Water expansion type anchor rod pull-out test tool

Abstract

The utility model discloses a water expansion type anchor rod pull-out test tool, relates to the technical field of anchor rod pull-out tests, and provides a pull-out force through a telescopic cylinder to carry out a pull-out test. The device comprises an anchor rod bushing, a support, a tray and a connecting disc, the anchor rod lining is fixedly connected with the water injection end of the water expansion type anchor rod, and an annular brim is arranged at the bottom of a lining body of the anchor rod lining. A stepped hole is formed in the center of the tray, and a pull ring capable of being clamped at the bottom of an annular brim of the anchor rod bushing is arranged in the stepped hole; a connecting disc which is correspondingly connected with the telescopic end of the telescopic cylinder in a fastening manner is arranged above the tray; the connecting disc is correspondingly connected with the tray through a connecting rod; a support for supporting the telescopic cylinder is arranged outside the tray; during a pull-out test, the pull ring acts on the bottom of the annular brim of the anchor rod bushing to apply axial pulling force to the anchor rod bushing, and no radial acting force is applied to the anchor rod, so that the anchor rod is prevented from generating radial deformation in the pull-out test process.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt pull - out tests, and particularly relates to a water - swelling bolt pull - out test tooling. Background Art

[0002] During the construction of water - swelling bolts, first, the water - swelling bolt is placed into the rock formation hole, and the water - swelling bolt is injected with water. The rod body of the water - swelling bolt expands during the water injection process. After expansion, the rod body of the water - swelling bolt contacts the inner wall of the rock formation hole, generating frictional force. In order to verify whether the actual anchoring force of the water - swelling bolt meets the design requirements to ensure the safety and stability of the structure, it is necessary to conduct a pull - out test on the water - swelling bolt.

[0003] Chinese Patent (Publication No.: CN115597974A) discloses a bolt pull - out instrument. The structure of this patent includes a reaction frame, a jack, a conversion piece, and an anchor ring. The anchor ring includes a body and clamping pieces. A through - hole is formed in the body, and at least a part of the clamping piece is fitted in the through - hole. When conducting a pull - out test, the bolt is clamped by the axial movement of the clamping piece. However, it is found in actual use that due to the relatively thin wall thickness of the rod body of the water - swelling bolt, when the clamping piece clamps the rod body of the water - swelling bolt for the pull - out test, the clamping piece exerts a large radial force on the rod body of the water - swelling bolt, resulting in radial deformation of the rod body of the water - swelling bolt and even being unable to clamp the water - swelling bolt, leading to the inability to conduct the pull - out test. Summary of the Utility Model

[0004] In order to overcome the deficiencies in the background art, the utility model discloses a water - swelling bolt pull - out test tooling.

[0005] To achieve the above - mentioned invention purpose, the utility model adopts the following technical solutions:

[0006] A water - swelling bolt pull - out test tooling provides a pull - out force through a telescopic cylinder for the pull - out test. It includes a bolt bushing, a support, a tray, and a connection plate. The bolt bushing is fixedly connected to the water - injection end of the water - swelling bolt. An annular brim is provided at the bottom of the sleeve body of the bolt bushing. A stepped hole is provided at the center position of the tray, and a pull - ring capable of being stuck at the bottom of the annular brim of the bolt bushing is provided in the stepped hole. Above the tray, a connection plate corresponding to the telescopic end of the telescopic cylinder is fixedly connected. The connection plate is correspondingly connected to the tray through a connecting rod. A support for supporting the telescopic cylinder is provided outside the tray.

[0007] Preferably, the outer circle of the pull - ring is in a conical structure.

[0008] Preferably, the pull - ring is composed of two half - rings; or the pull - ring is a multi - petal structure capable of surrounding the bolt bushing for one week.

[0009] Preferably, a cover plate for preventing the pull ring from disengaging from the stepped hole of the tray is provided on the top of the tray. A through hole through which the connecting rod can move through is provided at a position on the cover plate corresponding to the connecting rod. A compression nut for pressing the cover plate is threadedly connected to the connecting rod at a position corresponding to the cover plate.

[0010] Preferably, a through hole through which the connecting rod can move through is provided at a position on the connecting disk corresponding to the connecting rod. A nut is threadedly connected to one end of the connecting rod passing through the connecting disk.

[0011] Preferably, a limiting step for limiting the nut is provided at one end of the connecting rod passing through the connecting disk.

[0012] Preferably, the support is of a cylindrical structure, and an opening for installing the nut is provided on the cylindrical wall of the support at a position corresponding to the connecting rod.

[0013] Due to the adoption of the above - mentioned technical solution, the utility model has the following beneficial effects:

[0014] A water - swelling type anchor rod pulling test tooling disclosed by the utility model has a simple structure, is easy to assemble, and has a relatively low production cost; the anchor rod bushing is firmly connected to the water - swelling type anchor rod injection end. A pull ring capable of being stuck at the bottom of the annular cap edge of the anchor rod bushing is provided at the center position of the tray. During the pulling test, the pull ring acts on the bottom of the annular cap edge of the anchor rod bushing, applying an axial pulling force to the anchor rod bushing and having no radial acting force on the anchor rod, preventing the anchor rod from generating radial deformation during the pulling test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three - dimensional structural schematic diagram of the utility model;

[0016] Figure 2 is a structural schematic diagram of the utility model;

[0017] Figure 3 is a structural schematic diagram of the connection state between the tray and the anchor rod bushing;

[0018] Figure 4 is a top view of the tray.

[0019] In the figure: 1. Anchor rod bushing; 2. Telescopic cylinder; 3. Support; 4. Tray; 5. Connecting disk; 6. Pull ring; 7. Connecting rod; 8. Cover plate; 9. Compression nut; 10. Nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0021] Embodiment 1, in combination with Figures 1 - 2 4. A water-expandable anchor pull-out test tool, which provides a pull-out force through a telescopic cylinder 2 for a pull-out test; it comprises an anchor bushing 1, a support 3, a tray 4 and a connecting plate 5; the anchor bushing 1 is tightly connected to the water injection end of the water-expandable anchor, and an annular brim is provided at the bottom of the anchor bushing 1; a step hole is provided at the center of the tray 4, and a pull ring 6 that can be clamped at the bottom of the annular brim of the anchor bushing 1 is provided in the step hole, that is, during the pull-out test, the pull ring 6 acts on the bottom of the annular brim of the anchor bushing 1, applies axial tension to the anchor bushing 1, and has no radial force on the anchor, thereby preventing the anchor from generating radial deformation during the pull-out test;

[0022] A connecting plate 5 is provided above the tray 4 and is fastened to the telescopic end of the telescopic cylinder 2. The connecting plate 5 is connected to the tray 4 via a connecting rod 7. A support 3 is provided outside the tray 4 for providing support for the telescopic cylinder 2. That is, when performing a pulling test, the connecting plate 5 is pulled by the telescopic cylinder 2, and the connecting plate 5 pulls the tray 4 via the connecting rod 7. The tray 4 pulls the pull ring 6 to apply an axial pulling force to the anchor bushing 1.

[0023] When in use, firstly, a tray 4 is arranged outside the anchor bushing 1, so that the pull ring 6 is in the step hole of the tray 4, and the pull ring 6 is in contact with the bottom of the annular cap edge of the anchor bushing 1; water is injected into the water-expandable anchor to expand the anchor; after water injection, a support 3 is arranged outside the tray 4, and the connecting plate 5 is connected to the tray 4 correspondingly through the connecting rod 7, and then the telescopic cylinder 2 can be opened to apply axial pulling force to the anchor bushing 1, and a pulling test is performed on the anchor bushing 1.

[0024] It should be noted that the pull ring 6 is composed of two half rings; or the pull ring 6 is a multi-petal structure that can surround the anchor bushing 1 for a week, as shown in the attached Figure 4 As shown, the pull ring 6 can be conveniently placed in the step hole of the tray 4, and can also be conveniently removed after the pull-out test is completed; the outer circle of the pull ring 6 is a conical structure, which can further facilitate the removal of the pull ring 6 after the pull-out test is completed.

[0025] Embodiment 2: In actual use, it is found that during the process of injecting water into the water-expandable anchor rod, the anchor rod will expand circumferentially, and occasionally the pull ring 6 will be pushed out of the step hole of the tray 4. In order to solve this technical problem, this embodiment is further improved;

[0026] Combined with the attached Figure 3 , a water-swelling type anchor rod pulling test tooling, which is different from that of Embodiment 1 in that on the basis of Embodiment 1, a cover plate 8 for preventing the pull ring 6 from coming out of the stepped hole of the tray 4 is provided on the top of the tray 4. A through hole through which the connecting rod 7 can move through is provided at the position of the cover plate 8 corresponding to the connecting rod 7. A pressing nut 9 for pressing the cover plate 8 is threadedly connected to the connecting rod 7 at the position corresponding to the cover plate 8. That is, before injecting water into the water-swelling type anchor rod, the cover plate 8 is first installed on the top of the tray 4, and the cover plate 8 is pressed by the pressing nut 9. The cover plate 8 effectively limits the pull ring 6, thereby effectively preventing the phenomenon that the pull ring 6 is pushed out of the stepped hole of the tray 4 during the process of injecting water into the water-swelling type anchor rod.

[0027] Embodiment 3, combined with the attached Figures 1 - 3 , a water-swelling type anchor rod pulling test tooling, on the basis of Embodiment 1 or 2, a through hole through which the connecting rod 7 can move through is provided at the position of the connecting plate 5 corresponding to the connecting rod 7. A nut 10 is threadedly connected to one end of the connecting rod 7 passing through the connecting plate 5. The structure is simple and can facilitate the corresponding connection of the connecting plate 5 and the tray 4;

[0028] It should be noted that a limiting step for limiting the nut 10 is provided at one end of the connecting rod 7 passing through the connecting plate 5, that is, the position of the nut 10 can be limited by the limiting step, so as to effectively ensure that the rod bodies of the connecting rods 7 between the connecting plate 5 and the tray 4 are of equal length, thereby effectively avoiding the problem of eccentric loading during the pulling test;

[0029] As shown in the attached Figure 1 , the support 3 is of a cylindrical structure, and an opening for installing the nut 10 is provided on the cylindrical wall of the support 3 corresponding to the connecting rod 7. The support 3 can provide support for the telescopic cylinder 2 and does not affect the connection operation between the connecting plate 5 and the tray 4.

[0030] The parts not detailed in the present utility model are the prior art. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model; therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and are intended to include all changes falling within the meaning and scope of the equivalent elements in the present utility model.

Claims

1. A water expansion anchor rod pull-out test tool, which uses a telescopic cylinder (2) to provide a pull-out force for a pull-out test; the features are: The invention comprises an anchor bushing (1), a support (3), a tray (4) and a connecting plate (5); the anchor bushing (1) is tightly connected to the water injection end of the water-expandable anchor, and the bottom of the anchor bushing (1) is provided with an annular brim; a step hole is provided at the center of the tray (4), and a pull ring (6) is provided in the step hole and can be clamped in the bottom of the annular brim of the anchor bushing (1); a connecting plate (5) is provided above the tray (4) and is tightly connected to the telescopic end of the telescopic cylinder (2), and the connecting plate (5) is connected to the tray (4) via a connecting rod (7); and a support (3) is provided outside the tray (4) for providing support for the telescopic cylinder (2).

2. The water expansion anchor pull-out test tool as claimed in claim 1, characterized in that: The outer circle of the pull ring (6) is a conical structure.

3. The water expansion anchor pull-out test tool as claimed in claim 1 or 2, characterized in that: The pull ring (6) is composed of two half rings; or the pull ring (6) is a multi-petal structure capable of surrounding the anchor bushing (1).

4. The water expansion anchor pull-out test tool as claimed in claim 2, characterized in that: The top of the tray (4) is provided with a cover plate (8) for preventing the pull ring (6) from falling out of the step hole of the tray (4); a through hole is provided on the surface of the cover plate (8) at a position corresponding to the connecting rod (7) so that the connecting rod (7) can movably pass through; and a clamping nut (9) for clamping the cover plate (8) is threadedly connected at a position corresponding to the cover plate (8).

5. The water expansion anchor pull-out test tool as claimed in claim 1, characterized in that: A through hole is provided at a position of the connection disk (5) corresponding to the connection rod (7) through which the connection rod (7) can movably pass, and a nut (10) is threadedly connected to one end of the connection rod (7) that passes through the connection disk (5).

6. The water expansion anchor pull-out test tool as claimed in claim 5, characterized in that: One end of the connecting rod (7) passing through the connecting plate (5) is provided with a limiting step for limiting the nut (10).

7. The water expansion anchor pull-out test tool as claimed in claim 5, characterized in that: The support (3) is in a cylindrical structure, and an opening for installing a nut (10) is provided at a position of the cylindrical wall corresponding to the connecting rod (7).

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