Pressure type anchor rod with recyclable anchor core

Abstract

The utility model discloses a pressure type anchor rod with a recoverable anchor core, relates to the field of foundation engineering, and solves the problems that an existing pressure type anchor rod with a recoverable anchor core is complex in structure, and the operation of recovering the anchor core is complex. According to the technical scheme, the pressure type anchor rod with the recyclable anchor core comprises a sleeve, the anchor core which is located in the sleeve and can transmit torque, an anchor head and a bearing body, the front end and the rear end of the anchor core penetrate out of the front end and the rear end of the sleeve respectively, the rear end of the anchor core is connected with the anchor head, and the anchor head abuts against the rear end of the sleeve. The bearing body abuts against or is fixedly connected with the front end of the sleeve, the front end of the anchor core is fixedly connected with a clamping plate, a through hole matched with the clamping plate in shape is formed between the two bottom faces of the cylinder corresponding to the bearing body, or a blind hole is formed in one bottom face of the cylinder corresponding to the bearing body, and the blind hole is divided into an orifice section and an in-hole section. The front end of the anchor core is detachably connected with the through hole or the blind hole of the bearing body through the clamping plate, and the anchor core can be recycled by rotating the anchor core.

Description

Technical Field

[0001] The utility model relates to the field of foundation engineering, in particular to a pressure-type anchor rod with a recoverable anchor core. Background Art

[0002] For temporary projects such as foundation pits, ordinary anchor rods have lost their functions after the foundation pits are backfilled. If they are still buried underground, they will not only bring obstacles and potential hazards to subsequent engineering construction, but also cause a significant waste of resources.

[0003] In order to realize the recoverability of the anchor core of the existing pressure-type anchor rod, most of them adopt complex structures, which not only have high production and manufacturing costs, but also poor stability, resulting in a low success rate of recovering the anchor core. For example, the content disclosed in the patent with the application publication number CN 112962594A relates to a recoverable pressure-type anchor rod, including a plastic sleeve, a steel bar rod body and an unlocking device. After the pressure-type anchor rod completes the support task, the pressure-type anchor rod is recovered: the backing plate and the anchor head are removed, the steel bar rod body is rotated clockwise upwards, the steel bar rod body rises, the first diameter-reducing section moves upwards in the split pressure-bearing ring, the saw teeth on the top section of the second diameter-reducing section are engaged with the saw teeth on the bottom section of the lifting screw rod, and at the same time, the lifting screw rod is driven to rotate and rise. The rotation and rise of the lifting screw rod drive the transmission gear to rotate, thereby driving the gear clamping arm to unfold, and the split pressure-bearing ring opens, releasing the locking of the first diameter-reducing section of the steel bar rod body, completing the first unlocking procedure. Then, the steel bar rod body is continuously rotated clockwise. When the lifting screw rod touches the top limiter, the steel bar rod body is rotated in the reverse direction. When the spiral section of the steel bar rod body is screwed out of the thread limiter counterclockwise, the second unlocking procedure is completed, and the steel bar rod body can be withdrawn. The unlocking device of the pressure-type anchor rod involved in this patent has a complex structure, and the operation of recovering the steel bar rod body is also relatively complex. The steel bar rod body is prone to damage after recovery and cannot be reused as an anchor core. Summary of the Utility Model

[0004] The utility model provides a pressure-type anchor rod with a recoverable anchor core, which solves the problems of the complex structure of the existing pressure-type anchor rod with a recoverable anchor core and the complex operation of recovering the anchor core.

[0005] The technical solution adopted by the utility model is as follows: a pressure-type anchor rod with a retrievable anchor core, including a casing, an anchor core located inside the casing and capable of transmitting torque, as well as an anchor head and a carrier. The front and rear ends of the anchor core respectively penetrate through the front and rear ends of the casing. The rear end of the anchor core is connected to the anchor head, and the anchor head abuts against the rear end of the casing. A clamping plate is fixedly connected to the front end of the anchor core. The clamping plate has at least one blade along the radial direction of the anchor core. The outer contour of the carrier is cylindrical and the diameter of the cylinder is larger than the outer diameter of the casing. A through hole with a shape adapted to the shape of the clamping plate is provided between the two bottom surfaces of the cylinder corresponding to the carrier, or a blind hole is provided on one bottom surface of the cylinder corresponding to the carrier. The blind hole is divided into two continuous sections, namely an orifice section and an inner hole section. The shape of the orifice section is adapted to the shape of the clamping plate, and the inner hole section is cylindrical. The radius of the cylinder corresponding to the inner hole section is not less than the radius of the rotation of the clamping plate around the anchor core. The front end of the anchor core is detachably connected to the through hole or the blind hole of the carrier through the blade, and the carrier abuts against or is fixedly connected to the front end of the casing.

[0006] In order to optimize the force between the clamping plate at the front end of the anchor core and the carrier, further: the front end of the anchor core is fixedly connected to the center of the clamping plate. The clamping plate is evenly provided with 2 to 4 blades. The outer edges of each blade are arc-shaped and the corresponding centers of each arc coincide and are located on the axis of the anchor core.

[0007] In order to facilitate the accurate positioning of the carrier and the casing, further: the surface of the carrier that cooperates with the front end of the casing is provided with a circular positioning groove or a positioning rib. The front end of the casing is located in the positioning groove and is fixedly connected between them. The front end of the casing is located inside or outside the positioning rib and is fixedly connected between them. For example, the connection between the carrier and the front end of the casing is a mechanical connection, a welding connection or an adhesive connection.

[0008] The anchor core can transmit torque. By manually rotating the rear end of the anchor core, the corresponding rotation of the blade at the front end of the anchor core can be controlled. For example: the anchor core is a solid smooth steel bar or a threaded steel bar. The casing can be made of metal or plastic. In order to ensure that the strength of the casing meets the usage requirements and control costs, specifically: the casing is an iron pipe or a steel pipe that has been subjected to anti-corrosion treatment. For example, the casing is a galvanized iron pipe.

[0009] In order to make the casing located at the center position of the drilling hole as much as possible, that is, to make the center line of the casing coincide with the center line of the drilling hole as much as possible, further: at least one centering bracket is fixedly provided on the outer periphery of the casing. When there are two or more centering brackets, each centering bracket is arranged at intervals along the axial direction of the casing.

[0010] In order to reduce the friction between the anchor core and the casing and thus reduce the difficulty of retrieving the anchor core, further: the gap between the anchor core and the casing is filled with a lubricant. For example, the lubricant is silicone oil or calcium-based grease.

[0011] To reduce the resistance of inserting the carrier into the drill hole and to ensure that after the carrier is inserted to the predetermined depth of the drill hole, the two bottom surfaces of the cylinder corresponding to the carrier are perpendicular to the depth direction of the drill hole. Further, a guiding member is fixedly connected to the bottom surface of the cylinder corresponding to the carrier that faces away from the anchor core. The axis of the guiding member coincides with the axis of the carrier. The guiding member is divided into two sections, a cylindrical section and a guiding section. The cylindrical section is in the shape of a cylinder or a circular cylinder, and the guiding section is in the shape of a cone or a hemisphere. The diameter of the cylindrical section is not greater than the diameter of the cylinder corresponding to the carrier. The bottom surface of the guiding section is of the same size as and fixedly connected to or is an integral part of one bottom surface of the cylindrical section.

[0012] To prevent the clamping plate at the front end of the anchor core from being overly inserted into the through hole or blind hole of the carrier. Further, a limiting ring is fixedly provided at a position near the clamping plate at the front end of the anchor core.

[0013] To facilitate controlling the relative position of the clamping plate of the anchor core and the orifice section of the through hole or blind hole of the carrier, so that the clamping plate cannot continue to rotate after rotating to a predetermined position. Further, the carrier is also fixedly provided with at least one limiting post that abuts and cooperates with the blade of the clamping plate. For example, when the carrier is provided with two limiting posts, when the blade abuts against one of the limiting posts, the clamping plate at the front end of the anchor core is aligned with the orifice section of the through hole or blind hole of the carrier. When the blade abuts against the other limiting post, the clamping plate at the front end of the anchor core is misaligned with the orifice section of the through hole or blind hole of the carrier.

[0014] The beneficial effects of the present utility model are as follows: When the clamping plate at the front end of the anchor core is aligned with the orifice section of the through hole or blind hole of the carrier, the clamping plate at the front end of the anchor core can be inserted into the orifice section of the through hole or blind hole of the carrier. At this time, rotate the anchor core to misalign the blade with the orifice section of the through hole or blind hole of the carrier, and a connection is achieved between the anchor core and the carrier and tensile force can be transmitted. Rotate the anchor core to align the blade with the orifice section of the through hole or blind hole of the carrier, and the front end and the clamping plate of the anchor core can be taken out from the through hole or blind hole of the carrier, so that the anchor core is disengaged from the carrier, thereby realizing the recovery of the anchor core. The front end of the anchor core is detachably connected to the through hole or blind hole of the carrier through the clamping plate, with a simple structure, reliable connection, low production cost, and convenient installation and recovery operations of the anchor core. The recovery success rate of the anchor core is high, the damage rate is low, and the anchor core can be reused multiple times after recovery. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram after inserting into a drill hole in an embodiment of the present utility model.

[0016] Figure 2 is Figure 1 a schematic diagram of the mating relationship between the anchor core and the carrier in the shown embodiment.

[0017] Reference signs: casing 1, anchor core 2, anchor head 3, carrier 4, positioning groove 41, clamping plate 5, centering bracket 6, guide 7, cylindrical section 71, guiding section 72, limiting ring 8, limiting post 9, drilling hole 10. Detailed implementation mode

[0018] The present utility model will be further described below in conjunction with the accompanying drawings.

[0019] As Figure 1 shown, the pressure-type anchor rod with recoverable anchor core of the present utility model includes a casing 1, an anchor core 2 located inside the casing 1 and capable of transmitting torque, as well as an anchor head 3 and a carrier 4. The two ends of the casing 1 and the anchor core 2 are respectively the front end and the rear end. The front end is used for inserting into the drilling hole 10, and the rear end is located at the orifice position of the drilling hole 10 during use. The space between the outer wall of the casing 1 and the hole wall of the drilling hole 10 is used for grouting or pouring concrete. In order to make the casing 1 located at the center position of the drilling hole 10 as much as possible, that is, to make the center line of the casing 1 coincide with the center line of the drilling hole 10 as much as possible, at least one centering bracket 6 is fixedly arranged on the outer periphery of the casing 1. The centering bracket 6 has a gap to avoid affecting the flow of the grout or concrete for pouring. The corresponding outer diameter of the centering bracket 6 is adapted to the diameter of the drilling hole 10. The centering bracket 6 is determined according to the depth of the drilling hole 10. There are two or more centering brackets 6, and each centering bracket 6 is arranged at intervals along the axial direction of the casing 1. The front and rear ends of the anchor core 2 respectively pass through the front and rear ends of the casing 1. The rear end of the anchor core 2 is connected to the anchor head 3. The anchor head 3 includes an anchor backing plate and an anchor bolt, and the anchor head 3 abuts against the rear end of the casing 1.

[0020] A clamping plate 5 is fixedly connected to the front end of the anchor core 2. The clamping plate 5 has at least one blade along the radial direction of the anchor core 2. The anchor core 2 can transmit torque. By rotating the rear end of the anchor core 2, the front end of the anchor core 2 and the clamping plate 5 can rotate synchronously. The anchor core 2 is generally a solid rod-shaped object and is made of metal material. For example, the anchor core 2 is a solid smooth bar or a threaded bar, and the smooth bar refers to a bar with a flat surface. The clamping plate 5 is used to cooperate with the carrier 4 to realize the detachable connection between the anchor core 2 and the carrier 4. In order to ensure the strength of the clamping plate 5, the clamping plate 5 is preferably made of metal material, generally a steel plate. In order to balance the force between the clamping plate 5 and the carrier 4 and ensure the stable connection between the anchor core 2 and the clamping plate 5, the front end of the anchor core 2 is fixedly connected to the center of the clamping plate 5. The clamping plate 5 and the front end of the anchor core 2 can be mechanically connected or welded. The middle part of the clamping plate 5 is preferably circular, and the diameter of the circle is the same as the diameter of the anchor core 2, so that the contact area between the two is the largest and the stability of the two is ensured.

[0021] The outer contour of the carrier 4 is cylindrical, and the diameter of the cylinder is greater than the outer diameter of the sleeve 1. The diameter of the cylinder corresponding to the carrier 4 is generally adapted to the diameter of the borehole 10. The carrier 4 is used to provide a reaction force for the anchor core 2 when the anchor core 2 is in tension. Therefore, the carrier 4 is generally a plate member, and a metal plate member, such as a steel plate. The thickness of the steel plate is the height of the cylinder corresponding to the carrier 4. When the carrier 4 is a steel plate, the thickness of the steel plate is determined according to mechanical calculations and is generally not less than 10 mm. A through hole having a shape adapted to the shape of the clamping plate 5 is provided between the two bottom surfaces of the cylinder corresponding to the carrier 4. The through hole penetrates the carrier 4, and the front end of the anchor core 2 and the clamping plate 5 can be inserted into the through hole; alternatively, a blind hole is provided on one bottom surface of the cylinder corresponding to the carrier 4. The blind hole does not penetrate the carrier 4, and the front end of the anchor core 2 and the clamping plate 5 can be inserted into the blind hole. The front end of the anchor core 2 is detachably connected to the through hole or blind hole of the carrier 4 through a blade. The blind hole of the carrier 4 is divided into two continuous sections, namely an orifice section and an inner hole section. The shape of the orifice section is adapted to the shape of the clamping plate 5. The front end of the anchor core 2 and the clamping plate 5 can be inserted into the orifice section. The inner hole section is cylindrical, and the radius of the cylinder corresponding to the inner hole section is not less than the radius of rotation of the clamping plate 5 around the anchor core 2. The front end of the anchor core 2 and the clamping plate 5 can rotate in the inner hole section.

[0022] When the clamping plate 5 at the front end of the anchor core 2 is aligned with the orifice section of the through hole or blind hole of the carrier 4, the clamping plate 5 at the front end of the anchor core 2 can be inserted into the orifice section of the through hole or blind hole of the carrier 4. After the clamping plate 5 passes through the through hole of the carrier 4, or after the clamping plate 5 passes through the orifice section of the blind hole and enters the inner hole section, the carrier 4 remains fixed. Rotate the anchor core 2 to displace the blade from the orifice section of the through hole or blind hole of the carrier 4, and a connection is achieved between the anchor core 2 and the carrier 4 and the tension can be transmitted. The carrier 4 remains fixed. Rotate the anchor core 2 to align the blade of the clamping plate 5 with the orifice section of the through hole or blind hole of the carrier 4, and the front end of the anchor core 2 and the clamping plate 5 can be removed from the through hole or blind hole of the carrier 4, so that the anchor core 2 is disengaged from the carrier 4, and thus the recovery of the anchor core 2 is realized.

[0023] In order to balance the force between the clamping plate 5 and the carrier 4, there are at least two blades around the clamping plate 5, and the shapes of the respective blades are the same and are arranged at equal central angles. Generally, the number of blades on the clamping plate 5 is 2 to 4. For example, Figure 2 in the illustrated embodiment, the number of blades on the clamping plate 5 is two, and the two blades are arranged in a straight line. In order to increase the contact area between the clamping plate 5 and the carrier 4 and reduce the force per unit area of the clamping plate 5, the outer edges of the respective blades are arc-shaped and the centers of the corresponding arcs coincide and are located on the axis of the anchor core 2.

[0024] The carrier 4 abuts against or is fixedly connected to the front end of the sleeve 1. Since grout or concrete is to be poured outside the carrier 4 and the sleeve 1, sealing is achieved between the front end of the sleeve 1 and the carrier 4 through abutment, or the carrier 4 is fixedly connected to and sealed with the sleeve 1. To facilitate the quick and accurate positioning of the carrier 4 and the sleeve 1, the surface of the carrier 4 that mates with the front end of the sleeve 1 is provided with a circular positioning groove 41 or a positioning rib. The front end of the sleeve 1 is fixedly connected to the positioning groove 41 or the positioning rib of the carrier 4. The inner diameter of the positioning groove 41 is adapted to the inner diameter of the sleeve 1, and the outer diameter of the positioning groove 41 is adapted to the outer diameter of the sleeve 1. The front end of the sleeve 1 is inserted into the positioning groove 41, and then the two are fixed. The outer diameter of the positioning rib is adapted to the inner diameter of the sleeve 1. The front end of the sleeve 1 is inserted into the positioning rib, and then the two are fixed; or the inner diameter of the positioning rib is adapted to the outer diameter of the sleeve 1, and the positioning rib is inserted into the front end of the sleeve 1, and then the two are fixed. The carrier 4 and the sleeve 1 are fixedly connected through existing fixing methods, such as mechanical connection, welding connection or bonding connection between the carrier 4 and the front end of the sleeve 1. The sleeve 1 can be made of metal or plastic. To ensure that the strength of the sleeve 1 meets the usage requirements and control costs, the sleeve 1 is generally made of an iron pipe or a steel pipe, and preferably an iron pipe that has been anti-corrosion treated. For example, the sleeve is a galvanized iron pipe. The carrier 4 and the sleeve 1 are generally made of iron or steel, so they are generally welded together, which not only achieves the sealing of the two, but also easily ensures the stability of the two.

[0025] To reduce the friction between the anchor core 2 and the sleeve 1 and thus reduce the difficulty of recovering the anchor core 2, the gap between the anchor core 2 and the sleeve 1 is filled with a lubricant. For example, the lubricant is silicone oil or calcium-based grease. Filling the gap between the anchor core 2 and the sleeve 1 with the lubricant can also prevent the poured slurry or concrete from entering the gap between the anchor core 2 and the sleeve 1. When the anchor core 2 is made of steel, the lubricant also has the function of preventing the anchor core 2 from being rusted.

[0026] In order to ensure that after the carrier 4 is inserted to the predetermined depth of the drilling hole 10, the two bottom surfaces of the cylinder corresponding to the carrier 4 are perpendicular to the depth direction of the drilling hole 10, a guiding member 7 is fixedly connected to the bottom surface of the cylinder corresponding to the carrier 4 that faces away from the anchor core 2. The length direction of the guiding member 7 is consistent with the depth direction of the drilling hole 10, which is conducive to keeping the two bottom surfaces of the cylinder corresponding to the carrier 4 perpendicular to the depth direction of the drilling hole 10. The axis of the guiding member 7 coincides with the axis of the carrier 4. The guiding member 7 is made of metal, generally iron or steel. In order to reduce the resistance of inserting the carrier 4 into the drilling hole 10, the guiding member 7 is divided into two sections, a cylindrical section 71 and a guiding section 72. The cylindrical section 71 is in the shape of a cylinder or a circular cylinder. When through holes are provided between the two bottom surfaces of the cylinder corresponding to the carrier 4, the cylindrical section 71 is in the shape of a circular cylinder, and the inner cavity of the cylindrical section 71 is used to accommodate the front end of the anchor core 2 and the clamping plate 5. When a blind hole is provided on one bottom surface of the cylinder corresponding to the carrier 4, the front end of the anchor core 2 and the clamping plate 5 will not penetrate out of the blind hole. Therefore, the cylindrical section 71 can be in the shape of a cylinder or a circular cylinder. The diameter of the cylindrical section 71 of the guiding member 7 is not greater than the diameter of the cylinder corresponding to the carrier 4. The guiding section 72 is in the shape of a cone or a hemisphere. The bottom surface of the guiding section 72 is equal in size to and relatively fixed to one bottom surface of the cylindrical section 71. The cylindrical section 71 and the guiding section 72 can be fixedly connected or can be an integral body. The carrier 4 and the guiding member 7 can be fixedly connected or can be an integral body. In order to prevent the clamping plate 5 at the front end of the anchor core 2 from being excessively inserted into the through hole or blind hole of the carrier 4, a limiting ring 8 can also be fixedly provided at a position near the clamping plate 5 at the front end of the anchor core 2. For example, the limiting ring 8 is made of a steel plate with a thickness of 5 mm, and the distance between the limiting ring 8 and the clamping plate 5 is 5 mm.

[0027] In order to facilitate the control of the relative position between the clamping plate 5 of the anchor core 2 and the orifice section of the through hole or blind hole of the carrier 4, so that the clamping plate 5 cannot continue to rotate after rotating to a predetermined position, where the predetermined position generally refers to the alignment of the clamping plate 5 with the orifice section of the through hole or blind hole, and the position that is most conducive to the clamping plate 5 receiving force, the carrier 4 is also fixedly provided with a limiting post 9 that abuts and cooperates with the blade of the clamping plate 5, and there is at least one limiting post 9. For example, see Figure 2 , the carrier 4 is provided with two limiting posts 9. When the blade abuts against one of the limiting posts 9, the clamping plate 5 at the front end of the anchor core 2 is aligned with the orifice section of the through hole or blind hole of the carrier 4. At this time, it is convenient to pull out the front end and the clamping plate 5 of the anchor core 2; when the blade abuts against the other limiting post 9, the clamping plate 5 at the front end of the anchor core 2 is misaligned with the orifice section of the through hole or blind hole of the carrier 4, which is conducive to the force between the clamping plate 5 and the carrier 4. For the convenience of construction, the limiting post 9 is generally a steel post and is welded and fixed to the carrier 4. The size of the limiting post 9 is calculated and determined according to the force requirements. Generally, the diameter of the limiting post 9 is not less than 5 mm, and the height is 10 - 15 mm.

[0028] The construction process and working principle of the pressure-type anchor rod with a recoverable anchor core of the present utility model are the same as those of the existing ordinary pressure-type anchor rod. After the anchoring work is completed, the anchor head 3 is removed, and the anchor core 2 is rotated, so that the anchor core 2 and the clamping plate 5 can be withdrawn to realize the reuse of the anchor core.

Claims

1. A pressure anchor with a retrievable anchor core, comprising a casing (1), an anchor core (2) located in the casing (1) and capable of transmitting torque, an anchor head (3) and a bearing body (4), wherein the front and rear ends of the anchor core (2) respectively pass through the front and rear ends of the casing (1), the rear end of the anchor core (2) is connected to the anchor head (3), and the anchor head (3) abuts against the rear end of the casing (1), and is characterized in that: The front end of the anchor core (2) is fixedly connected to a clamping plate (5), the clamping plate (5) having at least one blade along the radial direction of the anchor core (2); the outer contour of the carrier (4) is cylindrical and the diameter of the cylinder is larger than the outer diameter of the sleeve (1); a through hole whose shape matches the shape of the clamping plate (5) is provided between the two bottom surfaces of the cylinder corresponding to the carrier (4), or a blind hole is provided on one bottom surface of the cylinder corresponding to the carrier (4); the blind hole is divided into two continuous sections, namely, a hole mouth section and an inner hole section; the shape of the hole mouth section matches the shape of the clamping plate (5); the inner hole section is cylindrical; the radius of the cylinder corresponding to the inner hole section is not less than the radius of rotation of the clamping plate (5) around the anchor core (2); the front end of the anchor core (2) is detachably connected to the through hole or blind hole of the carrier (4) through the blade, and the carrier (4) is abutted or fixedly connected to the front end of the sleeve (1).

2. The pressure anchor with recoverable anchor core according to claim 1, characterized in that: The front end of the anchor core (2) is fixedly connected to the center of the clamping plate (5), and the clamping plate (5) is evenly provided with 2 to 4 blades, the outer edge of each blade is in an arc shape, and the corresponding center of each arc coincides and is located on the axis of the anchor core (2).

3. The pressure anchor with recoverable anchor core according to claim 1, characterized in that: A circular positioning groove (41) or a positioning convex ridge is provided on the surface where the carrier (4) and the front end of the sleeve (1) cooperate, the front end of the sleeve (1) is located in the positioning groove (41) and the two are fixedly connected, and the front end of the sleeve (1) is located on the inner side or the outer side of the positioning convex ridge and the two are fixedly connected.

4. The pressure anchor with recoverable anchor core according to claim 1, characterized in that: The anchor core (2) is a solid smooth steel bar or a threaded steel bar, and the sleeve (1) is an iron pipe or a steel pipe that has been treated with anti-corrosion.

5. The pressure anchor with recoverable anchor core according to claim 1, characterized in that: At least one centering bracket (6) is also fixedly arranged on the outer periphery of the sleeve (1), and when there are two or more centering brackets (6), the centering brackets (6) are arranged at intervals along the axial direction of the sleeve (1).

6. The pressure anchor with recoverable anchor core according to claim 1, characterized in that: The gap between the anchor core (2) and the casing (1) is filled with lubricant.

7. The pressure anchor with recoverable anchor core according to claim 1, characterized in that: A guide member (7) is fixedly connected to the bottom surface of the cylinder corresponding to the carrier (4) and facing away from the anchor core (2). The axis of the guide member (7) coincides with the axis of the carrier (4). The guide member (7) is divided into two sections, a column section (71) and a guide section (72). The column section (71) is in the shape of a cylinder or an annular column, and the guide section (72) is in the shape of a cone or a hemisphere. The diameter of the column section (71) is not greater than the diameter of the cylinder corresponding to the carrier (4). The bottom surface of the guide section (72) is equal in size to a bottom surface of the column section (71) and is fixedly connected or integral.

8. The pressure anchor with recoverable anchor core according to claim 1, characterized in that: A limiting ring (8) is also fixedly arranged at a position of the front end of the anchor core (2) close to the clamping plate (5).

9. The pressure anchor with recoverable anchor core according to any one of claims 1 to 8, characterized in that: The carrier (4) is also fixedly provided with a limiting column (9) that abuts against the blades of the clamping plate (5), and there is at least one limiting column (9).

10. The pressure anchor with retrievable anchor core according to claim 9, characterized in that: The carrier (4) is provided with two limiting columns (9); when the blade abuts against one of the limiting columns (9), the clamping plate (5) at the front end of the anchor core (2) is aligned with the orifice section of the through hole or blind hole of the carrier (4); when the blade abuts against the other limiting column (9), the clamping plate (5) at the front end of the anchor core (2) is misaligned with the orifice section of the through hole or blind hole of the carrier (4).

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