Anchor rod locking force testing mechanism

Abstract

The utility model discloses an anchor rod locking force testing mechanism which comprises a frame structure, the frame structure is composed of a base, a supporting leg and an adjustable fixing base arranged at the end of the supporting leg, a hydraulic loading system is fixedly arranged on the base and comprises a hydraulic cylinder and a piston rod, and an anchor rod clamping device is fixedly arranged at the end of the piston rod; a force sensor is embedded between the sleeve and the connecting end face of the piston rod; according to the utility model, through the arrangement of the adjustable fixing seat, the length can be flexibly adjusted according to the actual inclination angle of the roadway wall surface, so that the testing mechanism can be stably installed on roadway walls with different angles; in the installation process, by adjusting the adjustable fixing base, it can be guaranteed that the stroke direction of the piston rod accurately coincides with the axis of the anchor rod, the test result deviation caused by eccentric stress in the drawing test process is avoided, and the reliability of anchor rod locking force test data is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the technical field of anchor bolt measuring devices, specifically to an anchor bolt locking force testing mechanism. Background Technology

[0002] In tunnel support engineering, anchor bolt locking force is a key indicator for evaluating the effectiveness of anchor bolt support. It refers to the tightening force exerted by the anchor bolt on the surrounding rock after installation, and directly relates to the stability of the tunnel surrounding rock and the safety of the support structure. Accurate testing of anchor bolt locking force is of great significance for ensuring the quality of tunnel support and preventing safety accidents such as collapses.

[0003] Currently, anchor bolt locking force testing typically employs specialized testing mechanisms for pull-out tests. However, traditional anchor bolt locking force testing mechanisms have significant shortcomings in practical applications. Because tunnel walls often exhibit varying inclination angles and curved surfaces, the fixed structures of traditional testing mechanisms are mostly fixed designs, making it difficult to flexibly adapt to complex tunnel wall angles. During pull-out tests, to ensure the accuracy of test data, it is crucial to ensure that the piston rod and anchor bolt axis are strictly aligned; otherwise, eccentric force will lead to deviations in test results and may even cause safety hazards such as anchor bolt breakage. However, traditional mechanisms lack an effective angle adjustment mechanism, making it difficult to adjust the piston rod's stroke direction when facing tunnel walls with different inclination angles. This makes it difficult to align the piston rod with the anchor bolt axis, thus limiting the reliability of anchor bolt locking force testing. Utility Model Content

[0004] (I) Technical Issues

[0005] This invention provides a testing mechanism that can be flexibly adjusted to adapt to different inclined roadway walls, ensuring that the piston rod stroke direction coincides with the anchor rod axis, thereby accurately testing the anchor rod locking force.

[0006] (II) Technical Content

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: an anchor bolt locking force testing mechanism, including a frame structure, the frame structure consisting of a base, support legs, and an adjustable fixing seat at the end of the support legs. A hydraulic loading system is fixedly mounted on the base, the hydraulic loading system including a hydraulic cylinder and a piston rod, and an anchor bolt clamping device is fixedly mounted at the end of the piston rod. The adjustable fixing seat includes a lead screw fixedly mounted at the end of the support leg, the other end of the lead screw being threadedly connected to an internally threaded tube, and the other end of the internally threaded tube being rotatably connected to a fixing base. The fixing base is fixed to the tunnel wall by expansion bolts. The adjustable fixing seat can be adjusted to adapt to tunnel walls with different inclination angles and make the piston rod stroke direction coincide with the anchor bolt axis by adjusting its length. A force sensor is embedded between the connecting end face of the sleeve and the piston rod. A displacement sensor is fixedly mounted on the inner side of the support leg, and its measuring head points towards the side wall of the sleeve.

[0008] Furthermore, the anchor clamping device includes a sleeve fixedly disposed at the end of the piston rod, at least two sets of fastening bolts are threadedly connected to the side of the sleeve, and a V-shaped clamping plate is rotatably disposed at one end of the fastening bolts that extends into the inside of the sleeve, and a guide rod that is inserted into and connected to the side wall of the sleeve is fixedly disposed on the side of the V-shaped clamping plate.

[0009] Furthermore, the inner wall of the V-shaped card plate is fixed with anti-slip teeth for locking the tail end of the anchor rod.

[0010] Furthermore, the force sensor is a spoke-type pressure sensor, and its signal line is connected to an external data acquisition instrument.

[0011] Furthermore, the displacement sensor is a laser displacement meter.

[0012] (III) Technical Effects

[0013] Compared with the prior art, the advantages of this utility model are as follows: By setting an adjustable fixing seat and utilizing the threaded engagement between the lead screw and the internal threaded tube, the length can be flexibly adjusted according to the actual inclination angle of the tunnel wall, enabling the testing mechanism to be stably installed on tunnel walls at different angles, effectively solving the problem that traditional testing mechanisms are difficult to adapt to complex tunnel wall angles; during installation, by adjusting the adjustable fixing seat, the piston rod stroke direction can be ensured to be precisely aligned with the anchor rod axis, avoiding test result deviations caused by eccentric force during pull-out testing, and significantly improving the reliability of anchor rod locking force test data; the V-shaped clamping plate in the anchor rod clamping device, combined with anti-slip teeth, can firmly lock the tail end of the anchor rod, preventing the anchor rod from loosening or slipping during testing; the setting of force and displacement sensors can collect force and displacement data in real time during the testing process and transmit them to an external data acquisition instrument, allowing operators to intuitively understand the test situation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of an anchor bolt locking force testing mechanism according to this utility model. Figure 1 .

[0015] Figure 2 This is a three-dimensional structural diagram of an anchor bolt locking force testing mechanism according to this utility model. Figure 2 .

[0016] Figure 3 This is a three-dimensional structural diagram of an anchor bolt locking force testing mechanism according to this utility model. Figure 3 .

[0017] Figure 4 This is a front view structural schematic diagram of an anchor bolt locking force testing mechanism according to this utility model.

[0018] Figure 5This is a right-side structural schematic diagram of an anchor bolt locking force testing mechanism according to this utility model.

[0019] Figure 6 This is a schematic diagram of the application state structure of an anchor bolt locking force testing mechanism according to this utility model.

[0020] As shown in the figure: 1. Frame structure; 2. Hydraulic loading system; 3. Anchor bolt clamping device; 4. Force sensor; 5. Displacement sensor; 6. Anchor bolt body; 7. Tunnel wall; 101. Base; 102. Support leg; 103. Adjustable fixing seat; 104. Screw; 105. Internal threaded pipe; 106. Fixed base; 201. Hydraulic cylinder; 202. Piston rod; 301. Sleeve; 302. Fastening bolt; 303. V-shaped clamp; 304. Guide rod; 305. Anti-slip teeth. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] Combined with appendix Figure 1 To be continued Figure 6An anchor bolt locking force testing mechanism includes a frame structure 1, which consists of a base 101, a support leg 102, and an adjustable fixing seat 103 located at the end of the support leg. A hydraulic loading system 2 is fixedly mounted on the base 101. The hydraulic loading system 2 includes a hydraulic cylinder 201 and a piston rod 202. An anchor bolt clamping device 3 is fixedly mounted at the end of the piston rod 202. The anchor bolt clamping device 3 includes a sleeve 301 fixedly mounted at the end of the piston rod 202. At least two sets of fastening bolts 302 are threadedly connected to the side of the sleeve 301. A V-shaped clamping plate 303 is rotatably mounted at one end of the fastening bolts 302 that extends into the sleeve 301. A guide rod 304 is fixedly mounted on the side of the V-shaped clamping plate 303 and is movably connected to the side wall of the sleeve 301. A force sensor 4 is embedded between the connecting end faces of the sleeve 301 and the piston rod 202. A displacement sensor 5 is fixedly mounted on the inner side of the support leg 102, with its measuring head pointing towards the side wall of the sleeve 301.

[0025] The adjustable fixing seat 103 includes a lead screw 104 fixedly disposed at the end of the support leg 102. The other end of the lead screw 104 is threadedly connected to an internally threaded tube 105. The other end of the internally threaded tube 105 is rotatably connected to a fixing base 106. The fixing base 106 is fixed to the roadway wall by expansion bolts. The adjustable fixing seat 103 can adapt to roadway walls with different inclination angles by adjusting its length and make the stroke direction of the piston rod 202 coincide with the axis of the anchor rod.

[0026] The inner wall of the V-shaped clamping plate 303 is fixed with anti-slip teeth 305 for locking the tail end of the anchor rod. The force sensor 4 is a spoke-type pressure sensor, and its signal line is connected to an external data acquisition instrument. The displacement sensor 5 is a laser displacement meter.

[0027] The working principle of this utility model is as follows: First, the equipment is installed and debugged. The frame structure 1 is placed near the anchor rod to be tested. According to the inclination angle of the tunnel wall, the internal thread tube 105 in the adjustable fixing seat 103 is rotated. Through the thread transmission between the screw 104 and the internal thread tube 105, the length of the adjustable fixing seat 103 is adjusted so that the fixing base 106 can fit against the tunnel wall. Then, the fixing base 106 is fixed to the tunnel wall with expansion bolts to ensure that the frame structure 1 is installed stably, while ensuring that the stroke direction of the piston rod 202 coincides with the axis of the anchor rod.

[0028] After installation, the hydraulic cylinder 201 is activated to push the piston rod 202 toward the tail end of the anchor rod, so that it is inserted into the sleeve 301 of the anchor rod clamping device 3. The fastening bolt 302 is tightened, and the fastening bolt 302 pushes the V-shaped clamping plate 303 to move toward the anchor rod. Since the guide rod 304 on the side of the V-shaped clamping plate 303 is inserted and connected to the side wall of the sleeve 301, the V-shaped clamping plate 303 moves smoothly. Finally, the anti-slip teeth 305 on the inner wall of the V-shaped clamping plate 303 tightly bite the tail end of the anchor rod, thus achieving a firm clamping of the anchor rod.

[0029] The test begins with the activation of the hydraulic loading system 2. The hydraulic cylinder 201 retracts the piston rod 202, causing the anchor clamping device 3 to apply tension to the anchor rod for a pull-out test. During this process, the force sensor 4 detects the tension transmitted to the anchor rod by the piston rod 202 in real time and converts the force signal into an electrical signal, which is then transmitted to an external data acquisition device. Simultaneously, the displacement sensor 5 on the inner side of the support leg 102, with its measuring head aligned with the side wall of the sleeve 301, monitors the displacement of the anchor rod under tension in real time and transmits the displacement data to the external data acquisition device. The operator acquires force and displacement data through the external data acquisition device, analyzes the data changes, and continues until the anchor rod reaches its limit, completing the anchor rod locking force test and accurately evaluating the anchor rod's support performance.

[0030] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An anchor bolt locking force testing mechanism, comprising a frame structure (1), the frame structure (1) consisting of a base (101), a support leg (102), and an adjustable fixing seat (103) disposed at the end of the support leg, characterized in that: A hydraulic loading system (2) is fixedly provided on the base (101). The hydraulic loading system (2) includes a hydraulic cylinder (201) and a piston rod (202). An anchor clamping device (3) is fixedly provided at the end of the piston rod (202). The adjustable fixing seat (103) includes a screw rod (104) fixedly installed at the end of the support leg (102). The other end of the screw rod (104) is threadedly connected to an internal threaded tube (105). The other end of the internal threaded tube (105) is rotatably connected to a fixing base (106). The fixing base (106) is fixed to the roadway wall by expansion bolts. The adjustable fixing seat (103) can adapt to roadway walls with different inclination angles by adjusting its length and make the stroke direction of the piston rod (202) coincide with the axis of the anchor rod. A force sensor (4) is embedded between the connecting end face of the sleeve (301) and the piston rod (202); a displacement sensor (5) is fixedly provided on the inner side of the support leg (102) with its measuring head pointing towards the side wall of the sleeve (301).

2. The anchor bolt locking force testing mechanism according to claim 1, characterized in that: The anchor clamping device (3) includes a sleeve (301) fixedly disposed at the end of the piston rod (202). At least two sets of fastening bolts (302) are threadedly connected to the side of the sleeve (301). A V-shaped clamping plate (303) is rotatably disposed at one end of the fastening bolt (302) that extends into the sleeve (301). A guide rod (304) that is inserted and connected to the side wall of the sleeve (301) is fixedly disposed on the side of the V-shaped clamping plate (303).

3. The anchor bolt locking force testing mechanism according to claim 2, characterized in that: The inner wall of the V-shaped clamp (303) is fixed with anti-slip teeth (305) for locking the tail end of the anchor rod.

4. The anchor bolt locking force testing mechanism according to claim 1, characterized in that: The force sensor (4) is a spoke-type pressure sensor, and its signal line is connected to an external data acquisition instrument.

5. The anchor bolt locking force testing mechanism according to claim 1, characterized in that: The displacement sensor (5) is a laser displacement meter.

Images