Combined intelligent side slope anchoring device

Abstract

The invention relates to the technical field of anchoring devices, in particular to a combined intelligent side slope anchoring device which comprises a mounting plate, an anchoring rod is arranged on the mounting plate, an expansion plate is arranged on the anchoring rod, and a local directional expansion unit used for adjusting the position of the expansion plate is arranged on the anchoring rod. Through the arrangement of the local directional expansion unit, when a worker anchors a side slope, the local directional expansion unit can be used for unfolding the expansion plate according to the side slope geological condition (uneven rock-soil density), and then an expansion body is additionally arranged on a loose soil layer section for supporting, so that the local anchoring force is enhanced, and meanwhile, the local directional expansion unit is used for expanding the expansion plate. Partial structures of the local directional expansion units can be separated from the anchoring rods, so that the subsequent pouring work can be facilitated, the local directional expansion units can be reused, and the cost of the side slope anchoring effect can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anchoring devices, in particular to a combined intelligent slope anchoring device. BACKGROUND

[0002] In railway construction, railways often pass through complex terrains such as mountainous areas and river valleys, and may encounter alternating hard and soft rock layers, requiring slope anchoring to ensure the stability of the roadbed. Water conservancy and hydropower projects usually involve the slopes around dams and reservoirs, which may have alluvial layers and tectonic belts that need to be reinforced.

[0003] To solve the above problems, a geotechnical engineering slope anchoring support structure with publication number CN118148167B is provided, which includes a mounting plate, an anchor rod fixedly installed on the bottom surface of the mounting plate, an installation shell symmetrically embedded in the inside of the anchor rod, a connecting shell movably connected to the inside of the anchor rod, and a butt joint shell movably connected to the upper end of the connecting shell. The lower end of the butt joint shell is provided with a drill bit. The conical shape of the drill bit assembly can facilitate drilling into the soil, thereby increasing the embedded strength of the anchor rod and the surrounding soil, and enabling the expansion of the accessory to guide the injection of the slurry and then solidify to form a root-like shape. The one-way movement of the inside of the anchor rod ensures the stability of the drill bit rotation process, and further compacts the soil in the drilled part. The butt joint shell assembly structure can use the pressure caused by the injection of the slurry to drive the drill bit to rotate into the soil, thereby accelerating the installation speed of the support.

[0004] However, in actual use, we found that although the drill bit assembly can smoothly enter the soil and avoid the loosening of the soil surface when inserted into the soil layer, in railway / highway cutting slope engineering, water conservancy and hydropower dam shoulder / reservoir bank slope reinforcement, and tunnel entrance and exit slope reinforcement, the problem of uneven rock and soil density occurs. Specifically, the alternating of loose soil layer and dense rock layer leads to fluctuation of anchoring force, and low-density soil cannot provide sufficient anchoring reaction force, which affects the anchoring force of the slope after grouting, and high-density anchor rods are prone to "pulling" in low-density soil.

[0005] Therefore, we propose a combined intelligent slope anchoring device. SUMMARY

[0006] One of the technical problems to be solved by the present application is how to design a combined intelligent slope anchoring device that improves local anchoring force based on the geological conditions of the slope.

[0007] To solve the above technical problems, the present application provides a combined intelligent slope anchoring device, which includes a mounting plate, an anchor rod provided on the mounting plate, an expansion plate provided on the anchor rod, and a local directional expansion unit for adjusting the position of the expansion plate.

[0008] In some embodiments, the local directional expansion unit comprises an operating outer rod arranged on the anchor rod, a plurality of stretching components are arranged on the anchor rod, and a rotating component connected with the operating outer rod is arranged on the anchor rod.

[0009] In some embodiments, the stretching component comprises a plurality of fixed supports arranged on the anchor rod respectively, a plurality of expansion holes are uniformly arranged on the anchor rod, a plurality of movable supports are arranged on the anchor rod, the fixed supports and the movable supports are used in pairs, a deflection rod is rotatably arranged on the fixed support and the movable support, and a stretching rod is rotatably arranged between the two deflection rods.

[0010] In some embodiments, the expansion plate is arranged on the stretching rod, and the expansion plate is matched with the expansion hole.

[0011] In some embodiments, the rotating component comprises a fixed ring arranged on the operating outer rod, a rotating sliding groove is arranged on the fixed ring, a plurality of connecting rods connected with the movable supports are arranged in the rotating sliding groove, an internal thread is arranged in the anchor rod, and an external thread matched with the internal thread is arranged on the fixed ring.

[0012] In some embodiments, the fixed ring is sleeved outside the operating outer rod, a displacement groove is arranged outside the operating outer rod, an abutment rod is slidably arranged in the displacement groove, an elastic sheet connected with the abutment rod is arranged in the displacement groove, a separation groove is arranged on the fixed ring, and the abutment rod is slidably arranged in the separation groove.

[0013] In some embodiments, a mounting hole is arranged between the anchor rod and the operating outer rod, and a fastening bolt is arranged in the mounting hole.

[0014] In some embodiments, the operating outer rod is a hollow structure, an operating inner rod is movably arranged inside the operating outer rod, an extrusion plate body is arranged at the bottom of the operating inner rod, a positioning support is arranged at the bottom of the operating outer rod, a top rod is slidably arranged on the positioning support, a spring is sleeved outside the top rod, the two ends of the spring are connected with the positioning support and the top rod respectively, and the top rod is matched with the stretching rod.

[0015] In some embodiments, the top rod is inclined near one side of the extrusion plate body, and a replacement top block is arranged at the end of the extrusion plate body near the top rod.

[0016] In some embodiments, a limiting protrusion is arranged on the top rod near the operating inner rod.

[0017] The present application has at least the following advantages:

[0018] 1. When workers are anchoring slopes, the local directional expansion unit can be used to unfold the expansion plate according to the geological conditions of the slope (uneven density of soil and rock), and then add expansion body for support in the loose soil layer, which helps to enhance the local anchoring force.

[0019] 2. Some structures of the local directional expansion unit can be separated from the anchor rod, which not only facilitates subsequent grouting work, allowing grouting to be carried out directly from the center of the anchor rod (the location where the outer and inner operating rods are installed), but also allows for reuse, which helps reduce the cost of slope anchoring.

[0020] 3. The expansion plate and the expansion hole fit together, so that when the anchor rod is inserted into the soil layer, the surrounding soil debris will not directly enter the interior of the anchor rod, which is conducive to protecting the internal structure and ensuring normal operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall partial cross-section of the present invention;

[0023] Figure 3 For the present invention Figure 2 Enlarged structural diagram of area A in the middle;

[0024] Figure 4 For the present invention Figure 1 Schematic diagram of partial cross-section;

[0025] Figure 5 For the present invention Figure 4 Schematic diagram of partial cross-section;

[0026] Figure 6 For the present invention Figure 5 Enlarged structural diagram of area B in the middle;

[0027] Figure 7 This is an exploded view of the partial structure of the localized directional expansion unit of the present invention;

[0028] Figure 8 For the present invention Figure 7 Schematic diagram of partial cross-section;

[0029] Figure 9 For the present invention Figure 8 Enlarged structural diagram of area C;

[0030] Figure 10 This is a schematic diagram of the partial structure of the localized directional expansion unit of the present invention;

[0031] Figure 11 For the present invention Figure 10 Schematic diagram of partial cross-section;

[0032] Figure 12 It is a single expansion plate structure schematic diagram of the application;

[0033] Figure 13 It is an anchor device expanded state schematic diagram in the application;

[0034] Figure 14 It is a positioning support upper part structure explosion schematic diagram of the application;

[0035] Figure 15 It is a part structure top view of the application;

[0036] Figure 16 It is a D area enlarged structure schematic diagram in the application Figure 15

[0037] Figure 17 It is a single extrusion plate body and top rod structure schematic diagram of the application.

[0038] In the figure: 1, mounting plate; 2, anchor rod; 3, expansion plate; 4, local directional expansion unit; 41, operation outer rod; 5, extension component; 51, fixed support; 52, expansion hole; 53, movable support; 54, deflection rod; 55, extension rod; 6, rotating component; 61, fixed ring; 62, rotating sliding slot; 63, connecting rod; 64, internal thread; 65, external thread; 7, displacement slot; 8, abutment rod; 9, elastic sheet; 10, separation slot; 11, fastening bolt; 12, operation inner rod; 13, extrusion plate body; 14, positioning support; 15, top rod; 16, spring; 17, replacement top block; 18, limiting protrusion. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] Embodiment 1

[0041] Please refer to Figures 1-13 , the present application provides a technical solution:

[0042] A combined intelligent slope anchor device, comprising a mounting plate 1, the mounting plate 1 is provided with an anchor rod 2, the anchor rod 2 is provided with an expansion plate 3, the anchor rod 2 is provided with a local directional expansion unit 4 for adjusting the position of the expansion plate 3;

[0043] ​The mounting plate 1 is directly mounted on the slope surface, and is fixed by a plurality of bolts around the mounting plate 1, and the anchoring rod 2 and the mounting plate 1 are fixed and connected by welding, so that the mounting plate 1 and the anchoring rod 2 are preliminarily positioned with the slope;

[0044] The anchoring rod 2 is a hollow structure, the local directional expansion unit 4 is mounted in the anchoring rod 2, and part of the structure inside the anchoring rod 2 can be detached from the anchoring rod 2, and when the part of the structure is detached from the anchoring rod 2, the hollow structure of the anchoring rod 2 can be directly used as a pouring channel;

[0045] During construction, the staff drills a hole in the slope in advance, so that the anchoring rod 2 can be placed in the hole, then the drill bit is removed and the anchoring rod 2 is placed, the mounting plate 1 and the anchoring rod 2 are mounted on the slope by bolts, and then the position of the expansion plate 3 is adjusted by the local directional expansion unit 4, so that the expansion plate 3 can be stretched at the position of the soil layer with low density, and the soil layer around the hole is adhered and extruded, the loose soil layer around the hole is extruded into a compact soil layer, so as to provide sufficient anchoring reaction force;

[0046] The size of the anchoring rod 2 in the scheme is not unique, and can be adjusted according to the actual parameters of the slope anchoring, and the position of the expansion plate 3 is also not unique, and can also be adjusted according to the actual parameters of the slope anchoring.

[0047] The local directional expansion unit 4 comprises an operation outer rod 41 arranged on the anchoring rod 2, a plurality of expansion components 5 arranged on the anchoring rod 2, and a rotating component 6 connected with the operation outer rod 41 and arranged on the anchoring rod 2;

[0048] The expansion component 5 comprises a plurality of fixed supports 51 arranged on the anchoring rod 2, a plurality of expansion holes 52 uniformly arranged on the anchoring rod 2, and a plurality of movable supports 53 arranged on the anchoring rod 2, the fixed supports 51 and the movable supports 53 are used in pairs, and a deflection rod 54 is rotatably arranged on the fixed support 51 and the movable support 53, and an extension rod 55 is rotatably arranged between the two deflection rods 54;

[0049] The fixed support 51 and the movable support 53 are used in pairs, and a plurality of groups of the fixed support 51 and the movable support 53 are arranged in the scheme, each group is used with one expansion plate 3, when the expansion plate 3 needs to be expanded, the position of the movable support 53 is adjusted by rotating the operation outer rod 41, when the movable support 53 moves downward, the deflection rod 54 rotates, and the bottom deflection rod 54 also rotates under the limitation of the bottom fixed support 51, so that the extension rod 55 is extended, and the expansion plate 3 can move out and contact the soil layer;

[0050] The expansion plate 3 is arranged on the extension rod 55, and the expansion plate 3 is attached to the expansion hole 52;

[0051] In the scheme, the expansion plate 3 is arc-shaped on the outer side, and the arc is the same as the arc on the outer side of the anchoring rod 2. In this way, after the expansion plate 3 and the expansion hole 52 are attached, a complete pipe structure similar to a complete pipe structure can be formed, which facilitates the smooth placement of the anchoring rod 2. The expansion plate 3 and the expansion hole 52 are attached, so that when the anchoring rod 2 is inserted into the hole, the surrounding rock and soil debris cannot directly enter the inside of the anchoring rod 2, which is beneficial to the normal operation of the internal structure and avoids the loose soil entering the anchoring rod 2, which causes the expansion plate 3 to extend, and the surrounding soil cannot be squeezed, which is beneficial to improve the subsequent squeezing effect of the expansion plate 3, that is, it can ensure sufficient anchoring reaction force;

[0052] The rotating part 6 comprises a fixed ring 61 arranged on the operation outer rod 41, a rotating sliding groove 62 is formed in the fixed ring 61, a plurality of connecting rods 63 connected with the movable support 53 are arranged in the rotating sliding groove 62, an internal thread 64 is formed in the anchoring rod 2, and an external thread 65 matched with the internal thread 64 is formed in the fixed ring 61;

[0053] The fixed ring 61 is a variable-diameter ring structure, the diameter of the side close to the internal thread 64 is smaller than the diameter of the side away from the internal thread 64, the rotating sliding groove 62 and the connecting rod 63 are arranged on the side of the fixed ring 61 close to the internal thread 64, so as to ensure the normal lifting adjustment of the movable support 53, and the external thread 65 is arranged on the side of the fixed ring 61 away from the internal thread 64, so as to ensure the normal engagement of the external thread 65 and the internal thread 64.

[0054] In use, the worker drills a hole in the slope in advance, so that the anchoring rod 2 can be placed in the drilled hole, then the drill bit is removed and placed in the anchoring rod 2, and the mounting plate 1 and the anchoring rod 2 are installed on the slope by bolts;

[0055] Rotating the operation outer rod 41 drives the fixed ring 61 to rotate, the external thread 65 on the fixed ring 61 and the internal thread 64 are normally engaged, so that the fixed ring 61 and the connecting rod 63 move downward, and the movable support 53 will move downward with the fixed ring and the connecting rod 63 but will not rotate due to the arrangement of the rotating sliding groove 62, the deflection rod 54, the fixed support 51 and the extension rod 55;

[0056] The movable support 53 drives the deflection rod 54 to rotate, and the bottom deflection rod 54 will also rotate under the limitation of the bottom fixed support 51, so as to extend the extension rod 55, so that the expansion plate 3 can move out to form an expansion body and contact the soil layer, so that the expansion plate 3 can be stretched in the position of the soil layer with low density, and the soil layer around the hole can be attached and squeezed, the loose soil layer around the hole is squeezed into a compact soil layer, so as to provide sufficient anchoring reaction force.

[0057] Embodiment 2

[0058] Referring to Figures 4-9 , the application provides a technical scheme:

[0059] A combined intelligent slope anchoring device, the fixed ring 61 is sleeved outside the operation outer rod 41, the operation outer rod 41 is provided with a displacement slot 7 outside, the displacement slot 7 is provided with an abutment rod 8 slidingly, the displacement slot 7 is provided with an elastic sheet 9 connected with the abutment rod 8, the fixed ring 61 is provided with a separation slot 10, and the abutment rod 8 is slidingly arranged in the separation slot 10;

[0060] The number of the displacement slot 7, the abutment rod 8, the elastic sheet 9 and the separation slot 10 is same, and is consistent with the number of the expansion plate 3, the abutment rod 8 is T-shaped structure, the abutment rod 8 is slidingly arranged in the displacement slot 7 at a wider position, and the abutment rod 8 is chamfered, so that the abutment rod 8 can smoothly enter the displacement slot 7 and ensure normal folding of the abutment rod 8, the separation slot 10 is also T-shaped structure, so that the abutment rod 8 can rotate smoothly, one side of the separation slot 10 is provided with an inclined surface, and a separation slot is formed on the side of the separation slot 10 close to the inclined surface, so that the abutment rod 8 can gradually slide out of the separation slot and enter the displacement slot 7 when close to the inclined surface.

[0061] In the scheme, clockwise rotation of the operation outer rod 41 can control the abutment rod 8 to drive the fixed ring 61 to rotate clockwise, so that the external thread 65 on the fixed ring 61 can be engaged with the internal thread 64 on the anchoring rod 2, and then the adjustment of the expansion plate 3 is completed, after the adjustment of the expansion plate 3 is completed, counterclockwise rotation of the operation outer rod 41 can control the abutment rod 8 to rotate counterclockwise, but because the external thread 65 and the internal thread 64 have been engaged, at this time, only the abutment rod 8 can be driven to rotate along the separation slot 10, when the abutment rod 8 reaches the inclined surface of the separation slot 10, the abutment rod 8 will gradually move out of the separation slot and enter the displacement slot 7, then the operation outer rod 41 is lifted upwards to be separated from the anchoring rod 2.

[0062] Embodiment 3

[0063] Referring to Figure 2 , Figure 7 and Figure 8 , the application provides a technical scheme:

[0064] A combined intelligent slope anchoring device, the anchoring rod 2 and the operation outer rod 41 are provided with a mounting hole, and the mounting hole is provided with a fastening bolt 11;

[0065] The arrangement of the fastening bolt 11 can prevent the operation outer rod 41 and the anchoring rod 2 from being misaligned, and the abutting rod 8 cannot shake back and forth in the separation groove 10, so that the normal connection of the operation outer rod 41 and the fixing ring 61 is ensured, and the subsequent smooth adjustment of the operation outer rod 41 is ensured.

[0066] Embodiment 4

[0067] Please refer to Figure 13 , the present application provides a technical scheme:

[0068] A combined intelligent slope anchoring device, the operation outer rod 41 is a hollow structure, and the operation inner rod 12 is movably arranged inside, the operation inner rod 12 is provided with an extrusion plate body 13 at the bottom, the operation outer rod 41 is provided with a positioning support 14 at the bottom, the positioning support 14 is slidably provided with a top rod 15, the top rod 15 is sleeved with a spring 16 outside, the spring 16 is connected with the positioning support 14 and the top rod 15 at both ends respectively, and the top rod 15 is attached with the extension rod 55;

[0069] The internal thread 64 is composed of a smooth section close to the external thread 65 and a threaded section away from the threaded hole, and the external thread 65 is located at the smooth section in the initial state, when the top rod 15 extrudes the extension rod 55, the extension rod 55 is displaced outward, which can drive the deflection rod 54 and the connecting rod 63 to be displaced downward, at this time, the external thread 65 is displaced downward and attached to the threaded section, so that the external thread 65 and the internal thread 64 can be engaged when the fixing ring 61 is subsequently rotated;

[0070] The operation outer rod 41 and the operation inner rod 12 are rotatably connected through a bearing, the positioning support 14 is arranged at the bottom of the operation outer rod 41, and there is a rotation gap between the positioning support 14 and the operation inner rod 12, so as to ensure the normal rotation of the operation outer rod 41 and the operation inner rod 12;

[0071] Rotating the operation inner rod 12 can drive the extrusion plate body 13 at the bottom to rotate, the rotation of the extrusion plate body 13 can extrude the top rod 15, so that the top rod 15 is displaced forward in the positioning support 14, and the extension rod 55 is pushed out by a certain distance, at this time, under the action of the deflection rod 54 and the connecting rod 63, the fixing ring 61 is displaced downward, so that the external thread 65 is attached to the threaded section.

[0072] Embodiment 5

[0073] Please refer to Figures 13-17 , the present application provides a technical scheme:

[0074] The combination type intelligent slope anchoring device, the top rod 15 is inclined near one side of the extrusion plate body 13, the extrusion plate body 13 is provided with a replacement top block 17 near one side end of the top rod 15, the replacement top block 17 is a cuboid structure parallel to the extrusion plate body 13, bolt through holes are formed in the extrusion plate body 13 and the replacement top block 17, and bolts are arranged in the bolt through holes, so that the extrusion plate body 13 and the replacement top block 17 can be replaced through the bolts;

[0075] The replacement top block 17 is arranged to solve the problem that the corner position of the extrusion plate body 13 near the top rod 15 is continuously in contact with the top rod 15 when the extrusion plate body 13 rotates, so that the wear degree of the position is much larger than that of other positions, and therefore, the position needs to be replaced frequently, and the replacement top block 17 is arranged to compensate for the defect and reduce the replacement of the extrusion plate body 13.

[0076] Embodiment 6

[0077] Please refer to Figures 13-17 The application provides a technical scheme:

[0078] The combination type intelligent slope anchoring device, the top rod 15 is provided with a limiting protrusion 18 near one side of the operation inner rod 12, the limiting protrusion 18 is arranged to avoid the dislocation of the extrusion plate body 13 and the top rod 15 caused by excessive rotation of the extrusion plate body 13, because the replacement top block 17 is arranged at the corner position of the extrusion plate body 13 near the top rod 15, and therefore, only one limiting protrusion 18 is needed to limit the replacement top block 17.

[0079] It should be noted that, in the present document, the terms such as first and second, etc., are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0080] Although the embodiments of the application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the application.

Claims

1. A combined intelligent slope anchoring device, comprising an mounting plate (1), characterized in that: An anchor rod (2) is provided on the mounting plate (1), an extension plate (3) is provided on the anchor rod (2), and a local directional extension unit (4) for adjusting the position of the extension plate (3) is provided on the anchor rod (2).

2. The combined intelligent slope anchoring device according to claim 1, characterized in that: The local directional expansion unit (4) includes an operating outer rod (41) set on the anchor rod (2), the anchor rod (2) is provided with a plurality of extension parts (5), and the anchor rod (2) is provided with a rotating part (6) connected to the operating outer rod (41).

3. The combined intelligent slope anchoring device according to claim 2, characterized in that: The extension component (5) includes multiple fixed supports (51) respectively disposed on the anchor rod (2). Multiple expansion holes (52) are evenly provided on the anchor rod (2). Multiple movable supports (53) are provided on the anchor rod (2). The fixed supports (51) and movable supports (53) are used in pairs. A deflection rod (54) is rotatably disposed on both the fixed supports (51) and the movable supports (53). An extension rod (55) is rotatably disposed between the two deflection rods (54).

4. The combined intelligent slope anchoring device according to claim 3, characterized in that: The extension plate (3) is mounted on the extension rod (55), and the extension plate (3) and the extension hole (52) are in contact.

5. The combined intelligent slope anchoring device according to claim 3, characterized in that: The rotating component (6) includes a fixed ring (61) on the operating outer rod (41), a rotating groove (62) is provided on the fixed ring (61), a plurality of connecting rods (63) are provided in the rotating groove (62) and connected to the movable support (53) respectively, an internal thread (64) is provided in the anchor rod (2), and an external thread (65) is provided on the fixed ring (61) to cooperate with the internal thread (64).

6. The combined intelligent slope anchoring device according to claim 5, characterized in that: The fixing ring (61) is sleeved on the outside of the operating rod (41). A displacement groove (7) is provided on the outside of the operating rod (41). An abutment rod (8) is slidably disposed in the displacement groove (7). An elastic piece (9) connected to the abutment rod (8) is provided in the displacement groove (7). A separation groove (10) is provided on the fixing ring (61). The abutment rod (8) is slidably disposed in the separation groove (10).

7. The combined intelligent slope anchoring device according to claim 2, characterized in that: An installation hole is provided between the anchor rod (2) and the operating outer rod (41), and a fastening bolt (11) is provided in the installation hole.

8. The combined intelligent slope anchoring device according to claim 3, characterized in that: The outer operating rod (41) is a hollow structure, and an inner operating rod (12) is movably installed inside it. A pressing plate (13) is installed at the bottom of the inner operating rod (12). A positioning bracket (14) is installed at the bottom of the outer operating rod (41). A top rod (15) is slidably installed on the positioning bracket (14). A spring (16) is sleeved on the outside of the top rod (15). The two ends of the spring (16) are connected to the positioning bracket (14) and the top rod (15) respectively. The top rod (15) and the extension rod (55) are in contact.

9. The combined intelligent slope anchoring device according to claim 8, characterized in that: The top rod (15) is inclined on the side near the extrusion plate (13), and a replacement top block (17) is provided at the end of the extrusion plate (13) near the top rod (15).

10. The combined intelligent slope anchoring device according to claim 8, characterized in that: A limit protrusion (18) is provided on the top rod (15) near the operating inner rod (12).

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