RU198093U1 - Coupling for connecting reinforcing bars - Google Patents

Abstract

The utility model relates to the field of construction and is intended for connecting reinforcing rods with couplings in length. The technical result of the utility model is to improve the accuracy and quality of the coupling of the reinforcement with minimal labor. The problem is solved due to the fact that the internal through cylindrical cavity of the coupling is made conical extensions (sockets) at the end sections and with multiple threads on the surface.

Description

The utility model relates to the field of construction and is intended to connect reinforcing bars with couplings in length.

When joining nets and frames, consisting of reinforcement rods, with each other by couplings, it is necessary to observe the alignment of the joined pairs of rods.

In the process of manufacturing reinforcing work at a construction site, this condition is difficult to fulfill, even when using reinforcing products welded on automatic equipment.

To solve this issue, conductors and clamps are used at the construction site and reinforcing workshops (Utility model VP 180555 U1 / Element for connecting reinforcing bars / Fomin N.I., Bernhard K.V., Zoteev E.E. No. 2017129634; declared. 21.08 .2017, publ. 06/18/2018 Bull. No. 17. Copyright certificate No. 559805 Cl. V23K 37/04 / Device for assembling reinforcing cages / B.R. .77, Bull. No. 20).

Known structural solutions with careful monitoring of their implementation can ensure alignment of the joined rods with deviations of 1-5 mm.

For effective connection with existing screw fittings with one-way thread, these deviations may be too small, which leads to significant labor costs to fix the joint defect.

In addition, with a single-thread design of the threads of the couplings and the joined rods, they need to be rotated by 0-360 ° relative to each other to match the thread runs, which is difficult when joining the rods fixed in grids and frames especially welded.

Multiple threads significantly facilitate a positive solution to this problem at times equal to the number of threads.

The objective of the utility model is to develop a constructive solution for couplings for connecting reinforcement, which provides the possibility of joining rods with alignment deviations of up to 5–8 mm with minimal labor and high quality of this connection.

This problem is solved due to the fact that the internal through cylindrical cavity of the coupling is made with cone-shaped extensions (sockets) at the end sections and with multi-thread on the surface.

1 and 2 show the construction of a screw coupling for connecting reinforcing bars: FIG. 1 is a longitudinal section through the coupling and the connected reinforcing bars; FIG. 2 - section 1-1.

The coupling design consists of a coupling body, with an internal cylindrical cavity, performed by machining a workpiece from round, hexagonal and other types of rolled products - 1, at the ends of the internal cylindrical cavity there are cone-shaped extensions (sockets) - 2, a multi-thread is formed on the surface of the cylindrical cavity of the coupling - 3, similar to that performed when rolling the rods or applied to the surface of their end sections in addition - 4.

Installation connected by welding fixed reinforcing rods of grids and frames using the proposed couplings as follows.

Initially, couplings are completely screwed onto the ends of the rods of one of the mats or frames to be joined.

Then the ends of the rods of the second grid or frame are brought in with coaxial contact joining of the joined rods. Due to the cone-shaped expansion at the ends of the cylindrical cavity of the couplings, the limit tolerances of the alignment of the rods will be increased to the values Δ shown in FIG. 1. The values of Δ exceed 1/2 of the wall thickness of the coupling and the tolerances of the location of the rods in the grids or frames provided by welding.

This will greatly simplify and improve the quality of the joints made by twisting the couplings from the ends of the limitedly movable rods of one abutting element (mesh, frame) to the ends of the other.

The presence of multi-thread on the rods and in the coupling also provides increased strength, reliability, quality and speed of the coupling connection.

For example, a two-start thread relative to a single-thread increases the speed of winding up the coupling and the likelihood of its thread entering the thread of the mating rod is doubled, three-way - three, four-way - four, etc.

In addition, the presence of cone-shaped extensions at the ends of the cylindrical through hole in the coupling facilitates the penetration into its cement-sand component of the concrete mixture, which, after hardening, provides a monolithic, durable and low deformable joint under load, which is also a technical result of the proposed design solution of the coupling.

Claims (1)

A coupling for connecting reinforcing bars of meshes or frames made with an internal through cylindrical cavity, characterized in that it is made with cone-shaped extensions at the end sections of the internal cylindrical cavity, on the surface of which a multi-thread is formed, similar to the threads of the rods.

Images