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CN-121976637-A - Reinforcing steel bar axial connecting piece and connecting method

CN121976637ACN 121976637 ACN121976637 ACN 121976637ACN-121976637-A

Abstract

The invention discloses a steel bar axial connecting piece and a connecting method, which relate to the technical field of building steel bar connection and comprise a steel bar main body, wherein one end of the steel bar main body is inserted with an upper connecting piece, the bottom of the upper connecting piece is connected with a lower connecting piece in a threaded manner, the bottom of the lower connecting piece is inserted with another steel bar main body, the middle part of the top end of the upper connecting piece is provided with a first jack, the middle part of the bottom end of the lower connecting piece is provided with a second jack, the lower parts of the two sides of the upper connecting piece are provided with first vertical grooves, the upper parts of the two sides of the lower connecting piece are provided with second vertical grooves, the first vertical grooves and the second vertical grooves are respectively inserted with a squeezing plate, and a definite tightening amount judging standard is established by means of a wedge-shaped squeezing principle through a matching structure of the front end inclined plane of the squeezing strips and the cambered surface of the steel bar, so that accurate control and stress stable control of the tightening degree of the connecting piece are realized, and the problem of insufficient tightening or excessive tightening is avoided by replacing the subjective operation mode of experience of a traditional worker.

Inventors

  • CUI LIZHI
  • LENG FEI
  • XIE HONGPING
  • ZHANG LICHUN
  • LIN ZIYING

Assignees

  • 山东鲁铁众合工程科技有限公司

Dates

Publication Date
20260505
Application Date
20260203

Claims (7)

  1. 1. The axial connecting piece for the steel bar comprises a steel bar main body (1) and is characterized in that one end of the steel bar main body (1) is inserted with an upper connecting piece (2), the bottom of the upper connecting piece (2) is connected with a lower connecting piece (3) in a threaded manner, and the bottom of the lower connecting piece (3) is inserted with another steel bar main body (1); the two sides of the upper connecting piece (2) are provided with first vertical grooves (203) below, the two sides of the lower connecting piece (3) are provided with second vertical grooves (303) above, the first vertical grooves (203) and the second vertical grooves (303) are respectively internally inserted with an extrusion plate (5), one side of each extrusion plate (5) is symmetrically provided with extrusion strips (501), and the front ends of the extrusion strips (501) are attached to the outer side face of the steel bar main body (1); The inner side surfaces of the front ends of the extrusion strips (501) are inclined planes, the front ends of the extrusion strips are attached to the outer peripheral surface of the steel bar main body (1), and the contact ends of the extrusion strips (501) and the steel bar main body (1) are cambered surfaces; The extrusion plate (5) moves horizontally in the first vertical groove (203) and the second vertical groove (303) under the action of external force, so that the extrusion strip (501) is driven to be extruded with the outer side face of the steel bar main body (1), the extrusion strip (501) is extruded into a side gap between the steel bar main body (1) and the first jack (201) and the second jack (301) due to the inclined face of the front end of the extrusion strip (501) and the cambered surface structure of the periphery of the steel bar main body (1), and after one face of the extrusion plate (5) is flush with the side faces of the upper connecting piece (2) and the lower connecting piece (3), the extrusion strip (501) is stopped to be inserted, so that the insertion amount of the steel bar main body (1) of each extrusion strip (501) is ensured to be the same.
  2. 2. The axial connecting piece for reinforcing steel bars according to claim 1, wherein a first jack (201) communicated with the first vertical groove (203) is formed in the middle of the top end of the upper connecting piece (2), and a second jack (301) communicated with the second vertical groove (303) is formed in the middle of the bottom end of the lower connecting piece (3).
  3. 3. The steel bar axial connecting piece according to claim 1, wherein a magnetic attraction block (503) is arranged at one corner of the top end of the extrusion plate (5).
  4. 4. The axial connecting piece for reinforcing steel bars according to claim 1, wherein a plurality of protruding strips (502) are formed on the inner side surface of the extrusion strip (501) at equal intervals, and the inclination angle of the protruding strips (502) is opposite to the inclination angle of the threads on the outer surface of the reinforcing steel bar main body (1).
  5. 5. The axial connecting piece for reinforcing steel bars according to claim 2, wherein a threaded hole (202) communicated with the first insertion hole (201) is formed in the middle of the bottom of the upper connecting piece (2), and a first limit groove (2010) for assisting in inserting the reinforcing steel bars is formed in the inner peripheral side surface of the first insertion hole (201).
  6. 6. The axial connecting piece for reinforcing steel bars according to claim 1, wherein a threaded column (302) in threaded connection with the threaded hole (202) is arranged in the middle of the top end of the lower connecting piece (3), and a second limiting groove (3010) for assisting in inserting the reinforcing steel bars is formed in the inner peripheral side surface of the second insertion hole (301).
  7. 7. The method for connecting a reinforcing bar axial connector according to claim 1, applied to any one of the reinforcing bar main bodies 1 to 6, characterized by comprising the steps of: s1, firstly, respectively inserting extrusion plates (5) into second vertical grooves (303) formed on two sides of a lower connecting piece (3), under the action of a magnetic suction block (503) at one corner of the top of the extrusion plates (5), fixing the extrusion plates (5) in the second vertical grooves (303), then pushing the extrusion plates (5) to enable the top ends of the extrusion plates (5) to be positioned on the same horizontal plane with the bottom surface of the lower connecting piece (3), then, inserting second insertion holes (301) at the bottom of the lower connecting piece (3) into one end of a reinforcing steel bar main body (1), fixing the insertion angle of the reinforcing steel bar main body (1) under the action of a second limiting groove (3010), wherein the friction force can lead to displacement of the extrusion plates (5) due to the fact that the outer surface of the reinforcing steel bar main body (1) is contacted with the front end reinforcing steel bar main body (1) of the pressing plates (503), and resetting the extrusion plates (5), S2, fixing the upper connecting piece (2) to the upper connecting piece (3) through a threaded hole (202) at the bottom of the upper connecting piece (2) and the second vertical groove (303) at the top of the lower connecting piece (3), then, fixing the upper connecting piece (2) to the two sides of the reinforcing steel bar main body (203) by the step of pressing, and S3, placing the jaw of the hydraulic pliers on the side surface of the extrusion plate (5), and shrinking the hydraulic pliers through a hydraulic system to push the extrusion plate (5) to move inwards, so that the extrusion strip (501) is extruded into a side gap between the steel bar main body (1) and the first jack (201) and between the extrusion strip and the second jack (301), and loosening the jaw when the jaw is abutted against the side surfaces of the upper connecting piece (2) and the lower connecting piece (3), so as to ensure that the insertion amount of the steel bar main body (1) of each extrusion strip (501) is the same, thereby achieving the effect of locking the steel bar main body (1).

Description

Reinforcing steel bar axial connecting piece and connecting method Technical Field The invention relates to the technical field of construction steel bar connection, in particular to a steel bar axial connecting piece and a connecting method. Background With the continuous development of society, novel building technologies and materials in the building industry of China are continuously and iteratively upgraded, and the prefabricated building technology realizes high-speed development by virtue of the advantages of high efficiency, environmental protection and the like. In prefabricated building, the connection reliability of the prefabricated components directly determines the safety performance of the building structure, if the connection mode has defects, huge potential safety hazards are buried, wherein the steel bar connection is used as a core link of the connection of the prefabricated components, various connection modes exist, and the steel bar sleeve connection is the most common connection mode in the current application due to the characteristics of strong adaptability, wide application scene and the like. The current general reinforcing bar sleeve connection technique that adopts exists a great deal of urgent problem that waits to solve, in actual work progress, when carrying out tightening operation through hydraulic system centre gripping sleeve, lack clear tightening amount decision criterion, can't carry out accurate accuse to telescopic tightening degree, often rely on workman's past experience to carry out subjective judgement in the work progress, this kind of empirical mode of operation very easily produces the error, result in different constructors, the sleeve tightening degree of different construction points to have the difference, partial junction point position probably is because of tightening up inadequately appears not hard up, partial then probably because of tightening up excessively causes sleeve or reinforcing bar damage, and then cause the uneven problem of whole connection quality, bring potential safety risk for building structure. Therefore, it is necessary to provide a reinforcing bar axial connector and a connecting method for solving the above problems. Disclosure of Invention Aiming at the defects of the prior art, the invention provides the steel bar axial connecting piece and the connecting method, and solves the problems that the traditional steel bar sleeve connection relies on the experience of workers to perform subjective operation, so that different constructors and different construction points are different in tightening degree, and the tightening is insufficient and loose, and the sleeve or the steel bar is damaged due to excessive tightening. Technical proposal The technical scheme is that the steel bar axial connecting piece comprises a steel bar main body and is characterized in that one end of the steel bar main body is inserted with an upper connecting piece, the bottom of the upper connecting piece is connected with a lower connecting piece in a threaded manner, and the bottom of the lower connecting piece is inserted with another steel bar main body; the two sides of the upper connecting piece are respectively provided with a first vertical groove, the two sides of the lower connecting piece are respectively provided with a second vertical groove, the first vertical grooves and the second vertical grooves are respectively internally inserted with an extrusion plate, one side of each extrusion plate is symmetrically provided with extrusion strips, and the front ends of the extrusion strips are attached to the outer side surfaces of the steel bar main bodies; the inner side surfaces of the front ends of the extrusion strips are inclined planes, the front ends of the extrusion strips are attached to the outer peripheral surface of the steel bar main body, and the contact ends of the extrusion strips and the steel bar main body are cambered surfaces; The extrusion plate moves horizontally in the first vertical groove and the second vertical groove under the action of external force, so that the extrusion strip is driven to extrude with the outer side face of the steel bar main body, and the extrusion strip is extruded into a side gap between the steel bar main body and the first jack as well as between the second jack due to the cambered surface structure of the inclined plane of the front end of the extrusion strip and the periphery of the steel bar main body. Further, a first jack communicated with the first vertical groove is formed in the middle of the top end of the upper connecting piece, and a second jack communicated with the second vertical groove is formed in the middle of the bottom end of the lower connecting piece. Further, a magnetic block is arranged at one corner of the top end of the extrusion plate. Further, a plurality of protruding strips are equidistantly arranged on the inner side face of the extrusion strip, and the inclined ang