Anchor rod pull-out test device

Abstract

The utility model discloses an anchor rod pull-out test device which comprises a supporting plate, a supporting rod, a pull rod, an annular base and a remote display terminal, the annular base adapts to a pit on the outer side of a ring sleeve on the top of a steel wire rope anchor rod and is fixed, and the annular base serves as an installation foundation of the supporting rod and the supporting plate structure. The supporting lugs laterally arranged on the annular base are used for limiting and supporting the supporting rods so as to enhance the supporting stability of the structure on the slope of the slope, the arranged supporting rods are in threaded connection with the supporting plate, the height of the portions, extending out of the supporting plate, of the supporting rods can be adjusted so as to adapt to measurement sites of different plane heights and limited supporting faces, and in the adjusting process, the supporting rods can be conveniently adjusted. The laser distance measuring sensor arranged at the bottom of the reference supporting plate towards the detection plate vertically connected to the pull rod detects the distance and displays the distance on the remote display terminal, so that the supporting plate is kept parallel to the detection plate, the pull rod is ensured to be perpendicular to the supporting plate and the hollow jack on the supporting plate, and the accuracy of a pull-out test result is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt construction detection. More specifically, the utility model relates to a bolt pulling test device. Background Technique

[0002] When carrying out bolt support on a slope, strength detection must be carried out. Generally, a bolt pulling force test is adopted, and the equipment used is generally a bolt puller. At present, when carrying out bolt support, a ring sleeve is arranged at the top of a wire rope bolt. Before digging the bolt pit, a concave pit with a depth not less than the exposed length of the ring sleeve of the wire rope bolt is chiseled at each hole position. Generally, the diameter is 20 cm and the depth is 20 cm. Since the head of the wire rope bolt is annular, the bolt puller cannot directly apply a pulling force to the wire rope bolt. At the same time, the slope surface is irregular and the space is limited, resulting in difficult test operation of the existing bolt pulling test equipment at the end of the wire rope bolt, and it is also easy to generate deviation in the axial direction between the oil cylinder and the wire rope bolt. Summary of the Invention

[0003] The purpose of the utility model is to provide a bolt pulling test device to solve the technical problem that the existing bolt pulling test device has limited space at the end of the wire rope bolt and is difficult to carry out a stable test.

[0004] In order to achieve these purposes and other advantages of the utility model, a bolt pulling test device is provided, including:

[0005] A support plate, with a through hole opened in the middle thereof, and screw holes symmetrically opened at positions near the side edges of the support plate. The axes of the screw holes and the through hole are perpendicular to the plane where the support plate is located. Laser distance sensors are symmetrically arranged along the circumference outside the through hole at the bottom of the support plate, and the upper surface of the support plate is used to install a hollow jack along the coaxial direction;

[0006] Support rods, one for each screw hole, the upper ends of the support rods penetrate into the screw holes and are coaxially threadedly connected with the screw holes, and the bottoms of the support rods are provided with supporting feet for supporting on the slope surface;

[0007] A pull rod, which is arranged through the support plate along the axial direction of the through hole. One end of the pull rod is provided with an external thread, and the other end is provided with a hook. The traction direction of the hook is upward, and is used to axially pull the ring sleeve outward along the steel wire mesh bolt. A detection plate is radially connected outward on the pull rod near the hook. The laser distance sensor is used to measure the distance to the corresponding position of the detection plate. The end of the pull rod with the external thread passes upward through the hollow jack and is connected with a jacking nut. The hollow jack jacks up the jacking nut for carrying out the pulling test;

[0008] The annular base is in a bowl-shaped structure. The bottom opening of the annular base is larger than the size of the ring sleeve of the wire rope bolt. The lower end of the annular base is used to be embedded and fixed in the pit outside the top ring sleeve of the wire rope bolt. The upper end of the base is higher than the pit, and the outer side wall of the upper end is connected with a support ear outward. One support ear corresponds to one support rod and is used to support the support rod upward along the direction parallel to the support plate.

[0009] The remote display terminal is respectively communicatively connected with the hydraulic drive end of the hollow jack and the laser distance measuring sensor.

[0010] Preferably, the connection part of the pull rod and the hook is bent axially downward relatively, and the center of the bottom of the hook is aligned with the central axis of the pull rod.

[0011] Preferably, a limiting ring is arranged on the outer side of the hollow jack corresponding to the side where the support plate installs the hollow jack.

[0012] Preferably, a perforation is vertically opened on the bent part at the lower end of the side wall of the annular base, and an anchor bolt is inserted into the perforation. The anchor bolt is used to be inserted into the slope surface along the perforation to fix the annular base at the pit.

[0013] Preferably, taking the radial direction of the upper end of the annular base in the horizontal direction as the boundary, the outer end of the support ear corresponding to the support rod located below the boundary is set as a support hook to hook the corresponding support rod upward, and the outer end of the support ear corresponding to the support rod located above the boundary is set as a support groove to support the corresponding support rod upward.

[0014] The utility model has at least the following beneficial effects: The bolt pull-out test device of the utility model includes a support plate, a support rod, a pull rod, an annular base, and a remote display terminal. By setting the annular base to adapt to the pit outside the top ring sleeve of the wire rope bolt for fixation, as the installation foundation of the support rod and support plate structure, using the support ears arranged laterally on the annular base to limit and support the support rod to enhance the support stability of the structure on the slope surface of the slope. The support rod and the support plate are threadedly connected, and the height of the support rod extending out of the support plate can be adjusted to adapt to the measurement site with different plane heights and the limited support surface. During the adjustment process, refer to the distance detected by the laser distance measuring sensor arranged on the detection plate vertically connected to the pull rod at the bottom of the support plate and displayed on the remote display terminal to keep the support plate parallel to the detection plate, so as to ensure that the pull rod is perpendicular to the support plate and the hollow jack on the support plate, and ensure the accuracy of the pull-out test result.

[0015] Other advantages, objectives, and features of the utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the utility model. Description of the Drawings

[0016] Figure 1 is the front sectional view structure diagram of the present utility model;

[0017] Figure 2 is the external front view structure diagram of the present utility model;

[0018] Explanation of reference numerals in the accompanying drawings of the specification: 1. Support plate, 2. Through hole, 3. Screw hole, 4. Laser distance sensor, 5. Hollow jack, 6. Support rod, 7. Support foot, 8. Tie rod, 9. Hook, 10. Detection plate, 11. Jacking nut, 12. Ring base, 13. Support ear, 14. Limit ring, 15. Anchor rivet, 100. Steel wire rope anchor, 101. Ring sleeve, 102. Pit. Specific implementation mode

[0019] The following further describes the present utility model in detail with reference to the accompanying drawings, so that those skilled in the art can implement it according to the description in the specification.

[0020] In the description of the present utility model, the orientation or positional relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0021] As Figure 1 、 Figure 2 shown, the anchor pull-out test device of the present utility model includes:

[0022] A support plate 1, in the middle of which there is a through hole 2, and screw holes 3 are symmetrically arranged at positions close to the side of the support plate 1. The axes of the screw holes 3 and the through hole 2 are perpendicular to the plane where the support plate 1 is located. Laser distance sensors 4 are symmetrically arranged circumferentially on the bottom of the support plate 1 outside the through hole 2. The upper surface of the support plate 1 is used to install a hollow jack 5 along the coaxial direction;

[0023] Support rods 6, one for each screw hole 3. The upper end of the support rod 6 penetrates into the screw hole 3 and is threadedly connected with the screw hole 3 coaxially. A support foot 7 is arranged at the bottom of the support rod 6 for supporting on the slope surface;

[0024] The pull rod 8 passes through the supporting plate 1 along the axial direction of the through hole 2. One end of the pull rod 8 is provided with an external thread, and the other end is provided with a hook 9. The pulling direction of the hook 9 is upward, which is used to pull the collar 101 axially outward along the steel wire mesh anchor rod. A detection plate 10 is radially outwardly connected to the pull rod 8 near the hook 9. The laser distance measuring sensor 4 is used to measure the distance to the corresponding position of the detection plate 10. The end of the pull rod 8 with the external thread passes upward through the hollow jack 5 and then is connected to the jacking nut 11. The hollow jack 5 jacks up the jacking nut 11 for the pull-out test;

[0025] The annular base 12 is in a bowl-shaped structure. The bottom opening of the annular base 12 is larger than the size of the collar 101 of the steel wire rope anchor rod 100. The lower end of the annular base 12 is used to be embedded and fixed in the pit 102 outside the top collar 101 of the steel wire rope anchor rod 100. The upper end of the base is higher than the pit 102 and the side wall of the upper end is outwardly connected with a support ear 13. One support ear 13 corresponds to one support rod 6, which is used to support the support rod 6 upward along the direction parallel to the supporting plate 1;

[0026] The remote display terminal is respectively communicatively connected to the hydraulic drive end of the hollow jack 5 and the laser distance measuring sensor 4.

[0027] The plane where the detection board 10 is located is perpendicular to the axial direction of the pull rod 8. The hydraulic jacking force of the hollow jack 5 and the data of multiple laser distance sensors 4 are obtained through the set remote display terminal. In principle, the support plate 1 and the detection board 10 are parallel to each other. Through the change in the distance of the detection board 10 feedback by multiple laser distance sensors 4, it can be known whether the support of the support plate 1 and the support rod 6 for the hollow jack 5 and the pull rod 8 is perpendicular to the plane where the support plate 1 is located, and whether the pull rod 8 ensures that the direction of pulling the wire rope bolt 100 is on the same axial line. If the laser distance sensor 4 detects that the pull rod 8 deviates from the axial line, it is adjusted in time by the length of the support rod 6 extending out of the screw hole 3 of the support plate 1 and then fixed. The fixing method can select a conventional fixing nut structure. For the situation where the slope surface is uneven, the position of the support rod 6 relative to the support plate 1 can also be adjusted adaptively. For a slope surface with a certain slope, only setting the structure of the support plate 1 and the support rod 6 is not easy to maintain the support stability during the test process. Therefore, at the pit 102 provided on the outer side of the top ring 101 of the wire rope bolt 100, the annular base 12 is basically embedded downward into the pit 102. The outer size of the annular base 12 is set according to the pit 102. Generally, the diameter of the pit 102 is 20 cm and the depth is 20 cm. The middle of the annular base 12 is open for sleeving downward on the outer side of the ring 101. The support ear 13 is provided on the outer side of the annular base 12 corresponding to the position of the screw hole 3 on the support plate 1 to ensure that the support position is coaxial and the support direction is perpendicular. After the annular base 12 is fixed at the pit 102, the support ear 13 hooks or abuts against the support rod 6 at the corresponding position, which is beneficial to stably support the support plate 1. The annular base 12, the support rod 6, and the support plate 1 are installed in sequence. Before installing the support plate 1, the pull rod 8 is pre-passed upward, and then the hollow jack 5 is installed, and the upper end of the pull rod 8 is sleeved. A fixing nut is screwed on the upper end of the pull rod 8. According to the data transmitted by the laser distance sensor 4 to the remote display terminal, the position and orientation of the lower end hook 9 of the pull rod 8 hooking the ring 101 are adjusted, and the installation of the bolt pulling test device is completed. During the test, the hydraulic pump of the hollow jack 5 is started to push and lift the jacking nut 11 for testing, and the test data is displayed on the remote display terminal. The hollow jack 5 and the wire rope bolt 100 used in this embodiment are both mature products in the technical field, and the relevant technical principles and usage methods are not elaborated here.

[0028] The bolt pull-out test device of the utility model includes a backing plate 1, a support rod 6, a pull rod 8, an annular base 12, and a remote display terminal. By setting the annular base 12 to fit the concave pit 102 outside the top ring sleeve 101 of the wire rope bolt 100 for fixation, it serves as the installation foundation for the support rod 6 and the backing plate 1 structure. The support rod 6 is limited and supported by the support ear 13 laterally arranged on the annular base 12 to enhance the support stability of the structure on the slope surface. The support rod 6 and the backing plate 1 are threadedly connected, and the height of the support rod 6 extending out of the backing plate 1 can be adjusted to adapt to the measurement site with non-uniform plane heights and the limited support surface. During the adjustment process, the laser distance sensor 4 set with reference to the bottom of the backing plate 1 facing the detection plate 10 vertically connected to the pull rod 8 detects the distance and displays it on the remote display terminal to keep the backing plate 1 parallel to the detection plate 10, thereby ensuring that the pull rod 8 is perpendicular to the backing plate 1 and the hollow jack 5 on the backing plate 1, and ensuring the accuracy of the pull-out test results.

[0029] In another technical solution, as Figure 1-2 shown, the connection part of the pull rod 8 with the hook 9 is bent axially downward, and the center of the bottom of the hook 9 is aligned with the central axis of the pull rod 8. By setting the lower end of the pull rod 8 to a bent structure at the transition connection of the hook 9, it is beneficial to ensure that the bottom of the hook 9, that is, the pulling position with the ring sleeve 101 of the wire rope bolt 100, is consistent with the axis of the pull rod 8.

[0030] In another technical solution, as Figure 1-2 shown, on one side of the backing plate 1 where the hollow jack 5 is installed, a limiting ring 14 is provided corresponding to the outside of the hollow jack 5 to quickly place and install the hollow jack 5, and it can also play a supporting role to prevent the hollow jack 5 from tipping over.

[0031] In another technical solution, as Figure 1-2 shown, a perforation is vertically opened on the bent part at the lower end of the side wall of the annular base 12, and an anchor bolt 15 is inserted into the perforation. The anchor bolt 15 is used to be inserted into the slope surface along the perforation to fix the annular base 12 at the concave pit 102.

[0032] The nail part of the anchor bolt 15 is driven into the slope along the axis of the perforation for fixation, and the head of the anchor bolt 15 abuts against the inner wall at the lower end of the annular base 12 to better fix the annular base 12 at the concave pit 102. Of course, the concave pit 102 can be appropriately trimmed or enlarged to facilitate the placement of the annular base 12, and then the concave pit 102 can be backfilled and trimmed.

[0033] In another technical solution, as Figure 1-2As shown, taking the radial direction of the upper end of the annular base 12 in the horizontal direction as the boundary, the outer end of the support ear 13 corresponding to the support rod 6 located below the boundary is provided as a support hook to hook the corresponding support rod 6 upward, and the outer end of the support ear 13 corresponding to the support rod 6 located above the boundary is provided as a support groove to support the corresponding support rod 6 upward.

[0034] For structures such as the annular base 12 and the support rod 6 in an inclined state, the support ear 13 corresponding to the support rod 6 below is provided with a support hook structure, and the support rod 6 corresponding to the upper part or on approximately the same horizontal line is provided with a support groove structure, so as to avoid generating forces in other directions directly on the support rod 6 and only provide the support force perpendicular to the axis of the support rod 6. Thus, the annular base 12 fixed at the pit 102 provides the connection support for the support rod 6 and the support plate 1.

[0035] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the drawings shown and described here.

Claims

1. An anchor rod pull-out test device, characterized in that, Comprising: A pallet, with a through-hole opened in the middle thereof, and screw holes symmetrically opened at positions near the side edges of the pallet. The axes of the screw holes and the through-hole are perpendicular to the plane where the pallet is located. Laser distance sensors are symmetrically arranged circumferentially on the outside of the through-hole at the bottom of the pallet. The upper surface of the pallet is used to install a hollow jack coaxially; Support rods, with one corresponding to each screw hole. The upper end of the support rod penetrates into the screw hole and is coaxially threadedly connected to the screw hole. The bottom of the support rod is provided with a supporting foot for supporting on the slope surface; A pull rod, which is arranged through the pallet along the axial direction of the through-hole. One end of the pull rod is provided with an external thread, and the other end is provided with a hook. The pulling direction of the hook is upward, and it is used to axially pull the collar outward along the steel wire mesh anchor rod. A detection plate is radially outwardly connected to the pull rod near the hook. The laser distance sensor is used to measure the distance to the corresponding position of the detection plate. The end of the pull rod with the external thread passes upward through the hollow jack and is connected to a jacking nut. The hollow jack jacks up the jacking nut for a pull-out test; An annular base, which is in a bowl-shaped structure. The bottom opening of the annular base is larger than the size of the collar of the wire rope anchor rod. The lower end of the annular base is used to be embedded and fixed in the pit outside the top collar of the wire rope anchor rod. The upper end of the base is higher than the pit and the outer side wall of the upper end is outwardly connected with a support ear. One support ear corresponds to one support rod and is used to support the support rod upward along the direction parallel to the pallet; A remote display terminal, which is respectively communicatively connected to the hydraulic drive end of the hollow jack and the laser distance sensor.

2. The anchor rod pull-out test device according to claim 1, characterized in that, The connection part of the pull rod and the hook is bent axially downward relatively, and the center of the bottom of the hook is aligned with the central axis of the pull rod.

3. The anchor rod pull-out test device according to claim 1, characterized in that, On the side of the pallet where the hollow jack is installed, a limiting ring is correspondingly arranged outside the hollow jack.

4. The bolt pull-out test device according to claim 1, characterized in that, Perforations are vertically opened on the bent part at the lower end of the side wall of the annular base. Anchor bolts are inserted into the perforations and are used to be inserted into the slope surface along the perforations to fix the annular base at the pit.

5. The anchor rod pull-out test device according to claim 1, characterized in that, Taking the radial direction in the horizontal direction at the upper end of the annular base as the boundary, the outer ends of the support ears corresponding to the support rods located below the boundary are set as support hooks to hook the corresponding support rods upward, and the outer ends of the support ears corresponding to the support rods located above the boundary are set as support grooves to support the corresponding support rods upward.

Images