Prefabricated column steel bar butt-joint grouting auxiliary alignment device

Abstract

The utility model discloses a prefabricated column steel bar butt-joint grouting auxiliary alignment device which comprises an installation pre-position, a butt-joint steel bar is pre-embedded in the top of an installation face of the installation pre-position, the outer portion of the top end of the butt-joint steel bar is corrected through a correction device, and the type of the used correction device is determined according to installation requirements during correction. When large-scale prefabricated columns are encountered, a plate type reinforcing steel bar positioning frame machined through linear cutting or laser cutting can be selected to correct reinforcing steel bars, and under the situation that the number of prefabricated column reinforcing steel bars of various sizes are adopted, the number, the distance and the distribution position of the correcting mechanism can be adjusted, and the correcting mechanism is arranged in advance according to the positions and the sizes of the reinforcing steel bars. And then verification is carried out in the same mode, the position and the vertical degree of the reinforcing steel bar are calibrated finally, and the correction work of the reinforcing steel bar is completed finally. The problem that the butt joint process is troublesome in the subsequent butt joint process due to the fact that the installation position of an existing prefabricated column is subjected to external force, corrosion, concrete drying stress and the like and the reserved steel bars are bent is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building technology, specifically to an auxiliary alignment device for grouting precast column steel bar butt joints. Background Technology

[0002] With the continuous development of industrialized construction, prefabricated concrete structures have been widely used in building engineering. Among these methods, the use of grouting with steel sleeves for butt welding of precast column reinforcement is a common connection technique that effectively improves construction efficiency and structural stability. However, in actual construction, due to transportation, hoisting, and environmental factors, the pre-reserved steel bars at the ends of precast columns often experience bending, displacement, or deformation, making it difficult to connect the reinforcement bars to the sleeves. This severely affects subsequent installation accuracy and grouting quality, increasing construction difficulty and the risk of rework.

[0003] In existing technologies, simple locating plates or manual straightening methods are commonly used to adjust the reinforcing bars to assist in positioning and straightening. However, these methods suffer from drawbacks such as low straightening accuracy, complex operation, and limited applicability. Especially when dealing with precast columns of different sizes and reinforcing bar layouts of varying quantities and spacings, traditional methods struggle to ensure precise alignment of each reinforcing bar, easily leading to problems such as difficulty in inserting the reinforcing bars, insufficient grouting of the sleeves, or reduced connection strength, thus affecting structural safety.

[0004] Therefore, there is an urgent need for an auxiliary alignment device that can adapt to various quantities and arrangements of reinforcing bars, enabling rapid and reliable positioning and correction of the reinforcing bars before the hoisting of precast columns, ensuring smooth insertion of the reinforcing bars into the sleeves and meeting design requirements. To address this need, this utility model provides an auxiliary alignment device for grouting precast column reinforcing bar connections. It allows for flexible selection of a reinforcing bar positioning frame or a correction mechanism based on actual construction conditions, effectively solving installation problems caused by deformation of the reserved reinforcing bars and improving the construction quality of precast column grouting connections. Utility Model Content

[0005] The purpose of this invention is to provide an auxiliary alignment device for grouting precast column steel bars to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a precast column rebar butt grouting auxiliary alignment device, comprising an installation preposition, wherein a butt rebar is pre-embedded in the top of the installation surface of the installation preposition; the top of the butt rebar is corrected by a correction device; the correction device includes a rebar positioning frame, wherein the upper surface of the rebar positioning frame has a guide opening 1 with the same number as the butt rebar, and the bottom end of the guide opening 1 has a conical opening 1; after the bent butt rebar passes through the conical opening 1, the bent part of the butt rebar moves closer to the center of the conical opening 1 and the guide opening 1.

[0007] Preferably, the correction device includes a correction mechanism, which includes a fixed frame and an assembly frame spaced apart vertically. A fixing strip is slidably mounted on the outside of the assembly frame, and a hook is slidably mounted on the outside of the fixing strip. A guide sleeve is screwed to the inner end of the hook. A positioning structure is screwed to the outer wall of both the fixing strip and the hook, and the fixing strip and the hook are mutually positioned with the assembly frame and the fixing strip through the positioning structure.

[0008] Preferably, a positioning control line is drawn on the upper surface of the mounting surface at a distance of 200mm from the periphery of the precast column installation position.

[0009] Preferably, a column is provided above the fixed frame, and mounting holes are provided on the outer surface of the assembly frame at corresponding positions to the column, with a nut screwed into the top of the column through the mounting hole.

[0010] Preferably, the fixing strip includes a longitudinal strip and a transverse strip, and hooks are provided on both sides of the transverse strip and the longitudinal strip. The outer side of the hooks is provided with a screw hole, and a bolt is screwed into the screw hole to position the hooks and the assembly frame.

[0011] Preferably, a pad is welded to the inner side of the hook claw of the horizontal bar, and the thickness of the pad is greater than the thickness of the vertical bar.

[0012] Preferably, the hook includes a U-shaped fixing buckle, the bottom end of which is welded with a positioning head, the positioning head having an internal thread, and the guide sleeve being screwed into the internal thread.

[0013] Preferably, the guide sleeve includes a screw tube, the outside of which is threaded, the bottom of which is tapered, and the top of which is guide.

[0014] Preferably, a hexagonal head is welded to the top of the spiral tube.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides an auxiliary alignment device for the connection of precast column rebars with a correction device. It is used for the pre-correction of rebars at the installation position before the installation of precast columns. When using it, the type of correction device is determined according to the installation requirements. When dealing with a large number of precast columns, a plate-type rebar positioning frame processed by wire cutting or laser cutting can be selected to correct the rebars. In the case of precast column rebars of various sizes and quantities, a correction mechanism with adjustable quantity, spacing and distribution position can be used. After being set in advance according to the rebar position and size, and then verified in the same way, the position and verticality of the rebars are finally calibrated, and the rebar correction work is completed. This effectively solves the problem that the bending of the reserved rebars caused by external forces, corrosion, concrete drying stress and other reasons at the installation position of the precast column causes trouble in the subsequent connection process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the rebar positioning frame structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the bottom view of the main steel bar positioning frame of this utility model.

[0019] Figure 4 This is a schematic diagram of the correction state in Embodiment 2 of this utility model.

[0020] Figure 5 This is a schematic diagram of the assembly of the correction mechanism in Embodiment 2 of this utility model.

[0021] Figure 6 This is an explosion view of the correction mechanism of this utility model.

[0022] Figure 7 This is the second explosion perspective of the correction mechanism of this utility model.

[0023] Figure 8 This is a schematic diagram of the guide sleeve structure of this utility model.

[0024] Figure 9 This is a cross-sectional schematic diagram of the guide sleeve of this utility model.

[0025] Figure 10 This is a schematic diagram of the guide sleeve structure of this utility model.

[0026] Figure 11 This is a cross-sectional schematic diagram of the guide sleeve of this utility model.

[0027] In the diagram: 1. Installation pre-positioning, 11. Installation surface, 12. Positioning control line, 13. Connecting rebar, 2. Correction mechanism, 21. Fixing frame, 22. Column, 23. Assembly frame, 24. Longitudinal bar, 25. Horizontal bar, 26. Pad, 27. Hook, 28. Positioning head, 29. Positioning bolt, 3. Guide sleeve, 31. Screw tube, 32. Conical opening two, 33. Guide opening two, 34. Hexagonal head, 4. Rebar positioning frame, 41. Fixing plate, 42. Guide opening one, 43. Conical opening one. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1:

[0030] Please see Figure 1-3 This utility model provides a technical solution: a precast column rebar butt grouting auxiliary alignment device, including a pre-positioning 1, on which a butt rebar 13 is pre-embedded at the top of the mounting surface 11 of the pre-positioning 1; the top of the butt rebar 13 is corrected by a correction device; the correction device includes a rebar positioning frame 4, the upper surface of the rebar positioning frame 4 has guide openings 42 of the same number as the butt rebar 13, and the bottom end of the guide openings 42 has a conical opening 43; after the bent butt rebar 13 passes through the conical opening 43, the bent part of the butt rebar 13 moves closer to the center of the conical opening 43 and the guide opening 42.

[0031] Specifically, a positioning control line 12 is drawn on the upper surface of the mounting surface 11 at a distance of 200mm from the periphery of the precast column installation position.

[0032] This embodiment provides an auxiliary alignment device for grouting of precast column rebars, mainly including a pre-positioning device 1 and a rebar positioning frame 4. It is suitable for rebar positioning during the grouting connection construction of precast concrete frame columns. By setting the rebar positioning frame 4, the rebars 13 can be quickly limited and accurately guided, ensuring that the rebars are smoothly inserted into the rebar sleeves of the precast column and guaranteeing the quality of grouting construction.

[0033] The usage and operation steps of the rebar positioning frame 4 in the process of connecting rebars in precast columns are as follows:

[0034] 1. Measurement and layout: Before construction, the surveyors will measure and lay out the lines according to the design drawings. The installation surface 11 will be set on the floor slab and the positioning control line 12 will be marked to form the benchmark control line for the installation of the precast column, which will be used for the installation of the rebar positioning frame 4 and the positioning of the rebar.

[0035] 2. Rebar cleaning and positioning: The reserved butt-joint rebars 13 are derusted and cleaned. After cleaning the surface, the rebars are passed through the guide opening 42 of the rebar positioning frame 4. The rebar positioning frame 4 provides overall support through the fixing plate 41. The guide opening 42 limits the position of each rebar, and the conical opening 43 plays a guiding and correcting role during the insertion of the rebars, so that the rebars remain straight and evenly spaced according to the design position, avoiding skewing and deviation.

[0036] 3. Elevation measurement and adjustment: After the rebar positioning frame 4 is installed, the horizontal height of the installation surface 11 is re-measured. Based on the measurement results, shims are set below to level the surface, ensuring that the rebar positioning frame 4 is horizontally stable and avoiding deviation of the rebar axis due to tilting.

[0037] 4. Precast column hoisting and connection: After completing the rebar positioning, the precast column hoisting operation is carried out. During hoisting, the precast column is slowly lowered. Before approaching the final position, auxiliary methods such as mirror observation are used to ensure that the rebar and the sleeve hole are aligned. Relying on the limiting effect of the rebar positioning frame 4, the rebar is smoothly aligned with the sleeve hole and inserted to the specified depth, completing the initial connection between the rebar and the precast column.

[0038] 5. Precast column support and fixing: After the precast column is in place, a support base is installed on the floor slab and temporarily fixed by an adjustable support rod. Diagonal bracing is used for reinforcement to stabilize the precast column in the design position and prevent displacement or tilting in subsequent processes.

[0039] 6. Sealing and Grouting: After the precast column is fixed and stable, use sealing grout to tightly seal the gaps at the bottom of the column to ensure no leakage during grouting. Then, use the pressure grouting method to inject grout from the bottom through the grouting pipe. After the grout fills the sleeve and flows out from the grout discharge hole, the sealing is completed, ensuring a reliable connection between the reinforcing steel and the sleeve.

[0040] 7. Settling and Acceptance: After grouting, allow the grout to stand for at least 24 hours to prevent vibration or external interference. After the settling period, check the rebar connection accuracy and grout fullness according to the specifications. Only after confirming that the design and construction requirements are met can the next process begin.

[0041] In summary, this embodiment uses the rebar positioning frame 4 to limit and guide the butt rebar 13, enabling the rebar to be inserted into the precast column rebar sleeve quickly and accurately. This simplifies the butt construction process, improves positioning accuracy and grouting quality, and has the advantages of simple structure, convenient operation, and strong applicability.

[0042] Example 2:

[0043] Please see Figure 4-11 This utility model provides a technical solution: a precast column rebar butt grouting auxiliary alignment device, including an installation preposition 1, wherein a butt rebar 13 is pre-embedded in the top of the installation surface 11 of the installation preposition 1; the top of the butt rebar 13 is corrected by a correction device.

[0044] The correction device includes a correction mechanism 2, which includes a fixed frame 21 and an assembly frame 23 arranged at intervals. A fixing strip is slidably mounted on the outside of the assembly frame 23, and a hook 27 is slidably mounted on the outside of the fixing strip. A guide sleeve 3 is screwed to the inner end of the hook 27. The outer walls of the fixing strip and the hook 27 are screwed with positioning structures, and the fixing strip and the hook 27 are mutually positioned with the assembly frame 23 and the fixing strip through the positioning structures.

[0045] This utility model provides an auxiliary alignment device for the splicing of precast column reinforcing bars with a correction mechanism. It is used for the pre-correction of reinforcing bars at the installation position before the installation of precast columns. During use, the type of correction device to be used is determined according to the installation requirements. When dealing with a large number of precast columns, a plate-type reinforcing bar positioning frame 4 processed by wire cutting or laser cutting can be selected to correct the reinforcing bars. In the case of precast column reinforcing bars of various sizes and quantities, a correction mechanism 2 with adjustable quantity, spacing and distribution position can be used. After being set in advance according to the position and size of the reinforcing bars, and then verified in the same way, the position and verticality of the reinforcing bars are finally calibrated, and the correction work of the reinforcing bars is finally completed. This effectively solves the problem that the bending of the reserved reinforcing bars caused by external forces, corrosion, concrete drying stress and other reasons at the installation position of precast columns causes trouble in the subsequent splicing process.

[0046] Specifically, a positioning control line 12 is drawn on the upper surface of the mounting surface 11 at a distance of 200mm from the periphery of the precast column installation position.

[0047] Specifically, a column 22 is provided above the fixed frame 21, and mounting holes are opened on the outer surface of the assembly frame 23 at the corresponding positions of the column 22. A nut is screwed into the top of the column 22 through the mounting hole.

[0048] The fixed frame 21 and the assembly frame 23 are isolated and installed by the column 22, and some space is reserved at the bottom of the assembly frame 23 to facilitate the installation of the adjustable parts. A baffle is provided on the top of the column 22. The column 22 is a screw structure. The baffle can be welded to the outside of the screw or screwed to the outside of the screw structure with a nut as a baffle.

[0049] Specifically, the fixing strip includes a vertical strip 24 and a horizontal strip 25. Hooks are provided on both sides of the horizontal strip 25 and the vertical strip 24. Screw holes are opened on the outer side of the hooks, and bolts are screwed into the screw holes to position the hooks and the assembly frame 23.

[0050] Screw holes are provided on the outer side or bottom of the longitudinal bar 24 and the transverse bar 25. When in use, bolts can be screwed in at a convenient position. When tightened, the fixing bar and the assembly frame 23 are locked in place. When loosened, the fixing bar and the assembly frame 23 are adjusted relative to each other.

[0051] Specifically, a pad 26 is welded to the inner side of the hook claw of the horizontal bar 25. The thickness of the pad 26 is greater than that of the vertical bar 24. When the horizontal bar 25 with the pad 26 is assembled with the assembly frame 23, it can cross the position of the vertical bar 24, so that the horizontal and vertical structures will not interfere with each other. Moreover, there are no requirements for the adjustment position during the adjustment process. Therefore, the height position of the guide sleeve 3 has no absolute impact on the adjustment effect.

[0052] Specifically, the hook 27 includes a U-shaped fixing buckle, and a positioning head 28 is welded to the bottom end of the fixing buckle. The positioning head 28 has an internal thread, and the guide sleeve 3 is screwed into the internal thread. The installation method of the hook 27 is the same as that of the fixing strip. Both are screwed into the screw hole by bolts. The same principle as the set screw is used to adjust or fix the position of the hook 27 and the fixing strip.

[0053] The guide sleeve 3 can be screwed into the inside of the positioning head 28, and its screwing height can be adjusted. Therefore, under certain conditions, such as when the steel bar is bent to one side, the height position of the guide sleeve 3 relative to the positioning head 28 can be adjusted to help offset the height difference between the horizontal bar 25 and the vertical bar 24, control the height of the cone 32, and uniformly adjust the position of the guide and straightening steel bar.

[0054] Specifically, the guide sleeve 3 includes a screw tube 31, the outside of which is threaded, the bottom of which is tapered 32, and the top of which is guide 33.

[0055] Specifically, a hexagonal head 34 is welded to the top of the screw tube 31.

[0056] The top of the guide sleeve 3 can be welded with a hexagonal head 34. Welding the hexagonal head 34 is used when the thread rotation resistance is large. In some cases where the thread resistance is not large, the guide sleeve 3 without the hexagonal head 24 can be manually screwed to the appropriate position.

[0057] Regardless of the type of guide sleeve 3 used, a nut can be screwed onto the outside of the already positioned guide sleeve 3 and tightly screwed onto the upper surface of the positioning head 28. By using a spare nut, the guide sleeve 3 is fixed in the position of the positioning head 28.

[0058] The straightening mechanism 2 adjusts the position of the entire row of reinforcing bars by means of horizontal bars 25 or vertical bars 24. The hooks 27 are used to adjust the spacing of the entire row of reinforcing bars, which can realize the adjustment of various reinforcing bar arrangement methods. The adjustment process needs to be set according to the position of the precast column drawings.

[0059] When encountering complex rebar distribution or rebar spacing, the length of the column 22 can be increased, nuts can be added upwards, and multiple assembly frames 23 can be assembled. A multi-level staggered assembly method can be adopted to achieve an installation method suitable for interference.

[0060] The dimensions of the cone opening 32 and guide opening 33 inside the guide sleeve 3 can be set in various sizes according to the thickness of the steel bar. Even if the steel bar size changes continuously during use, the guide sleeve 3 can be replaced to achieve adaptive fit.

[0061] The usage process and operation steps of the straightening mechanism 2 in the precast column rebar splicing process are as follows:

[0062] 1. Measurement and layout

[0063] Before construction, surveyors measured and laid out the lines according to the design drawings, arranged the installation surface 11 on the floor slab, and set up the positioning control line 12 as the reference for the installation of precast columns and the fixing of the correction mechanism 2.

[0064] 2. Installation and adjustment of the correction mechanism

[0065] Based on the precast column model and reinforcement layout drawings, select the matching specification of the correction mechanism 2 and install it on the mounting surface 11.

[0066] The longitudinal bar 24 and the transverse bar 25 form an adjustable rectangular frame structure to accommodate precast columns with different cross-sectional dimensions; the positioning head 28 can slide along the longitudinal bar 24 or the transverse bar 25 to adjust its position and is locked by the positioning bolt 29 to adapt to different reinforcement arrangements, so as to achieve precise correction of the reinforcement 13 and ensure that each reinforcement is within the correct axis and spacing.

[0067] 3. Reinforcing bar cleaning and straightening

[0068] After cleaning and straightening the surface of the reserved butt-jointing reinforcing bars 13, the reinforcing bars are inserted sequentially into the limiting holes of the positioning head 28. The positioning head 28 constrains the spatial position of each reinforcing bar, corrects problems such as bending, offset, or inconsistent spacing of the reinforcing bars, and ensures that the position of the end of the reinforcing bars meets the butt-jointing requirements.

[0069] 4. Elevation measurement and leveling

[0070] After the installation of the straightening mechanism 2 and the reinforcement straightening are completed, the horizontal height of the installation surface is measured, and shims are set below the corresponding positions for leveling and adjustment to ensure that the straightening mechanism as a whole maintains a horizontal and stable state, thus providing a guarantee for the subsequent hoisting of precast columns and the connection of reinforcement bars.

[0071] 5. Precast column hoisting and rebar connection

[0072] After the reinforcement is straightened, the precast column is hoisted. During the hoisting process, the reinforcement is precisely aligned with the sleeve hole of the precast column by means of mirror observation, etc. The precast column is slowly lowered so that the reinforcement is smoothly inserted into the sleeve hole under the guidance of the positioning head 28, and the precise connection is completed.

[0073] 6. Support and grouting operations

[0074] After the precast columns are in place, support bases are installed on the floor slab, and adjustable support rods and diagonal braces are used to stably fix the precast columns in the designed positions.

[0075] Then, the gaps at the bottom of the column are sealed to prevent grout leakage. Grouting is performed from the bottom using the pressure grouting method. After the grout is filled and flows out from the grout drain hole, the sealing is completed to ensure a firm connection between the reinforcing bar and the sleeve.

[0076] 7. Settling and Acceptance

[0077] After grouting, allow the grout to stand for at least 24 hours to prevent construction disturbance from affecting the grouting effect. After the standing period, check the precision of the rebar connections and the quality of the grouting. Only after confirming that the construction standards are met can the next step be carried out.

[0078] In summary, this embodiment uses the correction mechanism 2 to flexibly adjust and precisely correct the reinforcing bars 13, adapting to various precast column sizes and reinforcing bar layout requirements, ensuring the accuracy of reinforcing bar connection, and improving grouting density. It has the advantages of strong adaptability, convenient adjustment, and high construction efficiency.

[0079] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0080] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A precast column steel bar butt joint grouting auxiliary alignment device, comprising a mounting preposition (1), characterized in that: The top of the installation surface (11) of the installation site (1) is embedded with butt reinforcing bars (13); The top of the butt reinforcing bar (13) is corrected by a correction device; The correction device comprises a reinforcing bar positioning frame (4), and the upper surface of the reinforcing bar positioning frame (4) is provided with a same number of guide holes (42) as the butt reinforcing bars (13), and the bottom end of each guide hole (42) is provided with a taper hole (43); The bent part of the butt reinforcing bar (13) approaches the center of the taper hole (43) and the guide hole (42) after passing through the taper hole (43).

2. The aligning device for precast column steel bar butt joint grouting according to claim 1, characterized in that: The correction device comprises a correction mechanism (2), and the correction mechanism (2) comprises a fixed frame (21) and an assembly frame (23) arranged in an upper-lower interval, a fixed strip is slidably assembled outside the assembly frame (23), a carabiner (27) is slidably assembled outside the fixed strip, a guide sleeve (3) is screwed at the inner side end of the carabiner (27), a positioning structure is screwed on the outer wall of the fixed strip and the carabiner (27), and the fixed strip and the carabiner (27) are positioned with the assembly frame (23) and the fixed strip through the positioning structure.

3. The aligning device for precast column steel bar butt joint grouting according to claim 1 or 2, characterized in that: A positioning control line (12) is drawn on the upper surface of the installation surface (11) at a position 200mm away from the periphery of the installation position of the prefabricated column.

4. The aligning device for precast column steel bar butt joint grouting according to claim 2, characterized in that: A stand (22) is arranged above the fixed frame (21), mounting holes are arranged on the outer surface of the assembly frame (23) and the corresponding position of the stand (22), and nuts are screwed at the top end of the stand (22) penetrating the mounting holes.

5. The aligning device for precast column steel bar butt joint grouting according to claim 2, characterized in that: The fixed strip comprises a longitudinal strip (24) and a transverse strip (25), the two sides of the transverse strip (25) and the longitudinal strip (24) are provided with hook claws, screw holes are arranged on the outer side of the hook claws, and the hook claws are positioned with the assembly frame (23) through the screw holes.

6. The aligning device for precast column steel bar butt joint grouting according to claim 5, characterized in that: The inner side of the hook claw of the transverse strip (25) is welded with a pad (26), and the thickness of the pad (26) is greater than the thickness of the longitudinal strip (24).

7. The aligning device for precast column steel bar butt joint grouting according to claim 2, characterized in that: The carabiner (27) comprises a U-shaped fixed buckle, a positioning head (28) is welded at the bottom end of the fixed buckle, an internal thread is arranged in the positioning head (28), and the guide sleeve (3) is screwed in the internal thread.

8. The aligning device for precast column steel bar butt joint grouting according to claim 2, characterized in that: The guide sleeve (3) comprises a screw pipe (31), a thread is arranged on the outer side of the screw pipe (31), a taper hole (32) is arranged at the bottom end of the inner side of the screw pipe (31), and a guide hole (33) is arranged at the top end of the screw pipe (31).

9. The aligning device for precast column steel bar butt joint grouting according to claim 8, characterized in that: A hexagonal head (34) is welded at the top end of the screw pipe (31).

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