Reinforcing steel bar mechanical connecting and welding composite integrated connecting device and using method

Abstract

The invention discloses a reinforcing steel bar mechanical connecting and welding composite integrated connecting device and a using method, and belongs to the technical field of building construction. The device comprises a sleeve with internal threads, matched external threads and radial pin holes are formed in the ends of the steel bars, positioning holes are formed in the two ends of the sleeve, and a welding notch is formed in the outer wall of the middle section. Two steel bars are screwed into the two ends of the sleeve to be in threaded connection, penetrate through the positioning holes through the positioning pins to be fixed with the pin holes and then are welded through the welding notches. The use method comprises the five steps of steel bar pretreatment, sleeve installation, positioning pin installation, other steel bar installation and welding fixation. Through the dual effects of mechanical occlusion and welding, the tensile strength of the joint is improved, and the requirement of a high-stress scene is met; the external threads of the steel bars are damaged through welding, the threads are prevented from loosening, the welding quality requirement and the construction difficulty are reduced, and the problems that an existing steel bar connecting technology is weak in tensile strength, prone to loosening and complex in construction are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a steel bar mechanical connection welding composite integrated connection device and a use method thereof. Background Art

[0002] Under the background of the continuous development of the construction industry, the scale of construction is constantly expanding, and the requirements for the stability of building structures are becoming increasingly stringent. As a key component of concrete structure, the quality of steel bar connection is directly related to the safety and durability of the entire building.

[0003] At present, the main methods of connecting steel bars in construction are sleeve connection and traditional welding. Sleeve connection relies on mechanical bite to achieve steel bar connection. However, the tensile strength of this method is greatly restricted by the material friction coefficient. In high-stress scenarios such as buildings in earthquake zones and large-span bridges, joints are prone to loosening, causing connection failure and making it difficult to fully ensure structural safety. Although traditional welding methods can ensure connection strength to a certain extent, the operation process is complicated and requires professional welders to rely on rich experience and superb skills to complete, and the construction efficiency is extremely low. It can be seen that the existing steel bar connection technology has obvious shortcomings, and a new connection device and method are urgently needed to improve the current difficulties faced by steel bar connections. Summary of the invention

[0004] The present invention aims to solve the above-mentioned problem, thereby providing a steel bar mechanical connection welding composite integrated connection device and a use method.

[0005] The present invention solves the above-mentioned problem by adopting the following technical solution: A steel bar mechanical connection welding composite integrated connection device comprises a sleeve, wherein an internal thread is provided in the sleeve, an external thread matching the internal thread of the sleeve is provided at the end of the steel bar, two steel bars to be connected are respectively located at the two ends of the sleeve and are threadedly connected to the sleeve, a plurality of long strip welding grooves connected to the interior of the sleeve are provided on the outer wall of the middle section of the sleeve, and the end of the steel bar screwed into the sleeve is fixed by welding to the sleeve through the welding groove.

[0006] The ends of the steel bars are provided with radial pin holes, and the two ends of the sleeve are provided with multiple pairs of radial positioning holes penetrating the sleeve wall. Positioning pins are provided in the positioning holes, and the positioning pins pass through the positioning holes, the steel bar pin holes and the positioning holes on the other side of the sleeve in sequence from one side of the sleeve; the connection strength and stability between the steel bars and the sleeve are further enhanced. The setting of the positioning pins makes the connection between the steel bars and the sleeve more secure, and can better resist external forces under high stress, avoiding loosening and failure of the joint.

[0007] The welding notches are symmetrically distributed on the circumferential outer wall of the sleeve, and at least one pair is provided; the symmetrically distributed welding notches can make the welding more uniform.

[0008] A method for using a combined integrated connection device for mechanical connection and welding of steel bars is carried out according to the following steps: Step 1: Pretreatment of steel bars. The ends of the two steel bars to be connected are processed so that the ends of the steel bars form external threads adapted to the internal threads in the sleeve, and radial pin holes are opened at the ends of the steel bars. Step 2: Sleeve installation. Rotate the sleeve onto one of the steel bars until the positioning holes on the sleeve are aligned with the pin holes on the steel bar. Step 3: Installation of positioning pins. Insert the positioning pins into the aligned sleeve positioning holes and steel bar pin holes, so that the positioning pins sequentially penetrate the positioning holes, the steel bar pin holes and the positioning holes on the other side of the sleeve from one side of the sleeve, thereby fixing the sleeve to the steel bar. Step 4: Installation of the other steel bar. Rotate and insert the other pre-treated steel bar from the other end of the sleeve, and repeat Step 2 and Step 3 to align the two steel bars in the sleeve. Step 5: Welding and fixing. Through the welding notch on the outer wall of the middle section of the sleeve, weld and fix the end of the steel bar to the sleeve.

[0009] The present invention adopting the above technical solution, compared with the prior art, its prominent features are: Through the dual actions of mechanical bite by threads plus positioning pins and welding, the present invention enables the joint to form a metallurgical bond, significantly improving the tensile strength of the joint and meeting the use requirements under high-stress scenarios; through the welding notch on the outer wall of the middle section of the sleeve, the end of the steel bar can be welded and fixed to the sleeve. During the welding process, the end of the steel bar undergoes thermal deformation and the external thread structure is damaged, which can effectively prevent thread loosening between the steel bar and the sleeve, and there is no need for too high requirements for the welding quality, reducing the construction difficulty. Description of the Drawings

[0010] Figure 1 It is a schematic diagram of the main structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the usage state structure of an embodiment of the present invention; The markings in the figure are: sleeve 1, steel bar 2, internal thread 11, positioning hole 12, welding notch 13, positioning pin 14, external thread 21. Detailed Embodiments

[0011] The present invention will be further described below in conjunction with embodiments, and the purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0012] See Figure 1 - Figure 2, a combined integrated connection device for mechanical connection and welding of steel bars, including a sleeve 1. An internal thread 11 is provided inside the sleeve 1. External threads 21 adapted to the internal thread 11 inside the sleeve 1 are provided at the ends of the steel bars 2. The two steel bars 2 to be connected are respectively located at both ends of the sleeve 1 and are threadedly connected to the sleeve 1. A plurality of long strip-shaped welding slots 13 communicating with the inside of the sleeve 1 are provided on the outer wall of the middle section of the sleeve 1. The ends of the steel bars 2 screwed into the sleeve 1 are welded and fixed to the sleeve 1 through the welding slots 13.

[0013] Radial pin holes are provided at the ends of the steel bars 2. A plurality of pairs of radial positioning holes 12 penetrating the sleeve wall are respectively provided on the circumferences of both ends of the sleeve 1. A positioning pin 14 is arranged in the positioning holes 12. The positioning pin 14 sequentially penetrates the positioning holes 12, the steel bar pin holes and the positioning holes 12 on the other side of the sleeve 1 from one side of the sleeve 1; this further enhances the connection strength and stability between the steel bar 2 and the sleeve 1. The setting of the positioning pin 14 makes the connection between the steel bar 2 and the sleeve 1 more firm. Under high stress, it can better resist external forces and avoid joint loosening and failure.

[0014] The welding slots 13 are symmetrically distributed on the circumferential outer wall of the sleeve 1 and at least one pair is provided; the symmetrically distributed welding slots 13 can make the welding more uniform.

[0015] A method for using a combined integrated connection device for mechanical connection and welding of steel bars is carried out according to the following steps: Step 1: Pretreatment of steel bars. The ends of the two steel bars 2 to be connected are processed so that external threads 21 adapted to the internal thread 11 inside the sleeve 1 are formed at the ends of the steel bars 2, and radial pin holes are provided at the ends of the steel bars 2. Step 2: Sleeve installation. Rotate the sleeve 1 and put it on one of the steel bars 2 until the positioning holes 12 on the sleeve 1 are aligned with the pin holes on the steel bar 2. Step 3: Positioning pin installation. Insert the positioning pin 14 into the aligned sleeve positioning holes 12 and steel bar pin holes, so that the positioning pin 14 sequentially penetrates the positioning holes 12, the steel bar pin holes and the positioning holes 12 on the other side of the sleeve 1 from one side of the sleeve 1, thereby fixing the sleeve 1 to the steel bar 2. Step 4: Installation of the other steel bar. Rotate and insert the other pretreated steel bar 2 from the other end of the sleeve 1, and repeat Step 2 and Step 3 to make the two steel bars 2 centered inside the sleeve 1. Step 5: Welding and fixing. Through the welding slots 13 on the outer wall of the middle section of the sleeve 1, the ends of the steel bars 2 are welded and fixed to the sleeve 1.

[0016] Through the dual actions of mechanical bite of threads and positioning pins and welding, the invention enables the joint to form a metallurgical bond, significantly improving the tensile strength of the joint and meeting the usage requirements under high-stress scenarios. Through the welding notch on the outer wall of the middle section of the sleeve, the end of the steel bar can be welded and fixed to the sleeve. During the welding process, the end of the steel bar undergoes thermal deformation and the external thread structure is damaged, effectively preventing thread loosening between the steel bar and the sleeve, and there is no need for overly high requirements for welding quality, reducing the construction difficulty.

[0017] The above are only the preferred and feasible embodiments of the present invention, and thus do not limit the scope of the rights of the present invention. Any equivalent changes made by using the content of the specification and drawings of the present invention are included within the scope of the rights of the present invention.

Claims

1. A steel bar mechanical connection welding composite integrated connection device, comprising a sleeve, characterized in that: The sleeve is provided with an internal thread, and the end of the steel bar is provided with an external thread that matches the internal thread of the sleeve. Two steel bars to be connected are respectively located at both ends of the sleeve and are threadedly connected to the sleeve. The outer wall of the middle section of the sleeve is provided with a plurality of long strip welding grooves that are connected to the interior of the sleeve. The end of the steel bar screwed into the sleeve is welded and fixed to the sleeve by the welding groove.

2. The steel bar mechanical connection welding composite integrated connection device according to claim 1 is characterized in that: A radial pin hole is opened at the end of the steel bar, and multiple pairs of radial positioning holes penetrating the sleeve wall are respectively provided on both ends of the sleeve. Positioning pins are arranged in the positioning holes, and the positioning pins pass through the positioning hole, the steel bar pin hole and the positioning hole on the other side of the sleeve in sequence from one side of the sleeve.

3. The steel bar mechanical connection welding composite integrated connection device according to claim 1, characterized in that: The welding notches are symmetrically distributed on the circumferential outer wall of the sleeve, and at least one pair is provided.

4. A method for using the steel bar mechanical connection welding composite integrated connection device according to any one of claims 1 to 3, characterized in that: Follow these steps: Step 1: Pre-process the steel bars, process the ends of the two steel bars to be connected, form external threads on the ends of the steel bars that match the internal threads of the sleeve, and open radial pin holes on the ends of the steel bars; Step 2: Install the sleeve, rotate the sleeve into one of the steel bars until the positioning hole on the sleeve is aligned with the pin hole on the steel bar; Step 3: Install the positioning pin, insert the positioning pin into the aligned sleeve positioning hole and the steel bar pin hole, so that the positioning pin passes through the positioning hole, the steel bar pin hole and the positioning hole on the other side of the sleeve from one side of the sleeve in sequence, thereby fixing the sleeve to the steel bar; Step 4: Install another steel bar. Rotate and insert another pre-treated steel bar from the other end of the sleeve. Repeat steps 2 and 3 to center the two steel bars in the sleeve. Step 5: Weld and fix. Weld and fix the end of the steel bar to the sleeve through the welding groove on the outer wall of the middle section of the sleeve.

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