in measurement data and making it difficult to capture micron-level displacement changes. Second, existing devices typically fix anchor bolts directly with bolts or clamps, but lack effective center positioning and multiple locking mechanisms. Anchor bolts may deflect or slip during the pull-out process, causing the measurement reference to fail; and the support frame often uses simple columns or non-guided structures, which are prone to deformation or swaying during high-pressure pull-out, further amplifying measurement errors. In view of this, this utility model proposes a high-precision anchor pull-out test displacement measurement device. Summary of the Invention

[0003] This invention proposes a high-precision displacement measuring device for anchor bolt pull-out tests, which solves the problem that displacement measuring devices in the prior art are easily affected by environmental vibrations, leading to larger measurement errors.

[0004] The technical solution of this utility model is as follows: A high-precision anchor bolt pull-out test displacement measuring device includes a support base, an anchor bolt puller is fixedly installed on the top of the support base, an anchor bolt is fixedly clamped on the inner side of the anchor bolt puller, telescopic guide rods are fixedly connected to both ends of the top of the support base, fixed sleeves are fixedly connected to the top of the two telescopic guide rods, an annular plate is fixedly connected between the two fixed sleeves, positioning mechanisms for fixing the anchor bolt are provided at both ends of the inner side of the annular plate, a mounting frame is sleeved on the top of the anchor bolt, a plurality of locking parts for fixing the anchor bolt are provided on the inner side of the mounting frame, the plurality of locking parts are distributed at equal angles around the mounting frame, and a dial indicator is fixedly connected to the top of the mounting frame.

[0005] Preferably, the telescopic guide rod includes a sleeve portion, and an insertion portion that penetrates the top wall of the sleeve portion is slidably connected to the inner side of the sleeve portion, and the top of the insertion portion is fixedly connected to the fixed sleeve.

[0006] Preferably, the telescopic guide rod further includes a limiting block fixedly connected to the bottom of the insertion part, and the limiting block is slidably connected to the inner wall of the insertion part.

[0007] Preferably, the positioning mechanism includes an insert plate that penetrates the fixed sleeve, the insert plate being slidably connected to the fixed sleeve, a connecting rod being fixedly connected to one end of the insert plate, and a positioning plate that abuts against the anchor rod being fixedly connected to one end of the connecting rod.

[0008] Preferably, the positioning mechanism further includes a toothed plate fixedly connected to the top of the insert plate, a transmission gear rotatably connected to the top of the fixed sleeve, the transmission gear meshing with the toothed plate, and an operating element for driving the transmission gear to rotate at one end of the fixed sleeve.

[0009] Preferably, the top of the fixed sleeve is provided with an assembly groove, and the transmission gear is located inside the assembly groove.

[0010] Preferably, the operating component includes a worm gear fixed coaxially with the transmission gear, a support is fixedly connected to the outer side of the fixed sleeve, a worm gear meshing with the worm gear is rotatably connected to the support, and a first rotating cap is fixedly connected to one end of the worm gear.

[0011] Preferably, the locking element includes a screw rod that penetrates the side wall of the mounting bracket, the screw rod being threadedly connected to the mounting bracket, one end of the screw rod being rotatably connected to a clamping plate, the clamping plate being in contact with the anchor rod by translation, and the other end of the screw rod being fixedly connected to a second rotating cap.

[0012] The beneficial effects of this utility model are as follows: 1. Using a dial indicator as the measuring tool, combined with a rigid support frame, it can capture micron-level displacement changes, ensuring accurate and reliable data; the design of the telescopic guide rod can ensure that the annular plate and the fixed sleeve move strictly vertically, avoiding measurement deviation; the limit block prevents the insertion part from disengaging from the sleeve part, enhancing the safety and reliability of the device and reducing errors caused by shaking. 2. The positioning mechanism achieves fine adjustment through worm gear transmission, pushing the toothed plate and insert plate to move horizontally, so that the positioning plate accurately contacts the anchor rod and ensures that the anchor rod is in the center position; the self-locking characteristics of the worm gear and worm prevent accidental loosening and maintain a stable fixed state.

[0013] 3. The locking components drive the clamping plate to contact the anchor bolt surface via the screw. Multiple locking components are distributed at equal angles around the anchor bolt to apply force evenly and prevent relative sliding between the mounting bracket and the anchor bolt. The clamping plate can adaptively adjust its angle as the screw rotates to avoid damage to the anchor bolt surface caused by point contact. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of a high-precision anchor pull-out test displacement measuring device according to an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of the telescopic guide rod according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the positioning mechanism according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the structure of the operating component according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the locking component according to an embodiment of the present utility model.

[0016] In the diagram: 1. Support base; 2. Anchor bolt puller; 3. Anchor bolt; 4. Telescopic guide rod; 41. Sleeve part; 42. Insertion part; 43. Limiting block; 5. Fixing sleeve; 6. Annular plate; 7. Positioning mechanism; 71. Insert plate; 72. Connecting rod; 73. Positioning plate; 74. Tooth plate; 75. Transmission gear; 76. Operating component; 761. Worm gear; 762. Support; 763. Worm; 764. First rotating cap; 77. Assembly slot; 8. Mounting bracket; 9. Locking component; 91. Screw; 92. Clamping plate; 93. Second rotating cap; 10. Dial indicator. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0018] like Figures 1 to 6As shown, this embodiment proposes a high-precision anchor bolt pull-out test displacement measurement device, including a support base 1, an anchor bolt puller 2 fixedly installed on the top of the support base 1, an anchor bolt 3 fixedly clamped on the inner side of the anchor bolt puller 2, telescopic guide rods 4 fixedly connected to both ends of the top of the support base 1, fixing sleeves 5 fixedly connected to the top of the two telescopic guide rods 4, an annular plate 6 fixedly connected between the two fixing sleeves 5, positioning mechanisms 7 for fixing the anchor bolt 3 are provided at both ends of the inner side of the annular plate 6, a mounting frame 8 is sleeved on the top of the anchor bolt 3, and a number of locking parts 9 fixed to the anchor bolt 3 are provided on the inner side of the mounting frame 8. The number of locking parts 9 are distributed at equal angles around the mounting frame 8, and a dial gauge 10 is fixedly connected to the top of the mounting frame 8.

[0019] In this embodiment, the support base 1 provides a stable foundation, the anchor puller 2 is fixed on it, and is used to clamp and pull the anchor rod 3. The telescopic guide rod 4 is vertically installed at both ends of the top of the support base 1, and its top is connected to the annular plate 6 through the fixing sleeve 5 to form a rigid support frame. The positioning mechanism 7 is set on the inner side of the annular plate 6 and is used to initially position and fix the anchor rod 3 to ensure that the anchor rod is in a vertical state. The dial gauge 10 is used to measure the displacement change of the anchor rod in real time during the pull-out test.

[0020] In a further preferred embodiment of the present invention, the telescopic guide rod 4 includes a sleeve portion 41, and an insertion portion 42 that penetrates the top wall of the sleeve portion 41 is slidably connected to the inner side of the sleeve portion 41. The top of the insertion portion 42 is fixedly connected to the fixed sleeve 5, and a limiting block 43 is fixedly connected to the bottom of the insertion portion 42. The limiting block 43 is slidably connected to the inner wall of the insertion portion 42.

[0021] In this embodiment, the insertion part 42 slides vertically along the sleeve part 41, ensuring that the moving directions of the annular plate 6 and the fixed sleeve 5 are strictly perpendicular, thus avoiding measurement deviation; the limiting block 43 effectively prevents the insertion part 42 from disengaging from the sleeve part 41, thereby enhancing the safety and reliability of the device.

[0022] In a further preferred embodiment of this utility model, the positioning mechanism 7 includes an insert plate 71 that penetrates the fixed sleeve 5. The insert plate 71 is slidably connected to the fixed sleeve 5. A connecting rod 72 is fixedly connected to one end of the insert plate 71. A positioning plate 73 that abuts against the anchor rod 3 is fixedly connected to one end of the connecting rod 72. A toothed plate 74 is fixedly connected to the top of the insert plate 71. A transmission gear 75 is rotatably connected to the top of the fixed sleeve 5. The transmission gear 75 meshes with the toothed plate 74. An assembly groove 77 is provided on the top of the fixed sleeve 5. The transmission gear 75 is located inside the assembly groove 77. An operating member 76 for driving the transmission gear 75 to rotate is provided at one end of the fixed sleeve 5. The operating member 76 includes a worm gear 761 that is coaxially fixed with the transmission gear 75. A support 762 is fixedly connected to the outside of the fixed sleeve 5. A worm 763 that meshes with the worm gear 761 is rotatably connected to the support 762. A first rotating cap 764 is fixedly connected to one end of the worm 763.

[0023] In this embodiment, rotating the first rotating cap 764 drives the worm 763 to rotate, causing the worm wheel 761 to drive the transmission gear 75, which is fixed coaxially with it, to rotate synchronously. Since the transmission gear 75 meshes with the toothed plate 74, it can push the toothed plate 74 and the insert plate 71 to move horizontally, so that the positioning plate 73 contacts or disengages from the anchor rod 3. The entire design achieves fine adjustment through worm gear transmission. The positioning plate 73 can accurately contact the anchor rod 3, ensuring that the anchor rod 3 is in the center position and reducing measurement errors. The worm wheel 761 and the worm 763 have self-locking characteristics. The operating part 76 only needs to be slightly rotated to achieve firm fixation and will not loosen accidentally.

[0024] In a further preferred embodiment of the present invention, the locking member 9 includes a screw 91 that penetrates the side wall of the mounting bracket 8. The screw 91 is threadedly connected to the mounting bracket 8. One end of the screw 91 is rotatably connected to a clamping plate 92. The clamping plate 92 abuts against the anchor rod 3 by translation. The other end of the screw 91 is fixedly connected to a second rotating cap 93.

[0025] In this embodiment, rotating the second rotating cap 93 drives the screw 91 to rotate, causing the screw 91 to move axially. This allows the clamping plate 92 to fit against the anchor rod 3, keeping the mounting frame 8 and the anchor rod 3 fixed. Multiple locking elements 9 are distributed at equal angles around the anchor rod 3. The clamping plate 92 applies force evenly, ensuring that there is no relative sliding between the mounting frame 8 and the anchor rod 3. The clamping plate 92 and the surface of the anchor rod 3 are in surface contact, and the angle can be adaptively adjusted as the screw 91 rotates, avoiding damage to the surface of the anchor rod 3 caused by point contact.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-precision anchor pull-out test displacement measuring device, comprising a support base (1), wherein an anchor puller (2) is fixedly installed on the top of the support base (1), and an anchor puller (3) is fixedly clamped on the inner side of the anchor puller (2), characterized in that, Telescopic guide rods (4) are fixedly connected to both ends of the top of the support base (1). Fixed sleeves (5) are fixedly connected to the top of the two telescopic guide rods (4). An annular plate (6) is fixedly connected between the two fixed sleeves (5). Positioning mechanisms (7) for fixing the anchor rod (3) are provided at both ends of the inner side of the annular plate (6). An installation frame (8) is sleeved on the top of the anchor rod (3). Several locking parts (9) for fixing the anchor rod (3) are provided on the inner side of the installation frame (8). Several locking parts (9) are distributed at equal angles around the installation frame (8). A dial indicator (10) is fixedly connected to the top of the installation frame (8).

2. The high-precision anchor bolt pull-out test displacement measuring device according to claim 1, characterized in that, The telescopic guide rod (4) includes a sleeve (41), and the inner side of the sleeve (41) is slidably connected to an insertion part (42) that penetrates the top wall of the sleeve (41). The top of the insertion part (42) is fixedly connected to the fixing sleeve (5).

3. The high-precision anchor pull-out test displacement measuring device according to claim 2, characterized in that, The telescopic guide rod (4) also includes a limiting block (43) fixedly connected to the bottom of the plug-in part (42), and the limiting block (43) is slidably connected to the inner wall of the plug-in part (42).

4. The high-precision anchor bolt pull-out test displacement measuring device according to claim 1, characterized in that, The positioning mechanism (7) includes an insert plate (71) that passes through the fixed sleeve (5). The insert plate (71) is slidably connected to the fixed sleeve (5). A connecting rod (72) is fixedly connected to one end of the insert plate (71). A positioning plate (73) that abuts against the anchor rod (3) is fixedly connected to one end of the connecting rod (72).

5. The high-precision anchor pull-out test displacement measuring device according to claim 4, characterized in that, The positioning mechanism (7) also includes a toothed plate (74) fixedly connected to the top of the insert plate (71), and a transmission gear (75) is rotatably connected to the top of the fixed sleeve (5). The transmission gear (75) meshes with the toothed plate (74), and one end of the fixed sleeve (5) is provided with an operating element (76) for driving the transmission gear (75) to rotate.

6. The high-precision anchor bolt pull-out test displacement measuring device according to claim 5, characterized in that, The top of the fixed sleeve (5) is provided with an assembly groove (77), and the transmission gear (75) is located inside the assembly groove (77).

7. The high-precision anchor bolt pull-out test displacement measuring device according to claim 5, characterized in that, The operating component (76) includes a worm gear (761) coaxially fixed with the transmission gear (75), a support (762) is fixedly connected to the outside of the fixed sleeve (5), a worm (763) meshing with the worm gear (761) is rotatably connected to the support (762), and a first rotating cap (764) is fixedly connected to one end of the worm (763).

8. The high-precision anchor bolt pull-out test displacement measuring device according to claim 1, characterized in that, The locking component (9) includes a screw (91) that passes through the side wall of the mounting bracket (8). The screw (91) is threadedly connected to the mounting bracket (8). One end of the screw (91) is rotatably connected to a clamp (92). The clamp (92) abuts against the anchor rod (3) by translation. The other end of the screw (91) is fixedly connected to a second rotating cap (93).

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