A static load testing device for multi-size extruded anchor steel strands

Abstract

The utility model discloses a kind of extruded anchor steel strand static load testing devices for multiple sizes, including test carrier, the inside upper end of test carrier is equipped with limiting slot, the inside of limiting slot is equipped with through-hole, the inside bottom of limiting slot is equipped with locating groove two, and locating groove two has certain depth, the inside of locating groove two is correspondingly matched with limiting disc one, the device adopts nested double limiting disc structure, and realizes quick modularization combination by the hierarchical cooperation of locating groove.Extruded anchor of different diameters can be accurately fixed by only flexibly selecting and matching limiting disc combination, without replacing the whole carrier, and the differentiated design of hole diameter further expands the adaptation range, significantly reduces the preparation time before test, solves the pain point that traditional device needs to frequently adjust carrier due to the size difference of anchor body, and significantly improves the versatility and operation efficiency of multi-specification steel strand static load test.

Description

Technical Field

[0001] This utility model relates to the field of extrusion anchor technology, and in particular to a static load testing device for extrusion anchor strands of various sizes. Background Technology

[0002] Extruded anchor strands are a key component in prestressed concrete structures, composed of multiple high-strength steel wires twisted together and securely anchored at the ends using specialized extrusion anchors. The core technology involves using hydraulic equipment to extrude the anchor sleeve, ensuring a tight grip with the steel strand and achieving high-strength bond strength. This technology significantly improves anchor reliability, can withstand enormous tensile forces, and effectively prevents slippage. It is primarily used in bridges, long-span buildings, and geotechnical anchoring projects, offering advantages such as fatigue resistance, corrosion resistance, and ease of construction, making it particularly suitable for scenarios requiring post-tensioning prestressing. The sealing performance of the extruded anchor head can be further enhanced by grouting, making it an important anchoring method in modern prestressed systems.

[0003] Existing extrusion anchor strand testing devices have significant drawbacks: First, the carrier structure is simple and can only be adapted to extrusion anchors of specific sizes. When dealing with anchors of different diameters, it is necessary to frequently change or customize special carriers, which is cumbersome and costly. Second, traditional carriers rely on simple planar contact or shallow groove fit to limit the anchor body. During high-pressure tensile testing, radial slippage or axial movement between the anchor body and the carrier can easily occur, leading to distorted test data. Utility Model Content

[0004] The purpose of this invention is to provide a static load testing device for extruded anchor strands of various sizes, which solves the problems of existing extruded anchor strand testing devices having a single carrier structure, only suitable for extruded anchors of specific sizes, and requiring frequent replacement or customization of special carriers when dealing with anchors of different diameters, resulting in cumbersome operation and high costs.

[0005] To achieve the above objectives, a static load testing device for extruded anchor steel strands of various sizes is provided, including a test carrier. A limiting groove is provided on the upper inner side of the test carrier. A through hole is provided inside the limiting groove. A positioning groove two is provided on the bottom inner side of the limiting groove. The positioning groove two has a certain depth. A limiting plate one is correspondingly fitted inside the positioning groove two. The top of the first limiting plate is also provided with a positioning groove, and the inside of the positioning groove is correspondingly fitted with a second limiting plate. Both the first limiting plate and the second limiting plate have through holes, and the diameter of the hole inside the first limiting plate is larger than that of the hole inside the second limiting plate.

[0006] According to the static load test device for extruded anchor steel strands of various sizes, the steel strand body is penetrated through the interior of both the first limiting plate and the second limiting plate.

[0007] According to the described static load testing device for multi-size extruded anchor steel strands, an extruded anchor is installed at one end of the steel strand body.

[0008] According to the aforementioned static load testing device for multi-size extruded anchor strands, a limiting plate is installed at the opening end of the limiting groove of the test carriage.

[0009] According to the aforementioned static load testing device for multi-size extruded anchor strands, both ends of the limiting plate and the test carrier are threaded with positioning bolts.

[0010] According to the aforementioned static load testing device for multi-size extruded anchor strands, a screw is threadedly fitted to the upper middle part of the limiting plate, and a positioning block is fixedly connected to the inner end of the screw.

[0011] The above-mentioned solution has the following beneficial effects: 1. This device adopts a nested double-limiting disc structure, which enables rapid modular assembly through the hierarchical cooperation of positioning slots. Extrusion anchors of different diameters can be accurately fixed by flexibly selecting the combination of limiting discs, without the need to replace the entire carrier. Its differentiated opening diameter design further expands the adaptability range, significantly reduces the preparation time before the test, and solves the pain point of traditional devices that require frequent carrier adjustments due to differences in anchor body size. It significantly improves the versatility and operational efficiency of static load testing of multi-specification steel strands.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the overall structure of a static load testing device for extruded anchor strands of various sizes according to the present invention. Figure 2 This is a top view of a static load testing device for multi-size extruded anchor strands according to the present invention; Figure 3 This is a side view of a static load testing device for extruded anchor strands of various sizes according to the present invention.

[0014] Legend: 1. Test vehicle; 2. Limiting plate; 3. Positioning bolt; 4. Screw; 5. Limiting disc one; 6. Limiting disc two; 7. Steel strand body; 8. Extrusion anchor; 9. Positioning groove one; 10. Positioning groove two; 11. Through hole; 12. Positioning block; 13. Limiting groove. Detailed Implementation

[0015] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0016] Reference Figure 1-3 This utility model provides a static load testing device for extruded anchor steel strands of various sizes, including a test carrier 1. A limiting groove 13 is formed on the upper inner side of the test carrier 1. A through hole 11 is formed inside the limiting groove 13. A positioning groove 2 10 is formed on the bottom inner side of the limiting groove 13. The positioning groove 2 10 has a certain depth. A limiting plate 1 5 is correspondingly fitted inside the positioning groove 2 10. The through hole 11 ensures that the steel strand can pass through the entire test carrier, which is convenient for fixing the lower end of the steel strand during subsequent tensile testing, so as to test the strength of the extruded anchor. The positioning groove 2 10 can correspond to the limiting plate 1 5. The positioning groove 2 10 has a certain depth and can have a certain limiting ability after installation. The top of the limiting plate 15 is also provided with a positioning groove 19, and the interior of the positioning groove 19 is correspondingly fitted with a limiting plate 26. Both the limiting plate 15 and the limiting plate 26 have through holes, and the opening inside the limiting plate 15 is larger in diameter than the opening inside the limiting plate 26. The corresponding positioning groove 19 and the limiting plate 26 can be quickly installed, and the two limiting plates can be used to fit extrusion anchors 7 of different diameters, improving the applicability of the device. Both the first limiting plate 5 and the second limiting plate 6 have steel strand bodies 7 running through their interiors. An extrusion anchor 8 is installed at one end of the steel strand body 7. A limiting plate 2 is installed at the opening end of the limiting groove 13 of the test carriage 1. Positioning bolts 3 are threaded onto both ends of the limiting plate 2 and onto the test carriage 1. A screw 4 is threaded onto the upper middle part of the limiting plate 2. A positioning block 12 is fixedly connected to the inner end of the screw 4. By setting the limiting plate 2, the opening end of the test carriage 1 can be sealed, and during subsequent installation of the test carriage 1... The cooperation between the screw 4 and the positioning block 12 can enhance the locking effect. The mounting groove of the tensioning device also has the same groove as the test vehicle, and it has its own clamping mechanism to achieve the purpose of locking and improve its stability. The tensioning machine applies axial tension to the test vehicle, and the force flows through the limiting plate and is vertically transmitted to the extrusion anchor, so that the steel strand is in a pure tensile state under the rigid guidance of the bushing. The amount of anchor slippage is recorded in real time until failure, ensuring that the load is not disturbed by the side throughout the process, and accurately reflecting the performance of the extrusion anchor under real axial static load.

[0017] Working principle: In use, firstly, select a suitable limiting plate according to the size of the extrusion anchor 8. When the extrusion anchor 8 can be used in conjunction with the limiting plate 5, first install the limiting plate 5 in the positioning groove 10 inside the limiting groove 13. Then, pass the steel strand body 7 at the lower end of the extrusion anchor 8 through the opening inside the limiting plate 5 and the through hole 11 inside the test carrier 1, so that the bottom of the extrusion anchor 8 contacts the top of the limiting plate 5, thereby restricting it. When the diameter of the extrusion anchor 8 is smaller than the opening inside the limiting plate 5, the operator can then install the limiting plate 6 in the positioning groove 9 inside the limiting plate 5, thereby ensuring that the entire test device can be matched with extrusion anchors 8 of different sizes to restrict them and improve the stability of the extrusion anchor steel strand during static load testing.

[0018] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A static load testing device for multi-size extruded anchor strands, comprising a test carrier (1), characterized in that, The test vehicle (1) has a limiting groove (13) on its inner upper end. A through hole (11) is provided inside the limiting groove (13). A positioning groove (10) is provided at the bottom of the inner side of the limiting groove (13). The positioning groove (10) has a certain depth. The positioning groove (10) is fitted with a limiting disk (5). The top of the first limiting plate (5) is also provided with a positioning groove (9), and the inside of the positioning groove (9) is correspondingly matched with the second limiting plate (6). Both the first limiting plate (5) and the second limiting plate (6) have through holes, and the diameter of the hole inside the first limiting plate (5) is larger than that of the hole inside the second limiting plate (6).

2. The static load testing device for multi-size extruded anchor strands according to claim 1, characterized in that, Both the first limiting plate (5) and the second limiting plate (6) have steel strand bodies (7) running through their interiors.

3. The static load testing device for multi-size extruded anchor strands according to claim 2, characterized in that, An extrusion anchor (8) is installed at one end of the steel strand body (7).

4. The static load testing device for multi-size extruded anchor strands according to claim 1, characterized in that, A limiting plate (2) is installed at the opening end of the limiting groove (13) of the test vehicle (1).

5. The static load testing device for multi-size extruded anchor strands according to claim 4, characterized in that, Both ends of the limiting plate (2) and the test vehicle (1) are threaded with positioning bolts (3).

6. The static load testing device for multi-size extruded anchor strands according to claim 4, characterized in that, The upper middle part of the limiting plate (2) is threaded with a screw (4), and the inner end of the screw (4) is fixedly connected to a positioning block (12).

Images