Pre-tightening torque test clamping device suitable for anchor rods with different thicknesses

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By designing a preload torque test clamping device suitable for anchor rods of different thicknesses, the problems of the existing technology, such as the single structure of the operating tool, limited scope of application, complicated operating steps, and low test efficiency, are solved, efficient and flexible test operations are achieved, and safety is improved.

CN223354054UActive Publication Date: 2025-09-19YANKUANG ENERGY GRP CO LTD

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Patent Information

Application Number: CN202422667581.6
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-11-01
Publication Date: 2025-09-19
Estimated Expiration: 2034-11-01

AI Technical Summary

Technical Problem

In the prior art, anchor bolt preload torque test operation tools have a single structure, limited scope of application, complicated operation steps, low test efficiency, and potential safety hazards when conducting tests in areas with impact hazards.

Method used

A clamping device suitable for preload torque testing of anchor rods of varying thicknesses has been designed. The device comprises a clamping assembly and an adjustment member. The adjustment member adjusts the clamping range of the clamping assembly, enabling the device to clamp anchor rods of varying thicknesses. The device can be passed directly through the lashing wire for direct clamping testing, without removing the lashing wire.

Benefits of technology

It improves the flexibility and efficiency of the test, simplifies the operating steps, reduces the test time, avoids safety hazards, and eliminates the need for frequent tool changes or equipment adjustments.

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Abstract

The utility model provides a pre-tightening torque test clamping device suitable for anchor rods with different thicknesses, which comprises a clamping assembly, the clamping assembly comprises a clamping plate and a fixing block, one end of the clamping plate is provided with a first U-shaped groove so as to clamp an anchor rod with a larger diameter, the other end of the clamping plate is fixedly connected with the fixing block, a torque wrench is connected with the fixing block, and the torque wrench is connected with the clamping assembly. A pre-tightening torque is applied; the adjusting piece is detachably arranged on the clamping plate, and a second U-shaped groove is formed in the adjusting piece; when the diameter of the anchor rod is small, the adjusting piece is installed in the first U-shaped groove, the anchor rod is clamped in the second U-shaped groove, and the clamping device can clamp the anchor rods with different thicknesses by installing or detaching the adjusting piece. The clamping device suitable for the pre-tightening torque test of the anchor rods with different thicknesses solves the technical problems of single structure, tedious operation steps and low test efficiency of an operation tool for the pre-tightening torque test of the anchor rods on a driving working face in the prior art.

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Description

Technical Field

[0001] The utility model relates to the technical field of mining anchor pre-tightening torque test devices, in particular to a pre-tightening torque test clamping device suitable for anchors of different thicknesses. Background Art

[0002] Mine anchors are commonly used support equipment in coal mining projects. The size of their preload torque is directly related to the support effect and safety. Therefore, after the support is completed, the anchor bolts need to be preloaded. The preload torque test uses a preset torque wrench. Before use, it is necessary to process a sleeve of the corresponding size according to the thickness of the anchor bolt, insert it into the wrench square tenon, and then insert the sleeve into the anchor bolt cap for testing. The scope of use is extremely limited. In addition, according to industry regulations, anchor bolts constructed in areas with impact hazards must be tied to prevent collapse. During the test, the binding wires must be disassembled or cut, which wastes time, poses safety hazards, and causes material loss.

[0003] Therefore, the prior art needs to be further developed. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a pre-tightening torque test clamping device suitable for anchor rods of different thicknesses, so as to solve the technical problems in the related technology of the pre-tightening torque test operating tool of the excavation working face anchor rod single structure, cumbersome operating steps and low test efficiency.

[0005] In order to achieve the above technical objectives, the utility model adopts the following technical solutions: a pre-tightening torque test clamping device suitable for anchor rods of different thicknesses is provided, including: a clamping assembly, the clamping assembly includes a clamping plate and a fixed block, one end of the clamping plate is provided with a first U-shaped groove to facilitate clamping anchor rods with larger diameters, the other end of the clamping plate is fixedly connected to the fixed block, and a torque wrench is connected to the fixed block to apply a pre-tightening torque; an adjusting piece, the adjusting piece is detachably arranged on the clamping plate, and a second U-shaped groove is provided on the adjusting piece; when the diameter of the anchor rod is small, the adjusting piece is installed in the first U-shaped groove, and the anchor rod is clamped in the second U-shaped groove. By installing or disassembling the adjusting piece, the clamping device can clamp anchor rods of different thicknesses.

[0006] Furthermore, a first groove is provided on the clamping plate, the first groove is provided around the first U-shaped groove, the adjusting member is an adjusting plate, the second U-shaped groove is provided on the adjusting plate, the adjusting plate is inserted into the first groove, so that the adjusting member is connected to the clamping assembly.

[0007] Furthermore, the adjusting member is a U-shaped block, and a second groove is provided on the U-shaped block. The second groove is provided along the outer circumference of the U-shaped block so that the clamping plate is clamped in the second groove.

[0008] Furthermore, the clamping device also includes two fasteners, which pass through the U-shaped block and are connected to the clamping plate to reinforce the connection between the adjustment member and the clamping assembly.

[0009] Furthermore, ears are provided on both sides of the U-shaped clamping block, and each fastener is provided corresponding to each ear, and the fastener passes through the ear and is connected to the clamping plate.

[0010] Furthermore, the fastener is threadedly connected to the clamping plate.

[0011] Furthermore, a first connecting hole is provided on the fixing block, and the tenon on the torque wrench is inserted into the first connecting hole to connect the torque wrench to the clamping device.

[0012] Furthermore, the clamping device also includes a connecting piece, which is detachably arranged on the fixed block, and a second connecting hole is provided on the connecting piece. The aperture of the second connecting hole is smaller than the aperture of the first connecting hole. When the tenon on the torque wrench is small, the connecting piece is installed in the first connecting hole so that the tenon on the torque wrench is inserted into the second connecting hole.

[0013] Furthermore, the first connecting hole is a square hole, and the connecting piece is a square structure.

[0014] Furthermore, the clamping assembly, the adjusting member and the connecting member are all made of metal.

[0015] Beneficial effects:

[0016] 1. The clamping device of this utility model adjusts the clamping range of the first U-shaped groove on the clamping assembly through an adjustment member, enabling the device to clamp anchor rods of varying thicknesses. This solves the problem of the existing technology's single operating tool structure and limited applicability. When conducting preload torque tests, there is no need to prepare sleeves of different sizes for anchor rods of different thicknesses, improving test flexibility and efficiency.

[0017] 2. Since the clamping device of the utility model can adapt to anchor rods of different sizes, there is no need to frequently change tools or adjust equipment when conducting preload torque tests, thereby simplifying the operating steps, reducing test time, and improving test efficiency.

[0018] 3. When anchor bolting is performed in areas with impact hazards, anti-collapse lashing is often required. Traditional preload torque testing requires removing or cutting the lashing wire, which is not only time-consuming but also poses a safety hazard. However, the clamping device of the present invention allows direct clamping of the anchor bolt without removing the lashing wire, further simplifying the operation and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the clamping device used in the first embodiment of the present utility model;

[0020] Figure 2 This is a schematic structural diagram of the clamping device used in the second embodiment of the present utility model;

[0021] Figure 3 It is a structural schematic diagram of the clamping device adopted in the third embodiment of the present utility model.

[0022] The above drawings include the following reference numerals:

[0023] 1. Clamping assembly; 11. Clamping plate; 12. Fixing block; 121. First connecting hole; 13. First U-shaped groove; 2. Adjusting member; 21. Second U-shaped groove; 22. Adjusting plate; 23. U-shaped clamping block; 231. Ear; 3. Fastener; 4. Connecting member; 41. Second connecting hole. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0025] According to the embodiment of the present invention, a preload torque test clamping device suitable for anchor rods of different thicknesses is provided. Figures 1 to 3, including: a clamping assembly 1, the clamping assembly 1 includes a clamping plate 11 and a fixed block 12, one end of the clamping plate 11 is provided with a first U-shaped groove 13 to facilitate clamping of anchor rods with larger diameters, the other end of the clamping plate 11 is connected to the fixed block 12, and the torque wrench is connected to the fixed block 12 to apply a pre-tightening torque; an adjusting member 2, the adjusting member 2 is detachably provided on the clamping plate 11, and a second U-shaped groove 21 is provided on the adjusting member 2; when the diameter of the anchor rod is small, the adjusting member 2 is installed in the first U-shaped groove 13, and the anchor rod is clamped in the second U-shaped groove 21. By installing or removing the adjusting member 2, the clamping device can clamp anchor rods of different thicknesses. The first U-shaped groove 13 of the clamping plate 11 is used to clamp the anchor rod (actually, it is used to clamp the nut on the anchor rod, and the thickness of the anchor rod determines the thickness of the nut). When the anchor rod is relatively thick, there is no need to use the adjusting member 2. The first U-shaped groove 13 of the clamping plate 11 can be aligned with the anchor rod and clamped directly. The fixing block 12 at the other end is connected to the torque wrench to apply a pre-tightening torque to the anchor rod and perform a pre-tightening torque test. When the anchor rod is relatively thin, the adjusting member 2 is installed in the first U-shaped groove 13, and the thin anchor rod is clamped with the second U-shaped groove 21 of the adjusting member 2, and then a pre-tightening torque test is performed on it. By designing an adjustable clamping assembly 1 and adjusting member 2, it is possible to flexibly adapt to anchor rods of different thicknesses. This means that when performing a pre-tightening torque test, there is no need to prepare a specific clamping tool for each size of anchor rod, which greatly improves the versatility and applicability of the tool. When carrying out anchor rod construction in areas with impact hazards, anti-collapse binding is usually required. Traditional pre-tightening torque tests require disassembling or cutting the binding wire, which not only wastes time but also poses a safety hazard. The clamping device of this embodiment bypasses the binding wires and allows for direct clamping testing of anchor rods, eliminating the need to remove the binding wires. This further simplifies the operation steps and improves work efficiency. This clamping device, suitable for anchor rods of varying thicknesses, solves the technical issues of prior art in tunneling face anchor rod preload torque testing, which suffer from a single structure, cumbersome operation steps, and low test efficiency.

[0026] See Figure 1 The present embodiment is a clamping device for preload torque testing suitable for anchor rods of different thicknesses. A first groove is provided on the clamping plate 11. The first groove is provided around the first U-shaped groove 13. The adjusting member 2 is an adjusting plate 22. The second U-shaped groove 21 is provided on the adjusting plate 22. The adjusting plate 22 is inserted into the first groove to connect the adjusting member 2 to the clamping assembly 1. The clamping plate 11 has a certain thickness. The first groove is recessed inward along the edge of the first U-shaped groove 13 of the clamping plate 11. The adjusting plate 22 is inserted into the first groove to form a tight connection with the clamping plate 11, preventing the anchor rod from loosening or falling off during the test. The adjusting plate 22 can be easily inserted into or removed from the first groove, thereby improving work efficiency and reducing operational difficulty.

[0027] See Figure 2This embodiment of the clamping device for preload torque testing is suitable for anchor rods of varying thicknesses. The adjusting member 2 is a U-shaped block 23, which is provided with a second groove. The second groove is arranged along the outer circumference of the U-shaped block 23, allowing the clamping plate 11 to engage within the second groove. The outer side of the U-shaped block 23 is provided with an inwardly recessed second groove, into which the U-shaped edge of the clamping plate 11 engages. This allows workers to quickly adjust and replace the clamping device, improving work efficiency. The insertion and removal process of the U-shaped block 23 is relatively simple, requiring no complex tools or steps.

[0028] See Figure 2 and Figure 3 This embodiment of the clamping device for preload torque testing of anchor rods of varying thicknesses also includes two fasteners 3, which pass through a U-shaped block 23 and connect to the clamping plate 11 to reinforce the connection between the adjusting member 2 and the clamping assembly 1. The use of fasteners 3 significantly enhances the connection strength between the U-shaped block 23 and the clamping plate 11, making the clamping device more stable overall.

[0029] See Figure 3 This embodiment of the clamping device for preload torque testing is suitable for anchor rods of varying thicknesses. Ears 231 are provided on both sides of the U-shaped block 23. Each fastener 3 is provided corresponding to an ear 231. The fastener 3 passes through the ear 231 and connects to the clamping plate 11. The ear 231 provides a secure connection point for the fastener 3, further strengthening the connection between the U-shaped block 23 and the clamping plate 11.

[0030] The clamping device of the present embodiment is suitable for pre-tightening torque testing of anchor rods of different thicknesses. The fastener 3 is threadedly connected to the clamping plate 11 for easy assembly and disassembly.

[0031] See Figure 1 This embodiment of the preload torque test clamping device is suitable for anchor rods of varying thicknesses. The fixing block 12 is provided with a first connection hole 121, into which the tenon on the torque wrench is inserted to connect the torque wrench to the clamping device. By directly inserting the tenon on the torque wrench into the first connection hole 121, the connection between the torque wrench and the clamping device can be quickly established.

[0032] See Figure 2 and Figure 3This embodiment is suitable for a preload torque test clamping device for anchor rods of varying thicknesses. The clamping device further includes a connector 4, which is detachably mounted on the fixing block 12. The connector 4 is provided with a second connection hole 41, the diameter of which is smaller than that of the first connection hole 121. When the tenon on the torque wrench is relatively small, the connector 4 is installed in the first connection hole 121 so that the tenon on the torque wrench is inserted into the second connection hole 41. By providing the detachable connector 4 and the second connection hole 41, the clamping device can adapt to torque wrench tenons of different sizes.

[0033] See Figure 2 and Figure 3 This embodiment of the preload torque test clamping device is suitable for anchor rods of varying thicknesses. The first connecting hole 121 is a square hole, and the connecting member 4 is a cube. The square hole and the cube-shaped connecting member 4 form a tighter fit. Compared to circular holes and other irregularly shaped holes, the square hole is less likely to rotate or slip when subjected to force.

[0034] The first connecting hole 121 may also be configured as a tooth-shaped structure. Correspondingly, the outer periphery of the connecting member 4 is also designed as a matching tooth-shaped structure, which will not rotate or move when subjected to force.

[0035] This embodiment of the clamping device for preload torque testing of anchor rods of varying thicknesses features a clamping assembly 1, adjustment member 2, and connector 4 all constructed from metal. The clamping plate 11 and fixing block 12 on the clamping assembly 1 are integrally formed, enhancing the strength of the clamping assembly 1. The metal material ensures the clamping device remains stable during preload torque application, resisting deformation or damage and thus extending the device's service life.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0038] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0039] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0040] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A preload torque test clamping device suitable for anchor rods of different thicknesses, characterized in that: include: A clamping assembly (1), the clamping assembly (1) comprising a clamping plate (11) and a fixing block (12), one end of the clamping plate (11) being provided with a first U-shaped groove (13) for facilitating clamping of an anchor rod with a larger diameter, the other end of the clamping plate (11) being fixedly connected to the fixing block (12), and a torque wrench being connected to the fixing block (12) for applying a pre-tightening torque; An adjusting member (2) is detachably arranged on the clamping plate (11), and a second U-shaped groove (21) is provided on the adjusting member (2); when the diameter of the anchor rod is small, the adjusting member (2) is installed in the first U-shaped groove (13), and the anchor rod is clamped in the second U-shaped groove (21); by installing or removing the adjusting member (2), the clamping device can clamp anchor rods of different thicknesses.

2. The preload torque test clamping device suitable for anchor rods of different thicknesses according to claim 1 is characterized in that: The clamping plate (11) is provided with a first groove, the first groove being provided around the first U-shaped groove (13), the adjusting member (2) being an adjusting plate (22), the second U-shaped groove (21) being provided on the adjusting plate (22), the adjusting plate (22) being inserted into the first groove, so that the adjusting member (2) is connected to the clamping assembly (1).

3. The preload torque test clamping device suitable for anchor rods of different thicknesses according to claim 1 is characterized in that: The adjusting member (2) is a U-shaped clamping block (23), and a second groove is provided on the U-shaped clamping block (23). The second groove is provided along the outer periphery of the U-shaped clamping block (23), so that the clamping plate (11) is clamped in the second groove.

4. The preload torque test clamping device suitable for anchor rods of different thicknesses according to claim 3 is characterized in that: The clamping device further comprises two fasteners (3), which pass through the U-shaped clamping block (23) and are connected to the clamping plate (11) to reinforce the connection between the adjusting member (2) and the clamping assembly (1).

5. The preload torque test clamping device applicable to anchor rods of different thicknesses according to claim 4, characterized in that: Ears (231) are provided on both sides of the U-shaped clamping block (23), and each fastener (3) is provided corresponding to each ear (231). The fastener (3) passes through the ear (231) and is connected to the clamping plate (11).

6. The preload torque test clamping device applicable to anchor rods of different thicknesses according to claim 5, characterized in that: The fastener (3) is threadedly connected to the clamping plate (11).

7. The preload torque test clamping device applicable to anchor rods of different thicknesses according to claim 1 is characterized in that: A first connecting hole (121) is provided on the fixing block (12), and the tenon on the torque wrench is inserted into the first connecting hole (121) so that the torque wrench is connected to the clamping device.

8. The preload torque test clamping device applicable to anchor rods of different thicknesses according to claim 7, characterized in that: The clamping device further comprises a connecting member (4), the connecting member (4) being detachably arranged on the fixing block (12), the connecting member (4) being provided with a second connecting hole (41), the aperture of the second connecting hole (41) being smaller than the aperture of the first connecting hole (121), and when the tenon on the torque wrench is smaller, the connecting member (4) is installed in the first connecting hole (121) so that the tenon on the torque wrench is inserted into the second connecting hole (41).

9. The preload torque test clamping device suitable for anchor rods of different thicknesses according to claim 8, wherein the first connecting hole (121) is a square hole, and the connecting member (4) is a cube structure.

10. The preload torque test clamping device applicable to anchor rods of different thicknesses according to claim 8, characterized in that: The clamping assembly (1), the adjusting member (2) and the connecting member (4) are all made of metal.