A device for anchor cable pull-out test and anchor withdrawal

Abstract

The present application belongs to the technical field of anchor cable pulling equipment. Disclosed is a device for anchor cable pulling test and anchor withdrawal, comprising: an anchor ring for the anchor cable to pass through and one end to contact with surrounding rock, a first clamping piece movably arranged in the anchor ring along the extension direction of the anchor cable, the first clamping piece being switchable between an unlocked state and a locked state; a fixed sleeve, one end of which is replaceably connected with a pulling assembly and an anchor withdrawal assembly, the pulling assembly comprising a locking plate connected with the other end of the anchor ring, the locking plate being provided with an elastic member in contact with one end of the first clamping piece; and a hydraulic assembly connected with the other end of the fixed sleeve. The present application can realize the locking and fixing of the anchor cable when the hydraulic assembly retracts and the first clamping piece cooperates with the anchor ring during the anchor cable pulling test, avoiding the retraction of the pulled anchor cable. Meanwhile, the structure can replace the pulling assembly with the anchor withdrawal assembly, realizing the withdrawal of the large-deformation uplift-resistance shear anchor cable and expanding the application range thereof.

Description

Technical Field

[0001] This invention belongs to the technical field of anchor cable pull-out equipment, and particularly relates to a device for anchor cable pull-out testing and anchor removal. Background Technology

[0002] Anchor cable support is a very common support technology used in coal mine roadway support, especially for roofs with high surrounding rock stress and thick soft rock layers. By using long anchor cables, unstable rock layers are anchored into deep, hard, and stable rock masses, resulting in significant support effects. In this process, testing the anchoring force of the anchor cables is one of the important measures to ensure the quality of the support.

[0003] Due to the inherent characteristics of anchor cables, anchor force testing presents significant challenges. Firstly, anchor cables exhibit large tensile deformation. For example, taking a 10m long anchor cable with a maximum total elongation of 5%, under favorable construction conditions, the tensile deformation reaches 500mm to achieve maximum anchor force, exceeding the maximum stroke of the hydraulic cylinder in current anchor cable pull-out instruments. Secondly, anchor cables experience significant elastic recoil. Existing anchor cable pull-out instruments often reset the hydraulic cylinder after reaching its maximum stroke by returning oil, raising the reaction frame between the cylinder and the anchor cable tray to continue tensioning. However, during the hydraulic cylinder's return stroke, the anchor cable also undergoes elastic recoil, almost equal to the initial stretch before oil return, making it extremely difficult to obtain the maximum anchor force.

[0004] Furthermore, existing anchor cable testing devices only have the function of anchor cable pull-out testing and lack the function of unanchoring anchor cables under large deformation conditions in actual working conditions. For example, for patent number ZL202011324781.1, entitled "A Large Deformation Increased Resistance Shear Anchor Cable", ordinary anchor unanchoring instruments cannot complete the unanchoring work, resulting in a limited scope of application. Therefore, a device for anchor cable pull-out testing and unanchoring is provided to solve the above problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes a device for anchor cable pull-out testing and anchor retraction. During anchor cable pull-out testing, when the hydraulic assembly's telescopic end returns oil, the first clamping plate, in conjunction with the anchor ring, can lock and fix the anchor cable, preventing pull-out retraction. Furthermore, this structure can be modified by replacing the pull-out assembly with an anchor retraction assembly to retract anchor cables subjected to large deformation and increased resistance shear, thus expanding its applicability.

[0006] To achieve the above objectives, the present invention provides a device for anchor cable pull-out testing and anchor retraction, comprising:

[0007] An anchor ring is used for the anchor cable to pass through and one end of the anchor cable to contact the surrounding rock. The anchor ring is provided with a first clamp that can move along the extension direction of the anchor cable. The first clamp can switch between an unlocked state and a locked state.

[0008] The fixed sleeve has a pull-out assembly or a retraction assembly replaceably connected to one end near the anchor ring. The pull-out assembly includes a locking plate connected to the other end of the anchor ring, and the locking plate is provided with an elastic element that contacts one end of the first clamping piece.

[0009] A hydraulic assembly is connected to the other end of the fixed sleeve. The telescopic end is located inside the fixed sleeve and fixed to the anchor cable. In the unlocked state, the telescopic end of the hydraulic assembly pulls the anchor cable. In the locked state, the telescopic end of the hydraulic assembly returns oil, and the anchor ring can move towards the locking plate. The first clamping piece fixes the anchor cable through the elastic element.

[0010] Furthermore, it also includes multiple extension sleeves connected end to end in sequence, with one end of the extension sleeve near the locking plate being detachably connected to the locking plate, and one end of the extension sleeve near the fixed sleeve being detachably connected to the fixed sleeve.

[0011] Furthermore, the anchor removal assembly is an anchor removal sleeve, one end of which is detachably connected to the fixed sleeve, and the other end of which contacts the anchor ring.

[0012] Furthermore, the extension sleeve includes a pair of first arc-shaped plates, which are joined and fixed together to form the extension sleeve.

[0013] The anchor removal assembly includes a pair of second arc-shaped plates, which are joined and fixed together to form the anchor removal assembly.

[0014] Furthermore, the anchor ring has a first frustum-shaped groove at one end near the locking plate. The inner diameter of the first frustum-shaped groove away from the locking plate is smaller than the inner diameter of the first frustum-shaped groove near the locking plate. The first clamping piece is located in the first frustum-shaped groove, and the outer wall of the first clamping piece matches the inner wall of the first frustum-shaped groove.

[0015] Furthermore, the locking plate includes: a plate body;

[0016] A limiting sleeve is fixed to one end of the plate body near the anchor ring, and the end of the anchor ring extends into the limiting sleeve and is slidably connected to the limiting sleeve.

[0017] A receiving cavity is formed on the plate body, and the elastic element is located inside the receiving cavity.

[0018] Furthermore, the elastic element is a first spring with one end fixed to the locking plate, and the other end of the first spring contacts the end of the first clip.

[0019] Furthermore, the hydraulic assembly includes: a drive element, fixed to one end of the fixed sleeve and having a telescopic end;

[0020] A connector is disposed inside the fixed sleeve and fixed on the telescopic end, and the connector is fixed to the anchor cable.

[0021] Furthermore, the connecting member includes: a clamping ring, on one end near the driving member, a second frustum-shaped groove is provided, the inner diameter of the end face of the second frustum-shaped groove away from the driving member is smaller than the inner diameter of the end face of the second frustum-shaped groove near the driving member, and a second spring is provided in the second frustum-shaped groove;

[0022] The second clamping piece is disposed in the second frustum-shaped groove and located at the end of the second spring away from the driving member. One end of the second spring is in contact with the second clamping piece. The anchor cable passes through the second clamping piece, and the second clamping piece is fixed to the anchor cable by the second spring.

[0023] The pull rod has a sleeve end that is threadedly connected to the outer wall of the clamping ring, the other end of the second spring is fixed to the inner wall of the sleeve end, and the other end of the pull rod is connected to the driving member.

[0024] Furthermore, the driving component includes: a hydraulic cylinder fixed to one end of the fixed sleeve, the pull rod passing through the hydraulic cylinder, and the hydraulic cylinder being throttle-connected to the pull rod;

[0025] An oil pump is connected to the hydraulic cylinder via an oil pipe.

[0026] Compared with the prior art, the present invention has the following advantages and technical effects:

[0027] 1. A first clamp is installed on the anchor ring. During the pull-out test, when the hydraulic component returns oil at the telescopic end, the anchor ring moves relative to the locking plate. The elastic element drives the first clamp to fix the anchor cable and prevent the anchor cable from retracting.

[0028] 2. Replace the pull-out assembly on the fixed sleeve with the anchor release assembly. The anchor release assembly can be used to release the anchor cable under large deformation and resistance shearing conditions in actual working conditions, thereby increasing the applicability of the device. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 This is a structural diagram showing the connection between the drawing assembly and the fixed sleeve;

[0031] Figure 2 A schematic diagram showing the connection relationship between the anchor release assembly and the fixing sleeve;

[0032] Figure 3 A schematic diagram of the structure in use of the pull-out assembly;

[0033] Figure 4 A structural diagram showing the anchor removal component in use;

[0034] Among them, 1-locking plate, 2-extending sleeve, 3-clamping ring, 4-fixing sleeve, 5-pull rod, 6-hydraulic cylinder, 7-limit nut, 8-oil pump, 9-oil pipe, 10-second spring, 11-second washer, 12-second clamping plate, 13-first spring, 14-first washer, 15-anchoring sleeve, 16-first clamping plate, 17-anchor cable, 18-surrounding rock, 19-anchor cable tray, 20-anchor ring. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figures 1-4 The present invention provides a device for anchor cable pull-out test and anchor release, comprising: an anchor ring 20 for the anchor cable 17 to pass through and one end to contact the surrounding rock 18, and a first clamping piece 16 that can move along the extension direction of the anchor cable 17 is provided inside the anchor ring 20, and the first clamping piece 16 can switch between an unlocked state and a locked state.

[0038] The anchor ring 20 is provided with a movable first clamping piece 16. When the first clamping piece 16 moves with the anchor ring 20, it is squeezed by the elastic element and contracts within the anchor ring 20 to clamp and fix the anchor cable 17.

[0039] Specifically, the first clip 16 is a conical ring structure fitted onto the anchor cable 17. It has a certain degree of rigidity and can shrink inward under external pressure to fix the anchor cable 17.

[0040] Furthermore, an anchor cable tray 19 is fixed to one end of the anchor ring 20 near the surrounding rock 18. The anchor cable tray 19 contacts the surrounding rock 18 to increase the contact area between the anchor ring 20 and the surrounding rock 18.

[0041] The fixed sleeve 4 has a replaceable pull-out assembly or a retraction assembly at one end near the anchor ring 20. The pull-out assembly includes a locking plate 1 connected to the other end of the anchor ring 20. The locking plate 1 is provided with an elastic element that contacts one end of the first clamping piece 16.

[0042] Specifically, one end of the fixed sleeve 4 is connected to the hydraulic assembly, and the other end is detachably connected to the pull-out assembly and the anchor release assembly. That is, during the pull-out test, the locking plate 1 of the pull-out assembly is connected to the fixed sleeve 4, and the locking plate 1, together with the elastic element, realizes the automatic locking of the anchor cable 17. During the actual working condition anchor release, the anchor release assembly is connected to the fixed sleeve 4, and the anchor release assembly can be used to release the anchor cable 17.

[0043] The hydraulic assembly is connected to the other end of the fixed sleeve 4. The telescopic end is located inside the fixed sleeve 4 and fixed to the anchor cable 17. In the unlocked state, the telescopic end of the hydraulic assembly pulls the anchor cable 17. In the locked state, the telescopic end of the hydraulic assembly returns oil, and the anchor ring 20 can move towards the locking plate 1. The first clamp 16 fixes the anchor cable 17 through the elastic element.

[0044] The hydraulic component provides the pulling force. During the pull-out test, in the unlocked state, the hydraulic component pulls the anchor cable 17, and the anchor cable tray 19 and anchor ring 20 move towards the surrounding rock 18 or have a tendency to move towards the surrounding rock 18. At this time, the compressive force of the elastic element on the first clamping plate 16 is small, the first clamping plate 16 expands, and the anchor cable 17 can be pulled out normally. When the extension end of the hydraulic component reaches its maximum stroke, the anchor cable 17 elastically retracts at the moment the oil return begins, and the anchor ring 20 moves away from the surrounding rock 18 or has a tendency to move away from the surrounding rock 18. The elastic element is further compressed, and the feedback to the first clamping plate 16 causes the first clamping plate 16 to be compressed and contracted, thus fixing the anchor cable 17.

[0045] Further optimize the plan, referring to Figure 1 , Figure 3 It also includes multiple extension sleeves 2 connected end to end in sequence. One end of the extension sleeve 2 near the locking plate 1 is detachably connected to the locking plate 1, and the other end of the extension sleeve 2 near the fixed sleeve 4 is detachably connected to the fixed sleeve 4.

[0046] Specifically, the locking plate 1 is connected to the fixed sleeve 4 through the extension sleeve 2. Multiple extension sleeves 2 work together to lengthen the overall structure. That is, when conducting a pull-out test, the number of extension sleeves 2 is selected according to the actual test conditions, thereby adjusting the distance between the locking plate 1 and the fixed sleeve 4.

[0047] In addition, during the pull-out test, after the hydraulic component returns oil to its original position during the pull-out test, an additional extension sleeve 2 can be added to the extension sleeve 2 on the fixed sleeve 4. Then, tighten the limit nut 7 and carry out the next cycle of pull-out test until the maximum anchoring force of the anchor cable 17 is obtained.

[0048] Further optimize the plan, referring to Figure 2 , Figure 4 The anchor removal assembly is an anchor removal sleeve 15. One end of the anchor removal sleeve 15 is detachably connected to the fixed sleeve 4, and the other end of the anchor removal sleeve 15 is in contact with the anchor ring 20.

[0049] Specifically, the anchor release sleeve 15 is detachably connected to the end face of the fixed sleeve 4 by bolts. When the anchor release operation is performed, the anchor release sleeve 15 is inserted into the borehole and contacts the end face of the anchor ring 20. It moves towards the surrounding rock 18 through the telescopic end of the hydraulic component to realize the anchor release operation.

[0050] When the anchor cable 17 is unanchored, the exposed section of the anchor cable 17 passes through the unanchoring sleeve 15 and is fixed to the hydraulic assembly.

[0051] As the coal face advances, the roof anchoring force in the goaf area roadway remains unreleased, which can easily cause a large area of ​​overhang at the end of the working face, leading to stress concentration at the end and gas accumulation, posing a significant safety hazard. Therefore, it is necessary to release the roof in a timely manner to reduce the controlled roof area and reduce gas accumulation. Thus, it is necessary to perform anchor removal operation. Conventional anchor removal devices are not suitable for large deformation anchor cables 17. However, by installing an anchor removal sleeve 15 on the fixed sleeve 4, which is equivalent to extending the length of the fixed sleeve 4, it can be used for anchor removal operation of large deformation anchor cables 17.

[0052] Further optimize the plan, referring to Figure 1 , Figure 2 The extension sleeve 2 includes a pair of first arc-shaped plates, which are joined and fixed together to form the extension sleeve 2; the anchor removal assembly includes a pair of second arc-shaped plates, which are joined and fixed together to form the anchor removal assembly.

[0053] Specifically, the extension sleeve 2 is a pair of first arc-shaped plates that can be assembled and disassembled. When installing the extension sleeve 2, it is only necessary to place the first arc-shaped plates on both sides of the anchor cable 17 and assemble them.

[0054] The anchor release sleeve 15 is a pair of second arc-shaped plates that can be assembled and disassembled. When installing the anchor release sleeve 15, it is only necessary to place the second arc-shaped plates on both sides of the anchor cable 17 and assemble them.

[0055] In one specific embodiment of the present invention, a pair of first arc-shaped plates can be fastened using M8 bolts and nuts, and a pair of second arc-shaped plates can be fastened using M8 bolts and nuts.

[0056] Further optimize the plan, referring to Figure 1 An anchor ring 20 has a first frustum-shaped groove at one end near the locking plate 1. The inner diameter of the first frustum-shaped groove away from the locking plate 1 is smaller than the inner diameter of the first frustum-shaped groove near the locking plate 1. The first clamping piece 16 is located in the first frustum-shaped groove, and the outer wall of the first clamping piece 16 matches the inner wall of the first frustum-shaped groove.

[0057] Specifically, the inner diameters of the two ends of the first frustum-shaped groove inside the anchor ring 20 are different. When the elastic element squeezes the first clamping piece 16, the first clamping piece 16 shrinks to clamp and fix the anchor cable 17 under the shape limitation of the inner wall of the first frustum-shaped groove.

[0058] Further optimize the plan, referring to Figure 1 The locking plate 1 includes: a plate body; a limiting sleeve, fixed to one end of the plate body near the anchor ring 20, the end of the anchor ring 20 extending into the limiting sleeve and slidingly connected to the limiting sleeve; and a receiving cavity, formed on the plate body, with an elastic element located inside the receiving cavity.

[0059] Among them, a limiting sleeve is fixed on the plate body. The limiting sleeve is used to limit the anchor ring 20 and prevent the anchor ring 20 from separating from the locking plate 1. There is a protrusion at the other end of the plate body. The protrusion has an expansion cavity, which is connected to the receiving cavity to cooperate with the receiving cavity opened in the plate body to increase its receiving range.

[0060] Further optimize the plan, referring to Figure 1 The elastic element is a first spring 13 with one end fixed to the locking plate 1, and the other end of the first spring 13 is in contact with the end of the first clip 16.

[0061] The first spring 13 is disposed in the receiving cavity and the growth cavity, with one end fixed to the plate body and the other end connected to the first clamping piece 16.

[0062] Furthermore, it also includes a first washer 14, which is fixed to one end of the first spring 13 near the first clip 16, with the first clip 16 in contact with the end face of the first washer 14.

[0063] Further optimize the plan, referring to Figure 1 , Figure 2 The hydraulic components include: a drive unit, fixed at one end of the fixed sleeve 4 and having a telescopic end; and a connector, disposed inside the fixed sleeve 4 and fixed on the telescopic end, the connector being fixed to the anchor cable 17.

[0064] Further optimize the plan, referring to Figure 1 , Figure 2 The connecting components include: a clamping ring 3, with a second frustum-shaped groove on one end near the driving component, the inner diameter of the end face of the second frustum-shaped groove away from the driving component being smaller than the inner diameter of the end face of the second frustum-shaped groove near the driving component, and a second spring 10 disposed in the second frustum-shaped groove; a second clamping piece 12, disposed in the second frustum-shaped groove and located at the end of the second spring 10 away from the driving component, one end of the second spring 10 contacting the second clamping piece 12, an anchor cable 17 passing through the second clamping piece 12, and the second clamping piece 12 being fixed to the anchor cable 17 by the second spring 10; and a pull rod 5, having a sleeve end that is threadedly connected to the outer wall of the clamping ring 3, the other end of the second spring 10 being fixed to the inner wall of the sleeve end, and the other end of the pull rod 5 being connected to the driving component.

[0065] The fixed sleeve 4 is provided with a clamping ring 3, and the anchor cable 17 passes through the clamping ring 3. A pull rod 5 is threadedly connected to the outer wall of the clamping ring 3. When the sleeve end of the pull rod 5 rotates relative to the clamping ring 3, the distance between the inner wall of the sleeve end and the end of the clamping ring 3 changes, which can compress the second spring 10. After being compressed, the second spring 10 compresses the second clamping piece 12. Due to the existence of the second frustum-shaped groove, the second clamping piece 12 contracts after being compressed, thereby clamping and fixing the anchor cable 17, and thus ensuring the fixation of the anchor cable 17 and the telescopic end of the hydraulic component.

[0066] Furthermore, it also includes a second washer 11, which is fixed to one end of the second spring 10 near the second clip 12, and the second clip 12 contacts the second washer 11.

[0067] Further optimize the plan, referring to Figure 1 , Figure 2 The driving components include: a hydraulic cylinder 6, fixed to one end of a fixed sleeve 4, a pull rod 5 passing through the hydraulic cylinder 6, and the hydraulic cylinder 6 being connected to the pull rod 5 in a transmission manner; and an oil pump 8, connected to the hydraulic cylinder 6 via an oil pipe 9.

[0068] The oil pump 8 supplies oil to the hydraulic cylinder 6 through the oil pipe 9. The hydraulic cylinder 6 drives the pull rod 5 to move within the fixed sleeve 4 to pull out the anchor cable 17.

[0069] Furthermore, a limit nut 7 is provided at the end of the hydraulic cylinder 6 away from the fixed sleeve 4. The limit nut 7 is threaded onto the tie rod 5, and the limit nut 7 cooperates with the hydraulic cylinder 6 to limit the anchor cable 17.

[0070] In one specific embodiment of the present invention, the clamping ring 3 and the pull rod 5 are connected by a trapezoidal thread with a nominal thread diameter of 65 mm and a pitch of 10 mm. The lower end of the pull rod 5 passes sequentially through the fixing sleeve 4, the hydraulic cylinder 6, and the limiting nut 7. The hydraulic cylinder 6 is connected to the oil pump 8 via an oil pipe 9. The pull rod 5 and the limiting nut 7 are connected by a trapezoidal thread with a nominal thread diameter of 40 mm and a pitch of 7 mm.

[0071] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for anchor cable pull-out testing and anchor retraction, characterized in that: include: An anchor ring (20) is used for the anchor cable (17) to pass through and one end to contact the surrounding rock (18). The anchor ring (20) is provided with a first clamp (16) that can move along the extension direction of the anchor cable (17). The first clamp (16) can switch between an unlocked state and a locked state. The fixed sleeve (4) is replaceably connected to a pull-out assembly or an anchor release assembly at one end near the anchor ring (20). The pull-out assembly includes a locking plate (1) connected to the other end of the anchor ring (20). The locking plate (1) is provided with an elastic element that contacts one end of the first clamping piece (16). A hydraulic assembly is connected to the other end of the fixed sleeve (4), with its telescopic end located inside the fixed sleeve (4) and fixed to the anchor cable (17). In the unlocked state, the telescopic end of the hydraulic assembly pulls the anchor cable (17). In the locked state, the telescopic end of the hydraulic assembly returns oil, and the anchor ring (20) can move toward the locking plate (1). The first clamp (16) fixes the anchor cable (17) through the elastic element. The anchor removal assembly is an anchor removal sleeve (15), one end of which is detachably connected to the fixed sleeve (4), and the other end of which is in contact with the anchor ring (20). The anchor ring (20) has a first frustum-shaped groove at one end near the locking plate (1). The inner diameter of the first frustum-shaped groove away from the locking plate (1) is smaller than the inner diameter of the first frustum-shaped groove near the locking plate (1). The first clamping piece (16) is located in the first frustum-shaped groove, and the outer wall of the first clamping piece (16) matches the inner wall of the first frustum-shaped groove. The locking plate (1) includes: a plate body; A limiting sleeve is fixed to one end of the plate body near the anchor ring (20), and the end of the anchor ring (20) extends into the limiting sleeve and is slidably connected to the limiting sleeve. A receiving cavity is formed on the plate body, and the elastic element is located inside the receiving cavity.

2. The device for anchor cable pull-out testing and anchor retraction according to claim 1, characterized in that: It also includes multiple extension sleeves (2) connected end to end in sequence. One end of the extension sleeve (2) near the locking plate (1) is detachably connected to the locking plate (1), and one end of the extension sleeve (2) near the fixed sleeve (4) is detachably connected to the fixed sleeve (4).

3. The device for anchor cable pull-out testing and anchor retraction according to claim 2, characterized in that: The extension sleeve (2) includes a pair of first arc-shaped plates, which are joined and fixed together to form the extension sleeve (2); The anchor removal assembly includes a pair of second arc-shaped plates, which are joined and fixed together to form the anchor removal assembly.

4. The device for anchor cable pull-out testing and anchor retraction according to claim 1, characterized in that: The elastic element is a first spring (13) with one end fixed to the locking plate (1), and the other end of the first spring (13) is in contact with the end of the first clip (16).

5. The device for anchor cable pull-out testing and anchor retraction according to claim 1, characterized in that: The hydraulic assembly includes: a drive element, fixed to one end of the fixed sleeve (4) and having a telescopic end; The connector is disposed inside the fixed sleeve (4) and fixed on the telescopic end, and the connector is fixed to the anchor cable (17).

6. The device for anchor cable pull-out testing and anchor retraction according to claim 5, characterized in that: The connector includes: a clamping ring (3), a second frustum-shaped groove is provided on one end near the driving member, the inner diameter of the end face of the second frustum-shaped groove away from the driving member is smaller than the inner diameter of the end face of the second frustum-shaped groove near the driving member, and a second spring (10) is provided in the second frustum-shaped groove. The second clamping piece (12) is disposed in the second frustum-shaped groove and located at the end of the second spring (10) away from the driving member. One end of the second spring (10) is in contact with the second clamping piece (12). The anchor cable (17) passes through the second clamping piece (12). The second clamping piece (12) is fixed to the anchor cable (17) by the second spring (10). The pull rod (5) has a sleeve end that is threadedly connected to the outer wall of the clamp (3), the other end of the second spring (10) is fixed to the inner wall of the sleeve end, and the other end of the pull rod (5) is connected to the drive member.

7. The device for anchor cable pull-out testing and anchor retraction according to claim 6, characterized in that: The driving component includes: a hydraulic cylinder (6) fixed at one end of the fixed sleeve (4), a pull rod (5) passing through the hydraulic cylinder (6), and the hydraulic cylinder (6) and the pull rod (5) being connected in a transmission manner; The oil pump (8) is connected to the hydraulic cylinder (6) via an oil pipe (9).

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