Extended sleeve type tool anchor device suitable for deeply-buried anchor prestress tensioning

Abstract

The invention belongs to the field of deep-buried anchor sleeve prestress construction, and particularly relates to an extension sleeve type tool anchor device suitable for deep-buried anchor prestress tensioning, which comprises a tool anchorage device, an extension sleeve and a first arc-shaped baffle plate, one ends of the first arc-shaped baffles are fixedly connected with the extension sleeve, the other ends of the first arc-shaped baffles are fixedly connected with the tool anchorage device and extend out of the outer wall of the concrete, the first arc-shaped baffles are evenly distributed on the outer wall face of the end, facing the deeply-buried anchor sleeve, of the extension sleeve in the circumferential direction, and rotating rods distributed in a parallelogram shape are arranged between the first arc-shaped baffles and the extension sleeve; the top end of the rotating rod always faces the deeply-buried anchor sleeve, and the outer arc face of the first arc-shaped baffle can be attached to the inner wall face of the deeply-buried anchor sleeve. The deep-buried anchor sleeve has the advantages that enough operation space is provided for equipment such as the jack, and the problem that the working space of the jack is insufficient due to the fact that the deep-buried anchor sleeve is buried into concrete deeply and the included angle is small is solved.

Description

Technical Field

[0001] The invention belongs to the field of deep-buried anchor prestressing construction; specifically, the invention relates to an extended sleeve type tool anchor device suitable for deep-buried anchor prestressing tensioning. Background Art

[0002] With the advancement of bridge technology, the application of large-span concrete has made the span of bridges larger and larger. On the one hand, it is mainly due to the use of bridge prestressing technology, which has increased the strength of concrete several times. In the construction of deep-buried anchor prestressing, due to the deep depth of the anchor buried in the concrete and the small angle, the anchor end will be tensioned, which will cause the concrete structure to be damaged, and the tensioning equipment such as jacks will face the problem of insufficient working space and difficulty in removing the tool anchor ring. This not only increases the difficulty of construction, but may also affect the safety and efficiency of the tensioning operation. Summary of the invention

[0003] In view of this, the present invention provides an extended sleeve type tool anchor device suitable for prestressing of deep buried anchors, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.

[0004] In order to achieve the aforementioned objectives, the present invention provides an extended sleeve type tool anchor device suitable for prestressing of deep buried anchors, comprising a tool anchor, an extension sleeve and a first arc-shaped baffle, one end of the extension sleeve is inserted into the deep buried anchor sleeve, and the other end is fixedly connected to the tool anchor and extends beyond the outer wall of the concrete, the first arc-shaped baffle is provided in plurality, and is evenly distributed in the circumferential direction on the outer wall surface of the extension sleeve facing one end of the deep buried anchor sleeve, a rotating rod distributed in a parallelogram shape is provided between the first arc-shaped baffle and the extension sleeve, the top end of the rotating rod is always facing the deep buried anchor sleeve, and the outer arc surface of the first arc-shaped baffle can fit with the inner wall surface of the deep buried anchor sleeve.

[0005] In an extended sleeve type tool anchor device suitable for prestressing of deep buried anchors as described above, optionally, through grooves evenly distributed in the circumferential direction are opened on the outer wall surface of the extended sleeve, and the number of the through grooves corresponds to the number of the first arc-shaped baffles. The bottom of the rotating rod distributed in a parallelogram is rotatably installed in the through groove and is located at one end of the through groove facing the deep buried anchor sleeve. An extension block is provided at the bottom of the first arc-shaped baffle, and the top of the rotating rod is rotatably installed on both sides of the extension block. The front end of the first arc-shaped baffle is provided with a block that can be extended and retracted in the axial direction of the extended sleeve.

[0006] In an extended sleeve type tool anchor device suitable for prestressing of deep-buried anchors as described above, optionally, the outer surface of the extended sleeve is provided with second arc-shaped baffles evenly distributed in the circumferential direction, and a lifting plate is provided at one end of the second arc-shaped baffle facing the deep-buried anchor sleeve, and the lifting plate can contact the extension block, and the other end of the second arc-shaped baffle is located on the outside of the tool anchor.

[0007] In an extended sleeve type tool anchor device suitable for prestressing of deep buried anchors as described above, optionally, a sliding plate is slidably arranged in the through groove, the second arc-shaped baffle plate is arranged on the top of the sliding plate, the inner wall surface of the second arc-shaped baffle plate is fitted with the outer wall surface of the extension sleeve, an extension plate is fixedly arranged at one end of the sliding plate facing the first arc-shaped baffle plate, a telescopic tube is arranged on the top of the extension plate, the other end of the telescopic tube is slidably connected to the lifting plate, and a spring is arranged between the extension plate and the lifting plate.

[0008] In an extended sleeve-type tool anchor device suitable for prestressing of deep-buried anchors as described above, optionally, an outer ring reserved hole and an inner ring reserved hole are provided on the tool anchor, and the outer ring reserved hole is an opening and closing structure that can be expanded and shrunk, and an arc-shaped clamping block is slidably arranged in the outer ring reserved hole.

[0009] In an extended sleeve-type tool anchor device suitable for prestressing of deep-buried anchors as described above, optionally, telescopic rods are provided on both sides of the arc-shaped clamping block, a spring is provided inside the telescopic rod, the outer circle reserved hole is a semicircular reserved hole, and the arc-shaped clamping block can form a complete reserved hole with the outer circle reserved hole.

[0010] In the extended sleeve-type tool anchor device suitable for prestressing of deep-buried anchors as described above, optionally, the outer top surface of the arc-shaped clamping block is fixedly connected with a protrusion, which passes through the tool anchor and is arranged between two adjacent second arc-shaped baffles.

[0011] In an extended sleeve-type tool anchor device suitable for prestressing of deep-buried anchors as described above, optionally, a connecting block is fixedly arranged between two adjacent second arc-shaped baffles, and the connecting block is located on the side of the second arc-shaped baffle away from the deep-buried anchor sleeve, and the protrusion is located between the deep-buried anchor sleeve and the connecting block.

[0012] In an extended sleeve type tool anchor device suitable for prestressing of deep buried anchors as described above, optionally, the end face of the extension plate facing the deep buried anchor sleeve can be flush with the end face of the extension sleeve facing the deep buried anchor sleeve, and the end face of the second arc-shaped baffle away from the deep buried anchor sleeve can be flush with the end face of the tool anchor away from the deep buried anchor sleeve.

[0013] The invention discloses an extended sleeve type tool anchor device suitable for prestressing of deep-buried anchors. The radial dimension of the extended sleeve is smaller than that of the deep-buried anchor sleeve, so that installation and removal are convenient without interfering with the internal structure of concrete. The axial length of the extended sleeve is greater than that of the deep-buried anchor sleeve, so as to ensure that the extended sleeve can completely cover and extend beyond the outer wall of the concrete, thereby providing sufficient operating space for equipment such as jacks.

[0014] The parallelogram rotating rod structure enables the first arc-shaped baffle to expand and fix the extension sleeve in the deep-buried anchor sleeve, and when the inner diameter of the deep-buried anchor sleeve changes, it adapts to its radial change, so that one end surface of the extension sleeve is always close to the deep-buried anchor sleeve;

[0015] When the prestressed steel bar is initially inserted, the outer ring reserved hole and the inner ring reserved hole are both larger than the diameter of the prestressed steel bar, which is convenient for inserting the prestressed steel bar. After the extension sleeve is inserted into the deep-buried anchor sleeve, the expansion force of the first arc-shaped baffle plate can be more stable as the second arc-shaped baffle plate is pushed in, and the outer ring reserved hole is reduced to reduce the shaking of the prestressed steel bar. At the same time, the end of the lifting plate contacts the deep-buried anchor sleeve, increasing the contact area of ​​the extension baffle plate with the deep-buried anchor sleeve, so that the extension sleeve is more stable during the subsequent tensioning operation.

[0016] After the tensioning operation is completed, the extension sleeve only needs to be pulled out to complete the separation of the extension sleeve and the deep-buried anchor sleeve, completing the disassembly and facilitating subsequent recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The disclosure of the present invention will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0018] Figure 1 It is a schematic diagram of the extension sleeve of the present invention being inserted into the deep-buried anchor sleeve before expansion.

[0019] Figure 2 For the present invention Figure 1 Schematic diagram of the internal structure of the deep buried anchor sleeve.

[0020] Figure 3 For the present invention Figure 2 Schematic diagram from another perspective.

[0021] Figure 4 It is a schematic diagram of the extension sleeve of the present invention when it is inserted into the deep-buried anchor sleeve and expanded.

[0022] Figure 5 It is a schematic diagram of the connection structure of the first arc-shaped baffle of the present invention when it is not expanded.

[0023] Figure 6 It is a schematic diagram of the connection structure of the first arc-shaped baffle of the present invention when it is expanded.

[0024] Figure 7 It is a schematic diagram of the tool anchor connection structure of the present invention.

[0025] Figure numerals: 1. tool anchor; 2. extension sleeve; 3. first arc-shaped baffle; 4. rotating rod; 5. through groove; 6. extension block; 7. baffle; 8. second arc-shaped baffle; 9. lifting plate; 10. sliding plate; 11. extension plate; 12. telescopic tube; 13. outer circle reserved hole; 14. inner circle reserved hole; 15. arc-shaped clamping block; 16. telescopic rod; 17. protrusion; 18. connecting block; 19. deep buried anchor sleeve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 7 As shown, a typical embodiment of the present invention provides an extended sleeve type tool anchor device suitable for prestressing of deep buried anchors, including a tool anchor 1, an extended sleeve 2 and a first arc-shaped baffle 3, one end of the extended sleeve 2 is inserted into the deep buried anchor sleeve 19, and the other end is fixedly connected to the tool anchor 1 and extends beyond the outer wall of the concrete, a plurality of first arc-shaped baffles 3 are provided, and are evenly distributed in the circumferential direction on the outer wall surface of the extended sleeve 2 facing one end of the deep buried anchor sleeve 19, a rotating rod 4 distributed in a parallelogram shape is provided between the first arc-shaped baffle 3 and the extended sleeve 2, the top end of the rotating rod 4 always faces the deep buried anchor sleeve 19, and the outer arc surface of the first arc-shaped baffle 3 can fit with the inner wall surface of the deep buried anchor sleeve 19.

[0028] In this embodiment, the radial dimension of the extension sleeve 2 is smaller than the radial dimension of the deep-buried anchor sleeve 19, which is convenient for installation and removal without interfering with the internal structure of the concrete. The axial length of the extension sleeve 2 is greater than the axial length of the deep-buried anchor sleeve 19 to ensure that the extension sleeve 2 can completely cover and extend beyond the outer wall of the concrete. The extension sleeve 2 and the tool anchor 1 are fixed as a whole to ensure stability and reliability during the tensioning process.

[0029] The prestressed tendons are passed through the working anchor in the deep-buried anchor sleeve 19 one by one, and then the working anchor is pushed in along the reserved channel and tightly attached to the anchor pad, the working clip is installed, and then the prestressed steel bars are aligned with the reserved holes of the tool anchor 1 on the extension sleeve 2 and passed through one by one, so that the extension sleeve 2 can be inserted into the deep-buried anchor sleeve 19. When the end face of the first arc-shaped baffle plate 3 at the top of the extension sleeve 2 contacts the inner end face of the deep-buried anchor sleeve 19, the parallelogram-shaped rotating rod 4 rotates upward, driving the first arc-shaped baffle plate 3 to rotate upward until its top arc surface contacts and fits with the inner wall surface of the deep-buried anchor sleeve 19, so that the extension sleeve 2 can be aligned with the deep-buried anchor sleeve 19. During the subsequent tensioning operation, the pressure of the jack can make the extension sleeve 2 more stably in the centered state and continue to apply tensioning force to the deep-buried anchor sleeve 19.

[0030] The outer wall surface of the extension sleeve 2 is provided with through grooves 5 evenly distributed in the circumferential direction, and the number of the through grooves 5 corresponds to the number of the first arc-shaped baffles 3. The bottom of the rotating rod 4 distributed in a parallelogram is rotatably installed in the through groove 5 and is located at one end of the through groove 5 facing the deeply buried anchor sleeve 19. An extension block 6 is provided at the bottom of the first arc-shaped baffle 3, and the top of the rotating rod 4 is rotatably installed on both sides of the extension block 6. The front end of the first arc-shaped baffle 3 is provided with a block 7 that can be extended and retracted in the axial direction of the extension sleeve 2.

[0031] In this embodiment, the first arc baffle plate 3 contacts the deep buried anchor sleeve 19, so that the first arc baffle plate 3 rotates until the arc surface of its top surface is in contact with the inner wall surface of the deep buried anchor sleeve 19. Since the radial lengths of the inner wall surfaces of different deep buried anchor sleeves 19 may be inconsistent, the rotation angle of the first arc baffle plate 3 may be inconsistent. When the first arc baffle plate 3 is close to the inner wall surface of the deep buried sleeve, the end surface of the extension sleeve 2 facing the deep buried anchor sleeve 19 cannot contact the deep buried anchor sleeve 19; the stopper 7 at the front end of the first arc baffle plate 3 is set to a retractable structure so that when the first arc baffle plate 3 is in contact with the inner wall surface of the deep buried anchor sleeve 19, the stopper 7 is compressed, and the end surface of the extension sleeve 2 facing the deep buried anchor sleeve 19 can contact the deep buried anchor sleeve 19, so that during the subsequent tensioning operation, the tensioning force can be stably transmitted.

[0032] The outer surface of the extension sleeve 2 is provided with second arc-shaped baffles 8 evenly distributed in the circumferential direction. A lifting plate 9 is provided at one end of the second arc-shaped baffle 8 facing the deep-buried anchor sleeve 19. The lifting plate 9 can contact the extension block 6. The other end of the second arc-shaped baffle 8 is located on the outside of the tool anchor 1.

[0033] In this embodiment, a slope is provided on the side of the extension block 6 facing the lifting plate 9. When the second arc-shaped baffle plate 8 is pushed to slide toward the side of the deep-buried anchor sleeve 19, the lifting plate 9 contacts the slope of the extension block 6. Since the first arc-shaped baffle plate 3 fits the inner wall surface of the deep-buried anchor sleeve 19 and will not deflect, the extension block 6 can squeeze the lifting plate 9 so that the lifting plate 9 slides downward until the top surface of the lifting plate 9 contacts the bottom surface of the extension block 6. At this time, the lifting plate 9 can stably slide toward the direction of the deep-buried anchor sleeve 19 until the end surface of the front end of the lifting plate 9 contacts the inner end surface of the deep-buried anchor sleeve 19, thereby increasing the contact area between the extension sleeve 2 and the deep-buried anchor sleeve 19, which can make the tensioning process more stable during subsequent tensioning operations.

[0034] A sliding plate 10 is slidably arranged in the through groove 5, and the second arc-shaped baffle plate 8 is arranged on the top of the sliding plate 10. The inner wall surface of the second arc-shaped baffle plate 8 is fitted with the outer wall surface of the extension sleeve 2. An extension plate 11 is fixedly arranged at one end of the sliding plate 10 facing the first arc-shaped baffle plate 3. A telescopic tube 12 is arranged on the top of the extension plate 11. The other end of the telescopic tube 12 is slidably connected to the lifting plate 9, and a spring is arranged between the extension plate 11 and the lifting plate 9.

[0035] In this embodiment, when the extension sleeve is inserted into the deep-buried anchor sleeve 19, the first arc-shaped baffle plate 3 expands to fit the inner wall surface of the deep-buried anchor sleeve 19, and then the second arc-shaped baffle plate 8 is pushed to slide toward one side of the deep-buried anchor sleeve 19, and the lifting plate 9 contacts the inclined surface of the extension block 6 so that the lifting plate 9 slides downward, so that the spring between the extension plate 11 inside the telescopic tube 12 and the lifting plate 9 is squeezed; when the lifting plate 9 slides downward and is located at the bottom surface of the extension plate 11, the lifting plate 9 always has an upward thrust on the extension plate 11, so that the expansion force of the first arc-shaped baffle plate 3 remains stable and does not increase during the subsequent tensioning operation.

[0036] The tool anchor 1 is provided with an outer ring reserved hole 13 and an inner ring reserved hole 14 . The outer ring reserved hole 13 is an open-close structure that can be expanded and shrunk. An arc-shaped clamping block 15 is slidably arranged in the outer ring reserved hole 13 .

[0037] In this embodiment, the inner circle reserved hole 14 is larger than the diameter of the prestressed steel bar, which is convenient for the inner circle reserved hole 14 of the prestressed steel bar to be inserted, and the outer circle reserved hole 13 can be opened and closed. When the prestressed steel bar is inserted, the outer circle reserved hole 13 is in an open state, which is convenient for the prestressed steel bar to be inserted into the outer circle reserved hole 13; when the extension sleeve 2 is inserted into the deep buried anchor sleeve 19, the first arc-shaped baffle plate 3 expands to fit the inner wall surface of the deep buried anchor sleeve 19, the outer circle reserved hole 13 can be closed, and the outer circle reserved hole 13 is reduced, thereby fixing the prestressed steel bar and reducing the shaking of the prestressed steel bar during subsequent construction, thereby avoiding affecting the subsequent construction.

[0038] Telescopic rods 16 are arranged on both sides of the arc-shaped clamping block 15 , and springs are arranged inside the telescopic rods 16 . The outer ring reserved hole 13 is a semicircular reserved hole, and the arc-shaped clamping block 15 can form a complete reserved hole with the outer ring reserved hole 13 .

[0039] In this embodiment, the arc-shaped clamp block 15 can keep the hole of the outer ring reserved hole 13 in an expanded state when the prestressed steel bar is not inserted, so as to facilitate the prestressed steel bar to pass through the outer ring reserved hole 13; after the prestressed steel bar passes through the outer ring reserved hole 13, the arc-shaped clamp block 15 slides inward and docks with the outer ring reserved hole 13, so that the hole of the outer ring reserved hole 13 is reduced, reducing the shaking of the prestressed steel bar and facilitating subsequent construction.

[0040] A protrusion 17 is fixedly connected to the outer top surface of the arc-shaped clamping block 15 . The protrusion 17 passes through the tool anchor 1 and is arranged between two adjacent second arc-shaped baffles 8 .

[0041] In this embodiment, the extrusion protrusion 17 can cause the arc clamping block 15 to slide inward, so that the outer ring reserved hole 13 is reduced. When the arc clamping block 15 is reset, the arc clamping block 15 slides outward, so that the protrusion 17 passes through the outer surface of the tool anchor 1 and is located between two adjacent second arc baffles 8.

[0042] A connecting block 18 is fixedly provided between two adjacent second arc-shaped baffles 8 , and the connecting block 18 is located on a side of the second arc-shaped baffle 8 away from the deep-buried anchor sleeve 19 , and the protrusion 17 is located between the deep-buried anchor sleeve 19 and the connecting block 18 .

[0043] In this embodiment, when the extension sleeve 2 is inserted into the deep buried anchor sleeve 19 so that the first arc baffle 3 expands to fit the inner wall surface of the deep buried anchor sleeve 19, the second arc baffle 8 extends away from one end of the deep buried anchor sleeve 19 to the outside of the tool anchor 1, and the outer circle reserved hole 13 is in an expanded state. The protrusion 17 is located between two adjacent second arc baffles 8. At this time, the second arc baffle 8 is pushed so that the connecting block 18 approaches the protrusion 17, and the connecting plate contacts the protrusion 17. The connecting plate squeezes the top inclined surface of the protrusion 17, so that the protrusion 17 slides inward and drives the arc clamping block 15 to slide inward. The outer circle reserved hole 13 is reduced, and the prestressed steel bar is clamped, so as to achieve the effect of fixing the prestressed steel bar in the process of pushing the second arc baffle 8 to make the lifting plate 9 contact with the deep buried anchor sleeve 19.

[0044] The end surface of the extension plate facing the deep buried anchor sleeve 19 can be flush with the end surface of the extension sleeve 2 facing the deep buried anchor sleeve 19, and the end surface of the second arc-shaped baffle plate 8 away from the deep buried anchor sleeve 19 can be flush with the end surface of the tool anchor 1 away from the deep buried anchor sleeve 19.

[0045] In this embodiment, when the lifting plate 9 contacts the deep buried anchor sleeve 19 and increases the contact area with the deep buried anchor sleeve 19, the end face of the second arc-shaped baffle plate 8 away from the deep buried anchor sleeve 19 is flush with the outer end face of the tool anchor 1, so that the second arc-shaped baffle plate 8 and the tool anchor 1 form a whole, so that during the subsequent tensioning operation, a transition gasket can be installed on the outer end face of the tool anchor 1, and then the tool clip is installed, and the jack is aligned and engaged with the transition gasket. After that, the anchor and the tool clip are installed at the other end of the jack to complete the tensioning preparation; during the tensioning operation, the first arc-shaped baffle plate 3 always maintains the expansion force on the deep buried anchor sleeve 19 to keep the extension sleeve 2 stable. After the tensioning operation is completed, the transition gasket is withdrawn, and only the extension sleeve 2 needs to be pulled out to complete the disassembly of the extension sleeve 2, which is convenient for subsequent recycling.

[0046] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above implementation without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the scope of the present invention.

Claims

1. An extended sleeve type tool anchor device suitable for prestressing of deep buried anchors, characterized in that: The invention comprises a tool anchor (1), an extension sleeve (2) and a first arc-shaped baffle (3); one end of the extension sleeve (2) is inserted into a deep-buried anchor sleeve (19), and the other end is fixedly connected to the tool anchor (1) and extends beyond the outer wall of the concrete; a plurality of the first arc-shaped baffles (3) are arranged and are evenly distributed in the circumferential direction on the outer wall surface of the extension sleeve (2) facing the deep-buried anchor sleeve (19); a rotating rod (4) distributed in a parallelogram shape is arranged between the first arc-shaped baffle (3) and the extension sleeve (2); the top end of the rotating rod (4) always faces the deep-buried anchor sleeve (19); and the outer arc surface of the first arc-shaped baffle (3) can fit the inner wall surface of the deep-buried anchor sleeve (19).

2. An extended sleeve type tool anchor device suitable for prestressing of deep buried anchors as claimed in claim 1, characterized in that: The outer wall surface of the extension sleeve (2) is provided with through grooves (5) evenly distributed in the circumferential direction, the number of the through grooves (5) corresponds to the number of the first arc-shaped baffles (3), the bottom of the rotating rod (4) distributed in a parallelogram is rotatably mounted in the through groove (5) and is located at one end of the through groove (5) facing the deep-buried anchor sleeve (19), an extension block (6) is provided at the bottom of the first arc-shaped baffle (3), the top of the rotating rod (4) is rotatably mounted on both sides of the extension block (6), and a stop block (7) that can be extended and retracted in the axial direction of the extension sleeve (2) is provided at the front end of the first arc-shaped baffle (3).

3. An extended sleeve type tool anchor device suitable for prestressing of deep buried anchors as claimed in claim 2, characterized in that: The outer surface of the extension sleeve (2) is provided with second arc-shaped baffles (8) evenly distributed in the circumferential direction, and one end of the second arc-shaped baffle (8) facing the deep-buried anchor sleeve (19) is provided with a lifting plate (9), and the lifting plate (9) can contact the extension block (6), and the other end of the second arc-shaped baffle (8) is located outside the tool anchor (1).

4. An extended sleeve type tool anchor device suitable for prestressing of deep buried anchors as claimed in claim 3, characterized in that: A sliding plate (10) is slidably arranged in the through groove (5), the second arc-shaped baffle plate (8) is arranged on the top of the sliding plate (10), the inner wall surface of the second arc-shaped baffle plate (8) is in contact with the outer wall surface of the extension sleeve (2), an extension plate (11) is fixedly arranged at one end of the sliding plate (10) facing the first arc-shaped baffle plate (3), a telescopic tube (12) is arranged on the top of the extension plate (11), the other end of the telescopic tube (12) is slidably connected to the lifting plate (9), and a spring is arranged between the extension plate (11) and the lifting plate (9).

5. The extended sleeve type tool anchor device suitable for prestressing of deep buried anchors as claimed in claim 3, characterized in that: The tool anchor (1) is provided with an outer ring reserved hole (13) and an inner ring reserved hole (14); the outer ring reserved hole (13) is an open-close structure that can be expanded and shrunk; an arc-shaped clamping block (15) is slidably arranged in the outer ring reserved hole (13).

6. An extended sleeve type tool anchor device suitable for prestressing of deep buried anchors as claimed in claim 5, characterized in that: Telescopic rods (16) are arranged on both sides of the arc-shaped clamping block (15), and springs are arranged inside the telescopic rods (16). The outer ring reserved hole (13) is a semicircular reserved hole, and the arc-shaped clamping block (15) can form a complete reserved hole with the outer ring reserved hole (13).

7. An extended sleeve type tool anchor device suitable for prestressing of deep buried anchors as claimed in claim 6, characterized in that: A protrusion (17) is fixedly connected to the outer top surface of the arc-shaped clamping block (15); the protrusion (17) passes through the tool anchor (1) and is arranged between two adjacent second arc-shaped baffles (8).

8. An extended sleeve type tool anchor device suitable for prestressing of deep buried anchors as claimed in claim 7, characterized in that: A connecting block (18) is fixedly arranged between two adjacent second arc-shaped baffles (8), and the connecting block (18) is located on a side of the second arc-shaped baffle (8) away from the deep-buried anchor sleeve (19), and the protrusion (17) is located between the deep-buried anchor sleeve (19) and the connecting block (18).

9. An extended sleeve type tool anchor device suitable for prestressing of deep buried anchors as claimed in claim 8, characterized in that: The end surface of the extension plate (11) facing the deep-buried anchor sleeve (19) can be flush with the end surface of the extension sleeve (2) facing the deep-buried anchor sleeve (19), and the end surface of the second arc-shaped baffle plate (8) away from the deep-buried anchor sleeve (19) can be flush with the end surface of the tool anchor (1) away from the deep-buried anchor sleeve (19).

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