Multi-condition one-step type concealed anchor agent anchor rod

Abstract

The application discloses a multi-working-condition one-step type anchor rod with a built-in anchoring agent, which comprises a first thick rod and a thin rod sleeved with a first end sleeve in the first thick rod, the first end of the thin rod is provided with a retreat-preventing piece for preventing the thin rod from exiting the first thick rod when being reversed; the second end of the thin rod is externally provided with a second thick rod, and the thin rod is internally provided with a clamping piece; when the second thick rod is reversely rotated, the thin rod is rotated out of the second thick rod and drives the first thick rod to reversely rotate; when the thin rod is rotated out to a position, the thin rod is connected with the second thick rod through the clamping piece, and at this time, the second thick rod drives the thin rod to synchronously forwardly rotate. The anchor rod can be applied to short anchor rod construction working conditions and long anchor rod construction working conditions, and when applied to the long anchor rod construction working conditions, the anchor rod can be automatically lengthened in the anchor rod drilling or rod inserting process without being manually lengthened through a connecting sleeve, the construction is simple, the process of connecting the connecting sleeve is saved, and the construction process is simplified.

Description

Technical Field

[0001] This invention relates to the field of anchor bolt technology, and in particular to a multi-condition one-step anchor bolt with embedded anchoring agent. Background Technology

[0002] Currently, in the fields of geotechnical engineering, mining, and tunneling, anchor bolt support is commonly used, with resin anchor bolts and mortar anchor bolts being the most common types. In mine roadway support systems, resin anchor bolts have the advantages of short curing time and rapid stress application, but the cost of resin materials is very high.

[0003] The construction process of resin anchor bolts is as follows: (1) Drill anchor holes, (2) Send resin rolls into anchor holes, (3) Insert anchor bolts, (4) Rotate anchor bolts to break up resin rolls, and then use the resin rolls to anchor the bolts after they are mixed and solidified. In the second step, the resin rolls are usually pushed directly into the bottom of the anchor hole by high-pressure water or high-pressure air. However, during use, due to factors such as the anchor hole axis not being a standard straight line (i.e., the hole is not straight), the large friction between the resin rolls and the anchor hole, and the resin rolls themselves being soft and having poor guiding properties, it is difficult to deliver the resin rolls into place.

[0004] To address this issue, existing technologies have proposed a self-drilling prestressed hollow anchor bolt with embedded resin (such as the patent with publication number CN116291649A), which uses reverse drilling to extrude resin during forward drilling. However, such resin anchor bolts have the following problems: due to the design of a thick rod encasing a thin rod, the anchor bolt is long, which is typical for railway construction, while it cannot be used in construction scenarios where short anchor bolts are required (such as those used in coal mines). Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-condition one-step embedded anchor bolt that is suitable for both short and long anchor bolt construction. When applied to long anchor bolt construction, it eliminates the need for manual extension via a connecting sleeve. The anchor bolt can be automatically extended during drilling or insertion, simplifying construction and eliminating the need for connecting sleeves, thus simplifying the construction process.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A multi-condition one-step embedded anchor bolt includes a first thick rod and a thin rod with its first end sleeved inside the first thick rod. The first end of the thin rod is provided with a stop to prevent the thin rod from reversing out of the first thick rod. It also includes a second thick rod disposed outside the second end of the thin rod, and the thin rod is provided with a locking member inside.

[0008] When the second thick rod rotates in the reverse direction, the thin rod is screwed out of the second thick rod and the thin rod drives the first thick rod to rotate in the reverse direction; when the thin rod is screwed out into place, the thin rod is connected to the second thick rod through the locking device, at which time the second thick rod rotates in the forward direction and drives the thin rod to rotate in the forward direction synchronously.

[0009] Furthermore, the thin rod is provided with a telescopic hole, and the second thick rod is provided with a snap-fit ​​hole corresponding to the telescopic hole;

[0010] The locking component includes an elastic element and a locking post disposed on the elastic element; when the thin rod is screwed out to the telescopic hole and close to the locking hole, the elastic element deforms elastically and causes the locking post to retract into the telescopic hole; when the thin rod is screwed out to the position, the elastic element recovers and the locking post extends into the locking hole and locks with the second thick rod.

[0011] Furthermore, the first end of the thin rod is externally threaded with a first connecting sleeve, which is coaxially connected inside the first thick rod;

[0012] The first end of the thin rod is provided with a backstop, the size of which is larger than the inner diameter of the first connecting sleeve.

[0013] Furthermore, the anti-reverse component has a T-shaped cross-section and a through hole connecting the first thick rod and the thin rod.

[0014] Furthermore, the smaller end of the anti-reverse component is threaded into the thin rod.

[0015] Furthermore, the end of the second thick rod is provided with a second connecting sleeve, the snap-fit ​​hole is provided on the second connecting sleeve, and the second connecting sleeve is threaded to the outside of the thin rod.

[0016] Furthermore, the second end of the thin rod is provided with an anti-detachment sleeve.

[0017] Furthermore, the anti-detachment sleeve is threadedly connected to the thin rod.

[0018] Furthermore, the first thick rod has an anchor head at the end away from the second thick rod, and the second thick rod has a drive nut and a backstop nut on its exterior. The backstop nut is located on the side of the drive nut away from the anchor head, and the size of the backstop nut is smaller than that of the drive nut.

[0019] The beneficial effects of this invention are:

[0020] 1) The anchor bolt of the present invention is applicable to both short anchor bolt construction conditions and long anchor bolt construction conditions. When applied to long anchor bolt construction conditions, there is no need to manually extend it through the connecting sleeve. The anchor bolt can be automatically extended during the anchor bolt drilling or insertion process, which simplifies the construction and eliminates the process of connecting the connecting sleeve, thus simplifying the construction procedure.

[0021] 2) Setting up the first connecting sleeve and the second connecting sleeve can shorten the threaded connection between the thin rod and the first thick rod and the second thick rod. While reducing the friction during the rotation of the rod, only the thread accuracy of the thin rod and the connecting sleeve needs to be controlled during processing. This can significantly reduce the thread processing accuracy requirements of the inner and outer surfaces of the anchor rod, thereby reducing the manufacturing cost of the anchor rod. Attached Figure Description

[0022] Figure 1 This is a perspective view of a multi-condition one-step embedded anchor bolt with anchoring agent in an embodiment of the present invention;

[0023] Figure 2 A cross-sectional view of a multi-condition one-step internal anchor bolt with embedded anchoring agent;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle section;

[0025] Figure 4 for Figure 2 Enlarged view of point B in the middle section;

[0026] Figure 5 for Figure 2 Enlarged view of point C in the middle section;

[0027] Figure 6 This is a perspective view of the forward and reverse rotation lever driving fixture in an embodiment of the present invention;

[0028] Figure 7 This is a side view of the forward and reverse rotating lever drive fixture;

[0029] Figure 8 for Figure 7 Sectional view along the DD direction;

[0030] Figure 9 for Figure 7 EE-directed sectional view;

[0031] Figure 10 A three-dimensional view of the drive inner sleeve, power sleeve, and transmission sleeve;

[0032] Figure 11 A three-dimensional view of the drive inner sleeve and the power sleeve;

[0033] Figure 12 A three-dimensional view of the side of the power sleeve and drive inner sleeve;

[0034] In the diagram, 1. First thick rod; 2. Thin rod; 3. Anti-reverse component; 4. Second thick rod; 5. Locking component; 6. Telescopic hole; 7. Snap-fit ​​hole; 8. Elastic component; 9. Snap-fit ​​post; 10. First connecting sleeve; 11. Second connecting sleeve; 12. Anti-disengagement sleeve; 13. Drive nut; 14. Anti-reverse nut; 15. Drive inner sleeve; 16. Power sleeve; 17. Transmission sleeve; 18. Clip; 19. Transmission component; 20. Spiral inclined groove; 21. Drive groove; 22. Waist-shaped post; 23. Cylindrical; 24. Anti-disengagement rod; 25. Rotation groove; 26. Rotation ring platform; 27. Power ring plate; 28. Rotation limiting groove; 29. ​​Protruding ridge; 30. Power rod. Detailed Implementation

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] See Figures 1-12 The present invention provides a technical solution:

[0037] Example:

[0038] like Figures 1-12 As shown, a multi-condition one-step embedded anchor bolt includes a first thick rod 1 and a thin rod 2 with its first end sleeved inside the first thick rod 1. When the anchor bolt is in use, the anchoring agent provided inside the first thick rod 1 can be, but is not limited to, a resin cartridge or other chemical cartridges with anchoring function. The first end of the thin rod 2 is provided with a stopper 3 to prevent the thin rod 2 from exiting the first thick rod 1 when reversed. It also includes a second thick rod 4 provided outside the second end of the thin rod 2 (the second end outside refers to the remaining part of the thin rod 2 excluding the part located inside the first thick rod 1, which can be the entire part or a part of the length, i.e., the length of the thin rod 2 located inside the second thick rod 4 is determined according to the actual working conditions). The thin rod 2 is provided with a locking member 5.

[0039] When the second thick rod 4 rotates in the reverse direction, the thin rod 2 rotates out of the second thick rod 4 and the thin rod 2 drives the first thick rod 1 to rotate in the reverse direction; when the thin rod 2 rotates out to the correct position, the thin rod 2 is connected to the second thick rod 4 through the locking part 5 (the locking part 5 is used to limit the relative rotation between the second thick rod 4 and the thin rod 2 when rotating in the forward direction). At this time, the second thick rod 4 rotates in the forward direction and drives the thin rod 2 to rotate in the forward direction synchronously.

[0040] An anchor head / drill bit is fixedly provided at the end of the first thick rod 1 away from the second thick rod 4. A drive nut 13 and a backstop nut 14 are provided on the outside of the second thick rod 4. The backstop nut 14 is located on the side of the drive nut 13 away from the anchor head, and the size of the backstop nut is smaller than that of the drive nut 13.

[0041] Working principle: This anchor bolt can be used in coal mine construction. Specifically, the second thick rod 4 is rotated in the opposite direction by the driving tool. When the second thick rod 4 rotates in the opposite direction, the thin rod 2 is unscrewed from the second thick rod 4. The unscrewed process of the thin rod 2 drives the first thick rod 1 to rotate in the opposite direction at the same time. At this time, the anchor bolt is drilled in as a whole. This can ensure the smooth insertion of the anchor bolt when the anchor hole collapses or the anchor hole is not a straight hole.

[0042] When the thin rod 2 is fully unscrewed (fully unscrewed means that the second end of the thin rod 2 is located at the end of the second thick rod 4 near the first thick rod 1, and the second end of the thin rod 2 is connected to the second thick rod 4 through the locking piece 5), the entire anchor rod is inserted into place, and the anchor head reaches (presses against) the bottom of the anchor hole.

[0043] At this point, anchoring can begin: the second thicker rod 4 is rotated forward by the driving fixture, and the thinner rod 2 rotates synchronously with the second thicker rod 4 under the action of the locking component 5. Because the anchor head is pressed tightly against the bottom of the hole, the first thicker rod 1 has a large frictional force. Therefore, when the thinner rod 2 rotates forward, the first thicker rod 1 remains stationary relative to the anchor hole, and the thinner rod 2 moves towards the anchor head within the first thicker rod 1. During the movement of the thinner rod 2 towards the anchor head, the resin cartridge is ruptured and squeezed out of the slurry outlet on the anchor head into the anchor hole.

[0044] When the thin rod 2 moves into position in the direction of the first thick rod 1 towards the anchor head, the resin cartridge is completely squeezed out. When the second thick rod 4 continues to rotate in the forward direction, the second thick rod 4 drives the thin rod 2 and the first thick rod 1 to rotate in the forward direction as a whole, thereby stirring the resin in the anchor hole and accelerating the solidification speed of the resin.

[0045] After the resin solidifies, the drive nut 13 is turned to move towards the anchor head, thereby pressing the pad against the outside of the anchor hole and applying prestress.

[0046] The anchor bolt of this invention is suitable not only for short-term construction but also for long-term construction, specifically as follows:

[0047] When applied to long anchor bolt construction, if the overall anchor bolt length needs to be 8m, the lengths of the thinner rod 2 and the second thicker rod 4 should be set to 3.8-4.5m. The specified length will be achieved once the thinner rod 2 extends. The advantage of using this anchor bolt in long anchor bolt construction is that it eliminates the need for manual extension via connecting sleeves. The anchor bolt can be automatically extended during drilling or insertion, simplifying construction and eliminating the need for connecting sleeves, thus streamlining the construction process.

[0048] The anchor bolt of the present invention is applicable to both short and long anchor bolt construction conditions. When applied to long anchor bolt construction conditions, there is no need to manually extend it through the connecting sleeve. The anchor bolt can be automatically extended during the drilling or insertion process, which simplifies the construction and eliminates the process of connecting the connecting sleeve, thus simplifying the construction procedure.

[0049] like Figures 6-12 As shown, the aforementioned drive fixture includes a drive inner sleeve 15, a power sleeve 16 disposed outside the drive inner sleeve 15, and a transmission sleeve 17 disposed outside the power sleeve 16.

[0050] One end of the drive inner sleeve 15 is connected to the drill bit drive, and the other end of the drive inner sleeve 15 is connected to the drive nut 13 sleeved on the anchor rod. The drive nut 13 is a hexagonal nut used to drive the rod to rotate forward and backward.

[0051] The power sleeve 16 can move linearly along the axial direction of the drive inner sleeve 15;

[0052] The transmission sleeve 17 is rotatably connected to the drive inner sleeve 15. The transmission sleeve 17 is provided with at least one locking pin 18 for limiting the drive nut 13 on the rod. One end of the locking pin 18 extends into the drive inner sleeve 15. The transmission sleeve 17 is connected to the power sleeve 16 through at least one transmission member 19. When the power sleeve 16 moves axially, it drives the transmission sleeve 17 to rotate through the transmission member 19. When the transmission sleeve 17 rotates, it drives the locking pin 18 to move radially along the drive inner sleeve 15.

[0053] The power sleeve 16 has at least one spiral groove 20 on its circumferential wall. The transmission member 19 is fixed to the transmission sleeve 17, and one end of the transmission member 19 extends into the spiral groove 20.

[0054] The transmission sleeve 17 is provided with a drive groove 21, the width of which is adapted to the outer diameter of the pin 18, and the pin 18 extends into the drive inner sleeve 15 through the drive groove 21;

[0055] The drive groove 21 has an arc, and the distance from the lowest point of the drive groove 21 to the axis of the drive inner sleeve 15 gradually increases from the highest point of the drive groove 21 to the axis of the drive inner sleeve 15.

[0056] The pin 18 includes a waist-shaped post 22 and a cylinder 23 connected to the waist-shaped post 22. One end of the waist-shaped post 22 extends into the drive inner sleeve 15, and the other end of the waist-shaped post 22 is located inside the drive groove 21. The width of the waist-shaped post 22 is greater than the width of the drive groove 21.

[0057] One end of the cylinder 23 passes through the drive groove 21, and a horizontally arranged anti-detachment rod 24 is provided at the end of the cylinder 23 that passes through the drive groove 21.

[0058] The inner wall of the transmission sleeve 17 is provided with a rotating groove 25, and the outer wall of the driving inner sleeve 15 is provided with a rotating ring platform 26. The transmission sleeve 17 is rotatably connected to the driving inner sleeve 15 through the rotating groove 25 and the rotating ring platform 26.

[0059] The transmission sleeve 17 is provided with a threaded hole that communicates with the interior of the transmission sleeve 17. The axis of the threaded hole is perpendicular to the axis of the drive inner sleeve 15. The transmission member 19 is a screw. The transmission member 19 is threadedly connected to the threaded hole. One end of the transmission member 19 extends into the spiral groove 20.

[0060] The end of the power sleeve 16 is located outside the transmission sleeve 17, and the end of the power sleeve 16 located outside the transmission sleeve 17 is coaxially provided with a power ring plate 27.

[0061] The inner wall of the power sleeve 16 is provided with a rotation limiting groove 28 along the axial direction, and the outer wall of the drive inner sleeve 15 is provided with a protrusion 29 that is adapted to the rotation limiting groove 28.

[0062] A power rod 30 is connected to the power ring plate 27, and one end of the power rod 30 is connected to the reciprocating telescopic power component; the cross-section of the power rod 30 is F-shaped.

[0063] The reciprocating telescopic power component is a pneumatic cylinder, a hydraulic cylinder, or an electric telescopic rod.

[0064] The drive inner sleeve 15 is a circular sleeve, and the drive inner sleeve 15 is provided with a non-circular hole that is adapted to the drive nut 13.

[0065] The working principle of the drive fixture is as follows: The drill bit provides power to drive the inner sleeve 15 to rotate.

[0066] (1) When the rod reverses, the drill bit drives the inner drive sleeve 15 to rotate in the opposite direction. When the inner drive sleeve 15 rotates in the opposite direction, it drives the drive nut 13 to rotate in the opposite direction. When the drive nut 13 rotates in the opposite direction, the anchor rod rotates in the opposite direction due to the action of the anti-reverse nut 14. At this time, the anchor rod can be used for drilling or entering the anchor hole by rotating.

[0067] (2) Before rotating forward, first pull / push the power sleeve 16. In this embodiment, the power sleeve 16 is pulled (the power sleeve 16 can be driven manually or by the mechanical components described below). The power sleeve 16 moves axially along the inner drive sleeve 15. When the power sleeve 16 moves, it drives the transmission sleeve 17 to rotate relative to the inner drive sleeve 15 through the transmission component 19. When the transmission sleeve 17 rotates, the locking pin 18 on it moves radially (at the center) along the inner drive sleeve 15, thereby positioning the locking pin 18 at the front end of the drive nut 13 and blocking the drive nut 13 from moving forward axially. Here, the forward movement of the drive nut 13 refers to moving away from the drill bit (the aforementioned process of operating the power sleeve 16 and transmission sleeve 17 can keep the inner drive sleeve 15 stationary).

[0068] During forward rotation, the drill bit tip drives the inner drive sleeve 15 to rotate in the forward direction, which in turn drives the drive nut 13 to rotate in the forward direction. Because the front end of the drive nut 13 is restricted by the retaining pin 18, the drive nut 13 can only rotate in the forward direction, and this rotation drives the anchor bolt to rotate in the forward direction. At this time, the forward rotation of the anchor bolt can be used for operations such as resin extrusion or resin mixing.

[0069] When the anchor rod resin is extruded and solidifies, the drive sleeve 16 resets. During this reset, the drive sleeve 16 drives the transmission sleeve 17 to rotate in the opposite direction relative to the drive inner sleeve 15. This reverse reset process of the transmission sleeve 17 causes the locking pin 18 to move radially outward along the drive inner sleeve 15, thus retracting the locking pin 18. At this point, the locking pin 18 no longer restricts the axial displacement of the drive nut 13. When the drill bit rotates forward again, the drive inner sleeve 15 will drive the drive nut 13 to rotate and advance axially. The forward displacement of the drive nut 13 can then be used to apply prestress to the anchor rod's pad.

[0070] The rod driving fixture of the present invention can not only drive the rod to rotate forward, but also drive the rod to rotate in reverse. It can also solve the problem of axial movement of the driving nut 13 when the rod rotates forward. After the rod driving ends, the fixture can be separated from the rod by simply withdrawing in a straight line. The disassembly and assembly process is quick and convenient, and there is no need for pole-holding construction, which greatly reduces the construction difficulty.

[0071] Furthermore, such as Figures 2-4 As shown, the thin rod 2 is provided with a telescopic hole 6, and the second thick rod 4 is provided with a snap-fit ​​hole 7 corresponding to the telescopic hole 6;

[0072] The locking component 5 includes an elastic element 8 and a locking post 9 disposed on the elastic element 8. During the extension of the thin rod 2, the locking post is in a free state or retracts into the telescopic hole 6. When the thin rod 2 is extended to the point where the telescopic hole is close to the locking hole, the elastic element 8 elastically deforms, causing the locking post 9 to retract into the telescopic hole 6. When the thin rod 2 is fully extended, the elastic element 8 returns to its original position, and the locking post 9 extends into the locking hole 7 to engage with the second thick rod 4. Here, "fully extended" means that the telescopic hole and the locking hole are coaxially aligned. In this embodiment, when the second connecting sleeve is not used, the locking post is always compressed within the telescopic hole by the inner wall of the second thick rod during the extension of the thin rod.

[0073] The end of the second thick rod 4 is provided with a second connecting sleeve 11, and the snap-fit ​​hole 7 is provided on the second connecting sleeve 11. The second connecting sleeve 11 is threaded to the outside of the thin rod 2. The second connecting sleeve 11 is fixed to the second thick rod 4, and the fixing method can be, but is not limited to, welding.

[0074] In this embodiment, before the thin rod is screwed out to the locking hole, the second connecting sleeve 11 is used, so the inner hole of the second thick rod becomes larger. During the screwing out process of the thin rod, the inner wall of the second thick rod does not press the locking post back into the telescopic hole. That is, before the thin rod is screwed out to the point where the locking hole corresponds to the telescopic hole, the locking post is in a free state.

[0075] When the thin rod 2 is rotated out until the locking post 9 contacts the second connecting sleeve 11, the locking post 9 retracts into the telescopic hole 6 under the squeezing action of the second connecting sleeve 11. As the thin rod 2 continues to move, when the locking hole 7 corresponds to the telescopic hole 6, since there is no squeezing action of the second connecting sleeve 11, the locking post 9 is reset under the action of the elastic element 8 and extends from the telescopic hole 6 into the locking hole 7, thereby realizing the connection between the thin rod 2 and the second thick rod 4. At this time, the thin rod 2 and the second thick rod 4 are connected as one, and the two will not rotate relative to each other.

[0076] Furthermore, the first end of the thin rod 2 is externally threaded with a first connecting sleeve 10, and the first connecting sleeve 10 is coaxially connected inside the first thick rod 1;

[0077] The first end of the thin rod 2 is provided with a backstop 3, the size of which is larger than the inner diameter of the first connecting sleeve 10.

[0078] The first connecting sleeve 10 is fixed after being threaded to the first thick rod 1. The fixing method can be, but is not limited to, welding. The first connecting sleeve 10 can also be directly fixed to the first thick rod 1.

[0079] The purpose of setting the first connecting sleeve 10 and the second connecting sleeve 11 is to shorten the threaded connection between the thin rod 2 and the first thick rod 1 and the second thick rod 4. While reducing the friction during the rotation of the rod, only the thread accuracy of the thin rod 2 and the connecting sleeve needs to be controlled during processing. This can significantly reduce the thread processing accuracy requirements of the inner and outer surfaces of the anchor rod, thereby reducing the manufacturing cost of the anchor rod.

[0080] Furthermore, such as Figure 5 As shown, the anti-reverse member 3 has a T-shaped cross-section and a through hole connecting the first thick rod 1 and the thin rod 2. The anti-reverse structure of the thin rod 2 and the first thick rod 1 is not limited to the structure of the anti-reverse member in this embodiment.

[0081] Furthermore, such as Figure 5 As shown, the smaller end of the anti-reverse component 3 is threaded into the thin rod 2. This arrangement facilitates anchor bolt assembly.

[0082] Furthermore, such as Figure 3 As shown, the second end of the thin rod 2 is provided with an anti-detachment sleeve 12. The anti-detachment sleeve 12 can prevent the thin rod 2 from unscrewing out of the second thick rod 4.

[0083] Furthermore, such as Figure 3As shown, the anti-detachment sleeve 12 is threadedly connected to the thin rod 2. The anti-detachment sleeve is a circular sleeve structure with a threaded hole that fits the outside of the thin rod. The outer diameter of the anti-detachment sleeve is smaller than the inner diameter of the second thick rod to reduce friction when the thin rod extends.

[0084] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A multi-condition one-step embedded anchor bolt, comprising a first thick rod and a thin rod with its first end sleeved within the first thick rod, wherein the first end of the thin rod is provided with a stopper to prevent the thin rod from retracting from the first thick rod during reverse rotation; characterized in that: It also includes a second thicker rod disposed outside the second end of the thin rod, and the thin rod has a locking component inside; When the second thick rod rotates in the reverse direction, the thin rod is screwed out of the second thick rod and the thin rod drives the first thick rod to rotate in the reverse direction; when the thin rod is screwed out into place, the thin rod is connected to the second thick rod through the locking piece, at which time the second thick rod rotates in the forward direction and drives the thin rod to rotate in the forward direction synchronously. The thin rod is provided with a telescopic hole, and the second thick rod is provided with a snap-fit ​​hole corresponding to the telescopic hole; The locking component includes an elastic element and a locking post disposed on the elastic element; when the thin rod is screwed out to the telescopic hole and close to the locking hole, the elastic element deforms elastically and causes the locking post to retract into the telescopic hole; when the thin rod is screwed out to the position, the elastic element recovers and the locking post extends into the locking hole and locks with the second thick rod.

2. The multi-condition one-step embedded anchor bolt according to claim 1, characterized in that: The first end of the thin rod is externally threaded with a first connecting sleeve, and the first connecting sleeve is coaxially connected inside the first thick rod; The anti-reverse component is disposed at the first end of the thin rod, and the size of the anti-reverse component is larger than the inner diameter of the first connecting sleeve.

3. The multi-condition one-step embedded anchor bolt according to claim 2, characterized in that: The anti-reverse component has a T-shaped cross-section and a through hole connecting the first thick rod and the thin rod.

4. The multi-condition one-step embedded anchor bolt according to claim 3, characterized in that: The smaller end of the anti-reverse component is threaded into the thin rod.

5. The multi-condition one-step embedded anchor bolt according to claim 1, characterized in that: The end of the second thick rod is provided with a second connecting sleeve, and the snap-fit ​​hole is provided on the second connecting sleeve. The second connecting sleeve is threaded to the outside of the thin rod.

6. The multi-condition one-step embedded anchor bolt according to claim 5, characterized in that: The second end of the thin rod is provided with an anti-detachment sleeve.

7. The multi-condition one-step embedded anchor bolt according to claim 6, characterized in that: The anti-detachment sleeve is threadedly connected to the thin rod.

8. The multi-condition one-step embedded anchor bolt according to claim 1, characterized in that: An anchor head is provided at the end of the first thick rod away from the second thick rod. A drive nut and a backstop nut are provided on the outside of the second thick rod. The backstop nut is located on the side of the drive nut away from the anchor head, and the size of the backstop nut is smaller than that of the drive nut.

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