Novel portable dismounting device for anchor bolt

Abstract

The utility model discloses a portable novel anchor bolt dismounting device which comprises a mounting sleeve, a nut dismounting mechanism used for dismounting a nut on an anchor bolt, and an expansion pipe dismounting mechanism used for dismounting an expansion pipe on the side wall of the mounting sleeve, and a screwdriver head is fixedly arranged on the mounting sleeve, and a first bolt is arranged on the side wall of the mounting sleeve in a penetrating mode. The nut dismounting mechanism and the expansion pipe dismounting mechanism are used for dismounting an expansion pipe on an anchor bolt, the mounting end of the nut dismounting mechanism and the mounting end of the expansion pipe dismounting mechanism are each provided with a plug matched with the mounting sleeve, the expansion pipe dismounting mechanism comprises a first fixing pipe, and a second fixing pipe and a third fixing pipe are fixedly arranged in the first fixing pipe; the second fixing pipe extends out of the first fixing pipe, and the problem that in the prior art, the dismounting efficiency of anchor bolts of different specifications is low is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor bolt disassembly, in particular to a new type of convenient anchor bolt disassembly device. Background Art

[0002] Anchor bolts refer to the general term for all post-anchoring components. They have a wide range and are divided into metal anchor bolts and non-metal anchor bolts according to different raw materials. They are divided into expansion anchor bolts, expansion hole anchor bolts, bonding anchor bolts, concrete screws, nails, concrete nails, etc. according to different anchoring mechanisms. Anchor bolts are mostly used to fix large-scale power and electrical equipment, mainly used to install equipment on the ground or wall.

[0003] In the field of nuclear power, since the installation requirements of nuclear power equipment on the concrete foundation are high and strong installation stability is required, the anchor bolts used in the installation of nuclear power equipment are relatively high. In practice, there are also supporting anchor bolts suitable for the installation of nuclear power equipment in the nuclear power field. However, after the anchor bolts are installed, due to different installation positions or inaccurate installation positions, as well as changes in the position of nuclear power equipment, the anchor bolts often need to be removed after installation. To remove the anchor bolts, first remove the nuts tightened on them, and then use a pulling tool, such as a clamp to pull out the expansion tube on the anchor bolt. However, since the outer surface of the expansion tube is round and there is no good force application point, it is difficult for the clamp to pull out the expansion tube. Therefore, it is generally pulled out by destroying the concrete foundation, that is, by enlarging the installation hole, which damages the use strength of the concrete foundation. Therefore, in order to facilitate force application, an L-shaped hook groove is set on the outermost side wall of the expansion tube during production, such as Figure 8 As shown, use the clamping pliers to hook the L-shaped hook groove and pull it out.

[0004] Although the problem of the force application point on the expansion tube is solved, since the expansion tube has already expanded in the concrete base, it is still time-consuming and laborious to pull it out directly. Therefore, a new type of convenient anchor bolt disassembly device is proposed in combination with the existing anchor bolt and expansion tube structure. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies of the prior art, the utility model provides a novel and convenient anchor bolt disassembly device to solve the problem of low anchor bolt disassembly efficiency in the prior art mentioned in the background art.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of convenient anchor bolt disassembly device, comprising an installation sleeve, a screwdriver bit is fixedly arranged on the installation sleeve, a first bolt is penetrated through the side wall of the installation sleeve, and a nut disassembly mechanism is used to disassemble the nut on the anchor bolt, and an expansion tube disassembly mechanism is used to disassemble the expansion tube on the anchor bolt, wherein the installation ends of the nut disassembly mechanism and the expansion tube disassembly mechanism are both provided with plugs matching the installation sleeve, wherein the expansion tube disassembly mechanism comprises a first fixed tube, and a second fixed tube is fixedly arranged inside the first fixed tube. A fixing tube and a third fixing tube, the second fixing tube extends out of the first fixing tube, the inner wall of the third fixing tube is provided with an internal thread, a bolt rod is provided in the third fixing tube through threaded cooperation, the bolt rod extends into the second fixing tube, two L-shaped fixing heads are fixedly provided on the second fixing tube, a fixing through groove is provided on the side wall of the second fixing tube at one side of the fixing head, a fixing block is slidably provided in the fixing through groove, a fixing spring is fixedly provided in the fixing through groove and between the fixing block, a fixing ring is fixedly provided on the second fixing tube, and the fixing ring is fixedly connected to the fixing block.

[0009] Preferably, the nut removal mechanism comprises:

[0010] Drive seat;

[0011] A driving groove, the driving groove is arranged on the driving seat;

[0012] Positioning grooves, three of which are provided on the side wall of the driving groove;

[0013] A positioning block, the positioning block is arranged in the positioning groove;

[0014] A position adjustment mechanism is arranged in the positioning groove and is used to control the positioning block to adjust the position.

[0015] Furthermore, the position adjustment mechanism comprises:

[0016] A positioning plate, wherein two positioning plates are hingedly provided between each positioning block and the bottom of the positioning groove;

[0017] a first positioning through hole, wherein the first positioning through hole is disposed on the positioning plate;

[0018] A second positioning through hole, wherein the second positioning through holes are respectively formed on two side walls of the positioning plate opposite to the first positioning through hole;

[0019] A driving block, wherein the driving block is disposed in the first positioning through hole;

[0020] A driving column, a plurality of the driving columns are fixedly arranged on the driving block;

[0021] Wherein, the driving column corresponds to the second positioning through hole one by one, and the driving column extends into the second positioning through hole;

[0022] A moving mechanism, the moving mechanism is arranged in the driving seat and is used to control the driving block to move;

[0023] A supporting groove, wherein the supporting groove is provided on the driving block;

[0024] A support column is fixedly arranged on each side wall of the positioning groove, and the support column extends into the support groove and is slidably connected with the side wall of the support groove.

[0025] Furthermore, the moving mechanism includes:

[0026] A first cavity, three of which are provided in the driving seat, and a positioning opening is provided between the first cavity and the positioning groove;

[0027] a threaded tube, the threaded tube being rotatably disposed in the first cavity;

[0028] A threaded rod, wherein the threaded rod is arranged in the positioning opening, one end of the threaded rod is fixedly connected to the driving block, and the other end of the threaded rod extends into the threaded tube through threaded engagement;

[0029] A synchronous rotation mechanism is arranged on the driving seat and is used to control the three threaded tubes to rotate synchronously.

[0030] Furthermore, the synchronous rotation mechanism includes:

[0031] an annular groove, the annular groove is formed on the side wall of the driving seat, and the annular groove is connected to the first cavity;

[0032] A first gear, wherein a mounting opening is provided on the first gear, the first gear is sleeved on the threaded tube through the mounting opening, and the first gear is fixedly connected to the threaded tube;

[0033] a drive ring, the drive ring being disposed in the annular groove;

[0034] an annular rack, the annular rack being fixedly disposed on the inner wall of the driving ring and meshing with the first gear;

[0035] A limiting mechanism is arranged on the driving ring and is used to limit the rotation angle of the driving ring.

[0036] On the basis of the above solution, the limiting mechanism includes:

[0037] A limiting column, wherein the limiting column is fixedly arranged on the side wall of the annular groove;

[0038] Limiting grooves, a plurality of the limiting grooves are provided on the side wall of the driving ring, and the limiting grooves are adapted to the shape of the limiting posts;

[0039] Support springs, a plurality of support springs are fixedly arranged on the drive ring, and the support springs are in contact with the side walls of the annular groove.

[0040] (III) Beneficial effects

[0041] Compared with the prior art, the utility model provides a new type of convenient anchor bolt disassembly device, which has the following beneficial effects:

[0042] 1. In the utility model, through the setting of the expansion tube disassembly mechanism, the fixing block can be retracted into the fixing groove by pulling the fixing ring, and then the operator extends the fixing head into the hook groove on the expansion tube, and then the operator loosens the fixing ring, so that the fixing block extends into the hook groove under the action of the fixing spring, so that the fixing head can be fixed in the hook groove, and then the operator fixes the installation sleeve on the drilling rig through the screwdriver, and then fixes the plug on the bolt rod in the installation sleeve through the first bolt, and at the same time, the bolt rod can be driven to rotate through the operation of the drilling rig. During the rotation of the bolt rod, the bolt rod can be driven to move by cooperating with the thread of the third fixing tube, and then pressure is applied to the anchor rod by the bolt rod, so that the first fixing tube and the second fixing tube can be driven to move in the opposite direction by the reaction force, and then the expansion tube can be pulled by the cooperation of the fixing head and the hook groove, so that the expansion tube can be pulled out of the drill hole;

[0043] 2. In the utility model, by setting the position adjustment mechanism, it is convenient to clamp the nut by moving the positioning block, and then the driving seat and the nut are controlled to rotate by the operation of the electric wrench, so as to facilitate the removal of the anchor bolt;

[0044] 3. In the utility model, by setting up the nut disassembly mechanism and the expansion tube disassembly mechanism, it is convenient to remove the nut and then pull the expansion tube out of the drill hole through the cooperation between the fixed head and the hook groove, thereby solving the problem of low efficiency in anchor bolt disassembly in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of the sleeve and nut removal mechanism structure is provided for this application;

[0046] Figure 2 This is a schematic diagram of the nut removal mechanism structure of this application;

[0047] Figure 3This is a schematic diagram of the cross-sectional structure of the nut removal mechanism of this application;

[0048] Figure 4 This is a schematic diagram of the position adjustment mechanism structure of this application;

[0049] Figure 5 This is a schematic diagram of the expansion tube disassembly mechanism structure of this application;

[0050] Figure 6 This is a schematic diagram of the cross-sectional structure of the expansion tube disassembly mechanism of the present application;

[0051] Figure 7 This is a schematic diagram of the matching structure of the fixed head and the hook groove in this application;

[0052] Figure 8 This is a schematic diagram of the anchor bolt structure in the position of this application.

[0053] In the figure: 1. first fixed tube; 2. mounting block; 3. driving seat; 4. driving groove; 5. positioning groove; 6. positioning block; 7. mounting sleeve; 8. first bolt; 9. positioning plate; 10. first positioning through hole; 11. second positioning through hole; 12. driving block; 13. driving column; 14. supporting groove; 15. supporting column; 16. threaded tube; 17. threaded rod; 18. annular groove; 19. first gear; 20. driving ring; 21. annular rack; 22. limiting column; 23. limiting groove; 24. supporting spring; 25. second fixed tube; 26. third fixed tube; 27. bolt rod; 28. fixing head; 29. ​​fixing ring. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0055] See also Figures 1 to 8A new type of convenient anchor bolt disassembly device, comprising an installation sleeve 7, a screwdriver bit is fixedly arranged on the installation sleeve 7, a first bolt 8 is penetrated on the side wall of the installation sleeve 7, and a nut disassembly mechanism is used to disassemble the nut on the anchor bolt, and an expansion tube disassembly mechanism is used to disassemble the expansion tube on the anchor bolt, wherein the installation ends of the nut disassembly mechanism and the expansion tube disassembly mechanism are both provided with plugs matching the installation sleeve 7, wherein the expansion tube disassembly mechanism comprises a first fixed tube 1, a second fixed tube 25 and a third fixed tube 26 are fixedly arranged in the first fixed tube 1, and the second fixed tube 25 extends The first fixed tube 1 is extended out, the inner wall of the third fixed tube 26 is provided with an internal thread, a bolt rod 27 is provided in the third fixed tube 26 through threaded cooperation, the bolt rod 27 extends into the second fixed tube 25, two L-shaped fixed heads 28 are fixedly provided on the second fixed tube 25, a fixed through groove is provided on the side wall of the second fixed tube 25 at one side of the fixed head 28, a fixed block 30 is slidably provided in the fixed through groove, a fixed spring is fixedly provided in the fixed through groove and between the fixed block 30, a fixed ring 29 is fixedly provided on the second fixed tube 25, and the fixed ring 29 is fixedly connected to the fixed block 30.

[0056] Specifically, the operator pulls the fixing ring 29 to drive the fixing block 30 to retract into the fixing groove, and then the operator extends the fixing head 28 into the hook groove on the expansion tube. Then the operator loosens the fixing ring 29, so that the fixing block 30 extends into the hook groove under the action of the fixing spring, so that the fixing head 28 can be fixed in the hook groove. Then the operator fixes the installation sleeve 7 on the drilling rig through the screwdriver, and then fixes the plug on the bolt rod 27 in the installation sleeve 7 through the first bolt 8. At the same time, the operation of the drilling rig can drive the bolt rod 27 to rotate. During the rotation of the bolt rod 27, the bolt rod 27 can be driven to move by the thread cooperation with the third fixing tube 26. Then, pressure is applied to the anchor rod by the bolt rod 27, so that the first fixing tube 1 and the second fixing tube 25 can be driven to move in the opposite direction by the reaction force, and then the expansion tube can be pulled by the cooperation of the fixing head 28 and the hook groove, so that the expansion tube can be pulled out of the borehole.

[0057] Wherein, the nut disassembly mechanism includes a driving seat 3, a driving groove 4, a positioning groove 5, a positioning block 6 and a position adjustment mechanism, the driving groove 4 is opened on the driving seat 3, and three positioning grooves 5 are opened on the side wall of the driving groove 4, the positioning block 6 is arranged in the positioning groove 5, and the position adjustment mechanism is arranged in the positioning groove 5 for controlling the positioning block 6 to adjust the position, wherein the position adjustment mechanism includes a positioning plate 9, a first positioning through hole 10, a second positioning through hole 11, a driving block 12, a driving column 13, a moving mechanism, a supporting groove 14 and a supporting column 15, two positioning plates 9 are hingedly arranged between each positioning block 6 and the bottom of the positioning groove 5, the first positioning through hole 10 is opened on the positioning plate 9, and the second positioning through holes 11 are respectively opened on the two side walls of the positioning plate 9 opposite to the first positioning through hole 10, the driving block 12 is arranged in the first positioning through hole 10, and a fixed device is arranged on the driving block 12 A plurality of driving columns 13 are provided, wherein the driving columns 13 correspond to the second positioning through holes 11 one by one, and the driving columns 13 extend into the second positioning through holes 11; a moving mechanism is arranged in the driving seat 3, and is used to control the movement of the driving block 12; a supporting groove 14 is provided on the driving block 12; a supporting column 15 is fixedly arranged on the side wall of each positioning groove 5; the supporting column 15 extends into the supporting groove 14 and is slidably connected with the side wall of the supporting groove 14; the moving mechanism comprises a first cavity, a threaded tube 16, a threaded rod 17 and a synchronous rotation mechanism; three first cavities are provided in the driving seat 3, a positioning opening is provided between the first cavity and the positioning groove 5, the threaded tube 16 is rotatably arranged in the first cavity, the threaded rod 17 is arranged in the positioning opening, one end of the threaded rod 17 is fixedly connected to the driving block 12, and the other end of the threaded rod 17 extends into the threaded tube 16 through threaded cooperation; and a synchronous rotation mechanism is arranged on the driving seat 3, and is used to control the three threaded tubes 16 to rotate synchronously.

[0058] Specifically, the rotation of the threaded tube 16 can drive the threaded rod 17 and the driving block 12 to move through the cooperation between the threaded tube 16 and the threaded rod 17, and at the same time, the cooperation between the driving column 13 and the second positioning through hole 11 can drive the positioning plate 9 to be angularly offset, and then the positioning block 6 can be driven to move through the positioning plate 9, so that the nut can be clamped by the movement of the positioning block 6.

[0059] Among them, the synchronous rotation mechanism includes an annular groove 18, a first gear 19, a driving ring 20, an annular rack 21 and a limiting mechanism. The annular groove 18 is opened on the side wall of the driving seat 3, and the annular groove 18 is connected to the first cavity. A mounting port is opened on the first gear 19, and the first gear 19 is mounted on the threaded tube 16 through the mounting port. The first gear 19 is fixedly connected to the threaded tube 16. The driving ring 20 is arranged in the annular groove 18, and the annular rack 21 is fixedly arranged on the inner wall of the driving ring 20. The annular rack 21 is meshed with the first gear 19. The limiting mechanism is arranged on the driving ring 20 for limiting the rotation angle of the driving ring 20.

[0060] Specifically, the operator rotates the driving ring 20 , so that the three threaded tubes 16 can be driven to rotate synchronously through the meshing of the annular rack 21 and the first gear 19 .

[0061] Among them, the limiting mechanism includes a limiting column 22, a limiting groove 23 and a supporting spring 24. The limiting column 22 is fixedly arranged on the side wall of the annular groove 18, and a plurality of limiting grooves 23 are opened on the side wall of the driving ring 20. The limiting grooves 23 are adapted to the shape of the limiting column 22. A plurality of supporting springs 24 are fixedly arranged on the driving ring 20, and the supporting springs 24 are in contact with the side wall of the annular groove 18.

[0062] Specifically, the drive ring 20 can be pressed against the side wall of the bottom of the annular groove 18 under the action of the support spring 24, so that the limit column 22 can extend into the limit groove 23, and then the angle of the drive ring 20 is limited by the cooperation between the limit column 22 and the limit groove 23, thereby avoiding the position of the positioning block 6 from being offset due to accidental touch during use.

[0063] In summary, when the new type of convenient anchor bolt disassembly device is in use, the operator pulls the fixing ring 29 to drive the fixing block 30 to retract into the fixing groove, and then the operator extends the fixing head 28 into the hook groove on the expansion tube, and then the operator loosens the fixing ring 29, so that the fixing block 30 extends into the hook groove under the action of the fixing spring, so that the fixing head 28 can be fixed in the hook groove, and then the operator fixes the installation sleeve 7 to the drilling rig through the screwdriver, and then fixes the plug on the bolt rod 27 in the installation sleeve 7 through the first bolt 8. At the same time, the bolt rod 27 can be driven to rotate by the operation of the drilling rig. During the rotation of the bolt rod 27, the bolt rod 27 can be rotated by the third fixing screw. The threaded cooperation of the fixed tube 26 drives the bolt rod 27 to move, and then the bolt rod 27 applies pressure to the anchor rod, so that the reaction force can drive the first fixed tube 1 and the second fixed tube 25 to move in the opposite direction, and then the expansion tube is pulled by the cooperation of the fixed head 28 and the hook groove, so that the expansion tube can be pulled out of the drill hole, and then the operator removes the expansion tube disassembly mechanism from the installation sleeve 7 and extends the plug on the drive seat 3 into the installation sleeve 7 and fixes it with the first bolt 8, and then the operator moves the drive seat 3 so that the mounting block 2 extends into the mounting groove, and then the first bolt 8 can be passed through the first threaded hole through the threaded cooperation, so that the expansion tube can be pulled out of the drill hole. The drive seat 3 is installed by rotating the first bolt 8, and then the operator controls the electric wrench to move so that the nut extends into the drive groove 4. Then the operator pulls the drive ring 20, so that the limit column 22 is disengaged from the limit groove 23. Then the operator rotates the drive ring 20, so that the three threaded tubes 16 can be driven to rotate synchronously through the engagement of the annular rack 21 and the first gear 19. The rotation of the threaded tube 16 can drive the threaded rod 17 and the drive block 12 to move through the cooperation of the threaded tube 16 and the threaded rod 17. At the same time, the cooperation between the drive column 13 and the second positioning through hole 11 drives the positioning plate 9 to deviate at an angle, and then drives the positioning plate 9 to move. The positioning block 6 moves, so that the nut can be clamped by the movement of the positioning block 6, and then the operator loosens the drive ring 20, so that the drive ring 20 can be pressed against the side wall at the bottom of the annular groove 18 under the action of the support spring 24, so that the limit column 22 can extend into the limit groove 23, and then the angle of the drive ring 20 is limited by the cooperation between the limit column 22 and the limit groove 23, so as to avoid the position of the positioning block 6 being offset due to accidental touch during use. Then the operator controls the drilling rig to work, so as to control the drive seat 3 to rotate, so that the nut is driven to rotate by the clamping of the nut by the positioning block 6, thereby realizing the removal of the anchor bolt.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of convenient anchor bolt removal device, comprising a mounting sleeve (7), a screwdriver bit being fixedly arranged on the mounting sleeve (7), and a first bolt (8) penetratingly arranged on the side wall of the mounting sleeve (7), characterized in that: It also includes: a nut disassembly mechanism and an expansion tube disassembly mechanism, wherein the nut disassembly mechanism is used to disassemble the nut on the anchor bolt, and the expansion tube disassembly mechanism is used to disassemble the expansion tube on the anchor bolt, and the installation ends of the nut disassembly mechanism and the expansion tube disassembly mechanism are both provided with plugs matching the installation sleeve (7); The expansion tube disassembly mechanism comprises a first fixing tube (1), a second fixing tube (25) and a third fixing tube (26) are fixedly arranged in the first fixing tube (1), the second fixing tube (25) extends out of the first fixing tube (1), the inner wall of the third fixing tube (26) is provided with an internal thread, a bolt rod (27) is provided in the third fixing tube (26) through threaded cooperation, the bolt rod (27) extends into the second fixing tube (25), two L-shaped fixing heads (28) are fixedly arranged on the second fixing tube (25), a fixing through groove is provided on the side wall of the second fixing tube (25) at one side of the fixing head (28), a fixing block (30) is slidably arranged in the fixing through groove, a fixing spring is fixedly arranged in the fixing through groove and between the fixing block (30), a fixing ring (29) is fixedly arranged on the second fixing tube (25), and the fixing ring (29) is fixedly connected to the fixing block (30).

2. A new type of convenient anchor bolt removal device according to claim 1, characterized in that: The nut disassembly mechanism comprises: Driving seat (3); A driving groove (4), wherein the driving groove (4) is provided on the driving seat (3); Positioning grooves (5), three positioning grooves (5) are provided on the side wall of the driving groove (4); A positioning block (6), wherein the positioning block (6) is arranged in the positioning groove (5); A position adjustment mechanism is arranged in the positioning groove (5) and is used to control the positioning block (6) to adjust the position.

3. A new type of convenient anchor bolt removal device according to claim 2, characterized in that: The position adjustment mechanism comprises: A positioning plate (9), wherein two positioning plates (9) are hingedly provided between each positioning block (6) and the bottom of the positioning groove (5); A first positioning through hole (10), wherein the first positioning through hole (10) is provided on the positioning plate (9); A second positioning through hole (11), wherein the positioning plate (9) is provided with the second positioning through hole (11) on two side walls opposite to the first positioning through hole (10); A driving block (12), wherein the driving block (12) is arranged in the first positioning through hole (10); A driving column (13), wherein a plurality of the driving columns (13) are fixedly arranged on the driving block (12); Wherein, the driving column (13) corresponds to the second positioning through hole (11) one by one, and the driving column (13) extends into the second positioning through hole (11); A moving mechanism, the moving mechanism being arranged in the driving seat (3) and being used for controlling the driving block (12) to move; A support groove (14), wherein the support groove (14) is provided on the driving block (12); A support column (15), wherein the support column (15) is fixedly arranged on the side wall of each positioning groove (5), and the support column (15) extends into the support groove (14) and is slidably connected to the side wall of the support groove (14).

4. A new type of convenient anchor bolt removal device according to claim 3, characterized in that: The moving mechanism comprises: A first cavity, three of which are provided in the driving seat (3), and a positioning opening is provided between the first cavity and the positioning groove (5); a threaded tube (16), the threaded tube (16) being rotatably disposed in the first cavity; a threaded rod (17), wherein the threaded rod (17) is arranged in the positioning opening, one end of the threaded rod (17) is fixedly connected to the driving block (12), and the other end of the threaded rod (17) extends into the threaded tube (16) through threaded engagement; A synchronous rotation mechanism is arranged on the driving seat (3) and is used to control the three threaded tubes (16) to rotate synchronously.

5. A new type of convenient anchor bolt removal device according to claim 4, characterized in that: The synchronous rotation mechanism comprises: an annular groove (18), the annular groove (18) being formed on a side wall of the driving seat (3), the annular groove (18) being in communication with the first cavity; A first gear (19), wherein a mounting opening is provided on the first gear (19), and the first gear (19) is sleeved on the threaded tube (16) through the mounting opening, and the first gear (19) is fixedly connected to the threaded tube (16); a drive ring (20), the drive ring (20) being arranged in the annular groove (18); an annular rack (21), the annular rack (21) being fixedly arranged on the inner wall of the driving ring (20), the annular rack (21) being meshed with the first gear (19); A limiting mechanism, wherein the limiting mechanism is arranged on the driving ring (20) and is used to limit the rotation angle of the driving ring (20).

6. A new type of convenient anchor bolt removal device according to claim 5, characterized in that: The limiting mechanism comprises: A limiting column (22), the limiting column (22) being fixedly arranged on the side wall of the annular groove (18); Limiting grooves (23), a plurality of the limiting grooves (23) are provided on the side wall of the driving ring (20), and the limiting grooves (23) are adapted in shape to the limiting columns (22); Support springs (24), a plurality of the support springs (24) are fixedly arranged on the drive ring (20), and the support springs (24) are in contact with the side wall of the annular groove (18).

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