CN-122013936-A - Mortise and tenon structural type steel bar mechanical connecting joint

Abstract

The invention discloses a mortise-tenon structural type steel bar mechanical connecting joint, which belongs to the technical field of steel bar connection and comprises an outer sleeve and a connecting locking assembly arranged in the outer sleeve, wherein the connecting locking assembly comprises mortise-tenon type clamping pieces and connecting clamping pieces which are arranged in a split mode, the mortise-tenon type clamping pieces are directly enmeshed on the surface of a steel bar, the connecting clamping pieces are arranged between the mortise-tenon type clamping pieces and the inner wall of the outer sleeve, the steel bar does not need to rotate or axially move, the mortise-tenon type clamping pieces and the surface of the steel bar are forced to form mechanical engagement through the radial constraint action of the outer sleeve, so that the axial force transmission of the two steel bars is realized.

Inventors

• CHEN ZHENFU
• YANG ZIYUE
• WU SHA

Assignees

• 江苏星河阀门有限公司

Dates

Publication Date

20260512

Application Date

20260311

Claims (9)

1. 1. A mortise and tenon structural type steel bar mechanical connecting joint is used for connecting two axially opposite steel bars and is characterized by comprising an outer sleeve and a connecting and locking assembly; the outer sleeve is provided with an axial through hole for the steel bar to pass through; the connecting locking component is arranged in the axial through hole of the outer sleeve; The connecting locking assembly is configured to form mechanical engagement with the surfaces of two reinforcing steel bars through the radial constraint action of mortise-tenon fit and the outer sleeve, so that the axial force transmission of the two reinforcing steel bars is realized.
2. 2. The mortise and tenon type mechanical steel bar connecting joint according to claim 1, characterized in that the connecting and locking assembly comprises a mortise and tenon type clamping piece and a connecting clamping piece which are arranged in a split manner; The mortise and tenon type clamping piece is directly bonded to the surface of the steel bar, and the connecting clamping piece is arranged between the mortise and tenon type clamping piece and the inner wall of the outer sleeve.
3. 3. The mechanical connecting joint for mortise and tenon joint type steel bars according to claim 2, wherein the mortise and tenon joint type clamping pieces are at least two pieces, are spliced along the circumferential direction of the steel bars, and are provided with grooves or tooth-shaped structures meshed with ribs on the surfaces of the steel bars on the inner surfaces.
4. 4. The mechanical connection joint for mortise and tenon joint type steel bars according to claim 3, wherein the connection clamping piece is of an annular structure, and the contour of the inner wall of the connection clamping piece is matched with the contour of the mortise and tenon joint type clamping piece.
5. 5. The mortise and tenon type steel bar mechanical connecting joint according to claim 2, wherein conical surface fit, threaded fit or interference fit is formed between the inner wall of the outer sleeve and the outer wall of the connecting clamping piece.
6. 6. The mortise and tenon type steel bar mechanical connecting joint according to claim 5 wherein an inner conical surface is provided on an inner wall of the outer sleeve, and an outer conical surface matched with the outer conical surface is provided on an outer wall of the connecting clip.
7. 7. The mechanical mortise and tenon joint type reinforcing bar coupler according to any one of claims 2 to 6, wherein the mortise and tenon type clamping pieces in the coupler locking assembly are two groups, which correspond to the ends of two reinforcing bars to be coupled respectively.
8. 8. The mechanical connecting joint for mortise and tenon joint structured steel bars according to claim 7, characterized in that the connecting clamping pieces in the connecting and locking assembly are of an annular and combined double-taper sleeve structure after combination, or of an integrally formed double-taper sleeve structure, or of an independent annular piece.
9. 9. The mortise and tenon type steel bar mechanical connecting joint according to claim 1, wherein limiting structures are arranged on inner walls of two ends of the outer sleeve or the connecting locking assembly.

Description

Mortise and tenon structural type steel bar mechanical connecting joint Technical Field The invention belongs to the technical field of steel bar connection, and particularly relates to a steel bar mechanical connection joint. Background The reinforcing steel bars are used as core stress materials in modern concrete structures, and the connection reliability directly influences the bearing capacity, the anti-seismic performance and the service life of the whole structure. In various civil engineering such as house construction, bridge engineering, water conservancy facilities, subway tunnels and the like, a large number of reinforcing steel bars which need to be connected in the field or factory exist, so that development of a reinforcing steel bar connection technology with high efficiency, reliability and convenience in construction is always the key point of industrial research and development. The mechanical steel bar connecting joint is a key component for realizing steel bar connection and is mainly divided into a threaded sleeve and an extrusion sleeve at present, but the threaded sleeve and the extrusion sleeve have certain limitations in practical application: The screw sleeve connection needs to cut part of the longitudinal rib and the transverse rib at the end of the steel bar by a thread rolling machine and then roll threads, the process can reduce the effective sectional area of the steel bar, form weak links which can influence the mechanical property of a joint area, and meanwhile, the process has higher requirement on the processing precision of the steel bar and is not suitable for the steel bars with all specifications or materials. The sleeve is connected with the steel bar without weakening the section of the steel bar, but the sleeve is forced to be radially extruded by large-tonnage special extrusion equipment to generate plastic deformation and be meshed with the steel bar, the process equipment is heavy, the requirements on the operation space and the skills of personnel are high, the construction efficiency is low, in addition, the extruded sleeve and the steel bar are not detachable, and the common spacing or axial deviation of the steel bar in construction is difficult to adjust. In summary, the existing mainstream steel bar mechanical connection technology generally has the following problems that the section of the steel bar is required to be cut and damaged, or large equipment is needed, the process is complex, or the adaptability and adjustability are insufficient, especially under the background of rapid development of an assembled building, the requirements on site construction convenience and connection quality stability are increasingly improved, so that the development of a novel steel bar mechanical connection joint which does not need to process a steel bar body, does not damage the section of the steel bar, is flexible, simple and convenient to construct and reliable to connect is a technical problem to be solved in the art. Disclosure of Invention Aiming at the problems that the prior threaded sleeve needs to cut a reinforcing steel bar to weaken the section, the extrusion sleeve depends on large equipment, the construction is inconvenient and the adaptability is poor, and the like, the invention provides a mortise and tenon structural type reinforcing steel bar mechanical connecting joint, which aims at realizing the reinforcing steel bar mechanical connection which does not damage a reinforcing steel bar body, does not need complex processing, is suitable for a reinforcing steel bar fixing scene, and is simple and convenient to construct and reliable in connection. In order to achieve the above purpose, the invention adopts the following technical scheme: a mortise and tenon structural type steel bar mechanical connecting joint is used for connecting two axially opposite steel bars and comprises two outer sleeves and at least one group of connecting and locking assemblies. The outer sleeve is provided with an axial through hole for the steel bar to pass through, and the connecting and locking assembly is arranged in the axial through hole of the outer sleeve. When the end parts of the two reinforcing bars are in place, the radial constraint action of the outer sleeve on the connecting and locking assembly is utilized to enable the connecting and locking assembly to form mechanical engagement with the surfaces of the two reinforcing bars, so that the axial force transmission between the reinforcing bars is realized. Specifically, connect locking subassembly includes mortise type clamping piece and the connection clamping piece that the components of a whole that can function independently set up, and wherein, mortise type clamping piece is used for directly embracing in the reinforcing bar surface, and the connection clamping piece then sets up between the inner wall of mortise type clamping piece and outer sleeve. Further, the mortise and tenon type clamping pieces