A fixture for a resin anchor pull-out tester

Abstract

This utility model discloses a resin anchor pull-out tester fixture, comprising: a hydraulic cylinder, a sleeve, and an anchor cable lock. The anchor cable lock is installed on the end of the resin anchor to be tested. The sleeve is fitted on the outside of the anchor cable lock. The top of the cylinder of the hydraulic cylinder is mounted on the sleeve. The telescopic shaft of the hydraulic cylinder is connected to the anchor cable lock. The pull-out test of the resin anchor is performed by controlling the extension and retraction of the hydraulic cylinder. The anchor cable lock includes: a lock head, multiple wedge-shaped clips arranged in a ring in the lock head, and a cylinder connector. The cylinder connector is connected to the lock head through a connecting bracket. The lock head has a mounting through hole for installing the wedge-shaped clips. The end of the resin anchor passes through the mounting through hole of the lock head and is fixed in the lock head by the multiple wedge-shaped clips. The cylinder connector is used to connect and fix with the telescopic shaft of the hydraulic cylinder, realizing efficient, accurate, and stable pull-out test of the resin anchor, improving the testing efficiency and accuracy, and enhancing the applicability and reliability of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of coal mine roadway support, specifically to a resin anchor pull-out tester fixture. Background Technology

[0002] Resin anchors are commonly used components in coal mine roadway support. Their mechanism of action utilizes the coupling effect between the resin anchor and the surrounding rock to connect disturbed rock masses, thereby improving the stability of the anchored area. Specifically, the anchoring end of the resin anchor penetrates deep into the rock strata, while the exposed end connects to the fixing component. The anchor provides bearing capacity through the adhesive friction between the anchor and the surrounding rock, as well as the strength of the resin anchor itself. Resin anchor pull-out tests are a highly effective and intuitive method for conducting research on anchor support under specific engineering fields and conditions exhibiting typical differences. Therefore, their anchoring effect has a significant impact on the stability of the support structure and safe production.

[0003] However, due to the concealed nature of anchor bolt support projects, the support effect of anchor bolts can only be observed through pull-out tests on resin anchor bolts in daily support work. However, existing anchor bolt pull-out instruments have many problems and cannot meet the engineering requirements in actual use. The structural design of traditional anchor bolt pull-out instruments is unreasonable, and they cannot test resin anchor bolts, which seriously affects the implementation of engineering quality testing. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a fixture for a resin anchor pull-out tester, which overcomes the defects of existing anchor pull-out testers, enables efficient, accurate, and stable pull-out testing of resin anchors, improves testing efficiency and accuracy, and enhances the applicability and reliability of the equipment.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a resin anchor pull-out tester fixture, comprising: a hydraulic cylinder, a sleeve, and an anchor cable lock. The anchor cable lock is installed at the end of the resin anchor to be tested, the sleeve is fitted on the outside of the anchor cable lock, the top of the cylinder of the hydraulic cylinder is mounted on the sleeve, and the telescopic shaft of the hydraulic cylinder is connected to the anchor cable lock. The resin anchor is pulled out by controlling the extension and retraction of the hydraulic cylinder.

[0006] The anchor cable lock includes: a lock head, multiple wedge-shaped clips arranged in a ring within the lock head, and a hydraulic cylinder connector. The hydraulic cylinder connector is connected to the lock head via a connecting bracket. The lock head has mounting through holes for installing the wedge-shaped clips. The end of the resin anchor rod passes through the mounting through holes of the lock head and is fixed in the lock head by the multiple wedge-shaped clips. The hydraulic cylinder connector is used to connect and fix with the telescopic shaft of the hydraulic cylinder.

[0007] Furthermore, the anchor cable lock is coaxially arranged with the telescopic shaft of the hydraulic cylinder.

[0008] Furthermore, the mounting through hole is a tapered hole.

[0009] Furthermore, multiple wedge-shaped clips arranged in a ring form a lock cylinder with a conical outer wall. The lock cylinder has a tightening hole at its center for installing resin anchor rods.

[0010] Furthermore, the contact surface between the wedge-shaped clip and the resin anchor rod is provided with anti-slip texture.

[0011] Furthermore, gaps are provided between adjacent wedge-shaped clips.

[0012] The beneficial effects of this utility model are:

[0013] (1) The fixture has a simple structure, is small and convenient, and is easy to operate. It can be manufactured by itself according to the drawings. Compared with non-destructive testing instruments on the market, it has the characteristics of low cost and high efficiency.

[0014] (2) It closely fits the complex characteristics of the underground construction environment, is easy to use, and can be put into use after simple training of construction personnel, thus improving the efficiency of the pull-out test of resin anchor bolts;

[0015] (3) The anchoring mechanism based on the anchor cable locking principle can quickly and firmly anchor resin anchor rods of different specifications, which greatly improves the applicability of the equipment and reduces the time and cost of replacing equipment or accessories due to different anchor rod specifications.

[0016] (4) The sleeve ensures the stability of the pull-out test, reduces the impact of equipment shaking or unstable tension on the test results, and improves accuracy and safety;

[0017] (5) This utility model has good performance and improves the efficiency and accuracy of resin anchor pull-out test. It has a simple structure, reliable operation, convenient operation, high cost performance, and achieves the expected effect. It can meet the requirements of resin anchor pull-out test and is recommended to be promoted and used. Attached Figure Description

[0018] Figure 1 This is a partial half-sectional view of the structure of this utility model during use;

[0019] Figure 2 This is an enlarged schematic diagram of the anchor cable locking device;

[0020] Figure 3 This is a magnified schematic diagram of a hydraulic cylinder.

[0021] Figure 4 This is a schematic diagram of the enlarged structure of the sleeve;

[0022] Figure 5 An enlarged schematic diagram of the lock head and wedge clip after installation;

[0023] Figure 6 This is a schematic diagram of the exploded structure of the lock head and wedge clip;

[0024] In the diagram: 1. Resin anchor bolt; 2. Hydraulic cylinder; 3. Sleeve; 4. Lock head; 5. Wedge clamp; 6. Cylinder connector. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0027] like Figure 1-6 As shown, a resin anchor pull-out tester fixture includes: a hydraulic cylinder 2, a sleeve 3, and an anchor cable lock. The anchor cable lock is installed at the end of the resin anchor 1 to be tested. The sleeve 3 is fitted on the outside of the anchor cable lock. The top of the cylinder of the hydraulic cylinder 2 is mounted on the sleeve 3. The telescopic shaft of the hydraulic cylinder 2 is connected to the anchor cable lock. The resin anchor 1 is pulled out by controlling the telescopic movement of the hydraulic cylinder 2.

[0028] like Figure 1 , 2 As shown, the anchor cable lock includes: a lock head 4, multiple wedge-shaped clips 5 arranged in a ring in the lock head 4, and a cylinder connector 6. The cylinder connector 6 is connected to the lock head 4 through a connecting bracket. The lock head 4 is provided with an installation through hole for installing the wedge-shaped clips 5. The end of the resin anchor rod 1 passes through the installation through hole of the lock head 4 and is fixed in the lock head 4 by the multiple wedge-shaped clips 5. The cylinder connector 6 is used to connect and fix with the telescopic shaft of the hydraulic cylinder 2.

[0029] The lock head 4 and the cylinder connector 6 are integrated into one structure.

[0030] like Figure 1-3 As shown, the anchor cable lock and the telescopic shaft of the hydraulic cylinder 2 are coaxially arranged to ensure uniform load distribution during testing.

[0031] The mounting through hole is a conical hole, and multiple wedge-shaped clips 5 arranged in a ring form a lock cylinder with a conical outer wall. The lock cylinder has a tightening hole in the center for installing the resin anchor rod 1. By cooperating with the mounting through hole and the multiple wedge-shaped clips 5 arranged in a ring, the tightening hole in the lock cylinder can better tighten and fix the resin anchor rod 1. The greater the tension, the more secure the fixation.

[0032] The end of the resin anchor rod 1 passes through the installation through hole, and then the wedge-shaped clip 5 is put on the resin anchor rod 1. By applying external force, the wedge-shaped clip 5 is tightened towards the center of the anchor rod. By utilizing the friction between the wedge-shaped clip 5 and the surface of the resin anchor rod 1 and the self-locking characteristics of the wedge structure, the resin anchor rod 1 is firmly anchored. It can be adapted to various specifications of resin anchor rods 1.

[0033] like Figure 6 As shown, the contact surface between the wedge-shaped clip 5 and the resin anchor rod 1 is provided with anti-slip texture, which can better improve the friction between the wedge-shaped clip 5 and the resin anchor rod 1. The anti-slip texture is an outwardly convex anti-slip texture.

[0034] A hydraulic drive system is adopted, in which hydraulic oil is delivered to hydraulic cylinder 2 by a hydraulic pump, which pushes the piston to drive the telescopic shaft to generate tension. This tension application device can precisely adjust the magnitude of the output tension according to the experimental requirements, and can realize stable loading and unloading of tension, ensuring the accuracy and reliability of the pull-out test.

[0035] A gap is provided between adjacent wedge-shaped clips 5. As the wedge-shaped clips 5 move in the mounting through hole, the tightening hole in the lock cylinder can be gradually reduced, further improving the tensile strength between the wedge-shaped clips 5 and the resin anchor rod 1.

[0036] like Figure 1 , 3 As shown, the end of the sleeve 3 away from the hydraulic cylinder 2 is provided with a support seat for stable support of the sleeve 3, ensuring that the pull-out test is carried out in the best condition.

[0037] like Figure 1As shown, during the pull-out test of the resin anchor bolt 1, the clamp of the resin anchor bolt 1 pull-out tester is first moved to the test position of the already installed resin anchor bolt 1, ensuring that the anchor cable lock can be accurately fitted onto the resin anchor bolt 1. The sleeve 3 is then fitted onto the anchor cable lock and the resin anchor bolt 1. The telescopic shaft of the hydraulic cylinder 2 is connected to the anchor cable lock. By manually pressing the operating lever of the oil pump in the hydraulic drive system, hydraulic oil is delivered to the hydraulic cylinder 2, pushing the piston to tighten the wedge-shaped clamp 5 of the anchoring mechanism towards the center of the resin anchor bolt 1. The resin anchor rod 1 is fixed to the anchor cable lock. At the same time, under the support of the sleeve 3, the hydraulic cylinder 2 will provide a pulling force on the resin anchor rod 1, thus fixing the resin anchor rod 1 pull-out test fixture to the resin anchor rod 1 to be tested. Then, according to the anchoring force test requirements designed for the resin anchor rod 1, the hydraulic pressure continues to be applied. When the set pulling force value is reached or the resin anchor rod 1 shows displacement failure, the pulling force is stopped, the experimental data is recorded, and one pull-out test is completed. After the test, the pulling force is unloaded through the hydraulic system, and the anchor cable lock is removed.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A resin anchor pull test apparatus clamp, characterized by, include: The equipment includes a hydraulic cylinder, a sleeve, and an anchor cable lock. The anchor cable lock is installed at the end of the resin anchor rod to be tested. The sleeve is fitted on the outside of the anchor cable lock. The top of the cylinder of the hydraulic cylinder is mounted on the sleeve. The telescopic shaft of the hydraulic cylinder is connected to the anchor cable lock. The resin anchor rod is pulled out by controlling the telescopic extension of the hydraulic cylinder. The anchor cable lock includes: a lock head, multiple wedge-shaped clips arranged in a ring within the lock head, and a cylinder connector. The cylinder connector is connected to the lock head via a connecting bracket. The lock head has mounting through holes for installing the wedge-shaped clips. The end of the resin anchor rod passes through the mounting through holes of the lock head and is fixed in the lock head by the multiple wedge-shaped clips. The cylinder connector is used to connect and fix with the telescopic shaft of the hydraulic cylinder.

2. A resin anchor pull test apparatus clamp according to claim 1, characterised in that, The anchor cable lock is coaxially arranged with the telescopic shaft of the hydraulic cylinder.

3. The resin anchor pull test apparatus clamp of claim 1, wherein, The mounting through hole is a tapered hole.

4. A resin anchor pull test apparatus clamp according to claim 3, characterised in that, Multiple wedge-shaped clips arranged in a ring form a lock cylinder with a conical outer wall. The lock cylinder has a tightening hole in the center for installing resin anchor rods.

5. The resin anchor pull test apparatus clamp of claim 1, wherein, The contact surface between the wedge-shaped clip and the resin anchor rod is provided with anti-slip texture.

6. A resin anchor pull test apparatus clamp according to claim 3, wherein, There is a gap between adjacent wedge-shaped clips.

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