Anchoring rod connection sleeve

Abstract

The application relates to the field of geotechnical engineering anchoring technology, in particular to an anchor rod connecting sleeve, which comprises a jacking sleeve, the jacking sleeve is a flat-top conical structure, a first connecting channel is arranged in the middle of the jacking sleeve, and a thread is arranged in the inside of the first connecting channel; a front-end anchor rod is fixed in the first connecting channel through the thread; a fixing sleeve is a cylindrical structure, one end of the fixing sleeve is fixedly connected with the base of the jacking sleeve, and a second connecting channel is arranged in the middle of the fixing sleeve; a friction plate is arranged on the fixing sleeve, the friction plate is arranged in a plurality of pieces, the friction plates are arranged in a circumferential interval mode along the fixing sleeve, and the friction plate and the fixing sleeve are connected through an expansion and contraction mechanism; and a rear-end anchor rod is fixed in the second connecting channel through the thread, and the rear-end anchor rod is used for triggering the expansion and contraction mechanism to drive the friction plate to extend out. The application solves the problem that the sleeve has poor adhesion with surrounding rock-soil bodies or slurry, and improves the supporting effect of the anchor rod.

Description

Technical Field

[0001] This application relates to the field of geotechnical engineering anchoring technology, and in particular to an anchor bolt connecting sleeve. Background Technology

[0002] Anchor bolts, due to their high tensile and bending strength, help overcome the disadvantage that the tensile strength of soil and rock is lower than its compressive strength, thereby enhancing the stability of the soil and rock mass. Currently, anchoring systems are widely used in the support of coal mine roadways, tunnels, slopes, and other fields, and are one of the most important components of soil and rock reinforcement systems.

[0003] In projects with limited construction space, such as roadways and tunnels, if the anchor bolts are designed to be long, sleeves are needed to connect multiple anchor bolt sections and install them in sections. Currently, threaded connection sleeves are commonly used, where two anchor bolts are screwed into the sleeve from both ends and fixed by internal threads. However, the outer surface of the sleeve is relatively smooth, resulting in poor adhesion to the surrounding rock, soil, or grout, which in turn affects the support effect of the anchor bolts. Utility Model Content

[0004] This application aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, embodiments of this application provide an anchor bolt connecting sleeve, which solves the problem of poor adhesion between the sleeve and the surrounding soil or grout in the prior art, significantly improving the support effect of the anchor bolt system.

[0005] An anchor bolt connection sleeve, comprising: The jacking sleeve has a flat-top conical structure. A first connecting channel is provided in the middle of the jacking sleeve. The first connecting channel extends along the axial direction of the jacking sleeve and passes through both ends of the jacking sleeve. The interior of the first connecting channel is provided with threads. A front anchor bolt, wherein the front anchor bolt is fixed in the first connecting channel by threads; A fixed sleeve, wherein the fixed sleeve is a cylindrical structure, one end of the fixed sleeve is fixedly connected to the base of the jacking sleeve, and a second connecting channel is provided in the middle of the fixed sleeve, the second connecting channel extending along the axial direction of the fixed sleeve and penetrating both ends of the fixed sleeve; The friction plate, at least three of them, is disposed on the fixed sleeve. Each friction plate is arranged at intervals along the circumference of the fixed sleeve. The friction plate and the fixed sleeve are connected by a telescopic mechanism. The telescopic mechanism is used to drive the friction plate to extend or retract relative to the fixed sleeve. The rear anchor bolt is fixed in the second connection channel by threads, and the rear anchor bolt is used to trigger the telescopic mechanism to drive the friction plate to extend.

[0006] In an optional or preferred embodiment, the telescopic mechanism includes a spring, a movable ring, a connecting rod, a top support rod, and a buckle. An annular channel is provided inside the wall of the fixed sleeve, and the spring is disposed inside the annular channel. A groove penetrating the annular channel is provided in the wall of the fixed sleeve. The movable ring is assembled inside the annular channel, and a slider is disposed on the movable ring. The slider is slidably assembled in the groove. One end of the spring is fixed to the fixed sleeve, and the other end of the spring is fixed to the movable ring. A connecting rod and a top support rod are provided between each friction plate and the movable ring. One end of the connecting rod and one end of the top support rod are hinged together to the inner side of the friction plate, and the other end of the connecting rod is hinged to the wall of the fixed sleeve. The other end of the top support rod passes through the fixed sleeve. The outer wall of the cylinder has a sliding groove that is hinged to the movable ring. The buckle is fixed to the movable ring and extends from the sliding groove on the inner wall of the fixed sleeve. The two ends of the sliding groove are respectively provided with a first locking groove and a second locking groove. The buckle is provided with a locking plate that can be locked in the first locking groove and the second locking groove. After the rear anchor rod is tightened in the fixed sleeve, it can trigger the buckle to exit from the first locking groove. The spring can push the movable ring to move along the sliding groove to the second locking groove. The buckle can lock in the second locking groove. When the movable ring moves to the buckle locked in the first locking groove, the telescopic mechanism is in a retracted state. When the movable ring moves to the buckle locked in the second locking groove, the telescopic mechanism is in an extended state.

[0007] In an optional or preferred embodiment, the friction plate is an arc-shaped plate structure, and the side of the friction plate used to contact the inner wall of the pipe is arched.

[0008] In an optional or preferred embodiment, the side of the friction plate that contacts the inner wall of the pipe is provided with anti-slip teeth.

[0009] In an optional or preferred embodiment, the outer wall of the fixed sleeve is provided with an installation groove, and the friction plate is fitted into the installation groove.

[0010] In an optional or preferred embodiment, three friction plates are provided, and the angle between the three friction plates is 120°.

[0011] In an optional or preferred embodiment, the connecting rod is provided with a storage groove, and the top support rod is used to be stored in the storage groove.

[0012] In an optional or preferred embodiment, a first elastic pin is provided in the first locking groove, a second elastic pin is provided in the second locking groove, and a through hole is provided on the buckle plate, so that the first elastic pin and the second elastic pin can be engaged in the through hole.

[0013] In an optional or preferred embodiment, the buckle is disposed on the inner ring of the movable ring.

[0014] In an optional or preferred embodiment, the outer diameter of the fixed sleeve is the same as the outer diameter of the base of the jacking sleeve.

[0015] Based on the above technical solution, the embodiments of this application have at least the following beneficial effects: When the movable ring moves to the snap-lock in the first locking groove, the telescopic mechanism is in a retracted state, at which time the friction plate is fully retracted, and the overall outer diameter is at its minimum, facilitating the advancement operation. After the rear anchor rod is tightened in the fixed sleeve, it can trigger the snap-lock to exit from the first locking groove. The design of the triggering mechanism cleverly combines the installation of the anchor rod with the unfolding of the friction plate, realizing automated operation. Subsequently, the spring can push the movable ring along the slide to the second locking groove, and the elastic potential energy released by the spring provides reliable power for the unfolding of the friction plate. The snap-lock can lock in the second locking groove. When the movable ring moves to the snap-lock in the second locking groove, the telescopic mechanism is in an extended state, at which time the friction plate is fully extended, forming effective contact and anchoring with the inner wall of the pipe. The automatic extension function of the friction plate greatly improves the bonding strength and frictional resistance between the connecting sleeve and the surrounding medium, solves the problem of poor adhesion between the sleeve and the surrounding rock and soil or grout, and significantly improves the support effect of the anchor system. Attached Figure Description

[0016] The present application will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the anchor bolt connecting sleeve without extending out of the friction plate according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the anchor bolt connecting sleeve extending out of the friction plate according to an embodiment of this application; Figure 3 yes Figure 2 Side view; Figure 4 This is a schematic diagram showing the connection relationship between the friction plate, connecting rod, top support rod, and movable ring in an embodiment of this application.

[0017] Figure label: 100-Push-in sleeve; 110-First connecting channel; 200-Front-end anchor rod; 300-Fixed sleeve; 400-Friction plate; 410-Mounting groove; 500-Rear-end anchor rod; 600-Telescopic mechanism; 610-Spring; 620-Moving ring; 630-Connecting rod; 631-Receiving groove; 640-Push-up rod; 650-Snap fastener. Detailed Implementation

[0018] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0019] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] In this application, unless otherwise expressly 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 or an electrical connection; 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] In this application, unless otherwise expressly 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.

[0023] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] Anchor bolts, due to their high tensile and bending strength, help overcome the disadvantage that the tensile strength of soil and rock is lower than its compressive strength, thereby enhancing the stability of the soil and rock mass. Currently, anchoring systems are widely used in the support of coal mine roadways, tunnels, slopes, and other fields, and are one of the most important components of soil and rock reinforcement systems.

[0025] In projects with limited construction space, such as roadways and tunnels, if the anchor bolts are designed to be long, sleeves are needed to connect multiple anchor bolt sections and install them in sections. Currently, threaded connection sleeves are commonly used, where two anchor bolts are screwed into the sleeve from both ends and fixed by internal threads. However, the outer surface of the sleeve is relatively smooth, resulting in poor adhesion to the surrounding rock, soil, or grout, which in turn affects the support effect of the anchor bolts.

[0026] Reference Figures 1 to 4 This application provides an anchor bolt connecting sleeve, including a jacking sleeve 100, a front anchor bolt 200, a fixing sleeve 300, a friction plate 400, and a rear anchor bolt 500. It can solve the technical problems of smooth outer surface of the connecting sleeve and poor adhesion to the surrounding rock and soil or grout in the prior art, and significantly improve the support effect and stability of the anchor bolt system.

[0027] The jacking sleeve 100 has a flat-topped conical structure. A first connecting channel 110 is provided in the middle of the jacking sleeve 100. The first connecting channel 110 extends along the axial direction of the jacking sleeve 100 and passes through both ends of the jacking sleeve 100. The interior of the first connecting channel 110 is threaded. The front anchor rod 200 is fixed in the first connecting channel 110 by the thread. The fixing sleeve 300 has a cylindrical structure. One end of the fixing sleeve 300 is fixedly connected to the base of the jacking sleeve 100. A second connecting channel is provided in the middle of the fixing sleeve 300. The second connecting channel extends along the middle of the fixing sleeve 300. The axial extension of 00 passes through both ends of the fixed sleeve 300. At least three friction plates 400 are provided. The friction plates 400 are set on the fixed sleeve 300. Each friction plate 400 is arranged at intervals along the circumference of the fixed sleeve 300. The friction plates 400 and the fixed sleeve 300 are connected by a telescopic mechanism 600. The telescopic mechanism 600 is used to drive the friction plates 400 to extend or retract relative to the fixed sleeve 300. The rear anchor rod 500 is fixed in the second connection channel by threads. The rear anchor rod 500 is used to trigger the telescopic mechanism 600 to drive the friction plates 400 to extend.

[0028] This embodiment provides an anchor bolt connection sleeve, including a jacking sleeve 100, a front anchor bolt 200, a fixing sleeve 300, a friction plate 400, and a rear anchor bolt 500. It effectively solves the technical problem in the prior art that the outer surface of the anchor bolt connection sleeve is relatively smooth, resulting in poor adhesion to the surrounding rock and soil or grout, which in turn affects the anchor bolt support effect.

[0029] The jacking sleeve 100 has a flat-top conical structure. This flat-top conical geometry effectively reduces resistance during jacking, and the flat-top design avoids stress concentration issues that may arise from pointed structures. The conical structure facilitates propulsion operations in soil and rock, significantly improving construction efficiency. A first connecting channel 110 is provided in the middle of the jacking sleeve 100. The first connecting channel 110 extends axially along the jacking sleeve 100 and passes through both ends of the jacking sleeve 100. The interior of the first connecting channel 110 is threaded.

[0030] The front anchor bolt 200 is fixed in the first connection channel 110 by threads. The threaded connection method has the advantages of high connection strength, convenient disassembly and assembly, and good force transmission performance. It can withstand various loads during the operation of the anchor bolt system and ensure the long-term stability and reliability of the connection.

[0031] The fixed sleeve 300 has a cylindrical structure. One end of the fixed sleeve 300 is fixedly connected to the base of the jacking sleeve 100. The rigid connection between the two forms a stable structural whole, ensuring effective force transmission. It should be noted that the outer diameter of the fixed sleeve 300 is the same as the outer diameter of the base of the jacking sleeve 100. This dimensional design ensures the continuity and consistency of the overall shape of the connecting sleeve, avoids stress concentration and increased pushing resistance caused by abrupt diameter changes, makes the sleeve push more smoothly in the pipeline, and improves the aesthetics and manufacturability of the overall structure.

[0032] A second connecting channel is provided in the middle of the fixed sleeve 300. The second connecting channel extends along the axial direction of the fixed sleeve 300 and passes through both ends of the fixed sleeve 300, forming a continuous threaded channel with the first connecting channel 110, providing a complete connection path for the anchor rod. The rear anchor rod 500 is fixed in the second connecting channel by threads. In addition to the basic connection function, the rear anchor rod 500 also plays an important triggering role. The rear anchor rod 500 is used to trigger the telescopic mechanism 600 to drive the friction plate 400 to extend. This design organically combines the installation process of the anchor rod with the unfolding action of the friction plate 400, realizing an automated anchoring process and greatly improving the convenience and reliability of construction.

[0033] At least three friction plates 400 are provided. This configuration forms a stable three-point support system, providing effective radial support while avoiding the structural complexity and increased cost associated with too many friction plates 400. The friction plates 400 are mounted on the fixed sleeve 300, with each plate spaced circumferentially along the sleeve. This circumferential distribution ensures uniform distribution of the support force, preventing structural damage caused by excessive localized stress. Specifically, three friction plates 400 are provided, with an angle of 120° between them. This equiangular distribution creates a perfectly symmetrical structure, optimizing mechanical properties, simplifying the manufacturing process, and improving product standardization and production efficiency.

[0034] The friction plate 400 has an arc-shaped structure. This arc design allows it to better conform to the curvature of the pipe's inner wall, increasing the contact area and improving the contact effect. The side of the friction plate 400 that contacts the pipe's inner wall is arched, generating a greater normal force during contact and enhancing the clamping effect. Furthermore, the side of the friction plate 400 that contacts the pipe's inner wall is equipped with anti-slip teeth. These teeth form an effective mechanical engagement with the soil or pipe's inner wall, significantly improving the friction coefficient and anti-slip capability. Even under large axial loads, it maintains a stable anchoring state, fundamentally solving the technical defect of poor bonding performance in traditional connecting sleeves.

[0035] To ensure precise positioning and stable installation of the friction plate 400, a mounting groove 410 is provided on the outer wall of the fixing sleeve 300, in which the friction plate 400 fits. The mounting groove 410 not only provides an accurate installation position for the friction plate 400, but also provides ample storage space when the friction plate 400 is in the retracted state, allowing the friction plate 400 to be fully embedded in the groove without affecting the overall outer diameter of the sleeve, thus ensuring smooth advancement in confined spaces.

[0036] The friction plate 400 and the fixed sleeve 300 are connected by a telescopic mechanism 600. The telescopic mechanism 600 is used to drive the friction plate 400 to extend or retract relative to the fixed sleeve 300. The telescopic mechanism 600 includes a spring 610, a movable ring 620, a connecting rod 630, a top support rod 640, and a buckle 650.

[0037] An annular channel is provided inside the wall of the fixed sleeve 300, providing movement space for the movable ring 620 and ensuring that the movable ring 620 can move smoothly without jamming. The spring 610 is located inside the annular channel and serves as the power source for the telescopic mechanism 600.

[0038] The fixed sleeve 300 has a groove in its wall that runs through an annular channel. This groove provides guidance and limiting for the movement of the movable ring 620. The movable ring 620 is fitted inside the annular channel and has a slider mounted on it. The slider slides within the groove, and this slider-guided design ensures the accuracy and stability of the movable ring 620's movement. One end of the spring 610 is fixed to the fixed sleeve 300, and the other end is fixed to the movable ring 620, forming a reliable elastic transmission chain.

[0039] Each friction plate 400 is connected to a connecting rod 630 and a top support rod 640 by a one-to-one configuration, ensuring the synchronicity and consistency of the movements of each friction plate 400. One end of the connecting rod 630 and one end of the top support rod 640 are hinged together on the inner side of the friction plate 400, making force transmission more direct and effective. The other end of the connecting rod 630 is hinged to the wall of the fixed sleeve 300, forming a stable fulcrum. The other end of the top support rod 640 passes through a groove on the outer wall of the fixed sleeve 300 and is hinged to the movable ring 620. This through-type connection converts the axial movement of the movable ring 620 into the radial extension and retraction movement of the friction plate 400.

[0040] To optimize structural compactness, the connecting rod 630 is provided with a storage groove 631, in which the top support rod 640 is stored. When the telescopic mechanism 600 is in the retracted state, the top support rod 640 can be completely stored in the storage groove 631 of the connecting rod 630, which not only reduces the overall size but also protects the top support rod 640 from the influence of the external environment, extends its service life, and makes the entire mechanism more compact and aesthetically pleasing.

[0041] The latch 650 is fixed to the movable ring 620 and extends from the groove on the inner wall of the fixed sleeve 300, playing a crucial role in locking the position. The latch 650 is located on the inner ring of the movable ring 620; this layout makes full use of the internal space, resulting in a more compact structure and facilitating engagement with the locking groove. A first locking groove and a second locking groove are respectively provided at both ends of the groove, corresponding to the two working states of the telescopic mechanism 600. The latch 650 is equipped with a locking plate that can engage with the first locking groove and the second locking groove.

[0042] A first elastic pin is provided in the first locking groove, and a second elastic pin is provided in the second locking groove. The latch plate of the buckle 650 has a through hole, into which the first and second elastic pins can engage. The elastic pins provide a reliable locking function and can be easily disengaged when needed, achieving a perfect balance between ease of operation and locking reliability.

[0043] During the operation of the telescopic mechanism 600, when the movable ring 620 moves to the latch 650 and locks in the first locking groove, the telescopic mechanism 600 is in a retracted state. At this time, the friction plate 400 is fully retracted, with its overall outer diameter at its minimum, facilitating the advancement operation. After the rear anchor rod 500 is tightened in the fixed sleeve 300, it can trigger the latch 650 to disengage from the first locking groove. The triggering mechanism cleverly combines the installation of the anchor rod with the unfolding of the friction plate 400, achieving automated operation. Subsequently, the spring 610 can push the movable ring 620 along the slide to the second locking groove. The elastic potential energy released by the spring 610 provides reliable power for the unfolding of the friction plate 400. When the latch 650 moves to the second locking groove and locks, the telescopic mechanism 600 is in an extended state. At this time, the friction plate 400 is fully extended, forming effective contact and anchoring with the inner wall of the pipe.

[0044] The automatic extension function of the friction plate 400 greatly improves the bonding strength and frictional resistance between the connecting sleeve and the surrounding medium, effectively solving the fundamental problem of poor adhesion in the existing technology and significantly improving the support effect of the anchor system.

[0045] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application 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 this application.

Claims

1. A rock bolt coupling sleeve, characterised in that, include: The jacking sleeve has a flat-top conical structure. A first connecting channel is provided in the middle of the jacking sleeve. The first connecting channel extends along the axial direction of the jacking sleeve and passes through both ends of the jacking sleeve. The interior of the first connecting channel is provided with threads. A front anchor bolt, which is fixed in the first connecting channel by threads; A fixed sleeve, wherein the fixed sleeve is a cylindrical structure, one end of the fixed sleeve is fixedly connected to the base of the jacking sleeve, and a second connecting channel is provided in the middle of the fixed sleeve, the second connecting channel extending along the axial direction of the fixed sleeve and penetrating both ends of the fixed sleeve; The friction plate, at least three of them, is disposed on the fixed sleeve. Each friction plate is arranged at intervals along the circumference of the fixed sleeve. The friction plate and the fixed sleeve are connected by a telescopic mechanism. The telescopic mechanism is used to drive the friction plate to extend or retract relative to the fixed sleeve. The rear anchor bolt is fixed in the second connection channel by threads, and the rear anchor bolt is used to trigger the telescopic mechanism to drive the friction plate to extend.

2. The rock bolt coupling sleeve according to claim 1, characterised in that: The telescopic mechanism includes a spring, a movable ring, a connecting rod, a top support rod, and a buckle. An annular channel is provided inside the wall of the fixed sleeve, and the spring is disposed inside the annular channel. A groove penetrating the annular channel is provided in the wall of the fixed sleeve. The movable ring is assembled inside the annular channel and has a slider mounted on it. The slider is slidably assembled in the groove. One end of the spring is fixed to the fixed sleeve, and the other end is fixed to the movable ring. A connecting rod and a top support rod are provided between each friction plate and the movable ring. One end of the connecting rod and one end of the top support rod are hinged to the inner side of the friction plate, and the other end of the connecting rod is hinged to the wall of the fixed sleeve. The other end of the top support rod passes through the outer wall of the fixed sleeve. The slide groove is hinged to the movable ring. The buckle is fixed to the movable ring and extends from the slide groove on the inner wall of the fixed sleeve. The two ends of the slide groove are respectively provided with a first locking groove and a second locking groove. The buckle is provided with a locking plate that can be locked in the first locking groove and the second locking groove. After the rear anchor rod is tightened in the fixed sleeve, it can trigger the buckle to exit from the first locking groove. The spring can push the movable ring to move along the slide groove to the second locking groove. The buckle can lock in the second locking groove. When the movable ring moves to the buckle locked in the first locking groove, the telescopic mechanism is in a retracted state. When the movable ring moves to the buckle locked in the second locking groove, the telescopic mechanism is in an extended state.

3. The anchor bolt connecting sleeve according to claim 1, characterized in that: The friction plate has an arc-shaped structure, and the side of the friction plate that is used to contact the inner wall of the pipe is arched.

4. The anchor bolt connecting sleeve according to claim 3, characterized in that: The friction plate has anti-slip teeth on the side that contacts the inner wall of the pipe.

5. The anchor bolt connecting sleeve according to claim 1, characterized in that: The outer wall of the fixed sleeve is provided with an installation groove, and the friction plate is fitted into the installation groove.

6. The anchor bolt connecting sleeve according to claim 1, characterized in that: The friction plates are provided in three parts, and the angle between the three friction plates is 120°.

7. The anchor bolt connecting sleeve according to claim 2, characterized in that: The connecting rod is provided with a storage groove, and the top support rod is used to be stored in the storage groove.

8. The anchor bolt connecting sleeve according to claim 2, characterized in that: A first elastic pin is provided in the first locking groove, and a second elastic pin is provided in the second locking groove. The buckle plate is provided with a through hole, and the first elastic pin and the second elastic pin can be engaged in the through hole.

9. The anchor bolt connecting sleeve according to claim 2, characterized in that: The buckle is located on the inner ring of the movable ring.

10. The anchor bolt connecting sleeve according to claim 1, characterized in that: The outer diameter of the fixed sleeve is the same as the outer diameter of the base of the jacking sleeve.

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