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CN-224213638-U - Sleeve, connecting structure, reinforcing steel bar, prefabricated component and assembly

CN224213638UCN 224213638 UCN224213638 UCN 224213638UCN-224213638-U

Abstract

The utility model relates to a sleeve steel bar connecting structure which comprises a steel bar to be connected and a sleeve, wherein an expanding head is arranged at the end of the steel bar, the sleeve comprises a cylinder body and an end cover assembled on the end of the cylinder body through threads, the end cover comprises an outer ring body and an end plate, a through hole larger than the diameter of the steel bar is formed in the middle of the end plate, the end plate vertically extends inwards at the through hole to form an inner ring body, the inner ring body stretches into the cylinder body, the inner diameter of the inner ring body is smaller than the diameter of the expanding head, the steel bar stretches into the cylinder body, and after the end cover is assembled, the expanding head is abutted tightly by the inner ring body and clamped in the cylinder body. According to the utility model, the clamping connection of the reinforcing steel bar is realized through the end cover through hole smaller than the diameter of the enlarged head, and the gap between the enlarged head and the end plate is filled through the inner ring body, so that the reinforcing steel bar has good tensile and compression resistance effects.

Inventors

  • LI CANGZHU

Assignees

  • 李藏柱

Dates

Publication Date
20260508
Application Date
20231229

Claims (20)

  1. 1. A sleeve steel bar connecting structure is characterized by comprising a steel bar (1) to be connected and a sleeve (12), wherein an enlarged head (11) is arranged at the end of the steel bar (1), the sleeve (12) comprises a cylinder body (2) and an end cover (3) assembled at the end of the cylinder body (2) in a threaded mode, the end cover (3) comprises an outer ring body (31) and an end plate (32), a through hole (321) larger than the diameter of the steel bar (1) is formed in the middle of the end plate (32), the end plate (32) extends inwards and vertically at the through hole (321) to form an inner ring body (33), the inner ring body (33) stretches into the cylinder body (2) and has an inner diameter smaller than the diameter of the enlarged head (11), the steel bar (1) stretches into the cylinder body (2), and the enlarged head (11) is abutted and clamped in the cylinder body (2) by the inner ring body (33) after the end cover (3) is assembled.
  2. 2. The sleeve reinforcement connection structure according to claim 1, wherein the end cap (3) is of unitary construction.
  3. 3. The sleeve reinforcement connection structure according to claim 1, wherein the inner ring body (33) of the end cap (3) is screwed or inserted into the end plate (32).
  4. 4. The sleeve steel bar connecting structure according to claim 1, wherein the end cover (3) is axially split into two halves, namely a first end cover part (34) and a second end cover part (35), and the outer ring body (31) and the inner ring body (33) clamp the cylinder wall of the cylinder body (2).
  5. 5. The sleeve steel bar connecting structure according to claim 1, wherein the outer wall of the cylinder (2) and/or the inner wall of the cylinder (2) are in threaded connection with the end cover (3).
  6. 6. The sleeve steel bar connecting structure according to claim 1, wherein the inner wall of the cylinder body (2) is in threaded connection with the outer wall of the inner ring body (33), the outer wall of the cylinder body (2) is in conical surface fit with the inner wall of the outer ring body (31), and the diameter of the conical surface close to the end of the cylinder body (2) is small.
  7. 7. The sleeve steel bar connecting structure according to claim 1, wherein the outer wall of the cylinder body (2) is in threaded connection with the inner wall of the outer ring body (31), the inner wall of the cylinder body (2) is in conical surface fit with the outer wall of the inner ring body (33), and the diameter of the conical surface close to the end of the cylinder body (2) is large.
  8. 8. The sleeve steel bar connecting structure according to claim 1, wherein a plurality of sliding grooves (29) are formed in the threaded position of the cylinder body (2), the direction of the sliding grooves (29) is parallel to the axial direction of the cylinder body (2), matched convex sliding blocks (312) are arranged on the side wall of the inner ring body (33) and/or the outer ring body (31) of the end cover (3), and the sliding blocks (312) can slide along the sliding grooves (29) and are screwed into the threaded grooves (23).
  9. 9. The reinforcing steel bar connecting structure of sleeve according to claim 1, wherein the cylinder (2) is cut along the longitudinal direction to form two or more cylinder units (21) spliced with each other.
  10. 10. The sleeve steel bar connecting structure according to any one of claims 1-9, wherein end covers (3) are arranged at two ends of the sleeve (12) and have the same structure, and the end structures of two connected steel bars (1) are the same.
  11. 11. The sleeve steel bar connecting structure according to any one of claims 1 to 9, wherein one port of the sleeve (12) is a flat port (7), a steel bar (1) is provided with a hook (71), the sleeve (12) is provided with radial pin holes which are arranged in a penetrating manner, and the hook (71) stretches into the sleeve (12) to hook a pin (72) inserted from the pin holes, so that the connection between the steel bar (1) and the sleeve (12) is realized.
  12. 12. The sleeve steel bar connecting structure according to any one of claims 1 to 9, wherein one port of the sleeve (12) is a flat port (7), one steel bar (1) is provided with an enlarged head (11), the enlarged head (11) is a flat head (73), and the flat head (73) is inserted into the cylinder (2) through the flat port (7) and is clamped with the cylinder (2) after rotating.
  13. 13. The sleeve steel bar connecting structure according to any one of claims 1-9, wherein a plurality of clamping holes (76) are formed in the circumferential direction of the cylinder wall at one end opening of the cylinder body (2), clamping blocks (77) are arranged in the clamping holes (76), two ends of each clamping block (77) are respectively positioned on the inner side and the outer side of the cylinder body (2), one end positioned on the outer side of the cylinder body (2) is connected with an elastic piece (78), the elastic piece (78) is fixedly arranged on the cylinder body (2), an expanding head (11) is arranged at one end, extending into the cylinder body (2), of the steel bar (1), and the expanding head (11) can be clamped in the cylinder body (2) through the clamping blocks (77).
  14. 14. The sleeve steel bar connecting structure according to any one of claims 1-9 is characterized in that a plurality of elastic slips (75) are uniformly distributed on the circumference of the inner side wall of the cylinder (2) close to a port, the elastic slips (75) are obliquely arranged on the inner side wall of the cylinder (2), small round openings formed by the plurality of annular slips are close to the center of the cylinder (2), large round openings are far away from the center of the cylinder (2), an expanding head (11) is arranged at one end extending into the cylinder (2), and the expanding head (11) can be clamped in the cylinder (2) by the elastic slips (75).
  15. 15. The sleeve steel bar connecting structure according to any one of claims 1-9, wherein one end opening of the cylinder (2) is a conical closing opening, a slurry inlet hole (79) for cement slurry to enter is formed in the cylinder (2), one end of the steel bar (1) extending into the cylinder (2) is expanded outwards to form a truncated cone-shaped expansion head (11), and the expansion head (11) is fixed through concrete poured into the sleeve (12).
  16. 16. The reinforcing bar coupling structure of sleeve according to any one of claims 1 to 9, characterized in that a port of the sleeve (12) is screwed or cold-pressed with the reinforcing bar (1).
  17. 17. A sleeve, characterized in that: a sleeve as claimed in any one of claims 1 to 16.
  18. 18. A steel bar is characterized by comprising a steel bar (1), wherein an enlarged head (11) is formed at the end part of the steel bar (1), the steel bar further comprises an end cover (3) sleeved on the steel bar (1), the end cover (3) comprises an outer ring body (31) and an end plate (32), a through hole (321) larger than the diameter of the steel bar (1) is formed in the middle of the end plate (32), the end plate (32) extends inwards and vertically at the through hole (321) to form an inner ring body (33), and the inner ring body (33) can extend into a cylinder body (2) of a sleeve (12) and has an inner diameter smaller than the diameter of the enlarged head (11).
  19. 19. A concrete prefabricated part characterized by comprising a plurality of groups of steel bars (1) as claimed in claim 18, wherein the steel bars (1) are embedded in the concrete prefabricated part, the end parts of the steel bars (1) with the enlarged heads (11) extend out of the end faces of the prefabricated part, end covers (3) are positioned between the end faces of the prefabricated part and the enlarged heads (11), and the end parts of the end covers (3) with the end plates (32) are close to the end faces.
  20. 20. An assembly body is characterized by comprising a plurality of groups of sleeve steel bar connecting structures as claimed in any one of claims 1-15, and further comprising two prefabricated parts (9), wherein corresponding connecting steel bars (1) are pre-embedded at the connecting ends of the two prefabricated parts (9), the connecting steel bars (1) extend out of the connecting end faces of the prefabricated parts (9) and are provided with enlarged heads (11), and the sleeves (12) connect the corresponding two steel bars (1).

Description

Sleeve, connecting structure, reinforcing steel bar, prefabricated component and assembly Technical Field The utility model relates to the field of assembled buildings, in particular to a sleeve, a connecting structure, a reinforcing steel bar, a prefabricated part and an assembly body. Background At present, the connecting method of prefabricated components in an assembled concrete structure building, in particular to the connecting mode of vertical steel bars of vertical components (prefabricated wall boards/columns), which mainly comprises three connecting modes of 1) embedded part welding connection, 2) embedded part bolt connection and 3) steel bar sleeve grouting connection. The embedded part welded connection is that the connecting steel plates are preset at the connecting parts of the components, and after the prefabricated components are installed, the adjacent embedded steel plates among the components are welded and connected into a whole. The method has the advantages of simple installation and operation, and the defects of poor toughness, easy cracking, low connection strength, poor structural connection integrity, poor air tightness, poor shock resistance and poor corrosion resistance and durability of the steel plates caused by brittle change of the performance of the connecting steel plates due to welding process reasons, thus the method belongs to the obsolete technology and has a small market application range. The embedded part bolt connection method is to reserve a bolt hole in the embedded steel plate, reserve a mounting bolt at the mounting position, and insert the reserved bolt into the bolt hole of the embedded steel plate of the preset member to be fastened by a nut when the preset member is mounted. The advantages are high connection strength, low cost, poor structural connection integrity, air tightness, shock resistance, corrosion resistance and durability, and small market application range. The grouting sleeve comprises a sleeve with two open ends, and a slurry inlet and a slurry outlet which are arranged on the side wall of the sleeve. One section of the sleeve is pre-buried in the prefabricated part, the sleeve slurry inlet and slurry outlet are reserved at the outer side of the upper part, and pre-buried ribs of the prefabricated part are inserted into the sleeve. After the components are installed and positioned, the joints of the two prefabricated components are filled, grouting material is injected from the grout inlet holes, so that the reinforcing steel bars are combined with the sleeve to play a role in connection. The steel bar sealing sleeve has the advantages that the steel bar is in a sealing environment through grouting after being inserted into the sleeve, so that the problems of corrosion resistance and durability are solved, and the connection strength is superior to the two modes of welding and bolting. The steel bar sleeve grouting connection technology has the following problems that 1, construction operation is difficult to influence due to the fact that steel bars are deformed, displaced, installation gaps are small and the like, 2, grouting leakage is easy to occur and cannot be detected, 3, the operation process is complex and requires special equipment, tools, materials and personnel, 4, the cost is high, the quality is difficult to control, 4, the factors affecting grouting quality are large (materials, water-cement ratio, stirring, grouting leakage, personnel operation, application time and the like), and the quality control difficulty is high, 5, because the steel bar sleeve grouting connection technology is used for bonding steel bars and sleeves through grouting, and steel bars are connected through friction force principle and effect. Therefore, grouting material is used as a connecting medium to play a decisive role in connection quality, grouting is full, no slurry leakage and no shrinkage are needed, but in the practical application process, particularly, connection quality of vertical members (easy slurry leakage and incapability of quality inspection) is difficult to ensure, quality controllability is poor, the connection quality directly influences the connection strength of reinforcing steel bars, invalid connection (reinforcing steel bar core pulling phenomenon) is formed, and potential safety hazards of buildings are caused. Disclosure of utility model A first object of the present utility model is to provide a reinforcing bar coupling sleeve and a coupling structure thereof, which have advantages of improving coupling strength between reinforcing bars and the sleeve and being convenient to install. The sleeve steel bar connecting structure comprises a steel bar to be connected and a sleeve, wherein an expanding head is arranged at the end head of the steel bar, the sleeve comprises a cylinder body and an end cover assembled on the end head of the cylinder body through threads, the end cover comprises an outer ring body and an end plate,