CN213793945U

CN213793945U - Pile head reinforcing steel bar straightening device

Info

Publication number: CN213793945U
Application number: CN202022750109.0U
Authority: CN
Inventors: 邓佳星; 王存帅
Original assignee: China Metallurgical Construction Engineering Group Co Ltd
Current assignee: China Metallurgical Construction Engineering Group Co Ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-07-27
Anticipated expiration: 2030-11-24

Abstract

The utility model discloses a pile head reinforcing bar straightener, including fixed ring cover and aligning ring cover, the cover of fixed ring cover is on one's body around the even interval screw-thread fit in its central line direction and has fixing stud, fixing stud can stretch into in fixed ring cover, aligning ring cover is gone up and is worn to be equipped with many direction slide bars around the even interval of its central line direction, the central line direction of direction slide bar is on a parallel with the central line direction of aligning ring cover, aligning ring cover can be followed direction slide bar central line direction rather than sliding fit, one side that aligning ring cover was kept away from to aligning ring cover is provided with supporting platform, fixed connection is on fixed ring cover and supporting platform respectively at the both ends of direction slide bar, aligning ring cover has and treats aligning reinforcing bar clearance fit and carries out the aligning hole of aligning in order to be used for treating the aligning reinforcing bar. The utility model discloses simple structure can conveniently carry out the aligning to the pile head reinforcing bar and handle, has improved the efficiency of construction.

Description

Pile head reinforcing steel bar straightening device

Technical Field

The utility model relates to a reinforcing bar straightener, concretely relates to pile head reinforcing bar straightener.

Background

Pile head marks are higher than design elevations when the cast-in-place pile is constructed according to the standard, and the pile head marks need to be manually removed to ensure the strength of a pile body. The pile body reinforcing steel bars are prone to bending after manual removal, and on-site common methods are that workers directly straighten pile head reinforcing steel bars, so that construction is very inconvenient, particularly straightening of large-diameter reinforcing steel bars is extremely difficult, straightening speed of manual plates is low, and efficiency is low.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide a convenient pile head reinforcing bar straightener to straightening, straightening efficiency is high.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a pile head reinforcing steel bar straightening device comprises a fixed ring sleeve and a straightening ring sleeve which are arranged on the same central line, the inner diameter of the fixed ring sleeve is larger than the diameter of a reinforcing steel bar to be straightened, at least three fixed screw holes are uniformly arranged on the sleeve body of the fixed ring sleeve at intervals around the central line direction of the fixed ring sleeve, the fixed screw holes are through holes, the central line of each fixed screw hole extends along the radial direction of the fixed ring sleeve, the central lines of all the fixed screw holes are positioned on the same plane, a fixed screw bolt matched with the fixed screw hole in a threaded manner is arranged at the position of each fixed screw bolt, the fixed screw bolt faces one end of an inner hole of the fixed ring sleeve and can extend into the inner hole of the fixed ring sleeve, a plurality of guide slide bars are uniformly arranged on the straightening ring sleeve at intervals around the central line direction of the guide slide bars, the central line direction of each guide slide bar is parallel to the central line direction of the straightening ring sleeve, the straightening ring sleeve can be matched with the guide slide bars in a sliding manner along the central line direction of the straightening slide bars, and a supporting platform is arranged on one side of the straightening ring sleeve far away from the fixed ring sleeve, two ends of the guide slide rod are respectively and fixedly connected to the fixed ring sleeve and the supporting platform, and the straightening ring sleeve is provided with a straightening inner hole which is in clearance fit with the steel bar to be straightened and is used for straightening the steel bar to be straightened.

The utility model discloses in, when using, remove the butt at fixed ring cover with straightening ring cover earlier, then fixed ring cover and straightening ring cover embolia from the top of reinforcing bar in proper order to the position of landing to reinforcing bar bottom, the pile head exposes its bottom deformation range minimum of reinforcing bar generally, consequently as the location benchmark. The fixed stud is screwed to enable the fixed stud to abut against the reinforcing steel bar in the fixed ring sleeve to complete mutual fixation between the fixed ring sleeve and the reinforcing steel bar, then the straightening ring sleeve is lifted towards the direction far away from the fixed ring sleeve, the straightening ring sleeve and the fixed ring sleeve are concentric, and meanwhile, the supporting and restraining of the guide sliding column are provided, and the inner hole of the straightening ring sleeve is in clearance fit with the reinforcing steel bar, so that the bent reinforcing steel bar can be corrected in the moving process of the straightening ring sleeve, the reinforcing steel bar can pass through the inner hole of the straightening ring sleeve, and finally, the straightening ring sleeve moves to the top of the reinforcing steel bar to complete the straightening operation of the reinforcing steel bar.

Preferably, the straightening ring sleeve is provided with a lifting block protruding outwards, an external connecting block is arranged on one side of the lifting block opposite to the straightening inner hole, the external connecting block is detachably connected to the lifting block, lifting grooves which are opposite to each other and extend along the direction parallel to the central line of the straightening ring sleeve are respectively arranged on the side surfaces of the lifting block opposite to the external connecting block, the lifting grooves are through grooves, when the external connecting block is connected to the lifting block, the two lifting grooves can be folded to form a lifting hole, a lifting thread from one end to the other end is arranged on the inner wall of the lifting hole along the central line direction of the lifting hole, the projection of the lifting hole along the central line direction of the supporting platform is positioned outside the projection of the supporting platform along the central line direction of the lifting hole and the projection of the fixing ring sleeve along the central line direction of the lifting hole, and an adjusting slide rod is fixedly connected to the outer side of the supporting platform and the corresponding to the lifting block, the central line direction of the upper adjusting slide rod extends along the opposite direction of the two lifting grooves, the position of the fixed ring sleeve, corresponding to the upper adjusting slide rod, is fixedly connected with the lower adjusting slide rod, the central line direction of the lower adjusting slide rod is parallel to the central line direction of the upper adjusting slide rod, the central line of the lower adjusting slide rod and the central line of the lifting hole are positioned on the same plane, the upper adjusting slide rod and the lower adjusting slide rod are respectively sleeved with an adjusting slide sleeve which can be in sliding fit with the upper adjusting slide rod along the central line direction of the upper adjusting slide rod, a lifting screw rod which extends along the direction parallel to the central line direction of the lifting hole is arranged between the two adjusting slide sleeves, the central line of the lifting screw rod is respectively positioned on the same plane with the central lines of the upper adjusting slide rod and the lower adjusting slide rod, one end of the lifting screw rod, facing the upper adjusting slide rod, is convexly provided with a twisting part along the central line direction of the upper adjusting slide rod, the twisting part is provided with at least two twisting surfaces which are parallel to the central line of the lifting screw rod, so as to facilitate the adjustment of the twisting part The lifting screw is twisted and rotated, one end of the twisting part far away from the lifting screw is formed with an upper rotating part along the direction of the central line of the end, the lifting screw faces to one end of the lower adjusting slide rod and is formed with a lower rotating part along the direction of the central line of the end, the upper rotating part and the lower rotating part are respectively connected to the adjusting slide sleeve on one side of the upper rotating part and the lower rotating part in a rotating mode so that the lifting screw can rotate around the direction of the central line of the adjusting slide sleeve, and the lifting screw can be arranged in a lifting hole in a moving mode and is in threaded fit with the straightening ring sleeve in a moving mode.

Before straightening the reinforcing bar, remove first the outer joint block, the lifting screw that slides moves towards keeping away from straightening ring cover direction, and straightening ring cover just can move and be close to the position to the reinforcing bar bottom like this. When the steel bar is straightened, the lifting screw rod is slid to move towards the straightening ring sleeve, the lifting screw rod is arranged in the lifting groove on the lifting block, the thread on the lifting screw rod is matched with the lifting thread in the lifting groove on the lifting block, and then the external connecting block is arranged, so that the lifting screw rod is matched with the thread of the straightening ring sleeve through the lifting thread. When the lifting screw is screwed, the straightening ring sleeve can move along the direction parallel to the central line of the lifting screw, so that the straightening ring sleeve straightens the steel bar.

As optimization, the straightening inner hole comprises a straightening front hole and a straightening rear hole which are arranged on the same central line, the straightening front hole is arranged on one side of the supporting platform, the diameter of the straightening front hole is larger than that of the straightening rear hole, a straightening inner sleeve is embedded in the straightening front hole and is arranged on the same central line with the straightening front hole, one end, facing the straightening rear hole, of the straightening inner sleeve abuts against the bottom of the straightening front hole, the length of the straightening inner sleeve along the central line direction is consistent with that of the straightening front hole along the central line direction, the inner hole of the straightening inner sleeve is used for straightening reinforcing steel bars, and the inner diameter of the straightening inner sleeve is smaller than that of the straightening rear hole; the inner wall of the straightening front hole is symmetrically provided with two vertical grooves by taking the center line of the straightening front hole as a symmetry axis, the vertical grooves extend in the direction parallel to the center line of the straightening front hole, one end of each vertical groove extends to the bottom of the straightening front hole, the other end of each vertical groove is communicated with the straightening ring sleeve, the hole bottom of the straightening front hole and the position corresponding to each vertical groove are provided with a transverse groove in the direction of the hole diameter of the straightening front hole in an extending manner, the transverse groove is communicated with the corresponding vertical groove to form an L-shaped bent groove, a vertical rod extending in the extending direction of the vertical groove is accommodated in each vertical groove, the length of each vertical rod is larger than that of each vertical groove, each vertical rod can be in sliding fit with the vertical groove in the extending direction of the vertical groove, one end, facing towards the straightening rear hole, of each vertical rod is bent in the extending direction of the transverse groove to form a transverse rods, the transverse rods are accommodated in the transverse grooves, one end, on the side of the straightening ring sleeve, where the straightening front hole is provided with an arched pull handle, the two ends of the arched pull handle are respectively hinged with one ends extending out of the two vertical rods outside the straightening vertical rods through hinge shafts, the two hinge shafts are arranged along the direction parallel to the central line of the cross rod and have the same central line, and when the arched pull handle rotates to the position where the plane is vertical to the central line of the straightening ring sleeve, the projection of the arched pull handle along the direction vertical to the central line of the straightening ring sleeve is positioned outside the projection of the straightening inner sleeve along the direction of the central line of the straightening ring sleeve.

In order to avoid the straightening inner sleeve from shaking in the straightening front hole, the tolerance fit between the straightening inner sleeve and the straightening front hole is small, when the straightening inner sleeve is embedded in the straightening front hole and needs to be taken out, the straightening inner sleeve needs to be drawn outside, the direction of the drawing force is difficult to be parallel to the direction of the central line of the straightening front hole, once deviation occurs, the contact between the straightening inner sleeve and the straightening front hole is increased, and the difficulty in taking out the straightening inner sleeve is further increased. In the utility model, before the inner straightening sleeve is embedded, the vertical rod is firstly placed in the vertical groove, the cross rod at the front end of the vertical rod is placed in the cross groove, the vertical rod and the cross rod can not interfere with the embedding of the inner straightening sleeve, when the inner straightening sleeve needs to be taken out, the arched pull handle is rotated and then pulled, the arched pull handle can change the direction of the acting force applied by a part of operators, after the acting force is transmitted to the vertical rod, the vertical rod can be in sliding fit along the extension direction of the vertical groove, the direction of the acting force is further changed, therefore, the cross rod below the vertical rod can only receive the acting force along the extension direction of the cross rod and the extension direction of the vertical rod, and the cross rod is positioned below the inner straightening sleeve, therefore, the acting force along the extension direction of the cross rod can not interfere with the inner straightening sleeve, the inner straightening sleeve can only receive the acting force along the extension direction of the vertical rod, thus, the excessive contact between the inner straightening sleeve and the straightening front hole is avoided, the straightening inner sleeve can be taken out more easily.

And optimally, an arc-shaped chamfer is arranged at the orifice of the inner hole at one end of the straightening inner sleeve, which is far away from the straightened hole. The steel bar is a ribbed steel bar, and the chamfer of the inner hole opening of the straightening inner sleeve is easy to interfere with the steel bar rib on the inclined steel bar, so that the clamping condition can occur. And the arc surface of the arc chamfer provides a transition surface for the reinforcing steel bar, so that the reinforcing steel bar can smoothly enter the inner hole of the straightening inner sleeve.

And optimally, a plurality of annular oil grooves which are the same as the center line of the straightening front hole are uniformly arranged on the inner wall of the straightening front hole along the direction of the center line of the straightening front hole at intervals, and the annular oil grooves are communicated with the vertical grooves. After the straightening inner sleeve is arranged in the straightening front hole, the straightening inner sleeve is affected by the environment and rusted, and the rusted oxides increase the difficulty in taking out the straightening inner sleeve. The utility model discloses in, through to pouring into lubricating oil in the vertical hole, lubricating oil will enter into annular oil groove, through capillary phenomenon, lubricating oil just can be to the clearance infiltration between aligning front aperture and the aligning endotheca, for it provides lubrication, conveniently aligns the endotheca and takes out.

To sum up, the beneficial effects of the utility model reside in that: the utility model discloses simple structure can conveniently carry out the aligning to the pile head reinforcing bar and handle, has improved the efficiency of construction.

Drawings

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural view of the present invention;

figure 2 is a cross-sectional view of the middle straightening ring sleeve of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, the pile head reinforcing steel bar straightening device in this embodiment includes a fixed ring sleeve 1 and a straightening ring sleeve 2 which are arranged on the same central line, the inner diameter of the fixed ring sleeve 1 is larger than the diameter of the reinforcing steel bar to be straightened, at least three fixing screw holes are uniformly arranged on the sleeve body of the fixed ring sleeve 1 at intervals around the central line direction, the fixing screw holes are through holes, the central lines of the fixing screw holes extend along the radial direction of the fixed ring sleeve, the central lines of all the fixing screw holes are located on the same plane, fixing screw bolts 3 which are in threaded fit with the fixing screw holes are arranged at the fixing screw holes, one end of the fixing screw bolts 3 facing the inner hole of the fixed ring sleeve 1 can extend into the inner hole of the fixed ring sleeve 1, a plurality of guide slide bars 4 are uniformly arranged on the straightening ring sleeve 2 at intervals around the central line direction, the central line direction of the guide slide bars 4 is parallel to the central line direction of the straightening ring sleeve 2, the straightening ring sleeve 2 can be in sliding fit with the central line direction of the guide slide bars 4, one side of the straightening ring sleeve 2, which is far away from the fixed ring sleeve 1, is provided with a supporting platform 5, two ends of the guide slide rod 4 are respectively and fixedly connected to the fixed ring sleeve 1 and the supporting platform 5, and the straightening ring sleeve 2 is provided with a straightening inner hole which is in clearance fit with the steel bar to be straightened and is used for straightening the steel bar to be straightened.

In the specific embodiment, the sleeve body of the straightening ring sleeve 2 protrudes outwards to form a lifting block, one side of the lifting block, which is back to the straightening inner hole, is provided with an external connecting block 6, the external connecting block 6 is detachably connected to the lifting block, the side surfaces of the lifting block, which are opposite to the external connecting block 6, are respectively provided with lifting grooves 7 which are opposite and extend along the direction parallel to the central line of the straightening ring sleeve 2, the lifting grooves 7 are through grooves, when the external connecting block 6 is connected to the lifting block, the two lifting grooves 7 can be folded to form a lifting hole, the inner wall of the lifting hole is provided with a lifting thread from one end to the other end along the central line direction thereof, the projection of the lifting hole along the central line direction thereof is positioned outside the projection of the supporting platform 5 along the central line direction of the lifting hole and the projection of the fixed ring sleeve 1 along the central line direction of the lifting hole, the position of the outer side of the supporting platform 5, which corresponds to the, the central line direction of the upper adjusting slide bar 8 extends along the opposite direction of the two lifting grooves 7, the position of the fixing ring sleeve 1, which is on the sleeve body and corresponds to the upper adjusting slide bar 8, is fixedly connected with a lower adjusting slide bar 9, the central line direction of the lower adjusting slide bar 9 is parallel to the central line direction of the upper adjusting slide bar 8, the central line of the lower adjusting slide bar 9 and the central line of the lifting hole are positioned on the same plane, the upper adjusting slide bar 8 and the lower adjusting slide bar 9 are respectively sleeved with an adjusting slide sleeve 10 which can be in sliding fit with the upper adjusting slide bar along the central line direction, a lifting screw 11 which extends along the central line direction of the lifting hole is arranged between the two adjusting slide sleeves 10, the central line of the lifting screw 11 is respectively positioned on the same plane with the central lines of the upper adjusting slide bar 8 and the lower adjusting slide bar 9, a twisting part is convexly formed towards one end of the upper adjusting slide bar 8 along the central line direction of the lifting screw 11, the twisting part is provided with at least two twisting surfaces which are parallel to each other and parallel to the central line of the lifting screw rod 11 so as to facilitate twisting operation of the lifting screw rod 11, the end, away from the lifting screw rod 11, of the twisting part is provided with an upper rotating part along the direction of the central line in a protruding manner, the end, facing the lower adjusting slide rod 9, of the lifting screw rod 11 is provided with a lower rotating part along the direction of the central line in a protruding manner, the upper rotating part and the lower rotating part are respectively connected onto the adjusting slide sleeve 10 on one side where the lifting screw rod 11 is located in a rotating manner so as to enable the lifting screw rod 11 to rotate around the direction of the central line, and the lifting screw rod 11 can be movably arranged in the lifting hole and is in threaded fit with the straightening ring sleeve 2 through lifting threads.

In the specific embodiment, the straightening inner hole comprises a straightening front hole and a straightening rear hole which are arranged on the same central line, the straightening front hole is positioned on one side of the supporting platform 5, the diameter of the straightening front hole is larger than that of the straightening rear hole, a straightening inner sleeve 12 is embedded in the straightening front hole and is arranged on the same central line with the straightening front hole, one end, facing the straightening rear hole, of the straightening inner sleeve 12 abuts against the bottom of the straightening front hole, the length of the straightening inner sleeve 12 in the direction of the central line of the straightening inner sleeve is consistent with that of the straightening front hole in the direction of the central line of the straightening front hole, the inner hole of the straightening inner sleeve 12 is used for straightening reinforcing steel bars, and the inner diameter of the straightening inner sleeve 12 is smaller than that of the straightening rear hole; the inner wall of the straightening front hole is symmetrically provided with two vertical grooves by taking the center line of the straightening front hole as a symmetry axis, the vertical grooves extend in the direction parallel to the center line of the straightening front hole, one end of each vertical groove extends to the bottom of the straightening front hole, the other end of each vertical groove is communicated with the outside of the straightening ring sleeve 2, the hole bottom of the straightening front hole and the position corresponding to each vertical groove are provided with a transverse groove in the direction of the hole diameter of the straightening front hole, the transverse groove is communicated with the corresponding vertical groove to form an L-shaped bent groove, a vertical rod 13 extending in the extending direction of the vertical groove is accommodated in each vertical groove, the length of each vertical rod 13 is larger than that of each vertical groove, each vertical rod 13 can be in sliding fit with the vertical grooves in the extending direction, one end, facing the straightening rear hole, of each vertical rod 13 is bent in the extending direction of the transverse groove to form a transverse rod 14, the transverse rod 14 is accommodated in the transverse groove, one end, on the side, of the straightening ring sleeve 2, where the straightening front hole is located, is provided with an arched pull handle 15, two ends of an arched pull handle 15 are respectively hinged with one end of two vertical rods 13 extending out of the straightening ring sleeve 2 through hinge shafts, the two hinge shafts are arranged on the same central line and along the direction parallel to the central line of the cross rod 14, and when the arched pull handle 15 rotates to the position where the plane is perpendicular to the central line of the straightening ring sleeve 2, the projection of the arched pull handle 15 along the direction perpendicular to the central line of the straightening ring sleeve 2 is positioned outside the projection of the straightening inner sleeve 12 along the direction of the central line of the straightening ring sleeve 2.

In this embodiment, an arc-shaped chamfer is arranged at an inner hole opening of one end of the straightening inner sleeve 12 far away from the straightened hole.

In this specific embodiment, a plurality of annular oil grooves having the same center line as the straightening front hole are uniformly arranged on the inner wall of the straightening front hole at intervals along the direction of the center line of the straightening front hole, and the annular oil grooves are communicated with the vertical groove.

Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, while the invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The pile head reinforcing steel bar straightening device is characterized in that: the steel bar straightening device comprises a fixed ring sleeve and a straightening ring sleeve which are arranged along the same central line, wherein the inner diameter of the fixed ring sleeve is larger than the diameter of a steel bar to be straightened, at least three fixed screw holes are uniformly arranged on the sleeve body of the fixed ring sleeve at intervals around the central line direction of the fixed ring sleeve, the fixed screw holes are through holes, the central lines of all the fixed screw holes are positioned on the same plane, fixed screw bolts matched with the fixed screw holes in a threaded manner are arranged in the fixed screw holes, the fixed screw bolts face one end of an inner hole of the fixed ring sleeve and can extend into the inner hole of the fixed ring sleeve, a plurality of guide slide bars are uniformly arranged on the straightening ring sleeve at intervals around the central line direction of the straightening ring sleeve, the central line direction of each guide slide bar is parallel to the central line direction of the straightening ring sleeve, the straightening ring sleeve can be in sliding fit with the central line direction of each guide slide bar, and a supporting platform is arranged on one side of the straightening ring sleeve, which is far away from the fixed ring sleeve, two ends of the guide slide rod are respectively and fixedly connected to the fixed ring sleeve and the supporting platform, and the straightening ring sleeve is provided with a straightening inner hole which is in clearance fit with the steel bar to be straightened and is used for straightening the steel bar to be straightened.

2. The pile head rebar straightening device according to claim 1, characterized in that: the outer side of the supporting platform and the position corresponding to one side of the lifting block are fixedly connected with an upper adjusting slide bar, the central line direction of the upper adjusting slide bar is arranged along the opposite direction of the two lifting grooves, the position, corresponding to the upper adjusting slide bar, of the sleeve body of the fixed ring sleeve is fixedly connected with a lower adjusting slide bar, the central line direction of the lower adjusting slide bar is parallel to the central line direction of the upper adjusting slide bar, the central line of the lower adjusting slide bar and the central line of the lifting hole are positioned on the same plane, the upper adjusting slide bar and the lower adjusting slide bar are respectively sleeved with an adjusting sliding sleeve which can be in sliding fit with the upper adjusting slide bar along the central line direction of the upper adjusting slide bar, a lifting screw rod which extends along the direction parallel to the central line direction of the lifting hole is arranged between the two adjusting sliding sleeves, the central line of the lifting screw rod is respectively positioned on the same plane as the central lines of the upper adjusting slide bar and the lower adjusting slide bar, one end, facing towards the upper adjusting slide bar, of the lifting screw rod is convexly provided with a twisting part along the central line direction of the lifting screw rod, the twisting part is provided with at least two twisting surfaces which are parallel to the central line of the lifting screw rod so as to facilitate the twisting operation of the lifting screw rod, twist the portion of changeing and keep away from the one end of lifting screw and be formed with the portion of rotating up along its central line direction arch, the lifting screw orientation in the one end of adjusting the slide bar down be formed with down the portion of rotating along its central line direction arch, go up the portion of rotating and rotate respectively with lower portion of rotating and connect in order to make the lifting screw rotate around its central line direction on the regulation slide bar on one side of its place, the lifting screw in order to move arrange in the lifting hole and through promoting the screw thread with straightening ring cover screw-thread fit.

3. The pile head rebar straightening device according to claim 1, characterized in that: the straightening inner hole comprises a straightening front hole and a straightening rear hole which are arranged on the same central line, the straightening front hole is arranged on one side of the supporting platform, the diameter of the straightening front hole is larger than that of the straightening rear hole, a straightening inner sleeve is embedded in the straightening front hole and is arranged on the same central line with the straightening front hole, one end, facing the straightening rear hole, of the straightening inner sleeve abuts against the bottom of the straightening front hole, the length of the straightening inner sleeve along the central line direction of the straightening inner sleeve is consistent with that of the straightening front hole along the central line direction of the straightening front hole, the inner hole of the straightening inner sleeve is used for straightening reinforcing steel bars, and the inner diameter of the straightening inner sleeve is smaller than that of the straightening rear hole; the inner wall of the straightening front hole is symmetrically provided with two vertical grooves by taking the center line of the straightening front hole as a symmetry axis, the vertical grooves extend in the direction parallel to the center line of the straightening front hole, one end of each vertical groove extends to the bottom of the straightening front hole, the other end of each vertical groove is communicated with the straightening ring sleeve, the hole bottom of the straightening front hole and the position corresponding to each vertical groove are provided with a transverse groove in the direction of the hole diameter of the straightening front hole in an extending manner, the transverse groove is communicated with the corresponding vertical groove to form an L-shaped bent groove, a vertical rod extending in the extending direction of the vertical groove is accommodated in each vertical groove, the length of each vertical rod is larger than that of each vertical groove, each vertical rod can be in sliding fit with the vertical groove in the extending direction of the vertical groove, one end, facing towards the straightening rear hole, of each vertical rod is bent in the extending direction of the transverse groove to form a transverse rods, the transverse rods are accommodated in the transverse grooves, one end, on the side of the straightening ring sleeve, where the straightening front hole is provided with an arched pull handle, the two ends of the arched pull handle are respectively hinged with one ends extending out of the two vertical rods outside the straightening vertical rods through hinge shafts, the two hinge shafts are arranged along the direction parallel to the central line of the cross rod and have the same central line, and when the arched pull handle rotates to the position where the plane is vertical to the central line of the straightening ring sleeve, the projection of the arched pull handle along the direction vertical to the central line of the straightening ring sleeve is positioned outside the projection of the straightening inner sleeve along the direction of the central line of the straightening ring sleeve.

4. The pile head rebar straightening device according to claim 3, characterized in that: and an arc-shaped chamfer is arranged at the orifice of the inner hole at one end of the straightening inner sleeve, which is far away from the straightening back hole.

5. The pile head rebar straightening device according to claim 3, characterized in that: and a plurality of annular oil grooves which are the same as the center line of the straightening front hole are uniformly arranged on the inner wall of the straightening front hole along the direction of the center line of the straightening front hole at intervals, and the annular oil grooves are communicated with the vertical grooves.