Limiting plate for improving accuracy of anchor cable dynamometer

Abstract

The utility model discloses a limiting plate for improving the accuracy of an anchor cable dynamometer, which comprises a body, a movable block, an anchor cable drill hole, a clamping piece and an angle adjusting assembly, and the middle of the body is provided with a through hole with internal threads; the movable block is in threaded connection with the through hole; the anchor cable drill hole penetrates through the movable block in the axial direction of the movable block. The clamping pieces are four shape memory alloy clamping pieces, and the clamping pieces are matched with an anchor cable drill hole; the six angle adjusting assemblies are evenly arranged on the outer circumference of the through hole in the body. By arranging the movable block, the depth of the limiting groove between the movable block and the through hole of the body is adjustable, so that the clamping piece is prevented from being jacked into the tool anchor, and the value measurement accuracy of the dynamometer is improved; by arranging the six micro hydraulic cylinders and the pressure sensors, the extension height of the hydraulic cylinders can be adjusted according to pressure distribution, so that the axis of the anchor cable is ensured to coincide with the center of the dynamometer, the mounting precision of the limiting plate is improved, and the problem of unbalanced moment caused by eccentricity of the anchor cable is also solved.

Description

Technical Field

[0001] This utility model belongs to the field of geotechnical engineering technology, specifically relating to a limiting plate for improving the accuracy of anchor cable force gauges. Background Technology

[0002] Anchor cables, as a common support structure, are widely used in engineering construction fields such as slope protection, foundation pit construction, and tunnel construction. Their working principle mainly involves inserting multiple strands of twisted steel wire into a borehole, with the bottom end fixed to a stable part deep within the landslide mass and the top fixed to the outside of the rock and soil mass. The shear and tensile strength of the steel wire prevents displacement of the landslide mass. Anchor cables are anchoring systems that transfer tensile force to stable rock or soil layers.

[0003] In existing construction techniques, a separate limiting plate needs to be installed before anchor cable installation. However, existing limiting plates present the following problems: 1. The limiting groove of the limiting plate is too shallow, which may cause the clamping piece to be pushed into the tool anchor, resulting in inaccurate force gauge readings. 2. The installation angle of the limiting plate is difficult to adjust, affecting installation accuracy. 3. Uneven preload distribution due to uneven rock mass or torque imbalance caused by anchor cable eccentricity. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a limiting plate for improving the accuracy of anchor cable force gauges.

[0005] This utility model discloses a limiting plate for improving the accuracy of an anchor cable force gauge, comprising: a body, which is cylindrical and has a through hole with internal threads in the middle; a movable block, which is disposed in the through hole of the body and is connected to the through hole by threads; an anchor cable drill hole, which is disposed through the movable block along the axial direction of the movable block; four clamping pieces, which are four shape memory alloy clamping pieces that cooperate with the anchor cable drill hole; and six angle adjustment components, which are evenly disposed on the outer circumference of the through hole in the body.

[0006] The movable block is cylindrical, and its length is less than that of the main body. A limiting groove is formed between the end face of the movable block and the through hole of the main body. The outer surface of the movable block has an external thread, which mates with the internal thread of the through hole in the main body.

[0007] The movable block has multiple anchor cable boreholes, which are funnel-shaped guide channels. The inner diameter of the anchor cable boreholes gradually decreases from the inlet section to the outlet section.

[0008] The angle adjustment component is located on one end of the main body near the outlet section of the anchor cable borehole.

[0009] The inner wall of the anchor cable borehole is inlaid with a polymer wear-resistant bushing, specifically a polyetheretherketone wear-resistant bushing, and the inner surface of the bushing is etched with micron-level grooves.

[0010] The grooves store grease.

[0011] The four shape memory alloy clips of the clip also form a trumpet-shaped guide channel, and the clip can be inserted into the anchor cable drill hole. The inner wall of the clip is engraved with spiral patterns.

[0012] The angle adjustment component includes a hexagonal receiving groove, a pressure sensor is installed at the bottom of the receiving groove, and a miniature telescopic rod or a miniature hydraulic cylinder is installed above the pressure sensor.

[0013] The ends of the miniature telescopic rods or miniature hydraulic cylinders are all equipped with top plates, and the pressure sensors and miniature telescopic rods or miniature hydraulic cylinders are all connected to the controller.

[0014] The angle adjustment assembly also includes a hydraulic cylinder circuit, and six miniature hydraulic cylinders are all connected to the hydraulic cylinder circuit. The six miniature hydraulic cylinders are connected to form a unit through the hydraulic cylinder circuit.

[0015] The beneficial effects of this utility model are as follows: by setting a movable block, the depth of the limiting groove between the movable block and the through hole of the main body is adjustable, thereby preventing the clamping plate from being pushed into the tool anchor and improving the accuracy of the force gauge measurement; by setting six miniature hydraulic cylinders and pressure sensors, the extension height of the hydraulic cylinders can be adjusted according to the pressure distribution, thereby ensuring that the anchor cable axis coincides with the center of the force gauge, improving the installation accuracy of the limiting plate, and also solving the problem of torque imbalance caused by anchor cable eccentricity; by setting shape memory alloy clamping plates, the clamping plates remain open (hole diameter enlarged by 2mm) at room temperature, and when the anchor cable is tensioned and the temperature exceeds 35℃, the clamping plates automatically retract and tighten the anchor cable, compensating for the preload loss caused by thermal expansion. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the limiting plate of this utility model used to improve the accuracy of anchor cable force gauges.

[0017] Figure 2 This is a schematic diagram of the movable block after the mounting clip of this utility model is installed.

[0018] Figure 3 This is the front view of this utility model.

[0019] Figure 4 yes Figure 3 A sectional view along the AA direction.

[0020] Figure 5 This is a schematic diagram of the angle adjustment component of this utility model.

[0021] Figure 6 This is a schematic diagram of the movable block of this utility model without the clamping piece installed.

[0022] Figure 7 This is a cross-sectional view of the body of the present invention without the clip installed.

[0023] Figure 8 This is a schematic diagram of the hydraulic cylinder oil circuit of this utility model.

[0024] Figure 9 This is a schematic diagram of the clip structure of this utility model.

[0025] Figure label:

[0026] Body 1; movable block 2; anchor cable drill hole 3; limiting groove 4; angle adjustment assembly 5; pressure sensor 501; miniature hydraulic cylinder 502; hydraulic cylinder oil circuit 503; clamping plate 6. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] like Figures 1-9 As shown, the limiting plate of this utility model for improving the accuracy of anchor cable force gauge includes: a body 1, a movable block 2, an anchor cable drill hole 3, a clamping plate 6, and an angle adjustment component 5. The body 1 is cylindrical, and a through hole with internal threads is opened in the middle of the body 1. The movable block 2 is set in the through hole of the body 1. The movable block 2 is cylindrical, and the length of the movable block 2 is less than the length of the body 1. The movable block 2 is connected to the through hole by threads, specifically, the outer surface of the movable block 2 has external threads, and the external threads of the movable block 2 cooperate with the internal threads of the through hole in the body 1. Therefore, the movable block 2 can move back and forth along the axial direction of the body 1.

[0029] As the movable block 2 moves along the through hole, a limiting groove 4 is formed between the end face of one end of the movable block 2 and the through hole of the body 1. By moving the movable block 2, the depth of the limiting groove 4 can be adjusted, thereby solving the problem in the prior art that the limiting groove of the limiting plate is too shallow, which may cause the clamping piece to be pushed into the tool anchor, making the force gauge measurement inaccurate.

[0030] Multiple anchor cable holes 3 are provided in the movable block 2, and the anchor cable holes 3 are arranged to penetrate the movable block 2 along the axial direction of the movable block 2; for example Figure 7 As shown, the anchor cable borehole 3 is a funnel-shaped guide channel. The inner diameter of the anchor cable borehole 3 gradually decreases from the inlet section to the outlet section, which can reduce the frictional resistance when the anchor cable is inserted.

[0031] The inner wall of the anchor cable borehole 3 is inlaid with a high-polymer wear-resistant bushing, specifically a polyetheretherketone (PEEK) wear-resistant bushing, and the inner surface of the bushing is etched with micron-level grooves. The grooves store lubricating grease, which can reduce friction.

[0032] Anchor cable borehole 3 can be used to place clips 6, which are four shape memory alloy clips, such as... Figure 4 As shown, the clip 6 is matched with the anchor cable drill hole 3, that is, the cross-section of the four clips 6 is all arc-shaped, and the four shape memory alloy clips of the clip 6 also form a trumpet-shaped guide channel. The outer diameter of the entrance section of the clip 6 is larger than the inner diameter of the entrance section of the anchor cable drill hole 3, and the clip 6 can be inserted into the anchor cable drill hole 3. The inner wall of the clip 6 is engraved with spiral patterns.

[0033] The shape memory alloy clips are made of nickel-titanium alloy with a phase transformation temperature of 35℃. At room temperature, the clips remain open (with the aperture enlarged by 2mm). When the anchor cable is tensioned and the temperature exceeds 35℃, the clips automatically contract to tighten the anchor cable, compensating for the loss of preload caused by thermal expansion.

[0034] There are six angle adjustment components 5, which are evenly distributed around the outer circumference of the through hole in the body 1. The angle adjustment components 5 are located on the body 1 near the exit section of the anchor cable drill hole.

[0035] The angle adjustment assembly 5 includes a hexagonal receiving groove, a pressure sensor 501, and a miniature telescopic rod or miniature hydraulic cylinder 502. The pressure sensor 501 is installed at the bottom of the receiving groove, and the miniature telescopic rod or miniature hydraulic cylinder 502 is installed above the pressure sensor 502. A top plate is installed at the end of each miniature telescopic rod or miniature hydraulic cylinder.

[0036] When the container contains miniature hydraulic cylinders, all six miniature hydraulic cylinders 502 are connected to the hydraulic cylinder oil circuit 5053, and the six miniature hydraulic cylinders 502 are connected to form a unit through the hydraulic cylinder oil circuit 503.

[0037] The miniature telescopic rod is an electric push rod, and the pressure sensor 501 and the miniature telescopic rod or miniature hydraulic cylinder 502 are both connected to the controller.

[0038] In practical use, the pressure distribution can be obtained from the pressure sensor 501, and the extension height of the miniature telescopic rod or miniature hydraulic cylinder 502 can be adjusted according to the pressure distribution to ensure that the anchor cable axis coincides with the center of the force gauge, improve the installation accuracy of the limit plate, and also solve the problem of torque imbalance caused by anchor cable eccentricity.

[0039] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A limit plate for improving the accuracy of an anchor load cell, characterized in that, include: The main body is cylindrical, and a through hole with internal threads is opened in the middle of the main body; A movable block is disposed in a through hole of the body, and the movable block is connected to the through hole by a thread; Anchor cable drilling, wherein the anchor cable drilling is provided to penetrate the movable block along the axial direction of the movable block; The clips consist of four shape memory alloy clips that mate with the anchor cable boreholes. An angle adjustment assembly, comprising six components, which are evenly distributed around the outer circumference of the through hole in the body.

2. The limiting plate for improving the accuracy of anchor cable force gauges according to claim 1, characterized in that, The movable block is cylindrical, and its length is less than that of the main body. A limiting groove is formed between the end face of the movable block and the through hole of the main body. The outer surface of the movable block has an external thread, and the external thread of the movable block is engaged with the internal thread of the through hole in the main body.

3. The limit plate for improving the accuracy of an anchor load cell according to claim 1, wherein, The movable block has multiple anchor cable boreholes, which are funnel-shaped guide channels. The inner diameter of the anchor cable boreholes gradually decreases from the inlet section to the outlet section.

4. The limit plate for improving the accuracy of an anchor load cell according to claim 3, wherein, The angle adjustment component is located on one end of the main body near the outlet section of the anchor cable borehole.

5. The limiting plate for improving the accuracy of an anchor cable dynamometer according to claim 3, characterized in that, The inner wall of the anchor cable borehole is inlaid with a polymer wear-resistant bushing, specifically a polyetheretherketone wear-resistant bushing, and the inner surface of the bushing is etched with micron-level grooves.

6. The limit plate for improving the accuracy of an anchor load cell according to claim 5, wherein, The grooves store grease.

7. The limiting plate for improving the accuracy of an anchor cable dynamometer according to claim 3, characterized in that, The four shape memory alloy clips of the clip also form a trumpet-shaped guide channel, and the clip can be inserted into the anchor cable drill hole. The inner wall of the clip is engraved with spiral patterns.

8. The limiting plate for improving the accuracy of an anchor cable force gauge according to claim 1, characterized in that, The angle adjustment component includes a hexagonal receiving groove, a pressure sensor is installed at the bottom of the receiving groove, and a miniature telescopic rod or a miniature hydraulic cylinder is installed above the pressure sensor.

9. The limit plate for improving the accuracy of an anchor load cell according to claim 8, wherein, The ends of the miniature telescopic rods or miniature hydraulic cylinders are all equipped with top plates, and the pressure sensors and miniature telescopic rods or miniature hydraulic cylinders are all connected to the controller.

10. The limit plate for improving the accuracy of an anchor load cell according to claim 8, wherein, The angle adjustment assembly also includes a hydraulic cylinder circuit, and six miniature hydraulic cylinders are all connected to the hydraulic cylinder circuit. The six miniature hydraulic cylinders are connected to form a unit through the hydraulic cylinder circuit.

Images