Connecting device for finish-rolled twisted steel bar and prestressed steel bar
By designing a connection device suitable for fine-rolled threaded steel bars and prestressed steel bars of different diameters, the problems of high processing costs and low turnover efficiency in traditional connection methods are solved, and a low-cost, fast and stable connection effect is achieved. It is suitable for steel bars of multiple diameters.
Patent Information
- Application Number
- CN202421747929.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The traditional method of connecting the threaded steel bars and prestressed steel bars requires customized variable cross-sectional connection devices when the diameters are inconsistent, resulting in high processing costs, long time consumption and low turnover efficiency.
It adopts a structure of two connectors, two sleeves and two sleeves. The connector consists of several connecting rods and semicircular steel pipes. The sleeve is fixed on the end of the steel bar, and the sleeve is tightened on the outer circle of the semicircular steel pipe, which is suitable for connecting steel bars of different diameters.
It realizes low-cost and fast connection, and is suitable for steel bars of different diameters. The connection is stable and reliable, which improves construction efficiency and versatility and reduces material waste.
Smart Images
Figure CN223088761U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a connecting device for road and bridge construction, in particular to a connecting device for tensioning prestressed steel bars by the pre-tensioning method in road and bridge construction, belonging to the technical field of road and bridge construction accessories. Background Technique
[0002] In engineering construction, such as in the prefabrication construction of crossbeams, track beams and hollow slabs, precast reinforced concrete components are usually used. To improve the tensile strength, durability and overall life of the concrete therein, the prestressing method is generally required. The prestressing method is divided into the pre-tensioning method and the post-tensioning method. Among them, the pre-tensioning method requires applying prestress to the steel bars before pouring concrete. After the concrete reaches a certain strength, the tension on the steel bars is released, so that the contraction force of the steel bars acts on the concrete to achieve the effect of improving the tensile strength of the concrete.
[0003] When prestressing steel bars are tensioned, generally high-strength threaded steel bars are used to replace part of the prestressed steel bars for tensioning, which can not only reduce a large amount of waste of steel bar cutting, but also avoid fatigue failure of the steel bars after repeated tensioning. The traditional connection method of high-strength threaded steel bars and prestressed steel bars is to thread the connection ends of the prestressed steel bars and high-strength threaded steel bars respectively, and screw the two together with a sleeve. This connection method requires that the diameters of the prestressed steel bars and high-strength threaded steel bars are the same. If the diameters of the two are inconsistent at the construction site, a variable cross-section connecting device needs to be customized by contacting a professional manufacturer. The processing cost of the variable cross-section connecting device is high, the time consumption is long, and the turnover efficiency is low. Content of the Utility Model
[0004] The purpose of the utility model is to provide a connecting device for high-strength threaded steel bars and prestressed steel bars with simple structure, low cost, flexible turnover and strong versatility.
[0005] The utility model is realized through the following technical solutions:
[0006] A connecting device for high-strength threaded steel bars and prestressed steel bars comprises two connectors, two sleeves and two collars; the two connectors are symmetrically located on the upper and lower sides of the high-strength threaded steel bars and prestressed steel bars. Each connector comprises several connecting rods and two semi-circular steel pipes. The several connecting rods are arranged in parallel, and the two ends of the several connecting rods are fixedly connected to the outer circles of the two semi-circular steel pipes respectively; the two sleeves are respectively fixedly sleeved on the ends of the high-strength threaded steel bars and prestressed steel bars. The semi-circular steel pipes at both ends of the connector respectively embrace the high-strength threaded steel bars and prestressed steel bars. The two collars are respectively sleeved on the outer circles of the corresponding two semi-circular steel pipes, and the end faces of one ends of the two sleeves respectively abut against the end faces of the semi-circular steel pipes after embracing.
[0007] The purpose of the utility model can also be further realized by the following technical measures.
[0008] The aforementioned connecting device for the finish-rolled threaded steel bar and the prestressed steel bar, wherein the inner diameters of the semicircular steel pipes are respectively larger than the outer diameters of the finish-rolled threaded steel bar and the prestressed steel bar.
[0009] The aforementioned connecting device for the finish-rolled threaded steel bar and the prestressed steel bar, wherein the inner diameters of the semicircular steel pipes respectively match the outer diameters of the finish-rolled threaded steel bar and the prestressed steel bar.
[0010] The aforementioned connecting device for the finish-rolled threaded steel bar and the prestressed steel bar, wherein the several connecting rods are made of steel bars.
[0011] The aforementioned connecting device for the finish-rolled threaded steel bar and the prestressed steel bar, wherein the ferrule is made of seamless steel pipe.
[0012] The structure of the present utility model is simple and compact, with low cost, convenient disassembly and assembly. The connection between the finish-rolled threaded steel bar and the prestressed steel bar is firm and reliable, with good stress conditions, which can ensure the integrity of the connection part during the tensioning process of the prestressed steel bar. At the same time, it is applicable to the connection of prestressed steel bars and finish-rolled threaded steel bars with various different diameters, with strong versatility, wide application range and flexible turnover. In addition, the present utility model can use local materials, fully utilize the on-site materials for production, with simple production and short required time, which can effectively speed up the progress and shorten the construction period.
[0013] The advantages and characteristics of the present utility model will be illustrated and explained through the non-restrictive description of the following preferred embodiments, which are given only as examples with reference to the attached drawings. Description of the Drawings
[0014] Figure 1 is the structural schematic diagram of the present utility model.
[0015] Figure 2 is Figure 1 the left view of Detailed Embodiments
[0016] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0017] As Figure 1 and Figure 2As shown in the figure, the utility model includes two connectors 1, two sleeves 2 and two collars 3. The two connectors 1 are symmetrically located on the upper and lower sides of the precision rolled threaded steel bar 4 and the prestressed steel bar 5. Each connector 1 includes two connecting rods 11 and two semi-circular steel pipes 12. The two connecting rods 11 are both made of steel bars and are arranged in parallel. The two ends of the two connecting rods 11 are respectively welded to the outer circles of the two semi-circular steel pipes 12. The inner diameter of the semi-circular steel pipe 12 can be larger than the outer diameters of the precision rolled threaded steel bar 4 and the prestressed steel bar 5, or can match the outer diameters of the precision rolled threaded steel bar 4 and the prestressed steel bar 5. The two sleeves 3 are respectively fixed to the ends of the precision rolled threaded steel bar 4 and the prestressed steel bar 5 by screwing. The semi-circular steel pipes 12 at both ends of the connector 1 respectively embrace the precision rolled threaded steel bar 4 and the prestressed steel bar 5. The two collars 3 are respectively sleeved on the outer circles of the corresponding two semi-circular steel pipes 12, so as to fasten the corresponding two semi-circular steel pipes 12. The end faces of one end of the two sleeves 2 respectively abut against the end faces of the semi-circular steel pipes 12 after embracing, which is convenient for applying tensile force to the prestressed steel bar 5 and axially positioning the connector 1 at the same time. The semi-circular steel pipes 12 and the collars 3 are both made of seamless steel pipes.
[0018] According to Figure 1 As shown in the figure, after the assembly is completed, the prestressed steel bar 5 can be tensioned. After the concrete is poured and the tensioning is completed, first unscrew and remove the sleeve on the prestressed steel bar 5, then cut off the redundant prestressed steel bar 5, and then tension the next batch of prestressed steel bars.
[0019] In addition to the above embodiments, the utility model can also have other implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the utility model.
Claims
1. A connecting device for fine-rolled threaded steel bars and prestressed steel bars, characterized in that: It includes two connectors, two sleeves and two collars; the two connectors are symmetrically located on the upper and lower sides of the precision rolled threaded steel bar and the prestressed steel bar. Each connector includes several connecting rods and two semi-circular steel pipes. The several connecting rods are arranged in parallel, and the two ends of the several connecting rods are fixedly connected to the outer circles of the two semi-circular steel pipes respectively; the two sleeves are respectively fixedly sleeved on the ends of the precision rolled threaded steel bar and the prestressed steel bar. The semi-circular steel pipes at both ends of the connector respectively embrace the precision rolled threaded steel bar and the prestressed steel bar. The two collars are respectively sleeved tightly on the outer circles of the corresponding two semi-circular steel pipes, and the end faces of one ends of the two sleeves respectively abut against the end faces of the semi-circular steel pipes after embracing.
2. The connecting device for the finish-rolled ribbed steel bar and the prestressed steel bar according to claim 1, characterized in that: The inner diameters of the semi-circular steel pipes are respectively larger than the outer diameters of the precision rolled threaded steel bar and the prestressed steel bar.
3. The connecting device for finish-rolled ribbed steel bars and prestressed steel bars according to claim 1, characterized in that: The inner diameters of the semi-circular steel pipes respectively match the outer diameters of the precision rolled threaded steel bar and the prestressed steel bar.
4. The connecting device for fine rolled threaded steel bars and prestressed steel bars according to claim 1, wherein: The several connecting rods are made of steel bars.
5. The connecting device for the finish-rolled threaded steel bar and the prestressed steel bar according to claim 1, characterized in that: The collars are made of seamless steel pipes.